Cast-infiltration method for improving surface corrosion resistance of casting

A technology for corrosion resistance and casting, which is applied in the field of casting infiltration to improve the corrosion resistance of the surface of castings, can solve the problems of increasing size requirements of titanium-steel clad plates, difficult market demand for products, and high production costs, and achieve a combined effect. Good, saving precious metals, short production cycle effect

Inactive Publication Date: 2015-11-25
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the process methods of titanium-steel composite mainly include the following: ①explosive welding method; due to the difficulty in welding between different metals; ②diffusion welding method has been transplanted to produce titanium-steel clad plate joints; With the rapid development, the size requirements for titanium-steel clad plates are getting big...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A casting infiltration method for improving the corrosion resistance of the casting surface, comprising the following steps:

[0028] Step 1. Weigh titanium-nickel alloy particles with a particle size of 40-200 mesh, polyvinyl butyral and alcohol, and mix them uniformly to form a composite coating for later use. The amount of PVB added is 2% of the weight of the alloy, and the amount of titanium and nickel is The mass ratio is 80:20;

[0029] Step 2. Coat the composite coating prepared in step 1 on the part of the mold cavity corresponding to the casting to improve corrosion resistance. The coating thickness is 6mm. After coating, ignite the composite coating to make the composite coating solidify and adhere to the In the mold cavity, spare;

[0030] Step 3, put the casting mold in step 2 into the casting box, pour argon gas into the casting box to form a local protective atmosphere, and set aside;

[0031] Step 4: Melt the cast iron to be poured to 1350° C. and then ...

Embodiment 2

[0034] A casting infiltration method for improving the corrosion resistance of the casting surface, comprising the following steps:

[0035] Step 1. Weigh titanium-nickel alloy particles with a particle size of 40-200 mesh, polyvinyl butyral and alcohol, and mix them uniformly to form a composite coating for later use. The amount of PVB added is 2% of the weight of the alloy, and the amount of titanium and nickel is The mass ratio is 90:10;

[0036] Step 2. Apply the composite coating prepared in step 1 on the part of the mold cavity corresponding to the casting to improve corrosion resistance. The coating thickness is 8mm. After the coating is completed, ignite the composite coating to make the composite coating solidify and adhere to the In the mold cavity, spare;

[0037] Step 3, put the casting mold in step 2 into the casting box, pour argon gas into the casting box to form a local protective atmosphere, and set aside;

[0038] Step 4: Melt the cast steel to be poured to...

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Abstract

A cast-infiltration method for improving surface corrosion resistance of a casting comprises the following steps that firstly, titanium-nickel alloy particles, polyvinyl butyral and ethyl alcohol are weighed and mixed to form a composite coating, and then the casting cavity is coated with the composite coating and corresponds to the part, with the abrasion resistance to be improved, of the casting. The casting thickness ranges from 6 mm to 8 mm. After coating is finished, the composite coating is ignited, the composite coating is cured and bonded into the casting cavity, then the casting is placed in a casting tank, and the casting tank is inflated with argon. A metal base body to be poured is melted to the set temperature, then the molten metal base body is poured in the casting for pouring, and after natural cooling, a titanium-nickel particle strengthened metal base composite material is obtained. The cast-infiltration method is high in operability and simple in technological process, precious metal is effectively saved, and the production cost of the industry is reduced.

Description

technical field [0001] The invention relates to a casting infiltration method, in particular to a casting infiltration method for improving the corrosion resistance of the casting surface. Background technique [0002] Corrosion of cast iron or cast steel materials in sea-like climates, especially when working in harsh conditions such as seawater, high temperature, high humidity, high smog, and high sunlight, damage due to corrosion occurs from time to time. At present, scientific and technological workers usually add modified alloy elements to the cast iron or cast steel materials used to improve their high temperature resistance and corrosion resistance, but this greatly increases the cost of parts. [0003] The use of Zn-Al alloy anti-corrosion cast-infiltrated layer is one of the effective methods for corrosion protection of steel structures, but in practical applications, Zn-Al cast-infiltrated layer must be sealed with synthetic coatings to prevent the gaps that penetr...

Claims

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Application Information

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IPC IPC(8): B22D19/02
Inventor 魏世忠张国赏王长记李继文徐流杰潘昆明李志勋郭军力张会杰
Owner HENAN UNIV OF SCI & TECH
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