Y基重稀土变质剂的加入量对ZGMn13组织和力学性能的影响  

Effects of various amount addition of heavy rare earth yttrium on microstructure and mechanical properties of high manganese steel

作　　者：杨乘东[1] 周荣锋[1] 李祖来[1] 蒋业华[1] 

机构地区：[1]昆明理工大学机电工程学院

出　　处：《特种铸造及有色合金》2008年第S1期283-286,共4页Special Casting & Nonferrous Alloys

摘　　要：用Y基重稀土对ZGMn13进行变质处理,研究不同稀土加入量对高锰钢组织和力学性能的影响。结果表明,随着稀土加入量的增加,奥氏体晶粒尺寸先减小再增大,而抗拉强度和冲击韧度呈先增大后减小的趋势。当稀土加入量为0.3%时(残余量为0.023%),奥氏体晶粒尺寸最小(109.88μm),抗拉强度和冲击韧度最大(分别为200.64MPa,1088.11kJ/m2)。变质机理研究表明,稀土加入量较少时,引入的稀土氧化物等高熔点非均质形核的核心较少,对晶粒的细化和力学性能的改善效果不明显。过多的加入量又会毒化形核核心,使晶粒长大,同时在晶界和晶界附近析出连续分布的第二相,使力学性能变差。Effects of various amount addition of heavy rare earth yttrium on microstructure and mechanical properties of high manganese steel was studied. Results showed that with the addition of rare earth increased, austenite grain size refined at first and then enlarged. Tensile strength and impact toughness improved firstly and then decreased . The size of austenite reached the minimal value (109.88μm) while tensile strength and impact toughness reached the maximum value(200.64 MPa and 1 088.11 KJ/m2 respectively)...

关 键 词：Y 重稀土 变质处理 高锰钢 

分 类 号：TG142.15[一般工业技术—材料科学与工程]