JPH04143244A - Al-si alloy powder forged member excellent in toughness - Google Patents

Al-si alloy powder forged member excellent in toughness

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Publication number
JPH04143244A
JPH04143244A JP26607990A JP26607990A JPH04143244A JP H04143244 A JPH04143244 A JP H04143244A JP 26607990 A JP26607990 A JP 26607990A JP 26607990 A JP26607990 A JP 26607990A JP H04143244 A JPH04143244 A JP H04143244A
Authority
JP
Japan
Prior art keywords
powder
alloy powder
free carbon
compression molded
cold compression
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.)
Pending
Application number
JP26607990A
Other languages
Japanese (ja)
Inventor
Koichiro Morimoto
耕一郎 森本
Masaharu Kobayashi
小林 政春
Seiichi Kirigatani
桐ヶ谷 清一
Kinya Kawase
欣也 川瀬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Materials Corp
Original Assignee
Mitsubishi Materials Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Materials Corp filed Critical Mitsubishi Materials Corp
Priority to JP26607990A priority Critical patent/JPH04143244A/en
Publication of JPH04143244A publication Critical patent/JPH04143244A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To increase the degree of freedom in the application of shape by plastic working, to improve yield, and to reduce machining by incorporating specific amounts of C into an Al-Si powder. CONSTITUTION:A powder forged member has a composition consisting of, by weight, 10-35% Si, 1-5% Cu, 0.5-3% Mg, 0.5-10% of one or more elements among Fe, Ni, Mn, and Cr, 0.01-0.3% C, and the balance Al with inevitable impurities. It is preferable that the above C is dispersed in the form of free carbon in the powder grain boundaries. When an organic matter in liquid state is impregnated into a cold-compacted green compact prepared by using a powder with the above composition and heated at a temp. between the decomposition temp. of the liquid organic matter and 550 deg.C, the liquid organic matter is decomposed into free carbon. This free carbon is dispersed along the grain boundaries of the powder. This free carbon acts as a lubricant at the time of hot plastic working.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、エンジン、コンプレッサー等の各種機械部
品に使用した場合に優れた性能を発揮する靭性に優れた
Al2−3i系合金粉末鍛造部材およびその1)−Si
系合金粉末鍛造部材を製造するための冷間圧縮成形体に
関するものである。
[Detailed Description of the Invention] [Field of Industrial Application] This invention provides an Al2-3i alloy powder forged member with excellent toughness that exhibits excellent performance when used in various mechanical parts such as engines and compressors. Part 1) -Si
The present invention relates to a cold compression molded body for manufacturing a powder forged member of a based alloy.

〔従来の技術〕[Conventional technology]

Si:LO〜35%、Cu:1〜5%以下、Mg:0.
5〜3%以下、Fc、Ni 、Mn、Crのうち1種ま
たは2種以上:0.5〜10%を含有し、残部: AN
 表よび不可避不純物から成る成分組成(以上、%l=
重量%)を有し、かつ急冷凝固法により得られたAfI
−5I系合金粉末を原料粉末とし、この原料粉末を冷間
圧縮成形して冷間圧縮成形体を製造しこの冷間圧縮成形
体を用いてホットプレスまたは予備熱間鍛造などにより
密度比が100%に近い緻密なプリフォームを製造した
後押出し、鍛造などの大きな変形をともなう熱間塑性加
工を施して固化、成形することによりAJ−3t系合金
部材を製造する方法は知られている。このAj!−3t
系合金粉末鍛造部材は、上記熱間塑性加工時の加工度を
高めるに従い、粉末表面の酸化物の破壊、分散が進み、
粉末同志の金属結合が強固となり、靭性が向上する。
Si: LO~35%, Cu: 1~5% or less, Mg: 0.
Contains 5 to 3% or less, one or more of Fc, Ni, Mn, and Cr: 0.5 to 10%, the remainder: AN
Component composition consisting of table and unavoidable impurities (wherein, %l=
% by weight) and obtained by a rapid solidification method.
-5I alloy powder is used as a raw material powder, this raw material powder is cold compression molded to produce a cold compression molded body, and this cold compression molded body is heated to a density ratio of 100 by hot pressing or preliminary hot forging. There is a known method for manufacturing AJ-3t alloy members by manufacturing a preform with a density close to 100%, followed by hot plastic working involving large deformation, such as extrusion or forging, and then solidifying and forming it. This Aj! -3t
As the processing degree of the alloy powder forged parts increases during the above-mentioned hot plastic working, the destruction and dispersion of oxides on the powder surface progresses.
The metal bond between the powders becomes stronger, improving toughness.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

しかしながら、従来の上記予備鍛造体あるいはホットプ
レス体などのプリフォームは、熱間塑性加工性が悪いた
めに大きな熱間塑性加工による変形を加えると割れか生
じ、熱間塑性加工による加工度を大きくとることができ
ず、したがって、靭性の優れたAl−Sj系合金粉末鍛
造部材を得ることかできなかった。
However, conventional preforms such as the above-mentioned pre-forged bodies or hot-pressed bodies have poor hot plastic workability, so cracks occur when large deformations are applied by hot plastic working, and the degree of workability by hot plastic working is large. Therefore, it was not possible to obtain an Al-Sj based alloy powder forged member with excellent toughness.

〔課題を解決するための手段〕[Means to solve the problem]

そこで、本発明者らは、かかる課題を解決すべく研究を
行った結果、 S i:l(1〜35%、Cu:1〜5%、Mg:0.
5〜3%、Fe、Ni 、Mn、Crのうち1種または
2種以上二〇、5〜10%を含有し、残部二AIおよび
不可避不純物から成る組成(以上、%は、重量%)を有
するAn)−Si系合金粉末を冷間圧縮成形して冷間圧
縮成形体を製造し、上記冷間圧縮成形体に液体状有機物
を含浸せしめ、その液体状有機物含浸冷間圧縮成形体を
上記液体状有機物の分解温度以上550℃以下の温度に
加熱して上記液体状有機物を炭化せしめることにより、
上記冷間圧縮成形体の粉末粒界に遊離炭素が分散してい
る組織を有する冷間圧縮成形体を製造し、上記粉末粒界
に遊離炭素が分散している組織を有する冷間圧縮成形体
を用いてホットプレスまたは、熱間予備鍛造を行ってプ
リフォームを製造し、これに大きな変形をともなう熱間
鍛造を施すと、靭性の優れたAl−Si系合金粉末鍛造
部材を得ることができるという知見を得たのである。
Therefore, the present inventors conducted research to solve this problem and found that Si:l (1 to 35%, Cu: 1 to 5%, Mg: 0.
5-3%, 20.5-10% of one or more of Fe, Ni, Mn, and Cr, and the remainder consists of 2 AI and unavoidable impurities (% is weight %). A cold compression molded body is produced by cold compression molding an An)-Si based alloy powder having the composition, the cold compression molded body is impregnated with a liquid organic substance, and the liquid organic substance-impregnated cold compression molded body is By heating the liquid organic substance to a temperature of not less than the decomposition temperature of the liquid organic substance and not more than 550°C, and carbonizing the liquid organic substance,
producing a cold compression molded body having a structure in which free carbon is dispersed in the powder grain boundaries of the cold compression molded body; If a preform is manufactured by hot pressing or hot pre-forging using a preform, and then hot forging with large deformation is performed on the preform, an Al-Si alloy powder forged member with excellent toughness can be obtained. We obtained this knowledge.

この発明は、かかる知見にもとづいてなされたものであ
って、 S i:10〜35%、Cu:1〜596、Mg:0.
5〜3%、Fe、Ni 、Mn、Crのうち1種または
2種以上:0.5〜10%、c : o、ot 〜o、
a%を含有し、残部:AfIおよび不可避不純物から成
る組成(以上、%は、重量%)を有する靭性の優れたA
N−Sj系合金粉末鍛造部材、および、 Sj:lO〜35%、Cu:1〜5%、Mg:0.5〜
3%、Fe、Ni 、Mn、Crのうち1種または2種
以上:0.5〜10%、C: 0.01−0.3%を含
有し、残部:Alおよび不可避不純物から成る組成(以
上、%は、重量%)を有し、かつ上記Cは、粉末粒界に
2!IM炭素として分散している組織を有する靭性の優
れたAN−Si系合金粉末鍛造部材を製造するための冷
間圧縮成形体、 に特徴を有するものである。
This invention was made based on this knowledge, and includes Si: 10-35%, Cu: 1-596, Mg: 0.
5 to 3%, one or more of Fe, Ni, Mn, and Cr: 0.5 to 10%, c: o, ot to o,
A having excellent toughness and having a composition (hereinafter, % is weight %) containing 1% and the remainder: AfI and unavoidable impurities.
N-Sj alloy powder forged member, and Sj: lO ~ 35%, Cu: 1 ~ 5%, Mg: 0.5 ~
3%, one or more of Fe, Ni, Mn, and Cr: 0.5-10%, C: 0.01-0.3%, and the remainder: Al and inevitable impurities ( Above, % is weight %), and the above C is 2! at the powder grain boundary. A cold compression molded body for producing an AN-Si based alloy powder forged member having excellent toughness and having a structure dispersed as IM carbon.

上記冷間圧縮成形体に液体状有機物を含浸せしめ、その
液体状有機物を含浸せしめた冷間圧縮成形体を上記液体
状有機物の分解温度以上550℃以下の温度で加熱する
と、液体状有機物が分解されて遊離炭素となり、その遊
離炭素は粉末の粒界に沿って分散し、この粉末の粒界に
沿って分散している遊離炭素が熱間塑性加工する時の潤
滑剤として作用し、そのために加工度が向上するものと
考えられる。
When the cold compression molded body is impregnated with a liquid organic substance and the cold compression molded body impregnated with the liquid organic substance is heated at a temperature higher than the decomposition temperature of the liquid organic substance and lower than 550°C, the liquid organic substance decomposes. The free carbon is dispersed along the grain boundaries of the powder, and the free carbon dispersed along the grain boundaries of the powder acts as a lubricant during hot plastic working. It is thought that the processing efficiency is improved.

この遊離炭素は0.O1〜0.3重量%の範囲内で含ん
でいることが好ましく 、0.01重ffi%未満では
十分な熱間塑性加工性が得られず、一方、0.3重量%
を越えて含有するとAN−Si系合金粉末粒子間の結合
を阻害し、かえって熱間塑性加工性および靭性を低下さ
せるので好ましくない。
This free carbon is 0. It is preferable that O is contained in the range of 1 to 0.3% by weight; if it is less than 0.01% by weight, sufficient hot plastic workability cannot be obtained; on the other hand, 0.3% by weight
If the content exceeds the above range, it is undesirable because it inhibits the bonding between the AN-Si alloy powder particles and deteriorates the hot plastic workability and toughness.

しかし、上記Al−5X系合金粉末に黒鉛などの固体潤
滑剤粉末を添加混合したのち、冷間圧縮成形しても微細
な潤滑剤粉末を微量均一に分散させることは困難であり
、粗大で偏析した潤滑剤粉末は、かえって熱間塑性加工
時のA、77−Si系合金粉末粒子間の結合を阻害する
However, after adding solid lubricant powder such as graphite to the Al-5X alloy powder and then cold compression molding, it is difficult to uniformly disperse the fine lubricant powder, and it is coarse and segregated. On the contrary, the lubricant powder inhibits the bonding between the A, 77-Si alloy powder particles during hot plastic working.

〔実 施 例〕〔Example〕

つぎに、この発明を実施例に基づいて具体的に説明する
Next, the present invention will be specifically explained based on examples.

第1表に示される成分組成を有するAll−Si系合金
溶湯を空気アトマイズして調製した平均粒径:40−の
All−Si系合金粉末を用意し、圧力=5ton/c
−で金型ブレス成形し、直径ニア5sm、高さ=60關
の円柱冷間圧縮成形体を製造した。
Prepared All-Si alloy powder with an average particle size of 40 - prepared by air atomizing a molten All-Si alloy having the composition shown in Table 1, and applying a pressure of 5 ton/c.
- A cylindrical cold compression molded body with a diameter of 5 sm and a height of 60 sq. was produced by press molding with a mold.

この円柱冷間圧縮成形体を第1表に示される種々のオレ
イン酸濃度を有するエタノール溶液に浸漬し、この液体
を十分に円柱冷間圧縮成形体に含浸せしめたのち、取出
して乾燥し、窒素雰囲気中、500℃の温度で30分加
熱した。加熱された円柱冷間圧縮成形体の組織は、AN
−3i系合金粉末の粒界に微細な遊離炭素か分散してい
ることか・金属顕微鏡により確認された。ついで、上記
冷間圧縮成形体を温度480℃に加熱保持しながら密閉
型鍛造を施して密度比98%以上の予備鍛造体を製造し
た。
This cylindrical cold compression molded body is immersed in ethanol solutions having various oleic acid concentrations shown in Table 1, and after the liquid is sufficiently impregnated into the cylindrical cold compression molded body, it is taken out, dried, and It was heated in an atmosphere at a temperature of 500° C. for 30 minutes. The structure of the heated cylindrical cold compression molded body is AN
It was confirmed using a metallurgical microscope that fine free carbon was dispersed in the grain boundaries of the -3i alloy powder. Next, the cold compression molded body was subjected to closed die forging while being heated and maintained at a temperature of 480° C. to produce a preliminary forged body having a density ratio of 98% or more.

次に、上記予備鍛造体を再び温度:480℃に加熱保持
し、上記予備鍛造体に据込速度: 70mm/ see
で軸方向から荷重をかけて熱間据込鍛造を施し、上記予
備鍛造体を押し潰し、上記予備鍛造体か押し潰されて側
面に割れが生じた時の高さを測定し、限界据込率を測定
し、それらの値を第1表に示した。上記限界据込率は、
予備鍛造体の元の高さをHo、押し潰されて側面に割れ
が生じた時の高さをHeとすると、 Ho−He/HoX 100 (%)、で表される。
Next, the pre-forged body was heated and maintained at a temperature of 480° C. again, and the pre-forged body was upset at a speed of 70 mm/see.
Hot upsetting forging is performed by applying a load from the axial direction at The ratios were measured and their values are shown in Table 1. The above marginal upsetting rate is
Assuming that the original height of the preliminary forged body is Ho, and the height when the side surface is crushed and cracked is He, it is expressed as Ho-He/HoX 100 (%).

第1表の結果から、この発明の粒界に微細な遊離炭素が
分散している本発明円柱冷間圧縮成形体1〜9を用いて
製造された予備鍛造体は、従来のものに比べて限界据込
率が格段に優れていることから熱間塑性加工性が優れて
おり、C含有量がこの発明の条件から外れている比較円
柱冷間圧縮成形体1〜6を用いて製造された予備鍛造体
(この発明の条件から外れている値に※印を付して第1
表に示した)は、限界据込率か少し劣ることから熱間塑
性加工性か少し劣ることかわかる。
From the results in Table 1, it is clear that the pre-forged bodies produced using the cylindrical cold compression molded bodies 1 to 9 of the present invention in which fine free carbon is dispersed in the grain boundaries are superior to those of the conventional ones. The hot plastic workability was excellent due to the extremely high limit upsetting rate, and the C content was manufactured using comparative cylindrical cold compression molded bodies 1 to 6 that were outside the conditions of the present invention. Pre-forged body (values that deviate from the conditions of this invention are marked with * and
) shown in the table is slightly inferior to the limit upsetting rate, which indicates that the hot plastic workability is slightly inferior.

さらに上記予備鍛造体を側面に割れか生じるまで押し潰
して得られた本発明A、Q−Si系合金粉末鍛造部材1
〜9、比較A、Q−5t系合金粉末鍛造部材1〜6およ
び従来A、9−3t系合金粉末鍛造部材の成分組成を第
2表に示すとともに、これらAn)−Si系合金粉末鍛
造部材に溶体化処理:480℃1h加熱保持後、水温4
0℃のポリアルキレングリコール15%水溶液に焼入れ
、時効処理:170℃10h加熱保持の条件で熱処理を
施した後、寸法10mm X 10+*m X 50+
uの試験片を切り出してシャルピー衝撃試験(ノツチな
し)を行い、その結果も第2表に示した。
Invention A, Q-Si alloy powder forged member 1 obtained by further crushing the preliminary forged body until cracks appear on the side surface.
Table 2 shows the compositions of Comparative A, Q-5t alloy powder forged members 1 to 6 and Conventional A, 9-3t alloy powder forged members, and these An)-Si alloy powder forged members. Solution treatment: After heating and holding at 480°C for 1 hour, water temperature 4
Quenched in 15% polyalkylene glycol aqueous solution at 0℃, aging treatment: After heat treatment under the conditions of heating and holding at 170℃ for 10 hours, dimensions: 10mm x 10+*m x 50+
A test piece of u was cut out and subjected to a Charpy impact test (no notch), and the results are also shown in Table 2.

第2表の結果から、本発明AΩ−8i系合金粉末鍛造部
材1〜9は、いずれも従来A、17−Si系合金粉末鍛
造部材よりもシャルピー衝撃試験値か優れていることか
ら靭性が格段に優れており、さらに、この発明の条件か
ら外れている比較Al −Si系合金粉末鍛造部材1〜
6(この発明の条件から外れている値に栗印を付して第
2表に示した)は、シャルピー衝撃試験値か劣ることか
ら、靭性が劣ることかわかる。
From the results in Table 2, the Charpy impact test values of the AΩ-8i based alloy powder forged members 1 to 9 of the present invention are superior to the conventional A and 17-Si based alloy powder forged members, so the toughness is markedly higher. Comparative Al-Si based alloy powder forged members 1-
6 (values that deviate from the conditions of this invention are marked with a chestnut in Table 2) are inferior in Charpy impact test value, which indicates that the toughness is inferior.

〔発明の効果〕〔Effect of the invention〕

この発明によると、従来よりも靭性の優れたAl1−8
I系合金粉末鍛造部材を提供することができ、信頼性が
向上し、塑性加工による形状付与の自由度が広がり、も
って歩留りの向上、機械加工の削減、コスト低減などが
できるとともに、機械部品などの寿命を延ばすことがで
きるなどの優れた効果を奏するものである。
According to this invention, Al1-8 has superior toughness than the conventional one.
It is possible to provide I-series alloy powder forged parts, which improves reliability and expands the degree of freedom in forming shapes through plastic working, thereby improving yields, reducing machining, and reducing costs, as well as mechanical parts, etc. It has excellent effects such as being able to extend the life of the product.

Claims (2)

【特許請求の範囲】[Claims] (1)Si:10〜35%、 Cu:1〜5%、 Mg:0.5〜3%、 Fe,Ni,Mn,Crのうち1種または2種以上:0
.5〜10%、 C:0.01〜0.3%、 残部:Alおよび不可避不純物、 から成る組成(以上、%は、重量%)を有することを特
徴とする靭性に優れたAl−Si系合金粉末鍛造部材。
(1) Si: 10 to 35%, Cu: 1 to 5%, Mg: 0.5 to 3%, one or more of Fe, Ni, Mn, and Cr: 0
.. 5 to 10%, C: 0.01 to 0.3%, and the remainder: Al and unavoidable impurities. Alloy powder forged parts.
(2)Si:10〜35%、 Cu:1〜5%、 Mg:0.5〜3%、 Fe,Ni,Mn,Crのうち1種または2種以上:0
.5〜10%、 C:0.01〜0.3%、 残部:Alおよび不可避不純物、 から成る組成(以上、%は、重量%)を有し、かつ上記
Cは、粉末粒界に遊離炭素として分散している組織を有
する、 ことを特徴とする靭性に優れたAl−Si系合金粉末鍛
造部材を製造するための冷間圧縮成形体。
(2) Si: 10 to 35%, Cu: 1 to 5%, Mg: 0.5 to 3%, one or more of Fe, Ni, Mn, and Cr: 0
.. 5-10%, C: 0.01-0.3%, balance: Al and unavoidable impurities (in the above, % is weight %), and the above C has free carbon at the powder grain boundary. A cold compression molded body for producing an Al-Si based alloy powder forged member having excellent toughness, characterized by having a structure in which the particles are dispersed as follows.
JP26607990A 1990-10-03 1990-10-03 Al-si alloy powder forged member excellent in toughness Pending JPH04143244A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26607990A JPH04143244A (en) 1990-10-03 1990-10-03 Al-si alloy powder forged member excellent in toughness

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26607990A JPH04143244A (en) 1990-10-03 1990-10-03 Al-si alloy powder forged member excellent in toughness

Publications (1)

Publication Number Publication Date
JPH04143244A true JPH04143244A (en) 1992-05-18

Family

ID=17426057

Family Applications (1)

Application Number Title Priority Date Filing Date
JP26607990A Pending JPH04143244A (en) 1990-10-03 1990-10-03 Al-si alloy powder forged member excellent in toughness

Country Status (1)

Country Link
JP (1) JPH04143244A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104831133A (en) * 2015-05-11 2015-08-12 山东汇川汽车部件有限公司 Swash plate of automobile air-condition compressor and production method of swash plate
WO2017199564A1 (en) * 2016-05-18 2017-11-23 住友電気工業株式会社 Aluminum alloy and aluminum alloy manufacturing method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104831133A (en) * 2015-05-11 2015-08-12 山东汇川汽车部件有限公司 Swash plate of automobile air-condition compressor and production method of swash plate
WO2017199564A1 (en) * 2016-05-18 2017-11-23 住友電気工業株式会社 Aluminum alloy and aluminum alloy manufacturing method
JP2017206739A (en) * 2016-05-18 2017-11-24 住友電気工業株式会社 Aluminum alloy and method for producing aluminum alloy
CN109154094A (en) * 2016-05-18 2019-01-04 住友电气工业株式会社 The manufacturing method of aluminium alloy and aluminium alloy
US10808300B2 (en) 2016-05-18 2020-10-20 Sumitomo Electric Industries, Ltd. Aluminum alloy and method for manufacturing aluminum alloy

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