Friction Extrusion Method for Preparation of Al-Si Alloy Profiles

A technology of aluminum-silicon alloy and extrusion method, which is applied in the field of metal forming processing, can solve the problems of high equipment and mold requirements and difficult material forming, and achieve the effects of low equipment and mold requirements, elimination of casting defects, and good application prospects

Inactive Publication Date: 2011-12-07
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of plastic forming processing technology is that it is difficult to form materials and has high requirements for equipment and molds.

Method used

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  • Friction Extrusion Method for Preparation of Al-Si Alloy Profiles
  • Friction Extrusion Method for Preparation of Al-Si Alloy Profiles
  • Friction Extrusion Method for Preparation of Al-Si Alloy Profiles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Friction extrusion processing of Al-30% Si alloy:

[0019] A. Manufacture a friction extrusion head with Φ4 eccentric hole;

[0020] B. The friction extrusion head rubs against the surface of the Al-30% Si alloy billet, and the friction relative speed reaches 530 revolutions per minute. At the same time, an extrusion force of 5 MPa is applied to extrude a Φ4 profile from the eccentric hole of the friction extrusion head, wherein The average diameter of silicon phase particles reaches 1.3 microns.

Embodiment 2

[0022] Friction extrusion processing of Al-12% Si alloy:

[0023] A. Manufacture a friction extrusion head with Φ4 eccentric hole;

[0024] B. The friction extrusion head rubs against the surface of the Al-12% Si alloy billet, and the friction relative speed reaches 530 revolutions per minute. At the same time, an extrusion force of 5 MPa is applied to extrude a Φ4 profile from the eccentric hole of the friction extrusion head, wherein The average diameter of silicon phase particles reaches 1.0 micron.

Embodiment 3

[0026] Friction extrusion processing of Al-6%Si alloy:

[0027] A. Manufacture a friction extrusion head with Φ4 eccentric hole;

[0028] B. The friction extrusion head rubs against the surface of the Al-6% Si alloy billet, and the friction relative speed reaches 530 revolutions per minute. At the same time, an extrusion force of 5 MPa is applied to extrude a Φ4 profile from the eccentric hole of the friction extrusion head, wherein The average diameter of silicon phase particles reaches 0.9 microns.

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Abstract

The invention relates to a method for preparing aluminum-silicon alloy profiles, in particular to a friction extrusion method, which belongs to the technical field of metal forming processing. The method adopts the following steps to form: ① put the aluminum-silicon alloy billet into the aluminum-silicon alloy blank fixture with a concave cavity, and then install a friction extrusion head with an eccentric hole off the center line into the concave cavity; ②The friction extrusion head rotates and exerts pressure on the aluminum-silicon alloy billet at the same time, so that the aluminum-silicon alloy billet is heated and plasticized, and extruded from the eccentric hole of the friction extrusion head to become a profile; ③The aluminum-silicon alloy is controlled during friction extrusion The temperature of the billet does not exceed its eutectic temperature. The method can prepare aluminum-silicon alloy profiles with an average diameter of silicon phase particles less than or equal to 10 microns and no casting defects. In addition, the method also has the advantages of simple process, short process, low equipment requirements, etc., and has good application prospects.

Description

technical field [0001] The invention relates to a method for preparing aluminum-silicon alloy profiles, in particular to a friction extrusion method, which belongs to the technical field of metal forming processing. Background technique [0002] Aluminum-silicon alloy is the most important casting aluminum-based structural material, which has the advantages of high wear resistance and high temperature performance. However, there are usually acicular eutectic silicon phases and coarse plate-shaped primary silicon particles in the microstructure of cast aluminum-silicon alloys, which make the material's plasticity, toughness and fatigue strength low. At present, the technologies for refining and forming the silicon phase of cast aluminum-silicon alloy mainly include modification treatment (Q.C.Jiang, Materials Letters 59(2005): 624-628), rapid solidification (Li Yuanyuan, Trans.Nonferrous Met.Soc.China, Vol.12(5)(2000): 878-881), spray forming, etc. Modification treatment ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C23/00
Inventor 卢德宏李慧平蒋业华周荣
Owner KUNMING UNIV OF SCI & TECH
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