发明公开
EP1561832A1 Method to make sinter-hardened powder metal parts with complex shapes
审中-公开
维尔法赫尔·赫斯特伦·冯·史密斯特
- 专利标题: Method to make sinter-hardened powder metal parts with complex shapes
- 专利标题(中): 维尔法赫尔·赫斯特伦·冯·史密斯特
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申请号: EP05001266.5申请日: 2005-01-21
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公开(公告)号: EP1561832A1公开(公告)日: 2005-08-10
- 发明人: Sun, Ryan , Xu, Kai
- 申请人: BorgWarner Inc.
- 申请人地址: 3850 Hamlin Road Auburn Hills, MI 48326-2872 US
- 专利权人: BorgWarner Inc.
- 当前专利权人: BorgWarner Inc.
- 当前专利权人地址: 3850 Hamlin Road Auburn Hills, MI 48326-2872 US
- 代理机构: Petruzziello, Aldo
- 优先权: US766154 20040128
- 主分类号: C22C33/02
- IPC分类号: C22C33/02 ; F16H55/06
摘要:
A method of producing parts from powdered metals is disclosed, comprising the following steps. A metallurgical powder is provided, consisting of iron, 0.3-1.0 weight percent carbon, 0-4 weight percent chromium, 0-3 weight percent copper, 0.5-1.5 weight percent molybdenum, 0.5-4.5 weight percent nickel, 0-1.0 weight percent manganese, and 0-1.5 weight percent silicon. Metal powders are made by atomization and mixing. The powder metal parts are made by compacting, pre-sintering, profile/form grinding, sinter furnace hardening, and secondary operations. Profile/form grinding generates profiles, which can not be formed by compaction tooling, such as undercut. The specific pre-sinter cycle makes parts strong enough for profile grinding with prolonged tool life. Powder metal parts made by this invention are also disclosed.
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