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A method of solidifying under pressure to prepare al-cu alloy with high cu content

An al-cu and alloy technology, which is applied in the field of preparation of Al-Cu alloy with high Cu content, to achieve the effects of improving microstructure uniformity and mechanical properties, expanding the application range, and reducing the tendency of hot cracking

Active Publication Date: 2021-06-18
SHANGHAI UNIV OF ENG SCI
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Problems solved by technology

Although there is also a "high pressure treatment process", only small-sized samples can be prepared

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  • A method of solidifying under pressure to prepare al-cu alloy with high cu content
  • A method of solidifying under pressure to prepare al-cu alloy with high cu content
  • A method of solidifying under pressure to prepare al-cu alloy with high cu content

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[0034] The following part is a specific implementation to further explain the present invention, but the following implementation is only a further explanation of the present invention, and does not mean that the protection scope of the present invention is limited to this, and all equivalent replacements based on the ideas of the present invention are included in this document. protection scope of the invention.

[0035] Take the Al-Cu alloy of high copper content as an example to further describe the present invention:

[0036] 1. The preparation process of Al-Cu master alloy with high Cu content, step A mainly includes the following steps:

[0037] The raw materials of A1 fusion alloy are high-purity aluminum (99.9% Al) and high-purity copper (99.9% Cu). Put the weighed metal material into the quartz crucible according to the mass ratio and adopt induction melting.

[0038] The A2 alloy is melted in an intermediate frequency vacuum induction furnace. The melting temperatur...

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Abstract

The invention belongs to the technical field of material processing, in particular to a method for preparing an Al-Cu alloy with high Cu content. The method provided by the invention comprises the steps of (1) Al-Cu master alloy fusion; (2) preparation of ultra-high pressure solidified Al-Cu alloy. The invention adopts the pressure solidification technology to reduce the thermal cracking tendency of the alloy, reduce segregation, and obtain a casting with compact structure, uniform structure and excellent performance. The present invention selects a pressure solidification method, which reduces the hot cracking tendency of the alloy by generating forced feeding during the solidification process, eliminates casting defects such as shrinkage cavities and shrinkage porosity, and prepares Al-Cu alloys with high Cu content. In addition, applying ultra-high pressure during the solidification process can significantly refine the alloy structure, especially reduce the Al 2 Cu size. The refinement of the structure is conducive to improving the mechanical properties of the alloy at room temperature, making it more widely used in the fields of automobiles, aviation and aerospace.

Description

technical field [0001] The invention relates to a method for preparing an Al-Cu alloy with high Cu content, belonging to the technical field of material processing. Background technique [0002] As a high-strength aluminum alloy, Al-Cu has excellent mechanical properties and machinability, and has important applications in aviation, aerospace, national defense equipment, automobiles and other fields. [0003] Currently, Al-Cu alloys are mainly prepared by casting methods. However, the crystallization temperature range of the alloy is wide, the casting performance is poor, and casting defects such as shrinkage cavity, shrinkage porosity and thermal cracking are easily formed. When this type of alloy is solidified, the distribution coefficient K<1, the low-melting point copper-rich liquid phase is squeezed into the dendrite gap, showing more serious dendrite segregation; in addition, when casting Al-Cu alloy complex thick-walled parts, it is easy to produce Macrosegregati...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/03C22C21/12
CPCC22C1/03C22C21/12
Inventor 马盼张世凯赵健于治水杨尚磊
Owner SHANGHAI UNIV OF ENG SCI
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