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Method for preparing low temperature welding titanium carbide coating

A technology of low-temperature welding and titanium carbide, which is applied in the direction of coating, overlay coating, metal material coating process, etc., can solve the problem of poor heat resistance and wear resistance of titanium carbide wire saws and limit titanium carbide coating products Application, small holding force of titanium carbide particles, etc., to achieve the effect of large binding force, increased holding force, and simple steps

Active Publication Date: 2018-06-01
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the consolidation methods of titanium carbide abrasives in the coating include electroplating method, resin bonding method, mechanical rolling method and brazing method, but each method has certain defects.
Resin bonding method Resin is used as a binder to consolidate titanium carbide abrasives on the substrate, but the heat resistance and wear resistance of the prepared titanium carbide wire saw are not good, the matrix has a small holding force on titanium carbide particles, and the titanium carbide particles are easy to fall off
The brazing method is to weld a single layer of titanium carbide particles on the surface of the substrate at high temperature, but the high temperature heating process will cause thermal damage to the substrate, which has a certain impact on the performance of the substrate
The electroplating method uses electroplated metal as a binder, and the titanium carbide abrasive is consolidated on the substrate through the electrodeposition of the metal. The production efficiency is low and the cost is high.
These limit the application of titanium carbide coated products

Method used

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  • Method for preparing low temperature welding titanium carbide coating
  • Method for preparing low temperature welding titanium carbide coating
  • Method for preparing low temperature welding titanium carbide coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 1) Mix Sn-9.0Zn alloy powder, water-soluble flux and titanium carbide bare powder (with a particle size distribution of 5-10 μm) in a mass ratio of 7:4:7, and stir for 5 minutes at a speed of 5 r / min on a mixer ; After vacuuming, stir at 25r / min for 25 minutes to obtain a paste containing titanium carbide micropowder.

[0044] 2) Select a copper-coated steel wire with a diameter of 80 μm as the base material, and pretreat the steel wire. ① Prepare a degreasing solution: sodium hydroxide 10g / L, anhydrous sodium carbonate 25g / L, sodium silicate 22g / L, phosphoric acid Sodium 25g / L, wash at 60°C. ②Rinse the surface of the steel wire with water and then quickly rinse it with 100g / L hydrochloric acid ③Rinse it with deionized water and dry it; then pass the wire at a certain speed through a container containing the paste prepared in step 1), and the container exits It is a circular hole with a diameter of 150 μm.

[0045] 3) put the steel wire with paste on the surface obtai...

Embodiment 2

[0053] 1) Mix Sn-9.0Zn alloy powder, water-soluble flux and nickel-plated titanium carbide micropowder on the surface (the coating thickness is 2 μm, and the particle size distribution is 5-10 μm) in a mass ratio of 7:4:7. Stir at a speed of 5 r / min for 5 minutes; then stir at a speed of 25 r / min for 25 minutes after vacuuming to obtain a paste containing titanium carbide micropowder.

[0054] 2) Select a copper-coated steel wire with a diameter of 80 μm as the base material, and pretreat the steel wire. ① Prepare a degreasing solution: sodium hydroxide 10g / L, anhydrous sodium carbonate 25g / L, sodium silicate 22g / L, phosphoric acid Sodium 25g / L, wash at 60°C. ②Rinse the surface of the steel wire with water and then quickly rinse it with 100g / L hydrochloric acid ③Rinse it with deionized water and dry it; then pass the wire at a certain speed through a container containing the paste prepared in step 1), and the container exits It is a circular hole with a diameter of 150 μm.

...

Embodiment 3

[0063] ) Mix Sn-1.0Ag-0.5Cu alloy powder, water-soluble flux and surface titanium-coated titanium carbide micropowder (the coating thickness is 1 μm, and the particle size distribution is 2-3 μm) with a mass ratio of 3:5:2, and mix them in a mixer Stir at a speed of 5 r / min for 5 minutes; vacuumize and then stir at a speed of 25 r / min for 25 minutes to obtain a paste containing titanium carbide micropowder.

[0064] 2) Select a copper-coated steel wire with a diameter of 70 μm as the base material, and pretreat the steel wire. ① Prepare a degreasing solution: sodium hydroxide 10g / L, anhydrous sodium carbonate 25g / L, sodium silicate 22g / L, phosphoric acid Sodium 25g / L, wash at 60°C. ②Rinse the surface of the steel wire with water and then quickly rinse it with 100g / L hydrochloric acid ③Rinse it with deionized water and dry it; then pass the wire at a certain speed through a container containing the paste prepared in step 1), and the container exits It is a circular hole with a...

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Abstract

The invention provides a method for preparing a low temperature welding titanium carbide coating. Titanium carbide micro powder is welded to the surface of matrix metal through low-melting-point alloypowder and a flux under the low temperature condition, and the influences of too high welding temperature on the properties of the matrix metal are reduced. The method mainly comprises the followingsteps that 1, the low-melting-point alloy powder, the flux and the titanium carbide micro powder are evenly mixed into paste according to a certain proportion; 2, the prepared paste containing the titanium carbide micro powder is evenly smeared on the matrix surface; 3, the material coated with the paste is heated to a certain temperature, and the titanium carbide micro powder is solidified on thematrix surface through welding; and 4, finally, the surface of an obtained finished product can be subjected to copper plating and diffusion annealing, so that the higher bonding strength can be achieved. The titanium carbide coating prepared through the method is high in bonding force and strength, and thus the finished product machining quality and efficiency are greatly improved.

Description

technical field [0001] The invention relates to a technology for welding titanium carbide coatings at low temperature, and belongs to the technical field of material preparation. Background technique [0002] Titanium carbide is the hardest known carbide and is an important raw material for the production of cemented carbide. Titanium carbide also has the characteristics of high thermal hardness, small friction coefficient and low thermal conductivity, so tools containing titanium carbide have higher cutting speed and longer service life than tools of other materials. If a thin layer of titanium carbide is prepared on the surface of other materials, the performance of the material can be greatly improved. Since titanium carbide abrasive tools often require great strength and wear resistance, the preparation method of titanium carbide coating is extremely important. At present, the consolidation methods of titanium carbide abrasives in the coating include electroplating, re...

Claims

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Application Information

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IPC IPC(8): C23C24/10C23C28/02C22C13/00C25D5/50
CPCC22C13/00C23C24/103C23C28/027C25D5/50
Inventor 薛烽卜丽丽郝建周健白晶尹宏锐
Owner SOUTHEAST UNIV
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