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Nanoparticle toughened ZTC4 titanium alloy and preparation method thereof

A nanoparticle, ZTC4 technology, applied in the field of titanium alloys, can solve the problems of not meeting the requirements of strong plasticity and no significant effect of strengthening and toughening titanium alloys, and achieve the effect of increasing strength, high strength and toughness, and increasing elongation

Active Publication Date: 2021-01-12
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the strength of commercial ZTC4 is about 820MPa, and the elongation is about 8% to 10%, which is increasingly unable to meet the strong plasticity requirements of practical applications.
The traditional strengthening of titanium alloys by heat treatment also has no significant effect on the strengthening and toughening of titanium alloys

Method used

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  • Nanoparticle toughened ZTC4 titanium alloy and preparation method thereof
  • Nanoparticle toughened ZTC4 titanium alloy and preparation method thereof
  • Nanoparticle toughened ZTC4 titanium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This embodiment provides a kind of ZTC4 titanium alloy, and its preparation method comprises the following steps:

[0032] S1, the Nano B 4 C powder and titanium powder with a particle size of 300 mesh are mixed according to a molar ratio of 1:3 to obtain a mixture; then, the mixture and aluminum powder with a particle diameter of 500 mesh are placed in a ball mill at a mass ratio of 30:70 at 50 Mix at a speed of 1 rpm for 24 hours to obtain alloy powder.

[0033] S2. Put the above alloy powder in aluminum foil, press it into a cylindrical compact with a diameter of 25 mm and a height of 35 mm, then put the compact into a graphite mold, and place the graphite mold in a vacuum heating furnace at 30 °C / min The heating rate is heated to 930°C for 10 minutes of heat preservation treatment, and then cooled to room temperature with the furnace to obtain nano-TiC and nano-TiB 2 Aluminum-based master alloy, wherein the particle size of nano-TiC is 60-120nm, nano-TiB 2 The pa...

Embodiment 2

[0040] This embodiment provides a kind of ZTC4 titanium alloy, and its preparation method comprises the following steps:

[0041] S1, the Nano B 4 C powder and titanium powder with a particle size of 300 mesh are mixed according to a molar ratio of 1:3 to obtain a mixture; then, the mixture and aluminum powder with a particle diameter of 500 mesh are placed in a ball mill at a mass ratio of 30:70 at 50 Mix at a speed of 1 rpm for 24 hours to obtain alloy powder.

[0042] S2. Put the above alloy powder in aluminum foil, press it into a cylindrical compact with a diameter of 25mm and a height of 35mm, then put the compact into a graphite mold, and place the graphite mold in a vacuum heating furnace at 30°C / min The heating rate is heated to 930°C for 10 minutes of heat preservation treatment, and then cooled to room temperature with the furnace to obtain nano-TiC and nano-TiB 2 Aluminum-based master alloy, wherein the particle size of nano-TiC is 60-120nm, nano-TiB 2 The parti...

Embodiment 3

[0049] This embodiment provides a kind of ZTC4 titanium alloy, and its preparation method comprises the following steps:

[0050] S1, the Nano B 4 C powder and titanium powder with a particle size of 300 mesh are mixed according to a molar ratio of 1:3 to obtain a mixture; then, the mixture and aluminum powder with a particle diameter of 500 mesh are placed in a ball mill at a mass ratio of 30:70 at 50 Mix at a speed of 1 rpm for 24 hours to obtain alloy powder.

[0051] S2. Put the above alloy powder in aluminum foil, press it into a cylindrical compact with a diameter of 25mm and a height of 35mm, then put the compact into a graphite mold, and place the graphite mold in a vacuum heating furnace at 30°C / min The heating rate is heated to 930°C for 10 minutes of heat preservation treatment, and then cooled to room temperature with the furnace to obtain nano-TiC and nano-TiB 2 Aluminum-based master alloy, wherein the particle size of nano-TiC is 60-120nm, nano-TiB 2 The parti...

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Abstract

The invention is applicable to the technical field of titanium alloys, and provides a nanoparticle toughened ZTC4 titanium alloy and a preparation method thereof. Toughened nanoparticles comprise nanoTiC and nano TiB2, and the molar ratio of the nano TiC to the nano TiB2 is 1: (1-3). The casting alloy comprises the following components in percentage by weight: 5.5%-6.8% of Al, 3.5%-4.5% of V, 88.4%-90.99% of Ti and 0.01%-0.3% of the toughened nanoparticles. By adding the toughened nano TiC and nano TiB2 particles, an unexpected effect is achieved: compared with ZTC4 titanium alloy without thenano TiC or nano TiB2 particles, the tensile strength, the yield strength and the elongation of the ZTC4 titanium alloy added with the nano particles are improved at the same time, and particularly,the elongation is remarkably improved. The nanoparticle toughened ZTC4 titanium alloy and the preparation method thereof have great significance in application of the ZTC4 titanium alloy in a complexenvironment.

Description

technical field [0001] The invention belongs to the technical field of titanium alloys, in particular to a ZTC4 titanium alloy strengthened and toughened by nanoparticles and a preparation method thereof. Background technique [0002] Titanium alloys have high specific strength, high specific stiffness, and good corrosion resistance. The above properties make titanium alloys very attractive for offshore applications. Titanium alloys have great advantages over steel in offshore applications. In 1986, Mobil used titanium to replace the carbon steel pipes damaged by corrosion in the ballast water system on the North Sea drilling platform. The project showed that the cost of using titanium alloys was only increased by 5%, but the service life of titanium alloys in seawater was much longer than that of carbon steel. In addition, medium and large components of TC4 titanium alloy used in offshore applications are directly manufactured by casting, and other preparation processes ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C1/10C22C1/03C22F1/18
CPCC22C14/00C22C1/1036C22F1/183C22C1/1047
Inventor 姜启川赵庆龙邱丰朱云龙
Owner JILIN UNIV
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