High strength anti-weather burial arc welding wire

Abstract

The high strength weather resisting submerged arc welding wire consists of: C 0.04-0.15 wt%, Mn 1.2-2.0 wt%, S not more than 0.030 wt%, P not more than 0.030 wt%, Cu 0.10-0.30 wt%, Cr 0.40-1.2 wt%, Ni 0.20-0.80 wt%, and Ti 0.03-0.10 wt%. The welding wire forms fused-on metal and welded joint with excellent atmospheric corrosion resistance and excellent comprehensive performance, including yield strength not lower than 450 MPa, tensile strength not lower than 550 MPa, elongation greater than 22 %, and especially low temperature impact toughness of Akv not lower than 60 J at the temperature of -40 deg c.

Description

technical field [0001] The invention belongs to the field of welding materials. Background technique [0002] Existing submerged arc welding wires such as the patent "High Toughness Welding Wire Suitable for Low Carbon Microalloyed Steel" proposed by Yanshan University disclosed in Chinese Patent Application No. 02119591.9. The chemical composition formula of welding wire is as follows: C: 0.01~0.12%, Si: 0.10~0.40%, Mn: 0.6~2.3%, Cr: 0.01~0.22%, Mo: 0.08~0.60%, V: 0.004~0.06%, Cu : 0.01-0.50%, Ni: 0.01-0.60%, Al: 0.01-0.06%, Nb: 0.02-0.08%, Ti: 0.01-0.20%, B: 0.0001-0.01%, Re: 0.001-0.5%. [0003] This welding wire has certain weather resistance characteristics and contains Cu, Cr, Ni alloy elements. At the same time, it uses a variety of alloying elements, such as Mo, Nb, V, Ti, B, Re elements. The composition design is relatively complicated and messy, which increases the difficulty of smelting; the cost is also high, and it is mainly suitable for pipeline manufacturin...

AI Technical Summary

Problems solved by technology

The composition design is relatively complicated and messy, which increases the difficulty of smelting; the cost is also high, and it is mainly suitable for pipeline manufacturing