【作者】 高彩茹； 朱成林； 杜林秀； 杨雄飞；

【Author】 Gao Cairu;Zhu Chenglin;Du Linxiu;Yang Xiongfei;The State Key Lab of Rolling Technology and Automation, Northeastern University;Pan gang Group Research Institute Co, Ltd;

【机构】 东北大学轧制技术及连轧自动化国家重点实验室； 攀枝花钢铁研究院总公司；

【摘要】 以不同Mo含量的4种成分V微合金钢为实验钢,通过等温析出热模拟实验、TEM实验、HRTEM等实验手段,研究了Mo元素对V微合金钢中低温贝氏体区析出行为的影响规律;通过实验钢的实验室试轧及力学性能检测,研究了Mo对V微合金钢力学性能的影响。结果表明:Mo元素的添加可以显著提高析出物的析出潜能,对于轧后600℃×40min保温试样,Mo含量从0增至0.6%,析出体积分数可由0.019%增加到0.025%;Mo元素的添加增大析出相的晶格常数,使析出相与基体之间的错配度从2.5%增加到3.3%;在V微合金钢中添加Mo元素能够显著提高实验钢的强度,添加0.6%的Mo元素的实验钢屈服强度达667MPa,抗拉强度达803MPa,比不含Mo的实验钢分别提高了113MPa和119MPa。更多还原

【Abstract】 The effects of Mo element on the precipitation of low temperature bainite zone in V microalloyed steels were investigated for the four V microalloyed steels with different Mo contents, by means of isothermal precipitation simulations, TEM, HRTEM and so on. And the effect of Mo element on the mechanical properties of V microalloyed steel was investigated by hot rolling experiment and mechanical properties test in laboratory. The results show that the addition of Mo can significantly improve the precipitation potential, When the Mo content increases from 0% to 0.6% at 600℃ for 40 min, the volume fraction of precipitates can be increased from 0.019 % to 0.025%. The addition of the Mo element increases the lattice constant of the precipitates, and increases the mismatch degree between the precipitates with the matrix from 2.5% to 3.3%. The addition of Mo element can significantly improve the strength of the V microalloyed steel. The yield strength of the steel with 0.6% Mo element is 667 MPa and the tensile strength is 803 MPa, which is increased 119 MPa and 113 MPa than that of the steel without Mo content.更多还原