SUS304-2B不锈钢薄板退火工艺研究  

Study on Annealing Processing of SUS304-2B Austenitic Stainless Steel

作　　者：韩飞[1] 林高用[1] 彭小敏[1] 余均武[1] 彭大暑[1] 

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《热加工工艺》2004年第4期25-27,共3页Hot Working Technology

基　　金：中南大学材料科学与工程学院创新实验室资助(02-01)

摘　　要：采用单向拉伸实验研究了SUS304-2B不锈钢薄板的加工硬化规律;采用退火实验研究了该合金硬化后的退火软化规律和机理,确定了其最佳的退火工艺参数。实验表明,冷加工后该合金强度明显增加,塑性降低;并且随着形变量的增加,组织中形变孪晶数目增多,加工硬化的程度增加;对不同加工硬化程度的试样,在低温(100～490℃)下退火35min(空冷)后再拉伸,其力学性能基本不变,退火软化效果不明显;在高温(900～1050℃)下退火3～10min(快冷),该合金组织发生完全再结晶,且晶粒大小较均匀,退火软化效果明显。由此确定,SUS304-2B不锈钢最佳退火工艺为:在1020～1150℃下退火3min(快冷)。The work hardening behavior of SUS304-2B austenitic stainless steel was studied by tensile testing,and the law and mechanics of the softening was investigated by annealing testing. The results show that the strength parameters (HV,σ_s,σ_b) of the steel increase and the plasticity parameters (δ?ψ) decrease with the increase of cold deformation value; the work-hardening may be more severe with larger strain; the samples with different degree of work hardening are re-deformed after low-temperature annealing at 100～490℃ for 35min, and air cooling,the mechanical properties change slightly, the effects of softening is not obvious; in contrast, the same samples annealed at 900～1050℃ for 3～10 min, and water cooling, obvious effects of softening is obtained by fully re-crystallization. Then the best annealing process of SUS304-2B austenitic stainless steel is determined as annealing at 1020～1150℃ for 3min, and water cooling.

关 键 词：奥氏体不锈钢 加工硬化 退火软化 再结晶 快冷 

分 类 号：TG142.71[一般工业技术—材料科学与工程] TG113.25[金属学及工艺—金属材料]