一种下拉杆（SZ804）零件的热处理工艺研究

A Rod （SZ804） Part Heat Treatment Process

东方红大轮拖SZ804下拉杆材料60Si2Mn，形状为板条状，技术要求HRC37~42要求校平，生产中出现淬火硬度不足及校平中多次出现断裂情况，这个问题长期困扰着我们，通过改进工艺把原来油淬改为水淬，增加回火时间，消除淬火应力。有效地控制了淬火硬度不足，校平断裂等，使问题得到了解决。

Dongfanghong--wheel tractor SZ804 under the rod material 60Si2Mn shape lath technical requirements HRC37 - 42 requires leveling, production appear, quenching hardness and leveling several times a fracture, this issue has long plagued byimprove the process instead of the original oil quenching water quenching, increasing tempering time, eliminating the quenching stress. Control the quenching hardness leveling fracture, etc. , so that the problem has been resolved.