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High-pressure counter-pressure casting method of Al-5 percent Cu base alloy

A technology of al-5%cu and differential pressure casting machine, which is applied in the field of high-pressure differential pressure casting of Al-5%Cu-based alloys, which can solve the problems of low density, low tensile strength of Al-5%Cu-based alloys, and elongation. Low rate and other problems, to achieve the effect of improving density, improving tensile strength and elongation mechanical properties, and improving feeding ability

Inactive Publication Date: 2011-06-15
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of low tensile strength, low elongation and low density of the Al-5%Cu-based alloy obtained by the existing differential pressure casting method. The present invention provides an Al-5%Cu-based alloy Alloy High Pressure Differential Pressure Casting Method

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  • High-pressure counter-pressure casting method of Al-5 percent Cu base alloy

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specific Embodiment approach 1

[0016] Specific embodiment one: the high-pressure differential pressure casting method of Al-5% Cu-based alloy in this embodiment is realized through the following steps:

[0017] 1. Adjust the differential pressure casting machine: Increase the thickness of the tank walls of the upper and lower working tanks of the differential pressure casting machine to 12-16 mm respectively, adjust the low-pressure air valve of the air circuit control system to a high-pressure air valve, and adjust the lock The locking force of the tight ring makes the working pressure of the differential pressure casting machine reach 3.0MPa, forming a high-pressure differential pressure casting machine. The working tank and the lower working tank are sealed and isolated by an intercommunication valve;

[0018] 2. Preparation of Al-5% Cu-based alloy melt: a. Take the following raw materials by mass percentage: 67.25% to 83.35% of aluminum, 10% of aluminum-copper master alloy, 2% to 5% of aluminum-manganes...

specific Embodiment approach 2

[0021] Embodiment 2: This embodiment differs from Embodiment 1 in that in step 1, the thicknesses of the tank walls of the upper working tank and the lower working tank of the differential pressure casting machine are respectively increased to 14 mm. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0022] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the following raw materials are weighed by mass percentage in step a of step two: 70.25% to 78% aluminum, 10% aluminum-copper master alloy, 3% ~4.5% aluminum-manganese master alloy, 2.5%-4.5% aluminum-zirconium master alloy, 3.5%-7% aluminum-vanadium master alloy, 2.5%-4% aluminum-titanium-boron master alloy, 0.2% cadmium. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention relates to a high-pressure counter-pressure casting method of an Al-5 percent Cu base alloy, solving the problems of little tensile strength, low extensibility and low density of an Al-5 percent Cu base alloy obtained by the prior counter-pressure casting method. The casting method comprises the following steps: (1) adjusting a counter-pressure casting machine to form a high-pressure counter-pressure casting machine; (2) weighting and welding raw materials to obtain a melt; and (3) carrying out the high-pressure counter-pressure casting on the melt to obtain Al-5 percent Cu basealloy. The casting method combines a high-pressure solidification technology and a counter-pressure casting technology, and the obtained Al-5 percent Cu base alloy achieves the tensile strength of 519.5 MPa, the extensibility of 16.97 percent and high density. The invention can be favorably applied to the aerospace industry, the nuclear industry and the weapon industry.

Description

technical field [0001] The invention relates to a differential pressure casting method of Al-5% Cu base alloy. Background technique [0002] As a kind of aluminum alloy material, Al-Cu alloy has very high mechanical properties at room temperature and high temperature, especially a wide range of strength and elongation indicators, great performance potential, and obvious heat treatment strengthening. It is widely used in aviation, aerospace, Automobile, machinery and other industries. The Al-5% Cu-based alloy (ZL205A) in the Al-Cu system is a high-strength cast aluminum alloy developed by my country, and it is one of the cast aluminum alloys with high strength in the world's industrial production. It has gradually shown a wide range of application prospects in industry and weapon industry. [0003] In recent years, with the development of the aerospace industry, the demand for large, complex, thin-walled, precise, high-quality high-strength aluminum alloy castings has been i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D17/00C22C21/12
Inventor 王宏伟李敏邹鹑鸣曹磊魏尊杰
Owner HARBIN INST OF TECH
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