Wyniki wyszukiwania - Biblioteka Nauki

Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl

Ograniczanie wyników

3 1998

Znaleziono wyników: 3

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: carbide coating

Sortuj według:

Ogranicz wyniki do:

Fretting analysis of modulated TiC/VC multilayers on M2 HSS steels.

100%

Fouvry S. , Kapsa P. , Vincent L. , Wendler B. , Kula P.

tom R. XIX, nr 4

990-993

Resistance to fretting wear has been widely studied the last two decades. It has been shown that single TiN coatings on M2 HSS steels reduce the fretting damage about one order of magnitude and it is expected on the basis of theoretical considerations that hard multilayer coatings should present still greater resistance to wear. In the present paper hard modulated TiC/VC carbide multilayer coatings with lambda = 40 nm on M2 HSS steel substrate have been submitted to the fretting wear and the results have been compared with those for single TiC coating and for the M2 HSS substrate itself. The carbide coatings have been deposited with use of an indirect method invented in the Technical University of Łódź, Poland, the fretting tests have been performed in the Laboratory of Tribology and of Dynamic Systems of the Ecole Centrale in Lyon, France, and the results have been elaborated according to the new methodology developed in the latter. It turned out that the fretting wear of the multilayer coating was 25 times less than that of the M2 substrate, much less than that of the single TiC coating and 2.5 times less than that of the commercial TiN coating on the same steel.

The influence of thermal treatment on structure and properties of plasma sprayed oxide and carbide coatings.

100%

Nitkiewicz Z. , Iwaszko J.

tom R. XIX, nr 4

1077-1080

This paper presents the results of the investigations of oxide (Cr2O3, Al2O3, ZrO2) and carbide (Cr3C2, W2C) coatings as applied onto the steel substrate by the plasma spraying method and subsequently remelted. Diverse methods of remelting were used in the experiments - the single and repeated treatments with the continuous microplasma arc, the impulsive remelting technique and TIG method. The coatings were examined both prior to, and after the thermal treatment with the use of light an scanning microscopy, X-ray structural analysis, and the measurements of surface roughness. A reduction of surface roughness, an increase in intensities of diffraction lines and a densification of ceramic and bond layers as a result of reduction of porosity and voids, were observed.

Structure and properties of modulated TiC/VC carbide coatings on HSS steels.

88%

Wendler B. , Jakubowski K. , Heger D.

tom R. XIX, nr 4

994-997

Ultra fine grained and nanostructured materials belong to a new group of materials which can provide better performance of products in numerous industrial branches, in particular in tool industry and in machine construction. Modulated, multilayer coatings belong to the new group as well. In the work the TiC/VC multilayer carbide coatings on M2 and ASP2023 HSS steels are presented with the apparent modulation parameter lambda = 40nm, 200nm, 800nm and 4 mum. The reference to the single TiC and VC coatings is given as well. The coatings have been deposited by means of an indirect method elaborated in the Technical University of Łódź. The results of primary investigations of the structure, texture, morphology, grain size, chemical composition, microhardness and adhesion of the coatings to the HSS substrate as well as some remarks concerning nucleation and growth of the TiC and VC phases are given in the work.