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Multi-layer Al-Si alloy and preparation method thereof

An al-si and alloy technology, which is applied in the field of material processing and can solve the problems of inability to prepare complex components and coarse Si phase size.

Inactive Publication Date: 2018-06-01
SHANGHAI UNIV OF ENG SCI
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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 meet the needs of different performances in different positions of the same component on the one hand, and to effectively solve the problems that the traditional casting process cannot prepare complex components and the size of the Si phase is large, and to propose a new preparation method for clad materials

Method used

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  • Multi-layer Al-Si alloy and preparation method thereof
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  • Multi-layer Al-Si alloy and preparation method thereof

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Embodiment 1

[0043] 1. Al-12Si, Al-20Si master alloy fusion

[0044] Step 1. Select industrial-grade pure alloys, specific components: industrial pure Al (99.9%), pure Si (99.9%). Put the weighed metal material into the magnesia crucible according to the composition ratio (mass percentage) and adopt induction melting.

[0045] Step 2. Heat the crucible, control the melting temperature at 800-850°C (Al-20Si) and 700-750°C (Al-12Si), respectively, use a thermocouple to test the temperature of the melt in real time, and use graphite during the melting process Stir with a stirring rod so that the alloy elements can be evenly distributed. After the alloy is completely melted, keep it warm for 30 minutes to ensure that Si is completely melted.

[0046] Step 3, the alloy liquid is poured into a metal mold after degassing and slag removal.

[0047] 2. Preparation process of aluminum-silicon alloy atomized powder of cladding material

[0048] Step 1. Put the melted ingot into the spray depositio...

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Abstract

The invention relates to a preparation method of a multi-layer Al-Si alloy and belongs to the technical field of material processing. In the invention, according to a formula, a master alloy ingot isprepared through fusion blending via a conventional casting method, then alloy powder is prepared via a gas atomization process; then the multi-layer material is prepared through a selective laser fusion technology; finally the mechanical performances of the multi-layer material are adjusted through subsequent thermal treatment, thereby preparing the multi-layer material having microstructure uniformity and high-performances. Being different from methods, with hot press sintering and casting, for preparing the multi-layer Al-Si alloy, the method, for the first time, employs the selective laserfusion technology to prepare the alloy, then employs thermal treatment for further adjusting the strength and ductility of the alloy. The method not only has practical value to development of high-performance light alloys, but also supplies a new way for laser rapid shaping and technical optimization of complex and fine structural members.

Description

technical field [0001] The invention relates to a preparation method of a multilayer Al-Si alloy, which belongs to the technical field of material processing. Background technique [0002] Al-Si alloy is widely used in aviation, aerospace, automobile and other fields because of its light weight, high thermal conductivity, low thermal expansion coefficient, high strength and excellent wear resistance and corrosion resistance. With the development of modern industry, the structure of Al-Si alloy components is gradually changing to complex shapes, which puts forward new requirements for its process flow and dimensional accuracy; and with the increase in the complexity of component structures, the performance required by each part not exactly. In addition, with the increase of silicon content, the strength, wear resistance and corrosion resistance of the alloy increase, but the ductility and thermal conductivity show the opposite trend and the alloy microstructure gradually coa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/04C22F1/043C22F1/02B22F9/08B22F3/105
CPCC22C1/0416C22C21/02C22F1/02C22F1/043B22F9/082B22F10/00B22F10/64B22F10/28B22F10/34B22F10/32Y02P10/25
Inventor 马盼贾延东于治水赵健史冬夏
Owner SHANGHAI UNIV OF ENG SCI
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