摘要
试验0.05C-14Mn-19Cr-0.7N钢经1t非真空感应炉冶炼,并重熔成电渣锭。在电渣锭中心取样,通过Gleeble 3800热模拟试验机对试验钢进行800~1 250℃,应变速率0.005~10 s^(-1)的高温拉伸试验,得出温度和应变速率对试验钢断面收缩率的影响,并观察了各温度拉伸后的组织。试验结果表明,随着温度从800℃升高至1250℃,试验钢抗拉强度从327 MPa下降到68 MPa,断面收缩率由22%升至55%;1 200℃时,应变速率从0.01 s^(-1)增加到10 s^(-1)时,试验钢的抗拉强度从43 MPa增加至109 MPa,断面收缩率从38%提高至71%。综合实验结果,高氮奥氏体不锈钢0.05C-14Mn-19Cr-0.7N最优的变形参数为:1 200~1 250℃,应变速率1~10 s^(-1)。
The tested steel 0. 05C-14Mn-19Cr-0. 7N is inched by 1 t non vacuum induction furnace and remelted to ESR ingot. By sampling at center of ESR ingot and using Glceble 3800 thermo-simulation testing machine the thermo tensile examination of tested steel at 800 - 1 250 ℃ with strain rate 0. 005 - 10 s-1 has been carried out to get the effect of temper- ature and strain rate on reduction of area of tested steel, and the structure of steel tensile-tested at each temperature is ob- served. Examination results show that with temperature increasing from 800 ℃ to 1 250 ℃ the tensile strength of tested steel decreases from 327 MPa to 68 MPa and the reduction of area of steel increases from 22% to 55% ; at 1 200℃ with strain rate increasing from 0. 01 s-1 to 10 s-1 the tensile strength of tested steel increases from 43 MPa to 109 MPa and the reduction of area of steel increases from 38% to 71%. Integrating the experimental results it is obtained that the optimized deformation parameters for high nitrogen austenite stainless steel 0.05C-14Mn-19Cr-0. 7N are rolling at 1 200 - 1 250℃ with stain rate 1 - 10 s^-1.
出处
《特殊钢》
北大核心
2018年第2期6-9,共4页
Special Steel
基金
河北省科技计划项目资助(15211007D)
