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

A device and method for preparing high-performance magnesium alloys with large plastic deformation

A large plastic deformation, magnesium alloy technology, applied in forging/pressing/hammer devices, manufacturing tools, metal extrusion dies, etc., can solve the problems of large free forging allowance, magnesium alloy folding, cracks, etc., and achieve machining allowance Less, less tensile stress, the effect of eliminating internal defects

Active Publication Date: 2021-06-04
HUNAN UNIV OF SCI & TECH
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the free forging allowance is large, and the upsetting deformation has a certain limit upsetting ratio. Attention should be paid to controlling the amount of reduction during each forging. The severe deformation is easy to cause defects such as folding and cracks in the magnesium alloy.

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
  • A device and method for preparing high-performance magnesium alloys with large plastic deformation
  • A device and method for preparing high-performance magnesium alloys with large plastic deformation
  • A device and method for preparing high-performance magnesium alloys with large plastic deformation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A method for preparing a high-performance magnesium alloy with large plastic deformation, comprising the steps of:

[0054] Step 1. Select a die with a die-extrusion ratio of 2, select the corresponding magnesium alloy billet size according to the die size as 3mm*8.1mm*3mm, and the die-extrusion channel size as 3mm*8mm*3mm, place the magnesium alloy billet Put it into a muffle furnace with a temperature of 400°C for 18 hours, then take it out and put it in pure water to cool to room temperature;

[0055] Step 2. Position and assemble the mold-upper die 3 and the die-down die 4 of the mold one to form a mold-die, and heat the mold-die and mold-punch 1 in a muffle furnace at 400°C for 1.5 hours. And evenly smear lubricant (No. 74 cylinder oil and graphite with a particle size of 400 mesh) in the first cavity of the mold. The mold is fixed on the extruder table;

[0056] Step 3. Preheat the homogenized magnesium alloy billet, heat it in a muffle furnace at 450° C. for 30...

Embodiment 2

[0063] A method for preparing a high-performance magnesium alloy with large plastic deformation, comprising the steps of:

[0064] Step 1. Select a die with a die-extrusion ratio of 1, select the corresponding magnesium alloy billet size according to the die size as 6mm*6.1mm*6mm, and the die-extrusion channel size as 12mm*3mm*6mm, place the magnesium alloy billet Put it into a muffle furnace with a temperature of 450°C for 12 hours, then take it out and put it in pure water to cool to room temperature;

[0065] Step 2. Position and assemble the upper die 3 of die one and the lower die 4 of die one to form a die one die, heat the die one die and die one punch 1 to 320°C for 1 hour, and place them in the die one Apply lubricant evenly in the cavity of the concave mold (70% of No. 74 cylinder oil and 30% of molybdenum disulfide with a particle size of 400 mesh), and then fix the mold and the concave mold on the extruder workbench;

[0066] Step 3. Preheat the homogenized magnes...

Embodiment 3

[0073] A method for preparing a high-performance magnesium alloy with large plastic deformation, comprising the steps of:

[0074] Step 1. Select a die with a die-extrusion ratio of 1.4, select the corresponding magnesium alloy billet size 8mm*13.6mm*7.5mm according to the die size, and the die-extrusion channel size is 18mm*6mm*7.5mm, and the magnesium alloy billet Put it into a muffle furnace with a temperature of 350°C for 25 hours, then take it out and put it into pure water to cool to room temperature;

[0075] Step 2. Position and assemble the mold-upper die 3 and the die-down die 4 of mold one to form mold-die, preheat mold-die and mold-punch 1 in a muffle furnace at 370°C Keep warm for 2 hours, and evenly apply lubricant (glass lubricant with a particle size of 109~190μm) in the first concave mold cavity of the mold, and then fix the first concave mold on the extruder workbench;

[0076] Step 3. Heating the homogenized magnesium alloy billet to 400° C. for 20 minutes,...

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
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a device for preparing high-performance magnesium alloys with large plastic deformation, which includes a mold 1 and a mold 2 with the same structure. There is an extrusion channel in the shape of a cuboid, and the upper die is vertically penetrated with a punch channel, and the punch channel communicates with the extrusion channel and cooperates with the punch; the width of the upper punch channel on the first mold is the same as that on the second extrusion The channel heights are equal, the width of the punch channel on the second mold is equal to the height of the extrusion channel on the mold one; the thicknesses of the punch channel and the extrusion channel are equal. The invention provides a device and method for preparing a high-performance magnesium alloy with large plastic deformation. By changing the mold and repeatedly upsetting and extruding the magnesium alloy to continuously accumulate strain, it is expected that each particle of the magnesium alloy will uniformly produce angular shear, expansion and upsetting deformation. , and finally the texture can be weakened while forming a uniform fine-grained structure, and a high-performance magnesium alloy can be prepared.

Description

technical field [0001] The invention belongs to the technical field of metal material processing equipment, and specifically relates to a device and a preparation method for preparing a high-performance magnesium alloy with large plastic deformation. Background technique [0002] The more prominent advantages of magnesium and magnesium alloys are high specific strength and specific stiffness, and they are currently the lightest metal structural materials, which have been widely used in various fields. However, magnesium and magnesium alloys have a close-packed hexagonal crystal structure, and their plastic workability in a cold state is poor. At present, magnesium alloy products are mainly castings, especially die castings. However, cast magnesium alloys have disadvantages such as uneven grains, coarse grains, poor mechanical properties, and prone to defects, which greatly limit the application range of magnesium alloys. [0003] Relevant studies have shown that: magnesium ...

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 Patents(China)
IPC IPC(8): B21J5/00B21J5/02B21J13/02B21C23/00B21C25/02
CPCB21C23/002B21C25/02B21J5/002B21J5/02B21J13/02
Inventor 卢立伟项瑶刘剑波李宏贤蔡志华刘楚明刘龙飞
Owner HUNAN UNIV OF SCI & TECH
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