E36高强度球扁钢的静态再结晶
Static-Recrystallization Behavior of E36 High Strength Ball Flat Steel
摘 要
在热模拟试验机上利用双道次压缩方法研究了E36高强度球扁钢在不同温度下两次变形弛豫的静态再结晶行为.结果表明:E36钢在900 ℃以上变形时,再结晶过程较快,在30~50 s内均已完成完全再结晶;在900 ℃时,再结晶过程明显减慢,弛豫1 000 s再结晶体积分数还不到50%,再结晶孕育期增至40 s左右;850 ℃时再结晶已非常困难,弛豫4 000 s后由于奥氏体静态再结晶数量多,最终组织拉长的贝氏体晶粒较驰豫1 000 s的少,大部分是由再结晶后等轴奥氏体晶粒转变而来的细小、均匀的贝氏体晶粒,沿晶界有较多针状铁素体晶粒.
热模拟
静态再结晶
E36 high strength ball flat steel
thermal simulation
static-recrystallization
Abstract
Static-recrystallization behavior was studied for the E36 high strength ball flat steel on thermal simulator by double pass compression at different temperatures with twice deformation relaxation.The results show that full static-recrystallization occurred quickly in deformed austenite of E36 steel above 900 ℃ within 30-50 s.The recrystallization process slowed down significantly at 900 ℃,and recrystallization volume fraction was less than 50% even if increased the relaxation time to 1 000 s and the recrystallization preparative time increased to 40 s.The recrystallization was very difficult at 850 ℃.The elongated bainite grain of relaxation 4 000 s was less than relaxation 1 000 s because austenite static-recrystallization amount was large,which consisted of homogenous and fine bainite by exquiaxial austenite transition and acerose ferrite along grain boundary.
中图分类号 TG142
所属栏目 试验研究
基金项目 武汉市科技计划资助项目(20061002085)
收稿日期 2008/10/24
修改稿日期 2009/5/26
网络出版日期
作者单位点击查看
备注任安超(1976-),男,河南新乡人,博士研究生.
引用该论文: REN An-chao,JI Yu,HAN Bin,ZHOU Gui-feng,YUAN Ze-xi. Static-Recrystallization Behavior of E36 High Strength Ball Flat Steel[J]. Materials for mechancial engineering, 2009, 33(12): 24～26
任安超,吉玉,韩斌,周桂峰,袁泽喜. E36高强度球扁钢的静态再结晶[J]. 机械工程材料, 2009, 33(12): 24～26
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参考文献
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【3】FERMNDEZ A I,LOPEZ B,RODRIGUEZ IBABE J M.Relationship between the austenite recrystallization fraction and the softening measured from the interrupted torsion test technique[J].Script Materialia,1999,40(5):543-549.
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