Alloy auxiliary material and preparation method thereof

A technology for auxiliary materials and alloys, applied in the field of alloy auxiliary materials and their preparation, can solve the problems of inability to perform simultaneous metamorphic treatment, poor effect of modifiers, slag and degassing, etc. harm reduction effect

Inactive Publication Date: 2019-05-14
ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention: Aiming at the problems that the current A357 aluminum alloy smelting process cannot be simultaneously modified and deslagged and degassed, and the commonly used modified agents are not effective and easy to be burned, the present invention provides an alloy auxiliary material to solve the problem of above question

Method used

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  • Alloy auxiliary material and preparation method thereof
  • Alloy auxiliary material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Prepare alloy auxiliary materials as follows:

[0035] 1. Preparation of raw materials:

[0036] The A357 alloy is used as the smelting object, and its components are: Si 6.7wt%, Fe 0.05wt%, Cu 0.04wt%, Mg0.56wt%, Mn 0.01wt%, Zn 0.03wt%, Ti 0.05wt%, impurity content ≤ 0.1wt%, the balance is Al.

[0037] The purity of barium nitrate, sodium nitrate, aluminum carbonate, manganese acetate, aluminum nitrate, potassium chloride, sodium chloride, sodium fluoroaluminate, strontium carbonate, and tantalum carbide are all greater than 99.9wt%, particle size is 200 mesh, and tar is high temperature Coal tar.

[0038] Sepiolite is alpha sepiolite, and the components of sepiolite powder are: 0.01wt% MnO, 21.22wt% MgO, 0.18wt% Al 2 O 3 ,0.05wt%K 2 O, 0.034wt% Na 2 O, 0.068wt% NiO, 0.042wt% FeO, 0.727wt% Fe 2 O 3 , 0.784wt% CaO, 0.092wt% Cr2O3, 0.022wt% BaO, the balance is SiO 2 ; The particle size of sepiolite powder is 100 mesh.

[0039] 2. Preparation of alloy auxiliary materia...

Embodiment 2

[0049] Example 2: Prepare alloy auxiliary materials as follows:

[0050] 1. Preparation of raw materials:

[0051] A357 alloy is used as the smelting object, and its components are: Si 7.4wt%, Fe 0.08wt%, Cu 0.08wt%, Mg 0.66wt%, Mn 0.03wt%, Zn 0.02wt%, Ti 0.23wt%, impurity content ≤ 0.1wt%, the balance is Al.

[0052] The purity of barium nitrate, sodium nitrate, aluminum carbonate, manganese acetate, aluminum nitrate, potassium chloride, sodium chloride, sodium fluoroaluminate, strontium carbonate, and tantalum carbide are all greater than 99.9wt%, the particle size is 300 mesh, and the tar is high temperature Coal tar.

[0053] Sepiolite is alpha sepiolite, and the components of sepiolite powder are: 0.067wt% MnO, 33.74wt% MgO, 0.33wt% Al 2 O 3 , 0.116wt%K 2 O, 0.117wt% Na 2 O, 0.097wt% NiO, 0.321wt% FeO, 1.543wt% Fe 2 O 3 , 1.449wt% CaO, 0.231wt% Cr2O3, 0.067wt% BaO, the balance is SiO 2 ; The particle size of sepiolite powder is 200 mesh.

[0054] 2. Preparation of alloy auxiliary...

Embodiment 3

[0064] Example 3: Prepare alloy auxiliary materials as follows:

[0065] 1. Preparation of raw materials:

[0066] A357 alloy is used as the smelting object, and its components are: Si 7.1wt%, Fe 0.065wt%, Cu 0.06wt%, Mg 0.61wt%, Mn 0.02wt%, Zn 0.01wt%, Ti 0.14wt%, impurity content ≤ 0.1wt%, the balance is Al.

[0067] The purity of barium nitrate, sodium nitrate, aluminum carbonate, manganese acetate, aluminum nitrate, potassium chloride, sodium chloride, sodium fluoroaluminate, strontium carbonate, and tantalum carbide are all greater than 99.9wt%, the particle size is 250 mesh, and the tar is high temperature Coal tar.

[0068] Sepiolite is alpha sepiolite, and the components of sepiolite powder are: 0.038wt% MnO, 27.43wt% MgO, 0.25wt% Al 2 O 3 , 0.058wt%K 2 O, 0.077wt% Na 2 O, 0.082wt% NiO, 0.153wt% FeO, 1.154wt% Fe 2 O 3 , 1.023wt% CaO, 0.165wt% Cr 2 O 3 , 0.044wt% BaO, the balance is SiO 2 ; The particle size of sepiolite powder is 150 mesh.

[0069] 2. Preparation of alloy auxi...

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Abstract

The invention discloses an alloy auxiliary material. The alloy auxiliary material is prepared from the following components in percentage by weight: 3%-8% of nitrate barium, 11%-15% of sodium nitrate,3%-9% of aluminum carbonate, 0.5%-1.5% of manganese acetate, 3%-11% of aluminum nitrate, 11%-15% of potassium chloride, 8%-12% of sodium chloride, 12%-18% of sepiolite composite powder, and the balance of sodium fluoraluminate; and a rare earth complex and the manganese acetate can change the shape and size of a harmful phase formed by impurity elements, various metamorphic elements in the sepiolite composite powder can effectively refine coarse primary silicon, degassing and deslagging can further be conducted while modification treatment is conducted, and the smelting efficiency is improved. According to the preparation method, gaps among powder raw materials are narrowed by using an extrusion calcination method, sodium, strontium, aluminum, potassium, neodymium and other metal salts advantageously form metal complexes, metamorphic effects of the various elements are superimposed, the complexes are more stable, the burning loss of an individual alterant during high temperature smelting is prevented or slowed down, and the effective metamorphism time is prolonged.

Description

Technical field [0001] The invention relates to the field of alloy modifiers, in particular to an alloy auxiliary material and a preparation method thereof. Background technique [0002] The silicon phase in the aluminum-silicon alloy eutectic will grow into flakes under spontaneous growth conditions, and even thick polygonal tabular silicon phases will appear. These silicon phases will severely split the Al matrix at the tips and corners of the Si phase. Causes stress concentration at the location, the alloy is easy to crack along the grain boundary, or the tabular Si itself cracks to form cracks, which makes the alloy brittle, the mechanical properties, especially the elongation, are significantly reduced, and the cutting function is not good. In order to change the existing state of silicon and improve the mechanical properties of the alloy, modification treatment technology has been used for a long time. [0003] The elements that have a modification effect on eutectic silicon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/06C22C21/02
Inventor 赵浩峰于鹏张椿英夏俊
Owner ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE
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