Application of polymer-powder slurry for fabrication of abrasion resistant coatings on tool materials

摘要

Purpose: Development of a new generation tool materials on the basis of M2 high speed-steel or 41Cr4 steel covered with the carbides. Application of pressureless forming of powder as a manufacturing method of anti-wear coatings gives the possibility to produce this materials with relative low cost of production.Design/methodology/approach: Powder metallurgy, pressureless forming of powder, sintering, microstructure examination, X-ray dispersive energy examination, hardness examination.Findings: Putting down coatings with this method does not call for using the costly equipment for the physical or chemical deposition of coatings from the gaseous phase. Coating thickness may be easily regulated by applying the powder-binder slurry layer once or several times on the prepared substrate surface. Hardness of coatings in the sintered state is higher compared to the HS6-5-2 and 41Cr4 steels by about 400 and 700 HV respectively. It is expected that hardness of the coatings and substrate will grow after their heat treatment.Practical implications: Application of powder metallurgy and especially pressureless forming of powder to manufacturing of steel covered with anti-wear coatings gives the possibility to obtain tool materials with the relative high ductility characteristic of steel and high hardness and wear resistance typical for cemented carbides.Originality/value: One can state, based on the investigations carried out, that the pressureless forming of the powder may be used for depositing the anti-wear coatings onto the tool materials and other elements in the abrasion wear service conditions.