718预硬化塑料模具钢大型模块的组织和硬度分析  

Microstructure and hardness of 718 prehardened plastic mould steel large block

作　　者：王勇围[1] 郭强 康爱军 顾容 董瀚[1] 马党参[1] 陈再枝[1] 

机构地区：[1]钢铁研究总院结构材料所,北京100081 [2]抚顺特殊钢股份有限公司,辽宁抚顺113001

出　　处：《金属热处理》2010年第8期88-90,共3页Heat Treatment of Metals

基　　金：国家科技支撑计划项目(2007BAE51B04)

摘　　要：对810 mm厚的718预硬化塑料模具钢大模块进行解剖,测定了模块的硬度分布,并对不同部位的组织进行了金相和透射电镜观察。结果表明,整个模块硬度差≤3.2 HRC,大模块组织由回火马氏体和回火贝氏体组成,且成分较均匀,夹杂物含量少,能满足大尺寸塑料制品行业的使用要求。The 718 prehardened plastic mould steel large block with thickness of 810 mm was dissected,and the hardness and microstructure over the section were tested and observed.The results show that the hardness fluctuation in the whole block is no more than 3.2 HRC,and the microstructure is composed of tempered martensite and bainite with small amount of inclusions.It is shown that the 718 prehardened steel large mould block can meet the application requirement of large-scale plastic produces industry.

关 键 词：718钢大模块 硬度 回火贝氏体 夹杂物 

分 类 号：TG142.45[一般工业技术—材料科学与工程]