摘要
对0Cr21Mn17Mo2Nb N高氮无镍奥氏体不锈钢进行1140℃固溶处理,水淬冷却,然后在800℃进行不同保温时间的时效处理,并利用光学显微镜、扫描电镜、透射电镜和洛氏硬度计来观察等温时效下实验钢的析出状况以及实验钢的硬度。实验结果表明,随800℃等温时间的延长,Cr2N不断以粒状、短棒状、片层状形式析出;时效时间不断延长,氮化物的析出伴随有σ相析出;由于时效过程中Cr2N的长大和σ相的析出,硬度总体呈现先上升后下降再接着上升的状态。
Solid solution at 1140 ℃, water quench cooling and then aging at 800℃ for different holding time for0Cr21Mn17Mo2 Nb N high nitrogen and low nickel austenitic stainless steel was carried out. Precipitate phase was observed by OM, SEM and TEM; hardness was measured by rockwell hardness tester. Results show that with the increase of isothermal time at 800 ℃, Cr2 N precipitates unceasingly in the form of granular, short rod, stratified precipitation; Aging time prolonging,the precipitation of nitride with σ phase separates. Due to the limitation of Cr2 N grew up, and in the process of σ phase precipitation, generally hardness increases first, then reduces and rises again at last.
出处
《热加工工艺》
CSCD
北大核心
2014年第22期109-111,115,共4页
Hot Working Technology
关键词
高氮无镍奥氏体不锈钢
等温时效
氮化物
硬度
high nitrogen and low nickel austenitic stainless steel
isothermal aging
nitride
hardness
