JPS6130601A - Deposition hardening type stainless steel powder having excellent compressibility and sintered body thereof - Google Patents
Deposition hardening type stainless steel powder having excellent compressibility and sintered body thereofInfo
- Publication number
- JPS6130601A JPS6130601A JP59148626A JP14862684A JPS6130601A JP S6130601 A JPS6130601 A JP S6130601A JP 59148626 A JP59148626 A JP 59148626A JP 14862684 A JP14862684 A JP 14862684A JP S6130601 A JPS6130601 A JP S6130601A
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- less
- sus
- stainless steel
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- Prior art date
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- 239000000843 powder Substances 0.000 title claims abstract description 53
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 21
- 239000010935 stainless steel Substances 0.000 title claims abstract description 21
- 230000008021 deposition Effects 0.000 title abstract 4
- 239000000203 mixture Substances 0.000 claims abstract description 18
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910000734 martensite Inorganic materials 0.000 claims abstract description 10
- 238000009792 diffusion process Methods 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 239000010949 copper Substances 0.000 claims abstract description 6
- 229910052802 copper Inorganic materials 0.000 claims abstract description 5
- 238000004881 precipitation hardening Methods 0.000 claims description 26
- 239000002245 particle Substances 0.000 claims 6
- 238000001556 precipitation Methods 0.000 claims 1
- 238000005245 sintering Methods 0.000 abstract description 7
- 238000000465 moulding Methods 0.000 abstract description 5
- 229910052804 chromium Inorganic materials 0.000 abstract description 4
- 229910052748 manganese Inorganic materials 0.000 abstract description 3
- 229910052759 nickel Inorganic materials 0.000 abstract description 3
- 239000007791 liquid phase Substances 0.000 abstract description 2
- 239000007790 solid phase Substances 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910001035 Soft ferrite Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
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- Powder Metallurgy (AREA)
Abstract
Description
【発明の詳細な説明】
、上のＪ 分
本発明は、圧縮性に優れた析出硬化型ステンレス鋼粉末
及びその焼結体に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a precipitation hardening stainless steel powder having excellent compressibility and a sintered body thereof.
従迷１通支庸−
従来、硬さと、耐食性とを要求される焼結ステンレス鋼
の分野においては、一般的には、ＪＩＳ に４３０３
ｉ、：よッテ規定％ レティルＳＵＳ ６３１ （１７
−４ＰＨ）（Ｃ０．０５％、Ｃｒ １７％、Ｎｉ ４％
、Ｃｕ ４％、残部Ｆｅ）のプレアロイ粉末が使用され
ている。Conventionally, in the field of sintered stainless steel, which requires hardness and corrosion resistance, JIS 4303 is generally used.
i: Yotte regulation% Retil SUS 631 (17
-4PH) (C0.05%, Cr 17%, Ni 4%
, 4% Cu, balance Fe) is used.
しかしながら、このような化学成分を有するプレ７０イ
粉末は、
（１）粉末自体の組織がマルテンサイトであり、硬いた
めに、冷開成型時のグリーン密度が低いこと（２）通常
の焼結温度（１，３００°Ｃ以下）においては、液相の
発生が認められず、高焼結密度を得ることができないこ
と
などの問題点があった。However, the pre-70 powder with such chemical components has the following problems: (1) The structure of the powder itself is martensite and is hard, so the green density during cold-opening molding is low (2) The normal sintering temperature (below 1,300°C), there were problems such as no liquid phase was observed and high sintered density could not be obtained.
明が しようとする 。Ming is trying.
そこで、本発明は、冷間時の圧縮性に優れ且つ通常の焼
結法により高密度が得られる析出硬化型ステンレス鋼粉
末及びその焼結体を得ることを、その目的とするもので
ある。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to obtain a precipitation-hardening stainless steel powder and a sintered body thereof, which have excellent cold compressibility and can obtain high density by ordinary sintering methods.
１夏んま１鷹Ｊ１弓３１へ［１
本発明は、この目的を達成するために、軟力・（１オ一
ステナイト組織を有し、圧縮性に優れたＪＩＳＧ４３０
３によるＳＵＳ ３０４Ｌ、又は、ＳＵＳ ３１６Ｌの
粉末と、同様に軟かいフェライト組織を持ち、圧縮性１
こ優れたＳＵＳ ４１０Ｌの微粉末と、低融点の電解銅
粉末とヲ、最終組成においてマルテンサイト型析出硬化
組成となるような配合率でブレンドし、若しくは、拡散
接合することにより成る析出硬化型ステンレス鋼粉末を
特徴とするものであり、この鋼粉末は、冷間成型時に高
いグリーン密度が得られるという特徴があり、また、本
発明は、この粉末を、１ 、２００°〜１，３００’
ｃにおいて焼結することにより得られる焼結体をも特徴
とするものであり、この焼結体は、ＳｕＳ ４１０Ｌの
微粉末の有効な同相拡散と、低融点の電解銅粉末の液相
効果により、均質で高密度な焼結体であるという特徴が
あるものである。1 summer 1 hawk J1 bow 31 [1] In order to achieve this purpose, the present invention has developed JIS G430, which has a soft strength (1 ostenite structure and has excellent compressibility).
Similar to the powder of SUS 304L or SUS 316L according to 3, it has a soft ferrite structure and has a compressibility of 1
A precipitation hardening type stainless steel made by blending or diffusion bonding fine powder of excellent SUS 410L and low melting point electrolytic copper powder at a blending ratio such that the final composition becomes a martensitic precipitation hardening composition. This steel powder is characterized by a high green density that can be obtained during cold forming.
It is also characterized by a sintered body obtained by sintering at c. It is characterized by being a homogeneous and high-density sintered body.
実−」１−側御
以下、本発明をその実施例などに基づいて、詳細に説明
する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail based on embodiments thereof.
まず、本発明は、上記のように、ＪＩＳ Ｇ ４３０３
によるＳＵＳ ４１０Ｌの粉末２０〜６０％、電解銅粉
末１．５〜５．０％、残部がＪＩＳ Ｇ ４３０３によ
るＳＵＳ３０４Ｌの粉末を、最終組成がマルテンサイト
型析出硬化組成となｉように、Ｃ０．１０％以゛下、Ｓ
ｉ １．２％以下、Ｍｎ ０．４％以下、Ｃｒ １４
−１７％、Ｎｉ ３．５〜７．５％、Ｃｕ １．５
〜５．０％、残部Ｐｅから成るよにブレンド、又は、拡
散接合したことを特徴とする圧縮性に優れた析出硬化型
ステンレス鋼粉末、又は、ＪＩＳ Ｇ４３０３による５
ＯＳ４１０Ｌの粉末２０〜６０％、電解銅の粉末１．５
〜５．０％、残部がＪＩＳ Ｇ４３０３によるＳＵＳ
３１６Ｌの粉末を、最終組成がマルテンサイト型析出硬
化組成となるように、ｃ ｏ、ｉｏ％以下、Ｓｉ １．
２％以下、Ｍｎ ０．４％以下、Ｃｒ １４〜１７％、
旧 ３．５〜７．５％、Ｎｏ ０．５〜１．６％、Ｃ
ｕ １．５〜５．０％、残部Ｆｅから成るようにブレ
ンド、又は、拡散接合したことを特徴とする圧縮性に優
れた析出硬化型ステンレス鋼粉末を特徴とするものであ
り、また、本発明は、このような析出硬化型ステンレス
鋼粉末をプレス成型し、真空焼結し、焼き入れし、更に
、析出硬化して成る焼結体をも特徴とするものである
次ぎに、本発明の詳細な説明する。First, as mentioned above, the present invention complies with JIS G 4303
20 to 60% of SUS 410L powder according to JIS G 4303, 1.5 to 5.0% of electrolytic copper powder, and the balance SUS 304L powder according to JIS G 4303 were mixed with C0. 10% or less, S
i 1.2% or less, Mn 0.4% or less, Cr 14
-17%, Ni 3.5-7.5%, Cu 1.5
Precipitation hardening stainless steel powder with excellent compressibility characterized by being blended or diffusion bonded to consist of ~5.0% and the balance Pe, or 5 according to JIS G4303
20-60% OS410L powder, 1.5% electrolytic copper powder
~5.0%, the remainder is SUS according to JIS G4303
316L powder was mixed with less than co, io% and Si 1.3% so that the final composition was a martensitic precipitation hardening composition.
2% or less, Mn 0.4% or less, Cr 14-17%,
Old 3.5-7.5%, No 0.5-1.6%, C
It is characterized by a precipitation hardening type stainless steel powder with excellent compressibility, which is blended or diffusion bonded so that it consists of u 1.5 to 5.0% and the balance Fe. The invention is also characterized by a sintered body formed by press-molding, vacuum sintering, hardening, and precipitation hardening such precipitation hardening stainless steel powder. Detailed explanation.
まず、表１に示すような組成を有するＳＵＳ ３１６Ｌ
。First, SUS 316L having the composition shown in Table 1
.
ＳＵＳ ３０４Ｌ、 ＳＵＳ ４１０Ｌ及びＣｕの各粉
末を、表２に示すような配合率によりブレンドないしな
拡散接合し、それぞれ、同表に示すような、配合後の組
成を有する試料＾、Ｂ、Ｃ及びＤを調製した。なお、こ
の場合、拡散接合は、還元又は真空雰囲気中にお１１で
８００° 〜１ 、０００″Ｃで行った。また、従来材
としで、同表に示すように、１７−４ＰＦＩプレアロイ
粉末も調製したが、その組成は、同表に示すとおりであ
った。SUS 304L, SUS 410L, and Cu powders were blended or diffusion bonded according to the blending ratios shown in Table 2, and samples ^, B, C, and B, each having the composition after blending as shown in the same table, were prepared. D was prepared. In this case, diffusion bonding was carried out at 11 in a reducing or vacuum atmosphere at 800° to 1,000''C. In addition, as shown in the same table, 17-4 PFI prealloy powder was also used as the conventional material. The composition was as shown in the table.
表２から分かるように、本発明による析出型ステンレス
鋼粉末は、その最終組成は、マルテンサイト型析出硬化
組成となっているが、本発明鋼粉末の各試料＾、Ｂ、Ｃ
，Ｄ及び比較試料とに、潤滑剤として１％ステアリン酸
亜鉛を添加し、６ｔ／Ｃｌ１１２の圧力の下にプレス成
型し、１，２００” 〜１，３００’ Ｃにおいで真空
焼結し、焼き入れし更に、析出硬化処理を施したものに
ついての試験結果が、表３に示されている。As can be seen from Table 2, the final composition of the precipitation-type stainless steel powder according to the present invention is a martensitic precipitation-hardening composition, but each sample of the steel powder according to the present invention ^, B, C
, D and the comparative sample, 1% zinc stearate was added as a lubricant, press molded under a pressure of 6t/Cl112, vacuum sintered at 1,200'' to 1,300'C, and sintered. Table 3 shows the test results for those which were filled and then subjected to precipitation hardening treatment.
枳シ
表３から分かるよ、本発明による析出硬化型ステンレス
鋼粉末を成型、焼結、析出硬化処理を施した焼結体は、
比較試料に比べ、冷開成型時のグリーン密度、焼結密度
が大きいだけではなく、硬度も高く、無論、耐食性にも
優れでいる。As can be seen from Table 3, the sintered body obtained by molding, sintering, and precipitation hardening the precipitation hardening stainless steel powder according to the present invention has the following properties:
Compared to the comparative sample, it not only has a higher green density and sintered density during cold-open molding, but also higher hardness and, of course, excellent corrosion resistance.
＝７−
表１
Ｄｔに”＃ １：ｑ フ１５１［２１５１１７表２（１
）
表２（２）
表３
注：１．密度の単位はｇｒ／Ｃｌ１１３である。=7- Table 1 Dt "# 1:q F151 [215117 Table 2 (1
) Table 2 (2) Table 3 Notes: 1. The unit of density is gr/Cl113.
２．硬さは、焼結後のものである。2. Hardness is after sintering.
３、耐食性は、試料を３０’ Ｃの１０％■Ｃ１溶液の
中に浸漬した場合における試料の減量をｇ／ｍ２／ｈの
単位で現したものである。3. Corrosion resistance is the weight loss of a sample in g/m2/h when the sample is immersed in a 10% ■C1 solution at 30'C.
発」し１タリＦ
以上のように、本発明による析出硬化型ステンレス鋼粉
末は、例えば、これによって作られた焼結体は、グリー
ン密度及び焼結密度が高いので、例えば、腕時計のケー
ス、内燃機関用耐熱耐摩部品などの素材として、最適の
ものを提供するもにである。As described above, the precipitation hardening stainless steel powder according to the present invention has a high green density and a high sintered density. We provide the best material for heat-resistant and wear-resistant parts for internal combustion engines.
Claims (1)
末２０〜６０％、電解銅粉末１．５〜５．０％、残部が
ＪＩＳ Ｇ ４３０３によるＳＵＳ ３０４Ｌの粉末を
、最終組成がマルテンサイト型析出硬化組成となるよう
に、Ｃ０．１０％以下、Ｓｉ１．２％以下、Ｍｎ０．４
％以下、Ｃｒ１４〜１７％、Ｎｉ３．５〜７．５％、Ｃ
ｕ１．５〜５．０％、残部Ｆｅから成るようにブレンド
したことを特徴とする圧縮性に優れた析出硬化型ステン
レス鋼粉末。 ２、ＳＵＳ ４１０Ｌの粉末の粒径を３５０メッシュ以
下、ＳＵＳ ３０４Ｌの粉末の粒径を１００メッシュ以
下に選択した特許請求の範囲第１項記載の圧縮性に優れ
た析出硬化型ステンレス鋼粉末。 ３、ＳＵＳ ４１０Ｌの粉末の粒径を２０μｍ以下とし
た特許請求の範囲第２項記載の圧縮性に優れた析出硬化
型ステンレス鋼粉末。 ４、各粉末を、還元、又は、真空雰囲気中において、８
００°〜１，２００℃において拡散接合することによっ
て所定の成分とした特許請求の範囲第１、２又は３項記
載の圧縮性に優れた析出硬化型ステンレス鋼粉末。 ５、ＪＩＳ Ｇ４３０３によるＳＵＳ ４１０Ｌの粉末
２０〜６０％、電解銅の粉末１．５〜５．０％、残部が
ＪＩＳ Ｇ４３０３によるＳＵＳ ３１６Ｌの粉末を、
最終組成がマルテンサイト型析出硬化組成となるように
、Ｃ０．１０％以下、Ｓｉ１．２％以下、Ｍｎ０．４％
以下、Ｃｒ１４〜１７％、Ｎｉ３．５〜７．５％、Ｍｏ
０．５〜１．６％、Ｃｕ１．５〜５．０％、残部Ｆｅか
ら成るようにブレンドしたことを特徴とする圧縮性に優
れた析出硬化型ステンレス鋼粉末。 ６、ＳＵＳ ４１０Ｌの粉末の粒径を３５０メッシュ以
下、ＳＵＳ ３１６Ｌの粉末の粒径を１００メッシュ以
下に選択した特許請求の範囲第５項記載の圧縮性に優れ
た析出硬化型ステンレス鋼粉末。 ７、ＳＵＳ ４１０Ｌの粉末の粒径を２０μｍ以下とし
た特許請求の範囲第６項記載の圧縮性に優れた析出硬化
型ステンレス鋼粉末。 ８、各粉末を、還元、又は、真空雰囲気中において、８
００°〜１，２００℃において拡散接合することによっ
て所定の成分とした特許請求の範囲第５、６又は７項記
載の圧縮性に優れた析出硬化型ステンレス鋼粉末。 ９、ＪＩＳ Ｇ ４３０３によるＳＵＳ ４１０Ｌの粉
末２０〜６０％、電解銅粉末１．５〜５．０％、残部が
ＪＩＳ Ｇ ４３０３によるＳＵＳ ３０４Ｌの粉末を
、最終組成がマルテンサイト型析出硬化組成となるよう
に、Ｃ０．１０％以下、Ｓｉ１．２％以下、Ｍｎ０．４
％以下、Ｃｒ１４〜１７％、Ｎｉ３．５〜７．５％、Ｃ
ｕ１．５〜５．０％、残部Ｆｅから成るよにブレンドし
た後、これをプレス成型し、真空焼結し、焼き入れし、
更に、祈出硬化して成ることを特徴とする焼結体。 １０、ＪＩＳ Ｇ４３０３によるＳＵＳ ４１０Ｌの粉
末２０〜６０％、電解銅の粉末１．５〜５．０％、残部
がＪＩＳ Ｇ４３０３によるＳＵＳ ３１６Ｌの粉末を
、最終組成がマルテンサイト型析出硬化組成となるよう
に、Ｃ０．１０％以下、Ｓｉ１．２％以下、Ｍｎ０．４
％以下、Ｃｒ１４〜１７％、Ｎｉ３．５〜７．５％、Ｍ
ｏ０．５〜１．６％、Ｃｕ１．５〜５．０％、残部Ｆｅ
から成るようにブレンドした後、これをプレス成型し、
真空焼結し、焼き入れし、更に、析出硬化して成ること
を特徴とする焼結体。[Claims] 1. 20 to 60% of SUS 410L powder according to JIS G 4303, 1.5 to 5.0% of electrolytic copper powder, and the balance SUS 304L powder according to JIS G 4303, with a final composition of martensite. To obtain a mold precipitation hardening composition, C0.10% or less, Si1.2% or less, Mn0.4
% or less, Cr14-17%, Ni3.5-7.5%, C
Precipitation hardening stainless steel powder with excellent compressibility characterized by being blended to consist of u1.5 to 5.0% and the balance Fe. 2. Precipitation hardening stainless steel powder with excellent compressibility according to claim 1, wherein the particle size of the SUS 410L powder is selected to be 350 mesh or less, and the particle size of the SUS 304L powder is selected to be 100 mesh or less. 3. Precipitation hardening stainless steel powder with excellent compressibility as claimed in claim 2, wherein the SUS 410L powder has a particle size of 20 μm or less. 4. Each powder is reduced or in a vacuum atmosphere, 8
Precipitation hardening stainless steel powder with excellent compressibility according to claim 1, 2 or 3, which is made into a predetermined component by diffusion bonding at 00° to 1,200°C. 5. 20-60% of SUS 410L powder according to JIS G4303, 1.5-5.0% of electrolytic copper powder, the balance is SUS 316L powder according to JIS G4303,
To make the final composition a martensitic precipitation hardening composition, C0.10% or less, Si1.2% or less, Mn0.4%.
Below, Cr14-17%, Ni3.5-7.5%, Mo
A precipitation-hardening stainless steel powder with excellent compressibility characterized by being blended to consist of 0.5-1.6% Cu, 1.5-5.0% Cu, and the balance Fe. 6. Precipitation hardening stainless steel powder with excellent compressibility according to claim 5, wherein the particle size of the SUS 410L powder is selected to be 350 mesh or less, and the particle size of the SUS 316L powder is selected to be 100 mesh or less. 7. Precipitation hardening stainless steel powder with excellent compressibility as claimed in claim 6, wherein the SUS 410L powder has a particle size of 20 μm or less. 8. Each powder is reduced or in a vacuum atmosphere, 8.
Precipitation hardening stainless steel powder with excellent compressibility according to claim 5, 6 or 7, which is made into a predetermined component by diffusion bonding at 00° to 1,200°C. 9. 20-60% of SUS 410L powder according to JIS G 4303, 1.5-5.0% of electrolytic copper powder, the balance is SUS 304L powder according to JIS G 4303, the final composition is a martensitic precipitation hardening composition. As such, C0.10% or less, Si1.2% or less, Mn0.4
% or less, Cr14-17%, Ni3.5-7.5%, C
After blending to consist of u1.5 to 5.0% and the balance Fe, this was press-molded, vacuum sintered, and quenched.
Furthermore, a sintered body characterized by being formed by dry hardening. 10. 20 to 60% of SUS 410L powder according to JIS G4303, 1.5 to 5.0% of electrolytic copper powder, and the balance SUS 316L powder according to JIS G4303, so that the final composition is a martensitic precipitation hardening composition. , C0.10% or less, Si1.2% or less, Mn0.4
% or less, Cr14-17%, Ni3.5-7.5%, M
o0.5-1.6%, Cu1.5-5.0%, balance Fe
After blending to consist of, this is press-molded,
A sintered body characterized by being vacuum sintered, quenched, and then precipitation hardened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59148626A JPS6130601A (en) | 1984-07-19 | 1984-07-19 | Deposition hardening type stainless steel powder having excellent compressibility and sintered body thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59148626A JPS6130601A (en) | 1984-07-19 | 1984-07-19 | Deposition hardening type stainless steel powder having excellent compressibility and sintered body thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6130601A true JPS6130601A (en) | 1986-02-12 |
| JPH0158241B2 JPH0158241B2 (en) | 1989-12-11 |
Family
ID=15456989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59148626A Granted JPS6130601A (en) | 1984-07-19 | 1984-07-19 | Deposition hardening type stainless steel powder having excellent compressibility and sintered body thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6130601A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0257606A (en) * | 1988-08-20 | 1990-02-27 | Kawasaki Steel Corp | Stainless steel fine powder and sintering material |
| EP0499392A2 (en) * | 1991-02-14 | 1992-08-19 | Nissan Motor Company, Ltd. | Method for producing a wear-resistant iron-based sintered alloy |
| JP2010138455A (en) * | 2008-12-11 | 2010-06-24 | Diamet:Kk | Stainless steel sintered compact and manufacturing method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5429285A (en) * | 1977-08-08 | 1979-03-05 | Kanagawa Prefecture | Method of etching material for craftwork |
-
1984
- 1984-07-19 JP JP59148626A patent/JPS6130601A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5429285A (en) * | 1977-08-08 | 1979-03-05 | Kanagawa Prefecture | Method of etching material for craftwork |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0257606A (en) * | 1988-08-20 | 1990-02-27 | Kawasaki Steel Corp | Stainless steel fine powder and sintering material |
| EP0499392A2 (en) * | 1991-02-14 | 1992-08-19 | Nissan Motor Company, Ltd. | Method for producing a wear-resistant iron-based sintered alloy |
| JP2010138455A (en) * | 2008-12-11 | 2010-06-24 | Diamet:Kk | Stainless steel sintered compact and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0158241B2 (en) | 1989-12-11 |
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