43results about How to "Deposition speed is fast" patented technology

The invention provides a double-consumable-electrode transfer electric arc hybrid welding power supply device which comprises a constant-voltage inverter circuit, a direct-current constant-voltage output circuit, a constant-voltage inverter circuit driving circuit, a direct-current constant-voltage output circuit driving circuit, a current switching and driving circuit, a core control circuit, an auxiliary electric arc current sampling filter circuit, an auxiliary electric arc voltage sampling filter circuit, a main arc current sampling filter circuit, a main arc voltage sampling filter circuit and a current switching circuit. The core control circuit controls alternate connection of a power switch tube in the current switching circuit to enable an auxiliary electric arc to perform wire welding on a main arc and an auxiliary arc, assists alternate burning between auxiliary welding wires and base metal, and controls power switch elements of the constant-voltage inverter circuit according to feedback current and voltage passing through the auxiliary electric arc so as to enable output voltage of the auxiliary electric arc to arrive at a preset value; and controls power switch elements of the direct-current constant-voltage output circuit according to feedback main arc current signals and main arc voltage signals so as to enable main arc output voltage to arrive at a preset value.

The invention relates to a nickelic and chrome welding permeating flux-cored wire and a preparing method. The flux-cored wire comprises an outer shell, and the outer shell is internally provided with a through hole and an arc hole, wherein the through hole penetrates through the outer shell in the axial direction, and the arc hole is formed in the periphery of the through hole in a surrounding mode. The through hole and the arc hole are filled with the materials, by weight, 20-35 parts of metal powder, 35-65 parts of alloyed powder and 8-18 parts of mineral powder. The preparing method of the flux-cored wire comprises the steps that the powder is baked into the flux-cored powder, a cold-rolled steel strip is rolled two times into a U-shaped groove structure, the flux-cored powder accounting for 8%-10% of the total weight of the flux-cored wire is added into a U-shaped groove in twice, the U-shaped groove is sealed through a forming machine, the through hole and the arc hole penetrating through the cold-rolled steel strip are formed in the axial direction of the cold-rolled steel strip, the flux-cored powder is filled in the through hole and the arc hole, the cold-rolled steel strip is drawn through a drawbench in each welding pass, the diameter of the cold-rolled steel strip is reduced in each welding pass, and therefore the nickelic and chrome welding permeating flux-cored wire is obtained. The nickelic and chrome welding permeating flux-cored wire can be perfectly welded on nickelic and chrome products, and the fusion of the welding passes is very attractive.

The invention belongs to the field of welding materials, relates to a stainless steel welding wire material, and particularly relates to a high-strength and high-abrasion-resistance stainless steel surfacing flux-cored wire and application thereof. The high-strength and high-abrasion-resistance stainless steel surfacing flux-cored wire comprises a skin and a flux core, and the flux core comprisesthe compositions of, by mass, 25-30% of metal chromium powder, 3-5% of nickel powder, 1-2% of niobium powder, 1-3% of vanadium powder, 8-10% of manganese powder, 5-8% of multi-alloys, 2-6% of rare earth compounds, 5-8% of quartz, 3-5% of magnesia, 3-5% of fluorides, 5-7% of additives, 5-8% of rutile and the balance iron powder. An appropriate amount of particle size controllable hard phases and avariety of synergistic alloy powder are added into the high-strength and high-abrasion-resistance stainless steel surfacing flux-cored wire to change the matrix structure of an existing ferritic stainless steel surfacing alloy, so that the stainless steel surfacing alloy has the advantages of high strength and good abrasion resistance; and meanwhile, preheating and post-weld treatment are not required during surfacing, and no crack is generated. The high-strength and high-abrasion-resistance stainless steel surfacing flux-cored wire is especially suitable for the application of surfacing repair of cutter blades of shield tunneling machines or spiral reamers of brick making machines.