Aluminum alloy grain refiner and preparation method thereof

A technology of grain refiner and aluminum alloy, which is applied in the field of metal materials and metal material processing, can solve the problems of poor wettability, unsatisfactory anti-fading performance, and influence on the effect of grain refinement, and achieve short production process , good industrial application prospects, and the effect of improving comprehensive mechanical properties

Inactive Publication Date: 2016-05-04
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used Al-Ti-B master alloy refiner has unsatisfactory anti-fading performance, because its internal TiB 2 Particles are easy to aggregate and precipitate and are easily "poisoned" by atoms such as Zr and Cr, which affect the effect of grain refinement
In addition, the addition of ultrafine cerami

Method used

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  • Aluminum alloy grain refiner and preparation method thereof
  • Aluminum alloy grain refiner and preparation method thereof
  • Aluminum alloy grain refiner and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example 1

[0023] The 30nm TiN powder and the 10μm Ti powder were prepared into powder by mass fraction of 1:1, and the mixed powder was placed in a ball mill, and the Φ10mm ball was used for continuous one-way ball milling for 40 minutes to obtain grain refinement. agent.

Example Embodiment

[0024] Example 2

[0025] The 50nm TiN powder and the 30μm Ti powder are prepared into powder by mass fraction of 1:50, and the mixed powder is put into a ball mill, and the Φ8mm ball is used for continuous one-way ball milling for 60 minutes to obtain grain refinement. agent.

Example Embodiment

[0026] Example 3

[0027] 50nm TiN powder and 30μm Ti powder were prepared into powder by mass fraction of 1:20, and the mixed powder was placed in a ball mill, and Φ8mm balls were used for continuous one-way ball milling for 20 minutes to obtain grain refinement. agent.

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Abstract

The invention provides an aluminum alloy grain refiner and a preparation method thereof. Aiming at the problem of the existing methods adopting Al-Ti-B as an intermediate alloy refiner that the decay resistance is poor and the problem of the existing methods adopting additionally-added ultrafine ceramic granules as a refiner that the wettability is relatively poor, the invention provides a TiN and Ti powder refiner and a preparation method thereof, wherein the refiner is prepared through mixing TiN powder and Ti powder according to a certain part (by mass) ratio and carrying out ball-milling. According to the refiner provided by the invention, the refining of as-cast tissue of aluminum alloy can be achieved, and the comprehensive mechanical properties of the alloy are improved, so that the refiner has a relatively good actual application value. The preparation method provided by the invention is simple and reasonable in process and short in production flow, thereby having a good industrial application prospect.

Description

technical field [0001] The invention belongs to the field of metal materials and metal material processing, and more particularly relates to a refiner with remarkable effect and a preparation method thereof. Background technique [0002] Aluminum alloy has high strength and good plasticity. It is an indispensable and important structural material for many military and civilian transportation, home improvement and other industries. It has an important strategic position in national defense construction and national economic development. In industrial production, the casting process is generally used to make billets. Due to the high degree of alloying and the wide two-phase area, coarse grains are prone to occur, and a large number of non-equilibrium eutectic structures will be generated at the grain boundaries and dendrite boundaries, and the dendrite segregation is serious, which affects the casting. Subsequent processing of ingots and product organization and properties. T...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C1/06C22C21/00
CPCC22C1/026C22C1/06C22C21/00
Inventor 蔡启舟李欣蔚赵炳怡李冰肖亚婷
Owner HUAZHONG UNIV OF SCI & TECH
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