50W470无取向电工钢高温力学性能研究  

High Temperature Mechanical Properties of 50W470 Non-oriented Electrical Steel

作　　者：花艳侠 李激光[1] 张晨[2] 项利[2] 仇圣桃[2] 

机构地区：[1]辽宁科技大学,辽宁鞍山114000 [2]钢铁研究总院连铸技术国家工程研究中心,北京100081

出　　处：《热加工工艺》2015年第18期64-66,共3页Hot Working Technology

摘　　要：采用Gleeble3800应力/应变热模拟试验机,对现场生产的50W470无取向电工钢（0.0029%C,1.60%Si）进行了高温力学性能测试。结果表明,50W470无取向电工钢有着良好的热塑性,只存在第Ⅲ脆性温度区（600～750℃）,不存在第Ⅱ脆性区。这是因为该成分无取向电工钢在凝固冷却过程中酌相含量很少,难以对钢的热塑性产生较大的不利影响。同时,动态再结晶的发生使得形变过程中晶界的应力集中得到缓解,阻止了裂纹的扩展。The high temperature mechanical properties of 50W470 non-oriented silicon steel（0.0029% C, 1.60%Si） were tested by Gleeble-3800 stress/strain thermal simulation machine. The results show that there is only the third brittle temperature zones（600℃-750℃） for the test steel with good thermal plasticity, the second brittle zones does not exist. The reason is that there is little γ phase in the process of solidification and cooling for the test steel. It is difficult to make a greater negative impact on the thermal plasticity of the steel. At the same time, the dynamic recrystallization eases the stress concentration in grain boundary in the deformation process, which prevents the crack propagation.

关 键 词：无取向电工钢 高温力学性能 动态再结晶 

分 类 号：TG142.77[一般工业技术—材料科学与工程]