45钢主轴热处理畸变原因分析与改进措施  

Distortion and countermeasures of 45 steel mainshaft quenched and tempered

作　　者：王倩[1] 田加红[1] 丁霞[1] 李保民 董庆信 李木森[1] 

机构地区：[1]山东大学材料液固结构演变与加工教育部重点实验室,山东济南250061 [2]山东博特精工股份有限公司,山东济宁272071

出　　处：《金属热处理》2013年第5期115-118,共4页Heat Treatment of Metals

基　　金：国家工信部重大专项课题(2011ZX04014-031)

摘　　要：针对某批45钢主轴经淬火及调质处理后存在畸变大的问题,通过金相观察和硬度测定进行了分析,发现该主轴在热处理时由于冷却速度不均匀导致微观组织的不均匀,并存在网状铁素体而引起热处理畸变,并据此提出了通过正火处理消除网状铁素体,进而采用亚温淬火以减小热处理畸变的改进措施。The over distortion of 45 steel mainshaft quenched as well as quenched and tempered was analyzed through microstructure and hardness test. It is found that the microstructure is uneven with ferrite network due to the non-uniform cooling in different positions of the mainshaft during heat treatment process. Accordingly, the countermeasures such as eliminating ferrite network by normalizing and adopting subcritical hardening were proposed.

关 键 词：45钢主轴 畸变 显微组织 硬度 

分 类 号：TG162.71[金属学及工艺—热处理]