Mn对低碳钢中奥氏体向铁素体转变的影响  

Effect of Mn on Microstructure and Hardness of Ausenit-ferrite Transformation of Low Carbon Steel

作　　者：李辉成[1] 岳旭东[1] 陈淑英[1] 杨鸿铭[1] 

机构地区：[1]辽宁工业大学材料学院,辽宁锦州121001

出　　处：《钢铁钒钛》2014年第4期118-121,共4页Iron Steel Vanadium Titanium

基　　金：国家自然科学基金科学部主任基金(51141010)

摘　　要：采用热膨胀仪、金相显微镜、扫描电镜、显微硬度计研究Mn对低碳钢中奥氏体向铁素体转变温度和凝固组织的影响。试验结果发现:随着Mn含量的提高,转变初始温度降低,转变区间变大;生成的铁素体晶粒尺寸变大;针状铁素体数量增加;凝固组织的显微硬度增加。The effect of Mn on microstructure and hardness of austenit-ferrite transformation was studied by thermal dilatometer,metallographic microscope,scanning electron microscope（ SET） and microhardness tester.The result show that higher Mn content leads to reduce austenite-ferrite transformation temperature,widen transformation region and consequently ferrite grain size becomes larger,the volume of acicular ferrite and microhardness of transformed structure increase.

关 键 词：低碳钢 先共析铁素体 锰 转变温度 凝固组织 

分 类 号：TG142.31[一般工业技术—材料科学与工程]