Supercharge Your Innovation With Domain-Expert AI Agents!

High-silicon aluminum alloy material with high density and controllable components and preparation method

A high-silicon aluminum alloy and dense technology, applied in the field of alloy processing, can solve the problems of reducing strength, plasticity and wear resistance, deteriorating cutting performance, and a large number of holes in the alloy, so as to improve the strength and elastic modulus, and improve the final Density, the effect of high material density

Active Publication Date: 2022-04-08
HARBIN INST OF TECH +1
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Several commonly used processes for preparing high-silicon aluminum alloy materials have the following problems: (1) The preparation of high-silicon aluminum alloy materials by smelting and casting will cause coarse plate-like primary silicon and needle-like eutectics in the structure Silicon, severely split the matrix, and stress concentration will occur at the tip, which reduces the strength, plasticity and wear resistance, and deteriorates the cutting performance; (2) the silicon phase in the material structure prepared by the spray deposition method is refined, but the alloy A large number of holes appear in the Si preform, and the density is low; (3) Although the pressure infiltration method can improve the density of the material, it is difficult to prepare the Si preform, and cracks are prone to appear under high pressure.
However, in the traditional single-solid-phase hot-pressing sintering process, the high-content Si phase hinders the diffusion of the AlMgSi10 matrix material, making it difficult to form a metallurgical bond; in the single-liquid-phase sintering process, the low-melting point liquid phase is easy to extrude during the pressurization process, making it difficult to accurately control the composition.

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-silicon aluminum alloy material with high density and controllable components and preparation method
  • High-silicon aluminum alloy material with high density and controllable components and preparation method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0023] A method for preparing a high-density, composition-controllable high-silicon aluminum alloy material, comprising the following steps: including the following steps: AlMgSi 10 AlMgSi was prepared by mixing alloy powder and silicon powder by multi-stage hot pressing and sintering. X Alloys where X is greater than 10.

[0024] In some embodiments of the present invention, a method for preparing a high-density, composition-controllable high-silicon aluminum alloy material includes the following steps:

[0025] AlMgSi 10 Alloy powder and silicon powder are mixed in proportion to obtain mixed powder;

[0026] The mixed powder is subjected to multi-stage hot-press sintering: the parameters of the multi-stage hot-press sintering are: first stage: sintering at 350°C and 0MPa for 30min; second stage: sintering at 580°C and 25MPa for 30min; The third stage: sintering at 10°C above the liquidus temperature and 0 MPa for no more than 30 minutes; the fourth stage: sintering at 580...

Embodiment 1

[0039] AlMgSi10 alloy powder is used as the matrix, Si powder is added, the mixed powder is mixed evenly by planetary ball milling, the mass fraction of Si in the design alloy is 20wt.%, and a multi-stage hot-press sintering process is adopted; the parameters of the multi-stage hot-press sintering are: The first stage: sintering at 350°C and 0MPa for 30min; the second stage: sintering at 580°C and 25MPa for 30min; the third stage: sintering at 10°C higher than the liquidus temperature and 0MPa for no more than 30min; the fourth stage : Sintered at 580°C and 25MPa for 30min. AlMgSi20 alloy was obtained, the density of the alloy was as high as 99.86%, the compressive strength was 270.9MPa, the elastic modulus was 88.33GPa, and the thermal expansion coefficient was 17.2×10 -6 K -1 , The thermal conductivity is 186.4W / (m×K).

[0040] figure 2 It is the scanning diagram corresponding to Example 1. It can be seen from the figure that the primary silicon grains are fine, with a ...

Embodiment 2

[0042] combined with figure 1 , using AlMgSi10 alloy powder as the matrix, plus Si powder, the mixed powder is mixed evenly by planetary ball milling, the mass fraction of Si in the design alloy is 30wt.%, using multi-stage hot pressing sintering process (process parameters such as figure 1 shown); obtain AlMgSi30 alloy, the density of alloy is 98.06%, the compressive strength is 227.8MPa, the elastic modulus is 95.83GPa, and thermal expansion coefficient is 14.9×10 -6 K -1 , The thermal conductivity is 152.3W / (m×K).

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
Login to View More

PUM

PropertyMeasurementUnit
Elastic modulusaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of alloy processing, and discloses a high-silicon aluminum alloy material with high compactness and controllable components and a preparation method. The preparation method comprises the following steps that after AlMgSi10 alloy powder and silicon powder are mixed, the AlMgSiX alloy is prepared through multi-section hot pressing sintering, and X is larger than 10. The high-silicon aluminum alloy material disclosed by the invention has relatively high strength, elasticity modulus and compactness.

Description

technical field [0001] The invention relates to the technical field of alloy processing, in particular to a high-density, high-silicon aluminum alloy material with controllable composition and a preparation method. Background technique [0002] High-silicon aluminum alloy materials have many outstanding advantages such as low thermal expansion coefficient, good thermal conductivity, high hardness, high specific strength, good wear resistance, and small specific gravity. They are widely used in automobiles, electronics, aviation, aerospace and other fields, especially in Electronic packaging materials and automotive engine piston materials have a wide range of application potential. Several commonly used processes for preparing high-silicon aluminum alloy materials have the following problems: (1) The preparation of high-silicon aluminum alloy materials by smelting and casting will cause coarse plate-like primary silicon and needle-like eutectics in the structure Silicon, se...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C22C1/04C22C21/02B22F3/14C22C28/00
Inventor 黄陆军张财伟安琦陈润王存玉胡昌宇王帅耿林张宏伟
Owner HARBIN INST OF TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com