基本信息:
- 专利标题： METHOD FOR TREATING A CAST IRON WORKPIECE AND WORKPIECE FORMED THEREBY
- 专利标题（中）：用于处理铸铁工件和形成的工件的方法
- 申请号：PCT/CN2012/085510 申请日：2012-11-29
- 公开(公告)号：WO2014082238A1 公开(公告)日：2014-06-05
- 发明人： XIONG, Xiaochuan , WANG, Jianfeng
- 申请人： GM GLOBAL TECHNOLOGY OPERATIONS LLC , XIONG, Xiaochuan , WANG, Jianfeng
- 申请人地址： P.O. Box 300 Mail Code 482-C23-B21 Detroit, Michigan US
- 专利权人： GM GLOBAL TECHNOLOGY OPERATIONS LLC,XIONG, Xiaochuan,WANG, Jianfeng
- 当前专利权人： GM GLOBAL TECHNOLOGY OPERATIONS LLC,XIONG, Xiaochuan,WANG, Jianfeng
- 当前专利权人地址： P.O. Box 300 Mail Code 482-C23-B21 Detroit, Michigan US
- 代理机构： CHINA PATENT AGENT (HK)LTD.
- 主分类号： C23C8/00
- IPC分类号： C23C8/00 ; C21D7/04 ; C23F17/00
摘要：
A method for treating a cast iron workpiece to increase a useful life thereof includes machining the workpiece to provide a finish surface thereon and deforming the finish surface of the workpiece by rubbing the finish surface against a blunt tool (80,80'), thereby forming a nanocrystallized surface layer (70). The workpiece is nitrocarburized, the nanocrystallized surface layer accelerating diffusion of nitrogen atoms and carbon atoms therethrough. The nitrocarburizing taking place: i) if the workpiece is stress relived prior to machining, for about 1 hour to about 2 hours at a temperature ranging from about 550°C to about 570°C, or ii) if the workpiece is not stress relieved prior to machining, for about 5 hours to about 10 hours at a temperature ranging from about 370°C to about 450°C. The nitrocarburizing renders the nanocrystallized surface layer into i) a friction surface, or ii) a corrosion-resistant surface.
摘要（中）：
一种用于处理铸铁工件以增加其使用寿命的方法包括加工工件以在其上提供精加工表面，并通过将精加工表面摩擦钝刀（80,80'）而使工件的精加工表面变形，由此形成 纳米结晶表面层（70）。 工件被氮碳共渗，纳米结晶表面层加速了氮原子和碳原子的扩散。 发生氮碳共渗：i）如果工件在机械加工之前应力恢复约在约550℃至约570℃的温度下约1小时至约2小时，或ii）如果工件没有减轻应力 在加工之前，在约370℃至约450℃的温度下进行约5小时至约10小时。 氮碳共渗使纳米结晶表面层成为i）摩擦表面，或ii）耐腐蚀表面。