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

Forming method of Mg-Gd-Y-Zn-Zr magnesium alloy bidirectional expansion equal channel extrusion blank forming

An equal channel extrusion, magnesium alloy technology, applied in the direction of metal extrusion dies, etc., can solve the problems of difficult to achieve ultra-fine material, small strain, etc., achieve small deformation force, improve material performance, and enhance uniformity. Effect

Active Publication Date: 2019-04-12
ZHONGBEI UNIV
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Plastic deformation is a common method for alloys to improve material properties. Traditional plastic deformation billet making methods, such as pier rough drawing and long billet making method, are simple, convenient and easy to operate, but have the disadvantage of small strain, and it is difficult to achieve ultra-fine materials; large Plastic deformation (Severe Plastic Deformation, SPD) achieves microstructure grain refinement by introducing a large amount of strain, breaking up large massive LPSO phases, making the microstructure composition more dense and uniform, and achieving a two-way improvement in material strength and plasticity

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
  • Forming method of Mg-Gd-Y-Zn-Zr magnesium alloy bidirectional expansion equal channel extrusion blank forming
  • Forming method of Mg-Gd-Y-Zn-Zr magnesium alloy bidirectional expansion equal channel extrusion blank forming
  • Forming method of Mg-Gd-Y-Zn-Zr magnesium alloy bidirectional expansion equal channel extrusion blank forming

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] The invention discloses a method for forming a billet by bidirectional expansion equal-channel extrusion of a Mg-Gd-Y-Zn-Zr magnesium alloy, which involves a bidirectional expansion equal-channel extrusion of a Mg-Gd-Y-Zn-Zr magnesium alloy Forming dies for compacts, see Figure 1-15 , the mold includes an upper mold base 1, a punch 2 and a die 5.

[0038] Such as Figure 6 As shown, the punch 2 is a cylinder, and the upper end of the punch 2 forms a radially extending fixing portion 21, and the fixing portion 21 is square, such as Figure 11 As shown, the upper mold base 1 is provided with a square groove 11 for the insertion of the fixed part 21. After the insertion is completed, the lower end of the upper mold base 1 is provided with a fastening nut 3, and an external thread that cooperates with the fastening nut 3 is formed. The nut 3 passes through the punch 2 to clamp the fixing part 21, so that the punch 2 is coaxially and vertically fixed on the upper die base...

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
densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a forming method of Mg-Gd-Y-Zn-Zr magnesium alloy bidirectional expansion equal channel extrusion blank forming and relates to a forming die of the Mg-Gd-Y-Zn-Zr magnesium alloy bidirectional expansion equal channel extrusion blank forming. The die comprises an upper die seat, a male die and a female die, wherein the female die is arranged below the male die, is of an inverted "T" shape and is formed by communicating a vertical cavity and a horizontal cavity with the same diameter; in addition, a spherical cabin is formed in the intersection part of the vertical cavityand the horizontal cavity, small circular beads are respectively arranged in the joint of the spherical cabin and the vertical cavity and the joint of the spherical cabin and the horizontal cavity, and the vertical cavity is used for accessing the male die. A bidirectional equal channel extrusion structure formed by the vertical cavity and the horizontal cavity is adopted, the spherical cabin is arranged in the channel joint and a multi-pass deformation test is carried out, the compound superposition of the shear deformation in a cavity corner and the heading extrusion deformation in the spherical cabin during a material extrusion process is realized, accumulated plastic deformation process of a material is reached, refinement of a microstructure of a Mg-Gd-Y-Zn-Zr magnesium alloy blank isfinally realized, and the mechanical property of an alloy is promoted.

Description

technical field [0001] The invention belongs to the technical field of plastic processing and forming of metal materials, and in particular relates to a forming method of Mg-Gd-Y-Zn-Zr magnesium alloy bidirectional expansion equal channel extrusion billet making. Background technique [0002] With the continuous consumption of natural energy and the situation of near-exhaustion, the development of lightweight equipment has become an inevitable guide. As the lightest metal, magnesium has a density of 1.74g / cm3, which is only two-thirds of that of aluminum. A quarter of titanium, a third of titanium. At the same time, magnesium alloy has high specific strength, specific stiffness, corrosion resistance and electromagnetic shielding properties, making it an important choice for aerospace and electronic materials. In the Mg-Gd-Y-Zn-Zr alloy, because of the existence of the LPSO (Long Period Stacking Ordered) structure, the alloy has higher performance than the traditional magnes...

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): B21C23/00B21C25/02
CPCB21C23/001B21C25/02
Inventor 张治民闫钊鸣王强朱家萱张冠世任璐英
Owner ZHONGBEI UNIV
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