Filling metal particle for welding and manufacturing method therefor

Abstract

A stuffing metal grain for soldering with diameter of 0.1-5.0mm, with the mass percentage of C less than 0.15%, S less than 0.035%, P less than 0.035%, oxygen less than 50ppm, nitrogen less than 50ppm, with other alloy elements like Mn being 0.1%-2.0%, Si 0.02%-1.8%, Mo less than 2.5%, Cr less than 3.5%, Ni less than 6.0%, Ti less than 0.5%, V less than 0.5%, Nb less than 0.5%, Cu less than 0.5%, and B less than 0.09%. It is simple in process, with greatly reduced cost.

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 welding and a preparation method thereof. Background technique [0002] With the development of welded structures in the direction of large-scale and high-parameterization, the number of welded structural parts above medium thickness has increased dramatically. The welding processes currently used are generally submerged arc welding, gas shielded welding, electrode arc welding, and gas-electric vertical welding. When welding, prefabricate the groove on the edge of the steel plate, add a backing plate (or liner) on the back or use a small welding heat input to weld the bottom weld at the bottom of the groove, and then perform multi-layer and multi-pass welding. Electrode arc welding requires constant replacement of electrodes, which not only reduces production efficiency, but also easily produces welding defects at the joints ...

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 broken welding wire and its production process have the following deficiencies: first, the alloy composition of the broken 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; It is more difficult to make wire rods, especially wire rods with a diameter of less than 0.8mm, which makes it difficult for this kind of crushed welding wire to be used for welding high-strength, heat-resistant metals, which greatly limits its application field; the third is the production of crushed welding wire The process is complicated, and the raw materials come from hot-rolled wire rods for special welding in iron and steel enterprises, making the production cost high