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Preparation method of Al-5 percent Cu base alloy with low heat cracking tendency

An al-5%cu-based alloy technology, applied in the field of Al-5%Cu-based alloy preparation, can solve the problems of high hot cracking tendency and wide crystallization temperature range of Al-5%Cu-based alloys, and achieve hot cracking The effect of increased resistance, narrowed crystallization temperature range, and improved hot cracking tendency

Inactive Publication Date: 2011-04-06
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 wide crystallization temperature range and high thermal cracking tendency of the Al-5%Cu-based alloy obtained by the existing method. The present invention provides a low thermal cracking tendency Al-5%Cu-based alloy prepared method

Method used

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  • Preparation method of Al-5 percent Cu base alloy with low heat cracking tendency
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  • Preparation method of Al-5 percent Cu base alloy with low heat cracking tendency

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specific Embodiment approach 1

[0012] Specific implementation method 1: The preparation method of Al-5% Cu-based alloy with low thermal cracking tendency in this embodiment is realized through the following steps: 1. Weigh the following raw materials according to mass percentage: 66.15% to 82.45% aluminum, 10% aluminum Copper master alloy, 2%-5% aluminum-manganese master alloy, 1.25%-5% aluminum-zirconium master alloy, 1.25%-7.5% aluminum-vanadium master alloy, 2%-5% aluminum-titanium-boron master alloy, 0.15 % to 0.25% cadmium and 0.9% to 1.1% aluminum yttrium master alloy; 2. Clean the surface of the raw materials in step 1, then dry them naturally and mix them into a graphite crucible, then place the graphite crucible at 700 to 750 Heating at ℃ until the raw material is completely melted, then injecting argon gas for 20-40 minutes, then pouring the melt into a metal ingot mold to obtain an Al-5%Cu-based alloy chilled ingot; 3. Weighing by mass percentage 15%~25% Al-5%Cu-based alloy chilled ingot obtained...

specific Embodiment approach 2

[0015] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, the following raw materials are weighed according to mass percentage: 70% to 75% of aluminum, 10% of aluminum-copper master alloy, 2.5% to 4% of aluminum Manganese master alloy, 3%~4.5% aluminum zirconium master alloy, 5%~7% aluminum vanadium master alloy, 2.5%~4% aluminum titanium boron master alloy, 0.2% cadmium and 1% aluminum yttrium master alloy. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0016] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in Step 2, a sodium hydroxide solution with a mass concentration of 10% is used to clean the raw materials in Step 1. 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 preparation method of an Al-5 percent Cu base alloy, in particular to a preparation method of an Al-5 percent Cu base alloy with low heat cracking tendency, solving the problems of wide crystallization temperature range and high heat cracking tendency of an Al-5 percent Cu base alloy prepared by the prior method. The preparation method comprises the following steps: (1)weighting the following raw materials: aluminum, an aluminum-copper master alloy, an aluminum-manganese master alloy, an aluminum-zirconium master alloy, an aluminum-vanadium master alloy, an aluminum-titanium-boron master alloy, cadmium and an aluminum-yttrium master alloy; (2) cleaning the surfaces of the raw materials and melting and casting the raw materials to obtain a chilled ingot; and (3)mixing, melting and casting the chilled ingot and the raw materials in the step (1) to obtain the Al-5 percent Cu base alloy. The Al-5 percent Cu base alloy achieves the tensile strength of 450-500N and the heat cracking resistance value of 670N which is higher than the heat cracking resistance value of the prior Al-5 percent Cu base alloy by 103 percent, thereby being more safely applied to the aerospace industry, the weapon industry and the nuclear industry.

Description

technical field [0001] The invention relates to a method for preparing an Al-5% Cu-based 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 (ZL205 alloy) in the Al-Cu system is a high-strength cast aluminum alloy developed by my country. It is one of the cast aluminum alloys with high strength in the world's industrial production. In the nuclear industry and the weapon industry, it gradually shows a wide range of application prospects. [0003] In recent years, with the development of the aerospace industry, the requirements for high-strength and tough cast aluminum alloys have become higher and higher, which requires tha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/03C22C21/12
Inventor 李敏王宏伟魏尊杰
Owner HARBIN INST OF TECH
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