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Graphite type coating paste for titanium and titanium alloy casting and preparation method thereof, and application of graphite type coating paste for titanium and titanium alloy casting

A graphite mold and titanium alloy technology, applied in casting molding equipment, molds, mold components, etc., can solve the problems of high coating cost, decreased coating performance, poor high temperature anti-cracking performance, etc., to achieve stable chemical properties, The effect of low cost and strong anti-cracking performance at high temperature

Active Publication Date: 2020-03-24
PANZHIHUA TIANMIN TITANIUM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Therefore, the current coating pastes for graphite casting mostly contain rare and precious metal oxides such as yttrium oxide and hafnium oxide, which has the problem of high coating cost. If these rare and precious metal oxides are not used, the coating performance will be reduced and the high temperature will be reduced. The problem of poor explosion-proof performance

Method used

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Examples

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preparation example Construction

[0031] The present invention also provides a preparation method of graphite-type coating paste for casting titanium and titanium alloys described in the above scheme, comprising the following steps:

[0032] The refractory aggregate, dispersant, binder and cohesion promoter are mixed, and then a defoamer is added for mixing to obtain the graphite-type coating paste for titanium and titanium alloy casting.

[0033] The present invention has no special requirements on the preparation method of the refractory aggregate and the dispersant, and it is sufficient to directly mix the components uniformly according to the proportion.

[0034] The present invention provides the application of the coating paste described in the above proposal in graphite casting, the application being: applying the coating paste on the inner wall of a graphite mold, followed by curing, drying and heat treatment in sequence to form a coating.

[0035]In the present invention, the paint paste is preferably...

Embodiment 1

[0040] A graphite-type coating paste for titanium and titanium alloy casting, comprising the following components in parts by weight: 850 parts of refractory aggregate, 120 parts of zirconium acetate, 10 parts of silane coupling agent kh55010, 18 parts of dispersant, and 2 parts of defoaming agent ; wherein the defoaming agent is a polyvinyl alcohol solution with a mass fraction of 2%; the refractory aggregate is composed of zirconium dioxide, titanium dioxide and titanium hydride, and the mass ratio of zirconium dioxide, titanium dioxide and titanium hydride is 50:45:5; dispersion The agent is composed of sodium oxide, fused silica powder and boron oxide, wherein the mass ratio of sodium oxide, fused silica powder and boron oxide is 50:45:5; zirconium dioxide, titanium dioxide, titanium hydride, sodium oxide, fused silica powder and oxide Boron is obtained by preparing powder with a particle size of 325 mesh and powder with a particle size of 800 mesh at a mass ratio of 1:1. ...

Embodiment 2

[0044] A graphite type coating paste for titanium and titanium alloy casting, comprising the following components in parts by weight: 820 parts of refractory aggregate, 150 parts of zirconium acetate, 10 parts of silane coupling agent kh55010, 16 parts of dispersant, and 4 parts of defoaming agent ; wherein the defoamer is a polyvinyl alcohol solution with a mass fraction of 2%; the refractory aggregate is composed of zirconium dioxide, titanium dioxide and titanium hydride, and the mass ratio of zirconium dioxide, titanium dioxide and titanium hydride is 55:42:3; dispersion The agent is composed of sodium oxide, fused silica powder and boron oxide, wherein the mass ratio of sodium oxide, fused silica powder and boron oxide is 45:50:5; zirconium dioxide, titanium dioxide, titanium hydride, sodium oxide, fused silica powder and oxide Boron is obtained by preparing powder with a particle size of 325 mesh and powder with a particle size of 800 mesh at a mass ratio of 1:1.

[0045...

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Abstract

The invention relates to the technical field of casting, and provides a graphite type coating paste for titanium and titanium alloy casting and a preparation method thereof, and application of graphite type coating paste for titanium and titanium alloy casting. The graphite type coating paste comprises the following components: refractory aggregate, a binder, a bonding promoter, a dispersant and an antifoaming agent; the refractory aggregate is composed of zirconium dioxide, titanium dioxide and titanium hydride, wherein the mass ratio of zirconium dioxide to titanium dioxide to titanium hydride is (50-55):(40-45):(1-5). The refractory aggregate of the coating paste provided by the invention does not contain rare and precious metal oxides such as yttrium oxide and hafnium oxide, the graphite type coating paste is low in cost, stable in coating chemical property and high in high-temperature anti-burst performance, and can be applied to graphite mold casting of titanium or titanium alloy, and an obtained casting is low in roughness, thin in pollution layer, few in surface flow marks and free of cracks.

Description

technical field [0001] The invention relates to the technical field of casting, in particular to a graphite-type coating paste for titanium and titanium alloy casting, a preparation method and application thereof. Background technique [0002] Titanium and titanium alloys have many excellent properties such as low density, high specific strength, corrosion resistance, good high and low temperature characteristics, and unique functions such as shape memory, superconductivity, hydrogen storage, and biocompatibility. , Marine engineering, energy, national defense, chemical industry, metallurgy, electric power, medical treatment, nuclear energy, sports and leisure and many other industries have been widely used, known as "space metal", "ocean metal", "all-round metal" and "future metal" , is a key supporting material in the field of engineering technology and high technology and an extremely important strategic metal material for national defense. At present, the amount of tita...

Claims

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Application Information

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IPC IPC(8): B22C3/00
CPCB22C3/00
Inventor 聂卫广方公军
Owner PANZHIHUA TIANMIN TITANIUM
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