Hard alloy composite roll collar for high-speed wire production line and method for manufacturing the same

Abstract

The invention relates to a high-liner rigid alloy compound roll collar, which comprises a base and a compound working layer whose material brand is different to the base while they are sintered into one whole. The producing method comprises: filling the base and the rigid alloy powder of non-doping molding agent into graphite mould; via vibration, they are filled into special middle-frequency hydraulic vibrating sintering device to be thermally compressed and sintered; and processing second positive pressure sintering; checking the quality and grinding to attain the final product. The invention can improve the rigidity of working layer and the friction resistance; improve the rolling amount of roll collar and the service life, while the waste roll collar can be recycled to save metallic resource. It can apply the finisher of high-speed producing line whose rolling speed reaches 100m / s.

Description

technical field [0001] The invention relates to a roll ring for a finishing mill suitable for a high-speed wire rolling production line and a manufacturing process thereof, belonging to the technical field of cemented carbide powder metallurgy. Background technique [0002] Existing primary roller rings such as figure 1 As shown, after the user unit opens a groove for rolling wire rod on the outer circle of the roll ring according to the production needs, it is installed on the finishing rolling unit (more than a dozen shelves) and used in pairs. During production, due to high temperature, high speed and high pressure, the roller ring is worn, and the roller ring should be frequently ground off-line to grind the groove shape and outer diameter. When the outer diameter is ground to the specified size (more than ten times of grinding, the weight will be reduced by about 30%) .The continuous service life is about 60 days) and it will be scrapped offline, see attached figure ...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings that the existing roller rings cannot meet the requirements of hardness and wear resistance of the working layer and the existing production technology cannot realize the recycling of scrapped roller rings, the purpose of the present invention is to provide a high-strength hard roller ring. Alloy composite roll ring and its manufacturing method. The high-wire cemented carbide composite roll ring can realize softness inside and rigid outside, that is, the material hardness, density and wear resistance of the working layer are higher than those of the base body, thereby increasing the rolling capacity of the roll ring and service life

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