The principle of plasma alloy powder welding

       The heat source used in the plasma surfacing welding machine technology is plasma arc, which uses the high temperature generated by plasma arc to quickly heat and melt the alloy powder used to make the wear-resistant layer on the surface of the workpiece and the surface of the workpiece substrate together to make the alloy powder welding material and the substrate The materials are fully mixed, diffused, and solidified. After the plasma beam leaves, the self-shape cooling is formed to form a high-performance cemented carbide layer, so as to realize the strengthening and hardening of the surface of the part, and the high hardness and high wear resistance of the workpiece surface , Corrosion resistance, impact resistance, oxidation resistance and other excellent effects.



Advantages of PTA plasma alloy powder welding:



 1: Plasma surfacing cladding alloy layer is metallurgically bonded with the workpiece matrix, and the bonding strength is high. The hardness of the alloy layer is above 50HRC-60HRC. The hardness of various surfacing alloy layers is higher than that of ordinary metals after surfacing 3 To 5 times.



 2: Fast surfacing cladding speed, low dilution rate; the dilution rate of powder plasma arc surfacing can be controlled at 5%-15% or lower.



 3: The metal structure of the surfacing layer has good compactness and beautiful appearance; the surfacing process is easy to realize automatic production, which improves labor productivity and reduces labor intensity.



 4: It is possible to directly perform powder plasma arc surfacing welding on the surface of rusty and oily metal parts without complicated pretreatment processes, and there will be no surface bubbles due to unclean surface treatment.



 5: Compared with other powder plasma spray welding, the equipment has convenient structure, low consumption, practicality, easy operation, convenient maintenance and small area.



 6: The plasma arc temperature is high, the energy is concentrated, the process stability is good, the interference of external factors is small, the residual stress caused on the workpiece and the metal quality of the substrate are small.



 7: The welding process has good controllability. The surfacing effect can be controlled by adjusting the current, gas flow, powder feeding speed, surfacing welding speed and plasma arc swing amplitude, so as to obtain an excellent high-quality and beautiful alloy metal cladding layer.



 8: The alloy metal powder materials used in plasma powder welding have a wide range and are easy to collect and purchase on the market. As a deposited material, surfacing alloy powder is not restricted by casting, rolling, wire drawing and other processing techniques, and can be based on different performance requirements The configuration of alloy powders with different compositions and different proportions is particularly suitable for hard wear-resistant alloys that are difficult to wire but easy to powder to obtain the required high-performance alloy surfacing layer.



 9: There are common metal objects suitable for welding: such as: various screw feeding propulsion rods with high wear resistance, various agricultural machinery blades with high wear resistance, and various mining machinery accessories with high wear resistance Such as: wear-resistant surfacing welding of picks, wear-resistant repair of oil cylinders, shovel teeth of forklifts, bucket teeth of excavators, and wear repair of alloy tracks of excavators, which require high wear resistance, corrosion resistance, high temperature resistance, and strong friction resistance Various industrial valves, water pump blades, drill bits and accessories for drilling in various oil fields that require high wear resistance.



 10: Products are used in the manufacturing and processing of mining machinery, cement machinery, metallurgical machinery, agricultural machinery, construction, power stations, railways, vehicles, energy, military, petroleum, chemical, aerospace, molds, tools, medical equipment, automobiles, and other industries With repair and remanufacturing.