Publikacje

Abstract:

In the present study, commercial pure titanium (Grade 2) was joined to the stainless steel (X5CrNi18-10) by diffusion bonding using different intermediate materials like aluminum, copper and nickel. The thickness of those filler metals were 100 mu m. The use of intermediate materials to create diffusion bond minimize thermal expansion mismatch, to reduce joining temperature and pressure and to inhibit diffusion of undesired elements to the base materials. However it also can cause formation of numbers of intermetallic phases. The investigation was focused on comparing the wear resistance of the obtained diffusion joints. The microstructure of the joints was investigated using scanning electron microscopy equipped with an energy dispersive X-ray system (EDS) to determine chemical composition of joint. The structures of the joints varied importantly depending on the interlayer. However in the samples obtained by nickel interlayer at the borders of materials were observed Kirkendall voids. Value of friction force and wear resistance of diffusion bonded joints were carried out by block-on-ring frictional pair, preformed on the tribological tester T-05. The study was carried out under conditions of technically dry friction for the concentrated sliding contact loaded with 300 N. Friction distance for each test was 400 m. The results show that the maximum values of friction coefficient and mass loss was obtained for joints with nickel interlayer.

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WEAR RESISTANCE PROPERTIES OF DIFFUSION BONDED JOINTS BETWEEN TITANIUM AND STAINLESS STEEL OBTAINED BY Al, Cu AND Ni INTERMEDIATE MATERIALS