节镍型奥氏体不锈钢中形变马氏体的产生和逆变规律  

Rules of formation and reversion of deformation induced martensite in low-nickel austenitic stainless steel

作　　者：沃海波 季灯平[1] 吴狄峰[2] 

机构地区：[1]宝钢不锈钢有限公司,上海200431 [2]宝山钢铁股份有限公司,上海201900

出　　处：《宝钢技术》2013年第4期60-63,共4页Baosteel Technology

摘　　要：通过不同保温时间的退火处理,获得了具有不同晶粒度的节镍型奥氏体不锈钢试验材料。利用Gleeble-3000热模拟机进行不同变形程度、变形温度的冷加工,分析了变形程度、变形温度和原始晶粒度对形变马氏体含量的影响。对轧硬态节镍型奥氏体不锈钢进行不同温度和时间的热处理,研究了形变马氏体的逆变规律。结果表明,冷加工过程中,变形程度和变形温度对形变马氏体的产生有重要影响,而材料的原始晶粒度对形变马氏体含量没有显著影响。形变马氏体发生逆变的临界温度约为550℃,在800℃时,形变马氏体可以在20 s之内消除。Experimental materials of low-nickel austenitic stainless steel with different grain sizes were obtained through annealing with different holding time. Cold-working at various deformation extents and temperatures was performed by means of a Gleeble - 3000 type machine, and effects of the deformation extent, temperature and original grain size on the content of deformation induced martensite were analysed. After heat treatments at different temperatures and with different holding time were performed for cold-rolled low-nickel austenitic stainless steel, the reversion rule of deformation induced martensite was studied. The results show that the deformation extent and temperature have significant effects on the formation of deformation induced martensite, while the effect of the original grain size is negligible. It has also been found that the critical temperatrue of deformation induced martensite reversion is about 550℃ and that a complete reversion process can be finished within 20 s at 800℃.

关 键 词：节镍型奥氏体不锈钢 形变马氏体 变形程度 

分 类 号：TG142.71[一般工业技术—材料科学与工程]