FTSR铁素体区轧制生产SPHE钢的组织与性能
Microstructure and Properties of SPHE Steel Produced by Ferrite Rolling Using FTSR
夏培培1, 康永林1, 王 强2, 梅淑文2
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作者单位:1.北京科技大学 材料学院, 北京 100083; 2. 唐山钢铁集团公司技术中心, 河北 唐山 063000
中文关键字:铁素体区轧制; SPHE; 微观组织; 织构; 性能
英文关键字:ferrite rolling on FTSR; SPHE; microstructure; texture; properties
中文摘要:采用金相观察、 透射电镜、 化学相分析、 XRD织构检测及性能测试等手段分析了FTSR铁素体区轧制工艺生产的SPHE热轧板的微观组织及力学性能, 探讨了一种生产SPCE级深冲用钢冷轧基板的新思路。研究结果表明: 热轧态组织为粗大而不均匀的铁素体, 晶粒沿轧向伸长, 组织中有较多细小的析出粒子和高密度位错, 有利于冲压性能的{111}织构较弱, 但各种类型的织构分布相对较均匀;SPHE热轧板的性能水平:σ0.2为220 MPa,σb为290 MPa,伸长率δ为37.5%,n值为0.20。
英文摘要:The microstructure and properties of SPHE hot rolled sheets produced by ferrite rolling using FTSR were studied by means of metallographic observation, TEM, chemical phase analysis, XRD texture measurement and property testing. The results show that the hot rolling microstructure is coarse and inhomogeneous ferrite, and the grains stretch along the rolling direction, there exists a huge amount of secondary phase precipitates and high density dislocations, the {111} texture which is favorable to tensile properties is weak, however, the texture distribution of each type is relatively uniform. The properties of SPHE holt rolled sheets are as follows: σ0.2=220 MPa, σb=290 MPa, δ=37.5% and n=0.20.