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All alpha-type corrosion-resistant titanium alloy and preparation method thereof

A corrosion-resistant, titanium alloy technology, applied in the field of titanium alloys, can solve problems such as limiting the scope of application and increasing the cost of titanium alloys, and achieve the effects of improving corrosion resistance, improving corrosion resistance, and excellent corrosion resistance

Pending Publication Date: 2018-12-11
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the titanium alloy shows excellent corrosion resistance, the ASTM Gr.7 requires the addition of expensive Pd elements, which increases the cost of the titanium alloy and limits the scope of application

Method used

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  • All alpha-type corrosion-resistant titanium alloy and preparation method thereof
  • All alpha-type corrosion-resistant titanium alloy and preparation method thereof
  • All alpha-type corrosion-resistant titanium alloy and preparation method thereof

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preparation example Construction

[0038] The present invention also provides a method for preparing the full α-type corrosion-resistant titanium alloy described in the above technical solution, comprising the following steps:

[0039] (1) Obtain the as-cast alloy billet after melting the alloy raw material;

[0040] (2) deforming the as-cast alloy billet obtained in the step (1) after heat preservation treatment to obtain a densified alloy billet;

[0041] (3) The densified alloy billet obtained in the step (2) is subjected to solution treatment to obtain a full α-type corrosion-resistant titanium alloy.

[0042] In the invention, the alloy raw material is smelted to obtain the cast alloy billet. In the present invention, there is no special limitation on the type of the alloy raw material, and the alloy raw material well-known to those skilled in the art is used to obtain the titanium alloy with the target composition. In the present invention, the alloy raw materials preferably include sponge titanium, spo...

Embodiment 1

[0056] According to the alloy composition Ti-1Zr-0.08Ru (mass percentage), take 98.931g of industrial-grade sponge titanium and 1g of sponge zirconium and immerse in absolute ethanol. After ultrasonic cleaning, air-dry, add 0.08g of pure Ru, put In the water-cooled copper crucible of the consumable vacuum arc melting furnace, the inner wall of the copper crucible should be cleaned and wiped clean in advance to avoid bringing in other impurities, and the vacuum degree in the furnace cavity should be pumped to 8×10 -3 Below Pa, after filling high-purity argon gas as a protective gas (vacuum degree is 0.04-0.05MPa) before arc melting, the arc temperature is about 3000°C during each melting, and the melting time is about 2 minutes each time. After the smelting is completed, the ingot is cooled to obtain the ingot, and then the ingot is turned over for smelting, so that the smelting-casting ingot is repeatedly smelted and turned over 6 times to ensure that the composition of the fin...

Embodiment 2

[0061] According to the alloy composition Ti-5Zr-0.09Ru (mass percentage), take 94.013g of industrial-grade sponge titanium and 5g of sponge zirconium and soak them in absolute ethanol. Into the water-cooled copper crucible of the non-consumable vacuum arc melting furnace, the inner wall of the copper crucible should be cleaned and wiped clean in advance to avoid bringing in other impurities, and the vacuum degree in the furnace cavity should be pumped to 8×10 -3 Below Pa, after filling high-purity argon gas as a protective gas (vacuum degree is 0.04-0.05MPa) before arc melting, the arc temperature is about 2600°C during each melting, and the melting time is about 1 minute each time. After the smelting is completed, the ingot is cooled to obtain the ingot, and then the ingot is turned over for smelting, so that the smelting-casting ingot is repeatedly smelted and turned over 8 times to ensure that the finally obtained ingot has a uniform composition.

[0062] The alloy ingot i...

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Abstract

The invention provides an all alpha-type corrosion-resistant titanium alloy and a preparation method thereof. The all alpha-type corrosion-resistant titanium alloy comprises 0.08 to 0.14% of Ru (ruthenium), 1 to 50% of Zr (zirconium) and the balance of Ti (titanium), and does not contain Pd (palladium). The all alpha-type corrosion-resistant titanium alloy has the advantages that by strictly controlling the contents of the elements, the corrosion-resistant property and strength of the titanium alloy are improved through the alloying function; compared with Ti, the initiating passive potentialof Zr as the passivating metal is more negative, the passivating ability is stronger, the passivating can still occur under the weak oxidizing environment, a passivating film is easy to form at the surface of the alloy, and the corrosion-resistant property of the alloy can be improved in various corrosive mediums; proofed by experiment results, compared with the contrast alloy obtained by the sametreatment technology, the corrosion-resistant ability of the all alpha-type corrosion-resistant titanium alloy in a sodium chloride solution is improved by 23.46%.

Description

technical field [0001] The invention relates to the technical field of titanium alloys, in particular to a full α-type corrosion-resistant titanium alloy and a preparation method thereof. Background technique [0002] Titanium and titanium alloys are widely used in marine engineering, aerospace, biomedical engineering, metallurgy, chemical industry, light industry and many other fields. With the widespread application of titanium and titanium alloys, the development of industry and the service environment have put forward more stringent requirements on the performance of titanium alloys. It is difficult for traditional titanium alloys to meet the current engineering application standards in terms of strength and corrosion resistance. The high-strength titanium corrosion-resistant alloy is one of the key directions of research, development and application at present. [0003] Titanium and titanium alloys are actively used in the field of aircraft due to their outstanding cha...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C16/00C22C1/02C22F1/18
CPCC22C14/00C22C1/02C22C16/00C22F1/002C22F1/18C22F1/183C22F1/186
Inventor 刘日平李波张星姬朋飞马明臻张新宇
Owner YANSHAN UNIV
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