不同热处理工艺对18CrNiMo7-6高温晶粒度影响  

Effect of Different Heat Treatment Processes on High Temperature Grain Size of 18CrNiMo7-6

作　　者：夏冬冬 陈斌 刘红杰 Xia Dongdong;Chen Bin;Liu Hongjie(Jiangyin Xingcheng Special Steel Co.,Ltd.,Jiangyin Jiangsu 214429,China)

机构地区：[1]江阴兴澄特种钢铁有限公司,江苏江阴214429

出　　处：《山西冶金》2024年第1期8-9,共2页Shanxi Metallurgy

摘　　要：针对18CrNiMo7-6锻打热处理后高温渗碳出现混晶现象,对锻后不同热处理工艺及冷却速度试样进行了对比分析,认为不同热处理及冷却速度对AlN析出长大起到至关作用,快速冷却的试样在回火过程中析出物细小、弥散分布,在高温渗碳过程中起到钉扎晶界作用,阻碍晶粒长大,防止高温渗碳混晶。In response to the phenomenon of mixed crystals in high-temperature carburization of 18CrNiMo7-6 after forging heat treatment,a comparative analysis was conducted on samples with different heat treatment processes and cooling rates after forging.It is believed that different heat treatment and cooling rates play a crucial role in the growth of AlN precipitation.Samples with rapid cooling have small and dispersed precipitates during the annealing process,which plays a role in pinning grain boundaries and hinders grain growth during high-temperature carburization,and prevents high-temperature carburization and crystal mixing.

关 键 词：热处理 高温晶粒度 混晶 

分 类 号：TG156[金属学及工艺—热处理]