JP2730284B2 - Manufacturing method of Al-Si alloy sintered forged parts - Google Patents
Manufacturing method of Al-Si alloy sintered forged partsInfo
- Publication number
- JP2730284B2 JP2730284B2 JP2251139A JP25113990A JP2730284B2 JP 2730284 B2 JP2730284 B2 JP 2730284B2 JP 2251139 A JP2251139 A JP 2251139A JP 25113990 A JP25113990 A JP 25113990A JP 2730284 B2 JP2730284 B2 JP 2730284B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid phase
- sintering
- alloy
- powder
- subjected
- 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 - Lifetime
Links
- 229910021364 Al-Si alloy Inorganic materials 0.000 title claims description 16
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000007791 liquid phase Substances 0.000 claims description 22
- 239000000843 powder Substances 0.000 claims description 22
- 238000005245 sintering Methods 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 15
- 229910045601 alloy Inorganic materials 0.000 claims description 14
- 239000000956 alloy Substances 0.000 claims description 14
- 238000005242 forging Methods 0.000 claims description 12
- 229910018125 Al-Si Inorganic materials 0.000 claims description 10
- 229910018520 Al—Si Inorganic materials 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000000748 compression moulding Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 239000012298 atmosphere Substances 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 230000001590 oxidative effect Effects 0.000 claims description 2
- 238000007712 rapid solidification Methods 0.000 claims description 2
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 238000009694 cold isostatic pressing Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
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設計制約を緩和することのできる
機械的特性の異方性が少ないAl-Si系合金焼結鍛造部材
の製造法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an Al-based alloy having less anisotropy in mechanical properties capable of relaxing design constraints when used for various mechanical parts such as an engine and a compressor. The present invention relates to a method for manufacturing a sintered Si-based alloy forged member.
Si:10〜35％、Cu:1〜５％、Mg:0.5〜３％以下、Fe,N
i,Mn,Crのうち１種または２種以上:0.5〜10％を含有
し、残部:Alおよび不可避不純物から成る成分組成（以
上、％は、重量％）を有し、エア・アトマイズ法により
得られたAl-Si系合金粉末を原料粉末として用い、この
原料粉末に冷間静水圧プレス（CIP）、金型成形などの
冷間圧縮成形を施して圧粉体を作製し、この圧粉体に押
出し、鍛造などの熱間塑性加工を施して固化、成形する
ことによりAl-Si系合金焼結鍛造部材を製造する方法は
知られている。この製造方法において、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、粉末同志の金属焼結が強固となり、強
度および靱性の優れたAl-Si系合金部材が得られる。Si: 10-35%, Cu: 1-5%, Mg: 0.5-3% or less, Fe, N
One or more of i, Mn, and Cr: 0.5 to 10%, and the balance: Al and a component composition consisting of unavoidable impurities (the above,% is% by weight). The obtained Al-Si alloy powder is used as a raw material powder, and the raw material powder is subjected to cold compression molding such as cold isostatic pressing (CIP) or die molding to produce a green compact. 2. Description of the Related Art There is known a method of manufacturing an Al-Si alloy sintered forged member by extruding a body, performing hot plastic working such as forging, and solidifying and forming the body. In this manufacturing method, as the working ratio during the hot plastic working is increased, the destruction and dispersion of the oxide on the powder surface progresses, the metal sintering of the powder becomes stronger, and the Al-Si based material having excellent strength and toughness is obtained. An alloy member is obtained.
しかしながら、従来の上記方法で製造されたAl-Si系
合金部材は、鍛伸方向では優れた機械的特性を示すもの
の、その直角方向では著しく機械的特性が低下するため
に、機械部品を設計するに際して大きな制約があった。However, although the Al-Si based alloy member manufactured by the conventional method described above exhibits excellent mechanical properties in the forging direction, the mechanical properties are significantly reduced in the direction perpendicular thereto, so that mechanical parts are designed. In doing so, there were significant restrictions.
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、 （ａ） 全体が150μｍ以下であり、150〜100μｍの粒
子が２％以上含まれる上記成分組成のAl-Si系合金粉末
を、その粒子の初期溶融（incipient melting）による
液相発生を利用した液相焼結を行い、粉末粒子間にある
程度の結合を与えたのち、熱間塑性加工を施すことによ
り、従来よりも小さな鍛伸量で優れた機械的特性を示す
Al-Si系合金焼結鍛造部材を得ることができるとともに
機械的特性の異方性が小さなAl-Si系合金焼結鍛造部材
を得ることができる、 （ｂ） 上記成分組成のAl-Si系合金粉末粒子の初期溶
融（incipient melting）による液相発生を利用した焼
結は、液相発生温度〜液相発生温度＋50℃、の温度範囲
内で液相焼結することが好ましい、 などの知見を得たのである。The inventors of the present invention have conducted researches to solve such problems. (A) Al-Si based alloys having the above-described component composition in which the entirety is 150 μm or less and 150 to 100 μm particles are contained in 2% or more. The powder is subjected to liquid phase sintering using the liquid phase generation due to the initial melting of the particles (incipient melting) to give a certain degree of bonding between the powder particles, and then subjected to hot plastic working to increase Excellent mechanical properties with small forging
It is possible to obtain an Al-Si alloy sintered forged member having a small anisotropy of mechanical properties while obtaining an Al-Si alloy sintered forged member. The sintering utilizing the liquid phase generation due to the incipient melting of the alloy powder particles is preferably performed in the liquid phase temperature range from the liquid phase generation temperature to the liquid phase generation temperature + 50 ° C. I got it.
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、 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％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％）を有しかつ急冷凝固法により得られたAl-Si系
合金粉末を冷間圧縮成形して圧粉体を製造し、この圧粉
体を非酸化雰囲気中で焼結したのち、熱間塑性加工を施
すAl-Si系合金焼結鍛造部材の製造法において、 上記Al-Si系合金粉末は、全体が150μｍ以下であり、
150〜100μｍの粒子が２重量％以上含まれる粒度の粉末
を使用し、上記焼結は、液相発生温度〜液相発生温度＋
50℃、の温度範囲内で液相焼結する機械的特性の異方性
が少ないAl-Si系合金焼結鍛造部材の製造法に特徴を有
するものである。The present invention has been made based on this finding, and includes Si: 10 to 35%, Cu: 1 to 5%, Mg: 0.5 to 3%, Fe, Ni, Mn,
One or more kinds of Cr: 0.5 to 10%, the balance: a composition composed of Al and unavoidable impurities (%,
% By weight) and a compact is produced by cold compression molding an Al-Si alloy powder obtained by a rapid solidification method, and then sintering the compact in a non-oxidizing atmosphere, In the method for producing an Al-Si-based alloy sintered forged member to be subjected to cold plastic working, the Al-Si-based alloy powder as a whole is 150 μm or less,
A powder having a particle size containing 150 to 100 μm particles of 2% by weight or more is used.
The present invention is characterized by a method for producing an Al-Si based alloy sintered forged member having low anisotropy in mechanical properties for liquid phase sintering within a temperature range of 50 ° C.
つぎに、この発明で使用するAl-Si系合金粉末の粒度
および液相焼結温度を上記のごとく限定した理由につい
て説明する。Next, the reason why the particle size and the liquid phase sintering temperature of the Al-Si alloy powder used in the present invention are limited as described above will be described.
（ａ） Al-Si系合金粉末の粒度 上記成分組成を有するAl-Si系合金粉末の粒度は、全
体が150μｍを越えると、金属組織の初晶Siが粗くな
り、強度および靱性が低下するので好ましくなく、上記
成分組成を有するAl-Si系合金粉末を液相発生温度の直
上で焼結すると、まずCu,Mg,Siのミクロ偏析部に液相が
発生するために150〜100μｍの粒子が２重量％以上含ま
れることが必要であり、２重量％未満では液相焼結する
ことによる効果が少ない。(A) Particle size of Al-Si alloy powder When the particle size of the Al-Si alloy powder having the above-mentioned composition exceeds 150 μm, the primary crystal Si of the metal structure becomes coarse and the strength and toughness decrease. Undesirably, when Al-Si alloy powder having the above composition is sintered just above the liquid phase generation temperature, first, a liquid phase is generated in the microsegregated part of Cu, Mg, Si, so that particles of 150 to 100 μm are generated. It must be contained in an amount of 2% by weight or more, and if it is less than 2% by weight, the effect of liquid phase sintering is small.
したがって、上記成分組成を有するAl-Si系合金粉末
の粒度は、全体が150μｍ以下であり、かつ150〜100μ
ｍの粒子が２重量％以上と定めた。Therefore, the particle size of the Al-Si based alloy powder having the above component composition is 150 μm or less as a whole, and 150 to 100 μm.
m was determined to be 2% by weight or more.
（ｂ） 焼結温度 上記成分組成のAl-Si系合金粉末粒子の初期溶融（inc
ipient melting）による液相発生を利用した焼結は、液
相発生温度未満では液相焼結の効果が得られず、液相発
生温度＋50℃の温度よりも高い温度で焼結すると金属組
織が粗大化し、機械的特性が低下するので好ましくな
い。したがって、焼結温度は、液相発生温度〜液相発生
温度＋50℃の温度範囲内に定めた。(B) Sintering temperature Initial melting of the Al-Si alloy powder particles having the above composition (inc
In the sintering using liquid phase generation due to ipient melting, the effect of liquid phase sintering cannot be obtained below the liquid phase generation temperature, and when sintering at a temperature higher than the liquid phase generation temperature + 50 ° C, the metal structure becomes It is not preferable because of coarsening and deterioration of mechanical properties. Therefore, the sintering temperature was set within the temperature range from the liquid phase generation temperature to the liquid phase generation temperature + 50 ° C.
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 described based on examples.
実施例１〜９および比較例１〜８ 第１表に示される成分組成および粒度を有するAl-Si
系合金空気アトマイズ粉末を用意し、このAl-Si系合金
アトマイズ粉末を圧力3ton/cm2で冷間静水圧プレス（CI
P）し、直径:60mm、高さ:120mmの円柱状圧粉体を製造し
た。Examples 1 to 9 and Comparative Examples 1 to 8 Al-Si having the component compositions and particle sizes shown in Table 1
Atomized alloy air powder was prepared, and the Al-Si alloy atomized powder was cold isostatically pressed at a pressure of 3 ton / cm 2 (CI
P) to produce a columnar green compact having a diameter of 60 mm and a height of 120 mm.
この圧粉体を窒素雰囲気中、第１表に示される温度お
よび時間で液相焼結し、焼結体を作製した後、焼結体を
480℃に加熱保持しながら機械プレスを用いて加工率※1
0％のもとで密閉型鍛造を行い、焼結鍛造部材を得た。
この焼結鍛造部材に、480℃×1hr加熱保持後、温度40℃
のポリアルキレングリコール13％水溶液に焼入れという
条件で溶体化処理を施し、そののち、170℃×10hr加熱
保持の条件で時効処理を施した。This green compact was subjected to liquid phase sintering in a nitrogen atmosphere at the temperature and time shown in Table 1 to produce a sintered body.
Processing rate using a mechanical press while holding at 480 ° C * 1
Closed die forging was performed under 0% to obtain a sintered forged member.
After heating and holding this sintered forged member at 480 ° C for 1 hour,
Was subjected to a solution treatment under the condition of quenching, followed by aging treatment under the condition of heating at 170 ° C. × 10 hours.
このようにして得られた合金部材から、鍛造時のプレ
ス方向およびプレス方向に直角な方向に試験片を採取
し、これら試験片を用いて引張試験を行い、引張強度を
測定して、それらの結果を第１表に示した。From the alloy member obtained in this manner, test specimens were sampled in the press direction during forging and in a direction perpendicular to the press direction, a tensile test was performed using these test specimens, and the tensile strength was measured. The results are shown in Table 1.
従来例１〜２ さらに、比較のために、上記実施例１〜９および比較
例１〜８で用意したAl-Si系合金空気アトマイズ粉末を
実施例および比較例と同じ条件で圧粉成形し、得られた
圧粉体を液相焼結することなく、そのまま480℃に加熱
保持しながら、機械プレスを用いて密閉型鍛造を行い密
閉比97％以上の予備鍛造体を作製した。この予備鍛造体
を再び480℃に加熱保持しながら、加工率※10％および5
0％のもとで密閉型鍛造を行い鍛造部材を得た。このよ
うにして得られた鍛造部材には実施例および比較例と同
じ条件で溶体化・時効の熱処理を施した後、鍛造時のプ
レス方向およびプレス方向に直角な方向に試験片を採取
し、これら試験片を用いて引張り試験を行い、引張り強
度を測定して、それらの結果を第１表に示した。Conventional Examples 1-2 Further, for comparison, the Al-Si alloy air atomized powder prepared in the above Examples 1-9 and Comparative Examples 1-8 was compacted under the same conditions as the Examples and Comparative Examples, The obtained green compact was subjected to closed die forging using a mechanical press while being heated and maintained at 480 ° C. without liquid phase sintering to produce a pre-forged body having a closed ratio of 97% or more. While maintaining the pre-forged body again at 480 ° C, the processing rate * 10% and 5%
Closed die forging was performed under 0% to obtain a forged member. After subjecting the forged member thus obtained to heat treatment of solution and aging under the same conditions as in the examples and comparative examples, a test piece was sampled in the pressing direction during forging and in a direction perpendicular to the pressing direction, A tensile test was performed using these test pieces, and the tensile strength was measured. The results are shown in Table 1.
※加工率；鍛造前の部材の高さho 鍛造後の部材の高さh としたとき で表わす。* Processing rate: height of the member before forging ho when the height of the member after forging h Expressed by
第１表の結果から、この発明法の実施例１〜９により
得られた焼結鍛造部材は、従来例１〜２により得られた
鍛造部材に比べて低い鍛造加工率においても高い引張り
強度を示し、しかも引張り強度の異方性が小さいことが
わかる。 From the results in Table 1, the sintered forged members obtained according to Examples 1 to 9 of the present invention have a high tensile strength even at a lower forging rate than the forged members obtained according to Conventional Examples 1 and 2. This indicates that the anisotropy of the tensile strength is small.
〔発明の効果〕 この発明によると、高い強度を有し、しかも従来より
も強度の異方性が小さいAl-Si系合金焼結鍛造部材を提
供することができ、機械部品などの設計に際しての制約
を大幅に緩和することができるなどの効果を奏するもの
である。[Effects of the Invention] According to the present invention, it is possible to provide an Al-Si alloy sintered forged member having a high strength, and a smaller anisotropy of strength than the conventional one, and can be used for designing mechanical parts and the like. This has the effect of greatly reducing the restrictions.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 河野 通 埼玉県大宮市北袋町１―297 三菱金属 株式会社中央研究所内 (56)参考文献 特開 昭63−190102（ＪＰ，Ａ) 特開 昭51−47507（ＪＰ，Ａ) ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Toru Kono 1-297 Kitabukuro-cho, Omiya-shi, Saitama Mitsubishi Metals Central Research Laboratory (56) References JP-A-63-190102 (JP, A) JP-A-51 -47507 (JP, A)
Claims (1)
％、Fe,Ni,Mn,Crのうち１種または２種以上:0.5〜10％
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％）を有しかつ急冷凝固法により得
られたAl-Si系合金粉末を、冷間圧縮成形して圧粉体を
製造し、この圧粉体を非酸化雰囲気中で焼結したのち、
熱間鍛造を施すAl-Si系合金焼結鍛造部材の製造法にお
いて、 上記Al-Si系合金粉末は、全体が150μｍ以下であり、15
0〜100μｍの粒子が２％以上含まれること、および、 上記焼結は、液相発生温度〜液相発生温度＋50℃、の温
度範囲内で液相焼結すること、 を特徴とする機械的特性の異方性が少ないAl-Si系合金
焼結鍛造部材の製造法。(1) Si: 10-35%, Cu: 1-5%, Mg: 0.5-3.
%, One or more of Fe, Ni, Mn, and Cr: 0.5 to 10%
, And the balance: Al-Si alloy powder having a composition of Al and inevitable impurities (the above,% is% by weight) and obtained by the rapid solidification method, is subjected to cold compression molding to form a green compact After sintering this compact in a non-oxidizing atmosphere,
In the method for producing an Al-Si based alloy forged member to be subjected to hot forging, the Al-Si based alloy powder has a total
2% or more of particles having a particle size of 0 to 100 μm, and performing the liquid phase sintering in a temperature range of a liquid phase generation temperature to a liquid phase generation temperature + 50 ° C. A method for manufacturing sintered Al-Si alloy forged parts with low anisotropy in properties.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2251139A JP2730284B2 (en) | 1990-09-20 | 1990-09-20 | Manufacturing method of Al-Si alloy sintered forged parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2251139A JP2730284B2 (en) | 1990-09-20 | 1990-09-20 | Manufacturing method of Al-Si alloy sintered forged parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04131304A JPH04131304A (en) | 1992-05-06 |
| JP2730284B2 true JP2730284B2 (en) | 1998-03-25 |
Family
ID=17218255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2251139A Expired - Lifetime JP2730284B2 (en) | 1990-09-20 | 1990-09-20 | Manufacturing method of Al-Si alloy sintered forged parts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2730284B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103540810A (en) * | 2013-10-17 | 2014-01-29 | 常熟市良益金属材料有限公司 | Aluminum-silicon alloy |
| JP2017078213A (en) * | 2015-10-21 | 2017-04-27 | 昭和電工株式会社 | Aluminum alloy powder for hot forging for slide component, method for producing the same, aluminum alloy forging for slide component, and method for producing the same |
| JP2019026859A (en) * | 2017-07-25 | 2019-02-21 | 昭和電工株式会社 | Aluminum alloy forging article for high speed moving component, and manufacturing method therefor |
| CN107695339A (en) * | 2017-10-10 | 2018-02-16 | 浙江跃进机械有限公司 | A kind of preparation method of aluminum base powder metallurgy forging engine link |
| CN107695340A (en) * | 2017-10-10 | 2018-02-16 | 浙江跃进机械有限公司 | Aluminum base powder metallurgy forges the preparation method of engine link |
-
1990
- 1990-09-20 JP JP2251139A patent/JP2730284B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04131304A (en) | 1992-05-06 |
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