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A method for producing aluminum alloy automobile sheet by cold rolling

An aluminum alloy sheet material and aluminum alloy technology, applied in metal rolling, temperature control, etc., can solve problems such as aluminum alloy automotive sheet that has not been studied, and achieve high strength, improved tensile strength, and good stamping performance.

Active Publication Date: 2018-06-26
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, cold rolling technology has been applied to steel materials, but there is no research in the field of aluminum alloy automotive sheets, which is a blank area

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Material preparation: 5754: Si: 0.42; Fe: 0.413; Cu: 0.08; Mn: 0.53; Mg: 3.1; Put it into a liquid nitrogen refrigeration high and low temperature test box for cooling treatment;

[0017] Temperature control before rolling: put the aluminum alloy sheet cooled to room temperature after hot rolling into the high and low temperature test chamber refrigerated by liquid nitrogen, and use the low temperature gear control system of the high and low temperature test chamber for liquid nitrogen refrigeration to spray liquid nitrogen into the high and low temperature test chamber , carry out cooling treatment; set the target temperature value to -50°C, and hold the holding time for 20 minutes, so that the aluminum alloy plate is completely soaked at the set temperature;

[0018] Ultra-low temperature rolling: The aluminum alloy plate after low temperature treatment is subjected to multi-pass cold rolling on a cold rolling mill, and the reduction rate of each pass is above 10%. Af...

Embodiment 2

[0021] Material preparation: 6016: Si: 1.24; Fe: 0.43; Cu: 0.16; Mn: 0.18; Mg: 0.49; Cr: 0.08; Zn: 0.14; Ti: 0.11; mass percentage;

[0022] Low temperature treatment of materials: put the aluminum alloy plate cooled to room temperature after hot rolling into a liquid nitrogen refrigeration high and low temperature test box for cooling treatment;

[0023] Temperature control before rolling: put the aluminum alloy sheet cooled to room temperature after hot rolling into the high and low temperature test chamber refrigerated by liquid nitrogen, and use the low temperature gear control system of the high and low temperature test chamber for liquid nitrogen refrigeration to spray liquid nitrogen into the high and low temperature test chamber , carry out cooling treatment; set the target temperature at -50°C, and keep the holding time at 18 minutes, so that the aluminum alloy plate is completely soaked at the set temperature;

[0024] Ultra-low temperature rolling: The aluminum allo...

Embodiment 3

[0027] Material preparation: 6061: Si: 0.62; Fe: 0.46; Cu: 0.28; Mn: 0.15; Mg: 1.0; Zn: 0.246; Ti: 0.152; mass percentage;

[0028] Low temperature treatment of materials: put the aluminum alloy plate cooled to room temperature after hot rolling into a liquid nitrogen refrigeration high and low temperature test box for cooling treatment;

[0029] Temperature control before rolling: put the aluminum alloy sheet cooled to room temperature after hot rolling into the high and low temperature test chamber refrigerated by liquid nitrogen, and use the low temperature gear control system of the high and low temperature test chamber for liquid nitrogen refrigeration to spray liquid nitrogen into the high and low temperature test chamber , carry out cooling treatment; set the target temperature at -50°C, and hold the holding time for 22 minutes, so that the aluminum alloy plate is completely soaked at the set temperature;

[0030] Ultra-low temperature rolling: The aluminum alloy plate ...

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Abstract

The invention discloses a method for manufacturing an aluminum alloy automobile plate through subcooled rolling. The method comprises the steps that a hot-rolled plate made from 5-series aluminum alloy or 6-series aluminum alloy is selected as a raw material for subcooled rolling; the aluminum alloy plate which is hot-rolled and then cooled to the room temperature is put into a liquid nitrogen refrigerating high-low temperature test chamber to be cooled, wherein the set temperature target is minus 60-minus 40 DEG C, and the heat-preservation time is 15-25 min; and the aluminum alloy plate subjected to low-temperature treatment is subjected to multiple passes of subcooled rolling on a cold rolling mill with the reduction rate for each pass being 10% or over, the aluminum alloy plate is cooled continuously after each pass is completed to enable the temperature to be below -40 DEG C, and cold rolling is conducted repeatedly until the plate is of the target thickness. According to the method for manufacturing the aluminum alloy automobile plate through subcooled rolling, the recrystallized structure of the aluminum alloy plate is uniform, recrystallized grains are small in size, high in strength and good in stamping property, requirements for the strength and the stamping property of the automobile plate are met accordingly, and the automobile lightening progress is accelerated.

Description

[0001] The technical field [0002] The invention relates to a method for producing an aluminum alloy automobile plate by supercooling rolling. Background technique [0003] With the increasing shortage of energy issues and the deterioration of environmental issues, "energy saving, emission reduction, green environmental protection" has become the theme of the current era, which is in line with the national sustainable development strategy. In the automobile industry, automobile lightweight has been proposed. We can realize the lightweight of automobiles by replacing traditional steel materials with lightweight metal materials or optimizing the mechanism of automobiles. The focus of current research is to find lightweight alloys that can meet performance requirements instead of steel materials. Most cars start to use aluminum alloy materials instead of steel materials to reduce the weight of the car body, so that the fuel consumption of the cars will be greatly reduced, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/22B21B37/74C22C21/08C22C21/02C22F1/043C22F1/047
CPCB21B1/22B21B37/74B21B2001/221C22C21/02C22C21/08C22F1/043C22F1/047
Inventor 黄元春许天成
Owner CENT SOUTH UNIV
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