中厚板冷热多丝埋弧焊接热循环参数测量
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上海振华重工(集团)股份有限公司

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Measurement of thermal cycle parameters for hot and cold multi-wire submerged arc welding of medium thick plates
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Shanghai Zhenhua Heavy Industry (Group) Co., Ltd., Shanghai

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    摘要:

    为了解决中厚板高强钢埋弧焊接热影响区的热循环参数准确测量难题,自主研制了一套多通道热电偶测温软/硬件系统,测量并比较不同焊丝组合(单丝及冷热多丝)对应的焊接热影响区的热循环主要参数。分析结果表明:一方面与传统单丝埋弧焊接工艺相比,冷热多丝复合埋弧焊接工艺可以解决埋弧焊大线能量导致的热影响区脆化问题,从而提高焊缝组织性能和焊接质量;另一方面还可为中厚板焊接过程中的温度场数值模拟计算分析提供了实测数据,为中厚板焊接过程中各种工艺参数制定与优化、焊缝和热影响区的组织性能改善提供了必要的理论基础,对于确保中厚板埋弧焊接过程中的质量也具有十分重要的意义。

    Abstract:

    In order to solve the problem of accurate measurement of thermal cycle parameters of heat-affected zone (HAZ) in submerged arc welding of medium thick plate and high strength steel, a set of multi-channel thermocouple temperature measuring software/hardware system was developed independently in this paper to measure and compare the main thermal cycle parameters of HAZ corresponding to different welding wire combinations (monofilament and cold/hot multi-wire). The analysis results show that, on the one hand, compared with the traditional monofilament submerged arc welding process, the cold and hot multi-wire composite submerged arc welding process can solve the heat-affected zone embrittlement problem caused by the large line energy of submerged arc welding, thus improving the weld microstructure and welding quality. On the other hand, it can also provide the numerical simulation of the temperature field in the welding process of the plate to provide the measured data for the development and optimization of various process parameters in the welding process of the plate, and the weld and heat-affected zone to improve the organizational properties of the necessary theoretical basis for ensuring the quality of the submerged arc welding process of the plate is also of great importance.

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  • 收稿日期:2021-07-02
  • 最后修改日期:2021-08-06
  • 录用日期:2021-08-11
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