JPH0158241B2 - - Google Patents
Info
- Publication number
- JPH0158241B2 JPH0158241B2 JP59148626A JP14862684A JPH0158241B2 JP H0158241 B2 JPH0158241 B2 JP H0158241B2 JP 59148626 A JP59148626 A JP 59148626A JP 14862684 A JP14862684 A JP 14862684A JP H0158241 B2 JPH0158241 B2 JP H0158241B2
- Authority
- JP
- Japan
- Prior art keywords
- powder
- sus
- less
- precipitation hardening
- stainless 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
Links
- 239000000843 powder Substances 0.000 claims description 33
- 238000004881 precipitation hardening Methods 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 16
- 229910001220 stainless steel Inorganic materials 0.000 claims description 13
- 239000010935 stainless steel Substances 0.000 claims description 13
- 238000009792 diffusion process Methods 0.000 claims description 10
- 229910000734 martensite Inorganic materials 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims 1
- 238000002156 mixing Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910001035 Soft ferrite Inorganic materials 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000000126 substance Substances 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
Description
産業上の利用分野
本発明は、圧縮性に優れた析出硬化型ステンレ
ス鋼粉末に関するものである。
従来の技術
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、GIS
Ｇ 4303によつて規定されているSUS 631（17−
4PH）（Ｃ 0.05％、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。
しかしながら、このような化学成分を有するプ
レアロイ粉末は、
(1) 粉末自体の組織がマルテンサイトであり、硬
いために、冷間成型時のグリーン密度が低いこ
と
(2) 通常の焼結温度（1300℃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
などの問題点があつた。
発明が解決しようとする問題点
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
ステンレス鋼粉末を得ることを、その目的とする
ものである。
問題点を解決するための手段
本発明は、この目的を達成するために、軟かい
オーステナイト組織を有し、圧縮性に優れたJIS
Ｇ 4303によるSUS 304L、又はSUS 316Lの粉
末と、同様に軟かいフエライト組織を持ち、圧縮
性に優れたSUS 410Lの微粉末と、低融点の電解
銅粉末とを、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、
必要に応じて拡散接合した析出硬化型ステンレス
鋼粉末を特徴とするものである。なお、この拡散
接合をする場合には、拡散接合の処理後の各成分
が上記所定の成分量含まれている必要がある。
この発明の鋼粉末は、冷間成型において高いグ
リーン密度が得られ、さらに1200〜1300℃におい
て焼結すれば、SUS 410Lの微粉末の有効な固相
拡散と、低融点の電解銅粉末の液相効果により、
均質で高密度の焼結体を得ることができる。
実施例
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。
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、Ｃ 0.10％以下、Si 1.2％以下、
Mn 0.4％以下、Cr 14〜17％、Ni 3.5〜7.5％、
Cu 1.5〜5.0％、残部 Feから成るようにブレン
ドし、必要により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 Ｇ 4303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、Ｃ 0.10％
以下、Si 1.2％以下、Mn 0.4％以下、Cr 14〜17
％、Ni 3.5〜7.5％、Mo 0.5〜1.6％、Cu 1.5〜
5.0％、残部Feから成るようにブレンドし、必要
により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
のである。なお、SUS 410Lの粉末は粒径が350
メツシユ以下、または20μm以下、SUS 304Lの
の粉末は粒径が100メツシユ以下のものが好まし
い。
なお、本発明の析出硬化型ステンレス鋼粉末
は、プレス成型、真空焼結、焼き入れ、析出硬化
の各処理を施すことによつて焼結体となし得るも
のである。
次ぎに、本発明の実施例を説明する。
まず、表１に示すような組成を有するSUS
316L、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およ
びブレンド後拡散接合し、それぞれ、同表に示す
ような、配合後の組成を有する試料Ａ、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いて800゜〜1000℃で行
つた。また、従来材として、同表に示すように、
17−4PH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つた。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
組成となつているが、本発明鋼粉末の各試料Ａ、
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／cm2の圧力の下に
プレス成型し、1200゜〜1300℃において真空焼結
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。
表３から分かるように、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、冷間成型時
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、耐食性にも優れている。
INDUSTRIAL APPLICATION FIELD The present invention relates to precipitation hardening stainless steel powder with excellent compressibility. Conventional technology In the field of sintered stainless steel, which requires hardness and corrosion resistance, GIS has generally been used.
SUS 631 (17-
4PH) (C 0.05%, Cr 17%, Ni 4%, Cu 4
%, balance Fe) is used. However, pre-alloyed powders with such chemical components suffer from the following problems: (1) The structure of the powder itself is martensite, which is hard, resulting in a low green density during cold molding. ℃ or below),
There were problems such as no liquid phase was observed and high sintered density could not be obtained. Problems to be Solved by the Invention Therefore, an object of the present invention is to obtain a precipitation-hardening stainless steel powder that has excellent cold compressibility and can obtain high density by ordinary sintering. It is. Means for Solving the Problems In order to achieve this object, the present invention has developed a JIS material having a soft austenite structure and excellent compressibility.
SUS 304L or SUS 316L powder produced by G 4303, SUS 410L fine powder that also has a soft ferrite structure and excellent compressibility, and low melting point electrolytic copper powder are combined into martensitic precipitation in the final composition. Blend at a blending ratio that will result in a cured composition,
It features precipitation-hardened stainless steel powder that is optionally diffusion bonded. In addition, when performing this diffusion bonding, it is necessary that each component after the diffusion bonding process is contained in the above-mentioned predetermined amount. The steel powder of this invention has a high green density when cold formed, and when sintered at 1200 to 1300℃, effective solid phase diffusion of SUS 410L fine powder and liquid state of low melting point electrolytic copper powder can be achieved. Due to the phase effect,
A homogeneous and high-density sintered body can be obtained. Examples Hereinafter, the present invention will be described in detail based on examples thereof. First, as mentioned above, the present invention complies with JIS G 4303
SUS 410L powder 20~60%, electrolytic copper powder 1.5% by
~5.0%, the balance is SUS 304L powder according to JIS G 4303, C 0.10% or less, Si 1.2% or less, so that the final composition is a martensitic precipitation hardening composition.
Mn 0.4% or less, Cr 14-17%, Ni 3.5-7.5%,
Precipitation hardening stainless steel powder with excellent compressibility characterized by blending 1.5 to 5.0% Cu and the balance Fe and diffusion bonding if necessary, or SUS 410L powder 20 to 60 according to JIS G 4303.
%, electrolytic copper powder 1.5-5.0%, the balance is JIS G4303
SUS 316L powder was mixed with C 0.10% so that the final composition was a martensitic precipitation hardening composition.
Below, Si 1.2% or less, Mn 0.4% or less, Cr 14-17
%, Ni 3.5~7.5%, Mo 0.5~1.6%, Cu 1.5~
It is characterized by a precipitation-hardening stainless steel powder with excellent compressibility, which is blended so that it consists of 5.0% and the balance Fe, and is diffusion bonded if necessary. In addition, the particle size of SUS 410L powder is 350
The particle size of the SUS 304L powder is preferably 100 mesh or less, or 20 μm or less. The precipitation hardening stainless steel powder of the present invention can be made into a sintered body by subjecting it to press molding, vacuum sintering, quenching, and precipitation hardening. Next, examples of the present invention will be described. First, SUS with the composition shown in Table 1
316L, SUS 304L, SUS 410L, and Cu powders were blended and blended and then diffusion bonded using the blending ratios shown in Table 2 to produce samples A and B, each having the composition after blending as shown in the same table. , C and D were prepared. In this case, diffusion bonding is
It was carried out at 800° to 1000°C in a reducing or vacuum atmosphere. In addition, as shown in the same table, as conventional materials,
A 17-4PH prealloy powder was also prepared, and its composition was as shown in the same table. 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 A of the steel powder according to the present invention,
1% as a lubricant to B, C, D and comparative samples.
The test results for products added with zinc stearate, press-molded under a pressure of 6t/ cm2 , vacuum sintered at 1200° to 1300°C, quenched, and subjected to precipitation hardening treatment are shown in the table below. 3. 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 a green density and a sintered density during cold forming compared to the comparative sample. Not only is it large, but it also has high hardness and, of course, excellent corrosion resistance.
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】
発明の効果
以上のように、本発明による析出硬化型ステン
レス鋼粉末から作られる焼結体は、冷間成型時の
グリーン密度および焼結後の焼結密度が高いの
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、最適のものである。[Table] Effects of the Invention As described above, the sintered body made from the precipitation hardening stainless steel powder according to the present invention has a high green density during cold molding and a high sintered density after sintering, so it can be used, for example, in wristwatches. It is ideal as a material for cases, heat-resistant and wear-resistant parts for internal combustion engines, etc.
Claims (1)
％、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、Ｃ 0.10％
以下、Si 1.2％以下、Mn 0.4％以下、Cr 14〜17
％、Ni 3.5〜7.5％、Cu 1.5〜5.0％、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 ブレンド後の各粉末を、還元、又は、真空雰
囲気中において、800゜〜1200℃において拡散接合
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 JIS Ｇ 4303によるSUS 410Lの粉末20〜60
％、電解銅の粉末1.5〜5.0％、残部がJIS Ｇ
4303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
0.10％以下、Si 1.2％以下、Mn 0.4％以下、Cr
14〜17％、Ni 3.5〜7.5％、Mo 0.5〜1.6％、Cu
1.5〜5.0％、残部Feから成るようにブレンドした
ことを特徴がとする圧縮性に優れた析出硬化型ス
テンレス鋼粉末。 ４ ブレンド後の各粉末を、還元、又は、真空雰
囲気中において、800゜〜1200℃において拡散接合
した特許請求の範囲第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。[Claims] 1 SUS 410L powder 20 to 60 according to JIS G 4303
%, electrolytic copper powder 1.5-5.0%, the balance JIS G 4303
SUS 304L powder was mixed with C 0.10% so that the final composition was a martensitic precipitation hardening composition.
Below, Si 1.2% or less, Mn 0.4% or less, Cr 14-17
%, Ni 3.5 to 7.5%, Cu 1.5 to 5.0%, and the balance Fe. 2. Precipitation hardening stainless steel powder with excellent compressibility as claimed in claim 1, wherein the blended powders are reduced or diffusion bonded at 800° to 1200°C in a vacuum atmosphere. 3 SUS 410L powder 20-60 according to JIS G 4303
%, electrolytic copper powder 1.5-5.0%, the balance is JIS G
SUS 316L powder produced by 4303 was treated with C so that the final composition became a martensitic precipitation hardening composition.
0.10% or less, Si 1.2% or less, Mn 0.4% or less, Cr
14-17%, Ni 3.5-7.5%, Mo 0.5-1.6%, Cu
Precipitation hardening stainless steel powder with excellent compressibility, characterized by being blended to consist of 1.5 to 5.0% Fe with the balance being Fe. 4. Precipitation hardening stainless steel powder with excellent compressibility according to claim 3, wherein the blended powders are reduced or diffusion bonded at 800° to 1200°C in a vacuum atmosphere.
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 JPS6130601A (en) | 1986-02-12 |
| JPH0158241B2 true 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) |
Families Citing this family (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 |
| JPH04259351A (en) * | 1991-02-14 | 1992-09-14 | Nissan Motor Co Ltd | Manufacture of wear resistant ferrous sintered alloy |
| JP5446237B2 (en) * | 2008-12-11 | 2014-03-19 | 株式会社ダイヤメット | Manufacturing method of sintered stainless steel |
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 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6130601A (en) | 1986-02-12 |
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