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A high-strength and tough aluminum profile for rail transit

A rail transit and aluminum profile technology, applied in the field of aluminum profiles, can solve the problems of limited rail transit applications, unsatisfactory toughness and corrosion resistance, poor product uniformity and stability, etc.

Active Publication Date: 2022-04-05
安徽鑫铂铝业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the strength, toughness and corrosion resistance of the existing aluminum alloy materials are still not ideal, resulting in poor product uniformity and stability, which limits its application in the field of rail transit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A high-strength and tough aluminum profile for rail transit proposed by the present invention, its chemical composition includes: Zn: 5%, Mg: 1.8%, Cu: 1.5%, Mn: 0.27%, Cr: 0.27%, Ti: 0.1 %, Zr: 0.24%, Bi: 0.3%, B: 0.02%, Gd: 0.11%, Sc: 0.12%, Ho: 0.33%, Y: 0.13%, V: 0.01%, and the balance is Al;

[0019] The preparation method of the high-strength and tough aluminum profile for rail transit includes: melting and casting raw materials, and then performing homogenization, rolling, solid solution, quenching and aging treatment;

[0020] Wherein, the cooling rate of the quenching is 10000×C Zr +15000×C Sc +15℃ / s, where, C Zr 、C Sc They are the mass percentages of Zr and Sc respectively; that is, 10000×0.24%+15000×0.12%+15°C / s=57°C / s;

[0021] The aging treatment is a four-stage aging treatment; the temperature of the first-stage aging treatment is 155° C., and the time is 22 hours; the temperature of the second-stage aging treatment is 200° C., and the time is 15 minut...

Embodiment 2

[0023] A high-strength and tough aluminum profile for rail transit proposed by the present invention, its chemical composition includes: Zn: 5.8%, Mg: 2.2%, Cu: 0.5%, Mn: 0.33%, Cr: 0.22%, Ti: 0.15% %, Zr: 0.18%, Bi: 1%, B: 0.01%, Gd: 0.21%, Sc: 0.18%, Ho: 0.37%, Y: 0.05%, V: 0.05%, and the balance is Al;

[0024] The preparation method of the high-strength and tough aluminum profile for rail transit includes: melting and casting raw materials, and then performing homogenization, rolling, solid solution, quenching and aging treatment;

[0025] Wherein, the cooling rate of the quenching is 10000×C Zr +15000×C Sc +15°C / s=10000×0.18%+15000×0.18%+15°C / s=60°C / s; among them, C Zr 、C Sc Respectively the mass percentage of Zr, Sc;

[0026] The aging treatment is a four-stage aging treatment; the temperature of the first-stage aging treatment is 180° C., and the time is 10 hours; the temperature of the second-stage aging treatment is 230° C., and the time is 5 minutes; the temperat...

Embodiment 3

[0033] A high-strength and tough aluminum profile for rail transit proposed by the present invention, its chemical composition includes: Zn: 5.5%, Mg: 1.9%, Cu: 1.2%, Mn: 0.28%, Cr: 0.26%, Ti: 0.12 %, Zr: 0.22%, Bi: 0.38%, B: 0.018%, Gd: 0.13%, Sc: 0.19%, Ho: 0.3%, Y: 0.07%, V: 0.04%, and the balance is Al;

[0034] The preparation method of the high-strength and tough aluminum profile for rail transit includes: melting and casting raw materials, and then performing homogenization, rolling, solid solution, quenching and aging treatment;

[0035] Wherein, the cooling rate of the quenching is 10000×C Zr +15000×C Sc +15°C / s=10000×0.22%+15000×0.19%+15°C / s=65.5°C / s; among them, C Zr 、C Sc Respectively the mass percentage of Zr, Sc;

[0036] The aging treatment is a four-stage aging treatment; the temperature of the first-stage aging treatment is 170° C., and the time is 13 hours; the temperature of the second-stage aging treatment is 210° C., and the time is 8 minutes; the temp...

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Abstract

The invention discloses a high-strength and tough aluminum section material for rail transit. Its chemical composition includes: Zn, Mg, Cu, Mn, Cr, Ti, Zr, Bi, B, Gd, Sc, Ho, Y, V, and the balance is Al; the preparation method of aluminum profiles includes: melting and casting raw materials, homogenizing, rolling, solid solution, quenching and aging treatment; the cooling rate of quenching is 10000×C Zr +15000×C Sc +15°C / s; C Zr 、C Sc are the mass percentages of Zr and Sc respectively; the aging treatment is a four-stage aging treatment; the temperature of the first-stage aging treatment is 155-180°C, and the time is 10-22h; the temperature of the second-stage aging treatment is 200-230°C, and the time is The temperature of the third-stage aging treatment is 90-120°C and the time is 5-15h; the temperature of the fourth-stage aging treatment is 160-170°C and the time is 3-5h.

Description

technical field [0001] The invention relates to the technical field of aluminum profiles, in particular to a high-strength and tough aluminum profile for rail transit. Background technique [0002] The urban rail transit system refers to a traffic system that uses vehicles running on fixed guide rails in cities and is mainly used for urban passenger transport. The lightweight of vehicle materials requires better corrosion resistance than general car body materials. Aluminum alloy materials have the advantages of low density, high strength, good corrosion resistance, good extrusion molding and welding performance, and easy surface processing and coating. It is widely used in the rail transit field. However, the strength, toughness and corrosion resistance of the existing aluminum alloy materials are still not ideal, resulting in poor product uniformity and stability, which limits its application in the field of rail transit. Contents of the invention [0003] Based on the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/10C22F1/053
CPCC22C21/10C22F1/053C22F1/002
Inventor 唐开健陈未荣王超李飞庆李亨
Owner 安徽鑫铂铝业股份有限公司
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