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采用光镜、电镜、冲击和拉伸等试验方法，对气体保护焊“低强匹配”焊材焊制的ＨＱ１３０＋ＱＪ６３高强钢焊接接头的显微组织和力学性能进行了试验研究，并采用模拟焊接热循环的方法研究了不同峰值温度和冷却时间对ＨＱ１３０钢热影响区（ＨＡＺ）组织和冲击韧性的影响。试验结果表明，受焊接热循环影响，ＨＱ１３０钢ＨＡＺ存在回火软化区，该区域软化或失强最大的部位在峰值加热温度为Ａｃ１附近。在ＨＡＺ峰值温度Ａｃ１～Ａｃ３之间存在脆性区，冲击韧性明显降低。在焊接生产中应采用多层多道焊工艺并严格限制焊接线能量，以防止或减弱ＨＡＺ软化和脆化现象。
The microstructure and mechanical properties of HQ130 + QJ63 high-strength steel welded joints welded by gas-shielded welding “low-strength matching” welding consumables were studied by means of light microscope, electron microscope, impact and tensile test. The simulated welding heat The influence of different peak temperature and cooling time on the microstructure and impact toughness of heat-affected zone (HAZ) of HQ130 steel was studied. The experimental results show that there is tempering softening zone in the HAZ of HQ130 steel due to the thermal cycle of welding. The peak softening temperature or the maximum loss in the zone is near Ac1. In the HAZ peak temperature between Ac1 Ac3 brittle zone, impact toughness decreased significantly. In welding production should be multi-layer multi-pass welding process and strictly limit the welding line energy to prevent or reduce HAZ softening and embrittlement.