Hard-face overlaying welding material and use thereof

Abstract

The invention discloses an overlaying welding alloy material which can resist abrasion and corrosion and can be moulded without crack, and usage thereof. Counted by weight percentage, the welding alloy material comprises the components as follows: 0.4-0.6 percent of C, 0.6-1.0 percent of Si, 1.5-1.8 percent of Mn, 0.8-1.2 percent of Mo, 14-16 percent of Cr, 0.6-1.0 percent of W, 0.3-0.5 percent of Nb, 0.05-0.1 percent of V, 0.05-0.1 percent of rare earth, not more than 0.035 percent of S, not more than 0.035 percent of P and the balance of Fe, wherein, the amount of the components is 100%. The welding process matching the material comprises that the heating temperature is 180-230 DEG C; the interlayer temperature is 250-300 DEG C and the backfiring temperature is 550-650 DEG C. The invention is simple in process and adds no cost. The alloy is overlaying welded on the surface of a work piece so that the anti-abrasion capability thereof is the same as the capability of high-chromium cast iron welding material. Meanwhile, no crack forms in the moulding process, thereby enhancing the anticorrosion capability; therefore, the comprehensive performance of the material is better than that of high-chromium cast iron, so as to prolong service life of the work piece. Take for instance, the comprehensive performance of a rotor of an internal mixer is more than 1.5 times of an original one. Meanwhile, the surface is moulded without crack so that the material can also be used as hard alloy of the transition layer during manufacturing process of a super wear-resistant piece.

Description

Technical field: [0001] The invention relates to a hard surface surfacing welding material, especially an alloy welding material for surfacing welding with low stress abrasive wear and adhesive wear resistance, corrosion resistance and no cracks, which is used to solve the dual effects of chemical corrosion and wear Under the working conditions, the workpiece is formed without cracks and is wear-resistant and corrosion-resistant. Background technique: [0002] The rubber mixing equipment in the tire manufacturing industry, the internal mixer, is the source process of all rubber products. The first step of refining raw rubber is to stir and squeeze the rotor in the mixing chamber of the internal mixer. , Process the granular raw rubber into condensed rubber. In this process, all parts in contact with the rubber have to go through a process from abrasive wear to adhesive wear. At the same time, the rubber is added with carbon black, quartz sand and metal oxides during the ref...

AI Technical Summary

Problems solved by technology

For high-chromium cast iron, its hardness, wear resistance and corrosion resistance are a pair of contradictions. If you want to increase its wear resistance, you generally need to increase its hardness, and the increase in hardness will inevitably lead to an increase in crack sensitivity. The existence and expansion of oxidative corrosion intensify and the corrosion resistance declines