Cr-Mo合金渗碳钢厚壁齿套锻坯预备热处理试验研究

Experimental Study on Preheat Treatment of Cr-Mo Alloy Carburized Steel Thick-Walled Tooth Sleeve Forging Blanks

通过对Cr-Mo合金渗碳钢厚壁齿套锻坯进行不同加热温度和保温时间的等温正火工艺试验,最终确认该类齿套锻坯适宜的等温正火工艺参数为620℃×4 h。采用该等温正火工艺处理后,在锻坯的锻造连皮位置不会出现贝氏体或马氏体等异常组织,后续加工过程没有拉刀损坏现象。

Isothermal normalization process test is conducted with different heating temperature and heat preservation time for Cr-Mo alloy carburized steel thick-walled tooth sleeve forging blank,and the suitable isothermal normalization process parameters for this type of tooth sleeve forging blank is finally confirmed to be 620℃×4 h.After the isothermal normalization treatment,the forging blank will not have any abnormal structure such as bainite or martensite in the forging skin position,and there is no broach damage during the subsequent processing.