残留形变对低碳钢薄板显微组织的影响  

EFFECT OF RETAINED DEFORMATION ON MICROSTRUCTURES OF LOW-CARBON STEEL SHEETS

作　　者：浦绍康[1] 

机构地区：[1]武汉钢铁公司

出　　处：《钢铁》1993年第7期51-54,11,共5页Iron and Steel

摘　　要：热连轧低碳带钢生产过程中,当终轧温度低于或接近Ar_3温度时,终轧前钢板局部表面处于α+γ双相区,形成部分铁素体晶粒,终轧后该部位经形变的铁素体具有残留形变,在较高温度卷取后,钢板近表层产生不均匀组织或晶粒发生异常粗化。文中分析了残留形变和卷取温度对薄板近表层显微组织的影响,并对晶粒异常粗化的原因和形成条件进行了试验验证。During hot continuous rolling, local surface temperature of low carbon steel sheet decreases to (α+γ) region prior to finish rolling and some ferrite grains forms when finish rolling temperature approachs (or goes under) Ar_3. There is retained deformation on the local surface after finish rolling, inducing tnhomogeneous microstructures or unusual grain coarsening on the surface layer. Effect of the retained deformation and coiling temperature on microstructures of steel sheets have been investigated. A hot-deformed experiment has been performed to verify the process factors causeing grain coarsening.

关 键 词：显微组织 铁素体 低碳钢 薄板 终轧温度 热连轧 形变 影响 局部 残留 

分 类 号：TF777[冶金工程—钢铁冶金] TG335[金属学及工艺—金属压力加工]