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Light-weight ultrathin-wall high-speed rail aluminum sectional material and preparing technology thereof

A preparation process and ultra-thin wall technology, applied in electrolytic coatings, surface reaction electrolytic coatings, coatings, etc., can solve the problems of insufficient fracture toughness, high stress corrosion sensitivity, etc., to improve alloy strength and fracture toughness, improve Fatigue resistance, the effect of increasing adhesion

Inactive Publication Date: 2019-11-15
ANHUI XIN FA ALUMINUM PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a lightweight ultra-thin-walled high-speed rail aluminum profile and its preparation process, which solves the problems of insufficient fracture toughness and stress Corrosion-sensitive problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A lightweight ultra-thin-walled high-speed iron aluminum profile, containing the following metals in mass percentage: Cu0.1%, Mn0.2%, Mg1%, Cr0.1%, Zn4%, Zr0.1%, Ti0.05%, Fe0 .1%, Si0.35%, V0.06%, Yb0.06%, Ce0.04%, Li0.08%, the balance of aluminum and unavoidable impurities.

[0031] A preparation process for a lightweight ultra-thin-wall high-iron aluminum profile, comprising the following steps:

[0032] 1) First take Cu, Mn, Mg, Cr, Zn, Zr, Ti, Fe, Si, V, Yb, Ce, Li, mix the rest of aluminum and unavoidable impurities and put them into the melting furnace for smelting and casting For processing, the melting temperature is 860°C, the casting temperature is 820°C, and the aluminum alloy ingots are collected for use;

[0033] 2) Take the aluminum alloy ingot reserved as a spare in step 1), implement homogenization heat treatment, keep it at a low temperature below 500°C and above 600°C for 1 hour, and then heat it to above 600°C at a speed of above 200°C / h Homogenizat...

Embodiment 2

[0042]A light-weight ultra-thin-wall high-iron aluminum profile, comprising the following metals in mass percentage: Cu0.15%, Mn0.3%, Mg0.15%, Cr0.2%, Zn0.5%, Zr0.15%, Ti0. 075%, Fe0.2%, Si0.4%, V0.08%, Yb0.08%, Ce0.06%, Li0.1%, the balance aluminum and unavoidable impurities.

[0043] A preparation process for a lightweight ultra-thin-wall high-iron aluminum profile, comprising the following steps:

[0044] 1) First take Cu, Mn, Mg, Cr, Zn, Zr, Ti, Fe, Si, V, Yb, Ce, Li, mix the rest of aluminum and unavoidable impurities and put them into the melting furnace for smelting and casting For processing, the melting temperature is 860°C, the casting temperature is 820°C, and the aluminum alloy ingots are collected for use;

[0045] 2) Take the aluminum alloy ingot reserved as a spare in step 1), perform homogenization heat treatment, keep it at a low temperature below 500°C and above 600°C for 2 hours, and then heat it to above 600°C at a speed of above 200°C / h Homogenization te...

Embodiment 3

[0054] A light-weight ultra-thin-wall high-iron aluminum profile, containing metals in the following mass percentages: Cu0.2%, Mn0.4%, Mg2%, Cr0.3%, Zn6.0%, Zr0.2%, Ti0.1% , Fe0.3%, Si0.5%, V0.1%, Yb0.1%, Ce0.08%, Li0.12%, the balance of aluminum and unavoidable impurities.

[0055] A preparation process for a lightweight ultra-thin-wall high-iron aluminum profile, comprising the following steps:

[0056] 1) First take Cu, Mn, Mg, Cr, Zn, Zr, Ti, Fe, Si, V, Yb, Ce, Li, mix the rest of aluminum and unavoidable impurities and put them into the melting furnace for smelting and casting For processing, the melting temperature is 860°C, the casting temperature is 820°C, and the aluminum alloy ingots are collected for use;

[0057] 2) Take the aluminum alloy ingot reserved as a spare in step 1), perform homogenization heat treatment, keep it at a low temperature below 500°C and above 600°C for 3 hours, and then heat it to above 600°C at a speed of above 200°C / h Homogenization tempe...

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Abstract

The invention discloses a light-weight ultrathin-wall high-speed rail aluminum sectional material and a preparing technology thereof and belongs to the field of aluminum sectional material preparing.The light-weight ultrathin-wall high-speed rail aluminum sectional material includes metal comprising, by mass percent, 0.1%-0.2% of Cu, 0.2%-0.4% of Mn, 1%-2% of Mg, 0.1%-0.3% of Cr, 4%-6% of Zn, 0.1%-0.2% of Zr, 0.05%-0.1% of Ti, 0.1%-0.3% of Fe, 0.35%-0.5% of Si, 0.06%-0.1% of V, 0.06%-0.1% of Yb, 0.04%-0.08% of Ce, 0.08%-0.12% of Li and the balance aluminum and inevitable impurities. By meansof the light-weight ultrathin-wall high-speed rail aluminum sectional material and the preparing technology thereof, the design direction for adjusting the main components of the sectional material isadopted as the breakthrough, the content of high-solid-solubility elements is increased, low-solid-solubility elements are reduced, residual crystal phases worsening the comprehensive performance areeliminated, the content of Si, Fe, Cu and Mn is reasonably controlled, grains are refined, grain distribution is improved, the fracture toughness resistance and stress corrosion sensitive resistanceof the high-speed rail aluminum sectional material are effectively improved, and strength and impact toughness are improved.

Description

technical field [0001] The invention relates to the technical field of aluminum profile preparation, in particular to a lightweight ultra-thin-walled high-speed iron aluminum profile and a preparation process thereof. Background technique [0002] High-strength, tough and corrosion-resistant aluminum alloys have the advantages of high strength, low weight, corrosion resistance, and good processing performance. The technical requirements for the structure, mechanical properties, and organizational properties of aluminum alloy structural parts are becoming increasingly stringent. [0003] At present, there are still problems of insufficient fracture toughness and high sensitivity to stress corrosion in the aluminum profiles for rail transit such as high-speed rail in the market. The aggregation of phases at the grain boundaries is easy to cause stress corrosion, etc. At the same time, the flow behavior of high-strength aluminum alloys during deformation is complex, the volume...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22C1/02C22F1/053C25D11/16
CPCC22C1/026C22C21/10C22F1/053C25D11/16
Inventor 赵欣泰唐开健李杰王超傅凡一贡玉楼
Owner ANHUI XIN FA ALUMINUM PROD
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