摘要
对成分为0. 049%C、15.38%Cr、4.86%Ni、3.49%Cu、0.175%Si、0.760%Mn和0.173%Nb(质量分数),尺寸为40 mm×40 mm×400 mm的A705-630不锈钢试样进行了不同工艺的热处理:①1 040℃×1.5 h油冷固溶处理,固溶处理后480℃×3 h空冷时效处理;②固溶处理后时效处理前740～850℃保温2 h水冷调整处理。热处理后,检测了钢的显微组织和力学性能。结果表明:与仅经固溶和时效处理的A705-630钢相比,经固溶、时效和调整处理的钢马氏体板条较细小,位向关系较明显,强度和硬度下降,冲击韧度提高,且随着调整处理温度的提高,钢的强度、硬度提高,冲击韧度降低。
The specimens 40 mm by 40 mm by 400 mm long made of A705-630 stainless steel containing 0. 049% C ,15. 38% Cr, 4. 86% Ni, 3. 49% Cu, 0. 175% Si, 0. 76% Mn, and 0. 173% Nb by mass were subjected to ① solution treating at 1 040 ℃ for 1.5 h and oil cooling, followed by aging at 480 ℃ for 3 h and air cooling,②solution treating, and conditioning at 740 to 850 ℃ for 2 h and water cooling, followed by aging. After heat treating,the steel was tested for microstructure and mechanical property. The results indicated that the A705-630 steel subjected to solution treating, conditioning and aging exhibited finer martensitic lath, more obvious martensitic orientation, less strength and hardness, and higher impact toughness as compared with one subjected only to solution treating and aging. In addition, as conditioning temperature became higher, the steel gave higher strength and hardness but lower impact toughness.
作者
刘业超
陈炜
邵帅
翁吉铭
王全振
于晃
LIU Yechao;CHEN Wei;SHAO Shuai;WENG Jiming;WANG Quanzhen;YU Huang(Shenyang Blower Works Group Corporation,Shenyang 110869,Liaoning China)
出处
《热处理》
CAS
2019年第2期27-30,共4页
Heat Treatment
