TRIBOLOGICAL CHARACTERIZATIONS OF CHROMIZED CARBIDE LAYERS PRODUCED BY THE PACK POWDER METHOD AT LOW PRESSURE
Journal Title: Tribologia - Year 2015, Vol 261, Issue 3
Abstract
Diffusion chromizing of tool steel was investigated using a powder method modified by the use of low pressure during the process for the avoidance of the oxidation of the batch. The processes were performed in a chromium chloride atmosphere at a low-pressure range from 1 to 800 hPa, and the treatment temperature was 830°C. Studies of layers structure, its phase composition, concentration depth profiles of elements in the diffusion zone of chromized layer and their tribological properties were conducted. A comparison was made between the layer thickness produced on the tool steel surface using the novel vacuum method and a traditional pack powder method. It proved that, with the novel vacuum method, one could produce layers at lower temperatures than is possible by means of the traditional pack powder method, which has an essential meaning from the point of view of mechanical proprieties of steel core. The high wear resistance of chromized carbide layers produced by the vacuum method verified.<br/><br/>
Authors and Affiliations
Bogdan BOGDAŃSKI, Ewa KASPRZYCKA, Paweł KRAŚNIEWSKI
Keywords
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