SA508-3钢端淬试验的数值模拟及验证  

Numerical simulation and experimental verification of Jominy test for SA508-3 steel

作　　者：徐大成 卜恒勇 郑善举 李萌蘖 Xu Dacheng;Bo Hengyong;Zheng Shanjü;Li Mengnie(Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming Yunnan 650093,China)

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093

出　　处：《金属热处理》2020年第12期231-237,共7页Heat Treatment of Metals

基　　金：国家重点研发计划(2017YFB0701804)。

摘　　要：采用数值模拟与端淬试验研究了连续冷却对SA508-3钢组织演变的影响。利用有限元软件ABAQUS的FLIM和UMATHT子程序建立了SA508-3钢端淬过程中温度场和组织场的预测模型,并用所建立模型对其端淬过程进行了模拟。最后利用端淬试验不同位置处的微观组织观察对模拟结果进行了验证,发现在端淬结束后试样中没有珠光体产生,随着离淬火端距离的增加,试样中的微观结构从马氏体(M)到贝氏体(B)和残留奥氏体不断变化,半马氏体区出现在距淬火端9 mm的位置。试验结果和预测结果吻合较好。Influence of continuous cooling on microstructure evolution of SA508-3 steel was studied by numerical simulation and Jominy test.The models for predicting the temperature field and the microstructure field in the SA508-3 steel during the Jominy test were established by using the FLIM and UMATHT subroutine of finite element ABAQUS software,and used to simulate the end quenching process.And finally,the simulation was verified by microstructure observation at different positions on the basis of Jominy test.The results show that no pearlite is produced in the specimens after the end quenching test.With the increase of distance from the quenching end,the microstructure in the specimen changes from martensite(M)to bainite(B)and retained austenite,and the semi-martensitic region appears at 9 mm from the quenching end.The test results are in good agreement with the predicted results.

关 键 词：端淬试验 数值模拟 温度场 组织场 

分 类 号：TG156[金属学及工艺—热处理]