工程科学学报2016，Vol.38Issue(12)：1755-1761,7.DOI:10.13374/j.issn2095-9389.2016.12.014
经济型双相不锈钢2101中氮化物在基体中的平衡固溶度计算
Equilibrium solid solubility of nitrides in the matrix of lean duplex stainless steel 2101
摘要
Abstract
In order to improve the thermoplasticity of lean duplex stainless steel,the precipitation law and mechanism of lean duplex stainless steel 2101 (LDX2101) and duplex stainless steel 2205 (DSS2205) were studied in hot rolling.It is found that LDX2101 is susceptible to nitride precipitation at phase boundaries compared with DSS2205,which causes microcracks and results in the thermoplasticity of specimens worsen.According to relevant thermodynamic data,the equilibrium solid solubility formulas of Cr2 N precipitation in LDX2101 and DSS2205 were deduced,and total solid solution temperatures of Cr2 N precipitation were calculated through Thermo-Calc software and experimental data.Meanwhile,the Wagner interaction coefficient was introduced to consider the influence of Ni,Mn,Mo and Si on the equilibrium solid solubility product formula.The results show that the total solid solution temperature of Cr2N precipitation in LDX2101 is around 100 ℃ higher than that in DSS2205.The calculation results and experimental results are in good agreement.The finishing hot rolling temperature must be above the total solid solution temperature in the practical production process to prevent Cr2 N precipitation.Otherwise,the nitride precipitation is prone to produce at phase boundaries,which influences the thermoplasticity of the materials.关键词
双相不锈钢/热塑性/析出物/固溶温度Key words
duplex stainless steel/thermoplasticity/precipitates/solid solution temperature分类
矿业与冶金引用本文复制引用
冯志慧,李静媛,王一德..经济型双相不锈钢2101中氮化物在基体中的平衡固溶度计算[J].工程科学学报,2016,38(12):1755-1761,7.基金项目
国家自然科学基金资助项目(U1660114) （U1660114）
国家科技支撑计划资助项目(2015AA03A502) （2015AA03A502）
