论文部分内容阅读
将0Cr18Ni9奥氏体不锈钢加热至熔化后分别以不同冷却速度进行冷却,研究了冷却速度对相转变温度的影响,分析了不同组织形貌产生的机理。结果表明:冷却速度为10℃/min时,初生铁素体形成温度为1 452.5℃,包晶反应生成奥氏体形成温度为1 368.4℃,铁素体转变为奥氏体形成温度为1 077.3℃,残留δ铁素体形貌为蠕虫状;冷却速度为20℃/min时,上述温度分别为1 447.9、1 348.2、1 013.8℃,残留δ铁素体形貌从蠕虫状向骨架状转变;冷却速度为30℃/min时,上述温度分别为1 431.8、1 326.0、998.3℃,残留δ铁素体形貌为骨架状。
The 0Cr18Ni9 austenitic stainless steel was heated to melt after cooling at different cooling rates. The influence of cooling rate on the phase transition temperature was studied. The mechanism of different microstructures was analyzed. The results show that when the cooling rate is 10 ℃ / min, the formation temperature of primary ferrite is 1 452.5 ℃, the formation temperature of peritectic reaction is 1 368.4 ℃, the ferrite transformation is austenite formation temperature is 1 077.3 ℃, the morphology of residual δ-ferrite is worm-like; when the cooling rate is 20 ℃ / min, the temperature is 1 447.9,1 348.2,1 013.8 ℃ respectively, the morphology of residual δ-ferrite changes from vermicular to skeletal When the cooling rate is 30 ℃ / min, the above temperatures are respectively 1 431.8, 1 326.0 and 998.3 ℃, and the residual δ-ferrite morphology is in the form of framework.