Rare earth solid welding wire with excellent low-temperature impact toughness

Abstract

The invention discloses a rare earth solid welding wire with excellent low-temperature impact toughness. The rare earth solid welding wire comprises the following chemical components including, by mass, 0.06 to 0.10 percent of C, 1.40 to 1.55 percent of Mn, 0.80 to 0.95 percent of Si, 0.10 to 0.20 percent of Cr, 0.05 to 0.12 percent of Ti, 5 to 30 ppm of a rare earth element Ce and the balance Fe and inevitable impurities, wherein P in the impurities is less than or equal to 0.025 percent, and S in the impurities is less than or equal to 0.025 percent. The invention is suitable for 600 Mpa-level solid welding wires, the rare earth element Ce is transited into welding seams, and the welding seams have more excellent low-temperature-resistant impact toughness on the basis of high strength through the effects of refining welding seam grains, improving welding seam structures and purifying welding seam metal microalloying treatment.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a rare earth solid welding wire with excellent low-temperature impact toughness. Background technique [0002] 600MPa welding wire is a commonly used high-strength welding wire, but when welding, the low-temperature impact toughness of the weld is low, which has always been a bottleneck restricting its wide use. Contents of the invention [0003] In order to solve the above technical problems, the object of the present invention is to provide a rare earth solid welding wire with excellent low temperature impact toughness. [0004] In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions: [0005] A rare earth solid welding wire with excellent low-temperature impact toughness, the chemical composition of which is: C0.06-0.10%, Mn1.40-1.55%, Si0.80-0.95%, Cr0.10-0.20%, Ti0.05 -0.12%, rare earth element...

AI Technical Summary

Problems solved by technology

[0002] 600MPa welding wire is a commonly used high-strength welding wire, but when welding, the low-temperature impact toughness of the weld is low, which has always been the bottleneck restricting its wide use

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