Unlock instant, AI-driven research and patent intelligence for your innovation.

A high-strength heat-resistant magnesium alloy with long-period structural strengthening and its preparation method

A technology for magnesium alloys and intermediate alloys, applied in the field of metal smelting, can solve the problems of poor heat resistance and insufficient strength of magnesium alloys, and achieve the effects of easy operation, refined grain size, and excellent medium and high temperature strengthening effect.

Active Publication Date: 2021-08-31
北京雅泊科技有限公司
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problems of insufficient magnesium alloy strength and poor heat resistance in the above prior art, and provides a high-strength heat-resistant magnesium alloy with long-period structural strengthening and a preparation method thereof

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
  • A high-strength heat-resistant magnesium alloy with long-period structural strengthening and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1, a long-period structurally strengthened high-strength heat-resistant magnesium alloy, including the following elements in mass percentage: Gd: 7.4wt%; Y: 1.6wt%; Zn: 0.3wt%; Cu: 0.4wt%; Zr: 0.13wt% impurity elements Si, Fe, Ni are not more than 0.015wt.%, the balance is Mg.

[0027] Its preparation method comprises the following steps:

[0028] (1) Preheat high-purity magnesium, pure Cu, pure Zn, Mg-25wt.% Gd master alloy, Mg-25wt.% Y master alloy, and Mg-30wt.% Zr master alloy at 182 ° C;

[0029] (2) Raise the temperature to 720°C, heat and melt the magnesium ingot in the crucible, and when the magnesium ingot starts to melt, introduce CO 2 +0.5vol%SF 6 Mix the gas until the pure magnesium ingot is completely melted, then add pure Zn and pure Cu into the molten magnesium at 760°C, and stir for 5 minutes after fully dissolving;

[0030] (3) Heat up to 784°C, add Mg-25wt.% Gd master alloy, Mg-25wt.% Y master alloy, Mg-30wt.% Zr master alloy, stir for 5 min...

Embodiment 2

[0035] Example 2, a long-period structurally strengthened high-strength heat-resistant magnesium alloy, including the following elements in mass percentage: Gd: 7.3wt%; Y: 1.8wt%; Zn: 0.41wt%; Cu: 0.45wt%; Zr: 0.15wt%; the impurity elements Si, Fe, Ni are not more than 0.015wt.%, and the balance is Mg. Its preparation method comprises the following steps:

[0036] (1) Preheat high-purity magnesium, pure Cu, pure Zn, Mg-25wt.% Gd master alloy, Mg-25wt.% Y master alloy, and Mg-30wt.% Zr master alloy at 180°C respectively;

[0037] (2) Raise the temperature to 725°C, heat and melt the magnesium ingot in the crucible, and when the magnesium ingot starts to melt, introduce CO 2 +0.5vol%SF 6 Mix the gas until the pure magnesium ingot is completely melted, add pure Zn and pure Cu to the magnesium liquid at 745°C, and stir for 5 minutes after fully dissolving;

[0038] (3) Heat up to 794°C, add Mg-25wt.% Gd master alloy, Mg-25wt.% Y master alloy, Mg-30wt.% Zr master alloy, stir for...

Embodiment 3

[0042] Example 3, a long-period structurally strengthened high-strength heat-resistant magnesium alloy, the magnesium alloy includes the following elements in mass percentage: Gd: 7.0wt.%; Y: 1.9wt%; Zn: 0.33wt%; Cu: 0.41wt% %; Zr: 0.23wt%; impurity elements Si, Fe, Ni are not more than 0.015wt.%, and the balance is Mg. Its preparation method comprises the following steps:

[0043] (1) Preheating high-purity magnesium, pure Cu, pure Zn, Mg-25wt.% Gd master alloy, Mg-25wt.% Y master alloy, and Mg-30wt.% Zr master alloy at 181°C;

[0044] (2) Raise the temperature to 722°C, heat and melt the magnesium ingot in the crucible, when the magnesium ingot begins to melt, feed CO2+0.5vol% SF6 mixed gas until the pure magnesium ingot is completely melted, add pure magnesium ingot to the 744°C magnesium liquid After Zn and pure Cu are fully dissolved, stir for 5 minutes;

[0045] (3) Heat up to 783°C, add Mg-25wt.% Gd master alloy, Mg-25wt.% Y master alloy, Mg-30wt.% Zr master alloy, st...

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 discloses a magnesium alloy, which comprises the following elements in mass percentage: Gd: 6.5wt%-8.0wt%; Y: 1.0wt%-2.2wt%; Zn: 0.2wt%-0.6wt%; Cu: 0.3 wt%~0.6wt%; Zr: 0.1wt%~0.5wt%; impurity elements Si, Fe, Ni are not more than 0.02wt.%, the balance is Mg; the (Gd+Y) / (Zn+Cu) The ratio of mass percent to 10-20:1. The long-period structure-strengthened high-strength heat-resistant magnesium alloy of the present invention obtains a long-period phase with excellent medium-high temperature strengthening effect by designing and improving the alloy composition, further refines the grain size through a large deformation extrusion process, and combines The aging treatment fully develops the strengthening effect of the second phase of the alloy, and the method of the invention has the advantages of simple process and easy operation.

Description

technical field [0001] The invention relates to the technical field of metal smelting, in particular to a long-period structurally strengthened high-strength heat-resistant magnesium alloy and a preparation method thereof. Background technique [0002] As the lightest commercial metal engineering structural material, magnesium alloy has the advantages of high specific strength and specific stiffness, superior damping and shock absorption performance, and easy recycling. It is known as "green structural material in the 21st century". However, the lack of strength and poor heat resistance of magnesium alloys have seriously hindered the pace of magnesium alloys replacing aluminum alloys and other materials in aerospace, military and other industries. [0003] The existing heat-resistant magnesium alloys mainly achieve the purpose of improving the thermal strength of magnesium alloys by the following means: (1) introducing a second phase with high thermal stability; (2) reducing...

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): C22C23/06C22C1/03C22F1/06
CPCC22C1/03C22C23/06C22F1/06
Inventor 施斌卿聂宝华陈东初罗铭强聂德键李辉
Owner 北京雅泊科技有限公司