9Cr3W3Co耐热钢锻造工艺数值模拟及实验研究  

Numerical simulation and experimental study on forging process of 9Cr3W3Co heat-resistant steel

作　　者：王云海 龚志华[1,2] 赵吉庆[2] 杨钢[2] 陈正宗[2] WANG Yun-hai;GONG Zhi-hua;ZHAO Ji-qing;YANG Gang;CHEN Zheng-zong(Institute of Materials&Metallurgy,Inner Mongolia University of Science&Technology,Baotou 014010,China;Special Steel Research Institute of General Iron and Steel Research Institute Co.,Ltd.,Beijing 100081,China)

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古包头014010 [2]钢铁研究总院有限公司特殊钢研究院,北京100081

出　　处：《塑性工程学报》2024年第10期17-26,共10页Journal of Plasticity Engineering

基　　金：国家重点研发计划项目(2021YFB3704100,2021YFB3704101);内蒙古自然科学基金资助项目(2022MS05039);内蒙古高等学校青年科技英才计划项目(NJYT23115);钢铁研究总院自主投入研发专项基金资助项目(21T62610B)。

摘　　要：通过Deform 3D模拟了9Cr3W3Co耐热钢连续多道次锻造工艺,分析了等效应力、等效应变场和温度场的分布规律。基于模拟结果,优化了锻造工艺,并通过Gleeble-3800热模拟试验机对9Cr3W3Co耐热钢进行不同变形参数多道次热压缩实验,分析了不同变形参数下的热变形行为,结合热模拟真应力-真应变曲线和显微组织,验证了模拟的准确性。结果表明,模拟后的优化锻造工艺为应变速率5 s^(-1),变形方式为先大变形后小变形,变形后的坯料心部温度分布均匀,为951~970℃,等效应变分布均匀,为2.15~2.19。当应变速率为5 s^(-1)时,动态再结晶晶粒尺寸随变形温度的升高而变大,采用先大压下量后小压下量的方式,可获得完全再结晶的等轴晶,平均晶粒尺寸为15μm,变形后组织均匀性更好。结合微观组织演变结果分析,模拟实验具有可行性,实验结果与模拟结果基本吻合。The distribution laws of equivalent stress,equivalent field equivalent strain field and temperature field of 9Cr3W3Co heat-resistant steel were analyzed by simulating the continuous multi-pass forging process with Deform 3D.Based on the simulation results,the forging process was optimized.The multi-pass hot compression tests of 9Cr3W3Co heat-resistant steel with different deformation parameters were carried out by Gleeble-3800 thermal simulator,and the thermal deformation behaviours with different deformation parameters were analyzed.The accuracy of the simulation was verified by combining with the thermal simulation true stress-true strain curves and microstructure.The results show that the optimized forging process after simulation is strain rate of 5 s^(-1),the deformation mode is large deformation followed by small deformation,the temperature distribution of the blank heart after deformation is uniform of 951-970℃,and the equivalent strain distribution is uniform of 2.15-2.19.When the strain rate is 5 s^(-1),the grain size of dynamic recrystallization increases with the increase of deformation temperature.By using the method of first large reduction and then small reduction,the fully recrystallized isometric crystals with an average grain size of 15μm can be obtained,and the organisation homogeneity after deformation is better.Combined with the analysis of microstructure evolution results,the simulation test is feasible,and the experimental results are basically consistent with the simulation results.

关 键 词：9Cr3W3Co耐热钢 锻造工艺 Deform 3D 连续多道次变形 动态再结晶 

分 类 号：TG142.7[一般工业技术—材料科学与工程]