Improve the the stainless wear resistance of thermal spray and plating method

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1, the thermal spray

Thermal spraying is the use of some heat source to the coating material is heated to a molten or semi-molten state, and simultaneously by means of a flame st ream and a high-speed gas to atomization, and to promote these atomized particles are sprayed onto the substrate surface, deposition into with a certain The function of the coating. Thermal spray workpiece surface abrasion resistance, corrosion resistance, high temperature coating. Often exists between the coating material and substrate combination of three ways: mechanical bonding, physical bonding, and metallurgical bonding. With the low pressure plasma spraying, high-energy, high velocity plasma spraying, the emergence of high-speed flame spraying technique, the performance of the coating has been further improved: the porosity can be reduced from 015% to 1%; the bonding strength of the coating and the substrate can be up to 70 ~ 140MPa .pipe fittings

Studies have shown that HVOF spraying (HVOF) technology and plasma spraying (ASP) technology, iron-based amorphous alloy coating and iron-based amorphous and nanocrystalline coating, were prepared the 0Cr13Ni5Mo stainless steel substrate studied two Tu layer at room temperature friction and wear characteristics, the results show that the two sprayed prepared iron-based coating has high microhardness and smaller porosity, compact structure, was typical of the layered structure, improved coating wear resistance.
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2, plating

In order to compensate for stainless steel and soft not wear, and the vulnerability of a large friction coefficient, the electroplating method commonly used to improve the stainless steel shaft and the mating member such as surface hardness and self-lubricating properties. Stainless steel is a surface easily passivated metal must be removed before plating surface passivation film, stainless steel degreasing, dipping, activation, pre-plated nickel and electroplating processes, chromium, zinc, copper, tin, precious metals can be obtained and other coatings.stainless steel clamps

Study shows that in the base material of stainless steel turbine cycle inverted rare earth chromium plating, the plating thickness of about 013mm, coating by the metal matrix phase and a rare earth salt particles the second phase composition, the hardness can reach 900 to 1000 Hv, the abrasion resistance of the coating base material 25 to 28 times, the product of the working life of 2 to 6 times higher than the original pieces of stainless steel