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Inorganic treatment agent, and method for carrying out aluminum alloy modification treatment by utilizing inorganic treatment agent

A treatment agent and an inorganic technology, which is applied in the field of aluminum alloy modifiers, can solve the problems of difficult control of the preparation process, inability to modify the modification at the same time, and poor effect of the modification agent, so as to improve the efficiency of modification treatment, save the step of slag removal, and fine particles Effect

Inactive Publication Date: 2019-05-28
ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention: Aiming at the problems that in the current eutectic aluminum-silicon alloy smelting process, simultaneous modification, slag and gas removal are impossible, and commonly used modification agents are ineffective and easy to burn, the present invention provides an inorganic treatment agent , solve the above problems, and at the same time overcome the defects of slow melting of the casting intermediate alloy modifier, long incubation period, and difficult control of the preparation process

Method used

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  • Inorganic treatment agent, and method for carrying out aluminum alloy modification treatment by utilizing inorganic treatment agent
  • Inorganic treatment agent, and method for carrying out aluminum alloy modification treatment by utilizing inorganic treatment agent
  • Inorganic treatment agent, and method for carrying out aluminum alloy modification treatment by utilizing inorganic treatment agent

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: prepare inorganic treatment agent as follows:

[0034] 1. Preparation of raw materials:

[0035] Sodium oxalate, manganese nitrate, manganese acetate, potassium fluoroaluminate, potassium chloride, sodium chloride, silicon carbide, aluminum oxide, sodium molybdate, europium nitrate, and copper oxide do not contain crystal water and have a purity greater than 99.9 wt%. The particle size is 150 mesh;

[0036] Bentonite is calcium-based bentonite, the composition is: Al 2 o 3 13.24wt%, H 2 O is 4.56wt%, Fe 2 o 3 0.34wt%, MgO 2.22wt%, CaO 1.14wt%, TiO 2 0.09wt%, FeO 0.07wt%, MnO≤0.08wt%, P 2 o 3 0.03wt%, K 2 O+Na 2 O is 0.56wt%, the balance is SiO 2 , the particle size of the bentonite powder is 100 mesh;

[0037] The inert gas is helium or nitrogen.

[0038] The composition of the eutectic aluminum-silicon alloy is Si 17.0%, Fe 0.01%, Ti 0.22%, Mg 0.2%, Cu 4.8%, Mn 0.1%, Zn≤0.03%, Ca≤0.02%, and the balance is Al;

[0039] The lubricant is MoS ...

Embodiment 2

[0051] Embodiment 2: prepare inorganic treatment agent as follows:

[0052] Second, the preparation of raw materials:

[0053] Sodium oxalate, manganese nitrate, manganese acetate, potassium fluoroaluminate, potassium chloride, sodium chloride, silicon carbide, aluminum oxide, sodium molybdate, europium nitrate, and copper oxide do not contain crystal water and have a purity greater than 99.9 wt%. The particle size is 250 mesh;

[0054] Bentonite is calcium-based bentonite or sodium-based bentonite, and its composition is: Al 2 o 3 16.88wt%, H 2 O is 8.23wt%, Fe 2 o 3 1.22wt%, MgO is 4.35wt%, CaO is 2.09wt%, TiO 2 0.22wt%, FeO 0.58wt%, MnO≤0.08wt%, P 2 o 3 0.11wt%, K 2 O+Na 2 O is 1.39wt%, the balance is SiO 2 , the particle size of the bentonite powder is 150 mesh;

[0055] The inert gas is helium or nitrogen.

[0056] The composition of the eutectic aluminum-silicon alloy is Si 18.5%, Fe 0.05%, Ti 0.34%, Mg 0.5%, Cu 5.5%, Mn 0.4%, Zn≤0.03%, Ca≤0.02%, and the ba...

Embodiment 3

[0069] Embodiment 3: prepare inorganic treatment agent as follows:

[0070] 3. Preparation of raw materials:

[0071] Sodium oxalate, manganese nitrate, manganese acetate, potassium fluoroaluminate, potassium chloride, sodium chloride, silicon carbide, aluminum oxide, sodium molybdate, europium nitrate, and copper oxide do not contain crystal water and have a purity greater than 99.9 wt%. The particle size is 200 mesh;

[0072] Bentonite is calcium-based bentonite or sodium-based bentonite, and its composition is: Al 2 o 3 14.89wt%, H 2 O is 6.45wt%, Fe 2 o 3 0.79wt%, MgO 3.01wt%, CaO 1.78wt%, TiO 2 0.14wt%, FeO 0.31wt%, MnO≤0.08wt%, P 2 o 3 0.07wt%, K 2 O+Na 2 O is 0.82wt%, the balance is SiO 2 , The particle size of the bentonite powder is 125 mesh.

[0073] The composition of the eutectic aluminum-silicon alloy is Si 17.8%, Fe 0.03%, Ti 0.28%, Mg 0.35%, Cu 5.1%, Mn 0.25%, Zn≤0.03%, Ca≤0.02%, and the balance is Al;

[0074] The lubricant is MoS 2 Mixture of po...

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Abstract

The invention discloses an inorganic treatment agent, and a method for carrying out aluminum alloy modification treatment by utilizing the inorganic treatment agent. The inorganic treatment agent is prepared from the following raw materials in percentage by weight: 13 to 18 percent of sodium oxalate, 5 to 9 percent of manganese nitrate, 0.5 to 0.8 percent of manganese acetate, 11 to 15 percent ofpotassium fluoroaluminate, 12 to 16 percent of potassium chloride, 12 to 16 percent of inorganic composite powder, and the balance sodium chloride. The inorganic composite powder contains bentonite and rare earth europium sodium molybdate salt, and bentonite can be used as a modificatory carrier for degassing and deslagging, so that the smelting efficiency is improved, and the alloy hardness can be remarkably improved through the rich aluminum oxide and silicon oxide. Through a luminescence property of a europium element, an aluminum alloy can have a luminescence property, so that no luminescent material needs to be coated. The inorganic treatment agent provided by the invention is applied to powder hot extrusion so as to prepare the eutectic aluminum alloy, the characteristic of a powderhot extrusion process can be effectively matched, the modification speed is fast, the modificatory activity is high, the modification effect is stable, no high-temperature refining and degassing is needed, and the mechanical property of an aluminum alloy product is remarkably improved.

Description

technical field [0001] The invention relates to the field of aluminum alloy modification agents, in particular to an inorganic treatment agent and a method for using the inorganic treatment agent for modification treatment. 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...

Claims

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Application Information

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IPC IPC(8): C22C1/06B22F3/20C22F1/043C21D9/00C22C21/04C22C1/04
Inventor 赵浩峰张椿英夏俊于鹏
Owner ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE
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