锰对热轧TWIP钢组织及力学性能的影响  

Effect of Manganese on Microstructure and Mechanical Properties of Hot-rolled TWIP Steel

作　　者：代晓莉[1,2] 郭佳 刘杰[1,2] DAI Xiaoli;GUO Jia;LIU Jie(Shougang Research Institute of Technology,Beijing 100043,China;Beijing Key Laboratory of Green Recyclable Process for Iron & Steel Production Technology,Beijing 100043,China)

机构地区：[1]首钢技术研究院,北京100043 [2]绿色可循环钢铁流程北京市重点实验室,北京100043

出　　处：《上海金属》2019年第3期77-80,共4页Shanghai Metals

摘　　要：通过扫描电子显微镜、电子背散射衍射和力学分析等方法研究了Mn元素对热轧TWIP钢组织及力学性能的影响。结果表明:随着Mn的质量分数由5%增加到20%,试验钢中奥氏体不断增多,马氏体逐渐减少,宏观上表现为强度降低、塑性和韧性提高;拉伸断口由解理断裂转变为韧窝断裂;当锰的质量分数高于15%时,常温下得到单一奥氏体组织,并且伴有片状的孪晶组织。Effects of Manganese on the microstructure and mechanical properties of hot-rolled TWIP steel were investigated by scanning electron microscopy,electron back-scattered diffraction and mechanical testing.The results showed that as the mass fraction of Mn increased from 5% to 20%,the austenite in test steel increased and the martensite decreased gradually,macroscopically,the strength decreased,but the plasticity and toughness increased,and that the tensile fracture of test steel changed from cleavage fracture into dimple fracture.When the mass fraction of Mn was above 15%,a single austenite structure could be obtained at normal temperature,and accompanied by lamellar twins.

关 键 词：热轧TWIP钢 锰 显微组织 力学性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TG335.11[金属学及工艺—金属材料] U465[金属学及工艺—金属学]