基本信息:
- 专利标题： GEAR AND METHOD FOR PRODUCING SAME
- 专利标题（中）：齿轮及其制造方法
- 申请号：EP11762874.3 申请日：2011-03-30
- 公开(公告)号：EP2505684B1 公开(公告)日：2018-05-16
- 发明人： OHBAYASHI Koji , TAGUCHI Keita , KATO Susumu , KOZAWA Shuji , KUBOTA Manabu , ADACHI Yuji , SATO Hirokazu
- 申请人： Aisin AW Co., Ltd. , Nippon Steel & Sumitomo Metal Corporation
- 申请人地址： 10 Takane Fujii-cho Anjo-shi Aichi 444-1192 JP
- 专利权人： Aisin AW Co., Ltd.,Nippon Steel & Sumitomo Metal Corporation
- 当前专利权人： AISIN AW CO., LTD., ANJO-SHI, JP
- 当前专利权人地址： AISIN AW CO., LTD., ANJO-SHI, JP
- 代理机构： TBK
- 优先权： JP2010079437 20100330
- 国际公布： WO2011122650 20111006
- 主分类号： C22C38/00
- IPC分类号： C22C38/00 ; C21D1/06 ; C21D9/32 ; C22C38/60 ; C23C8/22 ; F16H55/06 ; C21D9/28 ; C21D9/30 ; C23C8/20 ; C21D1/10 ; C21D1/18 ; C23C8/80 ; C22C38/02 ; C22C38/04 ; C22C38/06 ; C22C38/14 ; C22C38/18
摘要：
A gear is manufactured using raw material steel having the following chemical composition: C: 0.1% to 0.40% (% by mass), Si: 0.35% to 3.0%, Mn: 0.1% to 3.0%, Cr: less than 0.2%, Mo: 0.1% or less, P: 0.03% or less, S: 0.15% or less, Al: 0.05% or less, N: 0.03% or less, and Fe and unavoidable impurities: remainder, and by performing: a carburizing process of forming a carburized layer on a surface of the gear at a low oxygen concentration, a cooling process of cooling the gear after the carburizing process at a low cooling rate at which no martensite transformation takes place, to or below a temperature at which structural transformation is completed, and a quenching process of heating the gear by high-density energy heating after the cooling process so as to austenitize a region lying shallower than a core portion and tooth portions without austenitizing the core portion, and rapidly cooling the gear from that state. Consequently, surface layer portions of the tooth portions and a tooth root portion are made to be a carburized layer, the remaining portion of the tooth portions and a portion of a disk portion lying below the carburized layer be a quench-hardened layer, and a region of the disk portion lying deeper than the quench-hardened layer be an unquenched layer.
公开/授权文献:
- EP2505684A1 GEAR AND METHOD FOR PRODUCING SAME 公开/授权日：2012-10-03
IPC结构图谱:
| C | 化学；冶金 |
| --C22 | 冶金（铁的冶金入C21）；黑色或有色金属合金；合金或有色金属的处理 |
| ----C22C | 合金 |
| ------C22C38/00 | 铁基合金，例如合金钢 |