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Preparation process of a discontinuously reinforced aluminum matrix composite thin-walled pipe

A composite material and reinforced aluminum-based technology, which is applied in the field of aluminum-based composite materials, can solve problems such as no reports, and achieve the effect of low production costs

Active Publication Date: 2016-01-06
中科复材(滨州)新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And for the preparation method of DRA thin-walled tubing less than 100mm in diameter, there is no report at present

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The 15vol.% SiCp / 6061Al billet was prepared by powder metallurgy method, and the tube billet was prepared by hot extrusion method. The size of the prepared tube blank is The prepared DRA tube blank is annealed, and the DRA is in the softened state with the best plasticity after the annealing treatment. Three-roll mill cold rolling, 10% diameter reduction and 15% wall reduction per pass, rolling speed 80 times / min, feed speed 8mm / time, rolling 6 passes, annealing between each pass The annealing temperature 500 DEG C of its annealing temperature before cold rolling and between every two passes, annealing time 2 hours. The prepared pipe was solution treated at 530°C for 1 hour, and aged at 160°C for 24 hours. The final rolled tube size is The outer diameter tolerance of the pipe is ≤0.05mm, the roundness is ≤0.02mm, and the wall thickness deviation is ≤0.05mm.

Embodiment 2

[0021] The 15vol.% SiCp / 6061Al billet was prepared by powder metallurgy method, and the tube billet was prepared by hot extrusion method. The size of the prepared tube blank is The prepared DRA tube blank is annealed, and the DRA is in the softened state with the best plasticity after the annealing treatment. Three-roll mill cold rolling, 10% diameter reduction and 15% wall reduction per pass, rolling speed 80 times / min, feed speed 8mm / time, rolling 6 passes, annealing between each pass The annealing temperature 500 ℃ of its annealing temperature before cold rolling and between each pass, 2 hours of annealing time. The prepared pipe was solution treated at 530°C for 1 hour, and aged at 160°C for 24 hours. The final rolled tube size is The tensile strength of the pipe is 420MPa, the yield strength is 340MPa, and the elongation is 10%.

Embodiment 3

[0025] Prepare 20vol.%B by powder metallurgy method 4 Cp / 5083Al billet, the pipe billet is prepared by hot extrusion method. The size of the prepared tube blank is The prepared DRA tube blank is annealed, and the DRA is in the softened state with the best plasticity after the annealing treatment. Three-roll mill cold rolling, 10% diameter reduction and 10% wall reduction per pass, rolling speed 90 times / min, feed speed 5mm / time, rolling 13 times, annealing between each pass 450°C of annealing temperature and 10 hours of annealing time before cold rolling and between each pass. The final rolled tube size is The tensile strength of the pipe is 510MPa, the yield strength is 400MPa, and the elongation is 8%.

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Abstract

The invention discloses a preparation technology of a discontinuously reinforced aluminum matrix composite (DRA) thin-wall tube, and belongs to the technical field of the preparation of aluminum matrix composites; according to the technology, a powder metallurgy or stir casting method is used for preparing a DRA billet, and a hot extrusion method is used for preparing a DRA tube blank, and after annealing treatment, the tube blank is put on a bi-roller or multi-roller rolling mill for cold rolling, and the annealing treatment is performed between every two times of cold rolling until the tube is rolled to a required size. After cold rolling, by solid solution treatment and aging treatment of DRA capable of being reinforced by heat treatment, a seamless tube with good performances can be obtained.

Description

technical field [0001] The invention relates to the field of aluminum-based composite materials, in particular to a preparation process for discontinuously reinforced thin-walled pipes of aluminum-based composite materials. Background technique [0002] Metal Matrix Composite (MMC) not only has the characteristics of light weight and high strength, but also has a series of advantages such as good fatigue resistance, high temperature creep resistance, heat resistance, wear resistance, vibration reduction and dimensional stability, and has become a national economic development and national defense. An important structural material in the security field. Due to its light weight, high strength and simple manufacturing process, discontinuously reinforced aluminum matrix composite (DRA) has become the most widely used MMC with the lowest preparation cost. The United States, Japan and other countries have successfully used DRA in the mass production of aircraft fuselage covers, b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/04
Inventor 王东王全兆肖伯律倪丁瑞马宗义
Owner 中科复材(滨州)新材料有限公司
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