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703埋弧焊丝是耐海水腐蚀用钢的焊接材料。该焊丝与250G熔炼焊剂配用时,焊接电弧稳定,成形、脱渣等焊接工艺性良好,具有强的抗焊接裂纹能力。焊缝强度高,低温冲击韧性优良。各项性能指标已达到国家船检局81年制订的钢质海船建造规范中对Ⅲ级埋弧焊材料Ⅲ47M的有关规定,在强度和低温韧性上还有一定的富裕量。焊缝还具有良好的耐海洋大气和飞溅带海水腐蚀性能,可与Cr-Cu-Si型耐海水腐蚀用钢相当。该焊丝适用于高强度低合金船用D级钢的焊接,可作为港口和各种近海工程结构的埋弧焊接材料。
703 submerged arc welding wire is seawater corrosion resistant steel welding materials. When used with 250G flux, the welding wire is stable in welding arc, has good welding processability such as forming and slag removing, and has strong ability of resistance to welding crack. High weld strength, low temperature impact toughness. Various performance indexes have reached the relevant regulations of Ⅲ-level submerged arc welding material Ⅲ47M in the Code for Construction of Steel Sea-going Boats formulated by the State Ship Inspection Bureau in 1981, and there is a certain amount of margin in strength and low-temperature toughness. Weld also has good resistance to marine atmosphere and splash seawater corrosion performance, with Cr-Cu-Si type seawater corrosion resistant steel quite. The welding wire is suitable for welding Class D steels with high strength and low alloy, and can be used as a submerged arc welding material for ports and various offshore structures.