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1. 发明授权

US5405154A Piston ring 失效
标题翻译：活塞环
公开(公告)号：US5405154A
公开(公告)日：1995-04-11
申请号：US893847
申请日：1992-06-04
申请人： Takeshi Tsuchiya , Shuji Sameshima , Yoshio Onodera , Satoshi Kawashima
发明人： Takeshi Tsuchiya , Shuji Sameshima , Yoshio Onodera , Satoshi Kawashima
IPC分类号： C23C8/26 , B23P15/06 , F16J9/26 , F16J9/00
CPC分类号： B23P15/06 , F16J9/26 , Y10T29/49281 , Y10T29/49282
摘要： A compression ring as a piston ring adapted to by received in an annular groove formed in a piston disposed in a cylinder assembly of an internal combustion engine includes an annular ring base member having a cutout portion, the ring base member having an outer sliding surface, upper and lower surfaces continuous to the sliding surface through corner portions and an inner peripheral surface to be fitted to the piston groove, the sliding surface contacting an inner wall of the cylinder when the piston reciprocates therein. A nitriding layer is formed on all the surfaces of the ring base member by a nitriding treatment. A white portion of the nitriding layer formed only on the sliding surface of the ring base member is substantially completely removed and white portions of the nitriding layer formed on the first and second surfaces and corner portions between the sliding surface and the upper and lower surfaces are removed so as to reduce thicknesses thereof to not more than 5 .mu.m.
摘要翻译：作为活塞环的压缩环，适于通过容纳在形成在内燃机的气缸组件中的活塞中的环形槽中，包括具有切口部的环形基座构件，所述环形基座构件具有外部滑动面，通过角部与滑动面连续的上表面和下表面以及与活塞槽配合的内周面，当活塞在其中往复运动时，滑动面与气缸的内壁接触。通过氮化处理在环状基材的全部表面上形成氮化层。基本上完全除去仅在环状基材的滑动面上形成的氮化层的白色部分，形成在滑动面与上下面之间的第一和第二表面和角部的氮化层的白色部分是去除以便将其厚度减小到不超过5μm。

2. 发明授权

US06213474B1 Piston ring and combination of compression rings 失效
公开(公告)号：US06213474B1
公开(公告)日：2001-04-10
申请号：US09271276
申请日：1999-03-17
申请人： Shuji Sameshima , Koji Takeuchi
发明人： Shuji Sameshima , Koji Takeuchi
IPC分类号： C22C3818
CPC分类号： F16J9/26 , C23C8/00 , C23C8/80
摘要： According to an aspect of the present invention, a piston ring for use in internal combustion engines is provided that is made of matensite-based stainless steel material containing C of not less than 0.4 and not more than 0.8 weight percent, Si of not less than 0.16 and not more than 0.4 weight percent, Mn of not less than 0.1 and not more than 0.4 weight percent, and Cr of not less than 2.0 and not more than 11.0 weight percent, where the steel material of the piston ring has mainly chromium carbide precipitated in the base texture thereof. The steel material of the first compression ring then has a nitriding layer formed thereon. According to another aspect of the present invention, a combination of compression rings, including a first compression ring 1 and a second compression ring 2, for use in internal combustion engines, is provided. The first compression ring 1 is made of martensite-based stainless steel material containing C of not less than 0.16 and not more than 1.4 weight percent, and Cr of not less than 12 and not more than 23.0 weight percent, where the steel material of the first compression ring 1 has mainly chromium carbide precipitated in the base texture thereof. The steel material of the first compression ring 1 then has a nitriding layer 11 of hardness of not less than Hv1050 formed thereon. The second compression ring 2 is made of the same steel material as the piston ring first described above, with mainly chromium carbide likewise precipitated in the base texture thereof The steel material of the second compression ring 2 then has a nitriding layer 22 of hardness of less than Hv1050 formed thereon. With the arrangement above, according to the present invention, piston rings have an advantage of excellent bending workability during the ring forming process. Likewise, a combination of first and second compression rings 1 and 2, has an advantage of reducing the total manufacturing cost of the combination of the compression rings, and an excellent abrasion resistance, with a second compression ring exhibiting excellent cold workability during the ring forming process.

3. 发明授权

US5292381A Piston ring and process for manufacturing the same 失效
标题翻译：活塞环和制造过程相同
公开(公告)号：US5292381A
公开(公告)日：1994-03-08
申请号：US913349
申请日：1992-07-15
申请人： Takeshi Tsuchiya , Shuji Sameshima , Yoshio Onodera , Satoshi Kawashima
发明人： Takeshi Tsuchiya , Shuji Sameshima , Yoshio Onodera , Satoshi Kawashima
IPC分类号： B23P15/06 , F16J9/26 , C21D1/06
CPC分类号： B23P15/06 , F16J9/26
摘要： The object of the present invention is to provide a piston ring which is free from occurrence of cracks on the nitrided layer and having enhanced abrasion resistance and fatigue strength, and to provide a process for manufacturing the piston ring. In the invention, a surface of the steel body is subjected to a two-stage nitriding treatment consisting of low-temperature nitriding and high-temperature nitriding. A white layer on the slidable surface along the inner periphery surface of a cylinder is removed, and a white layer on each of the upper and lower surfaces and the corner portions each being adjacent to the slidable surface is removed to have a thickness of not more than 5 .mu.m.
摘要翻译：本发明的目的是提供一种在氮化层上不产生裂纹并具有增强的耐磨性和疲劳强度的活塞环，并提供一种用于制造活塞环的方法。在本发明中，钢体的表面经受由低温氮化和高温氮化组成的两级氮化处理。除去沿着圆筒的内周面的滑动面上的白色层，除去与上述滑动面相邻的上下表面和角部的白色层，使其厚度不大超过5（我的）m。

4. 发明授权

US5433001A Method of producing piston ring 失效
标题翻译：生产活塞环的方法
公开(公告)号：US5433001A
公开(公告)日：1995-07-18
申请号：US978233
申请日：1992-11-20
申请人： Takeshi Tsuchiya , Shuji Sameshima , Yoshio Onodera , Satoshi Kawashima
发明人： Takeshi Tsuchiya , Shuji Sameshima , Yoshio Onodera , Satoshi Kawashima
IPC分类号： C23C8/26 , C23C8/80 , F02F5/00 , F16J9/26 , B23P15/00
CPC分类号： C23C8/80 , C23C8/26 , Y10T29/49274 , Y10T29/49281 , Y10T29/49995
摘要： A method of producing a piston ring to be incorporated in an internal combustion engine includes first nitriding surfaces of a steel base material in a high temperature range and then continuously nitriding in a low temperature range. Finally a porous layer of at least a sliding surface is removed to expose a diffusion layer under the porous layer.
摘要翻译：在内燃机中结合的活塞环的制造方法包括在高温范围内的钢基材的第一氮化表面，然后在低温范围内连续氮化。最后，去除至少一个滑动表面的多孔层，以暴露多孔层下方的扩散层。

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