Preparation technology of discontinuously reinforced aluminum matrix composite (DRA) thin-wall tubing

A thin-walled pipe and preparation process technology, applied in the field of aluminum-based composite materials, can solve the problems of no reports and the like, and achieve the effect of low production cost

Active Publication Date: 2014-06-18
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

Benefits of technology

The technical effect of this invention relates to an improved method for producing high-quality aluminium alloys (AA) pipes that are less expensive than traditional methods like casting or extrusion processes.

Problems solved by technology

Technological Problem: The technical problem addressed in this patented text relates to developing new types of metallic composites called Displacement Reinforce Alloys or Thin Walls made from these alloys due to their excellent performance at extreme temperatures like those found inside buildings during winter months without losing too much weight compared to traditional steel structures.

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

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Claims

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Application Information

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Owner 中科复材(滨州)新材料有限公司
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