Powder Metallurgy Reconditioning of Food and Processing Equipment Components

Nafikov, M.Z.; Aipov, R. S.; Konnov, A. Yu.

doi:10.1134/s0036029517120114

Cited by 2 publications

(2 citation statements)

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“…In the literature, there is a limited number of studies that refer to welding reconditioning possibilities of different types of products, made of steel, cast iron [30][31][32][33][34][35][36][37][38] or non-ferrous materials [39]. In terms of welding reconditioning products made of titanium alloys, Petrik I.A.…”

Section: Introductionmentioning

confidence: 99%

Reconditioning by Welding of Prosthesis Obtained through Additive Manufacturing

Ronțescu

Amza

Bogatu

et al. 2022

Metals

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Biocompatible titanium alloys are increasingly being used to make custom medical implants using additive manufacturing processes. This paper considered the welding reconditioning of a titanium-alloy customized additive manufactured hip implant with several manufacturing defects. The personalized implants are made starting from a Computer-Aided Design (CAD) model as a direct result from the medical imaging investigations of the areas of interest. Then the customized implant is fabricated using an additive manufacturing process (in this case Powder Bed Fusion—Direct Metal Laser Sintering—DMLS). The analysis of the chemical composition values as well as the values of the mechanical properties of the samples obtained via DMLS additive manufacturing process, revealed that such a manufacturing process can be successfully used to make customized surgical implants. The mechanical properties values of the DMLS samples are approximately equal to those specified by the manufacturer of the titanium powder used for sintering. On average, the tensile strength was found to be 24.75% higher, while yield strength 22.7% higher than the values provided in the standard for surgical implants applications. In case the additive manufacturing process produces products with defects one might want to try and recover the implant due to costs and time constraints. The Tungsten Inert Gas (TIG) welding reconditioning process with ERTi-5 Ti64 rod for welding titanium alloys with a content of 6% aluminum and 4% vanadium filler material was used to restore the geometric characteristics as well as the functional properties of a custom hip medical prosthesis. After welding depositing successive layers of materials, the surfaces of the prosthesis were machined to restore the functional properties according to the characteristics of the original 3D model. A 3D scan was used to compare the geometrical characteristics between the original part and reconditioned one. Deviations were less than 1 mm and were acceptable from the medical point of view.

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Section: Introductionmentioning

confidence: 99%

Reconditioning by Welding of Prosthesis Obtained through Additive Manufacturing

Ronțescu

Amza

Bogatu

et al. 2022

Metals

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“…Moreover, it is known from the powder metallurgy that the powder body is unstable because of abundant free energy. This is primarily caused by the presence of an extremely advanced internal phase interface between the solid body and pores [27][28][29][30][31]. Besides, the problems of wear resistance when using the fillers of powder compositions are underexplored, which allow to control the structure and physical mechanical properties of deposited reconditioning and / or hardening coating [24,[32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Tribological Properties of Coatings Obtained with Electrocontact Welding of Metal Powder Materials

Saifullin¹,

Islamov²,

Kuznetsov³

et al. 2020

Tribol. Ind.

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The investigations of tribo mechanical properties of coatings obtained with electrocontact welding of sintered powder materials and powderpolymer fillers of Russian manufacture are presented. It is proved that the introduction of antifriction components (powders of copper or tin) into filler material at a rate of 5-10 % increases the time to joints seizure by 1.5-2 and decreases by 1.5 the friction ratio. The application of powderpolymer and sintered fillers reinforced with metal grid produces a relief on the operating surface of the coating with the areas possessing minimum hardness. They are worn out more intensely and the forming herewith grooves help to keep lubricating oil on the friction surface. For the friction pair operating in abrasive wear conditions with adhesive wear elements, at welding it is recommended to use powder compositions (by weight): 80-90 % -PG-FBX6-2, 10-20 % of copper powder friction ratio

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Powder Metallurgy Reconditioning of Food and Processing Equipment Components

Cited by 2 publications

References 0 publications

Reconditioning by Welding of Prosthesis Obtained through Additive Manufacturing

Reconditioning by Welding of Prosthesis Obtained through Additive Manufacturing

Tribological Properties of Coatings Obtained with Electrocontact Welding of Metal Powder Materials

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