JP3224417B2 - Alloy steel powder and sintered body for sintered body having high strength, high fatigue strength and high toughness - Google Patents
Alloy steel powder and sintered body for sintered body having high strength, high fatigue strength and high toughnessInfo
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- JP3224417B2 JP3224417B2 JP12793992A JP12793992A JP3224417B2 JP 3224417 B2 JP3224417 B2 JP 3224417B2 JP 12793992 A JP12793992 A JP 12793992A JP 12793992 A JP12793992 A JP 12793992A JP 3224417 B2 JP3224417 B2 JP 3224417B2
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- Prior art keywords
- sintered body
- strength
- alloy steel
- less
- fatigue strength
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Description
【０００１】[0001]
【産業上の利用分野】この発明は、高強度、高疲労強度
および高靱性が要求される焼結体用合金鋼粉および焼結
体に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alloy steel powder for a sintered body and a sintered body which require high strength, high fatigue strength and high toughness.
【０００２】[0002]
【従来の技術】焼結材は、溶製材に比較してコスト的に
有利であり、自動車用部品、ＯＡ機器用部品などに広く
用いられている。しかしながら、焼結材には空孔が存在
することなどから強度、疲労強度および靱性が低いとい
う欠点を有している。したがって、焼結材の用途を拡大
するうえからも強度、疲労強度および靱性の向上を図る
ことが肝要である。2. Description of the Related Art Sintered materials are more advantageous in cost than ingot materials and are widely used for parts for automobiles and parts for OA equipment. However, the sintered material has a drawback that strength, fatigue strength and toughness are low due to the presence of voids and the like. Therefore, it is important to improve the strength, the fatigue strength, and the toughness in expanding the use of the sintered material.
【０００３】焼結材料の強度向上をはかるため、Cr-Mn
系合金鋼粉（特公昭58-10962号公報）が用いられてき
た。Cr、Mnは焼入性が高いため、熱処理後の強度が高く
なるという長所があるが、易酸化性元素であるため、Cr
-Mn 複合酸化物を生成し、疲労強度および靱性を低下さ
せる欠点がある。本出願人はすでに、Mnを低減し、Nb、
Ｖを添加したCr系合金鋼粉（特願平２−285982号）を開
発している。しかしながら、これは、Nb、Ｖの炭窒化物
析出強化機構によって焼結体強度を高めているため、炭
窒化物が破壊の起点となり、疲労強度および靱性を低下
させる欠点があることが本発明者らの研究により明らか
になった。[0003] In order to improve the strength of sintered materials, Cr-Mn
Series alloy steel powder (JP-B-58-10962) has been used. Cr and Mn have the advantage of high strength after heat treatment because of their high hardenability.However, Cr and Mn are easily oxidizable elements.
-Mn There is a disadvantage in that a composite oxide is formed and the fatigue strength and toughness are reduced. Applicants have already reduced Mn, Nb,
We are developing Cr-based alloy steel powder to which V is added (Japanese Patent Application No. 2-285982). However, this is because the strength of the sintered body is enhanced by the carbonitride precipitation strengthening mechanism of Nb and V, so that the carbonitride becomes a starting point of fracture, and there is a disadvantage that the fatigue strength and toughness are reduced. These studies have revealed this.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、このような
従来の焼結材料の問題点を解決し、高強度、高疲労強度
および高靱性を達成する焼結体用合金鋼粉および焼結体
を提供することを目的とするものである。SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of conventional sintered materials, and provides an alloy steel powder for a sintered body and a sintered body which achieves high strength, high fatigue strength and high toughness. It is intended to provide the body.
【０００５】[0005]
【課題を解決するための手段】本発明は、重量％にて、
Ｃ： 0.1％以下、Mn：0.08％以下、Cr： 0.5〜３％、M
o： 0.1〜２％、Ｓ：0.01％以下、Ｐ：0.01％以下、
Ｏ： 0.2％以下を含有し、残部は不可避的不純物および
Feからなることを特徴とする高強度、高疲労強度および
高靱性を有する焼結体用合金鋼粉であり、また本発明
は、重量％にて、Ｃ：0.2〜1.2 ％、Mn：0.08％以下、C
r： 0.5〜３％、Mo： 0.1〜２％、Ｓ：0.01％以下、
Ｐ：0.01％以下、Ｏ： 0.2％以下を含有し、残部は不可
避的不純物およびFeからなることを特徴とする高強度、
高疲労強度および高靱性を有する焼結体である。SUMMARY OF THE INVENTION The present invention provides, in weight percent,
C: 0.1% or less, Mn: 0.08% or less, Cr: 0.5-3%, M
o: 0.1 to 2%, S: 0.01% or less, P: 0.01% or less,
O: contains 0.2% or less, the remaining portion is unavoidable impurities and
An alloy steel powder for a sintered body having high strength, high fatigue strength, and high toughness characterized by being made of Fe. The present invention also provides, in terms of% by weight, C: 0.2 to 1.2% and Mn: 0.08% Below, C
r: 0.5-3%, Mo: 0.1-2%, S: 0.01% or less,
P: 0.01% or less, O: contains 0.2% or less, the remaining portion is a high strength, characterized in that the unavoidable impurities and Fe,
It is a sintered body having high fatigue strength and high toughness.
【０００６】なお、本発明の合金鋼粉は、上記組成に調
整した溶鋼を水アトマイズすることにより容易に製造す
ることができる。また本発明の焼結体は、本発明の合金
鋼粉に目標量の黒鉛粉を加え、さらにステアリン酸亜鉛
粉等の潤滑剤を添加混合したのち、圧縮成形したのち、
焼結することにより容易に製造することができる。ま
た、この焼結体にさらに浸炭処理を行い、引き続き油焼
入れしたのち焼戻し処理を施すこともできる。[0006] The alloy steel powder of the present invention can be easily produced by subjecting molten steel adjusted to the above composition to water atomization. Further, the sintered body of the present invention, after adding a target amount of graphite powder to the alloy steel powder of the present invention, further adding and mixing a lubricant such as zinc stearate powder, after compression molding,
It can be easily manufactured by sintering. Further, the sintered body may be further carburized, followed by oil quenching and then tempering.
【０００７】[0007]
【作用】この発明の合金鋼粉ならびに焼結体の成分限定
理由を以下に述べる。 Ｃ：0.1 ％以下（合金鋼粉） Ｃは鋼中に侵入型に固溶してフェライト地を硬化させる
元素である。0.1 重量％は（以下単に％と記す）を超え
て含有させると粉末の硬化が著しくなり、圧縮性が低下
する。したがって、その含有量は0.1 ％以下とする。The reasons for limiting the components of the alloy steel powder and sintered body of the present invention will be described below. C: 0.1% or less (alloy steel powder) C is an element curing the full E write locations in solid solution in interstitial in the steel. If the content exceeds 0.1% by weight (hereinafter simply referred to as "%"), the powder hardens remarkably and the compressibility decreases. Therefore, its content should be 0.1% or less.
【０００８】Ｃ： 0.2〜1.2 ％（焼結体） Ｃは、鋼の強度を向上させる元素であるが、これらの効
果を得るためには焼結体中の含有量は0.2 ％以上を必要
とする。しかし、1.2 ％を超えるとセメンタイトが析出
し、強度、靱性を低下させる。したがって、その含有量
は0.2 〜1.2 ％とする。添加方法は、黒鉛粉を混合した
り、浸炭熱処理を施したりして焼結体中に残存させる。
浸炭熱処理した場合、焼結体内にＣ量分布があるが、総
量で請求範囲内であればよい。C: 0.2 to 1.2% (sintered body) C is an element for improving the strength of steel, but in order to obtain these effects, the content in the sintered body needs to be 0.2% or more. I do. However, when the content exceeds 1.2%, cementite precipitates and lowers the strength and toughness. Therefore, its content should be 0.2-1.2%. As an addition method, graphite powder is mixed or subjected to a carburizing heat treatment so as to remain in the sintered body.
When the carburizing heat treatment is performed, there is a C content distribution in the sintered body, but the total amount may be within the claims.
【０００９】次に以下に述べる成分は合金鋼粉ならびに
焼結体に共通に適用される。 Mn：0.08％以下 Mnは、焼入性向上、固溶強化などによって、鋼の強度を
向上させるが、0.08％を超えて含有させると酸化物の生
成が多くなり、これが破壊の起点となって、疲労強度お
よび靱性を低下させる。したがって、その含有量は0.08
％以下とする。The components described below are commonly applied to alloy steel powder and sintered bodies. Mn: 0.08% or less Mn improves the strength of steel by improving hardenability, solid solution strengthening, etc. However, when it exceeds 0.08%, the generation of oxides increases, and this becomes the starting point of fracture. Lowers fatigue strength and toughness. Therefore, its content is 0.08
% Or less.
【００１０】Cr： 0.5〜３％ Crは、焼入性を向上させて、引張強度および疲労強度を
向上させ、さらに熱処理後の硬さを高め耐摩耗性を向上
させる効果がある。これらの効果を得るためには含有量
は 0.5％以上を必要とする。しかし、焼結体は粉末を素
材とするため３％を超えて含有させると酸化物の生成が
多くなり、これが疲労破壊の起点となって、疲労強度を
低下させる。したがって、その含有量は 0.5〜３％とす
る。Cr: 0.5-3% Cr has the effect of improving hardenability, improving tensile strength and fatigue strength, and further increasing hardness after heat treatment and improving wear resistance. To obtain these effects, the content needs to be 0.5% or more. However, since the sintered body is made of a powder, if the content exceeds 3%, the generation of oxides increases, and this becomes the starting point of fatigue fracture, which lowers the fatigue strength. Therefore, its content should be 0.5-3%.
【００１１】Mo： 0.1〜２％ Moは、焼入性向上、固溶強化、析出強化などによって、
鋼の強度を向上させるが、含有量が 0.1％未満であると
その効果は小さく、２％を超えると靭性が低下する。し
たがって、その含有量は 0.1〜２％とする。 Ｓ：0.01％以下 Ｓの低減はこの発明の特徴の一つであるが、Mnを0.08％
以下にすることによって、MnＳが減少し固溶Ｓが増加す
る。Ｓの含有量が0.01％を超えると固溶Ｓが増え、粒界
強度が低下する。したがって、その含有量は0.01％以下
とする。Mo: 0.1 to 2% Mo is used for improving hardenability, solid solution strengthening, and precipitation strengthening.
Although the strength of the steel is improved, the effect is small when the content is less than 0.1%, and the toughness is reduced when the content exceeds 2%. Therefore, the content is set to 0.1 to 2%. S: 0.01% or less Reduction of S is one of the features of the present invention.
By doing so, MnS decreases and solute S increases. If the S content exceeds 0.01%, the amount of solid solution S increases, and the grain boundary strength decreases. Therefore, its content is set to 0.01% or less.
【００１２】Ｐ：0.01％以下 Ｐの低減はこの発明の特徴の一つであるが、Mn、Ｓの含
有量が多いときは靭性に影響を及ぼさないが、Mnが0.08
％以下、Ｓが0.01％以下のときは、Ｐを0.01％以下にす
ることによって、粒界強度が増加し、靭性が向上する。
したがって、その含有量は0.01％以下とする。 Ｏ:0.2％以下 Ｏは、焼結体の機械的特性に大きな影響を及ぼす元素
で、低ければ低いほど良く0.05％以下が好ましい。一
方、含有量が 0.2％を超えると多量の酸化物が生成され
る。したがって、その含有量は 0.2％以下とする。P: 0.01% or less The reduction of P is one of the features of the present invention. When the content of Mn and S is large, it does not affect the toughness.
% And S is 0.01% or less, by setting P to 0.01% or less, the grain boundary strength is increased and the toughness is improved.
Therefore, its content is set to 0.01% or less. O: 0.2% or less O is an element that has a great effect on the mechanical properties of the sintered body. On the other hand, if the content exceeds 0.2%, a large amount of oxide is generated. Therefore, its content should be 0.2% or less.
【００１３】[0013]
【００１４】本発明では、以上のように合金鋼粉ならび
に焼結体の組成を限定したので、焼結体としたとき靱性
の向上がはかれ、また、疲労破壊の起点が少ないものが
でき、その結果、疲労強度の向上がはかれた。また引張
り強度の向上はCr、Mo等を含有させていることにより十
分達成されている。In the present invention, since the composition of the alloy steel powder and the sintered body is limited as described above, the toughness is improved when the sintered body is used, and the starting point of fatigue fracture can be reduced. As a result, the fatigue strength was improved. Further, the improvement in tensile strength has been sufficiently achieved by including Cr, Mo, and the like.
【００１５】[0015]
実施例１ 化学成分組成を種々に変化させて、水アトマイズ法にて
製造し、仕上還元した後の表１に示す合金鋼粉に、黒鉛
粉：0.15重量％およびステアリン酸亜鉛粉：１重量％を
添加混合したのち、圧縮成形により、密度：7.10ｇ／cm
3 の成形体を作製した。これらの成形体を窒素雰囲気
中、1250℃、60分間の条件での焼結を行ったのち、 890
℃で 120分間の浸炭処理（雰囲気のカーボンポテンシャ
ル： 0.9％）に続いて油焼入れしたのち、 150℃で60分
間の焼戻し処理を施した。このようにして得られた浸炭
熱処理焼結体について、引張強さ、耐久疲れ強さならび
にシャルピー衝撃値を調べた。これらの実験結果を表２
に示す。この表から明らかなようにこの発明の適合例は
すべて引張強さ、耐久疲れ強さ、シャルピー衝撃値とも
それぞれ125kgf/mm2、45kgf/mm2 、1.0kgf・m/cm2 以上
と良好な値を示している。なお、耐久疲れ強さは、小野
式回転曲げ試験機を用い、応力−繰り返し数曲線より求
めた107 回の繰り返し数を示す応力とした。またシャル
ピー衝撃値はノッチなしで室温で試験した。Example 1 The alloy steel powder shown in Table 1 after being manufactured by a water atomizing method with various changes in the chemical component composition and subjected to finish reduction was added to graphite powder: 0.15% by weight and zinc stearate powder: 1% by weight. Is added and mixed, and then subjected to compression molding to obtain a density of 7.10 g / cm.
A molded product of No. 3 was produced. After sintering these compacts in a nitrogen atmosphere at 1250 ° C for 60 minutes,
After carburizing treatment (carbon potential of atmosphere: 0.9%) at 120 ° C for 120 minutes, oil quenching was performed, followed by tempering treatment at 150 ° C for 60 minutes. The thus obtained carburized heat-treated sintered body was examined for tensile strength, durability fatigue strength and Charpy impact value. Table 2 shows the results of these experiments.
Shown in All adaptations tensile strength of apparent this invention from this table, endurance fatigue strength, respectively Charpy impact value and also 125kgf / mm 2, 45kgf / mm 2, 1.0kgf · m / cm 2 or more and a good value Is shown. Incidentally, the durability fatigue strength, using the Ono-type rotary bending test machine, the stress - and the stress that indicates the number of repetitions of 10 7 times determined from the number of repetitions curve. Charpy impact values were also tested at room temperature without notch.
【００１６】[0016]
【表１】 [Table 1]
【００１７】[0017]
【表２】 [Table 2]
【００１８】実施例２ 化学成分組成を種々に変化させた表３に組成を示す合金
鋼粉に、黒鉛粉： 0.9重量％およびステアリン酸亜鉛
粉：１重量％を添加混合したのち、圧縮成形により、密
度：7.0g/cm3の成形体を作製した。これらの成形体を、
窒素雰囲気中、1250℃、60分間の条件で焼結を行った。
このようにして得られた焼結体について、引張強さ、耐
久疲れ強さならびにシャルピー衝撃値を実施例１と同様
に調べた。これらの実験結果を表４に示す。この表から
明らかなように、この発明の適合例はすべて引張強さ、
耐久疲れ強さ、シャルピー衝撃値ともにそれぞれ80kgf/
mm2、35kgf/mm2 、2.0kgf・m/cm2 以上と良好な値を示
している。Example 2 Graphite powder: 0.9% by weight and zinc stearate powder: 1% by weight were added to an alloy steel powder having the composition shown in Table 3 in which the chemical composition was variously changed, followed by compression molding. A molded body having a density of 7.0 g / cm 3 was produced. These compacts are
Sintering was performed in a nitrogen atmosphere at 1250 ° C. for 60 minutes.
The thus obtained sintered body was examined for tensile strength, durability fatigue strength and Charpy impact value in the same manner as in Example 1. Table 4 shows the results of these experiments. As is clear from this table, all of the applicable examples of the present invention have tensile strength,
80kgf / for both endurance fatigue strength and Charpy impact value
mm 2 , 35 kgf / mm 2 , 2.0 kgf · m / cm 2 or more show good values.
【００１９】[0019]
【表３】 [Table 3]
【００２０】[0020]
【表４】 [Table 4]
【００２１】実施例３ 化学成分組成を種々に変化させた表３に組成を示す合金
鋼粉に、ステアリン酸亜鉛粉：１重量％を添加混合した
のち、圧縮成形により密度：7.0g/cm3の成形体を作製し
た。これらの成形体を、窒素雰囲気中、1250℃、60分間
の条件で焼結を行ったのち、890 ℃で 120分間の浸炭処
理（カーボンポテンシャル0.9 ％に続いて油焼入れした
のち、150 ℃で60分間の焼戻し処理を施した。このよう
にして得られた浸炭熱処理焼結体について、実施例１と
同様に引張強さ、耐久疲れ強さならびにシャルピー衝撃
値を調べた。これらの実験結果を表５に示す。この表か
ら明らかなように、この発明の適合例はすべて引張強
さ、耐久疲れ強さ、シャルピー衝撃値ともにそれぞれ12
5kgf/mm2、45kgf/mm2 、1.0kgf・m/cm2 以上と良好な値
を示している。Example 3 Zinc stearate powder: 1% by weight was added to alloy steel powder having the composition shown in Table 3 in which the chemical composition was variously changed, followed by compression molding, followed by compression molding to obtain a density of 7.0 g / cm 3. Was formed. After sintering these compacts in a nitrogen atmosphere at 1250 ° C. for 60 minutes, carburizing at 890 ° C. for 120 minutes (carbon potential 0.9%, followed by oil quenching, followed by 60 ° C. at 150 ° C.) The carburized heat-treated sintered body thus obtained was examined for tensile strength, durability fatigue strength and Charpy impact value in the same manner as in Example 1. The experimental results are shown in the table below. The results are shown in Table 5. As is clear from this table, all of the applicable examples of the present invention have a tensile strength, a durability fatigue strength and a Charpy impact value of 12 respectively.
It shows good values of 5 kgf / mm 2 , 45 kgf / mm 2 , 1.0 kgf · m / cm 2 or more.
【００２２】[0022]
【表５】 [Table 5]
【００２３】実施例４ 表３に示す粉末記号Ａの合金鋼粉に、黒鉛粉：0.1 〜1.
3 重量％およびステアリン酸亜鉛粉：１重量％を添加混
合したのち、圧縮成形により、密度：7.0g/cm3の成形体
を作製した。これらの成形体を、窒素雰囲気中、1250
℃、60分間の条件で焼結を行った。このようにして得ら
れた焼結体について、実施例１と同様に引張強さ、耐久
疲れ強さならびにシャルピー衝撃値を調べた。これらの
実験結果を表６に示す。この表から明らかなように、こ
の発明の適合例はすべて引張強さ、耐久疲れ強さ、シャ
ルピー衝撃値ともにそれぞれ80kgf/mm2 、35kgf/mm2 、
2.0kgf・m/cm2 以上と良好な値を示している。Example 4 An alloy steel powder having a powder symbol A shown in Table 3 was added to graphite powder: 0.1 to 1.
After adding and mixing 3% by weight and zinc stearate powder: 1% by weight, a compact having a density of 7.0 g / cm 3 was prepared by compression molding. These compacts are placed in a nitrogen atmosphere at 1250
Sintering was performed at 60 ° C. for 60 minutes. For the sintered body thus obtained, the tensile strength, the durability fatigue strength and the Charpy impact value were examined in the same manner as in Example 1. Table 6 shows the results of these experiments. As it is apparent from this table, all adaptations tensile strength of the present invention, durability fatigue strength, 80 kgf / mm 2, respectively Charpy impact value both, 35 kgf / mm 2,
It shows a good value of 2.0 kgf · m / cm 2 or more.
【００２４】[0024]
【表６】 [Table 6]
【００２５】[0025]
【発明の効果】この発明は、合金鋼粉の化学成分組成、
特にMn量、Ｓ量、Ｐ量を適正化することにより、焼結体
の引張強度、疲労強度、靱性を向上させたものであり、
高強度焼結部品の用途を拡大するものである。According to the present invention, the chemical composition of the alloy steel powder is
In particular, by optimizing the amount of Mn, S, and P, the tensile strength, fatigue strength, and toughness of the sintered body are improved.
This expands the use of high-strength sintered parts.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) C22C 38/00 - 38/60 C22C 33/02 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 7 , DB name) C22C 38/00-38/60 C22C 33/02
Claims (2)
％以下、Cr： 0.5〜３％、Mo： 0.1〜２％、Ｓ：0.01％
以下、Ｐ：0.01％以下、Ｏ： 0.2％以下を含有し、残部
は不可避的不純物およびFeからなることを特徴とする高
強度、高疲労強度および高靱性を有する焼結体用合金鋼
粉。[Claim 1] In weight%, C: 0.1% or less, Mn: 0.08
%, Cr: 0.5-3%, Mo: 0.1-2%, S: 0.01%
An alloy steel powder for a sintered body having a high strength, a high fatigue strength and a high toughness, comprising: P: 0.01% or less and O: 0.2% or less, with the balance being unavoidable impurities and Fe.
08％以下、Cr： 0.5〜３％、Mo： 0.1〜２％、Ｓ：0.01
％以下、Ｐ：0.01％以下、Ｏ： 0.2％以下を含有し、残
部は不可避的不純物およびFeからなることを特徴とする
高強度、高疲労強度および高靱性を有する焼結体。2. C .: 0.2 to 1.2% by weight, Mn: 0.
08% or less, Cr: 0.5-3%, Mo: 0.1-2%, S: 0.01
%, P: 0.01% or less, O: 0.2% or less, with the balance being unavoidable impurities and Fe, wherein the sintered body has high strength, high fatigue strength and high toughness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12793992A JP3224417B2 (en) | 1992-02-14 | 1992-04-22 | Alloy steel powder and sintered body for sintered body having high strength, high fatigue strength and high toughness |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2763792 | 1992-02-14 | ||
| JP4-27637 | 1992-02-14 | ||
| JP12793992A JP3224417B2 (en) | 1992-02-14 | 1992-04-22 | Alloy steel powder and sintered body for sintered body having high strength, high fatigue strength and high toughness |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05287452A JPH05287452A (en) | 1993-11-02 |
| JP3224417B2 true JP3224417B2 (en) | 2001-10-29 |
Family
ID=26365595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12793992A Expired - Fee Related JP3224417B2 (en) | 1992-02-14 | 1992-04-22 | Alloy steel powder and sintered body for sintered body having high strength, high fatigue strength and high toughness |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3224417B2 (en) |
Cited By (3)
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|---|---|---|---|---|
| KR20180022994A (en) | 2015-09-30 | 2018-03-06 | 제이에프이 스틸 가부시키가이샤 | Production method for alloy steel powder for powder metallurgy |
| KR20180022995A (en) | 2015-09-30 | 2018-03-06 | 제이에프이 스틸 가부시키가이샤 | Production method for alloy steel powder for powder metallurgy |
| KR20180033567A (en) | 2015-09-30 | 2018-04-03 | 제이에프이 스틸 가부시키가이샤 | Production method for alloy steel powder for powder metallurgy |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5389577B2 (en) | 2008-09-24 | 2014-01-15 | Ｊｆｅスチール株式会社 | Method for producing sintered body by powder metallurgy |
| JP5929320B2 (en) * | 2012-03-01 | 2016-06-01 | Ｊｆｅスチール株式会社 | Alloy steel powder for powder metallurgy and method for producing alloy steel powder for powder metallurgy |
| JP6010015B2 (en) * | 2012-12-28 | 2016-10-19 | 株式会社神戸製鋼所 | Manufacturing method of carburizing and quenching material |
| WO2017043091A1 (en) * | 2015-09-11 | 2017-03-16 | Ｊｆｅスチール株式会社 | Method for producing alloyed steel powder for sintered member starting material |
-
1992
- 1992-04-22 JP JP12793992A patent/JP3224417B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180022994A (en) | 2015-09-30 | 2018-03-06 | 제이에프이 스틸 가부시키가이샤 | Production method for alloy steel powder for powder metallurgy |
| KR20180022995A (en) | 2015-09-30 | 2018-03-06 | 제이에프이 스틸 가부시키가이샤 | Production method for alloy steel powder for powder metallurgy |
| KR20180033567A (en) | 2015-09-30 | 2018-04-03 | 제이에프이 스틸 가부시키가이샤 | Production method for alloy steel powder for powder metallurgy |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05287452A (en) | 1993-11-02 |
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