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Aluminum titanium carbonitride alloy grain refiner and preparation method thereof

A technology of titanium carbonitride aluminum alloy and grain refiner, which is applied in the field of aluminum and aluminum alloy materials, can solve the problems of easy aggregation and precipitation, coarse particle size, and failure to meet the needs of high-performance aluminum alloys, so as to achieve difficult aggregation and precipitation , The yield is stable and accurate, and the comprehensive cost is low

Inactive Publication Date: 2017-01-11
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the Al-5Ti-1B grain refiner commonly used in industry currently has TiB 2 The shortcomings of coarse particle size, easy aggregation and precipitation, and "poisoning" by refinement can no longer meet the needs of high-performance aluminum alloys in the fields of automobiles, electronics, machinery, and aerospace.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method of the titanium aluminum carbonitride master alloy described in this embodiment is as follows:

[0026] (1) Ingredients

[0027] Use aluminum powder, aluminum ingot and titanium carbonitride as raw materials, and weigh the raw materials according to the composition ratio of the master alloy of aluminum carbonitride and titanium carbonitride;

[0028] (2) Preparation of titanium aluminum carbonitride precast blocks

[0029] The aluminum powder and the titanium carbonitride powder were mixed, and placed in a planetary ball mill for 5 hours of ball milling. The ball-milled powder is hot-pressed in a graphite mold to prepare a prefabricated block. The hot-pressing temperature is 350°C and the holding time is 5 minutes. After cooling, take it out for use;

[0030] (3) Melting

[0031] Put the raw aluminum ingot in a heating furnace to preheat to remove the adsorbed moisture and gas, then heat it under the protection of an inert gas or add a covering...

Embodiment 2

[0035] The preparation method of the titanium aluminum carbonitride master alloy described in this embodiment is as follows:

[0036] (1) Ingredients

[0037] Use aluminum powder, aluminum ingot and titanium carbonitride as raw materials, and weigh the raw materials according to the composition ratio of the master alloy of aluminum carbonitride and titanium carbonitride;

[0038] (2) Preparation of titanium aluminum carbonitride precast blocks

[0039] The aluminum powder and the titanium carbonitride powder were mixed, and placed in a planetary ball mill for ball milling for 6 hours. The ball-milled powder is hot-pressed in a graphite mold to prepare a prefabricated block. The hot-pressing temperature is 400°C, the holding time is 10 minutes, and it is taken out after cooling;

[0040] (3) Melting

[0041] Put the raw aluminum ingot in a heating furnace to preheat to remove the adsorbed moisture and gas, then heat it under the protection of an inert gas or add a covering a...

Embodiment 3

[0045] The preparation method of the titanium aluminum carbonitride master alloy described in this embodiment is as follows:

[0046] (1) Ingredients

[0047] Use aluminum powder, aluminum ingot and titanium carbonitride as raw materials, and weigh the raw materials according to the composition ratio of the master alloy of aluminum carbonitride and titanium carbonitride;

[0048] (2) Preparation of titanium aluminum carbonitride precast blocks

[0049] The aluminum powder and the titanium carbonitride powder were mixed, and placed in a planetary ball mill for 7 hours of ball milling. The ball-milled powder is hot-pressed in a graphite mold to prepare a prefabricated block. The hot-pressing temperature is 450°C, the holding time is 20 minutes, and it is taken out after cooling;

[0050] (3) Melting

[0051] Put the raw aluminum ingot in a heating furnace to preheat to remove the adsorbed moisture and gas, then heat it under the protection of an inert gas or add a covering ag...

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Abstract

The invention relates to an aluminum titanium carbonitride alloy grain refiner which contains 1%-10% of titanium carbonitride and 90%-99% of aluminum. A preparation method comprises the following steps: (1) dosing; (2) preparing an aluminum titanium carbonitride precast block; (3) smelting, putting aluminum into a heating furnace for preheating, heating under the inert gas protection or under the condition of adding covering agent, fully smelting aluminum to obtain molten aluminum, and then pressing the aluminum titanium carbonitride precast block into the molten aluminum at 800-1100 DEG C, after the aluminum titanium carbonitride precast block is fully smelted, adjusting the temperature of the molten aluminum to 800 DEG C and stirring for 5-30 min while keeping temperature, then adjusting the temperature of the molten aluminum to 700-720 DEG C, adding a refining agent being 0.4%-1.2% of the total mass into the molten aluminum, stirring and refining for 5-20 min, standing by and keeping temperature for 5-10 min, thereby obtaining an aluminum titanium carbonitride intermediate alloy solution; (4) pouring. The aluminum titanium carbonitride alloy grain refiner provided by the invention has excellent grain refining capacity and can further promote the comprehensive mechanical property of aluminum and aluminum alloy.

Description

technical field [0001] The invention belongs to the field of aluminum and aluminum alloy materials, in particular to an aluminum carbonitride titanium aluminum alloy grain refiner and a preparation method thereof. Background technique [0002] Aluminum alloy has the advantages of light weight, high specific strength, good electrical and thermal conductivity, and strong corrosion resistance. It is widely used in various fields such as machinery manufacturing, transportation machinery, power machinery, chemical industry, aerospace and military. With the development of industries such as automobiles, electronics, and machinery in the direction of lightweight, precision, and intelligence, especially the rapid development of aerospace, higher requirements are placed on the comprehensive mechanical properties of aluminum alloys. Therefore, how to improve the comprehensive mechanical properties of aluminum alloys has become the focus and difficulty in the research field of aluminum...

Claims

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Application Information

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IPC IPC(8): C22C1/03C22C1/06C22C1/10C22C32/00C22C21/00
CPCC22C1/03C22C1/06C22C1/1036C22C21/00C22C32/0047
Inventor 刘颖叶金文安旭光李荀
Owner SICHUAN UNIV
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