Hot top casting process for phi 784-mm 7xxx-series superhard aluminum alloy round bar

A technology of hard aluminum alloy and hot top casting, which is applied in the field of metal material forming, can solve the problems such as loose pores of bright grains, and achieve the effect of reducing the internal stress of casting

Active Publication Date: 2016-07-06
CHINA ZHONGWANG
View PDF4 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the object of the present invention is to provide a hot-top casting process for 7xxx series superhard aluminum alloy round rods with a diameter of 784 mm. cracks, composition segregation, bright crystal grains,

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
  • Hot top casting process for phi 784-mm 7xxx-series superhard aluminum alloy round bar
  • Hot top casting process for phi 784-mm 7xxx-series superhard aluminum alloy round bar

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0038] Example 1

[0039] The hot-top casting process of the 7xxx series super-hard aluminum alloy round bar, the aluminum alloy round bar contains the following chemical components by mass: Si 0.25%; Fe 0.4%; Cu 1.6%; Mn 0.25%; Mg2.6%; Cr0.2%; Zn5.6%; Ti0.15%; Zr0.03%; Al balance.

[0040] The preparation process includes the following steps:

[0041] a. Material preparation: select low-iron and low-silicon aluminum ingots, aluminum-manganese alloys, aluminum-copper master alloy ingots, aluminum-lead master alloy ingots and magnesium ingots according to the ratio;

[0042] b. Smelting: Add other raw materials except magnesium ingots to the furnace for smelting, the melting temperature is 760℃, and the magnesium ingots are added after the slagging is completely melted and refined;

[0043] c. Stirring: The electromagnetic stirrer is used to stir to ensure that the raw materials in the furnace can be quickly melted and the temperature is uniform;

[0044] d. Refining: the refining proce...

Example Embodiment

[0056] Example 2

[0057] The hot-top casting process of the 7xxx series super-hard aluminum alloy round bar, the aluminum alloy round bar contains the following chemical components by mass: Si0.25%; Fe0.4%; Cu1.55%; Mn0.25%; Mg2.55%; Cr0.19%; Zn5.6%; Ti0.15%; Zr0.03%; Al balance.

[0058] The preparation process includes the following steps:

[0059] a. Material preparation: select low-iron and low-silicon aluminum ingots, aluminum-manganese alloys, aluminum-copper master alloy ingots, aluminum-lead master alloy ingots and magnesium ingots according to the ratio;

[0060] b. Smelting: Add other raw materials except magnesium ingots into the furnace for smelting, the melting temperature is 755℃, and the magnesium ingots are added after the refining slag is completely melted;

[0061] c. Stirring: The electromagnetic stirrer is used to stir to ensure that the raw materials in the furnace can be quickly melted and the temperature is uniform;

[0062] d. Refining: the refining process inc...

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 discloses a hot top casting process for a phi 784-mm 7xxx-series superhard aluminum alloy round bar. The aluminum alloy round bar is composed of, by mass, 0.25% of Si, 0.4% of Fe, 1.55-1.65% of Cu, 0.25% of Mn, 2.55-2.65% of Mg, 0.19-0.25% of Cr, 5.6-5.7% of Zn, 0.15% of Ti, 0.03% of Zr and the balance Al. The manufacturing process comprises the steps of a, material preparation; b, smelting; c, stirring; d, refining; e, slagging-off; f, heat preservation and standing; g, online thinning; h, online degassing; i, filtration; j, casting; k, homogenizing. Through the process, the defects, such as cracks, component segregation, bright grains, thick grains and loose pores, which often appear when a direct condensation casting technology is adopted for large-diameter superhard aluminum alloy are overcome, and by the adoption of hot top casting, the defects of surface segregation tumors, thick coarse-grain layers and the like are overcome.

Description

technical field [0001] The invention belongs to the field of metal material forming, and relates to an aluminum alloy casting method, in particular to a hot-top casting process for a 7xxx series superhard aluminum alloy round bar with a diameter of 784 mm. Background technique [0002] 7xxx series aluminum alloys have the advantages of high specific strength and hardness, good thermal processing performance, excellent welding performance, good corrosion resistance and high toughness, etc., and should be made into structural materials with greater bearing capacity and widely used In the aerospace industry and other civil industrial fields. [0003] Although the strength of 7xxx series aluminum alloys is superior to that of 6XXX series aluminum alloys, the tensile strength and yield strength of some alloys can reach more than 400MPa, but the tensile strength and yield strength of 7xxx series aluminum alloys both reach 400MPa or more, after anodic oxidation, the surface The qu...

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
IPC IPC(8): C22C21/10C22C1/03C22C1/06B22D11/00C22F1/053
CPCB22D11/003C22C1/026C22C1/03C22C1/06C22C21/10C22F1/053
Inventor 马青梅盖洪涛李菁菁叶尚英李伟
Owner CHINA ZHONGWANG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap