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以EH36高强度船板钢为研究对象,通过拉伸、冲击和弯曲等试验手段,对EH36船板钢气电立焊的接头进行了力学性能测试。拉伸试验结果发现所有断裂均发生在拉伸试样的母材区,EH36船板钢在垂直气电立焊条件下,焊缝和焊接热影响区的强度好于母材,并没有出现热影响区软化现象;冲击试验发现,近表面焊接接头韧性最差区位于焊缝,该位置冲击功为107J,厚度中部冲击试验发现冲击功最低区也位于焊缝,只有85 J,这可能是由于存在部分夹渣引起。接头弯曲试样弯曲后,用肉眼检查试样弯曲部分外侧没有出现裂纹或起层等缺陷,弯曲试验均合格。
Taking EH36 high-strength ship steel as the research object, mechanical properties of the joints of EH36 steel-plate gas-electric vertical welding were tested by means of tensile test, impact test and bending test. Tensile test results showed that all the fractures occurred in the base material of the tensile specimen. The strength of the weld and weld HAZ was better than that of the parent material in EH36 shipbuilding steel under vertical gas-conductor welding conditions, and no heat The impact zone softening phenomenon; impact test found that near the surface of the worst toughness weld joints located in the weld, the location of the impact energy of 107J, the thickness of the central impact test found that the lowest impact energy is also located in the weld, only 85 J, which may be due to There is some slag caused. After bending the specimen bending specimen, the naked eye was examined with no cracks on the outer part of the specimen or from the layer and other defects. The bending tests were qualified.