A kind of in-situ ultrafine grain TIC reinforced titanium matrix composite material based on cyclohexene ball milling medium and its preparation method

A technology of titanium-based composite material and ball milling medium, which is applied in the field of non-ferrous metal processing, can solve the problems of high energy consumption, low utilization rate of cast titanium products, and reduced alloy plasticity, and achieves reduction of raw material costs, rapid and efficient preparation, and cost savings Effect

Active Publication Date: 2022-04-12
SOUTH CHINA UNIV OF TECH +1
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  • Claims
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AI Technical Summary

Problems solved by technology

[0005] (1) The preparation of titanium-based composites by melting and casting uses pure titanium as raw material and the melting temperature is high (>1668°C), which consumes a lot of energy; moreover, the material utilization rate of melting and casting titanium products is relatively low
[0006] (2) Most of the titanium-based composites prepared by powder metallurgy use pure titanium powder as raw material, and combine ball milling, element mixing and other methods to introduce reinforcing phases, but there are the following shortcomings: First, titanium powder is very easy to introduce impurities during ball milling ( Such as oxygen, etc.) to reduce the plasticity of the alloy; second, the reinforcement phase introduced by element mixed powder has problems of agglomeration and excessive size, resulting in poor strengthening effect; third, pressure-assisted sintering or pressureless sintering combined with thermomechanical treatment is required to prepare dense alloys. relatively high cost
[0007] (3) The existing titanium-based composite materials prepared by sintering titanium hydride powder have the problems of uneven structure, low density and poor mechanical properties

Method used

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  • A kind of in-situ ultrafine grain TIC reinforced titanium matrix composite material based on cyclohexene ball milling medium and its preparation method
  • A kind of in-situ ultrafine grain TIC reinforced titanium matrix composite material based on cyclohexene ball milling medium and its preparation method
  • A kind of in-situ ultrafine grain TIC reinforced titanium matrix composite material based on cyclohexene ball milling medium and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0042] A method for preparing in-situ ultrafine-grained TiC reinforced titanium-based composite materials based on cyclohexene ball milling media, comprising the following steps:

[0043] The raw materials used in this example are as follows: 60Al40V powder (particle size 25 μm), titanium hydride powder (particle size 75 μm), pure Ti powder (particle size 45 μm), cyclohexene.

[0044] (1) Preparation of composite powder by high-energy ball milling: 100 parts by mass of 60Al40V and 20 parts by mass of Ti powder were weighed and mixed in a powder mixer at a speed of 300 rpm for 12 hours. Then pour the uniformly mixed powder and 40 parts by volume of cyclohexene into a planetary ball mill (QM-2SP20) stainless steel ball milling tank. The diameters of the selected stainless steel balls are 15mm, 10mm and 6mm respectively, and the mass ratio is 1:3:1. The ball milling parameters are as follows: the atmosphere is 1 atmosphere of high-purity argon (99.999%), the ball-to-material rati...

Embodiment 2

[0049] A method for preparing in-situ ultrafine-grained TiC reinforced titanium-based composite materials based on cyclohexene ball milling media, comprising the following steps:

[0050] The raw materials used in this example are as follows: 60Al40V powder (particle size 25 μm), titanium hydride powder (particle size 75 μm), pure Ti powder (particle size 45 μm), cyclohexene.

[0051] (1) Design of TiC content: Ti-6Al-4V is selected as the alloy in this embodiment. First, the TiC content in the design target product is 3vol.%, and the mass fraction of TiC in the composite material can be calculated as 3.3wt.% according to the formula (1):

[0052]

[0053] Among them, i v To design the TiC volume fraction in the target product, ρ TiC TiC density (4.93g / cm 3 ), ρ M is the density of the selected matrix alloy. Then 10 parts by mass of 60Al40V required by 100 parts by mass of Ti6Al4V composite material requires 3.3 parts by mass of TiC. According to the amount of TiC gen...

Embodiment 3

[0058] A method for preparing in-situ ultrafine-grained TiC reinforced titanium-based composite materials based on cyclohexene ball milling media, comprising the following steps:

[0059] The raw materials used in this example are as follows: vanadium powder (45 μm), iron powder (45 μm), aluminum powder (25 μm), titanium hydride powder (75 μm), pure titanium powder (45 μm), and cyclohexene.

[0060] (1) TiC content design: the alloy selected in this embodiment is Ti-10V-2Fe-3Al. First, design the mass of TiC to be 1vol.%, and calculate the mass fraction of TiC in the composite material to be 1.05% according to the formula (1). Then 100 parts by mass of the Ti-10V-2Fe-3Al composite material requires 15 parts by mass of 10V-2Fe-3Al and 1.05 parts by mass of TiC. According to the amount of TiC generated: the amount of Ti added is 0.8825 and the mass of Ti required for calculation is 1.19 parts by mass. Then the mass ratio of 10V-2Fe-3Al to Ti is 15:1.19. According to the mass ...

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Abstract

The invention belongs to the technical field of non-ferrous metal processing, and discloses an in-situ ultrafine-grained TiC reinforced titanium-based composite material based on cyclohexene ball milling media and a preparation method thereof. Crystalline TiC, combined with sintering titanium hydride powder to prepare titanium-based composite materials. The pressureless sintering density of the TiC reinforced Ti-6Al-4V composite material alloy prepared by the invention is as high as 99.2%, the tensile strength is 1068MPa, and the elongation after fracture is 8%, realizing the tensile plasticity of the titanium-based composite material prepared by sintering titanium hydride A breakthrough from scratch, the wear volume of the adjusted composite material is 23% and 19% lower than that of Ti6Al4V and wear-resistant steel, respectively, and can be applied to high-strength or wear-resistant materials in aerospace, armored vehicles, weapons, ships, automobiles and other fields In the low-cost preparation of structural parts; the method of the invention is suitable for the preparation of composite materials of all titanium alloys, and has wide applicability.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal processing, and in particular relates to an in-situ ultrafine-grained TiC reinforced titanium-based composite material based on cyclohexene ball milling media and a preparation method thereof. Crystalline TiC, combined with sintering titanium hydride powder to prepare titanium-based composite materials. Background technique [0002] Titanium is a non-ferrous metal material with great application potential. Titanium and titanium alloys have high specific strength, low density, excellent biocompatibility and corrosion resistance, and are widely used in aerospace, military, energy, chemical, shipbuilding and other fields. Overcoming the contradiction of strong plasticity and reducing manufacturing costs are important development directions of titanium and titanium alloys. [0003] Titanium-based composites are prepared by adding a reinforcing phase to the titanium matrix. Compared with th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C14/00C22C32/00B22F9/04
CPCC22C1/05C22C14/00C22C32/0052B22F9/04B22F2009/043
Inventor 杨超陈涛屈盛官李元元洪振军贾冬生卢知渊王卓
Owner SOUTH CHINA UNIV OF TECH
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