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纸质出版日期： 2024-06-25 ，
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张建林，吴小锋，李海，等.铸造低合金钢回火焊道与焊后热处理焊接接头性能对比研究［J］.电焊机，2024，54（6）：113-119.
ZHANG Jianlin, WU Xiaofeng, LI Hai, et al.Comparison of Properties between Annealed Low Alloy Steel Backhand Bead and Post-weld Heat Treated Welded Joints[J].Electric Welding Machine, 2024, 54(6): 113-119.
为评估回火焊道工艺在铸造低合金钢焊接中的应用效果，研究回火焊道工艺能否替代传统的焊后热处理工艺。采用焊条电弧焊（SMAW），选用R307、R407焊条分别对A217 WC6和A217 WC9进行焊接。控制预热温度、电流、电压、搭接率和层厚，以实现回火焊道工艺。焊后对接头进行金相、硬度、拉伸、冲击和侧弯试验。试验结果表明，A217 WC6焊接接头在焊态和热处理态下的性能均满足标准要求，而A217 WC9焊接接头在焊态下的冲击功小于母材，侧弯试样在熔合线附近出现表面裂纹，且硬度明显高于热处理态。 分析表明，回火焊道工艺能有效改善A217 WC6钢焊接接头的组织和性能，可替代焊后热处理。但在A217 WC9钢的焊接中，回火焊道工艺未能达到改善组织和性能的目的，焊接接头性能不满足标准要求，不能替代传统的焊后热处理工艺。
In this paper
to evaluate the application effect of temper bead welding technology in the welding of cast low alloy steels and to investigate whether it can replace the traditional post-weld heat treatment process
manual shielded metal arc welding (SMAW) was employed using R307 and R407 welding rods to weld A217 WC6 and A217 WC9
respectively. The preheating temperature
current
voltage
lap rate
and layer thickness were controlled to achieve the temper bead welding process. After welding
the joints were subjected to metallographic
hardness
tensile
impact
and bending tests. The test results show that the A217 WC6 welded joint met the standard requirements in both the as-welded and heat-treated conditions. However
the A217 WC9 welded joint had an impact energy less than that of the parent material in the as-welded state
and surface cracks appeared near the fusion line in the full-wall thickness bending samples
with a hardness significantly higher than that in the heat-treated state. The analysis concludes that the temper bead welding process can effectively improve the microstructure and performance of A217 WC6 steel welded joints and can replace post-weld heat treatment. However
in the welding of A217 WC9 steel
the temper bead welding process failed to achieve the purpose of improving the microstructure and performance
and the performance of the welded joint did not meet the standard requirements
thus it cannot replace the traditional post-weld heat treatment process.
铸造低合金钢回火焊道焊接工艺评定焊后热处理
casting low alloy steeltemper bead weldingwelding procedure specificationsheat treatment
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