公开(公告)号：US20150083279A1

公开(公告)日：2015-03-26

申请号：US14554998

申请日：2014-11-26

申请人： HONDA MOTOR CO., LTD. ,  DAIDO STEEL CO., LTD.

发明人： Isamu SAITO ,  Yoshihiro TAKITANI ,  Shinichiro KATO ,  Makoto HOBO ,  Keiichiro KAMIYA ,  Takahiro MIYAZAKI ,  Takashi KANO

IPC分类号： F16C3/06 ,  C23C8/32

CPC分类号： F16C3/06 ,  B21K1/08 ,  C23C8/32 ,  Y10T29/49286 ,  Y10T74/2173

摘要： A nitrocarburized crankshaft member made of a steel having essentially ferrite and perlite, and at least a portion of a steel surface thereof having a ferrite surface area of 50% or greater that is imparted with a nitrocarburized hard layer. The steel consists of C, Si, Mn, Cu, Ni, and Cr as required elements and Mo, N, s-Al, Ti, Pb, Bi, and Ca as optional elements that may be included, and Fe and inevitable impurities. C is within a range of 0.25 to 0.32%. The nitrocarburized crankshaft member includes a thickness of a surface compound layer of the nitrocarburized hard layer of 10 to 35 μm that is formed during establishment of a diffusion depth of a nitrogen diffusion zone below the surface compound layer of 700 μm or greater.

摘要翻译： 一种由基本上为铁素体和珍珠岩的钢制成的氮碳共渗曲轴构件，其至少一部分钢铁表面的铁素体表面积为50％以上，赋予了氮碳共渗硬化层。 该钢由需要的元素C，Si，Mn，Cu，Ni和Cr组成，可以包括Mo，N，s-Al，Ti，Pb，Bi和Ca作为任选的元素，以及Fe和不可避免的杂质。 C在0.25〜0.32％的范围内。 氮碳共渗曲轴构件包括在建立700μm或更大的表面化合物层下方的氮扩散区的扩散深度期间形成的10至35μm的氮碳共渗硬化层的表面化合物层的厚度。