JPS57149443A - Aluminum alloy for cold forging that has good machinability - Google Patents
Aluminum alloy for cold forging that has good machinabilityInfo
- Publication number
- JPS57149443A JPS57149443A JP3426681A JP3426681A JPS57149443A JP S57149443 A JPS57149443 A JP S57149443A JP 3426681 A JP3426681 A JP 3426681A JP 3426681 A JP3426681 A JP 3426681A JP S57149443 A JPS57149443 A JP S57149443A
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- cold forging
- added
- content
- machinability
- 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.)
- Granted
Links
Abstract
PURPOSE: To prepare an Al alloy that provides a material having good machinability, in particular, good property in treatment of chips after cold forging, by adding Pb, Bi and As to an Al alloy containing Mn.
CONSTITUTION: An Al alloy that comprises 1W2.5wt% Mn, 0.2W0.8wt% each of at least one element of three elements, Pb, Bi and Sn, and the remainder of Al and normal impurities. When each content of Pb, Bi and Sn is less than the lower limit, the effect of improving the machinability, in particular, treatment property of chips is little. When the content is larger than the upper limit, the elements are crystallized in crystal grain boundaries of the alloy and cracks are formed in cold forging of the alloy. The addition of these low melting point metals in effective even when only one metal is added, but it is highly effective when at least two metals are added. In the latter case, it is preferable that they are added in an eutectic composition having the lowest melting point or in a composition near the eutectic one. Further, Fe impurity lowers the cold forging properties of the alloy and Si impurity lowers the forging properties of the alloy, so that the low content of them is preferable.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3426681A JPS57149443A (en) | 1981-03-10 | 1981-03-10 | Aluminum alloy for cold forging that has good machinability |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3426681A JPS57149443A (en) | 1981-03-10 | 1981-03-10 | Aluminum alloy for cold forging that has good machinability |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57149443A true JPS57149443A (en) | 1982-09-16 |
JPS6337178B2 JPS6337178B2 (en) | 1988-07-25 |
Family
ID=12409362
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3426681A Granted JPS57149443A (en) | 1981-03-10 | 1981-03-10 | Aluminum alloy for cold forging that has good machinability |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57149443A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6409966B1 (en) * | 1998-05-19 | 2002-06-25 | Reynolds Metals Company | Free machining aluminum alloy containing bismuth or bismuth-tin for free machining and a method of use |
-
1981
- 1981-03-10 JP JP3426681A patent/JPS57149443A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6409966B1 (en) * | 1998-05-19 | 2002-06-25 | Reynolds Metals Company | Free machining aluminum alloy containing bismuth or bismuth-tin for free machining and a method of use |
Also Published As
Publication number | Publication date |
---|---|
JPS6337178B2 (en) | 1988-07-25 |
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