Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

5xxx aluminum alloy board for automobile body and manufacturing method thereof

A technology of aluminum alloy sheet and automobile body, which is applied in the field of alloy materials, can solve problems such as low elongation, easy cracking, and failure to meet the requirements of automobile body, and achieve the effect of preventing β phase from overburning and improving yield strength and elongation

Pending Publication Date: 2016-08-31
CHINALCO MATERIALS APPL RES INST CO LTD
View PDF4 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The elongation of the 5xxx series aluminum alloy sheets produced by the existing technology is low, which causes the inner panel parts of the automobile body to crack easily in the later stamping and forming, and Lüders bands are usually formed on the surface of the product during the deep drawing process, which seriously affects the surface of the product Quality, can not meet the requirements of the car body

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 5xxx aluminum alloy board for automobile body and manufacturing method thereof
  • 5xxx aluminum alloy board for automobile body and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036]Table 1 shows the examples of aluminum alloy plates that meet the requirements prepared by the alloy composition of the present invention, and the properties of the aluminum alloy plates produced by using alloys other than the alloy composition of the present invention. The process of preparing aluminum alloy plates using the alloy components in the examples and comparative examples is: melting, casting, face milling and homogenization of the ingot, wherein the homogenization process adopts two-stage homogenization, and first heats up at 50°C / h Heat to 420°C, keep it warm for 2 hours, then raise the temperature to 540°C at 30°C / h, keep it warm for 8 hours, take it out and cool it in air. Hot rolling, cold rolling, intermediate annealing, and final cold rolling are performed on the homogenized ingot, followed by continuous annealing at 465°C to obtain a finished plate. Finally, according to the requirements of GB / T228, the mechanical performance evaluation experiment of t...

Embodiment 2

[0044] For alloy C in Table 1, the plates were prepared according to the process sequence of smelting→casting→face milling→homogenization→hot rolling→cold rolling→intermediate annealing→cold rolling→final annealing. Table 2 shows the influence of the preparation process on the properties of the alloy. In the test results, if the yield strength is not between 110 and 150 MPa, the elongation rate is less than 24%, the yield strain value is greater than 0, and the grain size is less than 20 microns, underline the value.

[0045] As shown in Table 2, Table 2 is the preparation process and performance of the examples and comparative examples. In the examples, the preparation process of serial numbers 10-13 meets the scope of the present invention, and the yield strength, elongation, and yield strain of the obtained aluminum alloy plate The value satisfies the requirements of the present invention. In comparative example, serial number 14-16 is because of not satisfying the technic...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
yield strengthaaaaaaaaaa
particle sizeaaaaaaaaaa
elongationaaaaaaaaaa
Login to View More

Abstract

The invention provides a 5xxx aluminum alloy board for an automobile body and a manufacturing method thereof. The board comprises the following components: 4.4 to 5.0wt% of Mg, not greater than 0.1wt% of Si, not greater than 0.25wt% of Fe, not greater than 0.25wt% of Mn, not greater than 0.05wt% of Cr, not greater than 0.3wt% of Cu, and the balance Al and inevitable impurity elements. The manufacturing method comprises the following steps: melting and casting aluminum alloy into an ingot; performing double-stage homogenizing treatment, namely, heating at a speed of being not less than 50 DEG C per hour until the temperature is 400 to 440 DEG C, maintaining the temperature for more than 2 hours, then heating at the speed of being not greater than 30 DEG C per hour until the temperature is 500 to 540 DEG C, and maintaining the temperature for more than 5 hours; performing hot rolling, cold rolling, intermediate annealing and final cold rolling; performing final annealing at the temperature of 450 to 530 DEG C in a continuous annealing manner. According to the 5xxx aluminum alloy board for the automobile body and the manufacturing method thereof, the components of the alloy and the preparation process of the aluminum alloy board are controlled, so that the yield strength and elongation percentage of the aluminum board can be improved, and as a result, the grain size can be increased within a certain range, and the surface of the formed board is free of luders bands.

Description

technical field [0001] The invention relates to a 5xxx series aluminum alloy plate for automobile body and a manufacturing method thereof, belonging to the technical field of alloy materials. Background technique [0002] With the continuous increase of global car ownership, energy consumption, environmental pollution and safety issues have become three severe issues facing the global auto industry. In order to reduce vehicle energy consumption, improve fuel economy, and reduce environmental pollution under the premise of controlling costs and ensuring performance, thereby protecting the earth's environment and saving limited energy, automobile companies are actively promoting the lightweight of automobiles. Aluminum alloy has become an ideal material for automobile lightweight due to its excellent characteristics such as light weight, corrosion resistance, good processing and forming performance, and high recycling rate. [0003] The weight of the car body accounts for abo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08C22C21/06C22F1/047C22C1/03
CPCC22C1/026C22C1/03C22C21/06C22C21/08C22F1/047
Inventor 赵丕植冯莹娟张琪王苗苗王捷
Owner CHINALCO MATERIALS APPL RES INST CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com