公开(公告)号：US20140060709A1

公开(公告)日：2014-03-06

申请号：US14077086

申请日：2013-11-11

申请人： JFE BARS & SHAPES CORPORATION ,  NHK SPRING CO., LTD.

发明人： Akira TANGE ,  Kiyoshi KURIMOTO ,  Yurika GOTO ,  Katsuhiko KIKUCHI ,  Kunikazu TOMITA ,  Kazuaki FUKUOKA ,  Kazuaki HATTORI

IPC分类号： B60G99/00

CPC分类号： B60G21/055 ,  B60G99/00 ,  B60G2206/427 ,  B60G2206/724 ,  B60G2206/8103 ,  B60G2206/81035 ,  B60G2206/8401 ,  B60G2206/8402 ,  C21D1/18 ,  C21D1/40 ,  C21D1/42 ,  C21D6/005 ,  C21D7/06 ,  C21D8/065 ,  C21D9/0075 ,  C21D9/02 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/42 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58 ,  C22C38/60 ,  Y02P10/253

摘要： Steel, excellent in corrosion resistance and low-temperature toughness, for a vehicle suspension spring part, includes 0.15 to 0.35% by mass of C, more than 0.6% by mass but 1.5% by mass or less of Si, 1 to 3% by mass of Mn, 0.3 to 0.8% by mass of Cr, 0.005 to 0.080% by mass of sol. Al, 0.005 to 0.060% by mass of Ti, 0.005 to 0.060% by mass of Nb, not more than 150 ppm of N, not more than 0.035% by mass of P, not more than 0.035% by mass of S, 0.01 to 1.00% by mass of Cu, and 0.01 to 1.00% by mass of Ni, the balance consisting of Fe and unavoidable impurities, with Ti+Nb≦0.07% by mass. The steel has a tensile strength of not less than 1,300 MPa.

摘要翻译： 对于车辆悬架弹簧部件，耐腐蚀性和低温韧性优异的钢包含0.15〜0.35质量％的C，0.6质量％以上且1.5质量％以下的Si，1〜3质量％ Mn质量，Cr：0.3〜0.8质量％，溶胶0.005〜0.080质量％。 Al，0.005〜0.060质量％的Ti，0.005〜0.060质量％的Nb，不大于150ppm的N，不大于0.035质量％的P，不大于0.035质量％的S，0.01至 1.00质量％的Cu和0.01〜1.00质量％的Ni，余量由Fe和不可避免的杂质构成，Ti +Nb≤0.07质量％。 钢的拉伸强度不低于1300MPa。

公开(公告)号：US20170021691A1

公开(公告)日：2017-01-26

申请号：US15276083

申请日：2016-09-26

申请人： NHK SPRING CO., LTD. ,  JFE BARS & SHAPES CORPORATION

发明人： Akira TANGE ,  Kiyoshi KURIMOTO ,  Yurika GOTO ,  Katsuhiko KIKUCHI ,  Kunikazu TOMITA ,  Kazuaki FUKUOKA ,  Kazuaki HATTORI

IPC分类号： B60G21/055 ,  C21D8/06 ,  C21D1/18 ,  C21D1/40 ,  C21D1/42 ,  C22C38/00 ,  C22C38/50 ,  C22C38/48 ,  C22C38/42 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C21D9/00 ,  C22C38/58

CPC分类号： B60G21/055 ,  B60G99/00 ,  B60G2206/427 ,  B60G2206/724 ,  B60G2206/8103 ,  B60G2206/81035 ,  B60G2206/8401 ,  B60G2206/8402 ,  C21D1/18 ,  C21D1/40 ,  C21D1/42 ,  C21D6/005 ,  C21D7/06 ,  C21D8/065 ,  C21D9/0075 ,  C21D9/02 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/42 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58 ,  C22C38/60 ,  Y02P10/253

摘要： A steel, having a high corrosion resistance and low-temperature toughness, for a vehicle suspension spring part, the steel includes 0.21 to 0.35% by mass of C, more than 0.6% by mass but 1.5% by mass or less of Si, 1 to 3% by mass of Mn, 0.3 to 0.8% by mass of Cr, 0.005 to 0.080% by mass of sol. Al, 0.005 to 0.060% by mass of Ti, 0.005 to 0.060% by mass of Nb, not more than 150 ppm of N, not more than 0.035% by mass of P, not more than 0.035% by mass of S, 0.01 to 1.00% by mass of Cu, and 0.01 to 1.00% by mass of Ni, the balance being Fe and unavoidable impurities, with Ti+Nb≦0.07% by mass, wherein crystal grains of the steel after hardening have a prior austenite grain size number of 7.5 to 10.5, and the steel having a tensile strength of not less than 1,300 MPa.

摘要翻译： 作为用于车辆悬架弹簧部件的具有高耐腐蚀性和低温韧性的钢，该钢包含C：0.21〜0.35质量％，0.6质量％以下，Si：1〜1.5质量％ 至3质量％的Mn，0.3〜0.8质量％的Cr，0.005〜0.080质量％的溶胶。 Al，0.005〜0.060质量％的Ti，0.005〜0.060质量％的Nb，不大于150ppm的N，不大于0.035质量％的P，不大于0.035质量％的S，0.01至 1.00质量％的Cu，0.01〜1.00质量％的Ni，余量为Fe和不可避免的杂质，Ti +Nb≤0.07质量％，其中，硬化后的钢的结晶粒子具有原奥氏体晶粒数 为7.5〜10.5，钢的拉伸强度为1300MPa以上。