发明授权
- 专利标题: Manufacturing method for electric furnace steel for carburizing without Mo addition
- 专利标题(中): 无钼添加用于渗碳的电炉钢的制造方法
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申请号: US14334801申请日: 2014-07-18
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公开(公告)号: US09580778B2公开(公告)日: 2017-02-28
- 发明人: Yuji Adachi , Naoki Fukuda
- 申请人: AICHI STEEL CORPORATION
- 申请人地址: JP Tokai-shi
- 专利权人: AICHI STEEL CORPORATION
- 当前专利权人: AICHI STEEL CORPORATION
- 当前专利权人地址: JP Tokai-shi
- 代理机构: Oblon, McClelland, Maier & Neustadt, L.L.P.
- 优先权: JP2013-150388 20130719; JP2014-111410 20140529
- 主分类号: C22C38/44
- IPC分类号: C22C38/44 ; C22C38/42 ; C22C38/06 ; C22C38/04 ; C22C33/04 ; C22C38/00 ; C22C38/54 ; C22C38/02 ; C22C38/20 ; C22C38/22 ; C22C38/32 ; C23C8/22 ; C21C5/52
摘要:
An electric furnace steel contains, by mass %, C: 0.12 to 0.28%, Si: equal to or less than 0.15%, Mn: 0.65 to 0.95%, P: equal to or less than 0.035%, S: equal to or less than 0.035%, Cr: 1.35 to 1.90%, Al: 0.020 to 0.050%, and N: 0.0080 to 0.0230%. A scrap material is selected such that Cu, Ni, and Mo that derive from the scrap material and are thus contained as impurities in the electric furnace steel satisfy Expression 1. The electric furnace steel further contains Fe and unavoidable impurities as a remainder thereof. Accordingly, the electric furnace steel can secure carburizing quality equivalent to or higher than that of Cr—Mo steel, and can have properties equivalent to or higher than that of Cr—Mo steel, without adding Mo. ([Cu]+2×[Ni])0.76×[Mo]≧0.0040 Expression 1:
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