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A preparation method of a honeycomb ceramic-metal composite vertical mill roller

A technology of metal composite materials and honeycomb ceramics, which is applied in the field of preparation of honeycomb ceramic-metal composite vertical grinding rollers, can solve the problems of delamination, easy occurrence of defects, brittle fracture of grinding rollers, etc., so as to reduce production costs and avoid The effect of crack initiation and yield improvement

Active Publication Date: 2017-05-31
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the centrifugal casting process is complicated. During the heat treatment process, the thermal conductivity and expansion coefficient of high-chromium cast iron and nodular cast iron are very different. Only the interface of metallurgical bonding is easy to produce defects, and the grinding roller is prone to brittle fracture and delamination.

Method used

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  • A preparation method of a honeycomb ceramic-metal composite vertical mill roller
  • A preparation method of a honeycomb ceramic-metal composite vertical mill roller
  • A preparation method of a honeycomb ceramic-metal composite vertical mill roller

Examples

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Effect test

Embodiment 1

[0046] The preparation method of the honeycomb ceramic-metal composite vertical mill roller, its specific steps are as follows:

[0047] Step 1. Preparation of honeycomb porous ceramic prefabricated body: First, mix ceramic particles, pore-forming agent and binder at a ratio of 100:3:15 and add them evenly into the mold to prepare a honeycomb porous prefabricated body, then raise the temperature to 500°C for 2 hours The pore-forming agent in the porous ceramic preform is exerted to obtain a honeycomb porous ceramic preform, and the structure diagram of the honeycomb porous ceramic preform is as follows image 3 Shown; wherein the ceramic particles are zirconium corundum, the particle size is 2mm; the pore-forming agent is polyoxymethylene, the particle size is 0.5mm; the binder is a mixture of aluminate cement and silica sol with a mass ratio of 5:10;

[0048] Step 2. Prepare a honeycomb ceramic-metal composite wear-resistant insert from the honeycomb porous ceramic preform in...

Embodiment 2

[0061] The preparation method of the honeycomb ceramic-metal composite vertical mill roller, its specific steps are as follows:

[0062] Step 1. Preparation of honeycomb porous ceramic prefabricated body: First, mix ceramic particles, pore-forming agent and binder at a ratio of 100:3:15 and add them evenly into the mold to prepare a honeycomb porous prefabricated body, then raise the temperature to 500°C for 2 hours The pore-forming agent in the porous ceramic preform is exerted to obtain a honeycomb porous ceramic preform, and the structure diagram of the honeycomb porous ceramic preform is as follows image 3 Shown; wherein the ceramic particles are zirconium corundum, the particle size is 2mm; the pore-forming agent is polyoxymethylene, the particle size is 0.5mm; the binder is a mixture of aluminate cement and silica sol with a mass ratio of 5:10;

[0063] Step 2. Prepare a honeycomb ceramic-metal composite wear-resistant insert from the honeycomb porous ceramic preform in...

Embodiment 3

[0076] The preparation method of the honeycomb ceramic-metal composite vertical mill roller, its specific steps are as follows:

[0077] Step 1. Preparation of honeycomb porous ceramic prefabricated body: Firstly, ceramic particles, pore-forming agent and binder are mixed evenly at a ratio of 100:1:.6 and added into the mold to prepare a honeycomb porous prefabricated body. The structure diagram of the honeycomb porous ceramic prefabricated body is as follows image 3 As shown, then heat up to 300°C for 2 hours to develop the pore-forming agent in the honeycomb porous ceramic preform to obtain a honeycomb porous ceramic preform; wherein the ceramic particles are titanium carbide with a particle size of 1mm; the pore-former is polystyrene with a particle size of 0.5mm; the binder is a mixture of sodium silicate and distilled water with a mass ratio of 5:1;

[0078] Step 2. Prepare a honeycomb ceramic-metal composite wear-resistant insert from the honeycomb porous ceramic prefor...

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Abstract

The invention relates to a method for manufacturing a cellular ceramic-metal composite vertical mill roller and belongs to the technical field of metal-matrix composites. The method comprises the steps that firstly, a cellular porous ceramic preform is manufactured and then made into a cellular ceramic-metal composite wear-resisting insert, wherein the cellular ceramic-metal composite wear-resisting insert is provided with clearance ribs, insert holes and insert columns; heat treatment is conducted on the cellular ceramic-metal composite wear-resisting insert, the outer surfaces of the insert holes and the insert columns are coated with fireproof coatings, and the insert columns of the wear-resisting insert are inserted into the insert holes in pair, so that the wear-resisting inserts are firmly spliced; the cellular ceramic-metal composite wear-resisting insert is placed in a vertical mill roller sand mould, molten tough metal is poured, after the molten tough metal is solidified completely, the composite vertical mill roller is formed, overall heat treatment is conducted on the composite vertical mill roller, and then the cellular ceramic-metal composite vertical mill roller is obtained. According to the method, the wear-resisting composite insert does not need an external clamp, it is only required that insert columns are inserted into the insert holes and can be firmly spliced.

Description

technical field [0001] The invention relates to a method for preparing a honeycomb ceramic-metal composite material vertical mill roller, belonging to the technical field of metal matrix composite materials. Background technique [0002] As a new type of wear-resistant composite material, honeycomb ceramic-metal composite material shows excellent performance in modern industrial production applications, and is gradually replacing traditional metal wear-resistant materials, such as high manganese steel, high chromium cast iron, etc. It is suitable for cement, mining, metallurgy, power station or various similar industries. At present, honeycomb ceramic-metal composite materials are mainly used in composite grinding rollers, grinding discs, liners and other products, and these products need to be obtained through a reasonable heat treatment process. The comprehensive performance requires the product to have both high wear resistance and toughness. The composition of the honey...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D23/04C21D1/18C21D6/04B02C4/30
Inventor 蒋业华温放放刘光亮卢德宏李祖来山泉周谟金周荣
Owner KUNMING UNIV OF SCI & TECH
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