High-strength and heat-resistant magnesium alloy containing two rare earths and preparation method thereof

A magnesium alloy and rare earth metal technology, which is applied in the fields of high-strength and heat-resistant magnesium alloys and their preparation and processing, and industrial magnesium alloys, can solve the problems of limited magnesium alloys, difficult to satisfy comprehensive strength and service performance, and insufficiently dense magnesium alloy castings.

Active Publication Date: 2014-05-28
GRIMAT ENG INST CO LTD
View PDF5 Cites 39 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the relatively few slip systems of magnesium alloys and good casting performance, the development of cast magnesium alloys is better than that of wrought magnesium alloys. However, the material of magnesium alloy ca...

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: 1000Kg Mg-12Gd-1.5Y-0.5Er-1.0Ce-0.3Zr magnesium alloy and its workpiece forging processing method.

[0034] 1. Melting preparation

[0035] Turn on the power supply of the preheating furnace and the melting furnace, and heat up. Raise the temperature of the preheating furnace to 300~350°C, raise the temperature of the melting furnace to 600~620°C, and pass protective gas (argon and CO2) into the melting furnace 2 Mixed gas, the volume ratio of the two is about 3:2);

[0036] 2. Preheating and melting of pure magnesium ingot

[0037] Use a preheating furnace to preheat 850Kg pure magnesium ingots with a clean surface to 300°C to ensure that there is no water vapor on the surface. First add 300Kg of pure magnesium ingots with a clean surface to make them completely melt under the protection of the aforementioned mixed gas, then add the pure magnesium ingots preheated to the set temperature into the melting furnace in batches, the specific addition amount ...

Embodiment 2

[0053] Embodiment 2: 1000 kilograms of Mg-13.0Gd-2.0Y-1.0Er-1.5MM-0.5Zr magnesium alloy and its bar extrusion processing method.

[0054] 1. Melting preparation

[0055]Turn on the power supply of the preheating furnace and the melting furnace, and heat up. Raise the temperature of the preheating furnace to 400~450°C, raise the temperature of the melting furnace to 650~670°C, and pass protective gas (argon and CO 2 Mixed gas, the volume ratio of the two is about 3:2);

[0056] 2. Preheating and melting of pure magnesium ingot

[0057] The 825Kg pure magnesium ingot with a clean surface is preheated in a preheating furnace to ensure that there is no water vapor on the surface. First add 300Kg of pure magnesium ingots with a clean surface to make them completely melt under the protection of the aforementioned mixed gas, then add the pure magnesium ingots preheated to the set temperature into the melting furnace in batches, the specific addition amount is that the magnesium in...

Embodiment 3

[0073] Embodiment 3: 1000 kilograms of Mg-14.0Gd-1.0Y-1.0Er-1.2MM-0.6Zr magnesium alloy and its plate processing method.

[0074] 1. Melting preparation

[0075] Turn on the power supply of the preheating furnace and the melting furnace, and heat up. Raise the temperature of the preheating furnace to 370~420°C, raise the temperature of the melting furnace to 650~680°C, and pass protective gas (argon and CO) into the melting furnace 2 Mixed gas, the volume ratio of the two is about 3:2);

[0076] 2. Preheating and melting of pure magnesium ingot

[0077] The 820Kg pure magnesium ingot with a clean surface is preheated in a preheating furnace to ensure that there is no water vapor on the surface. First add 300Kg of pure magnesium ingots with a clean surface to make them completely melt under the protection of the aforementioned mixed gas, then add the pure magnesium ingots preheated to the set temperature into the melting furnace in batches, the specific addition amount is th...

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
Tensile strengthaaaaaaaaaa
Yield strengthaaaaaaaaaa
Yield strengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses a high-strength and heat-resistant magnesium alloy containing two rare earths. The high-strength and heat-resistant magnesium alloy containing the two rare earths comprises the components as follows: 14.0-17.0wt% of Y rare earth, namely Gd, Y and Er, 0.5-2.5wt% of Ce rare earth, namely one or several of La, Ce, Pr, Nd and Sm, 0.3-1.0wt% of Zr, impurities and the balance of Mg, wherein Gd is 11.0-15.0wt%, Y is 0.5-4.0wt% and Er is 0.5-2.0wt%; the content of Nd and Sm elements is 0.2wt% or less of the total amount of the magnesium alloy, or 0; the impurities including Fe, Si, Mn and a small amount of chloride; Fe is less than or equal to 0.002wt %, Si is less than or equal to 0.04wt%, Mn is less than or equal to 0.02wt%, and chloride is less than or equal to 0.002wt%; the impurity content is more than 0; Er in the Y rare earth can be replaced by one or several of Tb, Dy, Ho, Yb and Tm. The magnesium alloy has relatively high mechanical properties at room temperature and relatively stable high temperature creep resistance, and has relatively high yield rate of rare earth elements in the smelting process.

Description

technical field [0001] The invention relates to a high-strength heat-resistant magnesium alloy containing two-series rare earths and a preparation and processing method thereof. The so-called two-series rare earths refer to Y-series rare earths (metals with atomic numbers from 64(Gd)-71(Lu) and Y) and Ce-series Rare earths (metals with atomic numbers ranging from 57(La) to 63(Eu)) belong to the category of industrial magnesium alloys. Background technique [0002] The density of magnesium is about 2 / 3 of that of aluminum and 1 / 4 of that of steel. Compared with other metal structural materials, magnesium and magnesium alloys have high specific strength, specific stiffness, shock absorption, thermal conductivity, machinability and recyclability, as well as electromagnetic shielding and high radiation resistance, so in Automobiles, electronics, electrical appliances, aviation, aerospace and national defense military fields have extremely important application value and broad a...

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): C22C23/06C22C1/03C22F1/06
Inventor 马鸣龙张奎李兴刚李永军石国梁夏祥生米绪军熊柏青
Owner GRIMAT ENG INST CO LTD
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