| 摘要: |
| 为了得到珠光体耐热钢12Cr1MoV合理的钢管焊接热输入,准确预测焊接热影响区宽度,能够提供典型位置的热循环曲线,掌握和预测焊后热影响区及附近区域组织转变规律,采用ANSYS有限元软件对钢管焊接过程进行数值模拟,并将模拟结果与试验数据进行比较.结果表明,采集特征点热循环曲线与模拟结果非常吻合;焊接热影响区宽度模拟值与实测值基本一致;焊缝区以针状铁素体为主,热影响区主要是先共析铁素体和伪共析索氏体,过热区有少量铁素体和粒状贝氏体. |
| 关键词: 12Cr1MoV钢 数值模拟 温度场 组织 |
| DOI： |
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| 基金项目:重庆高校优秀成果转化重大资助项目(KJZH11215);重庆理工大学科研启动基金资助项目(2012ZD47) |
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| Numerical simulation and test verification of welding temperature field of 12Cr1MoV heat-resistant steel pipe |
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CHI Luxin, SUN Zhaofan, WU Guangfeng
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College of Materials Science and Engineering, Chongqing University of Technology, Chongqing 400050, China
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| Abstract: |
| To obtain reasonable welding heat input and accurately predict heat affected zone width of 12Cr1 MoV heat-resistant steel pipe for controlling boiler welding quality, the thermal circling curves of typical position on steel pipe was obtained by numerical simulation with ANSYS software based on different welding process parameters. Compared the simulation results and the experimental results, it was found that the values calculated of thermal circling curves were close to the ones measured by infrared thermometer. Moverover, the simulation width of welding heat-affected zone was basically the same as the measured value.Welded joint microstructure is mainly acicular ferrite, and heat affected zone microstructure is mainly proeutectoid ferrite and quasi-eutectoid sorbite, while overheated zone have a small amount of ferrite and granular bainite. |
| Key words: 12Cr1MoV steel numerical simulation temperature field microstructure |
