Surfacing electrode for green refabrication technology for composite bimetal hot shear edge

Abstract

The invention discloses a compound bimetal hot shear edge green reproducing technique surfacing electrode. A coating of the electrode covering comprises the following components in weight percentage: 1 to 2 percent of titanium white powder, 30 to 40 percent of marble, 10 to 20 percent of fluorite, 3 to 7 percent of quartz, 2 to 4 percent of chalk, 0 to 2 percent of soda, 5 to 9 percent of high carbon ferrochrome, 2 to 5 percent of high-carbon ferromanganese, 1 to 4 percent of ferrosilicon, 6 to 9 percent of ferrotitanium, 2 to 4 percent of ferrovanadium, 3 to 6 percent of ferromolybdenum, 2 to 4 percent of cerium oxide, 2 to 4 percent of lanthanum oxide, 5 to 9 percent of metallic nickel, 4 to 7 percent of ferrotungsten and 2 to 5 percent of graphite; the core wire is a H08A steel welding wire; and, the modulus of the adopted bonding agent water glass is between 2.7 and 3.0, and the Baume degree concentration is between 48 and 50. The surfacing electrode does not need the before-welding pre-heating and the after-welding heat treatment and can repair and reproduce the hot shear edge under conditions of at the relative low-temperature pre-heating and heat treatment, and the deposited weld metal has good anti-crack performance and can be conveniently used on site; the hardness range is HRC45 to 55; and, under the condition of no pre-heating and no heat treatment, the service life of the repaired parts is nearly 3 times longer than that of the original parts, and under the conditions of pre-heating and heat treatment, the service life is improved by 6 to 8 times.

Description

technical field [0001] The invention relates to the field of material science and engineering, in particular to a surfacing welding electrode for green remanufacturing technology of composite bimetal hot shear blades. Background technique [0002] The hot shear blade is the main tool used by iron and steel enterprises to cut off hot-rolled billets. When working, the upper and lower cutting blades directly cut the red hot steel billet at about 1000°C under the action of huge pressure, and the cutting blades are rapidly cooled by cooling water. The cutting edge bears a large compressive stress and impact force when working, and at the same time, the surface of the cutting edge has strong thermal friction and thermal fatigue. The above service conditions require that the overall cutting edge has a higher yield strength and better impact toughness, while the cutting edge part also requires a higher red hardness and thermal fatigue performance. At present, most of the hot shear...

AI Technical Summary

Problems solved by technology

The overall manufacturing of parts such as thermal shears is not only expensive, but also because the working layer is only on the surface, the advantages of precious alloy elements inside cannot be fully utilized