热轧奥氏体不锈钢带钢的退火工艺机理  

Annealing process mechanism of hot-rolled austenitic stainless steel strip

作　　者：李勇华[1] 邵远敬[1] 贺立红[1] 

机构地区：[1]中冶南方工程技术有限公司技术研究院,湖北武汉430223

出　　处：《中国冶金》2015年第8期23-27,共5页China Metallurgy

摘　　要：总结分析了热轧奥氏体不锈钢带钢的退火工艺机理，研究结果可知：热轧奥氏体不锈钢带钢退火时，在500~870℃之间需快速加热，加热速度为10~31℃／s，以防止碳化物和σ相析出、 δ-铁素体分解，并且在1020℃以上保温一段时间，时间大于11S，以使组织充分再结晶软化，碳化物、σ相充分固溶，δ-铁素体质量分数降到最低，然后在870~500℃之间需快速冷却，冷却速度为38~100℃／s，以防止已经固溶了的碳化物、σ相重新析出。The annealing process mechanism of the hot-rolled austenitic stainless steel strip was analysed in detail. The results show that in order to prevent carbide, σ phase from precipitating and δ-ferrite from being broken, the strip must be heated rapidly between 500-870 ℃ in annealing process, at the heating speed from 10-31 ℃/s. Then the temperature would remain above 1020℃ for more than 11 s. In this process, the strip was recrystallized and be- came fully soft, the carbide and σ phase also dissolved fully, and the content of δ-ferrite reduced to minimum. After that, the strip was cooled rapidly between 870-500 ℃, and the cooling rate was from 38-100 ℃/s. This cooling process could effectively prevent the dissolved carbides and a phase from precipitating again.

关 键 词：再结晶 碳化物 Σ相 Δ铁素体 

分 类 号：TG335.11[金属学及工艺—金属压力加工] TG156.2