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Low cost beta titanium alloy and its preparing method

A titanium alloy and alloy technology, applied in the field of β-type titanium alloy and its preparation, can solve the problems of hindering sintering densification, high cost, low production efficiency, etc., and achieve the effect of promoting the densification process and improving plasticity

Inactive Publication Date: 2005-03-02
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, due to the high activity of titanium, high oxygen content in powder metallurgy, and a dense oxide film on the surface of titanium powder hinders its sintering and densification, the development of powder metallurgy titanium alloys is hindered.
In order to obtain high-density and high-performance titanium alloys, technologies such as hot isostatic pressing and powder injection molding were mostly used in the early stage, but due to the limitation of their preparation process and equipment, the production efficiency is low and the cost is high

Method used

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  • Low cost beta titanium alloy and its preparing method
  • Low cost beta titanium alloy and its preparing method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Use hydrogenated dehydrogenation titanium powder with an oxygen content of 0.3wt%, Fe-Mo alloy powder with an oxygen content of 0.68% and Nd-containing master alloy powder with an oxygen content of 0.51wt%, and mix them uniformly according to the nominal alloy ratio. After 200MPa The pressure isostatic pressing into a powder metallurgy cylindrical standard tensile specimen (GB / T7963-1987), in a vacuum of 1 × 10 -3 Pa, sintered at 1250°C to get 1 # Sample, the test results are shown in Table 1 # sample data.

Embodiment 2

[0017] Use hydrogenated dehydrogenation titanium powder with an oxygen content of 0.3wt%, FeMo alloy powder with an oxygen content of 0.68%, and Nd-containing master alloy powder with an oxygen content of 0.51wt%, and mix them evenly according to the nominal alloy ratio. Isostatic pressing into powder metallurgy cylindrical standard tensile specimen (GB / T7963-1987), in a vacuum of 1 × 10 -3 Pa, sintered at 1200℃ to get 2 # Sample, the test results are shown in Table 2 # sample data.

Embodiment 3

[0019] Use hydrogenated dehydrogenation titanium powder with an oxygen content of 0.3wt%, FeMo alloy powder with an oxygen content of 0.68%, and Nd-containing master alloy powder with an oxygen content of 0.51wt%, and mix them evenly according to the nominal alloy ratio. Isostatic pressing into powder metallurgy cylindrical standard tensile specimen (GB / T7963-1987), in a vacuum of 1 × 10 -3 Pa, sintered at 1350°C to get 3 # Sample, the test results are shown in Table 3 # sample data.

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Abstract

The present invention relates to low cost beta-type titanium alloy prepared with cheap elements and its preparation process. The alloy consists of Fe 1-1.5 wt%, Mo 1-2.25 wt%, Al 0.3-6 wt%, Nd 1.2-2 wt% except Ti and inevitable impurity. The preparation process includes compounding Nd containing mother alloy powder, Fe powder, Mo powder or intermediate alloy powder and Ti powder in nominal alloy components; cold equipressure forming the mixture powder, and sintering at 1250-1400 deg.c for 1-6 hr. The tested mechanical performance includes the room temperature stretching parameters of: sigma-b of 750-940 MPa, sigma-0.2 of 660-860 MPa and sigma-5 of 14-25 %.

Description

technical field [0001] A low-cost beta-type titanium alloy relates to a beta-type titanium alloy prepared by using cheap elements and a preparation method thereof. Background technique [0002] Due to its high strength and high toughness, titanium alloys are used as structural parts in aviation, aerospace, racing cars, etc. However, due to the expensive raw materials of titanium alloys and difficulties in smelting and processing, the production costs are high, usually 8-10 times that of steel, which greatly limits the application of titanium alloys. Powder metallurgy is a near net shape technology with high raw material utilization and low process cost. However, due to the high activity of titanium, high oxygen content in powder metallurgy, and a dense oxide film on the surface of titanium powder hinders its sintering and densification, the development of powder metallurgy titanium alloys has been hindered. In order to obtain high-density and high-performance titanium allo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00
Inventor 汤慧萍刘海彦黄原平
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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