Laser additive and heat treatment composite process for high-strength and high-toughness aluminum-silicon alloy or composite material thereof

A composite material and laser additive technology, applied in the field of metal materials, can solve problems such as high aging temperature and unfavorable fine-grained structure, and achieve the effects of increased strength and hardness, good comprehensive mechanical properties, and simple preparation process
CN112536446AActive Publication Date: 2021-03-23INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Publication Date
2021-03-23

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Abstract

The invention discloses a laser additive and heat treatment composite process for a high-strength and high-toughness aluminum-silicon alloy or a composite material thereof, and belongs to the technical field of metal materials. The process comprises the following steps of: firstly, carrying out selective laser melting printing on an aluminum-silicon alloy and a composite material thereof under thematching of parameters of thin powder laying, low power, high speed and air cooling to obtain a supersaturated solid solution structure; and then carrying out low-temperature aging heat treatment onthe supersaturated solid solution to finally obtain a high-performance sample which retains a printing-state fine structure and contains a fine reinforced phase. The strength and plasticity of the aluminum-silicon alloy and the composite material thereof can be remarkably improved, AlSi10Mg is taken as an example, and the strength and plasticity after treatment by the preparation process are superior to those of a same-system printed piece which is industrially applied at present. The process has the advantages of capability of preparing complex porous structural parts, high material utilization rate, high production efficiency, short production process, simplicity, safety, no pollution and economy.
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Description

technical field

[0001] The invention relates to the technical field of metal materials, in particular to a laser additive and heat treatment composite process for preparing high-strength and tough aluminum-silicon alloys or composite materials thereof. Background technique

[0002] With the development of modern industry, there is an urgent demand for high-strength, high-plasticity, high-precision, and lightweight complex parts, and additive manufacturing technology has emerged, among which laser selective melting (SLM) is a high-precision rapid additive Manufacturing technology has broad application prospects. The direct forming of complex structural parts can not only reduce the time and cost required for manufacturing and assembly, but also reduce the disadvantages of weight increase and stress concentration caused by welding and other connection methods. A lot of research went into it.

[0003] At present, the aluminum alloys used for SLM preparation mainly include 606...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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