Research on high-temperature mechanical properties and microstructure features of a new type austenite heat-resistant stainless steel 305B

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• 作者：WANG MingtaoBAI Jingang
• 会议时间：2013-06-01
• 关键词：305B austenite stainless steel ; heat-resistant stainless steel ; high-temperature mechanical property ; thermo-calc ; microstructure
• 作者单位：Technology Center,Taigang Stainless Steel Co.,Ltd.,Taiyuan 030003,Shanxi,China
• 母体文献：第五届宝钢学术年会论文集
• 会议名称：第五届宝钢学术年会
• 会议地点：上海
• 主办单位：中国金属学会
• 语种：chi

摘要

A new kind of heat-resistant stainless steel 305B is studied on its mechanical properties under high temperatures in this paper.We also use the thermo-dynamic software THERMO-CALC to accomplish the calculation of phase diagram and predict the microstructure of the alloy.By comparing the simulated with real microstructure,it is found out that the results are almost the same.The microstructure under high temperatures has been analyzed by optical microscope and TEM,it shows that there is a small amount of ferrites between 500 - I OOOcC and it can be confirmed that a higher strength mainly comes from NbC precipitation.At last the mechanical properties of the alloy between 500 - 1 000℃ are studied.The results show that the tensile strength of 305B is higher than 304 and 310S;the yield strength of 305B is higher than 304 and nearly the same as 310S.Reduction of area of 305B is better than 310S and a little lower than 304.