Low-cost self-protection flux-cored wire containing multi-granularity deoxidizing agent and preparation method of low-cost self-protection flux-cored wire containing multi-granularity deoxidizing agent

Abstract

The invention discloses a low-cost self-protection flux-cored wire containing a multi-granularity deoxidizing agent and a preparation method of the low-cost self-protection flux-cored wire containing the multi-granularity deoxidizing agent. A mild-carbon steel strip serves as a skin, and a flux core is prepared from 62 wt% to 75 wt% of high carbon ferro-chrome, 10% to 25% of the deoxidizing agent and the balance iron powder. The deoxidizing agent is a mechanical mixture formed by graphite, cellulose powder, an aluminum-magnesium alloy and a silicon-manganese alloy, the graphite, the cellulose powder, the aluminum-magnesium alloy and the silicon-manganese alloy are each composed of at least two different granularities, and the flux core accounts for 52 wt% to 56 wt% of the mass of the flux-cored wire. According to the flux-cored wire, deoxidization is full in the whole welding stage, the welding processing property is remarkable, a bead weld layer has the beneficial effects of being high in hardness, good in wear resistance and the like, the surface of a weld bead is basically free of slag, slag removal is not needed during multilayer welding, and the manufacturing cost of the flux-cored wire is low.

Description

technical field [0001] The invention belongs to the field of welding in material processing engineering, and in particular relates to a low-cost self-protection flux-cored welding wire containing deoxidizers of different particle sizes and a preparation method thereof. Background technique [0002] Since the self-shielding flux-cored wire has the advantages of easy operation, no need to add shielding gas, and high deposition efficiency, it has unique advantages in the field repair of large wear-resistant parts and has a wide application prospect. However, the self-shielding flux-cored wire can only rely on the flux core components to achieve functions such as deoxidation, nitrogen fixation, and gas generation during the welding process, so as to protect the molten metal. However, many deoxidizers are more prone to deoxidation reaction in a certain high temperature period, and are quickly consumed in large quantities, so that it is impossible to ensure that deoxidation reacti...

AI Technical Summary

Problems solved by technology

However, many deoxidizers are more prone to deoxidation reaction in a certain high temperature time period, and are quickly consumed in large quantities, so that it is impossible to ensure that deoxidation reaction occurs in the entire welding temperature range, especially in the molten pool stage in the later stage of welding. Deoxidation effect

This leads to problems such as porosity, large spatter, and poor weld formation in current self-shielded surfacing flux-cored wires, and there is still room for further improvement in process performance.

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