JPH0775756B2 - Surface hardening method by precision casting - Google Patents
Surface hardening method by precision castingInfo
- Publication number
- JPH0775756B2 JPH0775756B2 JP5026233A JP2623393A JPH0775756B2 JP H0775756 B2 JPH0775756 B2 JP H0775756B2 JP 5026233 A JP5026233 A JP 5026233A JP 2623393 A JP2623393 A JP 2623393A JP H0775756 B2 JPH0775756 B2 JP H0775756B2
- Authority
- JP
- Japan
- Prior art keywords
- precision casting
- mold
- casting
- surface hardening
- hardening method
- 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 - Lifetime
Links
- 238000005495 investment casting Methods 0.000 title claims description 12
- 238000000034 method Methods 0.000 title claims description 12
- 239000000919 ceramic Substances 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 14
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 238000005266 casting Methods 0.000 claims description 8
- RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 150000004767 nitrides Chemical class 0.000 claims description 3
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 description 8
- 239000002002 slurry Substances 0.000 description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 238000010304 firing Methods 0.000 description 4
- 239000003960 organic solvent Substances 0.000 description 4
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 229910010293 ceramic material Inorganic materials 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 235000019441 ethanol Nutrition 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000005240 physical vapour deposition Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001182 Mo alloy Inorganic materials 0.000 description 1
- 229910001093 Zr alloy Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Spray Control Apparatus (AREA)
- Ceramic Products (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、精密鋳造法により鋳造
材料の表面を硬化させる方法に関する。さらに詳しく
は、高融点を有する活性金属の精密鋳造法による表面硬
化方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for hardening the surface of a casting material by a precision casting method. More specifically, it relates to a surface hardening method of an active metal having a high melting point by a precision casting method.
【０００２】[0002]
【従来の技術】鋳造した材料の表面を硬化するために
は、鋳造材の表面の黒かわ（酸化層）を削り取った後、
化学蒸着（ＣＶＤ）や物理蒸着（ＰＶＤ）などにより、
硬度の高い金属あるいはセラミックス材料を被覆させる
方法が採られている。2. Description of the Related Art In order to harden the surface of a cast material, after removing the black glue (oxide layer) on the surface of the cast material,
By chemical vapor deposition (CVD) or physical vapor deposition (PVD),
A method of coating a metal or ceramic material having high hardness is adopted.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、研削工
程が余分にかかるため、複雑な形状の部品をニアネット
シェイプ成形する精密鋳造材に適用するには問題があっ
た。However, since an additional grinding process is required, there is a problem in applying the parts having a complicated shape to a precision casting material for near net shape molding.
【０００４】[0004]
【課題を解決するための手段】本発明は上記に鑑み提案
されたもので、精密鋳造用鋳型の空洞内壁に、炭化物，
窒化物，ホウ化物セラミックスから選ばれる一種以上の
セラミック粉末を塗着させた後、溶融金属を注湯して鋳
造することを特徴とする精密鋳造による表面硬化処理方
法に関するものである。SUMMARY OF THE INVENTION The present invention has been proposed in view of the above, in which a carbide is formed on the inner wall of the cavity of the precision casting mold,
The present invention relates to a surface hardening treatment method by precision casting, which comprises depositing one or more ceramic powders selected from nitride and boride ceramics, and then pouring and casting molten metal.
【０００５】上記本発明に使用する精密鋳造用鋳型とし
ては、例えばイットリア、カルシア、カーボンなどの耐
熱性に優れたセラミック材料や水冷銅鋳型などを用い
る。勿論、セラミック材料の鋳型は焼成して用いる。As the precision casting mold used in the present invention, a ceramic material having excellent heat resistance such as yttria, calcia, carbon, or a water-cooled copper mold is used. Of course, a ceramic material mold is used after firing.
【０００６】以下、本発明を具体的に説明する。まず、
炭化物，窒化物，ホウ化物セラミックスから選ばれる一
種以上のセラミック粉末を上記精密鋳造用鋳型の空洞内
壁に塗着させる。この塗着方法としては、特に限定する
ものではないが例えば上記セラミック粉末をエチルアル
コール、メチルアルコール、アセトン、ヘキサン等の有
機溶媒あるいは水中に分散してスラリーとし、このスラ
リーを鋳型の空洞内へ流し込み、１０〜６０秒程度静置
した後に残液を排出し、鋳型の空洞内を乾燥させてセラ
ミック粉末を塗着させる方法がある。The present invention will be specifically described below. First,
One or more ceramic powders selected from carbide, nitride and boride ceramics are applied to the inner wall of the cavity of the precision casting mold. The coating method is not particularly limited, but for example, the above ceramic powder is dispersed in an organic solvent such as ethyl alcohol, methyl alcohol, acetone, hexane or water to form a slurry, and the slurry is poured into the cavity of the mold. After leaving it to stand for about 10 to 60 seconds, the residual liquid is discharged, and the inside of the mold cavity is dried to apply the ceramic powder.
【０００７】尚、この方法における有機溶媒中への前記
セラミック粉末の添加量は、スラリー中１０〜９０重量
％、好ましくは３０〜８０重量％になるようにする。ス
ラリー中のセラミック粉末の添加量が１０重量％未満で
は均一な塗布膜が得られず、また、９０重量％を越える
とスラリーの流動性が低下するので好ましくない。ま
た、セラミック粉末と有機溶媒とを混合する際に分散を
十分にするためにディスパー等の攪拌機で混合するのが
好ましい。さらに、鋳型の空洞内壁への付着性を向上さ
せるために、スラリーの粘度を上げる目的で水、水溶性
有機溶剤、界面活性剤などを添加するようにしても良
い。そして、上記操作により、鋳型の空洞内壁に０．３
〜１．０ｍｍ程度のセラミック粉末の塗着層を形成する
ことができる。The amount of the ceramic powder added to the organic solvent in this method is 10 to 90% by weight, preferably 30 to 80% by weight in the slurry. If the addition amount of the ceramic powder in the slurry is less than 10% by weight, a uniform coating film cannot be obtained, and if it exceeds 90% by weight, the fluidity of the slurry decreases, which is not preferable. Further, when the ceramic powder and the organic solvent are mixed, it is preferable to mix them with a stirrer such as a disper in order to sufficiently disperse them. Further, in order to improve the adhesion of the mold to the inner wall of the cavity, water, a water-soluble organic solvent, a surfactant or the like may be added for the purpose of increasing the viscosity of the slurry. Then, by the above operation, 0.3
A coating layer of ceramic powder having a thickness of about 1.0 mm can be formed.
【０００８】次に、必要に応じて９００℃以下の温度、
好ましくは３００〜７００℃で焼成を行うが、この焼成
雰囲気は塗着させたセラミック粉末により異なるが、通
常大気か窒素雰囲気で行う。また、焼成時間は温度によ
って異なるので、特に限定するものではないが、通常１
時間程度である。Next, if necessary, a temperature of 900 ° C. or lower,
The firing is preferably carried out at 300 to 700 ° C., but this firing atmosphere is usually in the air or a nitrogen atmosphere, although it varies depending on the ceramic powder applied. The firing time is not particularly limited because it depends on the temperature, but it is usually 1
It's about time.
【０００９】最後に、この鋳型の空洞内へチタン合金、
ジルコニウム合金、モリブデン合金等の高融点で活性な
金属の溶湯を注湯して鋳造を行う。この注湯金属（鋳造
材料）については特に限定しないが、塗着させたセラミ
ック粉末と反応し易い活性な材料を使用することが好ま
しい。Finally, a titanium alloy is introduced into the cavity of the mold.
Casting is performed by pouring a molten metal having a high melting point and an active metal such as a zirconium alloy or a molybdenum alloy. The pouring metal (casting material) is not particularly limited, but it is preferable to use an active material that easily reacts with the applied ceramic powder.
【００１０】そして、本発明の表面硬化方法により、鋳
造材料の表面から２００μｍ〜２ｍｍに亙る硬化層を得
ることができる。By the surface hardening method of the present invention, a hardened layer having a thickness of 200 μm to 2 mm can be obtained from the surface of the casting material.
【００１１】[0011]
【実施例】以下、本発明の実施例を示す。EXAMPLES Examples of the present invention will be shown below.
【００１２】実施例１；ジルコニアゾル（ＮＺＳ−３０
Ｂ，日産化学工業株式会社製）１５０ｇにイットリア粉
末（信越化学株式会社製）４００ｇを添加したものを鋳
型造型用スラリーとし、電融イットリア粉末（日本研磨
材株式会社製）をスタッコ材として精密鋳造用鋳型を作
製した。さらに、鋳型を５００℃で脱ワックスし、１０
００℃で１時間焼成した。Example 1: Zirconia sol (NZS-30)
B, manufactured by NISSAN CHEMICAL INDUSTRIAL CO., LTD.) And 400 g of yttria powder (manufactured by Shin-Etsu Chemical Co., Ltd.) was used as a mold-forming slurry, and electroformed yttria powder (manufactured by Nippon Abrasive Co., Ltd.) was used as a stucco material for precision casting. A casting mold was prepared. Further, the mold is dewaxed at 500 ° C.
It was baked at 00 ° C. for 1 hour.
【００１３】次に、エチルアルコール１００ｇにＢＮ粉
末を５０ｇ添加したスラリーを鋳型の空洞内に流し込
み、３０秒間静置した後、残液を排出した。Next, a slurry prepared by adding 50 g of BN powder to 100 g of ethyl alcohol was poured into the cavity of the mold and allowed to stand for 30 seconds, after which the residual liquid was discharged.
【００１４】さらに、この鋳型を大気中５００℃で１時
間焼成した後、Ｔｉ−３４ｍａｓｓ％Ａｌの溶融金属を
注湯し、鋳型との界面からの距離による硬度の変化をビ
ッカース硬度計（荷重５ｋｇ）により測定した。この測
定結果を表１に示す。Furthermore, after baking this mold in the atmosphere at 500 ° C. for 1 hour, molten metal of Ti-34 mass% Al was poured, and the change in hardness depending on the distance from the interface with the mold was measured by a Vickers hardness meter (load: 5 kg). ) Was measured. The results of this measurement are shown in Table 1.
【００１５】[0015]
【表１】 [Table 1]
【００１６】[0016]
【発明の効果】以上説明したように、本発明は鋳造材料
の表面を容易に且つ短時間に硬化処理することができ
る。As described above, according to the present invention, the surface of the casting material can be easily hardened in a short time.
【００１７】そして、ニアネットシェイプ成形を目指す
精密鋳造法に応用することができ、表面部を硬化させる
ことにより耐摩耗性を向上することができ、工業上の有
用な効果がもたらされる。Further, it can be applied to a precision casting method aiming at near net shape molding, and by hardening the surface portion, abrasion resistance can be improved, and a useful effect in industry is brought about.
Claims (1)
空洞内壁に、炭化物，窒化物，ホウ化物セラミックスか
ら選ばれる一種以上のセラミック粉末を塗着させた後、
チタン合金など高融点で活性な溶融金属を注湯して鋳造
することを特徴とする精密鋳造による表面硬化方法。1. After applying one or more ceramic powders selected from carbide, nitride and boride ceramics to the inner wall of the cavity of a precision casting mold containing yttria ,
A surface hardening method by precision casting, which comprises pouring molten metal having a high melting point and active metal such as titanium alloy and casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5026233A JPH0775756B2 (en) | 1993-01-21 | 1993-01-21 | Surface hardening method by precision casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5026233A JPH0775756B2 (en) | 1993-01-21 | 1993-01-21 | Surface hardening method by precision casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06218487A JPH06218487A (en) | 1994-08-09 |
| JPH0775756B2 true JPH0775756B2 (en) | 1995-08-16 |
Family
ID=12187617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5026233A Expired - Lifetime JPH0775756B2 (en) | 1993-01-21 | 1993-01-21 | Surface hardening method by precision casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0775756B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106363131A (en) * | 2016-09-21 | 2017-02-01 | 上海万泽精密铸造有限公司 | Modification method for ceramic shell surface layer for titanium alloy casting |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100431738C (en) * | 2006-10-19 | 2008-11-12 | 上海大学 | Boron Nitride Composite Coatings for Investment Casting of Titanium and Titanium Alloys |
| CN103386464A (en) * | 2013-07-19 | 2013-11-13 | 宁波吉威熔模铸造有限公司 | Casting method for circular fitting of automobile spare-tyre lifter |
| CN107598136B (en) * | 2017-08-10 | 2020-11-03 | 安徽省凤形新材料科技有限公司 | Preparation method of ceramic particle metal composite material |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5841142B2 (en) * | 1976-06-17 | 1983-09-09 | ユ−エスエス エンジニア−ズ アンド コンサルタンツ インコ−ポレ−テツド | Sliding gate closing mechanism to control the flow of molten metal |
| JPS5326565A (en) * | 1976-08-25 | 1978-03-11 | Hitachi Ltd | Fluorescent face exposure unit for color braun tube |
| JPS5626667A (en) * | 1979-08-10 | 1981-03-14 | Kiyousan Gokin Chuzosho:Kk | Ceramics coating casting method |
-
1993
- 1993-01-21 JP JP5026233A patent/JPH0775756B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106363131A (en) * | 2016-09-21 | 2017-02-01 | 上海万泽精密铸造有限公司 | Modification method for ceramic shell surface layer for titanium alloy casting |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06218487A (en) | 1994-08-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |