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Hard alloy composite roll

A cemented carbide, composite roll technology, applied in the direction of roll, metal rolling, metal rolling, etc., can solve the problem of frequent slot change, and achieve the effect of increasing the output of the rolling mill, improving the effective operation rate, and improving the wear resistance.

Inactive Publication Date: 2011-02-09
ZHEJIANG HENGCHENG CEMENTED CARBIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The finished product and the front roll of the finished product are all centrifugal composite cast needle-shaped ductile iron rolls, the hardness of the roll surface is 74-78HSD, and the single-slot rolling capacity of small-sized finished products is only about 120 tons, and the slots are changed frequently.

Method used

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Embodiment Construction

[0010] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0011] figure 1 Shown is the cemented carbide composite roll of the present invention, including a mandrel 1 and more than two roll rings 2, the roll rings 2 are sleeved on the mandrel 1, and the roll rings 2 are tungsten carbide cemented carbide For the roller ring, the mandrel 1 is made of ductile alloy steel. The tough alloy steel is 42CrMo or 40Cr or 40CrMo.

[0012] The roll ring 2 is in interference connection with the mandrel 1, and is manufactured into a combined bar mill finishing roll by a mechanical combination method. The cemented carbide composite roll hardness: 78 ~ 80HRA, specific gravity: 12.6 ~ 13.2kg / m 3 , bending strength ≥ 2000N / mm 2 . The maximum diameter of the roller ring is 470mm, and the scrapped diameter is 350mm.

[0013] Tungsten carbide cemented carbide has the characteristics of good thermal conductivity (...

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Abstract

The invention discloses a hard alloy composite roll. The hard alloy composite roll comprises a mandrel and more than two roll collars, wherein the roll collars are sleeved on the mandrel and are made of tungsten carbide hard alloy; and the mandrel is made of tough alloy steel. Due to the adoption of the technical scheme, the hard alloy roll collars replace the original spicule nodular cast iron roll, and the tungsten carbide hard alloy roll collars are applied, the abrasive resistance of the roll is high, and the service life is long, so that the effective operation rate is improved; therefore, the yield of rolling mills is improved.

Description

technical field [0001] The invention relates to a cemented carbide composite roller. Background technique [0002] The main performance indicators of the roll are the strength of the mandrel and the toughness and wear resistance of the working layer of the roll ring. The performance requirements for the finishing stand rolls of bar mills are mainly wear resistance and toughness, taking into account thermal cracking resistance and strength. The finished product and the pre-finished roll are all centrifugal composite cast needle-shaped ductile iron rolls, the hardness of the roll surface is 74-78HSD, the single-slot rolling capacity of small-sized finished products is only about 120 tons, and the slots are changed frequently. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a cemented carbide composite roll, which can improve the wear resistance of the finishing roll. [0004] In order to solve the above-mentioned...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B27/03
Inventor 吴晓娜饶国辉郭伟波严迪科
Owner ZHEJIANG HENGCHENG CEMENTED CARBIDE
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