COMPOSITE ANTIFRICTION MATERIAL BASED ON WASTEs of ALUMINUM ALLOY FOR items OF POST-PRINTING EQUIPMENT

Abstract

The article analyzes the features of the structure formation, as well as physical, mechanical, and antifriction properties of the new composite material based on grinding wastes of aluminum alloy AD35 intended for operation with liquid lubricant in the air at loads of up to 4.0 MPa and sliding speeds of up to 2.0 m/sec. The results showed that the application of the developed technology for recycling grinding wastes of aluminum alloy AD35 allowed obtaining a composite antifriction material of a homogeneous structure without liquation phenomena. By its physical and mechanical properties, new composite material does not concede to foreign cast alloy AlSi1MgMn but significantly exceeds it by tribological characteristics in similar operating conditions. Studies have shown that utilizing the grinding wastes of AD35 alloy for the production of new antifriction materials on their basis is an important technological method for the efficient recycling of such a valuable source of high-alloy raw materials. For the new antifriction composite material obtained from high-alloy grinding wastes of aluminum alloy AD35, the rational operating ranges were determined, namely, a sliding speed was up to 2.0 m/sec and a load was up to 4.0 MPa with a counterface from steel 45 (45−48 HRC) at operating in the air under lubrication conditions with PEF-240 synthetic oil. The new composite antifriction material can be used in contact joints of folding machines, die-cutting machines, envelope making equipment, and other post-printing machines as an alternative to currently used foreign cast analogues. It was shown the prospect of using reclaimed industrial grinding wastes of aluminum alloys as a basis for obtaining antifriction composite materials for a different operating mode under conditions, when the structure and properties can be controlled by technological methods choosing the chemical composition of grinding wastes and applying the rational manufacturing technological parameters.