JPS645087B2 - - Google Patents
Info
- Publication number
- JPS645087B2 JPS645087B2 JP10110980A JP10110980A JPS645087B2 JP S645087 B2 JPS645087 B2 JP S645087B2 JP 10110980 A JP10110980 A JP 10110980A JP 10110980 A JP10110980 A JP 10110980A JP S645087 B2 JPS645087 B2 JP S645087B2
- Authority
- JP
- Japan
- Prior art keywords
- composition
- iron
- pearlite
- less
- chilled
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000203 mixture Substances 0.000 claims description 78
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 25
- 229910000734 martensite Inorganic materials 0.000 claims description 24
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 20
- 229910001562 pearlite Inorganic materials 0.000 claims description 17
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 claims description 16
- 229910001018 Cast iron Inorganic materials 0.000 claims description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 12
- 229910052799 carbon Inorganic materials 0.000 claims description 10
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 9
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 238000005121 nitriding Methods 0.000 claims description 9
- 229910052698 phosphorus Inorganic materials 0.000 claims description 9
- 239000011574 phosphorus Substances 0.000 claims description 9
- 229910052710 silicon Inorganic materials 0.000 claims description 9
- 239000010703 silicon Substances 0.000 claims description 9
- 229910052717 sulfur Inorganic materials 0.000 claims description 9
- 239000011593 sulfur Substances 0.000 claims description 9
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 8
- 229910000805 Pig iron Inorganic materials 0.000 claims description 8
- 229910052748 manganese Inorganic materials 0.000 claims description 8
- 239000011572 manganese Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 7
- 229910052804 chromium Inorganic materials 0.000 claims description 7
- 239000011651 chromium Substances 0.000 claims description 7
- 150000004767 nitrides Chemical class 0.000 claims description 7
- 239000003921 oil Substances 0.000 claims description 7
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims description 6
- 239000011733 molybdenum Substances 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 238000005461 lubrication Methods 0.000 claims description 5
- 238000010791 quenching Methods 0.000 claims description 4
- 230000000171 quenching effect Effects 0.000 claims description 4
- 229910001021 Ferroalloy Inorganic materials 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 239000013043 chemical agent Substances 0.000 claims description 2
- 230000003746 surface roughness Effects 0.000 claims description 2
- 238000005496 tempering Methods 0.000 claims 4
- 239000004576 sand Substances 0.000 description 6
- 150000001247 metal acetylides Chemical class 0.000 description 4
- 238000005266 casting Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- CDRCPXYWYPYVPY-UHFFFAOYSA-N iron(2+) oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[Fe+2].[Fe+2].[Fe+2].[Fe+2] CDRCPXYWYPYVPY-UHFFFAOYSA-N 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D5/00—Heat treatments of cast-iron
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、自動車のロツカアーム、タペツト等
のバルブリフターまたはカムシヤフト等におい
て、耐摩耗性、負荷能力その他の機械的性質の向
上を図ることを目的とし、炭化物を晶出した組成
と、機械的性質に富むソルバイト組成と、耐摩耗
性の表面を有する耐摩耗性表面鋳鉄を得ようとす
るものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention aims to improve the wear resistance, load capacity and other mechanical properties of valve lifters or camshafts such as rocker arms and tappets of automobiles. The aim is to obtain a wear-resistant surface cast iron having a composition in which carbides are crystallized, a sorbite composition rich in mechanical properties, and a wear-resistant surface.
従来技術
近来、自動車用内燃機関等の性能が著しく向上
し、そのためにロツカアーム、タペツト等のバル
ブリフターまたはカムシヤフト等において、耐摩
耗性、負荷能力その他の機械的性質の向上が要求
されて来た。BACKGROUND OF THE INVENTION In recent years, the performance of internal combustion engines for automobiles has significantly improved, and therefore valve lifters such as rocker arms and tappets, camshafts, etc. have been required to have improved wear resistance, load capacity, and other mechanical properties.
従来のチル化したチル鋳鉄では、堅硬度が低く
耐摩耗性も乏しく、また機械的性能に劣る欠点が
あるために、そのチル鋳鉄の組成中に一層硬質の
マルテンサイト組成を形成させることが行なわれ
ている。 Conventional chilled cast iron has low hardness, poor wear resistance, and poor mechanical performance, so it has been difficult to form a harder martensitic composition in the chilled cast iron composition. It is.
発明が解決しようとする問題点
本発明は上述のごとき問題点を解決しようとす
るものであつて、上述のマルテンサイト組成の鋳
鉄では堅硬度に富むが、その強靭性等の機械的性
質に乏しく、繰り返し応力によつて機械的疲労を
生ずる欠点がある。これに対して、ソルバイト組
成は堅硬度に富むと共に、強靭性及び繰り返し応
力による機械的疲労を生じさせない等の機械的性
質に優れたものである。Problems to be Solved by the Invention The present invention attempts to solve the above-mentioned problems. Cast iron with the above-mentioned martensitic composition has high hardness, but lacks mechanical properties such as toughness. However, it has the disadvantage of causing mechanical fatigue due to repeated stress. On the other hand, the sorbite composition is rich in hardness and has excellent mechanical properties such as toughness and not causing mechanical fatigue due to repeated stress.
問題点を解決するための手段
本発明は上述のごとき問題点を解決するため、
チル化鋳鉄組織中にソルバイト組成を析出させた
もので、その第１の発明は、
炭 素 3.0〜3.5wt％
ケイ素 1.0〜4.5wt％
マンガン 0.2〜1.1wt％
リ ン 0.45wt％以下
イオウ 0.08wt％以下
鉄 91.0〜96.0wt％
の組成から成る銑鉄を溶解したものを鋳型内に注
入し、冷し金によつて、耐摩耗性を必要とする表
面に、多量の炭化物を晶出した組成とパーライト
組成とから成るチル化層を形成し、これを800℃
〜900℃で油焼き入れして、そのパーライト組成
をマルテンサイト組成に変成し、更に、これを
500℃〜600℃で焼戻しして、そのマルテンサイト
組成をソルバイト組成に変成することを特徴とし
て成るものである。Means for Solving the Problems The present invention solves the above problems by:
The first invention is one in which a sorbite composition is precipitated in a chilled cast iron structure.Carbon 3.0-3.5wt% Silicon 1.0-4.5wt% Manganese 0.2-1.1wt% Phosphorus 0.45wt% or less Sulfur 0.08wt Pig iron with a composition of 91.0 to 96.0 wt% iron is poured into a mold and cooled to form a composition that crystallizes a large amount of carbide on the surface that requires wear resistance. A chilled layer consisting of pearlite composition is formed and heated to 800℃.
The pearlite composition is transformed into martensitic composition by oil quenching at ~900℃, and this is further transformed into martensite composition.
It is characterized by being tempered at 500°C to 600°C to transform its martensite composition into a sorbite composition.
また第２の発明は、
炭 素 3.00〜3.50wt％
ケイ素 1.00〜4.50wt％
マンガン 0.20〜1.10wt％
リ ン 0.45wt％以下
イオウ 0.08wt％以下
鉄 91.00〜96.00wt％
の組成から成る銑鉄を溶解したものを鋳型内に注
入し、冷し金によつて、耐摩耗性を必要とする表
面に、多量の炭化物を晶出した組成とパーライト
組成とから成るチル化層を形成し、これを800℃
〜900℃で油焼き入れして、そのパーライト組成
をマルテンサイト組成に変成し、更に、これを
500℃〜600℃で焼戻しして、そのマルテンサイト
組成をソルバイト組成に変成し、このマルテンサ
イト組成をソルバイト組成に変成する処理を施し
た素材の表面を研磨して、表面の粗さを、1μ以
下の平滑面にし、その表面に、窒化炉にて、窒化
処理を施して窒化物層を形成し、更に、その表面
に初期潤滑として、化成薬剤処理または水蒸気雰
囲気処理によつて、四、三酸化鉄の酸化鉄層を形
成させる事を特徴として成るものである。 The second invention also provides a method for melting pig iron having the following compositions: carbon 3.00 to 3.50 wt%, silicon 1.00 to 4.50 wt%, manganese 0.20 to 1.10 wt%, phosphorus 0.45 wt% or less, sulfur 0.08 wt% or less, and iron 91.00 to 96.00 wt%. This is poured into a mold, and a chilled layer consisting of a large amount of carbide crystallized composition and pearlite composition is formed on the surface that requires wear resistance using a chilled metal. ℃
The pearlite composition is transformed into martensitic composition by oil quenching at ~900℃, and this is further transformed into martensite composition.
The surface of the material is tempered at 500℃ to 600℃ to transform its martensite composition to sorbite composition, and the surface of the material is polished to a roughness of 1 μm. The following smooth surface is formed, and the surface is subjected to nitriding treatment in a nitriding furnace to form a nitride layer, and then the surface is treated with a chemical agent or steam atmosphere for initial lubrication. It is characterized by forming an iron oxide layer of iron oxide.
また第３の発明は、
炭 素 3.0〜4.0wt％
ケイ素 1.5〜2.5wt％
マンガン 0.5〜1.0wt％
リ ン 0.3wt％以下
イオウ 0.2wt％以下
ニツケル 0.1〜1.0wt％
クロム 0.1〜1.0wt％
モリブデン 0.1〜1.0wt％
鉄 89.5〜95.0wt％
の組成から成る、フエロ銑鉄を溶解したものを鋳
型内に注入し、冷し金によつて、耐摩耗性を必要
とする表面に、多量の炭化物を晶出した組成とパ
ーライト組成とから成るチル化層を形成し、これ
を800℃〜900℃で油焼き入れして、そのパーライ
ト組成をマルテンサイト組成に変成し、更に、
500℃〜600℃で焼戻しして、そのマルテンサイト
組成をソルバイト組成に変成することを特徴とし
て成るものである。 Further, the third invention is as follows: Carbon 3.0-4.0wt% Silicon 1.5-2.5wt% Manganese 0.5-1.0wt% Phosphorus 0.3wt% or less Sulfur 0.2wt% or less Nickel 0.1-1.0wt% Chromium 0.1-1.0wt% Molybdenum Melted ferro pig iron with a composition of 0.1 to 1.0 wt% iron and 89.5 to 95.0 wt% iron is poured into a mold, and a large amount of carbide is applied to the surface that requires wear resistance using a cooling metal. A chilled layer consisting of a crystallized composition and a pearlite composition is formed, and this is oil quenched at 800°C to 900°C to transform the pearlite composition into a martensitic composition, and further,
It is characterized by being tempered at 500°C to 600°C to transform its martensite composition into a sorbite composition.
また第４の発明は、
炭 素 3.00〜4.00wt％
ケイ素 1.50〜2.50wt％
マンガン 0.50〜1.00wt％
リ ン 0.30wt％以下
イオウ 0.20wt％以下
ニツケル 0.01〜1.00wt％
クロム 0.01〜1.00wt％
モリブデン 0.01〜1.00wt％
鉄 89.00〜94.00wt％
の組成から成るフエロ合金銑鉄を溶解したものを
鋳型内に注入し、冷し金によつて、耐摩耗性を必
要とする表面に、多量の炭化物を晶出した組成と
パーライト組成とから成るチル化層を形成し、こ
れを800℃〜900℃で油焼き入れして、そのパーラ
イト組成をマルテンサイト組成に変成し、更に、
500℃〜600℃で焼戻しして、そのマルテンサイト
組成をソルバイト組成に変成し、このマルテンサ
イト組成をソルバイト組成に変成する処理を施し
た素材の表面を研磨して、表面の粗さを1μ以下
の平滑面にし、その表面に、窒化炉にて、窒化処
理を施して窒化物層を形成し、更に、その表面に
初期潤滑として、化成薬剤処理または水蒸気雰囲
気処理によつて、四、三酸化鉄の酸化鉄層を形成
させることを特徴として成るものである。 Further, the fourth invention is as follows: Carbon 3.00-4.00wt% Silicon 1.50-2.50wt% Manganese 0.50-1.00wt% Phosphorus 0.30wt% or less Sulfur 0.20wt% or less Nickel 0.01-1.00wt% Chromium 0.01-1.00wt% Molybdenum A molten ferroalloy pig iron with a composition of 0.01 to 1.00 wt% iron and 89.00 to 94.00 wt% iron is poured into a mold, and a large amount of carbide is applied to the surface that requires wear resistance using a chilled metal. A chilled layer consisting of a crystallized composition and a pearlite composition is formed, and this is oil quenched at 800°C to 900°C to transform the pearlite composition into a martensitic composition, and further,
The surface of the material is tempered at 500℃ to 600℃ to transform its martensite composition to sorbite composition, and the surface of the material is polished to a surface roughness of 1 μ or less. A nitride layer is formed on the surface by nitriding in a nitriding furnace, and then tetra- and trioxide is added to the surface as initial lubrication by chemical chemical treatment or steam atmosphere treatment. It is characterized by forming an iron oxide layer of iron.
上記方法により、きわめて簡易、確実に多量の
炭化物を晶出した組成とソルバイト組成とを存在
させた耐摩耗性表面鋳鉄を得る事ができるものと
なる。 By the above method, it is possible to obtain wear-resistant surface cast iron having a composition in which a large amount of carbide crystallized and a sorbite composition are present in an extremely simple and reliable manner.
実施例
以下本発明の一実施例を図面に於いて説明すれ
ば、前記原素材を図示しない電気炉またはキユー
ポラ等の溶解炉内において溶解し、これを取り鍋
に採り、直ちに第１図に示すごとき砂型１内に湯
道２を通して砂型の型洞３内に注湯し、凝固させ
る。EXAMPLE An example of the present invention will be described below with reference to the drawings.The raw material is melted in an electric furnace or a melting furnace such as a cupola (not shown), and then poured into a ladle and immediately shown in FIG. The molten metal is passed through a runner 2 into a sand mold 1 and poured into a cavity 3 of the sand mold to solidify.
その場合に、その注湯は型洞３の底部にセツト
した冷し金４によつて急冷却されて凝固すると同
時に、炭素を多量に固溶した炭化物が晶出され
て、その部分の表面がチル化されて、チル化層５
が形成される。この際、他の部分は砂型１の地肌
によつて徐冷却されるので、炭化物の晶出は少な
く、チル化されることがない。その鋳放しのチル
化層５は、多量の炭化物を晶出した組成となり、
その他はパーライト組成と少量の遊離黒鉛から成
つている。この組成原素材を使用したチル化鋳鉄
は、これを800℃〜900℃で油焼きして、そのパー
ライト組成をマルテンサイト組成化し、これを
500℃〜600℃で焼戻してソルバイト組成化する。 In that case, the poured metal is rapidly cooled and solidified by the chiller 4 set at the bottom of the mold cavity 3, and at the same time, carbide containing a large amount of carbon in solid solution is crystallized, and the surface of that part is Chilled, chilled layer 5
is formed. At this time, other parts are slowly cooled by the surface of the sand mold 1, so that less carbides crystallize and are not chilled. The as-cast chilled layer 5 has a composition in which a large amount of carbide is crystallized,
The rest consists of a pearlite composition and a small amount of free graphite. Chilled cast iron using this composition raw material is made by oil-sintering it at 800℃ to 900℃ to change its pearlite composition to martensitic composition.
It is tempered at 500°C to 600°C to form a sorbite composition.
次いで、このチル化鋳鉄の表面を、第３図に示
すごとく研磨して、粗さが1μ以下の平滑面６と
し、これを窒化炉で500℃〜600℃において深さが
30μ以下で窒化して第４図に示すごとく窒化層７
を構成させる。更にこの窒化層７の表面に初期潤
滑として化成薬剤処理または水蒸気雰囲気処理に
よつて、四、三酸化鉄等の酸化鉄層８を第５図に
示すごとく構成して、その製品の処理を完了す
る。 Next, the surface of this chilled cast iron is polished to a smooth surface 6 with a roughness of 1μ or less as shown in Fig. 3, and this is polished in a nitriding furnace at 500°C to 600°C to a depth.
The nitrided layer 7 is formed by nitriding at a thickness of 30μ or less as shown in Fig. 4.
be configured. Furthermore, an iron oxide layer 8 such as iron tetraoxide or trioxide is formed on the surface of this nitrided layer 7 as shown in FIG. 5 by chemical chemical treatment or steam atmosphere treatment for initial lubrication, and the treatment of the product is completed. do.
また本発明方法に係る鋳鉄の成分組成そのもの
は、特に新規性を有するものではなく、極一般的
な市販品を用いたにすぎないものであるが、第
１、第２の発明に於いて、炭素が3.00wt％より少
ないとチル化しないし、3.50wt％より多いと遊離
黒鉛を生じ材料が弱くなる。またケイ素は1.00wt
％より少ないと硬度が弱くなるし、4.50wt％より
多いと脆い材質となる。またマンガン、リン、イ
オウは、不可避的に含まれるものである。第３、
第４の発明に於いて上記組成に、ニツケル、クロ
ム、モリブデンを少量入れることにより、材料の
靭性、硬さ、結晶の細かさを付加する事ができ
る。そしてニツケルは、0.01wt％より少ないと靭
性が無くなるし、1.00wt％より多いと硬くなり過
ぎ加工が困難となる。またクロムは0.01wt％より
少ないと炭化物が少なく柔らかくなるし、1.00wt
％より多いと炭化物ができすぎて脆いものとな
る。またモリブデンは、0.01wt％より少ないと結
晶が粗いものとなり、1.00wt％より多いと硬くな
り加工が困難となる。 Furthermore, the composition of the cast iron according to the method of the present invention is not particularly novel, and merely uses a very common commercially available product; however, in the first and second inventions, If carbon is less than 3.00wt%, it will not be chilled, and if it is more than 3.50wt%, free graphite will be produced and the material will be weak. Also, silicon is 1.00wt
If it is less than 4.50wt%, the hardness will be weakened, and if it is more than 4.50wt%, the material will be brittle. Furthermore, manganese, phosphorus, and sulfur are unavoidably included. Third,
In the fourth invention, by adding a small amount of nickel, chromium, and molybdenum to the above composition, toughness, hardness, and crystal fineness of the material can be added. If the content of nickel is less than 0.01wt%, the toughness will be lost, and if the content is more than 1.00wt%, it will become too hard and difficult to process. Also, if chromium is less than 0.01wt%, there will be fewer carbides and it will become softer, and if chromium is less than 0.01wt%, it will become softer.
If it exceeds %, too much carbide is formed and the product becomes brittle. Furthermore, if molybdenum is less than 0.01 wt%, the crystals will be coarse, and if it is more than 1.00 wt%, it will become hard and difficult to process.
発明の効果
本発明は上述のごとく構成したものであるか
ら、多量の炭化物を晶出した組成とソルバイト組
成を有する耐摩耗鋳鉄が得られ、これの表面に窒
化層および酸化鉄層が構成されることになるの
で、堅硬、強靭にして機械的性能に優れた製品と
なり、ロツカアーム、タペツト等のバルブリフタ
ーまたはカムシヤフト等において、耐摩耗性、負
荷能力その他の機械的性質の向上を得ることがで
きる。Effects of the Invention Since the present invention is configured as described above, wear-resistant cast iron having a composition in which a large amount of carbides is crystallized and a sorbite composition is obtained, and a nitride layer and an iron oxide layer are formed on the surface of the cast iron. As a result, the product is hard, strong, and has excellent mechanical performance, and can be used in valve lifters such as rocker arms and tappets, or camshafts, etc., with improved wear resistance, load capacity, and other mechanical properties.
図面は本発明の一実施例を示すものであつて、
第１図は鋳造砂型の断面図、第２図は鋳造砂型内
のチル化層部分の拡大断面図、第３図はチル化層
部分を研磨した状態を示す拡大断面図、第４図は
窒化層の形成された状態を示す拡大断面図、第５
図は窒化層の表面に酸化鉄層を形成した状態の拡
大断面図である。
１……砂型、４……冷し金、５……チル化層、
６……平滑面、７……窒化層、８……酸化鉄層。
The drawings show one embodiment of the invention,
Figure 1 is a cross-sectional view of the casting sand mold, Figure 2 is an enlarged cross-sectional view of the chilled layer part in the casting sand mold, Figure 3 is an enlarged cross-sectional view showing the chilled layer part polished, and Figure 4 is the nitrided layer. Expanded sectional view showing the state in which the layer is formed, No. 5
The figure is an enlarged cross-sectional view of a state in which an iron oxide layer is formed on the surface of a nitride layer. 1... Sand mold, 4... Chilled metal, 5... Chilled layer,
6...Smooth surface, 7...Nitride layer, 8...Iron oxide layer.
Claims (1)
入し、冷し金によつて、耐摩耗性を必要とする表
面に、多量の炭化物を晶出した組成とパーライト
組成とから成るチル化層を形成し、これを800℃
〜900℃で油焼き入れして、そのパーライト組成
をマルテンサイト組成に変成し、更に、これを
500℃〜600℃で焼戻しして、そのマルテンサイト
組成をソルバイト組成に変成することを特徴とす
る耐摩耗表面鋳鉄の処理法。 ２ 炭 素 3.00〜3.50wt％ ケイ素 1.00〜4.50wt％ マンガン 0.20〜1.10wt％ リ ン 0.45wt％以下 イオウ 0.08wt％以下 鉄 91.00〜96.00wt％ の組成から成る銑鉄を溶解したものを鋳型内に注
入し、冷し金によつて、耐摩耗性を必要とする表
面に、多量の炭化物を晶出した組成とパーライト
組成とから成るチル化層を形成し、これを800℃
〜900℃で油焼き入れして、そのパーライト組成
をマルテンサイト組成に変成し、更に、これを
500℃〜600℃で焼戻しして、そのマルテンサイト
組成をソルバイト組成に変成し、このマルテイン
サイト組成をソルバイト組成に変成する処理を施
した素材の表面を研磨して、表面の粗さを、1μ
以下の平滑面にし、その表面に、窒化炉にて、窒
化処理を施して窒化物層を形成し、更に、その表
面に初期潤滑として、化成薬剤処理または水蒸気
雰囲気処理によつて、四、三酸化鉄の酸化鉄層を
形成させることを特徴とする耐摩耗表面鋳鉄の処
理法。 ３ 炭 素 3.00〜4.00wt％ ケイ素 1.50〜2.50wt％ マンガン 0.50〜1.00wt％ リ ン 0.30wt％以下 イオウ 0.20wt％以下 ニツケル 0.01〜1.00wt％ クロム 0.01〜1.00wt％ モリブデン 0.01〜1.00wt％ 鉄 89.00〜94.00wt％ の組成から成るフエロ合金銑鉄を溶解したものを
鋳型内に注入し、冷し金によつて、耐摩耗性を必
要とする表面に、多量の炭化物を晶出した組成と
パーライト組成とから成るチル化層を形成し、こ
れを800℃〜900℃で油焼き入れして、そのパーラ
イト組成をマルテンサイト組成に変成し、更に、
500℃〜600℃で焼戻しして、そのマルテンサイト
組成をソルバイト組成に変成することを特徴とす
る耐摩耗表面鋳鉄の処理法。 ４ 炭 素 3.00〜4.00wt％ ケイ素 1.50〜2.50wt％ マンガン 0.50〜1.00wt％ リ ン 0.30wt％以下 イオウ 0.20wt％以下 ニツケル 0.01〜1.00wt％ クロム 0.01〜1.00wt％ モリブデン 0.01〜1.00wt％ 鉄 89.00〜94.00wt％ の組成から成るフエロ合金銑鉄を溶解したものを
鋳型内に注入し、冷し金によつて、耐摩耗性を必
要とする表面に、多量の炭化物を晶出した組成と
パーライト組成とから成るチル化層を形成し、こ
れを800℃〜900℃で油焼き入れして、そのパーラ
イト組成をマルテンサイト組成に変成し、更に、
500℃〜600℃で焼戻しして、そのマルテンサイト
組成をソルバイト組成に変成し、このマルテンサ
イト組成をソルバイト組成に変成する処理を施し
た素材の表面を研磨して、表面の粗さを1μ以下
の平滑面にし、その表面に、窒化炉にて、窒化処
理を施して窒化物層を形成し、更に、その表面に
初期潤滑として、化成薬剤処理または水蒸気雰囲
気処理によつて、四、三酸化鉄の酸化鉄層を形成
させることを特徴とする耐摩耗表面鋳鉄の処理
法。[Claims] 1. Melting pig iron consisting of the following compositions: 1 Carbon 3.00-3.50wt% Silicon 1.00-4.50wt% Manganese 0.20-1.10wt% Phosphorus 0.45wt% or less Sulfur 0.08wt% or less Iron 91.00-96.00wt% This is poured into a mold, and a chilled layer consisting of a large amount of carbide crystallized composition and pearlite composition is formed on the surface that requires wear resistance using a chilled metal. ℃
The pearlite composition is transformed into martensitic composition by oil quenching at ~900℃, and this is further transformed into martensite composition.
A method for treating cast iron with a wear-resistant surface, which is characterized by tempering at 500°C to 600°C to transform its martensitic composition into a sorbite composition. 2 Carbon 3.00-3.50wt% Silicon 1.00-4.50wt% Manganese 0.20-1.10wt% Phosphorus 0.45wt% or less Sulfur 0.08wt% or less Iron 91.00-96.00wt% Melted pig iron is placed in a mold. A chilled layer consisting of a large amount of carbide crystallized composition and pearlite composition is formed on the surface requiring wear resistance using a chilled metal, and then heated to 800℃.
The pearlite composition is transformed into martensitic composition by oil quenching at ~900℃, and this is further transformed into martensite composition.
Tempering at 500°C to 600°C transforms the martensite composition to sorbite composition, and polishes the surface of the material that has been treated to transform the martensite composition to sorbite composition to reduce the roughness of the surface. 1μ
The following smooth surface is formed, and the surface is subjected to nitriding treatment in a nitriding furnace to form a nitride layer, and then the surface is treated with a chemical agent or steam atmosphere for initial lubrication. A method for treating cast iron with a wear-resistant surface characterized by forming an iron oxide layer of iron oxide. 3 Carbon 3.00-4.00wt% Silicon 1.50-2.50wt% Manganese 0.50-1.00wt% Phosphorus 0.30wt% or less Sulfur 0.20wt% or less Nickel 0.01-1.00wt% Chromium 0.01-1.00wt% Molybdenum 0.01-1.00wt% iron A molten ferroalloy pig iron with a composition of 89.00 to 94.00wt% is poured into a mold and cooled to produce a large amount of carbide crystallized on the surface that requires wear resistance and pearlite. A chilled layer consisting of a composition is formed, and this is oil quenched at 800°C to 900°C to transform the pearlite composition to a martensitic composition, and further,
A method for treating cast iron with a wear-resistant surface, which is characterized by tempering at 500°C to 600°C to transform its martensitic composition into a sorbite composition. 4 Carbon 3.00-4.00wt% Silicon 1.50-2.50wt% Manganese 0.50-1.00wt% Phosphorus 0.30wt% or less Sulfur 0.20wt% or less Nickel 0.01-1.00wt% Chromium 0.01-1.00wt% Molybdenum 0.01-1.00wt% iron A molten ferroalloy pig iron with a composition of 89.00 to 94.00wt% is poured into a mold and cooled to produce a large amount of carbide crystallized on the surface that requires wear resistance and pearlite. Form a chilled layer consisting of a composition of
Tempering at 500°C to 600°C transforms the martensite composition to sorbite composition, and polishes the surface of the material that has been treated to transform the martensite composition to sorbite composition to reduce the surface roughness to 1μ or less The surface is made smooth and nitrided in a nitriding furnace to form a nitride layer, and the surface is then treated with tetra- and tri-oxides as initial lubrication by chemical chemical treatment or steam atmosphere treatment. A method for treating cast iron with a wear-resistant surface characterized by forming an iron oxide layer on the iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10110980A JPS5726120A (en) | 1980-07-25 | 1980-07-25 | Treatment of cast iron having abrasion resistant surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10110980A JPS5726120A (en) | 1980-07-25 | 1980-07-25 | Treatment of cast iron having abrasion resistant surface |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5701288A Division JPS63317622A (en) | 1988-03-10 | 1988-03-10 | Treatment of cast iron having wear resistant surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5726120A JPS5726120A (en) | 1982-02-12 |
| JPS645087B2 true JPS645087B2 (en) | 1989-01-27 |
Family
ID=14291898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10110980A Granted JPS5726120A (en) | 1980-07-25 | 1980-07-25 | Treatment of cast iron having abrasion resistant surface |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5726120A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63118049A (en) * | 1986-11-07 | 1988-05-23 | Mazda Motor Corp | Apex seal for rotary piston engine and its production |
-
1980
- 1980-07-25 JP JP10110980A patent/JPS5726120A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5726120A (en) | 1982-02-12 |
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