High strength and toughness heat resistant die casting mg-y-er alloy and preparation method thereof

A mg-y-er, hot die casting technology, used 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, which can solve the problem of insufficient heat resistance and inability to achieve Die-casting aluminum alloy performance and other issues, to achieve the effect of high efficiency and simple process

Active Publication Date: 2021-07-09
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF18 Cites 0 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 strength and toughness heat resistant die 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-strength and toughness heat-resistant die-casting Mg-Y-Er alloy and a preparation method thereof. The alloy mass percentage elements are 3.0-7.0% RE, 1.2-4.2% Zn, 0.5-1.2% Al, 0.1-0.3% Mn, 0.01-0.08% M, the balance being Mg; wherein M is Ti, one or two elements in B. Preparation method: 1) batching according to the composition of Mg‑Y‑Er alloy; 2) melting industrial pure magnesium ingot; 3) heating up to 720°C, and mixing industrial pure zinc, Mg‑Y, Mg‑Er and Mg‑Mn master alloy Add and stir until fully melted; 4) heat up to 730°C, after adding industrial pure aluminum ingots, Al-Ti, Al-Ti-B, and Al-B intermediate alloys successively to melt, obtain a magnesium alloy melt after refining; ( 5) cooling the magnesium alloy melt to the die-casting temperature for die-casting to obtain a die-cast alloy. After die-casting, the alloy of the present invention has a tensile strength of 312MPa at room temperature in a die-cast state, 205MPa at 200°C, and 13.0% elongation at room temperature, and can be used without aging or solution heat treatment, meeting the needs of aerospace, etc. The industry's high-end demand for lightweight.

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 Patents(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 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