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Titanium alloy with excellent mechanical properties and preparation method thereof

A titanium alloy and performance technology, which is applied in the field of titanium alloys with excellent mechanical properties and their preparation, can solve the problems of unsatisfactory tensile strength and elongation, poor mechanical properties of materials, and brittle materials, and achieves a simple and feasible preparation method and mechanical The effect of excellent performance and economical preparation process

Active Publication Date: 2020-06-09
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 thereof

Examples

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Effect test

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 barrel volume, set the barrel speed at 50~60r / min, and the premixing time at 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 feed: pu...

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 barrel volume, 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 feed: pu...

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Abstract

A titanium alloy with excellent mechanical properties is composed of the following elements in mass percentage, 0.3-0.9% of oxygen element, 1-5% of iron element, and 94.7-98.7% of titanium element. The novel titanium alloy designed by the present invention utilizes the stabilization mechanism of oxygen and iron elements on the different phase structures of titanium alloys, adopts powder injection molding technology, and prepares a dual-phase titanium alloy material containing oxygen and iron alloy elements and corresponding products , the preparation cost is low, the product density can be as high as 95~100%, the tensile strength can reach 650~1000MPa, and the elongation can reach 3.5~10%, which proves that the mechanical properties are excellent. The grain size of the present invention is small, and the grain size is below 30 μm , the thickness of the secondary strip α phase in the β phase matrix of the product is less than 100nm, the length is less than 1000nm, the preparation method is simple and feasible, and it is worthy of market promotion and application.

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 Patents(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