基本信息:
- 专利标题： 高强度弹簧钢、高强度弹簧的制造方法及高强度弹簧
- 专利标题（英）：High-strength spring steel, method for producing high-strength spring, and high-strength spring
- 申请号：CN201180054020.1 申请日：2011-10-21
- 公开(公告)号：CN103201404A 公开(公告)日：2013-07-10
- 发明人： 冈田秀树 , 丹下彰 , 丹后公一 , 住吉功
- 申请人： 日本发条株式会社
- 申请人地址： 日本神奈川县
- 专利权人： 日本发条株式会社
- 当前专利权人： 日本发条株式会社
- 当前专利权人地址： 日本神奈川县
- 代理机构： 上海专利商标事务所有限公司
- 代理人： 金明花
- 优先权： 2010-252856 2010.11.11 JP
- 国际申请： PCT/JP2011/074290 2011.10.21
- 国际公布： WO2012/063620 JA 2012.05.18
- 进入国家日期： 2013-05-09
- 主分类号： C22C38/50
- IPC分类号： C22C38/50 ; C21D7/06 ; C21D9/02 ; F16F1/06
This high-strength spring steel is characterized by: containing, by mass%, 0.38-0.44% of C, 2.00-2.30% of Si, 0.79-1.25% of Mn, 0.10-0.43% of Cr, 0.15-0.35% of Ni, 0.15-0.35% of Cu, 0.05-0.13% of Ti, no greater than 0.02% of P, no greater than 0.02% of S, 0.003-0.10% of Al, 0.002-0.012% of N, no greater than 0.0002% of O, the remainder comprising iron and unavoidable impurities; the AC3 transformation point, which is an index for decarbonizing performance determined from the belowmentioned formula (1), being in the range of 859-885 DEG C inclusive; the maximum quenching diameter (DI), which is an index for quenching performance determined from the belowmentioned formula (2), being in the range of 70-238 mm inclusive; and the tempered hardness (HRC), which is an index for spring performance determined from the belowmentioned formula (3), being in the range of 50-55 inclusive. Ac3=910-203vC -15.2Ni+44.7Si+104V+31.5Mo+13.1W ...(1); DI=DOfSifMnfPfSfCufNifCr ...(2); and HRC=38.99 + 17.48 C + 2.55 Si - 2.28 Ni + 2.37 Cr + 8.04 Ti ...(3); where D0=8.65vC, fSi=1 + 0.64 %Si, fMn=1 + 4.10 %Mn, fP=1 + 2.83 %P, fS=1 - 0.62 %S, fCu=1 + 0.27 %Cu, fNi=1 + 0.52 %Ni, and fCr=1 + 2.33 %Cr.
公开/授权文献:
- CN103201404B 高强度弹簧钢、高强度弹簧的制造方法及高强度弹簧 公开/授权日：2016-05-25