A laser additive and heat treatment composite process for preparing high-strength and tough aluminum-silicon alloys or their composite materials

A composite material and laser additive technology, which is applied in the field of metal materials, can solve the problems of unfavorable fine-grained structure and high aging temperature, and achieve good comprehensive mechanical properties, increased strength and hardness, and increased production efficiency.
CN112536446BActive Publication Date: 2022-03-08INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Publication Date
2022-03-08

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Abstract

The invention discloses a high-strength and tough aluminum-silicon alloy or its composite material laser additive and heat treatment composite process, which belongs to the technical field of metal materials. In this process, the aluminum-silicon alloy and its composite materials are selected by laser melting and printing under the parameters of thin powder spreading, low power, high speed, and external air cooling to obtain the supersaturated solid solution structure; then the supersaturated solid solution is processed. The low-temperature aging heat treatment finally obtains a high-performance sample that retains the fine structure of the printed state and contains a fine reinforcing phase. The present invention can significantly improve the strength and plasticity of aluminum-silicon alloys and their composite materials. Taking AlSi10Mg as an example, the strength and plasticity of this preparation process are better than those of the same system printing parts currently used in industry. The methods involved The invention has the advantages of being able to prepare structural parts with complex porous shapes, high material utilization rate, high production efficiency, short production process, simple, safe, pollution-free and economical.
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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] The aluminum alloys currently used for SLM preparation mainly include 6061,...

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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