High-chromium-manganese austenitic steel alkalescent full-position gas-protection flux-cored wire

Abstract

The invention discloses a high chromium and manganese type austenite steel alkali full-position gas shielded flux-cored wire, which comprises a 0Cr17 stainless steel band sheath and flux cored, wherein, the flux cored is prepared by mixing the following components by the weight percentages: 4-10 percent of rutile, 1-5 percent of feldspar, 0.5-2 percent of sodium carbonate, 8-15 percent of fluorspar, 0.5-1.5 percent of sodium fluosilicate, 40-68 percent of manganese powder or low carbon ferromanganese, 1.5-20 percent of chromium powder, 0-15 percent of nickel powder, 2-4 percent of graphite, 0-15 percent of molybdenum powder or ferromolybdenum, 0.5-4.5 percent of ferrosilicon and iron powder in balancing amount. The invention has the advantages that the ductility of the welding wire is good, the diameter is small, the small-scale welding can be conducted, the impurity content is low, and the hot cracking resistance is good; meanwhile, the splashing degree of the welding wire is low, the welding mold is good, the slag detachability is good, the excellent processing property such as the full-position welding can be conducted, and the production efficiency of the welding is high.

Description

technical field [0001] The invention relates to a gas-shielded flux-cored welding wire, in particular to an alkaline all-position gas-shielded flux-cored welding wire for high-chromium-manganese type austenitic steel. Background technique [0002] The surfacing metal structure of high-chromium-manganese austenitic steel welding materials is pure austenite in the welded state, which has good toughness and strong machinability. HRC45~55, and the austenite structure with good toughness is still under the hardened layer. Therefore, it is mainly used for welding thermal shears and hot saws resistant to high temperature impact wear; valve sealing surfaces resistant to medium temperature and high pressure; water turbine blades resistant to cavitation at room temperature; also suitable for surfacing welding of high manganese steel with high wear resistance and toughness requirements. , such as screw conveying mechanism, bulldozer blade, grab bucket, crushing blade, etc. At present...

AI Technical Summary

Problems solved by technology

At present, this kind of welding material mainly uses welding rods, but it has two obvious deficiencies in the welding production process: 1. Low welding production efficiency; 2. Poor welding process performance

Flux-cored welding wire can make up for these deficiencies. Because this single-phase austenitic welding material is prone to hot cracks, it is not suitable to use acidic slag series, and the basic welding wire on the market often has poor process performance and is difficult to meet these requirements.