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Aluminum-manganese-boron intermediate alloy and preparation method thereof

A master alloy, al-b technology, applied in the field of modifiers, can solve the problems of increased difficulty in controlling the composition of aluminum alloys, high cost of preparation of master alloys, and increased cost of deterioration, etc., to reduce growth time, control alloy composition, and inhibit long-term big effect

Inactive Publication Date: 2018-06-22
GUANGDONG INST OF MATERIALS & PROCESSING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the preparation cost of the master alloy of [Mn] agent and [B] agent is relatively high, and the dosage is large when they are added separately, which further increases the cost of deterioration
At the same time, there may be differences in the content of impurity elements in the two types of master alloys, which makes it more difficult to control the composition of aluminum alloys with lower requirements for impurity elements, which further limits the application of step-by-step compound addition of [Mn] agent and [B] agent

Method used

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  • Aluminum-manganese-boron intermediate alloy and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Weigh the raw materials according to the mass fraction of 70% Al-Mn master alloy, 10% Al-B master alloy and 20% industrial pure aluminum. Among them, the mass percentage of Mn in the Al-Mn master alloy is 40%, and Al- The mass percentage content of B in the B master alloy is 10%, and the purity of industrial pure aluminum is 99.5%;

[0016] (2) Put the Al-Mn master alloy and industrial pure aluminum in an intermediate frequency furnace and heat it to 500℃, keep it for 60 minutes, and then heat it to 950℃;

[0017] (3) After the Al-Mn master alloy is completely melted, the temperature is reduced to 900°C, and then the Al-B master alloy is added;

[0018] (4) After the Al-B master alloy is completely melted, it is refined, kept for 30 minutes and then poured into an ingot to obtain an aluminum-manganese-boron master alloy;

[0019] (5) Test the chemical composition of aluminum-manganese-boron master alloy.

Embodiment 2

[0021] (1) Weigh the raw materials according to the mass fraction of 70% Al-Mn master alloy, 20% Al-B master alloy and 10% industrial pure aluminum. Among them, the mass percentage of Mn in the Al-Mn master alloy is 20%, and Al- The mass percentage of B in the B master alloy is 8%, and the purity of industrial pure aluminum is 99.5%;

[0022] (2) Put the Al-Mn master alloy and industrial pure aluminum in an intermediate frequency furnace and heat it to 500°C, keep it for 60 minutes, and then heat it to 900°C;

[0023] (3) After the Al-Mn master alloy is completely melted, the temperature is reduced to 850℃, and then the Al-B master alloy is added;

[0024] (4) After the Al-B master alloy is completely melted, it is refined, kept for 30 minutes and then poured into an ingot to obtain an aluminum-manganese-boron master alloy;

[0025] (5) Test the chemical composition of aluminum-manganese-boron master alloy.

Embodiment 3

[0027] (1) Weigh the raw materials according to the mass fraction of 75% Al-Mn master alloy, 15% Al-B master alloy and 10% industrial pure aluminum. The mass percentage of Mn in the Al-Mn master alloy is 10%, and Al- The mass percentage content of B in the B master alloy is 5%, and the purity of industrial pure aluminum is 99.5%;

[0028] (2) Put the Al-Mn master alloy and industrial pure aluminum in an intermediate frequency furnace and heat it to 500℃, keep it for 60 minutes, and then heat it to 850℃;

[0029] (3) After the Al-Mn master alloy is completely melted, the temperature is reduced to 800°C, and then the Al-B master alloy is added;

[0030] (4) After the Al-B master alloy is completely melted, it is refined, kept for 30 minutes and then poured into an ingot to obtain an aluminum-manganese-boron master alloy;

[0031] (5) Test the chemical composition of aluminum-manganese-boron master alloy.

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Abstract

The invention discloses aluminum-manganese-boron intermediate alloy and a preparation method thereof. The intermediate alloy comprises the following components of, by mass, 60.6-95.1% of Al, 4.5-36% of Mn, 0.1-3.0% of B, 0-0.15% of Fe, 0-0.10% of Si and 0-0.15% of the balance impurity elements. The aluminum-manganese-boron intermediate alloy is adopted as an iron-enriched phase alterant, thus, needle-like iron-enriched phases and primary iron phases can be completely eliminated, uniform iron-enriched phases in the Chinese character shape are obtained, and in addition, the total adding amount of the intermediate alloy which compositely is added with a Mn agent and a B agent step by step can be substantially decreased; and meanwhile, technological steps are decreased, so that the alloy components are controlled advantageously, and the aluminum-manganese-boron intermediate alloy is more suitable for industrial production.

Description

Technical field [0001] The invention relates to an iron-rich phase modifier in aluminum and aluminum alloy materials, in particular to an aluminum-manganese-boron intermediate alloy and a preparation method thereof. Background technique [0002] Iron is the most common impurity element in aluminum alloys. Because the maximum solubility of iron in aluminum solids at room temperature is 0.05wt.%, it is only 1 / 100~1 / 34 of the maximum solubility in aluminum melt. Therefore, iron basically exists in the form of brittle and hard iron-rich phase in aluminum alloys. According to the crystal structure of the iron-rich phase, it can be divided into α-Fe phase and β-Fe phase. The β-Fe phase is a monoclinic structure with a long and narrow needle-like shape, which splits the aluminum matrix when stressed and becomes the source of cracks. Extending along the length of the iron-rich phase greatly damages the plasticity of the aluminum alloy. The α-Fe phase has a body-centered cubic structure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C21/00
CPCC22C1/026C22C1/03C22C21/00
Inventor 宋东福王顺成康跃华郑开宏甘春雷杨莉
Owner GUANGDONG INST OF MATERIALS & PROCESSING