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

The invention relates to a method and equipment for manufacturing a gradient functional structure through arc welding and quick forming. By adopting the technology of outer-field compounding, molding, forcible temperature control, sequential growth, and whole welding forming, a double metal gradient material is subjected to in-situ alloying, and the gradient functional structure is manufactured in a near net way; and in the method, an electromagnetic stirring action, an electromagnetic metallurgical action and an ultrasonic welding action are adopted, the large-volume welding pool liquid metal solidification process is comprehensively controlled, and the gradient functional structure is manufactured by matching a high-speed wire feed system, a mould forcible temperature control system, a near net forcible sequential growth whole forming system, and an in-situ alloying gradient material. The equipment is formed by integrating and combining an electromagnetic welding system, an ultrasonic welding system, and an efficient welding system. By the method and the equipment for quickly manufacturing the gradient functional structure by a non-layered welding structure in a low-cost way, a manufacturing period is reduced, production efficiency is improved, and the high reliability and the long service life of the gradient functional structure are guaranteed.

The invention discloses an overlaying welding agent core welding wire with abrasive wear resistance. A steel strip is wrapped with alloy powder and is subjected to drawing path by path and diameter reduction through a wire-drawing die to form the overlaying welding agent core welding wire, wherein the diameter of the overlaying welding agent core welding wire is between 2.4 and 3.2 mm; the lengthof the overlaying welding agent core welding wire is freely set; the steel strip is one of an SPCC steel strip, a 08A steel strip and a 08Al steel strip with width of between 18 and 22 mm and thickness of 0.45 and 0.6 mm; and the aluminum alloy powder is manufactured from waste steel and an alloying agent. The overlaying welding agent core welding wire is designed according to the composition requirement of overlaying welding metal; and compositions are fully homogenized in the smelting process of pulverization, thereby overcoming the disadvantages that the prior medicine powder for producingthe overlaying welding agent core welding wire adopts a mechanical mixing process to easily cause unevenness of the compositions. The overlaying welding agent core welding wire uses the waste steel as one of raw materials of the overlaying welding agent core welding wire with abrasive wear resistance, fully utilizes contained alloy elements, improves the utilization rate of the alloy elements, reduces the cost for the overlaying welding agent core welding wire and achieves the aims of energy conversation and emission reduction.

The invention provides a carbon dioxide gas shielded welding method for an austenitic stainless steel pressure container. The carbon dioxide gas shielded welding method comprises the following steps that end faces, to be welded, of base metal are polished to form 30-degree oblique faces, the two pieces of base metal to be welded are assembled to form a V-shaped groove, the gap between the two pieces of base metal ranges from 1 mm to 2 mm, the unfitness of a butt joint is 1 mm or smaller, and then priming coat welding, packing layer welding, back face packing layer welding, back face and cover face layer welding and cover face layer welding are sequentially carried out on a weld seam according to welding process parameters of different welding layers. According to the characters of the austenitic stainless steel pressure container, the reasonable welding sequence and the welding process parameters are determined, the welding heat affected zone is relatively narrow, welding stress and deformation of austenitic stainless steel are reduced, the corrosion resistance of a workpiece after the austenitic stainless steel is welded is improved, and the welding quality of the austenitic stainless steel is improved. By means of the welding method, the weld seam is fine in surface line, attractive in shape and weak in splashing, and the appearance quality of the pressure container weld seam is improved.

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 provides an alkaline welding flux cored wire protected by CO2 gas or 80Ar + CO2 gas. The alkaline welding flux cored wire comprises flux cored powder and a steel belt wrapping the flux cored powder. The alkaline welding flux cored wire protected by CO2 gas or 80Ar + CO2 gas is characterized in that the flux cored powder of the flux cored wire is composed of, by weight, 10-25% of rutile, 15-35% of silicon manganese alloy, 25-40% of iron powder, 4-15% of nickel powder, 1-10% of aluminium magnesium alloy, 1-6% of marble, 1-6% of fluorite and 3-15% of ferrovanadium. The alkaline welding flux cored wire protected by CO2 gas or 80Ar + CO2 gas has the advantages that the flux cored wire can be applied to welding of high-strength and high-ductility steel which is of the level larger than or equal to 700Mpa and guaranteeing overall performance, welding joints are purified and clean in the welding process, nonmetallic inclusion is little, the content of diffusible hydrogen is low, and the low temperature impact toughness value of welding metal is high.

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.