Gradient-structure hard alloy roll collar and manufacturing process thereof

A gradient structure, hard alloy technology, applied in the manufacture of tools, metal rolling, metal rolling, etc., can solve the problems of rapid expansion of roll rings, cracking, and easy microcracks on the surface of rolling grooves, etc., to reduce production costs , reduce roll breakage rate, good strength effect

Active Publication Date: 2014-05-28
湖南天益高技术材料制造有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007]At present, the cemented carbide roller ring materials mainly include WC / Co cemented carbide, Ti C cemented carbide and steel bonded cemented carbide, and some of them use cast iron internally. Composite roll rings; however, these roll rings are prone to micro-cracks on the surface of the rolling groove and rapidly expand to cause problems such as roll ring fragmentation. Especially in recent years, the international prices of tungsten and cobalt have soared, and tungsten and cobalt are the main raw materials for production. The price of cemented carbide roller rings has also doubled

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  • Gradient-structure hard alloy roll collar and manufacturing process thereof

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Embodiment Construction

[0029] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0030] The gradient structure cemented carbide roll ring includes a roll ring outer layer 1 and a roll ring core 2, the roll ring outer layer 1 is arranged on the outer surface of the roll ring core 2, and the roll ring outer layer 1 is on There is a mutual melting layer 3 between the ring cores 2 .

[0031] 1. Regarding the material selection of the outer layer 1 of the roller ring and the core part 2 of the roller ring:

[0032] The outer layer 1 of the roll ring is made of hard materials, binders and additives, while the core 2 of the roll ring is made of hard materials and binders, and a composition gradient is formed between the outer layer 1 of the roll ring and the core 2 of the roll ring. , that is, the same material with different particle sizes is used, and different materials with different particle s...

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Abstract

The invention discloses a gradient-structure hard alloy roll collar and a manufacturing process of the gradient-structure hard alloy roll collar. A compositional gradient is formed between a roll collar outer layer and a roll collar core. The roll collar outer layer and the roll collar core respectively contain a hard material, a binding material and / or an additive, wherein the hard materials, the binding materials and / or the additives are different in mass content. The hard materials, the binding materials and / or the additives are mixed in a ball-milling mode into roll collar ball-milling mixed materials. The roll collar ball-milling mixed materials are dried, mixed with wax and then dried again. The roll collar outer layer ball-milling mixed material mixed with the wax and the roll collar core ball-milling mixed material mixed with the wax are laid in a layered mode to be loaded, and are subjected to cold press molding to form a roll collar blank. The roll collar blank is subjected to sintering and dewaxing to become hard alloy, and the hard alloy is subjected to thermal treatment to become the hard alloy roll collar. The surface abrasion resistance of the hard alloy roll collar with the compositional gradient is improved remarkably, the service life of the hard alloy roll collar is prolonged by about 15 percent under the same abrasion condition, production cost is reduced, and practical value and promotional value are obvious.

Description

[0001] technical field [0002] The invention relates to a roll ring and its manufacturing process, in particular to a cemented carbide roll ring with a composition gradient and its manufacturing process which is mounted on the roll body when rolling a plate or profile. [0003] Background technique [0004] In the production of high-speed wire rods, cemented carbide roll rings have been better applied in wire rod mills and bar mills due to their advantages such as high hardness and good wear resistance. However, the price of cemented carbide roller rings is relatively high, and the investment is large. In particular, the sharp rise in the prices of tungsten and cobalt has doubled the price of cemented carbide roller rings. Compared with the integral roll ring, the composite roll ring can save a lot of cemented carbide raw materials, and the production cost is much lower than that of the integral roll ring. [0005] Gradient composite cemented carbide roll rings are prepar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B27/03B22F7/06B22F1/00C22C29/00
Inventor 赵勇罗兵辉
Owner 湖南天益高技术材料制造有限公司
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