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Titanium alloy with excellent mechanical properties and preparation method of titanium alloy

A technology for titanium alloys with high performance, applied in the field of titanium alloys with excellent mechanical properties and its preparation, which can solve the problems of unsatisfactory tensile strength, elongation, large grain size of titanium alloys, and difficult control of oxygen content, etc., and achieves simple preparation methods Feasible, small grain size, low preparation cost

Active Publication Date: 2019-08-09
CHONGQING UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the preparation of titanium alloys and their products still faces the problem of difficult control of oxygen content and high cost. During the preparation process, it is difficult to solve the problem that the material becomes brittle due to a slightly high oxygen content, resulting in poor mechanical properties of the material, such as tensile strength. The strength, elongation, etc. are not ideal, and the grain size of the titanium alloy produced is relatively large

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  • Titanium alloy with excellent mechanical properties and preparation method of titanium alloy

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Embodiment 1

[0022] A preparation method of a titanium alloy with excellent mechanical properties, which is prepared according to the following steps:

[0023] 1. Premixing: Take 96 parts of titanium, 3 parts of iron, 0.8 parts of titanium oxide, 1.5 parts of ferric oxide and binder in a double-cone or V-shaped mixing cylinder. The total volume of metal powder and binder It occupies about 1 / 3~1 / 2 of the volume of the barrel, set the barrel speed to 50~60r / min, and the premixing time to 30~35min. The particle size of the raw material powder is 20-30 μm, and the binder includes 86 parts by mass of polyoxymethylene, 8 parts of high-density polyethylene, 8 parts of ethylene-vinyl acetate copolymer, 3 parts of stearic acid, 3 parts of glycerin, the volume ratio of the metal powder total volume to the binder in the premixing process is 55:50.

[0024] 2. Internal mixing: put the premixed metal powder and binder mixture at 180°C for 2 hours.

[0025] 3. Granulation to obtain injection molding f...

Embodiment 2

[0036] A preparation method of a titanium alloy with excellent mechanical properties, which is prepared according to the following steps:

[0037] 1. Premixing: Take 94 parts of titanium, 1 part of iron, 0.2 parts of titanium oxide, 1.2 parts of ferric oxide and binder in a double-cone or V-shaped mixing cylinder. The total volume of metal powder and binder It occupies about 1 / 3~1 / 2 of the barrel volume, set the barrel speed to 50r / min, and the premixing time to 30min. The particle size of the raw material powder is 40-50 μm, and the binder includes 80 parts by mass of polyoxymethylene, 6 parts of high-density polyethylene, 6 parts of ethylene-vinyl acetate copolymer, 1 part of stearic acid, 1 part of glycerin, the volume ratio of the total volume of the metal powder to the binder in the premixing process is 50:40.

[0038] 2. Internal mixing: Put the premixed metal powder and binder mixture at 150°C for 1 hour.

[0039] 3. Granulation to obtain injection molding feed: put t...

Embodiment 3

[0046] A preparation method of a titanium alloy with excellent mechanical properties, which is prepared according to the following steps:

[0047] 1. Pre-mixing: Take 98.5 parts of titanium, 5 parts of iron, 1.25 parts of titanium oxide, 2.5 parts of ferric oxide and binder in a double-cone or V-shaped mixing cylinder. The total volume of metal powder and binder It occupies about 1 / 3~1 / 2 of the volume of the barrel, set the barrel speed to 60r / min, and the premixing time to 35min. The particle size of the raw material powder is 10-20 μm, and the binder includes 92 parts by mass of polyoxymethylene, 10 parts of high-density polyethylene, 10 parts of ethylene-vinyl acetate copolymer, 5 parts of stearic acid, 5 parts of glycerin, the volume ratio of the metal powder total volume to the binder in the premixing process is 65:55.

[0048] 2. Internal mixing: Put the premixed metal powder and binder mixture at 200°C for 3 hours.

[0049] 3. Granulation to obtain injection molding f...

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Abstract

The invention discloses a titanium alloy with excellent mechanical properties. The titanium alloy is prepared from the following elements in percentage by mass: 0.3-0.9% of oxygen, 1-5% of iron, and 94.7-98.7% of titanium. According to the novel designed titanium alloy, the stabilization function mechanism of the oxygen and the iron on structures of different phases of the titanium alloy is utilized, a powder injection forming technology is adopted, a double-phase titanium alloy material containing the oxygen and the iron and corresponding products are prepared, the preparation cost is low, the product density can be up to 95-100%, the tensile strength reaches 650-1000 MPa, the extension rate reaches 3.5-10%, it is proved that the mechanical properties are excellent, the grain size of thetitanium alloy is small, the grain size is 30 [mu]m or below, the thickness of a secondary strip-shaped alpha phase in a product beta phase substrate is less than 100 nm, the length of the secondary strip-shaped alpha phase in the product beta phase substrate is less than 1000 nm, a preparation method is simple and feasible, and the titanium alloy is worthy of market application and promotion.

Description

technical field [0001] The invention relates to a titanium alloy with excellent mechanical properties and a preparation method thereof. Background technique [0002] Titanium alloy has the characteristics of low density, high strength, good corrosion resistance, and good biocompatibility. It is an important structural material and functional material with broad application prospects. Titanium is an extremely active element that easily combines with oxygen. Oxygen is one of the main impurity elements in titanium alloys, which will significantly reduce the plasticity and processability of titanium alloys. Therefore, the content of oxygen in general titanium alloys is required to be less than 0.15. The lower the oxygen content in the titanium alloy raw material, the more expensive it is. At the same time, during the preparation of titanium alloy materials and products, the increase of oxygen content must be strictly controlled to avoid the reduction of material plasticity and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C1/05C22C1/10B22F1/00B22F3/22B22F3/10
CPCC22C14/00C22C1/05B22F3/225B22F3/1021B22F1/103B22F1/10
Inventor 刘兵姜中涛姜山敬小龙邓莹陈巧旺
Owner CHONGQING UNIV OF ARTS & SCI