Preparation method of high-quality Al-Ti-B-Sr master alloy composite refining modifier

A technology of al-ti-b-sr, refining modifier, used in materials and metallurgy, preparation of high-quality Al-Ti-B-Sr master alloy composite refining modifier, high-quality Al-Ti-B- In the field of Sr master alloy composite refining modifier, it can solve the problems of high reaction temperature, high metal Sr activity, affecting refining and modification effects, etc., and achieve the effect of high refining performance.

Active Publication Date: 2013-06-26
HUNAN JINLIANXING SPECIAL MATERIALS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process has obvious disadvantages: First, due to the high reaction temperature of Sr and Al liquid, a large amount of energy needs to be consumed to increase the melt temperature; second, the activity of metal Sr is very high, and the reaction of directly adding metal Sr at high temperature The burning loss is very large, which reduces the Al in the alloy 4 The amount of Sr phase increases the cost of deterioration; again, because the Al-Ti-B alloy is remelted from the finished product, it is impossible to control its Al in the preparation of the Al-Ti-B-Sr master alloy. 3 Ti and TiB 2 The morphology and size of the phase, which in turn affects its refinement and metamorphism

Method used

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  • Preparation method of high-quality Al-Ti-B-Sr master alloy composite refining modifier
  • Preparation method of high-quality Al-Ti-B-Sr master alloy composite refining modifier
  • Preparation method of high-quality Al-Ti-B-Sr master alloy composite refining modifier

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Embodiment 1

[0047] Embodiment 1: the manufacture of high-quality Al-5Ti-1B-10Sr master alloy wire rod

[0048] Melt 522kg of aluminum ingots with a purity of 99.7% in an aluminum melting furnace and heat them to 736°C, then pour them into an intermediate frequency induction furnace to remove impurities and oxide films on the surface of the molten aluminum and prepare for the alloying process. Weigh 100kg of K with a purity of 98% 2 TiF 6 and 100kg (for the required KBF 4 80% of the total) KBF with a purity of 98% 4 Ingredients, mix well. Weigh the K just now 2 TiF 6 +KBF 4 The mixture is added to the molten aluminum at a speed of 24kg / min, accompanied by strong stirring. After the first step of feeding is completed, continue to stir until the sampling and analysis components are qualified, and then weigh 161kg of K with a purity of 98% for the second time. 2 TiF 6 and 25kg of KBF with a purity of 98% 4 Mix the raw materials and add molten aluminum at a speed of 22kg / min, accompa...

Embodiment 2

[0052] Embodiment 2: the manufacture of high-quality Al-5Ti-1B-5Sr alloy wire rod

[0053] Melt 505kg of aluminum ingots with a purity of 99.7% in an aluminum melting furnace and heat them to 736°C, then pour them into an intermediate frequency induction furnace to remove impurities and oxide films on the surface of the molten aluminum and prepare for the alloying process. Weigh 65kg of K with a purity of 98% 2 TiF 6 and 65kg (for required KBF 4 80% of the total) KBF with a purity of 98% 4 Ingredients, mix well. Weigh the K just now 2 TiF 6 +KBF 4 The mixture is added to the molten aluminum at a speed of 24kg / min, accompanied by strong stirring. After the first step of feeding is completed, continue to stir until the sampling analysis composition is qualified, then weigh 104kg of K with a purity of 98% for the second time. 2 TiF 6 and 16kg of KBF with a purity of 98% 4 Mix the raw materials and add molten aluminum at a speed of 22kg / min, accompanied by strong stirrin...

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Abstract

The invention relates to a preparation method of a high-quality Al-Ti-B-Sr master alloy composite refining modifier. The preparation method comprises the following steps: firstly melting a pure aluminum ingot in an aluminum melting furnace, and then pouring into a medium-frequency induction furnace to be ready for alloying; then weighing K2TiF6 and KBF4 raw materials, uniformly mixing, and pouring into the molten aluminum to be alloyed in the medium-frequency furnace; performing reaction for a certain period of time, then pouring the remaining mixture of K2TiF6 and KBF4 into an aluminum melt, and pouring away water granulated slag after the end of the reaction; performing degassing and re-deslagging treatment, and then gradually adding a certain weight of Al-20Sr alloy wires; performing stirring, re-deslagging and degassing treatment, and directly pouring to form Al-Ti-B-Sr alloy rods; and then sending the alloy rods onto an extruding machine to perform sectional area large-deformation thermal extrusion treatment and finally obtaining the Al-Ti-B-Sr master alloy composite refining modifier wires with the diameter of 9.5mm. The preparation method is characterized by combining a three-step charging method and a thermal extrusion molding process.

Description

technical field [0001] The invention belongs to the material and metallurgical technology in the field of new material technology, and relates to a preparation method of a high-quality Al-Ti-B-Sr master alloy compound refinement modifier, specifically by improving the traditional production process and using the "three-step feeding method" " and "hot extrusion" process to prepare high-quality Al-Ti-B-Sr master alloy composite refinement modifier. Background technique [0002] Due to the advantages of low density, high specific strength, good welding performance, low thermal expansion coefficient, and excellent corrosion resistance, heat resistance and wear resistance, Al-Si alloy has been used in high-tech fields such as machinery industry, automobile industry, aviation and military industry. Has been widely used. Especially aluminum alloy castings and die castings, almost more than 90% are made of Al-Si alloys. During the casting process, Al-Si alloys generally generate d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/03C22C1/06B21C23/08
Inventor 廖成伟陈建春陈欢罗成志潘春旭
Owner HUNAN JINLIANXING SPECIAL MATERIALS CO LTD
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