Al-V-B refining agent for cast aluminum-silicon alloy, preparation method and application thereof

A casting aluminum-silicon alloy and refining agent technology, which is applied in the field of casting aluminum-silicon alloy refining agent and Al-V-B refining agent for casting aluminum-silicon alloy, which can solve cumbersome operation, unsatisfactory application requirements, long time, etc. problems, to achieve the effect of simple preparation conditions, excellent refinement effect and convenient operation

Active Publication Date: 2019-08-23
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. The recognized standard of the aluminum industry is ≤220μm (G.P.Jones, J.Pearson, Factors affecting the Grain-Refinement of aluminum using titanium and boron additives, Metallurgical Transactions B, 7B (1976), 223-224.), the Al prepared by this technology After -2V-2B refiner is added to Al-7Si alloy, the grain size of α-Al in the sample is reduced to 450μm, which is more than 2 times o

Method used

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  • Al-V-B refining agent for cast aluminum-silicon alloy, preparation method and application thereof
  • Al-V-B refining agent for cast aluminum-silicon alloy, preparation method and application thereof
  • Al-V-B refining agent for cast aluminum-silicon alloy, preparation method and application thereof

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Embodiment 1

[0042] In this embodiment, an Al-V-B refining agent for casting aluminum-silicon alloy, its chemical element composition and mass percentage are: aluminum: 94%; vanadium: 3.0%; boron: 3.0%; the casting aluminum-silicon alloy The Al-V-B refiner is used as the alloy material, and its phase composition is composed of α-Al aluminum solid solution as a matrix and particle particles for refining, and the particle particles are dispersed in the α-Al matrix. The mass percent of pure vanadium in the Al-V-B refining agent for casting aluminum-silicon alloy in this embodiment is 3%, the mass percent of pure boron is 3%, and the balance is pure aluminum, which is Al-3V-3B as the refining agent .

[0043] In this embodiment, a method for preparing an Al-V-B refiner for casting aluminum-silicon alloys, the specific preparation method includes the following steps:

[0044] (1) Preparation of raw materials:

[0045] Using KBF 4 Powder is as B source, adopts Al block and V powder as metal r...

Embodiment 2

[0098] This embodiment is basically the same as Embodiment 1, especially in that:

[0099] In this embodiment, an Al-V-B refining agent for casting aluminum-silicon alloy, its chemical element composition and mass percentage are: aluminum: 95.8%; vanadium: 2.1%; boron: 2.1%; the casting aluminum-silicon alloy The Al-V-B refiner is used as the alloy material, and its phase composition is composed of α-Al aluminum solid solution as a matrix and particle particles for refining, and the particle particles are dispersed in the α-Al matrix.

[0100] In this embodiment, a method for preparing an Al-V-B refiner for casting aluminum-silicon alloys, the specific preparation method includes the following steps:

[0101] (1) Preparation of raw materials:

[0102] Using KBF 4 Powder is as B source, adopts Al block and V powder as metal raw material, is 95.8% according to aluminum, vanadium is 2.1%; Boron is 2.1% chemical element composition and mass percentage, takes by weighing 140.6 gr...

Embodiment 3

[0109] This embodiment is basically the same as the previous embodiment, and the special features are:

[0110] In this embodiment, an Al-10V-10B refining agent for casting aluminum-silicon alloy, its chemical element composition and mass percentage are: aluminum: 80.0%; vanadium: 10.0%; boron: 10.0%; Al-10V-10B refiner for silicon alloy is the alloy material, and its phase composition is composed of α-Al aluminum solid solution as the matrix and particle particles that act as a refiner, and the particle particles are dispersed in the α-Al matrix .

[0111] In this embodiment, a preparation method of Al-10V-10B refiner for casting aluminum-silicon alloy, the specific preparation method includes the following steps:

[0112] (1) Preparation of raw materials:

[0113] Using KBF 4 Powder is used as B source, adopts Al lump and V powder as metal raw material, is 80.0% according to aluminum, vanadium is 10.0%; Boron is 10.0% chemical element composition and mass percentage, take...

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Abstract

The invention discloses an Al-V-B refining agent for cast aluminum-silicon alloy, a preparation method and application thereof. The Al-V-B refining agent comprises the following chemical elements of,in percentage by mass, 80.0%-95.8% of aluminum, 2.1%-10.0% of vanadium and 2.1%-10.0% of boron; the phase composition of the refining agent is composed of an aluminum solid solution alpha-Al acting asa matrix and particle particles with the particle size of 2-100 microns. The phase of each particle particle comprises a VAl3 phase, a VB2 phase and an AlB2 phase at the same time. In the casting aluminum-silicon alloy application, the grain size of the alpha-Al in the cast aluminum-silicon alloy is refined to be 220 microns or below. The preparation method of the refining agent adopts a villiaumite method and comprises the following steps of weighing raw materials; and smelting the Al-V-B alloy. According to the Al-V-B refining agent, the refining effect can reach 184 microns, and the requirement of the aluminum industry approved standard of less than or equal to 220 microns are met; and the preparation method is simple and convenient, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a refining agent for casting aluminum-silicon alloy, its preparation method and application, in particular to an Al-V-B refining agent for casting aluminum-silicon alloy, its preparation method and application, and is applied in the technical field of aluminum alloy smelting . Background technique [0002] Cast aluminum-silicon alloys are widely used in food packaging, transportation and construction materials due to their good mechanical properties and casting properties. Refining the grains of the alloy can obtain a dense alloy structure, and at the same time reduce the tendency of hot cracking and segregation of the casting, and reduce the porosity, thereby improving the overall performance of the alloy. The most commonly used and effective refinement method is to add a refiner, among which Al-5Ti-B refiner has been widely used. However, this refiner is not suitable for refining aluminum-silicon alloys with a Si content gr...

Claims

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Application Information

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IPC IPC(8): C22C1/06C22C21/00C22C21/02C22C1/10C22C1/02
CPCC22C1/06C22C1/1036C22C21/00C22C21/02
Inventor 李谦赵晨曦黎阳
Owner SHANGHAI UNIV
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