公开(公告)号：US20110284133A1

公开(公告)日：2011-11-24

申请号：US13116405

申请日：2011-05-26

Applicant: Naoyuki Sano ,  Masayuki Horimoto ,  Yoshinari Okada ,  Masaki Amano ,  Akihito Ninomiya

Inventor： Naoyuki Sano ,  Masayuki Horimoto ,  Yoshinari Okada ,  Masaki Amano ,  Akihito Ninomiya

IPC: C23C8/32 ,  B32B15/04

CPC classification number: C23C8/32 ,  C21D1/06 ,  C21D1/18 ,  C21D9/32 ,  C21D2211/004 ,  C21D2221/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18 ,  C22C38/22 ,  C23C8/02 ,  C23C8/22 ,  C23C8/80

Abstract: A carbonitrided part, where a base steel contains, in mass percent, C: 0.10 to 0.35%, Si: 0.15 to 1.0%, Mn: 0.30 to 1.0%, Cr: 0.40 to 2.0%, S≦0.05%, and according to need further Mo≦0.50%, with the balance being Fe and impurities, and in the region to a position of effective hardening depth from the surface of a hardened layer of the carbonitrided part, iron nitride particles of ε-Fe3N and/or ζ-Fe2N are dispersed, and retained austenite is decomposed into bainitic ferrite, Fe3C, and α″-Fe16N2 has excellent abrasion strength and high pitting strength, although the base steel is a low-cost one with less content of Mo of an expensive alloy element or without addition of Mo. This carbonitrided part can be produced, for example, by subjecting the base steel part to carburizing in which the base steel part is held in a carburizing atmosphere at 900 to 950° C. and successively to carbonitriding in which the base steel part is held in a carbonitriding atmosphere with a nitrogen potential of 0.2 to 0.6% at 800 to 900° C., subsequently quenching the base steel part, and thereafter tempering the base steel part by heating to a temperature in the range of more than 250° C. to not more than 350° C.

Abstract translation: 碳素氮化部，以质量％计含有C：0.10〜0.35％，Si：0.15〜1.0％，Mn：0.30〜1.0％，Cr：0.40〜2.0％，S＆lt; lE; 0.05％ 需要进一步的Mo＆NE; 0.50％，余量为Fe和杂质，并且在该区域中，从碳氮共渗部分的硬化层的表面到有效硬化深度的位置，Fe 3 N和/或ζ的氮化铁颗粒 -Fe2N分散，残留奥氏体分解为贝氏体铁素体，Fe3C，α“-Fe16N2具有优异的耐磨强度和较高的点蚀强度，虽然基础钢是价格昂贵的合金元素的Mo含量低的低成本 或不添加Mo。该碳氮共渗部分可以例如通过将基体钢部分进行渗碳处理来生产，其中将基体钢部分保持在渗碳气氛中在900〜950℃，然后依次进行碳氮共渗，其中 基础钢部分保持在含氮化的碳氮共渗气氛中 n电位在800〜900℃下为0.2〜0.6％，接着对基体钢部分进行淬火，然后通过加热至250℃以上350℃以下的温度回火钢基部分 C。

公开(公告)号：US09771643B2

公开(公告)日：2017-09-26

申请号：US14245229

申请日：2014-04-04

Applicant: Akihito Ninomiya ,  Yoshinari Okada ,  Takahiro Miyazaki ,  Yasushi Matsumura ,  Shinichiro Kato ,  Tetsuya Shimomura

Inventor： Akihito Ninomiya ,  Yoshinari Okada ,  Takahiro Miyazaki ,  Yasushi Matsumura ,  Shinichiro Kato ,  Tetsuya Shimomura ,  Katsuya Yamaguchi

IPC: C23C8/22 ,  C23C8/02 ,  C23C8/80

CPC classification number: C23C8/22 ,  C23C8/02 ,  C23C8/80

Abstract: The invention provides a carburized part which has excellent medium-cycle fatigue strength in particular subjected to surface-hardening treatment by carburization. The invention provides a carburized part including a carburized layer formed by performing carburizing treatment to a steel, the steel including, in terms of % by mass: 0.15% to 0.25% of C, 0.15% or less of Si, 0.4% to 1.1% of Mn, 0.8% to 1.4% of Cr, 0.25% to 0.55% of Mo, 0.015% or less of P, and 0.035% or less of S, with the remainder being Fe and unavoidable impurities, and the steel satisfying the following relation; 0.10≦[Mo]/(10[Si]+[Mn]+[Cr])≦0.40, in which [M] represents a content of element M in terms of % by mass.

公开(公告)号：US20140299234A1

公开(公告)日：2014-10-09

申请号：US14245229

申请日：2014-04-04

Applicant: Shinichiro KATO ,  Takahiro MIYAZAKI ,  Yoshinari OKADA ,  Akihito NINOMIYA ,  Tetsuya SHIMOMURA ,  Yasushi MATSUMURA

Inventor： Akihito NINOMIYA ,  Yoshinari OKADA ,  Takahiro MIYAZAKI ,  Yasushi MATSUMURA ,  Shinichiro KATO ,  Tetsuya SHIMOMURA ,  Katsuya YAMAGUCHI

IPC: C23C8/22 ,  C23C8/02

CPC classification number: C23C8/22 ,  C23C8/02 ,  C23C8/80

Abstract: The invention provides a carburized part which has excellent medium-cycle fatigue strength in particular subjected to surface-hardening treatment by carburization. The invention provides a carburized part including a carburized layer formed by performing carburizing treatment to a steel, the steel including, in terms of % by mass: 0.15% to 0.25% of C, 0.15% or less of Si, 0.4% to 1.1% of Mn, 0.8% to 1.4% of Cr, 0.25% to 0.55% of Mo, 0.015% or less of P, and 0.035% or less of S, with the remainder being Fe and unavoidable impurities, and the steel satisfying the following relation; 0.10≦[Mo]/(10[Si]+[Mn]+[Cr])≦0.40, in which [M] represents a content of element M in terms of % by mass.

Abstract translation: 本发明提供一种具有优异的中等循环疲劳强度的渗碳部件，特别是通过渗碳进行表面硬化处理。 本发明提供一种渗碳部分，其包括通过对钢进行渗碳处理而形成的渗碳层，所述钢以质量％计含有：0.15〜0.25％的C，0.15％以下的Si，0.4〜1.1％ 的Mn，0.8〜1.4％的Cr，0.25〜0.55％的Mo，0.015％以下的P和0.035％以下的S，余量为Fe和不可避免的杂质，满足以下关系的钢 ; 0.10＆nlE; [Mo] /（10 [Si] + [Mn] + [Cr]）＆nlE; 0.40，其中[M]表示元素M的含量，以质量％计。

公开(公告)号：US20120211122A1

公开(公告)日：2012-08-23

申请号：US13415198

申请日：2012-03-08

Applicant: Naoyuki SANO ,  Masayuki HORIMOTO ,  Yoshinari OKADA ,  Masaki AMANO ,  Akihito NINOMIYA

Inventor： Naoyuki SANO ,  Masayuki HORIMOTO ,  Yoshinari OKADA ,  Masaki AMANO ,  Akihito NINOMIYA

IPC: C23C8/32 ,  C23C8/80

CPC classification number: C23C8/02 ,  C21D1/25 ,  C21D1/74 ,  C21D7/06 ,  C21D9/32 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18 ,  C23C8/22 ,  C23C8/32 ,  C23C8/80

Abstract: A method for producing a carbonitrided member comprising the steps of carburizing a steel part having a composition of, by mass percent, C: 0.10 to 0.35%, Si: 0.15 to 1.0%, Mn: 0.30 to 1.0%, Cr: 0.40 to 2.0%, S: 0.05% or less with the balance being Fe and impurities in a carburizing atmosphere of 900 to 950° C. The carburized steel part is carbonitrided in a carbonitriding atmosphere with the temperature of 800 to 900° C. and the nitrogen potential of 0.2 to 0.6%. The carbonitrided steel part is qhenched and then shot peened. The shot peening treatment may be further performed while heating to a temperature not higher than 350° C. or immediately after heating to a temperature not higher than 350° C. After quenching, the shot peening treatment may be further performed after tempering in the temperature range exceeding 250° C. and not higher than 350° C.

Abstract translation: 碳氮共渗构件的制造方法，其特征在于，将以质量％计含有C：0.10〜0.35％，Si：0.15〜1.0％，Mn：0.30〜1.0％，Cr：0.40〜2.0 ％，S：0.05％以下，余量为渗碳气氛中的Fe和杂质为900〜950℃。渗碳钢部分在碳氮共渗气氛中碳氮共混，温度为800〜900℃，氮势 为0.2〜0.6％。 将碳氮共渗钢部分进行复层，然后喷丸硬化。 可以在加热至不高于350℃的温度或加热至不高于350℃的温度之后进一步进行喷丸硬化处理。淬火后，可以在温度回火之后进一步进行喷丸硬化处理 范围超过250℃，不高于350℃

公开(公告)号：US09062364B2

公开(公告)日：2015-06-23

申请号：US13415198

申请日：2012-03-08

Applicant: Naoyuki Sano ,  Masayuki Horimoto ,  Yoshinari Okada ,  Masaki Amano ,  Akihito Ninomiya

Inventor： Naoyuki Sano ,  Masayuki Horimoto ,  Yoshinari Okada ,  Masaki Amano ,  Akihito Ninomiya

IPC: C23C8/32 ,  C23C8/02 ,  C21D1/25 ,  C21D1/74 ,  C21D7/06 ,  C21D9/32 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18 ,  C23C8/22 ,  C23C8/80

CPC classification number: C23C8/02 ,  C21D1/25 ,  C21D1/74 ,  C21D7/06 ,  C21D9/32 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18 ,  C23C8/22 ,  C23C8/32 ,  C23C8/80

Abstract: A method for producing a carbonitrided member comprising the steps of carburizing a steel part having a composition of, by mass percent, C: 0.10 to 0.35%, Si: 0.15 to 1.0%, Mn: 0.30 to 1.0%, Cr: 0.40 to 2.0%, S: 0.05% or less with the balance being Fe and impurities in a carburizing atmosphere of 900 to 950° C. The carburized steel part is carbonitrided in a carbonitriding atmosphere with the temperature of 800 to 900° C. and the nitrogen potential of 0.2 to 0.6%. The carbonitrided steel part is qhenched and then shot peened. The shot peening treatment may be further performed while heating to a temperature not higher than 350° C. or immediately after heating to a temperature not higher than 350° C. After quenching, the shot peening treatment may be further performed after tempering in the temperature range exceeding 250° C. and not higher than 350° C.

Abstract translation: 碳氮共渗构件的制造方法，其特征在于，将以质量％计含有C：0.10〜0.35％，Si：0.15〜1.0％，Mn：0.30〜1.0％，Cr：0.40〜2.0 ％，S：0.05％以下，余量为渗碳气氛中的Fe和杂质为900〜950℃。渗碳钢部分在碳氮共渗气氛中碳氮共混，温度为800〜900℃，氮势 为0.2〜0.6％。 将碳氮共渗钢部分进行复层，然后喷丸硬化。 可以在加热至不高于350℃的温度或加热至不高于350℃的温度之后进一步进行喷丸硬化处理。淬火后，可以在温度回火之后进一步进行喷丸硬化处理 范围超过250℃，不高于350℃