Heat-resistant flux-cored wire

Abstract

The invention discloses a heat-resistant flux-cored wire. The heat-resistant flux-cored wire comprises a carbon steel sheath and powder filled into the carbon steel sheath. The powder comprises 0.04 to 0.1% of Cr, 0.06 to 0.12% of Mo, 1.2 to 1.8% of Mn and 1.4 to 2% of Si, based on the total weight of the wire. The heat-resistant flux-cored wire has following beneficial effects: the flux-cored wire is added with C in order to ensure strength of welded metal and the flux-cored wire is added with Si in order to decrease the oxygen content of deposited metal; the mobility Mo of deposited metal is improved such that the welded metal structure becomes stable on the high-heat input welding high-level temperature condition and metal toughness and strength are guaranteed; the flux-cored wire is added with S in order to transfer molten pool flow from the exterior to the interior and welding slag is collected in the interior so that welding slag is eliminated much easily and tidiness of a weld pass is improved; and by adjusting components and content of power, the manufactured flux-cored wire has characteristics of high welding strength, a stable electric arc, easy slag removal, resistance to high temperature.

Description

technical field [0001] The invention relates to the technical field of metal welding materials, in particular to a heat-resistant flux-cored welding wire. Background technique [0002] Flux-cored welding wire, also known as tubular welding wire or powder-cored welding wire, is a high-efficiency welding material developed in the 1950s. By adjusting the type and proportion of flux-cored additives, it is very convenient to design various welding materials for different purposes. To meet the requirements of different industrial and mining equipment components under different conditions, it is used to weld various types of steel. Flux-cored wire not only has the formula adjustability of coated electrodes, but also has the characteristics of continuous welding with solid wire. Flux-cored welding wire is attracting great attention from domestic and foreign welding circles with its incomparable technology and economy. [0003] The existing welding wire is relatively successful in ...

AI Technical Summary

Problems solved by technology

[0003] The existing welding wire is relatively successful in terms of stability, but its heat resistance and the integrity of the welding part are relatively unsatisfactory. Therefore, the inventors provide a heat resistance by studying the composition and content of the powder in the flux-cored wire. Strong, flux-cored wire that can effectively suppress the amount of welding slag in the welding process and ensure that the welding surface is complete and clean