A kind of submerged arc welding wire for high-rise building structure refractory steel

Abstract

The invention discloses a submerged arc welding wire used for fire-resistant steel in high-rise building structures. The chemical element weight percentage content of the submerged arc welding wire is C: 0.03-0.16%; Si: 0.10-0.20%; Mn: 0.40-1.00% ; Ni: 0.20-0.50%; Mo: 0.05-0.20%; Ti: 0.01-0.05%; B: 0.0005-0.002%; Nb: 0.01-0.04%; Al: 0.01-0.04%; N: 0.001-0.004%; the rest is Fe and unavoidable impurity elements. The submerged arc welding wire of the invention has simple components, and the deposited metal and welded joints formed by welding have excellent comprehensive mechanical properties, high high-temperature tensile properties, high low-temperature impact energy, low cost, and good application prospects.

Description

Technical field [0001] The present invention relates to the field of welding materials, and more particularly to a submerged arc welding wire for high-rise building structural refractory steel, and more particularly to a submerged arc welding wire for the yield intensity of 345 MPa stage. Background technique [0002] With the rapid development of high-rise buildings, based on safety, economy, modernity, space utilization, fire-resistant steel has advantages such as high, lightweight, refractory, earthquake resistance and non-pollution compared to fire-resistant coatings. It will become the preferred material for large architectural structures in the world. [0003] The general condition of fire-resistant steel is carried at normal temperature, so it should have a high strength at normal temperature, however, the building structure is in the process of use, it is inevitable to withstand the impact, high temperature, distortion, etc. of the earthquake, fire, etc. The role, so refr...

AI Technical Summary

Problems solved by technology

[0005] Refractory steel welding wires for building structures are generally designed with high Mo to achieve their high-temperature strength. However, the addition of a large amount of Mo elements will inevitably greatly increase the cost of materials.

Chinese patents CN108857140 and CN108941972 disclose that 0.20% to 0.59% of Mo is added to the welding wire; Chinese patent CN108788518 discloses that 0.60% to 1.00% of Mo is added to the gas shielded welding wire; 0.25% is added in Chinese patent CN102717206 ~0.60% Mo element; these welding wires for refractory steel all add more mass fraction of Mo element to achieve excellent high temperature tensile strength, but there is a problem of high processing cost

Images