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强制冷却对电渣焊接头温度场影响的数值模拟

孙加民, 何静, 邓德安

孙加民, 何静, 邓德安. 强制冷却对电渣焊接头温度场影响的数值模拟[J]. 焊接学报, 2016, 37(1): 63-66.
引用本文: 孙加民, 何静, 邓德安. 强制冷却对电渣焊接头温度场影响的数值模拟[J]. 焊接学报, 2016, 37(1): 63-66.
shu
SUN Jiamin, HE Jing, DENG Dean. Numerical simulation of welding temperature field of electro slag welding with forced cooling[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(1): 63-66.
Citation: SUN Jiamin, HE Jing, DENG Dean. Numerical simulation of welding temperature field of electro slag welding with forced cooling[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(1): 63-66.
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强制冷却对电渣焊接头温度场影响的数值模拟

  • 重庆大学 材料科学与工程学院, 重庆 400044

基金项目: 国家自然科学基金资助项目(51275544)

Numerical simulation of welding temperature field of electro slag welding with forced cooling

  • School of Material Science and Engineering, Chongqing University, Chongqing 400044, China

摘要

    摘要
  • 摘要: 为了研究强制冷却对箱型柱中腹板与隔板处电渣焊接头的热影响区宽度、高温停留时间和Δt8/5时间的影响,以MSC.Marc软件为平台,开发了用于电渣焊接头温度场计算的有限元方法. 在该有限元模型中,采用半椭球等密度移动热源模型和实测得到的低合金高强度钢SM490A材料的高温热物理性能参数,计算了电渣焊接头在空冷、铜冷和水冷等3种冷却条件下的温度场. 同时,采用试验方法实测了空冷条件下电渣焊接头典型位置的热循环曲线. 结果表明,计算得到的热循环曲线与实测结果十分吻合,验证了所开发的数值计算方法的妥当性. 通过对比3种冷却条件下的计算结果发现,电渣焊接头在铜冷和水冷条件下, 热影响区的宽度较空冷条件下明显减小,高温停留时间大幅短缩,同时Δt8/5时间也显著缩短了.
    Abstract: In order to clarify the influence of forced cooling on the width of heat affected zone(HAZ) and Δt8/5 of electro slag welding(ESW),a computational approach based on MSC.Marc software was developed to predict the welding temperature field. In the proposed approach, welding temperature field induced by ESW under varying cooling conditions (air, copper and water cooling) were computed by using a half ellipsoid volumetric heat source model with uniform density and the temperature-dependent thermo-physical properties of SM490A was obtained from experiment. In addition, the thermal cycles at several typical locations were measured in the ESW joint by K-type thermo-couple. The results show that the temperature histories predicted by numerical simulation are in good agreement with experimental results. The numerical results indicate that forced cooling has a limited influence on the size of fusion zone, however, copper cooling and water cooling can significantly reduce the width of HAZ and largely shorten Δt8/5 time.
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    • 参考文献(10)
  • [1] Deng D A, Shoichi K. Numerical simulation of welding temperature field, residual stress and deformation induced by electro slag welding[J]. Computational Materials Science, 2012, 62(9): 23-34.
    [2] Chen C C, Liang Y C. The effects of electro slag welding on material properties of box column plates[J]. International Steel Structures, 2011, 11(2): 171-189.
    [3] 孙加民, 蔡建鹏, 叶延洪, 等. 电渣焊接头的温度场数值模拟[J]. 焊接学报, 2015, 36(7): 93-96. Sun Jiamin, Cai Jianpeng, Ye Yanhong, et al. Numerical simulation of welding temperature field induced by electro slag welding[J]. Transactions of the China Welding Institution, 2015, 36(7): 93-96.
    [4] 朱政强, 陈立功, 饶德林, 等. 振动调制工艺在高炉用钢电渣焊中的应用[J]. 焊接学报, 2005, 26(2): 73-76. Zhu Zhengqiang, Chen Ligong, Rao Delin, et al. Experimental study on eleetro slag weld of blast furnace steel using vibratory condition technology[J]. Transactions of the China Welding Institution, 2005, 26(2): 73-76.
    [5] Kitani Y, Ikeda R, Ono M, et al. Improve of welding metal toughness in high input electro slag welding of low carbon steel[J]. Welding in the world, 2009, 53(2): 63-66.
    [6] Kojima A, Yoshii K, Hada T, et al. Development of high HAZ toughness steel plates for box columns with high input welding[J]. Nippon Steel Technical Report, 2004, 38(2): 33-37.
    [7] Deng D A, Sun J M, Dai D P, et al. Influence of accelerated cooling condition on welding thermal cycle, residual stress, and deformation in SM490A steel ESW joint[J]. Journal of Materials Engineering and Performance, 2015, 24 (9): 3487-3501.
    [8] Marc Software Corporation. MSC. marc introductory course[M]. USA: Arcadia Publication, 2005.
    [9] 叶延洪, 孙加民, 蔡建鹏, 等. 焊缝屈服强度对SM490A钢焊缝残余应力预测精度的影响[J]. 焊接学报, 2015, 36(7): 17-20. Ye Yanhong, Sun Jiamin, Cai Jianpeng, et al. Influence of yield strength of weld metal on prediction accuracy of welding residual stress in SM490A steel joint[J]. Transactions of the China Welding Institution, 2015, 36(7): 17-20.
    [10] Hayato S. Construction of heat treatment database and enhancement of simulation technique[J]. Technical Paper, 2005, 155(51): 1-9.
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  • 收稿日期:  2014-03-27

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