化学成分和热处理温度对T122耐热钢中δ-铁素体含量的影响  

Effect of Chemical Composition and Heat Treatment Temperature on δ-Ferrite Content in T122 Heat Resistant Steel

作　　者：包汉生[1] 程世长[1] 刘正东[1] 谭舒平[1,2] 

机构地区：[1]钢铁研究总院,北京100081 [2]哈尔滨工业大学航天学院,黑龙江哈尔滨150001

出　　处：《钢铁》2009年第12期74-78,共5页Iron and Steel

基　　金：科技部863计划项目(2006AA03Z513)

摘　　要：采用Thermocalc热力学计算研究了化学成分和温度对T122钢中δ-铁素体含量的影响,计算和相应试验结果表明,化学成分和热处理温度变化对δ-铁素体含量影响显著,铬含量降低,氮含量和碳含量增加,能明显降低δ-铁素体含量。在1 030～1 070℃的温区热处理,δ-铁素体含量最低;超过1 200℃热处理会产生γ-Fe→γ-Fe＋δ-Fe转变,即在低于1 200℃处理不含δ-铁素体的钢中会生成δ-铁素体。With Thermocalc thermodynamic equilibrium phase calculations and experimental analysis,the effect of chemical compositions and heat treatment temperature on δ-ferrite content in T122 heat resistant steels was studied.The results show that chemical compositions and heat treatment temperature affect δ-ferrite content obviously.Decreasing chromium content and increasing nitrogen,carbon content can decrease δ-ferrite content greatly.There is a proper heat treatment temperature zone ranging from 1 030 ℃ to 1 070℃,which leads to the lowest δ-ferrite content. When the temperature exceeds 1 200 ℃, the reaction happens, γ-Fe→γ-Fe＋-δ-Fe, and δ-ferrite forms in the steel which isn＇t contain δ-ferrite treated temperature below 1 200 ℃,

关 键 词：化学成分 热处理温度 T122耐热钢 Δ-铁素体 

分 类 号：TG142.15[一般工业技术—材料科学与工程]