- 专利标题: Pre-alloyed iron-based powder, an iron-based powder mixture containing the pre-alloyed iron-based powder and a method for making pressed and sintered components from the iron-based powder mixture
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申请号: US15510883申请日: 2015-09-15
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公开(公告)号: US10465268B2公开(公告)日: 2019-11-05
- 发明人: Ola Bergman
- 申请人: HÖGANÄS AB (PUBL)
- 申请人地址: SE Höganäs
- 专利权人: HÖGANÄS AB (PUBL)
- 当前专利权人: HÖGANÄS AB (PUBL)
- 当前专利权人地址: SE Höganäs
- 代理机构: Buchanan Ingersoll & Rooney P.C.
- 优先权: EP14184863 20140916
- 国际申请: PCT/EP2015/071115 WO 20150915
- 国际公布: WO2016/041977 WO 20160324
- 主分类号: C22C38/02
- IPC分类号: C22C38/02 ; C22C38/18 ; C22C33/02 ; B22F5/08 ; C22C38/04 ; C22C38/12 ; C22C38/22 ; B22F3/24
摘要:
The present invention provides a low cost pre-alloyed iron based powder which has high compressibility, capable of rendering a compacted and sintered component high green density, (GD), and high sintered density, (SD). Also, a method or process for producing components, especially gears, including compaction of powder mixture containing the pre-alloyed iron-based powder, sintering of the compacted component, Low Pressure carburizing, (LPC), High Pressure Gas Quenching, (HPGQ), and tempering, is provided. In one embodiment, the process includes high temperature sintering. Other aspects of the present invention include a powder mixture containing the pre-alloyed iron based powder and components produced by the new process from the powder mixture. Such carburized components exhibit a hard surface combined with a softer and tougher core, necessary properties for e.g. automotive gears subjected to harsh environment.
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