- 专利标题： Free-machining powder metallurgy steel articles and method of making same
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申请号： US15346885申请日： 2016-11-09
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公开(公告)号： US10704125B2公开(公告)日： 2020-07-07
- 发明人: Olivier Schiess , Pierre Marechal , Gregory J. Del Corso , Alberto Polar-Rosas
- 申请人： CRS Holdings, Inc. , Olivier Schiess , Pierre Marechal
- 申请人地址： US DE Wilmington
- 专利权人： CRS HOLDINGS, INC.
- 当前专利权人： CRS HOLDINGS, INC.
- 当前专利权人地址： US DE Wilmington
- 代理机构： Dann, Dorfman, Herrell and Skillman, P.C.
- 主分类号： B22F3/24
- IPC分类号： B22F3/24 ; B22F3/15 ; B22F5/12 ; B22F9/06 ; C21D9/52 ; C21D8/06 ; C21D6/00 ; C22C38/02 ; C22C38/04 ; C22C38/08 ; C22C38/12 ; C22C38/18 ; C22C38/24 ; C22C38/40 ; C22C38/16 ; C22C38/42 ; C22C38/60 ; C22C38/22 ; C22C38/44 ; C22C33/02 ; C22C38/46 ; C21D1/32 ; B22F9/08 ; C22C38/00
摘要：
A method of making a small diameter elongated steel article such as wire or strip is disclosed. The method includes the step of melting a steel alloy having the following weight percent composition C0.88-1.00 Mn0.20-0.80 Si0.50max. P0.050max. S0.010-0.100 Cr0.15-0.90 Ni0.10-0.50 Mo0.25max. Cu0.08-0.23 V0.025-0.15 N0.060max. O0.040max. and the balance is iron and usual impurities. The method includes melting the alloy, atomizing the molten alloy to make a pre-alloyed metal powder, consolidating the metal powder to substantially full density, and then hot working the consolidated metal powder to form an intermediate elongated article. The method further includes a multi-step heat treating process. A small diameter, elongated steel article having enhanced machinability is also disclosed.
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