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

Multi-stage aging treatment method for aluminium-zinc-magnesium-copper 7000 series alloy thick plates

A technology of graded aging and treatment method, applied in the field of graded aging treatment of zinc, copper 7000 series alloy thick plate, aluminum, magnesium, can solve the problems of low fracture toughness, cracking sensitivity, etc., to improve fracture toughness, reduce sensitivity, improve The effect of mechanical properties

Inactive Publication Date: 2015-01-28
DALIAN HUICHENG ALUMINUM
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still deficiencies in that the quenched and tempered state is sensitive to stress corrosion cracking and low fracture toughness.

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
  • Multi-stage aging treatment method for aluminium-zinc-magnesium-copper 7000 series alloy thick plates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] Embodiment, with reference to accompanying drawing, a kind of aluminum, zinc, magnesium, copper 7000 series alloy thick plate graded aging treatment method, it is characterized in that taking the following steps:

[0014] a. Put aluminum, zinc, magnesium, copper 7000 series alloy thick plates in box type quenching furnace 1 for quenching treatment, the quenching temperature is raised to 477±3°C, and the holding time is 80~100min; quenching transfer time t1≤30~ 50s;

[0015] b. the aluminum, zinc, magnesium, copper 7000 series alloy thick plate after quenching treatment is cooled in the water cooling container 2;

[0016] c. Put the cooled aluminum, zinc, magnesium, and copper 7000 series alloy thick plates in the aging furnace 3 for three-stage aging treatment. The first-stage aging temperature is 120±3°C, and the holding time is 4~6h; the second-stage The aging temperature is 155±3℃, and the holding time is 24~28h; the third aging temperature is 120±3℃, and the holdin...

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

No PUM Login to View More

Abstract

The invention belongs to a multi-stage aging treatment method for aluminium-zinc-magnesium-copper 7000 series alloy thick plates. The multi-stage aging treatment method is characterized by comprising the following steps of (a) putting the aluminium-zinc-magnesium-copper 7000 series alloy plates in a box type quenching furnace (1) to carry out quenching treatment, wherein a quenching temperature is increased to 477+ / -3 DEG C and a retention time is 80-100 min; (b) cooling the quenched in a water cooler (2); (c) carrying out multi-stage aging treatment in an aging furnace (3), wherein a first stage aging temperature is 120+ / -3 DEG C, a second stage aging temperature is 155+ / -3 DEG C and a third stage aging temperature is 120+ / -3 DEG C; and (d) processing into samples, stretching the samples on an electronic universal testing machine (4), observing microstructures and detecting changes of crystal grains under an optical microscope (5), and determining conductivity on an conductivity meter (6). The aluminium-zinc-magnesium-copper 7000 series alloy thick plates treated by the method increase mechanical properties of aluminium alloy materials and obviously increase fracture toughness.

Description

technical field [0001] The invention belongs to a metal treatment method, in particular to a classification aging treatment method for aluminum, zinc, magnesium and copper 7000 series alloy thick plates. Background technique [0002] The 7000 series aluminum alloys of aluminum, zinc, magnesium and copper in the United States are the earliest and still widely used super-duralumin in the aviation industry. There were stereotyped products as early as the 1940s, and they were already in the United States in the early 1950s. Registered with the Aluminum Association. At that time, in order to obtain high-strength structural materials, the peak aging system was mainly used, but the materials in this quenched and tempered state were very sensitive to stress corrosion cracking, and the fracture toughness was also very low. Therefore, the improvement of the stress corrosion resistance (SCR) of 7000 series aluminum alloys has always been paid great attention. In order to solve the co...

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): C22F1/053
CPCC22F1/053C22F1/002
Inventor 杨晓光焦兴贵许晨玲
Owner DALIAN HUICHENG ALUMINUM
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