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Corrosion-resistant titanium alloy

A titanium alloy and corrosion-resistant technology, applied in the field of corrosion-resistant titanium alloys, can solve the problems of high alloy cost, limited application range of pure titanium, erosion, etc., and achieve the effects of low cost, improved thermodynamic stability, and enhanced corrosion resistance.

Inactive Publication Date: 2015-07-01
CHANGSHU SHUNAGYU COPPER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the crevice corrosion of pure titanium in high-temperature chloride solutions and severe corrosion in reducing acid environments, the strength will decrease at higher temperatures. Therefore, the application range of pure titanium is limited. People began to develop corrosion-resistant Titanium alloy to replace the use of pure titanium
The existing corrosion-resistant titanium alloys are mainly titanium-palladium alloys, which can be used in environments with dilute reducing acids at room temperature, high-temperature chlorides, and alternating redox properties, and have good processing, forming, and welding properties. However, due to its palladium content, Alloy cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] A corrosion-resistant titanium alloy, including the main raw materials and the mass percentage of each raw material: titanium powder 89.28%, molybdenum powder 5%, nickel powder 2%, molybdenum powder 1.5%, copper powder 0.5%, silicon powder 1.5%, chromium Powder 0.2% and trace inevitable impurities 0.02%;

[0012] The above-mentioned raw materials are mixed and put into a vacuum induction heating furnace for smelting, the furnace temperature is controlled to 1440±10°C, and the holding time is 5-6 hours to obtain the corrosion-resistant titanium alloy.

Embodiment 2

[0014] A corrosion-resistant titanium alloy, including the main raw materials and the mass percentages of each raw material: titanium powder 86.98%, molybdenum powder 7%, nickel powder 3%, molybdenum powder 0.5%, copper powder 0.2%, silicon powder 2%, chromium 0.3% powder and 0.02% trace inevitable impurities;

[0015] Mo powder: 5%-8%; Nickel powder: 1%-3%; Mo powder: 0.5%-1.5%; Copper powder: 0.2%-0.5%; Silicon powder: 1.5%-2%; Chromium powder: 0.1% -0.3%

[0016] The above-mentioned raw materials are mixed and put into a vacuum induction heating furnace for smelting, the furnace temperature is controlled to 1440±10°C, and the holding time is 5-6 hours to obtain the corrosion-resistant titanium alloy.

Embodiment 3

[0018] A corrosion-resistant titanium alloy, including the main raw materials and the mass percentages of the raw materials: titanium powder 87.79%, molybdenum powder 8%, nickel powder 1%, molybdenum powder 1%, copper powder 0.4%, silicon powder 1.6%, chromium Powder 0.2% and trace inevitable impurities 0.01%;

[0019] The above-mentioned raw materials are mixed and put into a vacuum induction heating furnace for smelting, the furnace temperature is controlled to 1440±10°C, and the holding time is 5-6 hours to obtain the corrosion-resistant titanium alloy.

[0020] The present invention discloses a corrosion-resistant titanium alloy. By optimizing the composition and ratio of the titanium alloy, especially by adding an appropriate amount of molybdenum, the thermodynamic stability of the alloy is improved; nickel is added to strengthen the corrosion resistance of the alloy; With molybdenum, a more stable passivation film can be formed on the surface of the titanium alloy; the titani...

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PUM

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Abstract

The invention discloses a corrosion-resistant titanium alloy. The corrosion-resistant titanium alloy is prepared from the following main raw materials in percentage by mass: 5-8% of molybdenum powder, 1-3% of nickel powder, 0.5-1.5% of molybdenum powder, 0.2-0.5% of copper powder, 1.5-2% of silicon powder, 0.1-0.3% of chromium powder and the balance of titanium and trace amount of inevitable impurities. The corrosion-resistant titanium alloy is formed by mixing the raw materials according to the percents by mass and carrying out vacuum high-temperature smelting. By virtue of the manner, the corrosion-resistant titanium alloy has good corrosion resistance in high-temperature and high-concentration reducible acid environment, also has good abrasion resistance and strength and is low in cost.

Description

Technical field [0001] The invention relates to the field of titanium alloy materials, in particular to a corrosion-resistant titanium alloy. Background technique [0002] Pure titanium has excellent corrosion resistance, high specific strength and good processing performance, so it is widely used in equipment for processing seawater cooling and desalination, as well as processing and transporting salt solutions, wet chlorine and nitric acid and other media. In fields such as hydrometallurgy, oil and gas exploration and ocean engineering, the application of titanium has played a positive role in promoting economic development. However, due to the crevice corrosion of pure titanium in high-temperature chloride solutions, severe corrosion in a reducing acid environment, and a decrease in strength at higher temperatures, the application range of pure titanium is limited, and people began to develop corrosion resistance Titanium alloys are used instead of pure titanium. The existin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00
Inventor 薛红军
Owner CHANGSHU SHUNAGYU COPPER IND CO LTD