稀土变质剂对热冲压成型钢夹杂物形貌及尺寸分布的影响  

Influence of rare earth modifier on the nonmetallic inclusion morphology and size distribution about hot stamping

作　　者：杨丽[1] 孙雅平[1] 李永亮 陈彤 孙天昊 Yang Li;Sun Yaping;Li Yongliang;Chen Tong;Sun Tianhao(Tangshan Vocational College of Science and Technology,Tangshan 063001,Hebei,China;Tangshan Iron and Steel Group Co.,Ltd.,Tangshan 063016,Hebei,China)

机构地区：[1]唐山科技职业技术学院,河北唐山063001 [2]唐山钢铁集团有限责任公司,河北唐山063016

出　　处：《钢铁钒钛》2022年第1期174-179,共6页Iron Steel Vanadium Titanium

基　　金：中央引导地方科技发展专项资金项目(YDZX20191400004587)。

摘　　要：利用光学显微镜、扫描电镜等手段研究了稀土变质剂对1500 MPa级热冲压成型用钢夹杂物形貌、尺寸和分布状态的影响,并在此基础上对钢的显微组织和常温塑性进行了对比评价。结果显示:添加稀土变质剂后,铸坯中心偏析现象消失;与未进行变质剂处理的钢相比,粗大的D类质点夹杂物显著降低,但D类夹杂的密度并未减少;产品的显微组织得到有效细化,常温塑性显著提高,对材料性能提升效果显著。The influence of rare earth modifier on nonmetallic inclusion morphology and size distribution of 1500 MPa grade hot stamping steel were investigated by optical microscope and scanning electron microscope.And the microstructure and plastic property of resulted steel at room temperature were compared.The results showed that macro segregation disappeared in the rare earth modifier treated steel.After rare earth modifier treatment,the size of D-type particle inclusion decreased obviously,however,the density of inclusion kept increasing.With the rare earth modifier treatment,the microstructure was refined apparently and the plastic property at room temperature was improved.

关 键 词：热冲压成型钢 稀土 夹杂物 形态 尺寸 

分 类 号：TF76[冶金工程—钢铁冶金] TG142.1[一般工业技术—材料科学与工程]