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1. 发明授权

US06485027B1 Surface heat treatment of piston rings 有权
标题翻译：活塞环表面热处理
公开(公告)号：US06485027B1
公开(公告)日：2002-11-26
申请号：US09240106
申请日：1999-01-29
申请人： Olivier Carrie , Jean-Marc Staerck , Christophe Maerky , Olivier Laine
发明人： Olivier Carrie , Jean-Marc Staerck , Christophe Maerky , Olivier Laine
IPC分类号： C21D940
CPC分类号： C21D9/40 , C21D1/09 , C21D1/10 , Y02P10/253 , Y10T29/49297
摘要： A piston ring for use in a piston of an internal combustion engine comprises a base material of a first hardness formed into a ring, and a secondary material of a second hardness formed by selective and superficial heat treatment of an outer portion of the base material. At least one outer surface of the ring is selectively and superficially heat treated in one of a variety of ways to form an austenitic metal layer about 100 &mgr;m thick on the surface of the ring. The ring is then rapidly cooled in an appropriate environment, resulting in the transformation of the austenitic compound into a martensitic compound adjacent the base material at the point of heat treatment. Preferably, the martensitic metal has a hardness range of 800 to 1000 HV (Vickers Hardness scale) measured at a load of 100 grams.
摘要翻译：用于内燃机的活塞的活塞环包括形成环的第一硬度的基材和通过基材的外部的选择性和表面热处理形成的第二硬度的二次材料。环的至少一个外表面以各种方式之一进行选择性和表面热处理，以在环的表面上形成约100μm厚的奥氏体金属层。然后在合适的环境中快速冷却环，导致奥氏体化合物在热处理点附近与基材相邻的马氏体化合物转化。优选地，马氏体金属在100克的负荷下测量的硬度范围为800至1000HV（维氏硬度计）。

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