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Method for synthesizing Ti-Al-Sn powder material by self-spreading reaction

A technology of ti-al-sn and powder materials, which is applied in the field of high-temperature self-propagating reaction synthesis of Ti-Al-Sn composite powder materials, can solve the problem of destroying the stoichiometric composition of alloy elements, the volatilization loss of alloy elements, and the influence of alloy properties, etc. problem, to achieve the effect of low cost, low energy consumption and low energy consumption

Inactive Publication Date: 2011-03-16
HARBIN ENG UNIV
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Problems solved by technology

[0003] At present, the method of preparing this kind of material is mainly to use water-cooled copper crucible vacuum induction melting (ISM), but this method has fatal shortcomings.
Since the vacuum degree of the vacuum smelting chamber is above 1.0 Pa, the heating temperature during smelting is very high, and the melting point difference between Ti-Al and Ti-Sn is very large, so there must be severe volatilization of alloying elements during the smelting process. The phenomenon of loss, thus destroying the stoichiometric composition of alloying elements, which in turn has a significant impact on the properties of the alloy

Method used

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Embodiment Construction

[0013] The present invention is described in more detail below:

[0014] 1. Use an electronic balance according to Ti 5 al 2.5 Stoichiometric ratio of Sn Weigh appropriate amounts of Ti powder, Al powder and Sn powder respectively, put the weighed powders into a ball mill jar filled with ethanol and agate balls for ball milling, the speed is 350r / min, and the ball milling time is 4h. Put the beaker containing the mixed powder into a drying oven at 60 °C for at least 24 h.

[0015] 2. Take an appropriate amount of dried black powder and put it into a steel mold, put the steel mold into a self-spreading device, introduce a tungsten wire from one end of the mold, pass the tungsten wire into an electric current to ignite the powder, and then react through the powder itself The released heat maintains the energy necessary for the reaction, and the reaction rate is very fast. More than 50 grams of material can be reacted in less than 10 seconds, and finally a black porous irregula...

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Abstract

The invention provides a method for synthesizing a Ti-Al-Sn powder body material through a self-propagating reaction. Ti power, Al power and Sn power are used as raw materials, are evenly mixed through a planetary ball mill, then put into a drying box for drying; the dried powder is put into a steel mould and is conducted with current through a tungsten filament for ignition to synthesize the Ti5Al2.5Sn powder body material. The whole process has the characteristics of simple and easy-to-learn operation, low energy consumption, easy equipment requirement and the like and provides possibility for rapidly preparing mass Ti-Al-Sn powder body materials.

Description

1. Technical field [0001] The invention relates to a method for preparing a material, in particular to a method for synthesizing a Ti-Al-Sn composite powder material by a high-temperature self-propagating reaction. 2. Background technology [0002] With the development of marine technology and aerospace industry, Ti 5 al 2.5 As a representative low-temperature alloy, Sn has attracted more and more attention due to its excellent low-temperature properties. The low-temperature titanium alloy TA7 (Ti-5Al-2.5Sn) has a HCP crystal structure, and its strength increases with the decrease of temperature, but its plasticity does not change much. It can still maintain good ductility and toughness at low temperatures, avoiding the cold brittleness of metals, and is an ideal material for low-temperature containers, storage tanks and other equipment. Mainly used in aero-engines, aerospace pressure vessels, engine casings, etc. [0003] At present, the method of preparing this kind of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/14C22C1/04
Inventor 乔英杰王家华张晓红
Owner HARBIN ENG UNIV
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