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A high-throughput method for the preparation of gravity-impregnated composite liners

A composite liner, high-throughput technology, used in metal processing equipment, transportation and packaging, coating, etc., to achieve the effect of improving efficiency

Active Publication Date: 2022-04-22
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the wear resistance of the single-material liner in active service cannot meet the requirements for the wear performance of the liner under severe working conditions. Significantly improve the wear resistance of the liner surface

Method used

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  • A high-throughput method for the preparation of gravity-impregnated composite liners
  • A high-throughput method for the preparation of gravity-impregnated composite liners

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preparation example Construction

[0036] A high-throughput preparation method of a gravity impregnation composite liner of the present invention comprises the following steps:

[0037] S1. Surface modification of zirconia-toughened alumina ceramic particles is carried out, and titanium-nickel alloy layers are respectively plated by salt bath titanium plating and electroless nickel plating to form a structure of inner titanium and outer nickel;

[0038] In the composition of zirconia toughened alumina ceramic particles, Al 2 o 3 20wt.%~80wt.%, the balance is ZrO 2 .

[0039] The main raw materials used in salt bath titanium plating are titanium powder with a particle size of 20-100 mesh and active halogen salts, and alkaline or neutral plating solution is used for electroless nickel plating. The thickness ratio of the titanium layer to the nickel layer of the surface-modified zirconia-toughened alumina ceramic particles is about 1:3, and the total coating thickness is 10-50 microns.

[0040] S2. Evenly mix th...

Embodiment 1

[0049] 1) to Al 2 o 3 The zirconia toughened alumina ceramic particles with a mass fraction of 20% are surface-modified, 400-mesh titanium powder is used for salt bath titanium plating, and the titanium-plated particles are electroless nickel-plated with an alkaline plating solution, respectively plating 10 microns Titanium layer, 30 micron nickel layer;

[0050] 2) Evenly mix surface-modified zirconia toughened alumina ceramic particles with nickel-titanium alloy powder, wherein the amount of alloy powder accounts for 5% of the mass fraction of ZTA ceramic particles, place the mixed particles in a graphite mold and press In fact, the macroscopic pore diameter is

[0051] 3) Put graphite molds into a high-throughput non-pressure atmosphere sintering furnace, place 3×18 graphite molds at a time, and put in a protective atmosphere after vacuuming, control the heating rate to 15°C / min, and the sintering temperature to 1250°C. Keep warm for 2 hours to sinter a ceramic particl...

Embodiment 2

[0055] 1) to Al 2 o 3 Zirconia toughened alumina ceramic particles with a mass fraction of 40% are surface-modified, 400 mesh titanium powder is used for salt bath titanium plating, and alkaline plating solution is used to electroless nickel-plate the titanium-plated particles, respectively plating 10 microns Titanium layer, 30 micron nickel layer;

[0056] 2) Evenly mix surface-modified zirconia toughened alumina ceramic particles with nickel-titanium alloy powder, wherein the amount of alloy powder accounts for 10% of the mass fraction of ZTA ceramic particles, place the mixed particles in a graphite mold and press Real, macroscopic pore diameter size

[0057] 3) Put graphite molds into a high-throughput non-pressure atmosphere sintering furnace, place 3×24 graphite molds at a time, and put in a protective atmosphere after vacuuming, control the heating rate to 20°C / min, and the sintering temperature to 1300°C. Keep warm for 1 hour to sinter a ceramic particle prefabric...

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Abstract

The invention discloses a high-flux preparation method for a gravity impregnation composite liner. The surface of zirconia toughened alumina ceramic particles is modified, and titanium-nickel alloy layers are respectively plated to form a structure of inner titanium and outer nickel; The modified zirconia toughened alumina ceramic particles are uniformly mixed with nickel-titanium alloy powder, placed in a graphite mold and compacted; the graphite mold is placed in a high-throughput pressureless atmosphere sintering furnace, and the atmosphere is introduced to sinter Ceramic particle prefabricated body: the ceramic particle prefabricated body is placed on the working surface of the liner cavity, and the composite liner is prepared by high-throughput gravity casting and infiltration by stack casting technology. The invention can realize large-scale sintering of ceramic particle prefabricated bodies in the same furnace; can realize high-throughput and integrated preparation of ceramic-reinforced iron-based composite materials, and further greatly improve the efficiency of research and development and preparation of composite lining boards.

Description

technical field [0001] The invention belongs to the technical field of preparation of wear-resistant materials, and in particular relates to a high-throughput preparation method of gravity-impregnated composite liners. Background technique [0002] The liner is subjected to strong impact and wear by abrasives and balls during service, so the liner is required to have sufficient impact resistance and wear resistance. Traditional liners are usually made of single alloy steel or high chromium cast iron, in which the hard phase of high chromium cast iron is M with very high hardness. 7 C 3 Type carbide, the matrix structure can be regulated by heat treatment, with high quenching hardness, high impact toughness and good wear resistance. [0003] However, the wear resistance of the single-material liner in active service cannot meet the requirements for the wear performance of the liner under severe working conditions. It can significantly improve the wear resistance of the lin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/18B22F3/10B22F3/11B22F3/26B22D23/04
CPCB22F3/1007B22F3/1143B22F3/26B22D23/04B22F1/17
Inventor 郑巧玲李月辉李烨飞牛瑞霞周长猛刘庆坤刘宪民
Owner XI AN JIAOTONG UNIV
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