1Cr18Ni9Ti冷拉钢丝的再结晶退火
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摘要
探索了再结晶退火加热温度和保温时间对?0.4 mm的1Cr18Ni9Ti冷拉钢丝力学性能的影响。将再结晶退火保温时间设置为6 min不变,再结晶退火加热温度在800～940℃范围内变化时,钢丝的抗拉强度随着加热温度升高逐渐下降,伸长率随着加热温度升高呈现先升高后下降趋势;将再结晶退火加热温度设置为860℃不变,再结晶退火保温时间在1～14 min范围内变化时,钢丝的抗拉强度随着保温时间延长逐渐下降,伸长率随着保温时间延长呈现下降趋势。1Cr18Ni9Ti冷拉钢丝采用不完全再结晶退火工艺时,通过"进炉计时"替代常规的"到温计时"方式,能够获得相对稳定的力学性能。
Effects of different recrystallization annealing temperature and holding time on mechanical properties of 1Cr18Ni9Ti cold-drawn steel wire with ?0.4 mm were investigated.When the holding time of recrystallization annealing is set to 6 min and the heating temperature of recrystallization annealing varies in the range of 800-940 ℃,the tensile strength of steel wire decreases gradually with the increase of heating temperature,and the elongation increases first and then decreases with the increase of heating temperature; when the heating temperature of recrystallization annealing is set to 860 ℃ and the holding time of recrystallization annealing varies in the range of 1-14 min,the tensile strength of steel wire decreases gradually with the prolongation of holding time,and the elongation decreases with the prolongation of holding time.When the incomplete recrystallization annealing process is adopted for 1Cr18Ni9Ti cold-drawn steel wire,the relatively stable mechanical properties can be obtained by replacing the conventional "start timing when the set temperature is reached" method with "start timing after parts enter the furnace" method.
Effects of different recrystallization annealing temperature and holding time on mechanical properties of 1Cr18Ni9Ti cold-drawn steel wire with ?0.4 mm were investigated.When the holding time of recrystallization annealing is set to 6 min and the heating temperature of recrystallization annealing varies in the range of 800-940 ℃,the tensile strength of steel wire decreases gradually with the increase of heating temperature,and the elongation increases first and then decreases with the increase of heating temperature; when the heating temperature of recrystallization annealing is set to 860 ℃ and the holding time of recrystallization annealing varies in the range of 1-14 min,the tensile strength of steel wire decreases gradually with the prolongation of holding time,and the elongation decreases with the prolongation of holding time.When the incomplete recrystallization annealing process is adopted for 1Cr18Ni9Ti cold-drawn steel wire,the relatively stable mechanical properties can be obtained by replacing the conventional "start timing when the set temperature is reached" method with "start timing after parts enter the furnace" method.
引文
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[2]孙佳佳.奥氏体不锈钢热处理工艺及其应注意的若干问题[J].科技资讯,2011,35(9):91.
[3]杨扬,王君良.晶界特征分布对1Cr18Ni 9Ti奥氏体不锈钢绝热剪切带自组织的影响[J].矿冶工程,2018,38(4):130-133.Yang Yang,Wang Junliang.Effect of grain boundary character distribution on the self-organization of adiabatic shear bands in1Cr18Ni9Ti austenitic stainless steel[J].Mining and Metallurgical Engineering,2018,38(4):130-133.
[4]杨哲,傅文.退火工艺对建筑用5052+Er合金组织与性能的影响[J].金属热处理,2016,41(10):183-187.Yang Zhe,Fu Wen.Effect of annealing process on microstructure and properties of 5052 alloy for architectural[J].Heat Treatment of Metals,2016,41(10):183-187.
[5]王泾文.1Cr18Ni9Ti奥氏体不锈钢冷变形与再结晶组织及性能[J].热加工工艺,2007,36(2):26-29.Wang Jingwen.Structure and properties of cold-deformed and recrystallized 1Cr18Ni9Ti austenitic stainless steel[J].Hot Working Technology,2007,32(2):26-29.
[6]强士坤,罗秀芳,宗明明,等.退火处理对冷拉钢丝力学特性的影响[J].金属制品,2011,37(3):33-37.Qiang Shikun,Luo Xiufang,Zong Mingming,et al.Effect of annealing on mechanical properties of cold drawing wire[J].Metal Products,2011,37(3):33-37.
[7]王敏,郭鸿镇.大块料1Cr18Ni9Ti奥氏体不锈钢的晶粒细化研究[J].热加工工艺,2008,37(20):24-26.Wang Min,Guo Hongzhen.Study on fine-grained of bulk 1Cr18Ni9Ti austenitic stainless steel[J].Hot Working Technology,2008,37(20):24-26.
[8]汪红晓.热处理工艺对1Cr18Ni9Ti冷轧带钢晶间腐蚀敏感性的影响[J].四川冶金,2002,24(6):32-34.