Roll sleeve of ultra-strong wear-resistant high alloy steel roll squeezer and manufacturing method roll sleeve

Abstract

The invention relates to a roll sleeve of an ultra-strong wear-resistant high alloy steel roll squeezer and a manufacturing method of the roll sleeve, belonging to the technical field of casting in building material industry. The technical scheme is as follows: an outer layer adopts ultra-strong wear-resistant high alloy steel, an inner layer is formed by compounding low-carbon medium alloy steel, and the roll sleeve is manufactured through the process steps of melting the outer-layer ultra-strong wear-resistant high alloy steel, melting the inner-layer low-carbon medium alloy steel, centrifugally casting the compound roll sleeve and performing heat treatment on the compound roll sleeve. The roll sleeve and the manufacturing method thereof, disclosed by the invention, have the positive effects that: the preferential mixture ratio of the inner-layer material to the outer-layer material of the roll sleeve is adopted and a reasonable centrifugal compound casting process is adopted, thereby the inner layer and the outer layer are subjected to metallurgical bonding and a good bonding state is achieved. According to the characteristics of high alloy of the roll sleeve, the fracture toughness of the roll sleeve is enhanced by raising tempering temperature and performing multiple tempering processes. The outer layer of the roll sleeve disclosed by the invention has the hardness of 60-64HRC and the impact toughness of 12J / cm<2>, the inner layer has the hardness of 26-30HRC, the tensile strength of 800-900MPa and the yield strength of 730MPa, and the service life of the roll sleeve is prolonged by above 2 times in comparison with the traditional roll sleeve formed by forging and overlaying welding.

Description

technical field [0001] The invention relates to a super wear-resistant high-alloy steel roller press roll cover and a manufacturing method thereof, in particular to a centrifugal casting super wear-resistant high-alloy steel / low-alloy steel roll press roll cover and a manufacturing method thereof, belonging to the building materials industry casting technology field. Background technique [0002] At present, the roll sleeves of the roller press are mainly made of forgings, and a wear-resistant layer is surfacing on the surface to improve its wear resistance. However, due to the repeated cutting and wear of the roller sleeve by the material during crushing and crushing, and the periodic alternating pressure and repeated wear caused by the huge pressure in the work, the surface of the roller sleeve produces grooves and convex edges, and the surface surfacing layer is very easy There are cracks and meat loss, which will damage the parts faster, shorten the service life, an...

AI Technical Summary

Problems solved by technology

However, due to the repeated cutting and wear of the roller sleeve by the material during crushing and crushing, and the periodic alternating pressure and repeated wear caused by the huge pressure in the work, the surface of the roller sleeve has grooves and convex edges, and the surface surfacing layer is very easy There are cracks and meat loss, which will damage the parts faster, shorten the service life, and require multiple surfacing welding repairs. Due to the limitations of the production site and many other factors, the surfacing welding is difficult to meet the standard requirements, which seriously affects the roller press. Efficiency