复合变质处理对铸造压铸模具钢组织和性能的影响  

Effects of Compound Modification on Microstructure and Mechanical Properties of Cast Steel for Die-Casting Die

作　　者：易大伟[1] 刘炳[1] 吴笛[1] 

机构地区：[1]新疆大学机械工程学院,新疆乌鲁木齐830008

出　　处：《热加工工艺》2007年第9期9-10,13,共3页Hot Working Technology

基　　金：新疆维吾尔自治区高校科研计划科学研究重点项目(XJEDU2006I11)

摘　　要：研究了1000℃淬火和600℃回火温度下铸造压铸模具钢在未变质和经RE,RE-Nb,RE-Nb-Ti变质后的组织和力学性能。结果表明:铸造压铸模具钢经不同变质剂变质后,其硬度变化不大而冲击韧度有大幅度的提高,组织明显细化,碳化物的形态及分布明显改善,冲击试样断口由准解理断口向韧性断口变化。The microstructure and mechanical properties of die-casting die steel which weren＇t modified and were modified by RE,RE-Nb,RE-Nb-Ti were studied after quenching at 1 000℃ and tempering at 600℃.The results show that, after being modified by different modifier, the hardness of die-casting die steel has a little difference, impact toughness rises prominently. The microstructure becomes weenier, the shape and distributing of carbide are improved, impact fracture becomes tough fracture fi＇om quasi-cleavage fracture.

关 键 词：铸造压铸模具钢 复合变质处理 力学性能 

分 类 号：TG243.1[金属学及工艺—铸造] TG249.2