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Ni-reinforced high-strength corrosion-resistant titanium alloy and preparation method thereof

A titanium alloy and high-strength technology, which is applied in the field of high-strength corrosion-resistant titanium alloy and its preparation, can solve the problems of not involving the Ni element alloy system and not given, and achieve the effect of good application prospects.

Inactive Publication Date: 2018-09-04
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] CN102965541A discloses a Ti80 titanium alloy standard substance and its preparation method. Although the composition of the Ti80 titanium alloy is given, it does not involve the alloy system of the Ni element. What happens to the corresponding structure and performance when Ni is added or not? Whether this change can achieve the expected goal is not given

Method used

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  • Ni-reinforced high-strength corrosion-resistant titanium alloy and preparation method thereof
  • Ni-reinforced high-strength corrosion-resistant titanium alloy and preparation method thereof
  • Ni-reinforced high-strength corrosion-resistant titanium alloy and preparation method thereof

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Embodiment 1

[0032] The Ni-enhanced high-strength corrosion-resistant titanium alloys provided in this example are cast Ti-6Al-3Nb-2Zr-1Mo, Ti-6Al-3Nb-2Zr-1Mo-0.1Ni, Ti-6Al-3Nb-2Zr-1Mo- 0.3Ni, Ti-6Al-3Nb-2Zr-1Mo-0.5Ni alloy, the specific preparation steps are as follows:

[0033] (1) Preparation of raw materials

[0034] Alloy raw materials are Ti, Al, Nb, Zr, Mo and Ni with a purity higher than 99%. The surface of the above raw materials is polished to remove scale, cleaned with industrial ethanol ultrasonic vibration, and then accurately weighed according to the mass fraction of each element. for alloy melting. The alloy composition is shown in Table 1:

[0035] Table 1 Nominal composition (wt.%) of Ti-6Al-3Nb-2Zr-1Mo-xNi alloy

[0036]

[0037]

[0038] (2) Alloy melting

[0039]The invention uses a vacuum consumable electric arc furnace to melt button ingots to study the structure and properties of cast alloys. Put the proportioned and weighed materials in a water-cooled cop...

Embodiment 2

[0059] The high-strength corrosion-resistant titanium alloy reinforced by Ni element provided in this embodiment is wrought Ti-6Al-3Nb-2Zr-1Mo-0.3Ni and Ti-6Al-3Nb-2Zr-1Mo alloy, and the specific preparation steps are as follows:

[0060] (1) Preparation of raw materials

[0061] The alloy raw materials are Ti, Al, Nb, Zr, Mo and Ni with a purity higher than 99%. The surface of the above raw materials is polished to remove scale, cleaned with industrial ethanol ultrasonic vibration, and then accurately weighed according to the mass fraction of each element. for smelting. The alloy composition is shown in Table 3:

[0062] Table 3 Nominal Composition of Alloys (wt.%)

[0063]

[0064] (2) Alloy melting and forging treatment

[0065] The invention uses a vacuum consumable electric arc furnace to smelt the alloy. The raw materials are placed in a water-cooled copper crucible, the sample chamber is evacuated, and argon gas with a purity of 99.999% is introduced into the mel...

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Abstract

The invention discloses a Ni-reinforced high-strength corrosion-resistant titanium alloy and a preparation method thereof. Nominal compositions of the alloy are shown as Ti-6Al-3Nb-2Zr-1Mo-xNi. The titanium alloy comprises, by mass, 5.5-6.5% of Al, 2.5-3.5% of Nb, 1.5-2.5% of Zr, 0.6-1.5% of Mo, 0.1-0.5% of Ni, and the balance Ti and inevitable impurities. The high-strength corrosion-resistant titanium alloy is a novel near-alpha-titanium alloy. Compared with a Ti80(Ti-6Al-3Nb-2Zr-1Mo) alloy, the room-temperature intensity of the Ni-reinforced high-strength corrosion-resistant titanium alloy is obviously improved. Under an as-cast condition, the room-temperature compression strength of the Ni-reinforced high-strength corrosion-resistant titanium alloy is superior to that of the as-cast alloy Ti80. The Ni-reinforced high-strength corrosion-resistant titanium alloy has the room-temperature tensile strength being 918.43 MPa and the room-temperature compression strength being 975.21 MPa. The Ni-reinforced high-strength corrosion-resistant titanium alloy is expected to be applied to ocean engineering equipment and has good application prospects.

Description

technical field [0001] The invention relates to a high-strength corrosion-resistant titanium alloy and a preparation method thereof. Background technique [0002] In the current situation that the world's resources are increasingly scarce, many countries in the world are developing and using the ocean. Offshore oil and gas development, especially the exploration and development of deepwater and ultra-deepwater oil and gas resources, has become a key area of ​​energy strategies for countries around the world. In order to solve the contradiction between energy supply and demand, vigorously develop marine resources and develop marine economy has become the common goal of many countries, especially developed countries and emerging economies. In the 21st century and for a long time to come, ocean competition will surely become an important strategic orientation for the development of all countries in the world. my country is a big economic country with a large demand for energy...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/02C22B9/20
CPCC22C14/00C22B9/20C22C1/02
Inventor 骆良顺苏宝献刘桐陈才敏司文健王亮苏彦庆郭景杰
Owner HARBIN INST OF TECH
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