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A kind of nanoparticle toughened ztc4 titanium alloy and preparation method thereof

A technology of nano-particles and titanium alloys, applied in the field of titanium alloys, can solve the problems of no significant effect on the strengthening and toughening of titanium alloys, and can not meet the requirements of strong plasticity, so as to improve strength, high strength and toughness, improve tensile strength and yield The effect of intensity

Active Publication Date: 2022-04-19
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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  • A kind of nanoparticle toughened ztc4 titanium alloy and preparation method thereof
  • A kind of nanoparticle toughened ztc4 titanium alloy and preparation method thereof
  • A kind of nanoparticle toughened ztc4 titanium alloy and preparation method thereof

Examples

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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 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 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 nano-particle toughened ZTC4 titanium alloy and a preparation method thereof. The toughened nano-particles include nano-TiC and nano-TiB 2 , and nano-TiC and nano-TiB 2 The molar ratio is 1:(1~3). The casting alloy comprises the following components: 5.5%-6.8% of Al, 3.5%-4.5% of V, 88.4%-90.99% of Ti, and 0.01%-0.3% of strengthening and toughening nanoparticles. The present invention adds toughening nano-TiC and nano-TiB 2 The particles obtained unexpected effects: with and without adding nano-TiC and nano-TiB 2 Compared with the ZTC4 titanium alloy with particles, the tensile strength, yield strength and elongation of the ZTC4 titanium alloy added with nanoparticles are all improved at the same time, especially the elongation is significantly improved, which has great significance for the application of ZTC4 titanium alloy in complex environments. Great significance.

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 Patents(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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