热轧工艺对S32101经济型双相不锈钢低温冲击韧性的影响  

of S32101 Lean Duplex Stainless Steel

作　　者：梁祥祥 韩培德[1] 李国平[2,3] LIANG Xiangxiang;HAN Peide;LI Guoping(College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;State Key Laboratory of Advanced Stainless Steel Materials,Taiyuan Iron&Steel(Group)Co.,Ltd,Taiyuan 030003,China;Technology Center,Shanxi Taiyuan Stainless Steel Co.,Ltd.,Taiyuan 030003,China)

机构地区：[1]太原理工大学材料科学与工程学院,山西太原030024 [2]太原钢铁(集团)有限公司先进不锈钢材料国家重点实验室,山西太原030003 [3]山西太钢不锈钢股份有限公司技术中心,山西太原030003

出　　处：《热加工工艺》2024年第17期118-121,126,共5页Hot Working Technology

摘　　要：为研究热轧工艺对S32101经济型双相不锈钢低温冲击韧性的影响,设计不同的展宽系数(1.0、1.1、1.4)和压下率(75%、90%)进行热轧试验。在计算热力学相图并分析不同温度组织转变规律的基础上,选择合理的固溶处理工艺,研究热轧工艺对固溶处理后S32101双相不锈钢低温冲击韧性的影响。结果表明:不同热轧工艺下,S32101双相不锈钢低温冲击韧性随展宽系数和压下率的增加而提高;随固溶处理温度的升高和保温时间的延长而降低。随展宽系数和压下率的增加,奥氏体和铁素体条带间距减小并沿轧向分布。减小两相条带间距,提高奥氏体相比例可提高低温冲击韧性。In order to study the effect of hot rolling process on the low temperature impact toughness of S32101 lean duplex stainless steel(LDX),hot rolling tests were carried out with different broadening coefficients of 1.0,1.1,1.4 and reduction rates of 75%and 90%.Based on calculation of thermodynamic phase diagram and microstructure evolution analysis at different temperatures,reasonable solution heat treatment was selected,and the effect of hot rolling process on the low temperature impact toughness of S32101 duplex stainless steel after solution treatment was studied.The results show that the low temperature impact toughness of S32101 duplex stainless steel increases with the increase of broadening coefficient and reduction rate,decreases with the increase of solution treatment temperature and holding time.With the increase of broadening coefficient and reduction rate,the strip spacing between austenite and ferrite structure decreases,they are distributed along the rolling direction.Reducing the spacing between the two phases and increasing the proportion of austenite phase can improve the low temperature impact toughness.

关 键 词：双相不锈钢 热轧 固溶处理 冲击韧性 

分 类 号：TG156.93[金属学及工艺—热处理] TG337.5[金属学及工艺—金属学]