公开(公告)号：US20160108490A1

公开(公告)日：2016-04-21

申请号：US14894239

申请日：2014-04-21

申请人： DAIDO STEEL CO., LTD. ,  AISIN AW CO., LTD.

发明人： Yutaka ETO ,  Koki MIZUNO ,  Yasushi MATSUMURA ,  Kohei YAMAGUCHI

IPC分类号： C21D9/32 ,  C23C8/80 ,  C21D6/00 ,  C22C38/54 ,  C22C38/00 ,  C22C38/44 ,  C22C38/42 ,  C22C38/04 ,  C22C38/02 ,  C23C8/22 ,  C22C38/50

CPC分类号： C21D9/32 ,  C21D1/06 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D2221/00 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58 ,  C23C8/22 ,  C23C8/80 ,  F16H55/06

摘要： A gear that is formed of material steel molded to include a disc portion and a plurality of tooth portions circumferentially discretely formed on the disc portion and have a shape in which tooth root portions are formed between the tooth portions, and is subjected to vacuum carburizing treatment and subsequent quenching treatment with high-density energy heating after being molded.

摘要翻译： 由材料钢形成的齿轮，其形成为包括圆盘部分和圆周上离散地形成在圆盘部分上的多个齿部分，并且具有在齿部之间形成齿根部的形状，并且进行真空渗碳处理 随后在模塑后用高密度能量加热进行淬火处理。

公开(公告)号：US20160122858A1

公开(公告)日：2016-05-05

申请号：US14895098

申请日：2014-06-03

申请人： DAIDO STEEL CO., LTD.

发明人： Tomohiro ANDOH ,  Naoki UMEMORI ,  Toshiyuki MORITA ,  Yasushi MATSUMURA

IPC分类号： C23C8/34 ,  C22C38/26 ,  C22C38/22 ,  C21D1/773 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D6/00 ,  C22C38/28 ,  C22C38/06

CPC分类号： C23C8/34 ,  C21D1/06 ,  C21D1/773 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C22C38/00 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C23C8/22

摘要： The present invention provides a carburized part which is formed by processing a steel into a shape of a part and performing a carburizing treatment on the steel, the steel having a composition consisting essentially of, in terms of % by mass: 0.10% to 0.40% of C; 0.05% to 2.00% of Si; 0.30% to 2.00% of Mn; 0.30% to 3.00% of Cr; 0.025% or less of N; and as a pinning particle forming element which forms a pinning particle by nitrification, one or two or more elements selected from: 0.020% to 0.100% of Al; 0.01% to 0.20% of Nb; and 0.005% to 0.20% of Ti, and optionally: 0.80% or less of Mo, with the remainder being Fe and inevitable impurities, in which a crystal grain size number of a surface layer of the part at a depth of 50 μm or less from a surface is greater than 5, and the crystal grain size number of an inner portion of the part at a depth of 3 mm or more from the surface is 5 or less.

摘要翻译： 本发明提供一种渗碳部件，其通过将钢加工成部分的形状并对钢进行渗碳处理而形成，所述钢的组成基本上由质量％计为0.10％至0.40％ 的C; 0.05％〜2.00％的Si; 0.30％〜2.00％的Mn; 0.30％〜3.00％的Cr; 0.025％以下的N; 并且作为通过硝化形成钉扎颗粒的钉扎颗粒形成元件，选自以下的一种或两种以上的元素：Al：0.020〜0.100％ 0.01％〜0.20％的Nb; ，Ti：0.005〜0.20％，Mo：0.80％以下，余量为Fe和不可避免的杂质，其中，深度为50μm以下的部分的表面层的晶粒度数 从表面大于5°，表面的深度为3mm以上的部分的内部的晶粒尺寸数为5以下。