Filling metallic particles for overlay welding and its preparation method

Abstract

The invention discloses a stuff metal particle used in stack welding, wherein the particles are 0.1-5.0mm, comprising S less than 0.05%, P less than 0.05%, oxygen less than 60ppm, and nitrogen less than 60ppm, while other chemical components are set by object metal. The metal particles are directly granulated from waste steel and iron alloy, with high alloy utilization and low cost. The invention can prepare stuff metal particles with corrosion resistance, abrasion resistance and thermal resistance, with high alloy content.

Description

technical field [0001] The invention relates to a welding material and a production method thereof, in particular to a novel filler metal particle for surfacing welding and a preparation method thereof. Background technique [0002] Most of the mechanical parts are made of metal materials. Due to the relative movement between parts or between parts and materials, wear will occur; due to environmental influences, there will be chemical and electrochemical effects, which will cause the metal surface of the parts to be damaged. Corrosion; Some parts may be both worn and corroded, resulting in abrasion. With the development of modern industry, mechanical parts often work under extremely complex and harsh conditions, and a large number of mechanical equipment are often scrapped due to wear, corrosion or abrasion. This requires that the surface of mechanical equipment under the working conditions of high temperature and high pressure, high load, oxidation, and corrosion has good ...

AI Technical Summary

Problems solved by technology

The production process of the above-mentioned shredded welding wire is to use the hot-rolled wire rod for welding produced by the iron and steel enterprise as the raw material, make a filament with a certain diameter after multiple passes of cold drawing, and then cut the wire to make a cylindrically shaped shredded welding wire (see "Installation" magazine, No. 5 article in 2003 "Welding method of large oil tank bottom plate - broken wire submerged arc welding"), its manufacturing process is relatively complicated

The crushed welding wire and its production process have the following deficiencies: first, the alloy composition of the crushed welding wire cannot be adjusted independently, and its variety is limited by the variety of hot-rolled wire rods produced by iron and steel enterprises; secondly, it is difficult to make wire rods from metal materials with high alloy element content , especially the preparation of wire rods with a diameter of less than 0.8mm is more difficult, making it difficult for such broken wires to be used for surfacing welding, which greatly limits its application field; the third is that the production process of broken welding wires is complicated, and the raw materials come from iron and steel enterprises. Hot-rolled wire rod for special welding, making its production cost high