Composite salt material and method for performing modification treatment on aluminum alloy by utilizing same

A compound salt and aluminum alloy technology, which is applied in the field of aluminum alloy modifying agent, can solve the problems of difficult control of preparation process, large amount of industrial production, poor effect of modifying agent, etc., so as to improve the onset time of modification, refine crystalline silicon, The effect of a short incubation period for deterioration

Inactive Publication Date: 2019-06-25
ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention: Aiming at the problems that the commonly used modifiers are not effective and easy to be burned, the present invention provides a compound salt material to solve the above problems, and at the same time overcome the slow melting, long incubation period and difficult preparation of the casting intermediate alloy modifiers. The defects that the process is difficult to control and the amount of industrial production is large

Method used

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  • Composite salt material and method for performing modification treatment on aluminum alloy by utilizing same
  • Composite salt material and method for performing modification treatment on aluminum alloy by utilizing same
  • Composite salt material and method for performing modification treatment on aluminum alloy by utilizing same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: prepare compound salt material as follows:

[0032] 1. Preparation of raw materials:

[0033] Sodium hexafluoroaluminate, potassium fluozirconate, aluminum chromate, zinc fluoride, manganese acetate, manganese nitrate, potassium chloride, samarium fluoride, sodium chloride, titanium carbide, titanium oxide, barium oxide do not contain crystal water And the purity is greater than 99.9wt%, and the particle size is 150-200 mesh;

[0034] The composition of illite powder is: Al 2 o 3 is 20.11wt%, loss on ignition is 3.65wt%, Fe 2 o 3 1.98wt%, MgO 0.83wt%, CaO 0.11wt%, TiO 2 0.59wt% FeO 0.12wt% SO 3 +MnO+P 2 o 5 +ZrO 2 +SrO≤0.23wt%, K 2 O 7.24wt%, Na 2 O is 0.55wt%, the balance is SiO 2 ; The particle size of the illite powder is 50 mesh.

[0035] The composition of the hypereutectic aluminum-silicon alloy is Si 18%, Ni 0.02%, Fe 0.1%, Mg 0.08%, Cu 0.1%, Mn 0.04%, Zn 0.09% by weight, and the remaining impurities are ≤0.2%, and the balance is Al; ...

Embodiment 2

[0046] Embodiment 2: prepare compound salt material as follows:

[0047] 1. Preparation of raw materials:

[0048] Sodium hexafluoroaluminate, potassium fluozirconate, aluminum chromate, zinc fluoride, manganese acetate, manganese nitrate, potassium chloride, samarium fluoride, sodium chloride, titanium carbide, titanium oxide, barium oxide do not contain crystal water And the purity is greater than 99.9wt%, and the particle size is 200 mesh;

[0049] The composition of illite powder is: Al 2 o 3 is 24.47wt%, loss on ignition is 6.57wt%, Fe 2 o 3 3.78wt%, MgO 1.72wt%, CaO 0.27wt%, TiO 2 0.88wt% FeO 0.67wt% SO 3 +MnO+P 2 o 5 +ZrO 2 +SrO≤0.23wt%, K 2 O 10.45wt%, Na 2 O is 1.34wt%, the balance is SiO 2 ; The particle size of the illite powder is 100 mesh.

[0050] The composition of the hypereutectic aluminum-silicon alloy is Si 22%, Ni 0.16%, Fe 0.3%, Mg 0.24%, Cu 0.2%, Mn 0.08%, Zn 0.11% by weight, and the remaining impurities are ≤0.2%, and the balance is Al;

...

Embodiment 3

[0061] Embodiment 3: prepare compound salt material as follows:

[0062] 1. Preparation of raw materials:

[0063] Sodium hexafluoroaluminate, potassium fluozirconate, aluminum chromate, zinc fluoride, manganese acetate, manganese nitrate, potassium chloride, samarium fluoride, sodium chloride, titanium carbide, titanium oxide, barium oxide do not contain crystal water And the purity is greater than 99.9wt%, and the particle size is 170 mesh;

[0064] The composition of illite powder is: Al 2 o 3 is 22.37wt%, loss on ignition is 5.09wt%, Fe 2 o 3 2.88wt%, MgO 1.26wt%, CaO 0.21wt%, TiO 2 0.69wt% FeO 0.42wt% SO 3 +MnO+P 2 o 5 +ZrO 2 +SrO≤0.23wt%, K 2 O is 8.93wt%, Na 2 O is 0.96wt%, the balance is SiO 2 ; The particle size of the illite powder is 80 mesh.

[0065] The composition of the hypereutectic aluminum-silicon alloy is Si 20%, Ni 0.09%, Fe 0.2%, Mg 0.16%, Cu 0.15%, Mn 0.06%, Zn 0.10% by weight, and the remaining impurities are ≤0.2%, and the balance is Al; ...

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Abstract

The invention discloses a composite salt material and a method for performing modification treatment on aluminum alloy by utilizing same. The composite salt material is prepared through the followingraw materials in percentage by weight: 13-18% of sodium fluoroaluminate, 3-7% of potassium fluozirconate, 5-9% of aluminiumchromat, 0.3-1.2% of zinc fluoride, 0.5-0.8% of manganese acetate, 3-6% of manganous nitrate, 11-15% of potassium chloride, 2-6% of samaric fluoride, 2-7% of sintering powder, and the balance sodium chloride, wherein illite in the sintering powder can be treated as a modification agent carrier for degassing, and the enriched aluminum oxide and silicon oxide are used to obviously improve the alloy hardness; various modification elements such as sodium, barium, samarium anddysprosium are combined, so that the modification effect is outstanding. The composite salt material is applicable to a high- and low-temperature molten aluminum alloy mixing modification method for modifying aluminum alloy; the properties of the modification method can be effectively adopted; and the two methods complement each other; and high-temperature refining for degassing is avoided, so that the mechanical performance of an aluminum alloy product can be obviously improved.

Description

technical field [0001] The invention relates to the field of aluminum alloy modifiers, in particular to a compound salt material and a method for modifying the compound salt material. Background technique [0002] The silicon structure of aluminum alloy is composed of coarse five-lobed star-shaped primary silicon and long needle-shaped eutectic silicon. These silicon phases will severely split the Al matrix and cause stress concentration at the tip and corners of the Si phase. The alloy is easy to form cracks along the grain boundaries, or the plate-shaped Si itself cracks, which makes the alloy brittle, the mechanical properties, especially the elongation, are significantly reduced, and the cutting performance is not good. In order to change the existing state of silicon and improve the mechanical properties of the alloy, a modifier is generally added to the alloy to refine the primary silicon and eutectic silicon. [0003] There are many studies on aluminum alloy modifier...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C1/06C22C21/04C22F1/043
Inventor 赵浩峰于鹏夏俊张椿英
Owner ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE
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