预先热处理对20MnVB钢奥氏体晶粒度及冲击韧性的影响  

Influences of Pretreatment on Austenite Grain Size and Impact Toughness of 20MnVB Steel

作　　者：赵西成[1] 于大全[1] 

机构地区：[1]西安建筑科技大学冶金工程学院

出　　处：《机械工程材料》1999年第4期14-15,21,共3页Materials For Mechanical Engineering

基　　金：冶金工业部基金

摘　　要：研究了预先热处理对２０ＭｎＶＢ钢奥氏体晶粒度及冲击韧性的影响。结果表明，该钢经１２５０℃×１ｈ固溶处理＋８６０℃×１ｈ水淬预先热处理后钢的奥氏体本质晶粒度可达９＿１０级，８６０℃油淬＋２００℃回火后钢的冲击韧性可达１６２Ｊ／ｃｍ２。Abstract The influences of pretreatment on austenite grain size and impact toughness of 20MnVB steel have been investigated. The results show that the influences depend on the dissolution and precipitation behaviors of carbonitride precipitated phase. After the treatment at 1250℃×1h and water quenching at 860℃×1h, the austenite inherent grain size of the steel is up to 9_10 grade and the impact toughness of the steel after oil hardening at 860℃×1h and tempering at 200℃×1h is 162J/cm 2.

关 键 词：硼钢 晶粒度 冲击韧性 预先热处理 

分 类 号：TG142.33[一般工业技术—材料科学与工程] TG161[金属学及工艺—金属材料]