JPH08174290A - Partially solidified working method using difference in temperature of solidus - Google Patents
Partially solidified working method using difference in temperature of solidusInfo
- Publication number
- JPH08174290A JPH08174290A JP33720894A JP33720894A JPH08174290A JP H08174290 A JPH08174290 A JP H08174290A JP 33720894 A JP33720894 A JP 33720894A JP 33720894 A JP33720894 A JP 33720894A JP H08174290 A JPH08174290 A JP H08174290A
- Authority
- JP
- Japan
- Prior art keywords
- semi
- mold
- preform
- solidus
- die
- 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
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Landscapes
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Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は材料の半溶融状態を利用
した成形加工法に関し、例えばアルミニウム合金粉末と
セラミックス粉末との混合粉末を原料として得られるア
ルミニウム基複合材ディスクロータの製造等に適用され
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forming method utilizing a semi-molten state of a material, and is applied to, for example, production of an aluminum-based composite disk rotor obtained from a mixed powder of aluminum alloy powder and ceramic powder as a raw material. To be done.
【0002】[0002]
【従来の技術及び発明が解決しようとする課題】半溶融
加工法は、原料である金属粉末を含む混合粉末を予備成
形して得られる素形材を、該素形材に液相が発生する温
度範囲である半溶融温度域で塑性加工するものである。
例えば車両用ブレーキのディスクロータをアルミニウム
合金粉末とセラミックス粉末の混合粉末で製造する場
合、上記の半溶融加工法のうち半溶融プレス加工法によ
れば、この混合粉末を予備成形した素形材を金型内に置
き、これをアルミニウム合金の半溶融温度域に加熱して
加圧成形することにより行う。2. Description of the Related Art In the semi-melt processing method, a raw material obtained by preforming a mixed powder containing a metal powder as a raw material produces a liquid phase in the raw material. Plastic working is performed in the semi-melting temperature range, which is the temperature range.
For example, when a disk rotor for a vehicle brake is manufactured with a mixed powder of aluminum alloy powder and ceramics powder, according to the semi-melt press working method among the above-mentioned semi-melt working methods, a raw material obtained by pre-forming this mixed powder is formed. It is placed in a mold, heated to a semi-melting temperature range of the aluminum alloy, and pressure-molded.
【0003】しかしながら素形材を金型内でその半溶融
温度域に加熱保持して該金型内で加圧成形すると、発生
した液相の飛散により素形材材料が失われてしまい所定
形状が得られにくい欠点がある。また上記半溶融プレス
加工法では金型温度が素形材の固相線温度に達するた
め、金型材が熱間金型用鋼であるSKD材であっても硬
さが低下してしまい金型内面に被加工材によるカジリが
起き易いといった問題もある。However, if the raw material is heated and held in the mold in the semi-melting temperature range and pressure-molded in the mold, the generated liquid phase is scattered and the raw material material is lost. Is difficult to obtain. Further, in the above-mentioned semi-melt press working method, the die temperature reaches the solidus temperature of the base material, so that even if the die material is SKD material which is hot die steel, the hardness decreases and the die There is also a problem that galling is likely to occur on the inner surface due to the work material.
【0004】[0004]
【課題を解決するための手段】本発明は半溶融加工法に
おけるこれらの問題、即ち金型の摩耗と液相の飛散損失
を防止したもので、金属粉末を含む混合粉末を予備成形
した素形材を金型内に置いて該素形材をその半溶融温度
域で加圧成形する方法において、該素形材よりも固相線
温度が少なくとも50度以上(好ましくは70〜90度)高い
金属シール材を該金型内面との間に介して、該素形材を
金型内に置いた後加圧成形することを特徴とする固相線
温度差を利用した半溶融加工法である。SUMMARY OF THE INVENTION The present invention prevents these problems in the semi-melt processing method, that is, the wear of the mold and the scattering loss of the liquid phase. In a method of placing a material in a mold and press-molding the raw material in the semi-melting temperature range, the solidus temperature is at least 50 degrees higher (preferably 70 to 90 degrees) higher than that of the raw material. A semi-melt processing method utilizing a solidus temperature difference, characterized in that the raw material is placed in the mold via a metal sealant between the inner surface of the mold and pressure molding. .
【0005】[0005]
【作用】上記のアルミニウム基複合材ディスクロータの
半溶融プレス加工等の場合、金型のカジリ防止には黒鉛
や二硫化モリブデン等の固体潤滑剤が一般的に使われて
いた。しかしながらこの場合半溶融加工温度は 500〜66
0 ℃と高温であるために、上記固体潤滑剤は十分なカジ
リ防止効果を示さなかった。In the semi-melt press working of the above aluminum-based composite disk rotor, solid lubricants such as graphite and molybdenum disulfide are generally used for preventing galling of the mold. However, in this case the semi-melt processing temperature is 500-66.
Due to the high temperature of 0 ° C., the above solid lubricant did not exhibit a sufficient anti-galling effect.
【0006】そこで本発明では、予備成形した素形材よ
りも固相線温度の高い材料を、即ち素形材の半溶融温度
域よりも固相線温度の高い材料をシール材として、該素
形材と金型内面との間に介在させることにより、該素形
材をその半溶融温度域で加圧成形する際に、該素形材で
は液相が発生しているが、該シール材は常に固相状態で
あるために素形材の液相が金型に付着するといった欠点
がなくなる。Therefore, in the present invention, a material having a solidus temperature higher than that of the preformed raw material, that is, a material having a solidus temperature higher than the semi-melting temperature range of the raw material is used as the sealing material. By interposing between the profile and the inner surface of the mold, when the profile is pressure-molded in the semi-melting temperature range, a liquid phase is generated in the profile, but the sealing material Since the solid phase is always in the solid state, the defect that the liquid phase of the raw material adheres to the mold is eliminated.
【0007】さらにこのシール材は素形材よりも50度以
上高い固相線温度を有するので素形材の半溶融加工時に
も溶融することはないが軟化した状態にあり、該シール
材の圧縮強度は無視できるほど小さく成形圧力の損失は
無視できるほど少ない。また素形材とシール材は予め所
定形状に成形しておくので生産性も大幅に向上する。Furthermore, since this sealing material has a solidus temperature higher than that of the molding material by 50 ° C. or more, it does not melt during the semi-melt processing of the molding material but is in a softened state, and the sealing material is compressed. The strength is negligible and the loss of molding pressure is negligible. Further, since the material and the sealing material are molded in a predetermined shape in advance, the productivity is greatly improved.
【0008】[0008]
【実施例】以下に本発明の一実施例を図1により説明す
る。耐熱性に優れたアルミニウム合金(Al−8wt%F
e、固相線温度: 653℃)粉末にアルミナ粒子を30重量
%添加した混合粉末を用意し、この混合粉末を成形温度
200℃、加圧力 300MPaでプレス予備成形して円柱形
の素形材を得た。この素形材の外径寸法は、下記の半溶
融プレス成形用金型の素形材収容円形孔の内径寸法より
全周にわたって一様に1mm小さいものである。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. Aluminum alloy with excellent heat resistance (Al-8wt% F
e, solidus temperature: 653 ° C) Prepare a mixed powder in which 30% by weight of alumina particles is added to the powder, and the mixed powder is molded at
A columnar shaped material was obtained by press preforming at 200 ° C. and a pressure of 300 MPa. The outer diameter of this base material is uniformly 1 mm smaller than the inner diameter of the base material accommodating circular hole of the mold for semi-melt press molding described below by 1 mm.
【0009】この素形材(1)を、図1に示すように半
溶融プレス成形用金型(2)の素形材収容円形孔内であ
って、下部加圧パンチ(3)上に置き、さらに該素形材
(1)と該金型(2)の内面との間隙に厚さ1mm弱で高
さが素形材(1)の厚さの2倍の円筒状リン銅合金製シ
ール材(4)(固相線温度: 730℃)を装入した。As shown in FIG. 1, the base material (1) is placed on the lower pressure punch (3) in the base material accommodating circular hole of the mold for semi-melt press molding (2). And a cylindrical phosphor copper alloy seal having a thickness of less than 1 mm and a height twice the thickness of the blank (1) in the gap between the blank (1) and the inner surface of the mold (2). Material (4) (solidus temperature: 730 ° C.) was charged.
【0010】次に上部加圧パンチ(5)をセットして、
上下部加圧パンチ(3)(5)により 100MPaの加圧
力を加えた後、素形材(1)のアルミニウム合金の半溶
融温度である 650℃に加熱保持した。所定時間保持後、
さらに 200MPaに加圧力を上げて半溶融プレス成形を
行い、金型より取出し、冷却後シール材(4)を機械加
工により除去して成形体(6)を得た。その後金型
(2)の内面を詳細に調べたがカジリ等の傷は全くなか
った。また素形材の材料の損失も全くなかった。Next, the upper pressure punch (5) is set,
After applying a pressure of 100 MPa by the upper and lower pressure punches (3) and (5), the aluminum alloy of the raw material (1) was heated and maintained at 650 ° C. which is a semi-melting temperature. After holding for a predetermined time,
The pressure was further increased to 200 MPa to perform semi-melt press molding, the mold was taken out from the mold, and after cooling, the sealing material (4) was removed by machining to obtain a molded body (6). After that, the inner surface of the mold (2) was examined in detail, but there was no scratch such as galling. In addition, there was no material loss of the raw material.
【0011】[0011]
【発明の効果】このように本発明によれば、半溶融加工
法において素形材材料の散逸による損失がなく、さらに
金型のカジリ等の傷や摩耗等もなくなり寿命も延びるの
でコスト低減が図れ、アルミニウム基複合材ディスクロ
ータ等の製造における生産性を向上させることが可能と
なる等顕著な効果を奏する。As described above, according to the present invention, in the semi-melt processing method, there is no loss due to the dissipation of the raw material material, and further, there is no scratch or abrasion of the metal mold and the like, and the life is extended, so that the cost can be reduced. As a result, it is possible to improve productivity in manufacturing an aluminum-based composite disc rotor and the like, which is a significant effect.
【図面の簡単な説明】[Brief description of drawings]
【図1】本発明の一実施例を示す説明図である。FIG. 1 is an explanatory diagram showing an embodiment of the present invention.
1 素形材 2 半溶融プレス成形用金型 3 下部加圧パンチ 4 シール材 5 上部加圧パンチ 6 成形体 DESCRIPTION OF SYMBOLS 1 Form material 2 Semi-melt press molding die 3 Lower pressure punch 4 Seal material 5 Upper pressure punch 6 Molded body
Claims (2)
素形材を金型内に置いて該素形材をその半溶融温度域で
加圧成形する方法において、該素形材よりも固相線温度
が少なくとも50度以上高い金属シール材を該金型内面と
の間に介して、該素形材を金型内に置いた後加圧成形す
ることを特徴とする固相線温度差を利用した半溶融加工
法。1. A method of placing a preform, in which a mixed powder containing a metal powder is preformed, in a mold, and press-molding the preform in a semi-melting temperature range thereof. A solidus temperature difference characterized in that the metal seal material having a high phase line temperature of at least 50 ° C. or higher is placed between the mold material and the mold material and then pressure-molded. Semi-melt processing method using.
相線温度よりも70〜90度高いことを特徴とする請求項1
に記載の半溶融加工法。2. The solidus temperature of the metal seal material is 70 to 90 degrees higher than the solidus temperature of the matrix material.
The semi-melt processing method described in.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP33720894A JPH08174290A (en) | 1994-12-26 | 1994-12-26 | Partially solidified working method using difference in temperature of solidus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP33720894A JPH08174290A (en) | 1994-12-26 | 1994-12-26 | Partially solidified working method using difference in temperature of solidus |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH08174290A true JPH08174290A (en) | 1996-07-09 |
Family
ID=18306458
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP33720894A Pending JPH08174290A (en) | 1994-12-26 | 1994-12-26 | Partially solidified working method using difference in temperature of solidus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH08174290A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011523592A (en) * | 2008-05-23 | 2011-08-18 | ロバルマ,ソシエダッド アノニマ | Method and apparatus for manufacturing a workpiece, in particular a forming tool or a forming tool part |
-
1994
- 1994-12-26 JP JP33720894A patent/JPH08174290A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011523592A (en) * | 2008-05-23 | 2011-08-18 | ロバルマ,ソシエダッド アノニマ | Method and apparatus for manufacturing a workpiece, in particular a forming tool or a forming tool part |
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