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

High-toughness heat-resisting pressure casting Mg-Y-Er alloy and preparation method thereof

A mg-y-er, hot die-casting technology, applied in the preparation of high-strength, toughness and heat-resistant die-casting Mg-Y-Er alloys, and the field of high-strength, toughness and heat-resistant die-casting Mg-Y-Er alloys, can solve the problem that the performance of die-casting aluminum alloys cannot be achieved, Insufficient heat resistance and other problems, to achieve the effects of enhancing room temperature mechanical properties and high temperature properties, good high temperature stability, and improved high temperature creep properties

Active Publication Date: 2019-05-28
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF18 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In order to solve the industrial problem that the existing die-casting magnesium alloy cannot reach the performance of die-casting aluminum alloys such as A380 due to insufficient strength, toughness and heat resistance, resulting in its application being greatly restricted, the present invention provides high-strength, toughness and heat-resistant die-casting Mg-Y- Er alloy and its preparation method for pressure casting. After the alloy is pressure cast, the room temperature tensile strength of the die-cast alloy reaches 312MPa, the high temperature tensile strength at 200°C reaches 205MPa, and the room temperature elongation reaches 13.0%.

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-toughness heat-resisting pressure casting Mg-Y-Er alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The weight percentage of the high-strength and tough heat-resistant die-casting Mg-Y-Er alloy is: according to the theoretical ratio, 0.6% Er, 2.4% Y, 1.2% Zn, 1.2% Al, 0.3% Mn, 0.01% Ti, 0.01% B, and the rest The amount is Mg and other unavoidable impurities. Preparation:

[0030](1) After properly considering the burning loss, calculate the amount of raw materials required according to the above-mentioned Mg-Y-Er alloy composition and stoichiometric ratio; combine industrial pure magnesium ingots, industrial pure zinc, industrial pure aluminum ingots and MgY25, MgEr30 and MgMn10 The master alloys were all deoxidized and dried and preheated to 200°C.

[0031] (2) After melting the commercially pure magnesium ingots accounting for 25% of the height of the crucible into a molten pool at 680° C., the protective gas argon is introduced, and the remaining magnesium ingots are added.

[0032] (3) After the magnesium ingots are completely melted, raise the temperature to 72...

Embodiment 2

[0037] The weight percentage of the high-strength and tough heat-resistant die-casting Mg-Y-Er alloy is: according to the theoretical ratio, 4.0% Er, 1.0% Y, 2.0% Zn, 0.5% Al, 0.1% Mn, 0.08% Ti, and the balance is Mg and other unavoidable impurities. Preparation:

[0038] (1) After properly considering the burning loss, calculate the amount of required raw materials according to the above-mentioned Mg-Y-Er alloy composition and stoichiometric ratio; combine industrial pure magnesium ingots, industrial pure zinc, industrial pure aluminum ingots and MgY30, MgEr30 and MgMn10 The master alloys were all deoxidized and dried and preheated to 200°C.

[0039] (2) After melting the commercially pure magnesium ingot accounting for 25% of the height of the crucible into a molten pool at 680 ° C, pass through a protective gas containing 0.2% volume fraction of SF 6 and CO 2 The mixed gas, add the remaining magnesium ingots.

[0040] (3) After the magnesium ingots are completely melted...

Embodiment 3

[0045] The weight percentage of the high-strength and tough heat-resistant die-casting Mg-Y-Er alloy is: according to the theoretical ratio, 5.0% Er, 2.0% Y, 1.4% Zn, 0.7% Al, 0.2% Mn, 0.05% Ti, 0.03% B, and the rest The amount is Mg and other unavoidable impurities. Preparation:

[0046] (1) After properly considering the burning loss, calculate the amount of required raw materials according to the above-mentioned Mg-Y-Er alloy composition and stoichiometric ratio; combine industrial pure magnesium ingots, industrial pure zinc, industrial pure aluminum ingots and MgY30, MgEr25 and MgMn10 The master alloys were all deoxidized and dried and preheated to 200°C.

[0047] (2) After melting the commercially pure magnesium ingots accounting for 25% of the height of the crucible into a molten pool at 680° C., the protective gas argon is introduced, and the remaining magnesium ingots are added.

[0048] (3) After the magnesium ingots are completely melted, raise the temperature to 7...

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
yield strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention provides a high-toughness heat-resisting pressure casting Mg-Y-Er alloy and a preparation method thereof. The high-toughness heat-resisting pressure casting Mg-Y-Er alloy comprises elements including, by mass percent, 3.0%-7.0% of RE, 1.2%-4.2% of Zn, 0.5%-1.2% of Al, 0.1%-0.3% of Mn, 0.01%-0.08% of M and the balance Mg, wherein M is one or two elements of Ti and B. The preparation method comprises the steps that firstly, materials are prepared according to Mg-Y-Er alloy components; secondly, industrial pure magnesium ingots are melted; thirdly, the temperature is raised to 720 DEG C, industrial pure zinc, Mg-Y, Mg-Er and Mg-Mn intermediate alloys are added and stirred to be completely melted; fourthly, the temperature is raised to 730 DEG C, after industrial pure aluminum ingots, Al-Ti, Al-Ti-B and Al-B intermediate alloys are sequentially added, magnesium alloy melt is obtained after refining; and fifthly, the magnesium alloy melt is cooled to a pressure casting temperature so as to be subjected to pressure casting, and a pressure casting alloy is obtained. After the alloy is subjected to pressure casting, the strength of extension of the alloy in a pressure castingstate at the room temperature reaches 312 MPa, the strength of extension of the alloy at the high temperature of 200 DEG C reaches 205 MPa, the room temperature ductility reaches 13.0%, the high-toughness heat-resisting pressure casting Mg-Y-Er alloy can be used without aging or solution heat treatment, and the high-end requirement of aerospace and other industries for light weight is met.

Description

technical field [0001] The invention relates to a high-strength, toughness and heat-resistant die-casting Mg-Y-Er alloy, which meets the high-end requirements of aerospace, automobile, telecommunications and other industries for lightweight development. The invention also relates to a preparation method of a high-strength and tough heat-resistant die-casting Mg-Y-Er alloy, which belongs to the field of industrial magnesium alloys and their manufacture. Background technique [0002] As the lightest engineering metal material (the density of magnesium is 2 / 3 of aluminum and 1 / 4 of steel), its specific strength is obviously higher than that of aluminum alloy and steel. Higher than engineering plastics, it also has a series of advantages such as good castability, good machinability, good thermal conductivity, damping, strong electromagnetic shielding ability and easy recycling. Wide application prospects. Magnesium alloy has become an ideal material to replace aluminum alloy, ...

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): C22C23/06C22C1/03C22C1/06B22D17/00
Inventor 刘希琴叶兵刘子利刘思雨
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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