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Technique for preparing composite material of aluminum based surface enhanced by inner generated grains through powered supresonic method

A surface composite material and particle reinforced aluminum technology, which is applied in the coating process of metal materials, coatings, etc., can solve the problems of size and shape restrictions, no application of particle reinforced surface composite materials, and the reinforcement phase is easily damaged.

Inactive Publication Date: 2007-05-09
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The powder metallurgy method is characterized by stable process and good performance, but the disadvantages are high cost and certain restrictions on the shape and size of materials.
The outstanding advantages of the squeeze casting method are stable process, high production efficiency, compact structure, and excellent performance. The disadvantage is that the reinforcement phase is easily damaged when the process parameters are improperly selected and controlled. Suitable for metal substrates with low melting point
However, ultrasonic treatment technology has not been applied to the preparation of particle-reinforced surface composites.

Method used

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  • Technique for preparing composite material of aluminum based surface enhanced by inner generated grains through powered supresonic method
  • Technique for preparing composite material of aluminum based surface enhanced by inner generated grains through powered supresonic method
  • Technique for preparing composite material of aluminum based surface enhanced by inner generated grains through powered supresonic method

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Experimental program
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Embodiment Construction

[0024] 1. To obtain a particle-reinforced layer with a surface layer of 5-6 mm, the TiAl should be reinforced according to the endogenous particles to be added 3 Phase content, complete the experiment under the corresponding process parameters.

[0025] 2. K used 2 TiF 6 The salt is commercial salt, and the pure aluminum is commercial aluminum.

[0026] 3. According to the size of the crucible to smelt pure aluminum, choose an appropriate amount of pure aluminum ingots of 320-350g,

[0027] 4. To obtain 8-10% TiAl 3 Endogenous reinforcement phase, so it is necessary to obtain 32~35g of TiAl 3 Mutually.

[0028] 5. According to the formula: , the same mole of TiAl 3 Phases require the same moles of K 2 TiF 6 Salt, so about 55-65g of K is needed 2 TiF 6 Salt.

[0029] 6. Put the pure aluminum ingot into a digital resistance heating furnace with a set temperature of 680-780°C for heating, and keep it warm for 20-30 minutes after melting to make the melt reach equ...

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Abstract

This invention relates to a method for preparing a surface composite, especially an ultrasonic method for preparing TiAl3 inner-particle-reinforced Al-based surface composite. The method comprises: adding certain amounts of K2TiF6 salt and pure Al into a crucible according to the crucible volume as well as the desired surface layer thickness, melting, reacting to obtain melt containing TiAl3 particles, placing the crucible in an ultrasonic device, and treating ultrasonically so that TiAl3 particles move toward the surface to obtain inner-particle-reinforced Al-based surface composite with different surface layer thickness. This invention has such advantages as stable process, easy operation, uniform distribution of reinforcing phase in matrix, and good interfacial adhesiveness.

Description

technical field [0001] The invention relates to a preparation process of a surface composite material, in particular to a process for preparing an internal particle-reinforced aluminum-based surface composite material by a power ultrasonic method. Background technique [0002] Ultrasound has many applications in the field of metallurgy and metal materials, such as ultrasonic flaw detection, refinement of solidification structure, removal of gas and solid inclusions in molten metal, reduction of macroscopic and microscopic segregation, etc. In addition, ultrasonic waves can also be used in the production of metal matrix composites. Usually, most metal liquids do not wet the ceramic reinforcement phase, which is a major problem in the preparation process of metal matrix composites, which often causes problems such as unstable preparation process of composite materials, uneven structure distribution, and poor interface bonding strength. Under the action of ultrasonic waves, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02B22D27/00C23C30/00C22C21/00
Inventor 于思荣冯海阔刘耀辉李英龙
Owner JILIN UNIV