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Casting method of semi-solid state aluminum alloy cast rod for extrusion molding

A technology of extrusion forming and aluminum alloy, which is applied in the casting field of semi-solid aluminum alloy casting rods, which can solve the problems of easy-cracking surface quality of casting rods, affecting the mechanical properties of materials, waste of raw materials and energy, etc., and achieves short solidification time and high production efficiency. High efficiency and energy saving effect

Inactive Publication Date: 2012-10-31
ASIA PACIFIC LIGHT ALLOY NANTONG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the casting process of traditional semi-solid aluminum alloy casting rods, the following problems often exist due to process defects: deep liquid pockets, uneven temperature distribution, easy cracking of casting rods and poor surface quality; coarse grains affect the mechanical properties of materials ;There are many disadvantages such as the skeleton formed by dendrites, poor material fluidity, and difficulty in subsequent molding processing, which greatly increases the waste of raw materials and energy in production and processing. Therefore, it is very important to invent a new casting method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A method for casting semi-solid aluminum alloy cast rods for extrusion forming, the production steps of aluminum alloy cast rods in the shape casting process are as follows:

[0015] (1) Melt aluminum and its added alloy materials, and control the temperature of molten aluminum to start casting between 740 ° C, and turn on the cooling water;

[0016] (2) During the casting process, the casting temperature is controlled by controlling the height of the molten aluminum on the mold plate, the casting temperature is 680°C, and the temperature difference between the head and the tail of the mold plate is controlled not to exceed 20°C;

[0017] (3) When the molten aluminum is full of the mold plate, turn on the electromagnetic stirring device, the current at the initial stage of casting is 0A, the casting speed is 40mm / min, and the cooling water flow rate is 2800L / min;

[0018] (4) When the casting length reaches 400mm, increase the electromagnetic stirring current and increa...

Embodiment 2

[0021] A method for casting semi-solid aluminum alloy cast rods for extrusion forming, the production steps of aluminum alloy cast rods in the shape casting process are as follows:

[0022] (1) Melt aluminum and its added alloy materials, and control the temperature of molten aluminum to start casting between 760 ° C, and turn on the cooling water;

[0023] (2) During the casting process, the casting temperature is controlled by controlling the height of the molten aluminum on the mold plate, the casting temperature is 690°C, and the temperature difference between the head and the tail of the mold plate is controlled not to exceed 20°C;

[0024] (3) When the molten aluminum is full of the mold plate, turn on the electromagnetic stirring device, the current at the initial stage of casting is 10A, the casting speed is 60mm / min, and the cooling water flow rate is 2800-3000L / min;

[0025] (4) When the casting length reaches 600mm, increase the electromagnetic stirring current and ...

Embodiment 3

[0028] A casting method for extruded semi-solid aluminum alloy casting rods, the production steps of the aluminum alloy casting rods in the molding casting process are as follows:

[0029] (1) Melt aluminum and its added alloy materials, and control the temperature of molten aluminum to start casting at 780°C, and turn on the cooling water;

[0030] (2) During the casting process, the casting temperature is controlled by controlling the height of the molten aluminum on the mold plate, the casting temperature is 700°C, and the temperature difference between the head and the tail of the mold plate is controlled not to exceed 20°C;

[0031] (3) When the molten aluminum is full of the mold plate, turn on the electromagnetic stirring device, the current at the initial stage of casting is 20A, the casting speed is 80mm / min, and the cooling water flow rate is 3000L / min;

[0032] (4) When the casting length reaches 800mm, increase the electromagnetic stirring current and increase the ...

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Abstract

The invention discloses a casting method of a semi-solid state aluminum alloy cast rod for extrusion molding. According to the casting method, alternating current is applied to a solid-liquid coexisting region of metal in a metal solidification process, and the metal is electromagnetically stirred, so that dentritic crystal can be effectively broken to form a spherical micro-particle structure in a matrix; meanwhile, a liquid cavity can be shoaled by violent stirring; the temperature distribution is more uniform; the quality and the mechanical property of the cast rod are effectively improved; and the casting method has the advantages of stable filling, no turbulent flow or splash, low temperature, less latent heat of crystallization, short solidification time, high production efficiency and suitability for wide use in the industry.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal processing, and in particular relates to a casting method for extruded semi-solid aluminum alloy cast rods. Background technique [0002] In the casting process of traditional semi-solid aluminum alloy casting rods, the following problems often exist due to process defects: deep liquid pockets, uneven temperature distribution, easy cracking of casting rods and poor surface quality; coarse grains affect the mechanical properties of materials There are many disadvantages such as the skeleton formed by dendrites, poor material fluidity, and subsequent molding processing difficulties, which greatly increase the waste of raw materials and energy in production and processing. Therefore, it is very important to invent a new casting method. Contents of the invention [0003] Purpose of the invention: The present invention solves the problems existing in the prior art, and provides a casting me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D27/02B22D18/02
Inventor 陈亮亮李其荣
Owner ASIA PACIFIC LIGHT ALLOY NANTONG TECH