公开(公告)号：US20100139451A1

公开(公告)日：2010-06-10

申请号：US12630536

申请日：2009-12-03

申请人： Isamu SAITO ,  Yoshihiro Takitani ,  Shinichiro Kato ,  Makoto Hobo ,  Keiichiro Kamiya ,  Takahiro Miyazaki ,  Takashi Kano

发明人： Isamu SAITO ,  Yoshihiro Takitani ,  Shinichiro Kato ,  Makoto Hobo ,  Keiichiro Kamiya ,  Takahiro Miyazaki ,  Takashi Kano

IPC分类号： F16C3/06 ,  B21K1/08

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

摘要： The invention relates to a crankshaft member having high fatigue strength and good bending correctability, and its method of manufacture. The steel made crankshaft member mainly consists of a two-phase structure of ferrite and perlite. The steel includes C, Ni, Mn, and Cr as required elements and Si, Cu, Mo, Ti, V, Nb, Ca, and S as optional elements that may be included, in the amounts of C within the range of 0.20 to 0.50 wt %, Si within the range of 0 to 0.6 wt %, Mn within the range of 0.5 to 1.5 wt %, Cu within the range of 0 to 0.7 wt %, Ni within the range of 0.05 to 1.5 wt %, Cr within the range of 0.05 to 0.45 wt %, and Mo within the range of 0 to 0.5 wt % to satisfy the condition 115≧70 C+8 Si+23 Mn+11 Cu+128 Cr+83 Mo≧50. A portion of the member surface is provided at least with a hard nitride layer having an average hardness within the range of 300 to 450 HV. Lamellar spacing of the perlite is 0.3 μm or less.

摘要翻译： 本发明涉及具有高疲劳强度和良好的弯曲矫正性的曲轴件及其制造方法。 钢制曲轴构件主要由铁素体和珍珠岩的两相结构组成。 所述钢包含C，Ni，Mn和Cr作为要素，Si，Cu，Mo，Ti，V，Nb，Ca和S作为可以包含的任意元素，C的量在0.20〜 0.50重量％，Si在0〜0.6重量％的范围内，Mn在0.5〜1.5重量％的范围内，Cu在0〜0.7重量％的范围内，Ni在0.05〜1.5重量％的范围内，Cr在 0.05〜0.45重量％的范围，Mo在0〜0.5重量％的范围内，满足条件115≥70℃+ 8Si + 23 Mn + 11 Cu + 128 Cr + 83Mo≥50。 构件表面的一部分至少设置有平均硬度在300至450HV范围内的硬质氮化物层。 珍珠岩的层状间隔为0.3μm以下。

公开(公告)号：US08911566B2

公开(公告)日：2014-12-16

申请号：US12958855

申请日：2010-12-02

申请人： Isamu Saito ,  Yoshihiro Takitani ,  Shinichiro Kato ,  Makoto Hobo ,  Keiichiro Kamiya ,  Takahiro Miyazaki ,  Takashi Kano

发明人： Isamu Saito ,  Yoshihiro Takitani ,  Shinichiro Kato ,  Makoto Hobo ,  Keiichiro Kamiya ,  Takahiro Miyazaki ,  Takashi Kano

IPC分类号： F16C3/06 ,  B21K1/08

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

摘要： A nitrocarburized crankshaft member made of a steel that includes C in an amount by weight of 0.25 to 0.32% as a required element and an optional element that may be included, and Fe and inevitable impurities in a remaining portion. The steel-made crankshaft member mainly includes ferrite and perlite, wherein at least a portion of the steel surface thereof having a ferrite surface area of 50% or greater is imparted with a nitrocarburized hard layer. The nitrocarburized hard layer includes a surface compound layer suppressed to a thickness of 10 to 35 μm, and a nitrogen diffusion zone below the surface compound layer having a diffusion depth of 700 μm or greater. The steel includes C, Si, Mn, Cu, Ni, and Cr as the required elements and Mo, N, s-Al, and Ti as the optional elements.

摘要翻译： 由钢制成的氮碳共渗曲轴构件，其包含作为所需元素的重量为0.25〜0.32％的C和可以包含的任选元素，剩余部分中的Fe和不可避免的杂质。 钢制曲轴构件主要包括铁素体和珍珠岩，其中具有铁素体表面积为50％以上的钢表面的至少一部分被赋予了氮碳共渗硬化层。 氮碳共渗硬化层包括被抑制为10〜35μm厚度的表面化合物层和扩散深度为700μm以上的表面化合物层下方的氮扩散区。 钢包含C，Si，Mn，Cu，Ni和Cr作为所需元素，Mo，N，s-Al和Ti作为任选元素。

公开(公告)号：US08685177B2

公开(公告)日：2014-04-01

申请号：US12630536

申请日：2009-12-03

申请人： Isamu Saito ,  Yoshihiro Takitani ,  Shinichiro Kato ,  Makoto Hobo ,  Keiichiro Kamiya ,  Takahiro Miyazaki ,  Takashi Kano

发明人： Isamu Saito ,  Yoshihiro Takitani ,  Shinichiro Kato ,  Makoto Hobo ,  Keiichiro Kamiya ,  Takahiro Miyazaki ,  Takashi Kano

IPC分类号： C21D8/00 ,  C21D9/30 ,  C23C8/26

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

摘要： The invention relates to a crankshaft member having high fatigue strength and good bending correctability, and its method of manufacture. The steel made crankshaft member mainly consists of a two-phase structure of ferrite and perlite. The steel includes C, Ni, Mn, and Cr as required elements and Si, Cu, Mo, Ti, V, Nb, Ca, and S as optional elements that may be included, in the amounts of C within the range of 0.20 to 0.50 wt %, Si within the range of 0 to 0.6 wt %, Mn within the range of 0.5 to 1.5 wt %, Cu within the range of 0 to 0.7 wt %, Ni within the range of 0.05 to 1.5 wt %, Cr within the range of 0.05 to 0.45 wt %, and Mo within the range of 0 to 0.5 wt % to satisfy the condition 115≧70C+8Si+23Mn+11Cu+128Cr+83Mo≧50. A portion of the member surface is provided at least with a hard nitride layer having an average hardness within the range of 300 to 450 HV. Lamellar spacing of the perlite is 0.3 μm or less.

摘要翻译： 本发明涉及具有高疲劳强度和良好的弯曲矫正性的曲轴件及其制造方法。 钢制曲轴构件主要由铁素体和珍珠岩的两相结构组成。 所述钢包含C，Ni，Mn和Cr作为要素，Si，Cu，Mo，Ti，V，Nb，Ca和S作为可以包含的任意元素，C的量在0.20〜 0.50重量％，Si在0〜0.6重量％的范围内，Mn在0.5〜1.5重量％的范围内，Cu在0〜0.7重量％的范围内，Ni在0.05〜1.5重量％的范围内，Cr在 0.05〜0.45重量％的范围，Mo在0〜0.5重量％的范围内，满足条件115≥70℃+ 8Si + 23Mn + 11Cu + 128Cr +83Mo≥50。 构件表面的一部分至少设置有平均硬度在300至450HV范围内的硬质氮化物层。 珍珠岩的层状间隔为0.3μm以下。