Gas-shielded overlaying flux cored soldering wire for repairing hot-forging mould

Abstract

The invention discloses a gas-shielded overlaying flux cored soldering wire for repairing a hot-forging mould, which is manufactured by taking SPCC-SD cold-rolling low-carbon steel belts as raw materials of a soldering wire and utilizing a conventional flux cored transient alloy way, a universal flux cored standard and a flux cored soldering wire manufacturing technique. The soldering wire flux core contains fluoride, calcium carbonate, feldspar, magnesia and alloy powder according to a proportion, wherein the fluoride comprises calcium fluoride, sodium fluoride and barium fluoride, and the alloy powder contains iron powder, high-carbon ferrochrome, electrolytic manganese, ferrosilicon, ferromolybdenum, ferrovanadium, nickel powder, tungsten powder and cobalt powder. The invention has the following beneficial effects: because the gas-shielded overlaying flux cored soldering wire takes CO2 or a gas mixture with volume percentage ratio of 80% Ar and 20% CO2 as the protective gas, the gas-shielded overlaying flux cored soldering wire has the advantages of great soldering technique, stable electric arc, less splash, easy deslagging, good crack resistance, great high-temperature hardness and thermal fatigue resistance, continuous soldering and improvement on production efficiency.

Description

technical field [0001] The invention belongs to welding material preparation technology, in particular to a gas-shielded surfacing flux-cored welding wire for repairing hot forging dies. Background technique [0002] After the hot forging die is used thousands of times, the mold cavity must be repaired. The repaired mold can reach or even exceed the service life before the repair. At present, surfacing welding electrodes are mainly used for repairing hot forging dies in China, and the efficiency is low. The use of flux-cored wire repair can realize continuous welding and improve production efficiency. The welding slag of flux-cored wire is far less than that of welding rod, which improves the deposition rate and reduces the workload of slag removal. Contents of the invention [0003] The purpose of the present invention is to address the above existing problems, to provide a gas-shielded surfacing flux-cored welding wire for hot forging mold repair, using the gas-shield...

AI Technical Summary

Problems solved by technology

At present, the repair of hot forging dies in China mainly uses surfacing electrodes, and the efficiency is low.