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

Preparation process of a high strain rate superplastic rare earth magnesium alloy

A technology with high strain rate and preparation technology, which is applied in the field of preparation technology of high strain rate superplastic rare earth magnesium alloy, can solve the problems of inability to achieve high strength and high plasticity, and decrease elongation, so as to reduce processing cost and increase elongation , The effect of improving processing efficiency

Active Publication Date: 2021-09-28
HOHAI UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In previous studies, researchers have been committed to improving the extrusion pass and increasing the amount of deformation to obtain a uniform ultra-fine-grained structure. Compared with the coarse-grained structure, the strength is significantly improved, but the elongation is significantly reduced, and it is impossible to achieve high strength and high 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
  • Preparation process of a high strain rate superplastic rare earth magnesium alloy
  • Preparation process of a high strain rate superplastic rare earth magnesium alloy
  • Preparation process of a high strain rate superplastic rare earth magnesium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]Preparation of low temperature high strain rate superplastic rare earth magnesium alloy. With pure magnesium (99.95wt%), Mg-20Er (wt%), Mg-30Y (wt%), pure zinc (99.95wt%) in the ratio of 37:10:18:2 as raw material in CO 2 (99vol%) and SF 6 (1vol%) melting at 700°C under a protective atmosphere of mixed gas to obtain rare earth magnesium alloy Mg-8Y-2Er-3Zn, and then pouring water cooling to obtain the original cast rare earth magnesium alloy, and the obtained original grain size is 150-160 μm; Cut out a cuboid ECAP sample with a size of 50×20×20mm by using a wire electric discharge machine; after the block sample is fully isolated from the air, it is buried and compacted with graphite, and placed in a constant temperature timing horse boiling furnace for 12h solidification at 500°C. Dissolution treatment; keep warm and heat the ECAP mold to 400°C, then put the magnesium alloy sample uniformly coated with graphite emulsion into the mold and keep it warm for 10 minutes, a...

Embodiment 2

[0039] With pure magnesium (99.95wt%), Mg-20Er (wt%), Mg-30Y (wt%), pure zinc (99.95wt%) in the ratio of 37:10:18:2 as raw material in CO 2 (99vol%) and SF 6 (1vol%) melting at 700°C under a protective atmosphere of mixed gas to obtain rare earth magnesium alloy Mg-8Y-2Er-3Zn, and then pouring water cooling to obtain the original cast rare earth magnesium alloy, and the obtained original grain size is 150-160 μm; Cut out a cuboid ECAP sample with a size of 50×20×20mm by using a wire electric discharge machine; after the block sample is fully isolated from the air, it is buried and compacted with graphite, and placed in a constant-temperature timing horse-boiler for 10 hours of solidification at 500°C. Dissolution treatment; keep warm and heat the ECAP mold to 400°C, then put the magnesium alloy sample uniformly coated with graphite milk into the mold and keep it warm for 10 minutes, and then perform 32 passes of ECAP processing; the sample after ECAP processing is processed by...

Embodiment 3

[0041] Preparation of low temperature high strain rate superplastic rare earth magnesium alloy. With pure magnesium (99.95wt%), Mg-20Er (wt%), Mg-30Y (wt%), pure zinc (99.95wt%) in the ratio of 37:10:18:2 as raw material in CO 2 (99vol%) and SF 6 (1vol%) melting at 700°C under a protective atmosphere of mixed gas to obtain rare earth magnesium alloy Mg-8Y-2Er-3Zn, and then pouring water cooling to obtain the original cast rare earth magnesium alloy, and the obtained original grain size is 150-160 μm; Cut out a cuboid ECAP sample with a size of 50×20×20mm by using a wire electric discharge machine; after the block sample is fully isolated from the air, it is buried and compacted with graphite, and placed in a constant-temperature timing horse-boiler for 10 hours of solidification at 495°C. Dissolution treatment; keep warm and heat the ECAP mold to 380°C, then put the magnesium alloy sample uniformly coated with graphite emulsion into the mold and keep it warm for 10 minutes, a...

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
tensile strength at breakaaaaaaaaaa
tensile strength at breakaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation process of a high-strain rate superplastic rare-earth magnesium alloy, which comprises the following steps: subjecting a prefabricated rare-earth magnesium alloy sample to an air-isolated solid solution treatment at 495-505°C for 10-12 hours; heat preservation and heating, etc. Channel angular extrusion die to 380‑410 °C, put the rare earth magnesium alloy sample after the air-isolated solid solution treatment into the heated equal channel angular extrusion die for 10‑15min; for the rare earth magnesium alloy sample after heat preservation Carry out at least one group of equal channel angular extrusion processing; wherein, one group is equal channel angular extrusion processing of 4 passes; fully immerse the rare earth magnesium alloy sample after equal channel angular extrusion processing in silicone oil for 200 ° C Under 110‑130h aging heat treatment, a rare earth magnesium alloy with uniformly dispersed and precipitated second phase is obtained; the preparation process of the present invention is simple, and the obtained magnesium alloy has a uniform internal structure, fine grains and uniformly dispersed distribution of the second phase.

Description

technical field [0001] The invention relates to the technical field of metal material processing, in particular to a preparation process of a high strain rate superplastic rare earth magnesium alloy. Background technique [0002] As the lightest metal structural material, magnesium alloy has the advantages of high specific strength, specific stiffness, abundant reserves and easy recycling. It is an ideal structural material for rail transit, aerospace, 3C products, etc. However, the absolute strength of magnesium alloy is insufficient, the room temperature plasticity is limited, and the plastic formability is poor, which greatly limits its application. Therefore, improving the strength and toughness of magnesium alloys and preparing low-temperature and high-speed superplastic magnesium alloys are urgent problems to be solved in the field of magnesium alloys. [0003] As a structural material with great potential, magnesium alloy can greatly reduce the environmental pressure...

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): C22F1/06C22F1/02C22C23/06C22C1/03
CPCC22C1/03C22C23/06C22F1/02C22F1/06
Inventor 江静华吴浩然马爱斌刘欢
Owner HOHAI 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

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