The method of applying a powder of composite alloys
(57) Abstract:The invention can be used in the manufacture and repair of parts subject to frictional wear. The method of applying a powder of composite alloys includes heating the powder by high frequency currents, feeding it to the surface of the product transporting gas is air and the cladding deposited powder by high frequency currents. 1 Il. The invention relates to a method of applying the powder composition of the alloys and can be used in the manufacture and repair of moving parts.The known method of gas-plasma deposition of powder coating materials with melting by high frequency currents 
The disadvantages of this method are the increased energy consumption, powder materials, low productivity of the process and the complexity of the automation, as well as a high degree of cracking due to internal stresses arising.Known method of applying a powder of composite alloys, including warm-up and the supply of powder on the surface of the product transport medium containing the air 
The disadvantage of this method is the low adhesion St is etenia is to reduce the cost of the process, the reduction of thermal effects on hardening item with a simultaneous increase in the adhesion, strength and antisnore properties.Another objective is carried out by applying a powder of composite alloys, including warm-up and the supply of powder on the surface of the product by air, characterized in that the heating of the powder produced in the field of high-frequency currents, and after the filing of the powder on the surface of the product is carried out welding by high frequency currents.The invention is illustrated in the drawing.The proposed method of applying a powder of composite alloys provides high adhesive properties, high wear resistance and strength of the applied coating due to the high hardness of the melted areas, toughness and ductility of the base material.For the implementation of the method requires a small amount of carbide powder materials and energy due to the minimal heat loss. The positive features of the method include: use as a carrier powder materials of atmospheric air, low noise process, high automation process, etc.Example. induction metallization.Roller water pump (1), made of steel 45 (0.45% of carbon), is installed in the rotating device, for example, cartridge screw-cutting lathe (2), combined with the installation of HDTV type VCG-60/044 (not shown in the figure). On the processed surface of the deposited heated by high frequency currents by means of special inductor (3) of powder material (4), for example, carbon doped alloy GHG-On 27 (3,9%C, 26%Cr, 1.5% of Si, 1.7%of Ni, 0.3%of W, 1.1%of Mn, and the rest Fe) supplied from a dispenser (5) in the zone of treatment of the air stream (6) from the injection device (not shown in the figure), with subsequent reflow the deposited layer with the main material of the workpiece. The melting temperature is equal to 1280-1320 degrees C. High strength and wear resistance of the hardened surface caused by the microstructure and hardness of fused areas (55-60 HRC).Sources of information
1. Potapov, K. Mamleev H M Flame surfacing plating reflow HDTV. J. engineering in S.-H. N 12. 1978.Auth. St. USSR N 1759559. A method of obtaining a wear resistant composite coating. The method of applying a powder of composite alloys, involving heating of the powder and applying it to a surface the filing of powder on the surface of the product carry out his welding by high frequency currents.
FIELD: portable apparatuses for applying coatings of powder materials by gasodynamic deposition.
SUBSTANCE: apparatus includes compressed gas source, powder meter, deposition unit in the form of portable manual tool with remote control having supersonic nozzle and gas heater rigidly connected with it. Gas heater includes metallic body inside which electric and heat insulation having through mutually parallel pneumatic ducts with inserted in them heating members. Apparatus also includes pneumatic duct for feeding powder from powder meter to supersonic nozzle, locking devices and unit for controlling deposition process, said units are mutually connected through flexible pneumatic ducts and electric connection wires. According to invention electric and heat insulation of gas heater includes inner and outer cylinders coaxially arranged one inside other. Inner cylinder has central through passage for placing pneumatic duct for feeding powder from meter to supersonic nozzle. Pneumatic ducts along its periphery are in the form of grooves. Inner and outer cylinders of electric heat insulation of gas heater are made of heat resistant material having electric and heat insulated coating on surfaces restricting pneumatic ducts.
EFFECT: enlarged manufacturing possibilities, simplified design, lowered mass, improved capability for repairing works, enhanced operational efficiency.
2 cl, 3 dwg
FIELD: finish treatment of precision friction pairs requiring high quality of treatment at retaining starting dimensions, for example, high-precision machines and tools and diesel engine supply equipment.
SUBSTANCE: friction surface is degreased, dried and technological medium is applied to it by means of brush, for example. Brass rod is fitted at angle of 45-60 deg. relative to surface being treated. When rod is pressed at simultaneous switching-on of electric machine, it forms shocks over surface being treated; energy of shock is equal to 0.5-0.7 J.
EFFECT: improved quality of coat at low porosity.
2 cl, 2 dwg, 1 ex
FIELD: machine engineering, other branches of industry, namely deposition of coatings of powder materials for imparting different properties to coated surfaces.
SUBSTANCE: apparatus includes deposition unit having electric heater of compressed gas and supersonic nozzle. The last is rigidly joined with outlet of electric heater and has member for introducing powder to nozzle. Apparatus also includes control unit connected with electric heater of compressed gas by means of flexible pipeline and electric cable; powder feeder whose outlet is connected with member for introducing powder to nozzle by means of flexible pipeline. In order to enhance operational safety of apparatus due to lowered temperature of outer members of electric heater of compressed gas, the last includes casing in which metallic housing is arranged with gap filled with heat insulator. Fuel member is arranged in metallic housing having openings for blowing non-heated gas through casing. Member for introducing powder to nozzle is provides powder feeding to supercritical portion of supersonic nozzle at inclination angle relative to its axis.
EFFECT: enhanced efficiency of apparatus due to uniform distribution of powder along nozzle.
39 cl, 13 dwg
FIELD: equipment for plasma-powder fusing or deposition of powders.
SUBSTANCE: powder feeder comprises casing-chamber, powder hopper arranged in upper part of casing-chamber and equipped with discharge opening, which is aligned with annular charging channel of rotating disk provided within casing-chamber, and drive arranged in lower part of casing-chamber. Ejector is disposed on casing-chamber at opposite side of hopper and equipped with supersonic nozzle and intake branch pipe of intake chamber. Intake branch pipe is aligned with annular charging channel of rotating disk. Agitator mounted within powder hopper is equipped with drive.
EFFECT: improved quality of coating deposited.