Weather resisting gas shielded welding wire for bogie of high-speed train

Abstract

The invention belongs to the field of welding materials and particularly relates to a weather resisting gas shielded welding wire for a bogie of a high-speed train, in particular to a weather resisting gas shielded welding wire for a bogie special for welding a bogie architecture of a CRH3 (China Railway High-speed 3) motor train unit. The weather resisting gas shielded welding wire is suitable for welding low-alloy high-strength steel such as the bogie architecture of the motor train unit and the like; and according to the weather resisting gas shielded welding wire, in the prior art, the problems that the weather resisting gas shielded welding wire for the bogie of the high-speed train always depends on the import, has high cost and the like are solved. The weather resisting gas shielded welding wire comprises the following basic chemical components in percentage by weight: 0.02-0.08 percent of C, 0.80-1.20 percent of Mn, 0.20-0.60 percent of Si, 0.60-1.00 percent of Ni, 0.20-0.50 percent of Cu, not more than 0.20 percent of Cr, not less than 0.02 percent but not more than 0.08 percent of Ti, not more than 0.008 percent of S, not more than 0.012 percent of P and the balance of iron and inevitable impurities. The weld metal of the weather resisting gas shielded welding wire which is disclosed by the invention has yield strength delta 0.2 of being not less than 420MPa, tensile strength delta b being 500-640MPa, elongation percentage A being not less than 24 percent, and the standard import work AKv being not less than 27J at -40DEG C.

Description

technical field [0001] The invention belongs to the field of welding materials, specifically a weather-resistant gas-shielded welding wire for high-speed train bogies, which is suitable for welding low-alloy high-strength steels such as the bogie frames of EMUs, especially a kind of welding wire specially used for the steering frames of CRH3 EMUs. Weatherproof gas shielded welding wire for frame welding. Background technique [0002] In recent years, in order to meet the growing needs of rapid railway passenger transport services in China, the railway EMU with a speed of 300-350 kilometers per hour has been developed rapidly. The bogie is an important part supporting the railway rolling stock and one of the core components of the rail train. The frame is the bogie The main body of the railway, the development of high-speed railways, has put forward lightweight requirements for bogies. The welding structure frame can choose appropriate materials according to needs, reduce the...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a weather-resistant gas-shielded welding wire for high-speed train bogies, to solve the problems in the prior art that the weather-resistant gas-shielded welding wire for high-speed train bogies has always been dependent on imports, and the cost is high

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