B元素对SPHC组织性能的影响  

Effect of B Elements on the Microstructure and Properties of SPHC

作　　者：李进[1] LI Jin

机构地区：[1]马钢股份公司技术中心,安徽马鞍山243000

出　　处：《安徽冶金科技职业学院学报》2018年第3期8-10,共3页Journal of Anhui Vocational College of Metallurgy and Technology

摘　　要：选取含B元素和不含B元素的SPHC为试验材料,通过拉伸试验、金相分析和SEM电镜扫描等方法,分析两种钢组织和力学性能差异。研究结果表明:不含B的SPHC组织为铁素体+珠光体,析出物为MnS;含B的SPHC的组织为铁素体+贝氏体,析出物为MnS和BN的混合物;含B的SPHC内部组织偏大,强度偏低,延伸率偏低。Select SPHC with B elements and without B elements as test materials,analyse the difference of microstructure and mechanical properties between two kinds of steel by tensile test、metallographic analysis and scanning electron microscope. The results showed that the structure of SPHC without B is ferrite ＋ pearlite,the precipitates is Mn S,the structure of SPHC with B is ferrite ＋bainite,the precipitates are mixtures of Mn S and BN,SPHC with B is larger in grain,lower in strength and lower in elongation.

关 键 词：SPHC B 组织 力学性能 

分 类 号：TG142.13[一般工业技术—材料科学与工程]