发动机12.9级连杆螺栓的材料与工艺  

Material and Process of the 12.9-Grade Con Rod Bolts

作　　者：高伟[1] 

机构地区：[1]第一汽车集团公司技术中心

出　　处：《汽车技术》2005年第11期28-30,共3页Automobile Technology

摘　　要：为实现12.9级螺栓的国产化,以发动机连杆螺栓为对象,研究了12.9连杆螺栓的材料和工艺。研究结果表明,35CrMo钢是发动机12.9级连杆螺栓的优良材料,可满足12.9级螺栓材料的力学性能要求。对12.9级连杆螺栓采取氮气保护热处理、杆部缩细冷镦、热处理后滚丝是可行的工艺方法,可生产出高质量、高精度螺栓,而且满足批量生产要求。In order to localize the 12.9-grade bolts,with the engine con rod bolts as the objective, the material and process of the 12.9-grade con rod bolts are studied.It is shown that 35CrMo steel is the superior material for the con rod bolts,which meets the mechanical requirements of 12.9-grade bolts.Nitrogen heat treatment,thinning and cold heading of body of bolt and thread rolling after heat treatment are all effective processes to produce high quality,high accuracy 12.9- grade bolts and they meet requirements of mass production.

关 键 词：发动机 连杆螺栓 材料 工艺 

分 类 号：U464.133[机械工程—车辆工程]