Low-cost gas shielded welding wire for 60 kilogram grade steel

Abstract

The invention discloses a low-cost gas shielded welding wire for 60 kilogram grade steel. The welding wire comprises the following components by weight: 0.06-0.15% of C, 0.80-0.90% of Si, 1.85-2.10% of Mn, 0.1-0.3% of Cr, 0.08-0.10% of Ti, 0.01-0.06% of V, less than or equal to 0.015% of S, less than or equal to 0.015% of P and the balance of iron and inevitable impurities. The gas shielded welding wire has the following beneficial effects: the cost of the raw materials of the welding wire is greatly reduced, the strength of the welding line is improved, the welding process property is significantly improved, and the welding wire disclosed by the invention can be applicable to welding shielded by multiple gases; and when the welding wire is used for welding, the arc is stable, splash is small, pores are not formed, the shape is beautiful, the mechanical property of the welding line is good, and the welding requirements of the steel, with the tensile strength of more than or equal to 600Mpa, for engineering machinery, coal mine machinery, railroad bridges and buildings are met.

Description

technical field [0001] The invention relates to a welding material, in particular, a low-cost gas-shielded welding wire for 60 kg grade steel. Background technique [0002] Low-alloy high-strength steel is a steel with excellent low-temperature impact toughness and high strength. It has the advantages of reducing material consumption, reducing structural weight, and improving structural performance and safety. Therefore, it has been used in construction machinery, coal mining machinery, railway bridges and buildings. It is widely used in steel and other projects. The tensile strength of this kind of steel is about 600Mpa, which is called 60 kg steel. [0003] With the development of science and technology and the market, there are more and more varieties of high-strength welding wire for 60 kg grade on the market. In order to compete for the market, various manufacturers have adopted various methods to reduce the cost of welding wire, and the use of low-cost coils is one of...

AI Technical Summary

Problems solved by technology

However, the welding wire disclosed in the patent CN101239426A uses V and Nb to refine the grains, thereby achieving the purpose of increasing the strength, and because the mass ratio of these two elements in the disc element is too low, in the steelmaking process, its dispersion The welding wire is not well controlled, and it is easy to cause uneven welding wire composition, thereby causing the problem of unstable mechanical properties; and the welding wire disclosed in CN101020279A, because the proportion of its microalloying elements is not very reasonable, the welding wire can only be used under the protection of argon-rich gas. use