High-abrasion-resistant metal ceramic composite roller sleeve and preparation method thereof

Abstract

The invention discloses a high-abrasion-resistant metal ceramic composite roller sleeve and a preparation method thereof and belongs to the technical field of abrasion resistant materials. The high-abrasion-resistant metal ceramic composite roller sleeve comprises a preset inner sleeve and an outer sleeve. The preset inner sleeve is made of common low and medium carbon steel or low alloy steel. Casting materials of the outer sleeve are high-abrasion-resistant alloy and a metal ceramic composite material reinforced block. An inverted-T-shaped stainless steel part is put into the bottom of sintering powder, the tip part, exceeding the metal ceramic composite material reinforced block, of the T shape is inserted into a sand mold according to a specified position, and then high-abrasion-resistant alloy liquid is poured into the part between the metal ceramic composite material reinforced block and the preset inner sleeve. Through subsequent heat treatment, the overall composite performanceis promoted, interface bonding of the obtained composite roller sleeve is good, and holes, segregation, cracks and other macroscopic defects are avoided. According to the preparation method, the preparation process is simple, operation is easy, and industrialized mass production is convenient.

Description

technical field [0001] The invention belongs to the technical field of wear-resistant materials, and in particular relates to a high-wear-resistant metal-ceramic composite roller sleeve and a preparation method thereof. Background technique [0002] Crushing is a basic process widely used in mining, medicine, building materials, machinery, environmental protection, papermaking and many other industries, and plays a vital role in the development of the national economy. High-pressure roller mills and vertical mills are two types of crushing equipment mainly used in the field of wear-resistant technology on the market. After years of research and development, the roll surfaces mainly include wear-resistant alloy roll surfaces and wear-resistant material surfacing rolls. There are four types of surface, hexagonal powder metallurgy roller surface and carbide stud inlaid roller surface. The wear-resistant alloy roll surface is widely used, but there is a problem of insufficient ...

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Problems solved by technology

The wear-resistant alloy roll surface is widely used, but there is a problem of insufficient wear resistance in the actual application process; the production process of the wear-resistant material surfacing roll surface is to weld two layers of different materials on the wear-resistant roller base, which is mostly used for cement In the industry, this kind of roll surface can be used normally after repairing the worn and failed roll surface many times, but cracks are prone to appear at the weld and the interface of the composite layer during use, causing material to fall off; the hexagonal powder metallurgy roll surface is still in the In the experimental stage, the main problem is that the brittleness is relatively large, and it is easy to generate stress concentration and cracks during the crushing process; the cemented carbide stud inlaid roller surface has its relatively advanced and unique design, but the failure of the roller surface is mostly due to the failure of the matrix material. The wear resistance and compressive strength are not enough, so the selection of the base roll surface material is the key to further improve its performance and life

Usually, a single material is difficult to meet the requirements, so a bimetal with high wear resistance and good toughness is used for composite casting, and a centrifugal casting method is used to produce a metal roll that is both wear-resistant and fracture-resistant, which can be used in large quantities. The wear resistance of the material is greatly improved, but the wear-resistant roller sleeve prepared by this method has metallurgical bonding problems, and holes and cracks are prone to exist on the joint surface, which greatly reduces the service life of the composite roller sleeve; at the same time, this preparation method There are problems of high cost of centrifugal casting equipment and complicated technical process

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