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Process for strengthening temperature deformation of Er-containing aluminum-magnesium alloy sheet material

A technology of aluminum alloy sheet and aluminum-magnesium alloy, which is applied in the field of warm deformation strengthening process to achieve the effects of stable strength, low deformation resistance and good plasticity

Active Publication Date: 2012-07-04
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the temperature deformation strengthening process of Er-containing aluminum-magnesium alloy sheets in China.

Method used

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  • Process for strengthening temperature deformation of Er-containing aluminum-magnesium alloy sheet material
  • Process for strengthening temperature deformation of Er-containing aluminum-magnesium alloy sheet material
  • Process for strengthening temperature deformation of Er-containing aluminum-magnesium alloy sheet material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 1) For an Er-containing aluminum alloy plate with a mass percentage content of: Mg, 6.0%; Mn, 0.43%; Zr, 0.16%; Er, 0.31%; unavoidable impurities ≤ 0.5%, and the balance is Al with a thickness of 20 mm. Carry out heat preservation at 400°C / 2h, and hot-roll the aluminum plate to 8mm at 400°C.

[0015] 2) For the Er-containing aluminum-magnesium alloy plate obtained in step 1), conduct heat preservation at 250°C / 2h, deform to 4mm in a single pass at 250°C, the deformation amount is 50%, and the rolling speed is 0.17ms -1 , air cooled to room temperature. According to the tensile test method of metal materials at room temperature (GB228-2002), the tensile performance test is carried out, and the data are listed in Table 1. The intergranular corrosion test was carried out according to the intergranular corrosion standard (GBT7998-2005), and the intergranular corrosion depth and rating are also listed in Table 1.

Embodiment 2

[0017] 1) For the mass percentage content: Mg, 6.0%; Mn, 0.43%; Zr, 0.16%; Er, 0.31%; unavoidable impurities ≤ 0.5%, the balance is Al, the thickness is 20mm Er-containing aluminum alloy plate, Carry out heat preservation at 400°C / 2h, and hot-roll the aluminum plate to 8mm at 400°C.

[0018] 2) For the Er-containing aluminum-magnesium alloy plate obtained in step 1), conduct heat preservation at 300°C / 2h, deform to 4mm in a single pass at 300°C, the deformation amount is 50%, and the rolling speed is 0.17ms -1 , air cooled to room temperature. According to the tensile test method of metal materials at room temperature (GB228-2002), the tensile performance test is carried out, and the data are listed in Table 1. The intergranular corrosion test was carried out according to the intergranular corrosion standard (GBT7998-2005), and the intergranular corrosion depth and rating are also listed in Table 1.

Embodiment 3

[0020] 1) For the mass percentage content: Mg, 6.0%; Mn, 0.43%; Zr, 0.16%; Er, 0.31%; unavoidable impurities ≤ 0.5%, the balance is Al-containing Er-containing aluminum alloy plate with a thickness of 20mm , heat preservation at 400°C / 2h, and hot-roll the aluminum plate at 400°C to 8mm.

[0021] 2) For the Er-containing aluminum-magnesium alloy plate obtained in step 1), conduct heat preservation at 350°C / 2h, deform to 4mm in a single pass at 350°C, the deformation amount is 50%, and the rolling speed is 0.17ms -1 , air cooled to room temperature. According to the tensile test method of metal materials at room temperature (GB228-2002), the tensile performance test is carried out, and the data are listed in Table 1. The intergranular corrosion test was carried out according to the intergranular corrosion standard (GBT7998-2005), and the intergranular corrosion depth and rating are also listed in Table 1.

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Abstract

The invention relates to a process for strengthening the temperature deformation of an Er-containing aluminum-magnesium alloy sheet material, belonging to the technical field of non-ferrous metal. The process comprises the following steps of: carrying out heat insulation on the Er-containing aluminum-magnesium alloy sheet material at 400 DEG C for 2 hours, wherein the Er-containing aluminum-magnesium alloy sheet material contains 5.8-6.8% of Mg, 0.4-0.8% of Mn, 0.1-0.2% of Zr, 0.1-0.4% of Er, no more than 0.5% of inevitable impurities and the balance of Al; reserving the deformation quantity of 30-50% for a finished product sheet; hot rolling an aluminum sheet to a corresponding thickness at the temperature of 400 DEG C; carrying out heat insulation for 2 hours at the temperature of 250-350 DEG C, and carrying out single-pass deformation at the temperature for heat insulation, wherein the deformation quantity is 30-50%, and the rolling speed is 0.08-0.25 ms<-1>; and carrying out air cooling to room temperature. The process has the characteristics of high strain rate, large single-pass deformation quantity, low resistance to deformation and the like, and the Er-containing aluminum-magnesium alloy sheet material obtained through processing has the advantages of higher strength and excellent plasticity and corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metals, and in particular relates to a temperature deformation strengthening process of Er-containing aluminum-magnesium alloy plates. Background technique [0002] The literature survey results show that aluminum alloy, as a traditional lightweight structural material, is widely used in civil and military fields such as transportation, building materials, aviation, and aerospace because of its high specific strength, high toughness, and good corrosion resistance. It plays an irreplaceable important role in the national economy and national defense construction. Since Al-Mg based aluminum alloys cannot be strengthened by heat treatment, the strength of Al-Mg based alloys is mainly improved through solid solution strengthening and strain strengthening. Increasing the content of Mg in Al-Mg series aluminum alloy is a main way of solid solution strengthening, and the increase of Mg content in al...

Claims

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Application Information

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IPC IPC(8): C22C21/06C22F1/047
Inventor 聂祚仁武长阳黄晖王为高坤元文胜平
Owner BEIJING UNIV OF TECH
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