基于TMCP对套管钢30MnCr22的静态再结晶研究

Research on Static Recrystallization of Oil Casing Steel 30MnCr22 Based on TMCP

基于热机械控制工艺(TMCP),以经济型P110石油套管钢30MnCr22为研究对象,在Gleeble-1500D热模拟实验机上进行了双道次热压缩实验,测得其在不同变形条件下的真应力-真应变曲线,研究了其高温静态再结晶规律。结果表明,30MnCr22钢在热变形过程中随着变形温度的升高、道次间隙时间的延长、变形程度的加大和应变速率的加快,静态再结晶体积分数增加,更容易发生静态再结晶。采用Origin软件对各种变形条件下的真应力-真应变曲线进行了分析,采用线性回归方法建立了30MnCr22钢的静态再结晶动力学模型。结合30MnCr22钢静态再结晶规律,分析了TMCP条件下无缝钢管的再结晶控制策略。

Based on the thermo-mechanical control process(TMCP),taking the economical P110 petroleum casing steel 30MnCr22 as the research object,a double-pass thermal compression experiment was carried out on the Gleeble-1500D thermal simulation test machine,and the true stress-true strain curve under different deformation conditions was measured,and the high-temperature static recrystalstallization law was studied.The results show that with the increase of deformation temperature,times between double passes,strain and strain rate in the thermal deformation process,the volume fraction of static recrystallization of 30MnCr22 steel increases,which is more prone to static recrystallization.The true stress-strain curves under various deformation conditions were analyzed by Origin software,and the static recrystallization kinetic model of 30MnCr22 steel was established by linear regression method.The recrystallization control strategy of 30MnCr22 seamless steel pipe under TMCP condition was analyzed combined with the law of its static recrystallization.