Al-Sn nanostructured coatings on aluminum surfaces using electrospark alloying and their wear behawior

At electrspark alloying (ESA) of aluminum surfaces using Al-Sn tool-electrode (TE), nanostructuring of manufactured surfaces take place owing to the formation of SnO2 nanofibers. Examining the tribological properties of these surfaces in a friction couple with a counterbody made of hardened steel showed that the wear of counterbody during the friction in the oil and at dry friction exceeds by an order of magnitude and above it the wear of such surfaces

Tribological Properties of Combined Molybdenum Coatings Formed by Electric-Spark Alloying on Stainless Steel

To improve the operational properties of the parts of machines made of quenched stainless steel 30X13, the surface were hardened by electric-spark alloying (ESA) with combined coatings (molybdenum + chromium and molybdenum + bronze). The results of investigations showed the correlation between the wear resistance of coatings and their hardness. It has been noted that the roughness of all alloyed coatings after tribological tests lowered, while the roughness of unalloyed surface of steel 30X13 increased. The smallest coefficient of friction has been established for samples alloyed with the molybdenum + bronze combined coatingVytauto Didžiojo universitetasŽemės ūkio akademij

Increasing wear resistance of 30x13 stainless steel by electrospark alloying

In this work were studied the tribological properties of coatings of molybdenum, silver, chrome + molybdenum, molybdenum + BrOF6.5-0.15, obtained by electrospark alloying method on 30X13stainless steel. At the load of 200 N was established dependence between the coating wear and its hardness, the higher the hardness, the smaller is the wear of the coating and vice versa. The volumetric wear of the coatings at a load of 100 N increases in the direction of Мо=Cr + Mo → Steel 45 → Mo + BrОF6.5-0.15 → Ag, and at a load of 200 N increases in the direction of Мо→Cr + Mo → Steel 45 → Mo + BrОF6.5-0.15 → Ag. At all loads, the combination coatings made of chromium + molybdenum (f≈0.08) had the highest friction coefficient (f≈0.08), and the combination coatings made of Mo + BrОF6.5-0.15 had the lowest ones (f≈0.043-0.046)Vytauto Didžiojo universitetasŽemės ūkio akademij

Wear behavior of electrospark coatings on steel

Studies of the tribological properties of electrospark coatings on steel 45 prepared by processing with electrodes made of chromium, molybdenum, BrOF6.5-0.15 grade bronze, and a T15K6 hard alloy are described. The studies were conducted in a cell according to three test patterns using and cutting fluid and MGE-46V hydraulic oil under different loads. The first-pattern tribological tests showed that the chromium coating is the most wear-resistant (U = 0.7 mg) and the coating of BrOF6.5-0.15 grade bronze exhibits the lowest antiwear properties (U = 4.7 mg). The second-pattern wear tests also revealed that the highest and lowest wear resistance is exhibited by the chromium coating (U = 0.4 mg) and the BrOF6.5-0.15 bronze coating, respectively. According to the third-pattern tests, the highest wear resistance was found for a composite coating of a T15K6 hard alloy + BrOF6.5-0.15 bronze (U = 0.8 mg), while the lowest antiwear properties were exhibited by the BrOF6.5-0.15 bronze coating (U = 6 mg)Vytauto Didžiojo universitetasŽemės ūkio akademij

Iimprovement of the tribological properties of stainless steel 04X18H10 by electrospark alloys

Vytauto Didžiojo universitetasŽemės ūkio akademij