JPH0694060B2 - Corrosion resistant jig for molten steel - Google Patents
Corrosion resistant jig for molten steelInfo
- Publication number
- JPH0694060B2 JPH0694060B2 JP1174102A JP17410289A JPH0694060B2 JP H0694060 B2 JPH0694060 B2 JP H0694060B2 JP 1174102 A JP1174102 A JP 1174102A JP 17410289 A JP17410289 A JP 17410289A JP H0694060 B2 JPH0694060 B2 JP H0694060B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- parts
- zrb
- mosi
- molten steel
- 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 - Fee Related
Links
- 230000007797 corrosion Effects 0.000 title claims description 14
- 238000005260 corrosion Methods 0.000 title claims description 14
- 229910000831 Steel Inorganic materials 0.000 title claims description 6
- 239000010959 steel Substances 0.000 title claims description 6
- 229910016006 MoSi Inorganic materials 0.000 claims description 13
- 229910006249 ZrSi Inorganic materials 0.000 claims description 10
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 description 9
- 230000035939 shock Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000005245 sintering Methods 0.000 description 8
- 238000005452 bending Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000010304 firing Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000007731 hot pressing Methods 0.000 description 3
- 238000013329 compounding Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000001272 pressureless sintering Methods 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 229910021332 silicide Inorganic materials 0.000 description 1
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Ceramic Products (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は溶鋼等侵食性の高い溶融金属の処理に用いる耐
溶融金属性治具に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a molten metal resistant jig used for treating molten metal such as molten steel having high erosiveness.
耐溶融金属性部材として各種セラミツクス材料が検討さ
れ、BNあるいはSi3N4-AlN-BN系が主に採用されている。
例えば特公昭63-58793号公報にはZrB2-BN系複合焼結体
を溶融金属流通用耐火物に適用することが示されてい
る。しかしながら、配合組成により機械的強度と耐熱衝
撃性、耐食性が異なり、必ずしも物性バランスのとれた
部材が適用されているとは言い難い。例えば耐熱衝撃性
を向上させるためにBNの添加量を増やすと耐食性と機械
的強度が急激に低下するし、また焼結方法もホツトプレ
ス法に限定され、焼成条件は温度2000℃以上、圧力500k
g/cm2以上でなければならないといつた通常では困難な
もので、成形体の形状、大きさも限られるといつた問題
点があつた。Various ceramic materials have been studied as the molten metal resistant member, and BN or Si 3 N 4 -AlN-BN system is mainly adopted.
For example, Japanese Patent Publication No. 63-58793 discloses that a ZrB 2 —BN composite sintered body is applied to a refractory for flowing molten metal. However, mechanical strength, thermal shock resistance, and corrosion resistance differ depending on the compounding composition, and it cannot be said that a member having well-balanced physical properties is necessarily applied. For example, if the amount of BN added is increased to improve the thermal shock resistance, the corrosion resistance and mechanical strength decrease sharply, and the sintering method is also limited to the hot press method.
It is usually difficult if it should be g / cm 2 or more, and there were problems when the shape and size of the molded body were limited.
本発明者らは、上記問題点を解決するため鋭意検討した
結果、ZrB2-AlN-BN-MoSi2あるいはZrB2-AlN-BN-ZrSi2の
系が従来にない耐食性、機械的強度及び耐熱衝撃性に優
れた耐溶融金属性治具が得られることを見い出し、本発
明を完成するに到つた。The present inventors have conducted extensive studies to solve the above problems, ZrB 2 -AlN-BN-MoSi 2 or ZrB 2 -AlN-BN-ZrSi 2 system corrosion resistance, mechanical strength and heat resistance unprecedented. It was found that a molten metal resistant jig having excellent impact resistance can be obtained, and the present invention has been completed.
〔課題を解決するための手段〕 即ち、本発明は、ZrB235〜89重量部、BN5〜25重量部、A
lN1〜20重量部並びにMoSi2及び／又はZrSi25〜20重量部
からなる混合物の焼結体からなることを特徴とする鉄鋼
溶湯用耐食性治具である。[Means for Solving the Problems] That is, the present invention is ZrB 2 35-89 parts by weight, BN 5-25 parts by weight, A
A corrosion-resistant jig for molten steel, comprising a sintered body of a mixture of 1 to 20 parts by weight of NN and 5 to 20 parts by weight of MoSi 2 and / or ZrSi 2 .
以下、さらに詳しく本発明について説明する。The present invention will be described in more detail below.
耐溶融金属性治具には溶湯注入用ノズル例えば水平連鋳
用ノズルがある。また鋳片引抜きを円滑に行なうために
タンデイツシユとモールド間の接続用耐火物あるいはブ
レークリングが重要な役目を果すが、この耐火物材質の
具備特性として、耐熱衝撃性、高耐食性、高潤滑性、機
械加工性等が要求される。これらの要求を満たすには、
ZrB2-BN系が最も適するが、本発明のZrB2-AlN-BN-MoSi2
及び／又はZrSi2系はより以上にバランスのとれた諸性
能を発揮するものである。さらに焼成温度は従来より低
温で、ホツトプレス法だけでなく常圧焼結法でも作製可
能である。The molten metal resistant jig includes a molten metal injection nozzle, for example, a horizontal continuous casting nozzle. In addition, a refractory for connection between the tundish and the mold or a break ring plays an important role in smoothly extracting the cast slab, and the refractory material has the following properties: thermal shock resistance, high corrosion resistance, high lubricity, Machinability is required. To meet these requirements,
The ZrB 2 -BN system is most suitable, but the ZrB 2 -AlN-BN-MoSi 2 of the present invention is the most suitable.
And / or the ZrSi 2 system exhibits more balanced performances. Furthermore, the firing temperature is lower than in the past, and it can be produced not only by the hot pressing method but also by the atmospheric pressure sintering method.
原料の配合組成は、ZrB235〜89重量部、BN5〜25重量
部、AlN1〜20重量部並びにMoSi2及び／又はZrSi25〜20
重量部である。好ましくは、ZrB255〜85重量部、AlN3〜
15重量部、BN10〜25重量部、MoSi2及び／又はZrSi25〜1
5重量部である。BNは少なすぎると耐熱衝撃性が期待で
きず、多すぎると耐食性が低下する。MoSi2及び／又はZ
rSi2は少なすぎると焼結性が向上せず、また、多すぎる
とZrB2本来の性質を損なう。AlNは耐食性を向上させる
ために用いる。The composition of the raw materials is ZrB 2 35 to 89 parts by weight, BN 5 to 25 parts by weight, AlN 1 to 20 parts by weight and MoSi 2 and / or ZrSi 2 5 to 20 parts by weight.
Parts by weight. Preferably, ZrB 2 55 to 85 parts by weight, AlN 3 to
15 parts by weight, BN 10 to 25 parts by weight, MoSi 2 and / or ZrSi 2 5 to 1
5 parts by weight. If the amount of BN is too small, thermal shock resistance cannot be expected, and if it is too large, corrosion resistance decreases. MoSi 2 and / or Z
If the amount of rSi 2 is too small, the sinterability does not improve, and if it is too large, the original properties of ZrB 2 are impaired. AlN is used to improve corrosion resistance.
本発明に用いるZrB2、BN、AlN、MoSi2及び／又はZrSi2
の原料として、純度は95％以上で、粒度は平均10μｍ以
下好ましくは５μｍ以下である。金属珪化物としてはMo
Si2、ZrSi2が用いられる。ZrB 2 , BN, AlN, MoSi 2 and / or ZrSi 2 used in the present invention
As a raw material, the purity is 95% or more, and the average particle size is 10 μm or less, preferably 5 μm or less. Mo as a metal silicide
Si 2 and ZrSi 2 are used.
原料の混合は乾式、湿式のどちらでも良く、通常はボー
ルミル等で行ない、必要に応じ有機バインダーを添加す
る。成形は一般に行なわれている金型プレス、CIP、ス
リツプキヤスト、射出成形等を採用する。The raw materials may be mixed in either a dry type or a wet type, and are usually used in a ball mill or the like, and an organic binder is added if necessary. For molding, generally used mold press, CIP, slip cast, injection molding, etc. are adopted.
焼成方法は真空あるいは還元雰囲気中で行ない、常圧焼
結、ホツトプレス焼結、HIP焼結等が用いられ、特に限
定されるものではない。焼成温度は1800〜2100℃の範囲
であり、中でも1850〜1950℃が焼結性、経済性から好ま
しい。焼成時間は最高保持温度で数十分〜数十時間の範
囲であり、形状、大きさにより適宜選択されるが、通常
は数時間程度である。The firing method is performed in a vacuum or a reducing atmosphere, and atmospheric pressure sintering, hot press sintering, HIP sintering, or the like is used, and is not particularly limited. The firing temperature is in the range of 1800 to 2100 ° C, and preferably 1850 to 1950 ° C from the viewpoint of sinterability and economy. The firing time is in the range of several tens of minutes to several tens of hours at the maximum holding temperature, and is appropriately selected depending on the shape and size, but it is usually about several hours.
以下、実施例と比較例をあげてさらに具体的に本発明を
説明する。Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples.
実施例１〜11,比較例１〜５ 平均粒度２〜３μｍのZrB2、BN、AlN、MoSi2、ZrBi2の
原料粉を所定の割合でボールミルにより混合粉砕した
後、常圧焼結及びホツトプレス焼結を行ない、得られた
焼結体から3mm×4mm×36mmの試験片を作製し、曲げ強
度、耐熱衝撃温度差及びSUS304に対する耐食性を調べ
た。その結果を表‐１に示す。Examples 1 to 11 and Comparative Examples 1 to 5 Raw material powders of ZrB 2 , BN, AlN, MoSi 2 , and ZrBi 2 having an average particle size of 2 to 3 μm were mixed and pulverized by a ball mill at a predetermined ratio, and then pressureless sintering and hot pressing. Sintering was performed, and a 3 mm × 4 mm × 36 mm test piece was prepared from the obtained sintered body, and bending strength, thermal shock resistance temperature difference, and corrosion resistance to SUS304 were examined. The results are shown in Table-1.
常圧焼結法では、金型プレス‐CIP成形（2.7ton/cm2,3m
in）を行なつた後1900℃×３時間で焼成した。また、ホ
ツトプレス法は、温度1900℃、圧力300kg/cm2、時間１
時間である。In the pressureless sintering method, die press-CIP molding (2.7ton / cm 2 , 3m
in) and baked at 1900 ° C. for 3 hours. In the hot press method, the temperature is 1900 ° C, the pressure is 300 kg / cm 2 , and the time is 1
It's time.
（１） 曲げ強度…JIS R1601に準じた。(1) Bending strength: According to JIS R1601.
（２） 耐熱衝撃温度差…試験片を電気炉中で所定の温
度に1hr保持後、水中に落下急冷した。得られた急冷試
片の曲げ強度を測定し、強度低下のあつた温度差を耐熱
衝撃温度差とした。(2) Thermal shock temperature difference: The test piece was held at a predetermined temperature for 1 hour in an electric furnace and then dropped into water and rapidly cooled. The bending strength of the obtained quenching test piece was measured, and the temperature difference causing the decrease in strength was defined as the thermal shock resistance temperature difference.
（３） SUS304の鋼片をルツボに入れ高周波誘導炉で加
熱し、1600℃で溶解させ、この溶湯中に試験片を浸漬さ
せ1hr後に取り出し侵食割合を評価した。(3) A SUS304 steel piece was placed in a crucible, heated in a high-frequency induction furnace, melted at 1600 ° C., the test piece was dipped in the molten metal, and after 1 hour, the erosion rate was evaluated.
A:反応なし B:反応性小 C:反応性大 比較例１〜３では曲げ強度が低く、比較例４と５は耐食
性が良くなかつた。A: No reaction B: Small reactivity C: Large reactivity In Comparative Examples 1 to 3, the bending strength was low, and in Comparative Examples 4 and 5, the corrosion resistance was poor.
実施例１〜８はZrB2,BN,AlN,MoSi2の配合比を変えてそ
の効果を調べたものであり、いずれも良好な強度、耐熱
衝撃性及び耐食性を示した。In Examples 1 to 8, the effects were examined by changing the compounding ratio of ZrB 2 , BN, AlN, and MoSi 2 , and all showed good strength, thermal shock resistance, and corrosion resistance.
実施例９は焼結法をホツトプレスで行つたものであり、
より高強度が得られた。実施例10は焼結助剤をMoSi2か
らZrSi2に、また、実施例11はMoSi2とZrSi2を併用した
ものであり、いずれもMoSi2を用いた場合とほぼ同等の
好結果が得られた。Example 9 was carried out by hot pressing the sintering method.
Higher strength was obtained. Example 10 is a sintering aid from MoSi 2 to ZrSi 2 , and Example 11 is a combination of MoSi 2 and ZrSi 2 , and good results almost the same as when using MoSi 2 were obtained. Was given.
本発明の鉄鋼溶湯用耐食性治具は機械的強度、耐熱衝撃
性、耐食性のいずれにも優れたものである。INDUSTRIAL APPLICABILITY The corrosion resistant jig for molten steel according to the present invention is excellent in mechanical strength, thermal shock resistance and corrosion resistance.
Claims (1)
〜20重量部並びにMoSi2及び／又はZrSi25〜20重量部か
らなる混合物の焼結体からなることを特徴とする鉄鋼溶
湯用耐食性治具。1. ZrB 2 35 to 89 parts by weight, BN 5 to 25 parts by weight, AlN 1
~ 20 parts by weight and a sintered body of a mixture of 5 to 20 parts by weight of MoSi 2 and / or ZrSi 2 are corrosion resistant jigs for molten steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1174102A JPH0694060B2 (en) | 1989-07-07 | 1989-07-07 | Corrosion resistant jig for molten steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1174102A JPH0694060B2 (en) | 1989-07-07 | 1989-07-07 | Corrosion resistant jig for molten steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0342160A JPH0342160A (en) | 1991-02-22 |
| JPH0694060B2 true JPH0694060B2 (en) | 1994-11-24 |
Family
ID=15972683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1174102A Expired - Fee Related JPH0694060B2 (en) | 1989-07-07 | 1989-07-07 | Corrosion resistant jig for molten steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0694060B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2844150B2 (en) * | 1992-11-04 | 1999-01-06 | 日新リフラテック 株式会社 | Ceramic jig for manufacturing or assembling electronic components |
-
1989
- 1989-07-07 JP JP1174102A patent/JPH0694060B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0342160A (en) | 1991-02-22 |
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