Preparation method of ZTA particle enhanced steel-based composite grinding roller based on chemical activation treatment

A technology of activation treatment and particle enhancement, applied in the field of wear-resistant material preparation, can solve the problems of poor bonding between ZTA particles and iron base, enhancement, and inability of ZTA ceramic particles to play a role, so as to enhance interface bonding and improve wear resistance. , the effect of improving the bonding strength

Active Publication Date: 2017-05-31
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the binding between ZTA particles and iron matrix is ​​poor, and the combination of ZTA ceramic particles and iron matrix in the composite material prepared by casting infiltration method is a mechanical combination, so that ZTA ceramic particles cannot play the role of reinforcement.

Method used

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  • Preparation method of ZTA particle enhanced steel-based composite grinding roller based on chemical activation treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: Grinding roller of column mill

[0026] 1) Mix titanium powder and inorganic salt, add ZTA particles and stir evenly to carry out high-temperature salt bath plating. The temperature of high-temperature salt bath is 750 ° C, and keep warm for 15 minutes to obtain a uniform coating; wherein, the mass ratio of titanium powder to inorganic salt is 10%, The mass fraction of ZTA ceramic particles in salt bath plating is 80%.

[0027] 2) Put the titanium-plated ZTA particles into the chemical plating solution, stir with a magnetic stirrer and heat to 70°C for 2 hours to obtain a nickel layer;

[0028] 3) Sinter the coated ZTA particles, raise the temperature from room temperature to 1200°C at a heating rate of 10-15°C / min, then raise the temperature to 1400°C at a heating rate of 5-8°C / min and sinter for 1 hour, then cool with the furnace , ZTA particles are interconnected to form a pore-like prefabricated body;

[0029] 4) Fix the prefabricated body in the san...

Embodiment 2

[0030] Embodiment 2: Cone type grinding roller

[0031] 1) Mix titanium powder and inorganic salt, add ZTA particles and stir evenly to perform high-temperature salt bath plating. The temperature of the high-temperature salt bath is 800° C., and keep warm for 30 minutes to obtain a uniform coating; wherein, the mass ratio of titanium powder to inorganic salt is 14%, The mass fraction of ZTA ceramic particles in salt bath plating is 75%.

[0032] 2) Put the titanium-plated ZTA particles into the chemical plating solution, stir with a magnetic stirrer and heat to 75°C for 4 hours to obtain a nickel layer;

[0033] 3) Sinter the coated ZTA particles, raise the temperature from room temperature to 1200°C at a heating rate of 10-15°C / min, then raise the temperature to 1400°C at a heating rate of 5-8°C / min and sinter for 1 hour, then cool with the furnace , ZTA particles are interconnected to form a pore-like prefabricated body;

[0034] 4) The prefabricated body is fixed in the s...

Embodiment 3

[0035] Embodiment 3: tire type grinding roller

[0036] 1) Mix titanium powder and inorganic salt, add ZTA particles and stir evenly to carry out high-temperature salt bath plating. The temperature of high-temperature salt bath is 800° C., and keep warm for 45 minutes to obtain a uniform coating; wherein, the mass ratio of titanium powder to inorganic salt is 15%, The mass fraction of ZTA ceramic particles in salt bath plating is 65%;

[0037] 2) Put the titanium-plated ZTA particles into the chemical plating solution, use a magnetic stirrer, stir and heat to 85°C for 6 hours to obtain a nickel layer;

[0038] 3) Sinter the coated ZTA particles, raise the temperature from room temperature to 1200°C at a rate of 10-15°C / min, and then increase the rate of temperature to 1400°C at a rate of 5-8°C / min for sintering for 1 hour, then cool with the furnace , ZTA particles are interconnected into a pore-like prefabricated body.

[0039] 4) The prefabricated body is fixed in the sand...

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Abstract

The invention discloses a preparation method of a ZTA particle enhanced steel-based composite grinding roller based on chemical activation treatment. The preparation method comprises the following steps: (1) carrying out high temperature salt-bath plating on ZTA particles, and obtaining uniform titanium plated layers on the surfaces of the ZTA particles; (2) forming nickel layers at the peripheries of the titanium plated layers; (3) sintering the plated ZTA particles, and mutually connecting the ZTA particles to form a porous prefabricated part; and (4) fixing the prefabricated part on the end surface or the working surface of a cast, pouring a steel base material metal solution through a casting-penetrating process, and carrying out cooling to obtain the ZTA particle enhanced steel-based composite grinding roller. During the salt-bath titanium plating, titanium and the surfaces of the ZTA ceramic particles form metallurgical bonding, so that the interfacial bonding property between the titanium layers and the ZTA ceramic particles is enhanced. The ZTA ceramic particles subjected to the salt-bath titanium plating is then subjected to chemical nickel plating, and a titanium-nickel alloy can be generated at a titanium-nickel bonding part; and the titanium-nickel alloy layers achieve the effect of a flexible transitional layer between a metal base body and the ZTA particles, so that the bonding strength of the interface is greatly enhanced.

Description

technical field [0001] The invention belongs to the field of preparation of wear-resistant materials, and in particular relates to a preparation method of ZTA particle-reinforced steel-based composite grinding rollers. Background technique [0002] Column mills are widely used in limestone powder making in power plants, ultra-fine crushing of iron ore and metal ores, gypsum non-metallic ore powder making, phosphate rock grinding, etc. It adopts the principle of continuous and repeated medium-pressure roller milling. During use, the upper part of the column mill rotates, driving the main shaft to rotate, so that the rollers rotate in the ring-shaped inner lining, and the materials are crushed by the rollers to form powder. Therefore, the grinding roller is the part that bears the main wear in the equipment, and is one of the key components that determine the service performance of the equipment, so there are strict requirements for material selection and preparation. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D23/04C23C28/02C22C33/04
CPCC22C33/006C22C33/04C23C28/023B22D23/04
Inventor 李烨飞袁鹤鹤高义民皇志富陈志霍旭旭郑巧玲
Owner XI AN JIAOTONG UNIV
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