摘要
利用扫描电镜(SEM)、透射电镜(TEM)及万能拉伸试验机等研究了卷取温度对12Cr1MoV耐热钢热轧组织演变和力学性能的影响。结果表明:随着卷取温度的升高,试验钢的抗拉强度和屈服强度均降低,断后伸长率提高;只有在660℃卷取时,试验钢应力-应变曲线呈现连续屈服,其他卷取温度下,均出现了屈服平台;710℃卷取时,12Cr1MoV耐热钢具有最优的综合力学性能,其抗拉强度为689 MPa,屈服强度为597 MPa,断后伸长率为17%。试验钢的强韧化是由细晶强化、相变强化和析出强化等多种强化机制综合作用的结果;只有合适的卷取温度,才能同时发挥出相变强化和析出强化的作用,最终使试验钢获得优异的综合力学性能。
Effect of coiling temperature on hot-rolled microstructure evolution and mechanical properties of 12Cr1MoV heat-resistant steel was studied by means of scanning electron microscopy(SEM),transmission electron microscopy(TEM)and universal tensile testing machine.The results show that with the increase of coiling temperature,the tensile strength and yield strength of the experimental steel decrease,while the elongation increases.Only when coiling happens at 660℃,the stress-strain curve of the experimental steel shows continuous yielding,while yield plateau appears at other coiling temperatures.When coiling is carried out at 710℃,the 12Cr1MoV heatresistant steel has the best comprehensive mechanical properties,with the tensile strength of 689 MPa,the yield strength of 597 MPa and the elongation of 17%.The strengthening and toughening of the experimental steel is the result of a comprehensive effect of various strengthening mechanisms such as fine grain strengthening,phase transformation strengthening and precipitation strengthening.Only an appropriate coiling temperature can simultaneously exert the effects of phase transformation strengthening and precipitation strengthening,ultimately achieving excellent comprehensive mechanical properties of the experimental steel.
作者
王鑫
王尊呈
艾铖珅
马良
崔丕林
庞启航
李文竹
WANG Xin;WANG Zun-cheng;AI Cheng-shen;MA Liang;CUI Pi-lin;PANG Qi-hang;LI Wen-zhu(Hot Rolling Mill of Angang Steel Company Limited,Anshan 114000,China;Iron and Steel Research Institute of Angang steel Group,Anshan 114000,China;School of Material and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,China)
出处
《材料热处理学报》
CAS
CSCD
北大核心
2023年第9期106-113,共8页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(52004122)。
关键词
耐热钢
卷取温度
显微组织
强化机理
heat-resistant steel
coiling temperature
microstructure
strengthening mechanism
