JP2713307B2 - Heat treatment method of aluminum powder alloy - Google Patents
Heat treatment method of aluminum powder alloyInfo
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- JP2713307B2 JP2713307B2 JP25570288A JP25570288A JP2713307B2 JP 2713307 B2 JP2713307 B2 JP 2713307B2 JP 25570288 A JP25570288 A JP 25570288A JP 25570288 A JP25570288 A JP 25570288A JP 2713307 B2 JP2713307 B2 JP 2713307B2
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Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、アルミニウム系合金粉末の熱間成形品の熱
処理方法に関するものであり、さらに詳しく述べるなら
ば、高温での強度に優れたAl−Si系合金粉末の熱間成形
品の応力腐食割れ感受性を抑える熱処理方法に関するも
のである。本発明の熱処理方法は強度向上のために施す
時効処理に於て、応力腐食割れ感受性を高くせず強度値
を保証できるものである。Description: TECHNICAL FIELD The present invention relates to a method for heat-treating a hot-formed product of an aluminum-based alloy powder. More specifically, the present invention relates to an aluminum alloy having excellent strength at high temperatures. The present invention relates to a heat treatment method for suppressing stress corrosion cracking susceptibility of a hot formed product of a Si alloy powder. The heat treatment method of the present invention can guarantee the strength value without increasing the sensitivity to stress corrosion cracking in the aging treatment for improving the strength.
（従来の技術） Al−Si系合金は、高強度、高剛性を有し、優れた耐摩
耗性を示すことから、鉄合金を代替し、航空宇宙・自動
車部品等の軽量化、高負荷の要求を満足できる材料とし
て、盛んに研究されている。(Conventional technology) Al-Si alloys have high strength and high rigidity and show excellent wear resistance. Therefore, they replace iron alloys, reduce the weight of aerospace and automotive parts, and reduce the load on high loads. It is actively studied as a material that can satisfy the requirements.
本発明者等は下記特許出願においてAl−Si系急冷粉
末、およびこの粉末を成形した耐摩耗性および高温強度
にすぐれた成形体を提案した：特願昭59−13040号（特
願昭57−119901号）；特開昭59−13041号（特願昭57−1
19902号）；特開昭59−59214号（特願昭57−167577
号）；特開昭59−59856号（特願昭57−167578号）。The present inventors have proposed, in the following patent application, Al-Si quenched powder and a molded product obtained by molding this powder and having excellent wear resistance and high-temperature strength: Japanese Patent Application No. 59-13040 (Japanese Patent Application No. 57-13040). 119901); JP-A-59-13041 (Japanese Patent Application No. 57-1)
19902); JP-A-59-59214 (Japanese Patent Application No. 57-167577)
JP-A-59-59856 (Japanese Patent Application No. 57-167578).
Al−Si系溶解合金を構造材として利用する場合、その
他のアルミニウム合金と同様に、T6処理に代表される熱
処理にて、強度の向上を図らなければならない。この熱
処理は、強度が向上すればするほど、逆に、応力腐食割
れ感受性を高めるため、部品としての信頼性が著しく損
なわれることとなる。したがって、従来よりAl合金を腐
食環境で使用される構造材に適用するにあたっては、組
成の改良や熱処理方法の最適化の努力がなされてきた。When an Al-Si-based molten alloy is used as a structural material, the strength must be improved by a heat treatment represented by T6 treatment, like other aluminum alloys. In the heat treatment, as the strength is improved, the susceptibility to stress corrosion cracking is increased, and consequently, the reliability of the component is significantly impaired. Therefore, in applying the Al alloy to a structural material used in a corrosive environment, efforts have conventionally been made to improve the composition and optimize the heat treatment method.
（発明が解決しようとする課題） 本発明者等は、Al−Si系合金粉末の熱間成形品を構造
材として適用するための研究を行ない、T6処理では高強
度が得られるが、応力腐食割れ感受性が高められ、高い
応力が加わった状態で塩分を含む水や凍結防止剤などの
腐食性媒体にさらされる部品としての信頼性が損なわれ
ることことを見出した。したがって、Al−Si系合金粉末
の熱間成形品をこのような部品に使用するには応力腐食
割れ（以下、SCCという）を抑えて、さらにその強度の
向上を図る対策が求められている。(Problems to be Solved by the Invention) The present inventors have conducted research for applying a hot-formed product of an Al-Si alloy powder as a structural material, and high strength can be obtained by T6 treatment, but stress corrosion It has been found that the crack susceptibility is enhanced, and the reliability as a part exposed to corrosive media such as water containing salt and antifreeze under high stress is impaired. Therefore, in order to use a hot-formed product of an Al-Si alloy powder for such a component, there is a need for a measure for suppressing stress corrosion cracking (hereinafter referred to as SCC) and further improving its strength.
したがって、本発明は、高強度耐摩耗性Al−Si系合金
粉末の熱間成形品の耐SCC感受性を抑えつつ、強度の向
上が図れる熱処理方法を提供することを目的とする。Accordingly, an object of the present invention is to provide a heat treatment method capable of improving the strength while suppressing the SCC resistance of a hot-formed product of a high-strength wear-resistant Al-Si-based alloy powder.
（課題を解決するための手段） 前述の問題点を解決するために、本発明者らは、時効
条件を検討した結果、第１は過時効状態まで時効し、強
度は若干低下するもののSCC感受性を落とす方法、第２
は、時効を二段に分け定温と高温の二段時効により、最
高強度を維持しつつSCC感受性を抑制する方法を見出し
た。(Means for Solving the Problems) In order to solve the above-mentioned problems, the present inventors examined the aging conditions. Method of dropping, the second
Has found a method of suppressing SCC sensitivity while maintaining the maximum strength by dividing the aging into two stages and aging at constant temperature and high temperature.
本発明の第１は、（１）Si:10〜30wt％,Cu:0.5〜5.0w
t％,Mg:0.3〜3.5wt％，およびFe,Mn,Niを単独もしくは
組合わせで、0.5〜10.0wt％を含み、残部Alおよび不可
避不純物からなるAl−Si系合金粉末の熱間成形品を、46
0〜510℃で１〜４時間加熱後水冷し、210〜240℃で0.5
〜4.0時間時効を施す方法であり、その第２は、（２）
上記組成のAl−Si系合金の粉末成形体を、460℃〜510℃
で１〜４時間加熱後水冷し、室温で４日以上または150
〜200℃で0.5〜4.0時間時効し、次に210〜240℃で0.5〜
4.0時間時効する２段時効を行なう方法である。The first aspect of the present invention is (1) Si: 10 to 30 wt%, Cu: 0.5 to 5.0 w
Hot-formed Al-Si alloy powder containing 0.5% to 10.0% by weight of t%, Mg: 0.3 to 3.5% by weight, and Fe, Mn, and Ni alone or in combination. , 46
After heating at 0-510 ° C for 1-4 hours, water-cooling and
Aging for ~ 4.0 hours, the second of which is (2)
A powder compact of the Al-Si based alloy having the above composition, 460 ° C ~ 510 ° C
At room temperature for 1 to 4 hours, then water-cooled,
Aging at ~ 200 ° C for 0.5-4.0 hours, then at 210-240 ° C for 0.5-4.0 hours
This is a two-stage aging method that ages for 4.0 hours.
以下、本発明の構成を詳しく説明する。 Hereinafter, the configuration of the present invention will be described in detail.
本発明の熱処理が適用できる合金は、Al−Si系の合金
粉末の熱間成形品であり、その組成は、Si:10〜30wt％,
Cu:0.5〜5.0wt％,Mg:0.3〜3.5wt％,Fe,Mn,Niを単独もし
くは組合わせで、0.5〜10.0wt％の範囲で含有するもの
である。これらの成分の含有量範囲は材料特性に起因し
て制約されている。Siは、硬質粒子形成による耐摩耗性
を発揮させるために10wt％以上は必要であり、30wt％を
超えると靭性の低下を招いて利用できくなる部品がなく
なる。Cu及びMgは時効硬化元素であり、熱処理によって
強度を向上させるために、最低限それぞれ0.5wt％およ
び0.3％含有させる必要がある。Cu及びMgがそれぞれ5.0
wt％および3.5wt％を超えるとその効果は飽和する。F
e、MnおよびNiは、高温強度の向上の目的のために添加
される元素で、最低0.5wt％（組合せ添加の場合は合計
量）必要であり、一方10.0wt％を超えると靭性の低下を
招き使用できる部品が著しく制約される。Mn,Ni,Feは単
独添加の場合よりも組合せの方がSCC感受性が低下す
る。したがって、本発明の熱処理を、Mn等を組合せ添加
したAl−Si系合金粉末の熱間成形品に適用すると熱処理
の効果が一層高められる。The alloy to which the heat treatment of the present invention can be applied is a hot-formed product of an Al-Si alloy powder, the composition of which is Si: 10 to 30 wt%,
Cu: 0.5 to 5.0 wt%, Mg: 0.3 to 3.5 wt%, Fe, Mn, Ni alone or in combination in the range of 0.5 to 10.0 wt%. The content ranges of these components are restricted by material properties. Si is required to be at least 10 wt% in order to exhibit wear resistance due to the formation of hard particles, and if it exceeds 30 wt%, there will be no parts that can reduce the toughness and become unusable. Cu and Mg are age hardening elements. In order to improve strength by heat treatment, it is necessary to contain at least 0.5% by weight and 0.3% by weight, respectively. Cu and Mg are each 5.0
When the content exceeds wt% and 3.5 wt%, the effect is saturated. F
e, Mn and Ni are elements added for the purpose of improving the high-temperature strength, and must be at least 0.5 wt% (the total amount in the case of combination addition). The parts that can be used for invitation are significantly restricted. The combination of Mn, Ni and Fe has lower SCC susceptibility than the case of single addition. Therefore, when the heat treatment of the present invention is applied to a hot-formed product of an Al—Si alloy powder to which Mn or the like is added in combination, the effect of the heat treatment is further enhanced.
続いて、熱処理について説明する。 Subsequently, the heat treatment will be described.
第１発明において、過時効処理は、210〜240℃で0.5
〜4.0時間行なう。この過時効処理は、通常のT6処理条
件（490℃×6Hr溶体化後、温水（80℃）焼入れ）より高
温側で時効するもので、この人工時効により析出してく
る強化相の粗大化を図るように過時効を行なう。過時効
温度が210℃未満では通常のT6条件になり、SCC感受性を
抑えることが不可能であるため、210℃以上の温度とす
る。また過時効温度が240℃より高いと強度の低下が著
しく、熱処理の効果が消失してしまうから、240℃以下
の温度とする。過時効時間についても同様であり、0.5
時間未満ではSCC感受性が高く、４時間を超えると強度
が低下してしまうことになるため、0.5〜４時間の範囲
とする。In the first invention, the overaging treatment is performed at 210 to 240 ° C. for 0.5 hour.
Perform for ~ 4.0 hours. This over-aging treatment ages at a higher temperature than the usual T6 treatment conditions (490 ° C x 6Hr solution, then quenched with hot water (80 ° C)), and the coarsening of the strengthening phase that precipitates due to this artificial aging. Perform overage as indicated. If the overaging temperature is lower than 210 ° C., a normal T6 condition is established, and it is impossible to suppress the SCC sensitivity. If the overaging temperature is higher than 240 ° C., the strength is remarkably reduced and the effect of the heat treatment is lost. The same is true for the overaging time, with 0.5
If the time is less than the time, the SCC sensitivity is high, and if the time is more than 4 hours, the strength is reduced. Therefore, the range is 0.5 to 4 hours.
次に、二段時効を特徴とする第２発明の場合は、１段
目の時効処理では室温から200℃の温度で時効硬化を生
じるように行ない、軟化が生じる前に処理を中止する。
一段目の時効を室温で行なう場合は、４日以上自然時効
することにより、この要件が満たされる。また、150℃
〜200℃で一段目の時効を行なう場合は0.5〜4.0時間の
人工時効により上記条件が満たされる。Next, in the case of the second invention characterized by two-stage aging, in the first-stage aging treatment, age hardening is performed at a temperature from room temperature to 200 ° C., and the treatment is stopped before softening occurs.
If the first aging is performed at room temperature, this requirement is satisfied by natural aging for 4 days or more. Also, 150 ℃
When performing the first stage aging at ~ 200 ° C, the above conditions are satisfied by artificial aging for 0.5 to 4.0 hours.
第１段の時効処理後、第１発明の過時効条件で時効す
る。この方法は、前段の自然時効もしくは人工時効によ
り、材料の強度をできるだけ高め、その後、過時効によ
りSCC感受性を落とす方法である。この方法によれば、S
CC感受性を低くするとともに、最高値に近い強度を維持
できる。この方法は、一段目の時効析出物を低温の時効
で微細にするところに特徴があり、強度と耐SCC性の両
者を満足させるための最適な方法といえる。この１段目
の時効条件で室温とは、通常の気候で、０〜40℃を指
す。室温で最高強度に達するのに最低４日以上必要であ
り、室温で４日以上処理しても軟化は起こらない。150
〜200℃の人工時効条件も同様に、その範囲内で強度を
最高値にすることができる。After the aging treatment of the first stage, aging is performed under the overaging condition of the first invention. In this method, the strength of the material is increased as much as possible by natural aging or artificial aging in the preceding stage, and then the SCC sensitivity is reduced by overaging. According to this method, S
The CC sensitivity can be lowered and the strength close to the maximum value can be maintained. This method is characterized in that the first-stage aging precipitate is refined by aging at a low temperature, and can be said to be an optimal method for satisfying both the strength and the SCC resistance. The room temperature in the first-stage aging condition means 0 to 40 ° C. in a normal climate. It takes at least 4 days to reach maximum strength at room temperature, and softening does not occur after treatment at room temperature for more than 4 days. 150
Similarly, artificial aging conditions of ~ 200 ° C can maximize strength within that range.
１段目の時効が終了した後直ちに昇温して、あるいは
一旦室温まで冷却した後に２段目の時効を行なう。この
温度，時間およびこれらの限定理由は第１発明で述べと
とおりである。Immediately after completion of the first-stage aging, the temperature is raised, or once cooled to room temperature, the second-stage aging is performed. The temperature, time, and the reasons for limitation are as described in the first invention.
第１および第２発明の時効処理の前段として必要な溶
体化処理は、460℃〜510℃で１〜４時間の加熱後水冷を
することにより行なう。溶体化処理は、Cu,Mgなどの時
効硬化元素を十分にマトリックスに溶かし込み、氷冷に
よっての状態を凍結することを意図する。そのために
は、460℃以上の温度での加熱が必要である。加熱温度
が510℃を超えると固溶効果は飽和し、むしろBlisterの
発生の危険があるから、この温度以下に抑えるべきであ
る。加熱時間は、固溶効果を達成するために１時間以上
必要であり、一方４時間を超えると効果が飽和してしま
う。よって、加熱温度および時間は、上記の範囲に限定
した。また、加熱後の水冷は50℃以下の水にすばやく投
込むことにより行なう。The solution treatment required as a pre-stage of the aging treatment of the first and second inventions is performed by heating at 460 ° C. to 510 ° C. for 1 to 4 hours and then cooling with water. The solution treatment is intended to sufficiently dissolve the age hardening elements such as Cu and Mg into the matrix and freeze the state by ice cooling. For that purpose, heating at a temperature of 460 ° C. or more is required. When the heating temperature exceeds 510 ° C., the solid solution effect is saturated, and rather there is a risk of occurrence of Blister. Therefore, the temperature should be kept below this temperature. The heating time must be at least 1 hour to achieve the solid solution effect, while if it exceeds 4 hours, the effect is saturated. Therefore, the heating temperature and time were limited to the above ranges. Water cooling after heating is performed by rapidly pouring into water at 50 ° C. or lower.
上記したAl−Si系合金粉末の熱間成形品に硬質粒子を
添加した材料にも、本発明法の適用は可能である。硬質
粒子としては、Al2O3,SiC,Si3N4,SiO2,ZrO2等を単独も
しくは組合わせて15.0wt％以下添加可能である。添加量
が0.1wt％以上で耐摩耗性および強度向上の顕著な効果
が認られる。好ましい添加量は0.5wt％以上である。硬
質粒子の添加量が15wt％を超えると、耐摩耗性および強
度向上の効果が飽和し、むしろ靭性が低下する。特に、
本発明では熱処理による強度向上に相応して靭性が低下
するため、靭性低下をもたらす硬質粒子の15wt％以上の
添加は避けるべきである。The method of the present invention can be applied to a material in which hard particles are added to a hot-formed product of the Al-Si alloy powder described above. As the hard particles, Al 2 O 3 , SiC, Si 3 N 4, SiO 2 , ZrO 2 and the like can be added alone or in combination at 15.0 wt% or less. When the addition amount is 0.1 wt% or more, a remarkable effect of improving wear resistance and strength is recognized. A preferable addition amount is 0.5 wt% or more. When the addition amount of the hard particles exceeds 15% by weight, the effects of improving the wear resistance and the strength are saturated, and the toughness is rather lowered. Especially,
In the present invention, the toughness is reduced in accordance with the improvement in the strength by the heat treatment. Therefore, the addition of 15 wt% or more of the hard particles that cause the reduction in toughness should be avoided.
本発明の熱処理を適用するAl−Si系合金粉末の熱間成
形品は粉末の熱間成形品に適用することができる。熱間
成形品は密度および組織の緻密度が高く、強度が高いた
めに、構造用部品、耐摩耗部品などとして優れている
が、その半面SCC感受性が高くなるという難点がある。
よって、SCC感受性を低くすることにより部品の信頼性
を確保することができる。ここで熱間成形法は、プレ
ス、圧延、押出などの各種方法である。The hot compact of Al-Si alloy powder to which the heat treatment of the present invention is applied can be applied to a hot compact of powder. The hot-formed product has high density and structure, and is excellent as a structural component or a wear-resistant component because of its high strength. However, it has a drawback that its SCC sensitivity is high.
Therefore, the reliability of components can be ensured by lowering the SCC sensitivity. Here, the hot forming method is various methods such as pressing, rolling, and extrusion.
（実施例） 以下、本発明を実施例をあげて説明する。(Examples) Hereinafter, the present invention will be described with examples.
第１表に示すAl−Si系合金の粉末をアトマイズにより
調製した。アトマイズしたAl合金粉末を100メッシュで
分級後原料粉末とし、No.2,5,7はセラミックス粒子をＶ
型ブレンダーにて混合し原料粉末とした。Powders of Al-Si alloys shown in Table 1 were prepared by atomization. After classifying the atomized Al alloy powder with 100 mesh, it was used as the raw material powder.
The mixture was mixed with a mold blender to obtain a raw material powder.
これらの粉末を温間（200〜300℃）にて予備成形し
て、密度比70％のビレットとし、不活性雰囲気で400〜5
00℃にて脱ガス後、400〜500℃にて熱間押出法により丸
棒に成形した。これらの丸棒から試験片を採取し、次の
熱処理を施し、硬度、引張試験、SCC試験にて評価し
た。These powders are preformed in a warm state (200 to 300 ° C.) to form a billet having a density ratio of 70%, and 400 to 5% in an inert atmosphere.
After degassing at 00 ° C, it was formed into a round bar by hot extrusion at 400 to 500 ° C. Test pieces were taken from these round bars, subjected to the following heat treatment, and evaluated by hardness, tensile test, and SCC test.
熱処理 Ａ （従来法） T6:490℃ 2hrWQ 175℃ 8hr 時効 ・ Ｂ （過時効） T7:490℃ 2hrWQ 230℃ 2hr 時効 ・ Ｃ （２段時効） T73:490℃ 2hrWQ RT 4day 放置後 230℃ 2hr 時効 第２（ａ），（ｂ）表に評価結果を示す。これらの表
から、本発明により、強度の向上をT6材レベルに維持し
つつ、耐SCC性を著しく改善できることが分かる。Heat treatment A (Conventional method) T6: 490 ℃ 2hrWQ 175 ℃ 8hr aging ・ B (overaging) T7: 490 ℃ 2hrWQ 230 ℃ 2hr aging ・ C (two-stage aging) T73: 490 ℃ 2hrWQ RT 4day aging at 230 ℃ 2hr Tables 2 (a) and (b) show the evaluation results. From these tables, it can be seen that the present invention can significantly improve the SCC resistance while maintaining the strength improvement at the T6 material level.
（発明の効果） 本発明により、耐SCC特性を劣化させることなく、強
度の向上を熱処理により図ることができるので、Al−Si
系合金の粉末成形体を腐食環境で使用される部品への適
用の拡大が期待できる。(Effect of the Invention) According to the present invention, the strength can be improved by heat treatment without deteriorating the SCC resistance, so that Al-Si
It can be expected that the application of the powder compact of the base alloy to parts used in a corrosive environment will be expanded.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 // Ｃ２２Ｆ 1/00 ６１２ 8719−4Ｋ Ｃ２２Ｆ 1/00 ６１２ ６２７ 8719−4Ｋ ６２７ ６２８ 8719−4Ｋ ６２８ ６４０ 8719−4Ｋ ６４０Ａ ６９１ 8719−4Ｋ ６９１Ｂ 8719−4Ｋ ６９１Ｃ ──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. 6 Identification number Agency reference number FI Technical indication // C22F 1/00 612 8719-4K C22F 1/00 612 627 8719-4K 627 628 8719-4K 628 640 8719-4K 640A 691 8719-4K 691B 8719-4K 691C
Claims (3)
3.5wt％，およびFe,Mn,Niを単独もしくは組合わせで、
0.5〜10.0wt％を含み、残部Alおよび不可避不純物から
なるAl−Si系合金粉末の熱間成形品を460〜510℃で１〜
４時間加熱後水冷し、210〜240℃で0.5〜4.0時間有効を
施すことを特徴とするアルミニウム粉末合金の熱処理方
法(1) Si: 10 to 30 wt%, Cu: 0.5 to 5.0 wt%, Mg: 0.3 to
3.5wt% and Fe, Mn, Ni alone or in combination
A hot-formed product of an Al-Si alloy powder containing 0.5 to 10.0 wt%, with the balance being Al and inevitable impurities,
A heat treatment method for aluminum powder alloys, wherein the heat treatment is carried out for 4 hours and then water-cooled, and the treatment is effected at 210 to 240 ° C. for 0.5 to 4.0 hours.
3.5wt％，およびFe,Mn,Niを単独もしくは組合わせで、
0.5〜10.0wt％を含み、残部Alおよび不可避不純物から
なるAl−Si系合金粉末の熱間成形品を、460〜510℃で１
〜４時間加熱後水冷し、室温で４日以上または150〜200
℃で0.5〜4.0時間時効し、次に210〜240℃で0.5〜4.0時
間時効を行うことを特徴とするアルミニウム粉末合金の
熱処理方法。(2) Si: 10 to 30 wt%, Cu: 0.5 to 5.0 wt%, Mg: 0.3 to
3.5wt% and Fe, Mn, Ni alone or in combination
A hot-formed product of an Al-Si alloy powder containing 0.5 to 10.0 wt%, the balance being Al and unavoidable impurities,
After heating for ~ 4 hours, water-cool and at room temperature for more than 4 days or 150 ~ 200
A method for heat treating an aluminum powder alloy, comprising aging at 0.5 to 4.0 hours at a temperature of 210C to 0.5 to 4.0 hours.
Al2O3,SiC,Si3N4,SiO2およびZrO2の群からなるセラミッ
クス粒子の１種以上を15.0wt％以下含有することを特徴
とする請求項１または２記載のアルミニウム粉末合金の
熱処理方法。3. A hot-formed product of an Al-Si alloy powder,
3. The aluminum powder alloy according to claim 1, wherein said aluminum powder alloy contains 15.0 wt% or less of at least one kind of ceramic particles comprising a group of Al 2 O 3 , SiC, Si 3 N 4 , SiO 2 and ZrO 2 . Heat treatment method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25570288A JP2713307B2 (en) | 1988-10-11 | 1988-10-11 | Heat treatment method of aluminum powder alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25570288A JP2713307B2 (en) | 1988-10-11 | 1988-10-11 | Heat treatment method of aluminum powder alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02104641A JPH02104641A (en) | 1990-04-17 |
| JP2713307B2 true JP2713307B2 (en) | 1998-02-16 |
Family
ID=17282445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25570288A Expired - Fee Related JP2713307B2 (en) | 1988-10-11 | 1988-10-11 | Heat treatment method of aluminum powder alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2713307B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02285044A (en) * | 1989-04-26 | 1990-11-22 | Mitsubishi Materials Corp | Al-si series alloy powder forged member having excellent wear resistance and low thermal expansion coefficient |
| JPH07143629A (en) * | 1993-11-18 | 1995-06-02 | Furukawa Electric Co Ltd:The | Wire compressor |
| JP7011943B2 (en) * | 2018-01-19 | 2022-02-10 | 昭和電工株式会社 | Aluminum alloy substrate for magnetic recording medium and its manufacturing method, substrate for magnetic recording medium, magnetic recording medium and hard disk drive |
-
1988
- 1988-10-11 JP JP25570288A patent/JP2713307B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02104641A (en) | 1990-04-17 |
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