CONVERSION COATINGS ON MAGNESIUM ALLOY DIE CASTINGS PART 1: THE EFFECT OF TECHNOLOGICAL PARAMETERS OF THE PRESSURE DIE CASTING PPROCESS ON THE QUALITY OF CASTINGS MADE FROM THE AZ91 ALLOY

The article presents the results of research on the selection of optimum technological parameters of the hot-chamber die casting machine operation to make castings in AM50 magnesium alloy, coated next with the deco...

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STRUCTURE FORMATION AND PROPERTIES OF Cr₃C₂ – NiCr CARBIDE COATINGS APPLIED BY PLASMA SPRAYING ONTO THE SURFACE OF DUCTILE IRON CASTINGS

The study presents the results of structure examinations and mechanical tests carried out on coatings based on Cr3Cr2-NiCr chromium carbide, applied onto the surface of ductile iron castings. The chromiu...

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CONVERSION COATINGS ON MAGNESIUM ALLOY DIE CASTINGS PART II: DEVELOPMENT OF A TECHNOLOGY FOR FABRICATION OF DECORATIVE AND PROTECTIVE COATINGS ON MAGNESIUM ALLOY DIE CASTINGS

The article presents the results of investigations of a technology for fabrication of decorative and protective chromate coatings on die castings made from AZ91 (MgAl9Zn1) magnesium alloy. As a result of the investigat...

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Studies of protective coatings used for metal moulds

The die casting method is based on casting into permanent metal moulds, which makes it possible to obtain a large amount of casts with practically identical shapes. Compared to the technology of sand mould casting, this method has many advantages....

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Impact of penetration depth of protective coating on thermal deformation of masses determined by the hot distortion parameter

Protective coatings are applied in order to obtain casts with an even surface, without faults. Protective coatings can contain a solvent based on water or alcohol; however, due to their harmfulness, it is recommended to limit the use of alcohol co...

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Selected methods of testing protective coatings applied on casting moulds and cores

This article presents selected research methods related to protective coatings used for sand moulds and cores in the foundry industry. The research methodology has been divided into studies of the technological properties of sand moulds and cores ...

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Characteristics of new generation water and alcohol coatings and their impact on the quality of the casting surface layer

The increasing requirements of casting users regarding the dimensional accuracy and surface roughness of castings force the manufacturers, i.e. foundries, to use protective coatings on moulds and cores. Coatings are applied in ...

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Adhesion and abrasibility of selected protective coatings for loose self-setting sand combined with organic binders

Testing the properties of mould and core sands are specified in the norms and standards, which are used to determine the suitability of the sand for specific applications. However, the testing of protective coatings for moulding&nbs...

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