Glue-jointed hardalloy composite roller ring

Abstract

The present invention relates to a bonded hard alloy composite roll ring. It includes an iron base roll ring seat which can be fixed on the roll shaft, on said iron base roll ring seat a hard alloy ring is bonded, and on the iron base roll ring seat of the hard alloy ring one side a copper end surface ring also is fixedly connected; the described copper end surface ring is respectively bonded with iron base roll ring seat and adjacent hard alloy ring end surface, and mutually fixedly connected with said iron base roll ring seat by means of fixing bolt; and the described bonding adopts inorganic adhesive or organic adhesive, and at least is formed into a layer of bonding layer.

Description

technical field [0001] The invention relates to a cemented carbide composite roll ring specially used for metal pressure processing, especially a cemented carbide composite roll ring used for small-sized material rolling mills such as bars. Background technique [0002] Cemented carbide rolls have the advantages of excellent wear resistance, corrosion resistance and single groove rolling life, which can significantly improve production efficiency and product quality, and have received more and more attention. For example, in the high-line finishing and pre-finishing stands, the integral cemented carbide roll composed of a cemented carbide roll ring and a roll shaft has been widely used. However, such solid carbide rolls are not suitable in terms of performance or economy for small bar mills such as larger bars that are required to withstand larger rolling loads and rolling torques. . [0003] In order to solve the problem of the application of cemented carbide in small sec...

AI Technical Summary

Problems solved by technology

Although these metallurgical composite roller rings have the advantages of high bonding strength of the inner and outer rings, good temperature resistance, and can reduce the cost of cemented carbide, the process is complicated, and due to the high temperature manufacturing, there may also be a decrease in the performance of the cemented carbide, and the bonding layer may be damaged. Various stress defects caused by different thermal expansion rates

[0005] Bonding and compounding can avoid the above-mentioned shortcoming of metallurgical compounding, but there are some shortcomings in the existing bonding and compounding process, as disclosed in CN1513617 "hard alloy composite roll", the roll shaft containing the protruding part is directly bonded with the cemented carbide roll ring to form a Composite roll technology, CN1389320 "Manufacturing process of a composite bonded hard alloy roll" discloses an adhesive compound process for the roll shaft, hard alloy roll ring and retaining ring treated with electrochemical film formation; these two integral When the bonded composite roll is applied to the occasion of high rolling force and rolling torque, the thickness of the hard alloy roll ring is required to increase correspondingly in order to improve the impact resistance, thereby increasing the cost of expensive hard alloy, and at the same time disassembly and transportation. No aspect; Another kind of cemented carbide / steel compound that is disclosed in CN1597161 "The Production Method of Carbide Composite Roller Ring" is solidified at 80-400 ℃ with copper oxide+phosphoric acid inorganic glue, and opens R1 keyway on the composite surface. For roller rings, the processing cost and difficulty of dense keyways are high, and when the application is subjected to high rolling force and rolling torque, the adhesive layer may loosen and cause the keyway to break.

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