基于ANSYS的D406A钢局部焊后热处理温度场计算机仿真研究  

Study on Temperature Field Computer Simulation During Local PWHT Process for D406A Steel Based on ANSYS

作　　者：王力群[1] 段谟意[1] 

机构地区：[1]南京铁道职业技术学院,江苏南京210031

出　　处：《热加工工艺》2016年第21期227-229,232,共4页Hot Working Technology

基　　金：全国教育科学规划教育部重点课题(DJA110199)

摘　　要：基于ANSYS大型有限元分析软件,建立了适合D406A钢圆筒构件焊后热处理有限元模型,对焊后热处理温度场进行了模拟,分析了加热过程中不同时间段焊接接头附近温度场分布情况,研究了加热宽度对相变区宽度的影响。结果表明,焊后热处理过程中,随着加热时间增加,高温区域扩大,轴向温度分布逐渐均匀,最高温度在焊缝区域,随着离焊缝中心距离增加温度逐渐降低;随着加热宽度的增加,焊缝中心最高温度明显提高,相变点以上温度区域宽度逐渐扩大,当加热宽度由10 mm提高至15 mm时增幅较大,继续增加宽度时增幅逐渐减小。Based on the ANSYS finite element software, a suitable finite element model of PWHT was established andthe PWHT temperature field for D406A steel cylinder component was simulated. The temperature distribution at heating stageduring PWHT was analyzed, and the effect of heating width on the transformation zone size was investigated. The resultsshow that, during the PWHT process, with the increase of heating time, the high temperature zone expands, the axialtemperature distribution homogenizes gradually, the highest temperature exists at the weld zone, and the temperaturedecreases with the increase of the distance from the weld center. With the increase of heating width, the highest temperature atthe weld center is improved obviously, the width of the zone where the temperature is above the transformation point increasesgradually, and the increase is significant when the heating width varies from 10mm to 15ram, while the increase reduces as theheating width is further expanded.

关 键 词：计算机仿真 D406A钢 焊后热处理 温度场 

分 类 号：TG441.8[金属学及工艺—焊接]