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

High-strength heat-resistant rare earth magnesium alloy and preparation method thereof

A rare earth magnesium and magnesium alloy technology, applied in the field of magnesium alloys, can solve the problems of alloy cost increase, consumption, and more rare earths

Active Publication Date: 2018-11-13
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
View PDF2 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing technology can effectively pin basal slip through rare earth precipitates, if you want to pin non-basal slip at high temperature, you need to consume more rare earths to form basal precipitates, which increases the cost of the 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
  • High-strength heat-resistant rare earth magnesium alloy and preparation method thereof
  • High-strength heat-resistant rare earth magnesium alloy and preparation method thereof
  • High-strength heat-resistant rare earth magnesium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] According to the preset composition: Sm2wt%, Gd2wt%, Zn 0.5wt%, Zr 0.5wt%, the balance is Mg and unavoidable impurities, the synthetic composition, Mg source, Zn source, Sm source, Gd source and Zr During the batching process, the oxide skin on the surface of each raw material is removed, and they are preheated to 200°C;

[0090] Preheat the crucible to 500°C, add the above preheated Mg source, raise the furnace temperature to 720°C, and inject SF with a volume ratio of 1:100 6 and CO 6 The mixed gas is used for magnesium smelting;

[0091] After the Mg source is completely melted, a Mg alloy liquid is obtained; adding the above-mentioned preheated Sm source, Zn source and Gd source to the Mg alloy liquid, stirring evenly for 10 minutes for smelting, to obtain a mixed liquid;

[0092] Raise the temperature of the furnace to 760°C, add the above-mentioned preheated Zr source to the mixed liquid, stir evenly for 10 minutes for smelting, and obtain the alloy liquid;

[...

Embodiment 2

[0101] According to the preset composition: Sm3wt%, Gd3wt%, Zn 1.5wt%, Zr 1.5wt%, the balance is Mg and unavoidable impurities, the synthetic composition, Mg source, Zn source, Sm source, Gd source and Zr During the batching process, the scale on the surface of each raw material is removed, and they are preheated to 300°C;

[0102] Preheat the crucible to 500°C, add the above preheated Mg source, raise the furnace temperature to 730°C, and inject SF with a volume ratio of 1:100 6 and CO 6 The mixed gas is used for magnesium smelting;

[0103] After the Mg source is completely melted, a Mg alloy liquid is obtained; adding the above-mentioned preheated Sm source, Zn source and Gd source to the Mg alloy liquid, stirring evenly for 5 minutes for smelting, to obtain a mixed liquid;

[0104] Raise the furnace temperature to 770°C, add the above-mentioned preheated Zr source to the mixed liquid, stir evenly for 5 minutes for smelting, and obtain the alloy liquid;

[0105] Lower th...

Embodiment 3

[0113] According to the preset composition: Sm 5wt%, Y 3wt%, Zn 2wt%, Zr 1.5wt%, the balance is Mg and unavoidable impurities, the synthetic composition, Mg source, Zn source, Sm source, Y source and The Zr source is used for batching. During the batching process, the scale on the surface of each raw material is removed, and they are preheated to 300°C;

[0114] Preheat the crucible to 500°C, add the above preheated Mg source, raise the furnace temperature to 760°C, and inject SF with a volume ratio of 1:100 6 and CO 6 The mixed gas is used for magnesium smelting;

[0115] After the Mg source is completely melted, a Mg alloy liquid is obtained; adding the above-mentioned preheated Sm source, Zn source and Y source to the Mg alloy liquid, stirring evenly for 15 minutes for smelting, to obtain a mixed liquid;

[0116] Raise the temperature of the furnace to 770°C, add the above-mentioned preheated Zr source to the mixed liquid, stir evenly for 15 minutes for smelting, and obta...

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 provides a high-strength heat-resistant rare earth magnesium alloy. The high-strength heat-resistant rare earth magnesium alloy comprises 2-6 wt% of Sm, 0-3 wt% of Nd, 2-5 wt% of heavy rare earth elements, 0.5-4 wt% of Zn, 0.2-3 wt% of Zr, and the balance Mg and inevitable impurities. According to the high-strength heat-resistant rare earth magnesium alloy, the influence of elementssuch as Sm and the heavy rare earth on an electron migration state of the Zr element is utilized, so that Zr in a Zr-rich ring is separated out on a pyramidal surface of a magnesium alloy matrix in aZn-Zr heat-resistant compound form in a heat treatment process. In a high-temperature condition, a Zn-Zr phase can effectively inhibit a non-basal plane slip, a Mg-RE precipitated phase is formed through the heat treatment on the basis, and meanwhile, the magnesium alloy matrix is reinforced. The two phases in the magnesium alloy provided by the invention can effectively inhibit a high-temperatureprismatic slip, a pyramidal slip and a basal slip, and the high-temperature strength of the magnesium alloy is improved. The invention further provides a preparation method of the high-strength heat-resistant rare earth magnesium alloy.

Description

technical field [0001] The invention relates to the technical field of magnesium alloys, in particular to a high-strength heat-resistant rare earth magnesium alloy and a preparation method thereof. Background technique [0002] Magnesium alloy is the lightest metal structure material. It has a series of advantages such as high specific strength and specific stiffness, good vibration and noise reduction and electromagnetic shielding performance, strong resistance to dynamic impact loads, and rich resources, making it widely used in national economy and national defense construction. has great application prospects. Mg-Zn and Mg-Al traditional magnesium alloys have low high-temperature strength, and their current applications are mainly concentrated in non-load-bearing structural parts. With the development of weapons and equipment, the requirements for lightweight and strength are getting higher and higher. In major national projects and military fields such as large aircraf...

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): C22C23/06C22C1/02C22F1/06
CPCC22C1/02C22C23/06C22F1/06
Inventor 张洪杰程丽任车朝杰佟立波孟健
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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