9Ni钢埋弧自动焊接工艺试验研究

为了验证国产焊材与国产9Ni钢材在埋弧自动焊接工艺上的焊接适应性,选用12mm和20mm板厚的国产9Ni钢板、三种焊接参数(热输入量大、中、小)完成了9Ni钢埋弧自动焊横焊位置的焊接工艺试验,并通过焊接接头力学性能(包括:拉伸、弯曲、低温冲击、CTOD及DWTT)和显微组织验证、分析和整理不同焊接参数及板厚的焊接接头性能,获得国产焊材与国产9Ni钢材埋弧自动横焊焊接接头的性能试验报告,各项指标满足标准规范要求,验证了国产焊材与国产9Ni钢板的焊接适应性和匹配性。

Research and test of automatic submerged arc welding technology for 9%Ni steel

In order to verify the welding adaptability of domestic welding materials and 9Ni steel in automatic submerged arc welding technology,domestic 9Ni steel plates with thickness of 12 mm and 20 mm and three welding parameters (large,medium and small heat input) are selected to complete the welding technology tests of 9Ni steel in the horizontal position of automatic submerged arc welding. By verifying, analyzing and arranging the microstructures and mechanical properties (including tension,bending,low temperature impact, CTOD and DWTT) of welded joints with different welding parameters and plate thicknesses,the performance test report of automatic submerged arc horizontal position welded joints of domestic welding materials and 9Ni steel is obtained. Each index meets the requirements of standard specifications and verifies the welding adaptability and matching between domestic welding materials and 9Ni steel plate.