前言 CA141载货汽车6102发动机采用的冷激合金铸铁挺杆是一项新技术。这种新型挺杆经1000小时台架试验表明,使用寿命超过了20万公里,其质量达到了国际先进水平。试验表明,冷激合金铸铁挺杆的质量好坏,不仅与挺杆的材料及造型工艺有关,而且与热处理淬火工艺有直接关系。本文探讨了影响冷激合金铸铁挺杆金相组织的热处理工艺因素及改善热处理工艺的有关措施。一、试验方法和试验结果 Foreword The cold-alloyed cast iron tappet used in the CA141 lorry 6102 engine is a new technology. This new tappet by 1000 hours bench test shows that the service life of more than 200,000 km, its quality has reached the international advanced level. The test shows that the quality of the cold-forged alloy cast iron tappet is not only related to the material of the tappet and the molding process but also to the heat treatment quenching process. In this paper, the factors that affect the microstructure of cold-forged alloy cast iron tappets and the measures to improve the heat treatment process are discussed. First, test methods and test results