Method for preparing titanium alloy through high-speed pressing formation

A high-speed pressing and titanium alloy technology, applied in the field of powder metallurgy, can solve the problems of high cost and complicated preparation process, and achieve the effect of low cost, simple process and good practicability

Inactive Publication Date: 2012-07-18
GUANGZHOU RES INST OF NON FERROUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing titanium alloys by using powder metallurgy high-speed press forming to solve the shortcomings of the existing titanium alloy preparation process such as complex and high cost

Method used

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  • Method for preparing titanium alloy through high-speed pressing formation
  • Method for preparing titanium alloy through high-speed pressing formation
  • Method for preparing titanium alloy through high-speed pressing formation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Commercially available hydrogenated dehydrogenation Ti powder, Al powder, Mo powder and Fe powder are used. The particle size of Ti powder is 12.94-53.06 μm, the particle size of Al powder is 2-3 μm, the particle size of Mo powder is 5-10 μm, and the particle size of Fe powder is 1~5μm. The steps and process conditions for preparing titanium alloy by high-speed press forming are as follows:

[0023] Weigh 436g of Ti powder, 22.5g of Al powder, 34g of Mo powder and 7.5g of Fe powder and place them in a ball mill jar, fill with argon gas, and ball mill on the ball mill for 8 hours to form a uniform mixed powder; use zinc stearate anhydrous Lubricate the inner wall of the mold cavity with ethanol emulsion; fill the mold cavity with mixed powder, pressurize to 60MPa, hold the pressure for 3s, and pre-press to exhaust; the impact velocity is 3.36m / s, and the ratio of impact energy to powder loading is J760J: 9.00g, prepare the compact; place the compact in a high-vacuum sin...

Embodiment 2

[0028] The preparation method is the same as in Example 1. The pressure in step (3) is 70MPa, and the pressure is maintained for 1s; the impact velocity is 3.68m / s, the ratio of impact energy to powder loading is 913J: 8.85g; the heating rate is 4°C / min, and the sintering holding time is 2h. The density of the prepared compact is 4.241g / cm 3 , the properties after sintering are shown in Table 2:

[0029] Table 2

[0030] Sintering temperature / ℃

Embodiment 3

[0032] The preparation method is the same as in Example 2. The impact velocity is 3.97m / s, the ratio of impact energy to powder loading is 1065J: 8.34g, and the density of the prepared compact is 4.318g / cm 3 , the properties after sintering are shown in Table 3:

[0033] table 3

[0034] Sintering temperature / ℃

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Abstract

The invention discloses a method for preparing a titanium alloy through high-speed pressing formation. The method comprises the following steps of: mixing titanium-containing metal powder, lubricating a die wall, preparing a pressed shape through high-speed pressing formation, and performing vacuum sintering. The high-compactness titanium alloy is prepared through high-speed pressing formation and vacuum sintering; the process is simple; and the short-flow and low-cost preparation of the high-performance titanium alloy is realized. The compactness of the prepared titanium alloy is more than or equal to 98.08 percent; the Vickers hardness (HV) is 374 to 394; and the bending strength is 1,439 to 2,170MPa. The method is also applicable to the preparation of other titanium alloys and titanium-based composite materials in which titanium is taken as a matrix.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, in particular to a method for preparing titanium alloy by high-speed pressing. Background technique [0002] Titanium alloy has excellent characteristics such as low density, high specific strength and good corrosion resistance, and is widely used in aerospace, shipbuilding, chemical industry, automobile and medical equipment, especially in the automotive industry and civilian fields. . However, the traditional titanium preparation process is complicated and the production cost is high, which seriously hinders the application and development of titanium. Powder metallurgy is a near-net shape and low-cost material preparation technology, but the poor plasticity and high work hardening rate of titanium make it very difficult to form by traditional molding methods, and the compact density is usually lower than 85%. Increasing the density by means of processes such as hot pressing or hot ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/04C22C14/00
Inventor 闫志巧陈峰蔡一湘
Owner GUANGZHOU RES INST OF NON FERROUS METALS
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