摘要
用马氏体逆转变晶粒细化方法对大块料1Cr18Ni9Ti奥氏体不锈钢进行组织细化研究,并分析了冷变形后再结晶退火温度和保温时间对晶粒度的影响等。结果获得经90%冷变形的1Cr18Ni9Ti不锈钢的最佳再结晶退火工艺规范为:加热至800℃保温40min后空冷,在此工艺条件下,得到的奥氏体晶粒直径为6～10μm,而且等轴化程度最好,碳化物析出量最少。
The ultrafine mechanism of bulk 1Cr18Ni9Ti austenitic stainless steel was investigated using martensite reversal transformation ultrafine grain method. And the influences of recrystallization annealing temperature and holding time on grain size were analyzed. The results show that the optimal recrystallization annealing process of 1Cr18Ni9Ti stainless steel to abtain 90% cold transformation is at temperature of 800 ℃ holding 40 min. In this case, the size of γ-grain is minimal （about6-10μm）, the best equilateral grade is obtained and the quantity of precipitated carbides is also minimal.
出处
《热加工工艺》
CSCD
北大核心
2008年第20期24-26,30,共4页
Hot Working Technology
关键词
奥氏体不锈钢
晶粒细化
马氏体逆转变
冷变形
austenitic stainless steel
ultrafine-grain
martensite reversal transformation
cold transformation
