Properties of Carbide Layers Produced by Means of the Powder Method at Low Pressure

Abstract

The paper presents the results of examinations of materials and tribological properties of chromized carbide layers produced on tool steel by means the powder method, modified by the use of low pressure during the process, for the avoidance of the oxidation of the batch. Investigations of the structure of the layers, the topography of the surface of chromized steel samples, their hardness, Young′s modulus, layers adhesion to steel core and tribological properties were conducted. It was proved that the structure and proprieties of chromized carbide layers produced by means of both methods are similar. However, layers produced with the novel vacuum method have greater thicknesses than layers received with the powder method, at the same process parameters (the time and the temperature). This means 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 the steel core.

Microstructure and Resistance to Abrasive and Corrosive Wear of a Chromosiliconized Layer on C45 Steel Substrate

“…The beneficial effect of surface treatment technologies such as chrome plating, hybridization, and laser alloying on the increase in their performance has been presented in the research papers [L. [7][8][9][10][11]. The pack cementation method is a subject of studies in research facilities [L. [12][13]. Due to the obtained results, it will be applied on parts of machines and devices in many branches of industry, e.g., American Company Alon Pressing INC, for the diffusional aluminization of pipes used in chemical systems.…”

Archives of Metallurgy and Materials

“…The traditional powder pack method of diffusion chromizing has been described in detail in, [1,7]. The processes were carried out in an electric furnace, equipped with a temperature control system.…”

“…ammonium chloride), and a ceramic filler (e.g. kaolin) preventing sintering of the powder at high temperature, [5][6][7].…”

“…The chromized carbide layers (the CrC type carbide layer) are formed in the diffusion chromizing process on the surface of steels with a high carbon content. They are usually of small thickness, of the order of between 10 and 20 microns and are characterized by good tribological properties, [8][9][10].…”

Increased durability of selected tools used in the rubber industry by hybrid treatment

“…Chromowanie dyfuzyjne stali narzędziowej X210Cr12 tradycyjną metodą proszkową umożliwiło wytworzenie warstw z węglika chromu typu (Cr, Fe) 7 C 3 , zawierających ślady azotku (Cr, Fe) 2 N, podobnie jak w przypadku innych znanych metod chromowania dyfuzyjnego, w których aktywatorami procesu są halogenki chromu [7][8][9][10][18][19][20]. Grubość warstw węglikowych typu CrC wynosiła ok. 11 μm dla procesów chromowania wykonywanych w czasie 10 godz.…”