Degassing process for low-gas-content centrifugal composite roll

Abstract

The invention discloses a degassing process for a low-gas-content centrifugal composite roll. In the process, cone through holes (3) for installing stopper blocks (8) are processed in mounting holes of metal mold hanging handles at both sides of a roll body metal mold (2); after centrifugal casting is completed, the low-gas-content centrifugal composite roll is closed with upper and lower roll necks and casting of a roll heart is completed, the stopper blocks (8) in the cone through holes (3) at both sides of the roll body metal mold (2) are taken out; gas suction joints (10) are arranged; a gas suction pipe of a vacuum pump is connected; the vacuum pump is started to carry out vacuum degassing; and after a casting is cooled, vacuum degassing is stopped, so that most of gas on a working layer of the centrifugal composite roll is removed. According to the invention, gas content of the working layer of the centrifugal composite roll is greatly reduced; mechanical performance of the working layer of the roll is obviously improved; and particularly, plasticity, toughness and contact fatigue resistance of the centrifugal composite roll are improved, so that service life of the centrifugal composite roll, particularly a cold roll, is greatly prolonged.

Description

technical field [0001] The invention relates to the technical field of roll production, in particular to a degassing process for a centrifugal compound roll with low gas content. Background technique [0002] The centrifugal composite roll is a bimetallic roll, that is, the surface layer (working layer) is made of wear-resistant high-alloy material, and the core is made of ductile iron. [0003] The surface layer of the centrifugal composite roll has many alloy elements and high cost, but it can achieve high hardness and high wear resistance. Therefore, the general surface casting method of the roll body is centrifugal casting. After the centrifugal casting is completed, the metal mold of the roll body is combined with the base box (including the lower roll neck) and the riser box (including the upper roll neck), and the roll core is poured to complete the casting of the centrifugal composite roll. During the casting process, the surface layer and core metal of the centrifu...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the degassing problem of the centrifugal compound roll existing in the prior art, the present invention provides a degassing process of the centrifugal compound roll with low air content

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