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Abrasion-resistant corrosion-resistant material and process for preparing the same

A corrosion-resistant material and formula technology, applied in the field of wear-resistant and corrosion-resistant materials, can solve the problems of complex process, easy reaction, difficult control of particle distribution uniformity, etc., to achieve uniform particle distribution, high wear resistance, wear resistance Excellent performance

Inactive Publication Date: 2006-02-22
UNIV OF SCI & TECH BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But these methods all have certain deficiencies, such as casting infiltration method, spray dispersion method and other complex processes and difficult to control the thickness of the composite layer; the main problem of casting method is that the reaction between liquid metal and particles is easy to occur, and the uniformity of particle distribution is difficult. control; while the in situ synthesis method faces problems such as how to suppress the formation of unwanted reactants and control the volume fraction of reinforcing particles
It is worth noting that although these methods have been successful in the preparation of some wear-resistant composite materials, there is still a certain distance from the scale of popularization and application, and further improvement is needed [Feng Keqin et al. Preparation technology and prospects of iron-based composite materials .Mechanical Engineering Materials, 2002, 26(12):9-13]

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: 316L / Y-PSZ composite material, the material ratio is: 316L / Y-PSZ mixed powder 95wt% (including 316L stainless steel powder 37.9wt%, Y-PSZ powder 62.1wt%), binder 5wt% (Among them HPMC 5wt%, water 95wt%). The viscous powder is sealed and bandaged and stored at room temperature for 48 hours; then it is pressed in a mold at a speed of 1mm / min. After reaching a pressure of 300MPa, it is kept for 1 minute; the pressed preform is placed in a heat treatment furnace at 10°C The temperature is increased to 100°C at a rate of 1 minute, and the temperature is kept for 5 hours, and then the temperature is increased to 450°C at a rate of 8°C / minute, and the temperature is kept for 8 hours; 6.65×10 -2 Pa, heat up to 1000°C at a rate of 10°C / min, then heat up to 1350°C at a rate of 5°C / min, hold for 2.5 hours, then cool down to 1000°C at a rate of 5°C / min, and then at a rate of 10°C / min The temperature is lowered to 800°C at a rate of, and then cooled with the furnace.

Embodiment 2

[0022] Example 2: 316L / Y-PSZ composite material, the material ratio is: 316L / Y-PSZ mixed powder 92wt% (including 316L stainless steel powder 58.7wt%, Y-PSZ powder 41.2wt%), binder 8wt% (Among them HPMC 10wt%, water 90wt%). The viscous powder is sealed and bandaged and stored at room temperature for 24 hours; then it is pressed in a mold at a speed of 1mm / min. After reaching a pressure of 300MPa, the pressure is kept for 5 minutes; the pressed preform is placed in a heat treatment furnace at 5°C The temperature is increased to 110°C per minute for 2 hours, and then the temperature is increased to 450°C at a rate of 8°C / minute for 6 hours; the degreased body is heated to 500°C in the vacuum sintering furnace with the vacuum evacuated to 6.65×10 -2 pa, at a rate of 10°C / min to 1100°C, then at a rate of 5°C / min to 1300°C, keep it for 3 hours, then at a rate of 5°C / min to 1000°C, and then at a rate of 10°C / min The temperature is lowered to 800°C at a rate of, and then cooled with the f...

Embodiment 3

[0023] Example 3: 316L / Y-PSZ composite material, the material ratio is: 316L / Y-PSZ mixed powder 93wt% (including 316L stainless steel powder 48.7wt%, Y-PSZ powder 51.3wt%), binder 7wt% (Among them HPMC 7wt%, water 93wt%). The viscous powder is sealed and bandaged and stored at room temperature for 36 hours; then it is pressed in a mold at a speed of 2mm / min. After reaching a pressure of 400MPa, it is kept for 2 minutes; the pressed body is placed in a heat treatment furnace at 8°C The temperature is increased to 120°C per minute and the temperature is kept for 3 hours, and then the temperature is raised to 500°C and the temperature is 6 hours at a rate of 10°C / min. The degreased body is heated to 500°C in the sintering furnace where the air pressure reaches 14Pa. The temperature is increased to 1000°C at a rate of 10°C / min, and then to 1350°C at a rate of 5°C / min. The temperature is kept for 1.5 hours, and then filled with inert gas for 10 minutes until the pressure reaches 9MPa. ...

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PUM

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Abstract

The invention relates a method for preparation of abrasion-resistance and corrosion-resistant material, included in abrasion resistance and corrosion-resistant material field. The new type abrasion-resistance and corrosion-resistant material is made by powder metallurgic method with the raw material of 316L non-corrodible steel powder and Y203 partial stabilisation zircite powder. The components of the material are following: 30-80wt% 316L non-corrodible steel powder, 70-20wt% Y-PSZ powder. The method comprises the following steps: mixing the raw materials in proportion; chill-pressing and shaping the mixing powder; heat degreasing the green compact; then sintering and molding the billet body in the condition of vacuum or inactive gas. The invention has the advantages of simple technology, low cost and high abrasion resistance and corrosion resistance. The invention can be extensively used in energy engineering, energy engineering, chemical and chemical industry, metallurgy, aviation and other fields to make abrasion-resistance and corrosion-resistant material.

Description

Technical field [0001] The invention belongs to the field of wear-resistant and corrosion-resistant materials, and particularly provides a 316L / Y-PSZ wear-resistant and corrosion-resistant material and a preparation method thereof. Background technique [0002] With the rapid development of science and technology and the national economy, the mechanical, chemical, metallurgical and other fields have higher and higher requirements for wear-resistant and corrosion-resistant materials, and the service life of production equipment has increasingly become an important factor affecting production efficiency. However, traditional wear-resistant materials have gradually been unable to meet the requirements of application conditions. Therefore, in terms of application research, metal-ceramic composite materials, engineering ceramic materials and organic materials have developed rapidly. Metal-ceramic composite materials with excellent comprehensive performance and low prices are the solut...

Claims

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Application Information

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IPC IPC(8): C22C45/02C22C33/02
Inventor 谢建新张文泉刘雪峰郭振文
Owner UNIV OF SCI & TECH BEIJING
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