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Surface Treatment for Improving Selected Physical and Functional Properties of Tools and Machine Parts — A Review

Toboła Daniel, Kalisz Janusz, Czechowski Kazimierz, Wronska Iwona, Machynia Zbigniew

Journal of Applied Materials Engineering

2020

Vol. 60, iss. 1

23--36

Wear resistance, which is one of the main technological quality features of machine parts and tools, is determined by the properties of their surface layer. The demand for high-quality products forces manufacturers to use modern structural and tooling materials as well as efficient and cost-effective methods of their treatment. The paper presents the results of research on selected properties of tools made of tool steels and sintered carbides, as well as parts made of aluminum alloy subjected to selected surface treatment processes, such as mechanical (grinding, turning, milling, burnishing) and thermo-chemical (nitriding, sulfonitriding) processes, and physical vapor deposition (PVD) of coatings. The presented results, including analyses of the surface geometric structure, microstructure, and microhardness, as well as tribological and machining properties of selected materials, indicate the possibility of improving the functional quality of tools and machine parts.

The influence of surface topography on selected tribological properties of hardened 100Cr6 steel after turning

Kalisz Janusz, Toboła Daniel

Mechanik

2019

R. 92, nr 11

718--722

Results of surface topography analysis and selected tribological properties of samples of 100Cr6 bearing steel after turning with variable feed are presented. The hardness of samples after heat treatment carried out in a vacuum furnace (including quenching and double tempering) was 60 ±1 HRC. The influence of turning feed on surface topography after machining as well as selected tribological properties were determined. Depending on the surface topography of samples, differences between values of friction coefficients and wear rates were about 25%. Moreover, along with the surface roughness changing, different nature of wear was found.

Przedstawiono wyniki analizy topografii powierzchni oraz wybranych właściwości tribologicznych próbek ze stali łożyskowej 100Cr6 po toczeniu ze zmiennym posuwem. Twardość próbek po obróbce cieplnej, przeprowadzonej w piecu próżniowym (obejmującej hartowanie i dwukrotne odpuszczanie), wynosiła 60 ±1 HRC. Analizowano wybrane parametry chropowatości powierzchni. Określono wpływ posuwu toczenia na topografię powierzchni po obróbce, a także na wybrane właściwości tribologiczne. Różnice między wartościami współczynnika tarcia i zużycia wyniosły ok. 25% w zależności od topografii powierzchni próbek. Ponadto wraz ze zmianą chropowatości powierzchni stwierdzono różny charakter zużycia.