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

A kind of silver-containing rare earth high-strength heat-resistant magnesium alloy and its preparation method

A magnesium alloy and rare earth technology is applied in the field of high-strength and heat-resistant magnesium alloy containing silver rare earth and its preparation.

Inactive Publication Date: 2017-02-15
李克杰 +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it has good heat resistance, the high content of the heavy rare earth element Gd (up to 14%) causes the problem of high cost, and it mainly utilizes the aging strengthening of Gd in the solid solution of magnesium and Solid solution strengthening effect, and the equilibrium phase formed by adding rare earth Y and Sm and magnesium, so as to achieve the strengthening effect of room temperature and high temperature mechanical properties, the overall amount of rare earth is too high, which is not conducive to reducing costs and other issues

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

[0026] The silver-containing rare earth high-strength heat-resistant magnesium alloy of the present embodiment consists of the mass percentages of the following components:

[0027] Gd: 6.0wt%; Sm: 2.0wt%; Nd: 2.0wt%, Ag: 0.3wt%; Zr: 0.4wt%; the balance is Mg and unavoidable impurities, and its impurity elements are Si, Fe, Cu and Ni The total amount is less than 0.025%.

[0028] The above-mentioned silver-containing rare earth high-strength heat-resistant magnesium alloy can be prepared by the following method:

[0029] Alloy raw materials are formulated according to the above ingredients, and the melting and casting process is as follows: the alloy is refined in a corundum crucible.

[0030] Preheat pure magnesium, master alloys Mg-Gd, Mg-Nd, Mg-Sm and Mg-Zr to 120°C; then, put the preheated pure magnesium into CO 2 / SF 6Melt in a gas-protected melting furnace. After the magnesium is melted, add Mg-Gd master alloy to melt it when the temperature is controlled at 730°C. Af...

Embodiment 2

[0033] The silver-containing rare earth high-strength heat-resistant magnesium alloy of the present embodiment consists of the mass percentages of the following components:

[0034] Gd: 6.0wt%; Sm: 3.0wt%; Nd: 2.5wt%, Ag: 1.5wt%; Zr: 0.8wt%; the balance is Mg and unavoidable impurities, and its impurity elements are Si, Fe, Cu and Ni The total amount is less than 0.025%.

[0035] The above-mentioned silver-containing rare earth high-strength heat-resistant magnesium alloy can be prepared by the following method:

[0036] Alloy raw materials are formulated according to the above ingredients, and the melting and casting process is as follows: the alloy is refined in a corundum crucible.

[0037] Preheat pure magnesium, master alloys Mg-Gd, Mg-Nd, Mg-Sm and Mg-Zr to 110°C; then, put the preheated pure magnesium into CO 2 / SF 6 Melt in a gas-protected melting furnace. After the magnesium is melted, add Mg-Gd master alloy to melt at a controlled temperature of 710°C. After Mg-Gd...

Embodiment 3

[0040] The silver-containing rare earth high-strength heat-resistant magnesium alloy of the present embodiment consists of the mass percentages of the following components:

[0041] Gd: 8.6wt%; Sm: 2.5wt%; Nd: 0.5wt%, Ag: 1.0wt%; Zr: 0.6wt%; the balance is Mg and unavoidable impurities, and its impurity elements are Si, Fe, Cu and Ni The total amount is less than 0.025%.

[0042] The above-mentioned silver-containing rare earth high-strength heat-resistant magnesium alloy can be prepared by the following method:

[0043] Alloy raw materials are formulated according to the above ingredients, and the melting and casting process is as follows: the alloy is refined in a corundum crucible.

[0044] Preheat pure magnesium, master alloys Mg-Gd, Mg-Nd, Mg-Sm and Mg-Zr to 150°C; then, put the preheated pure magnesium into CO 2 / SF 6 Melt in a gas-protected melting furnace. After the magnesium is melted, add Mg-Gd master alloy to melt at a controlled temperature of 725°C. After Mg-Gd...

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
tensile strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a silver and rare earth-containing high-strength heat-resistant magnesium alloy and a preparation method thereof, belonging to the technical field of an alloy material and aiming at realizing the high strength effect at a high temperature of the alloy. According to the silver and rare earth-containing high-strength heat-resistant magnesium alloy and the preparation method thereof, the magnesium alloy comprises the following components in percentage by mass: 6.0wt%-10wt% of Gd, 2.0wt%-4.0wt% of Sm, 0.5wt%-2.5wt% of Nd, 0.3wt%-1.5wt% of Ag, 0.4wt%-0.8wt% of Zr and the balance of Mg. The method comprises the following steps: preheating, melting and thermal-treating the raw materials, to obtain the corresponding silver and rare earth-containing high-strength heat-resistant magnesium alloy. The magnesium alloy has the effect of being high in heat-resistant strength at a high temperature.

Description

technical field [0001] The invention relates to a silver-containing rare earth high-strength heat-resistant magnesium alloy and a preparation method thereof, belonging to the technical field of alloy materials. Background technique [0002] Magnesium alloy is currently a relatively light metal material, with high specific strength and specific stiffness, good antimagnetic, electronegativity, thermal conductivity, shock absorption and cutting performance, etc., but the strength of magnesium alloy is insufficient and The poor heat resistance has seriously hindered the pace of magnesium alloys replacing aluminum alloys and other materials in aerospace, military and other industries. [0003] The performance of existing heat-resistant magnesium alloys cannot exceed that of aluminum alloys. On the one hand, it is related to the performance of magnesium itself, and on the other hand, the heat-resistant performance of magnesium materials needs to be discovered. Existing heat-resis...

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): C22C23/06C22C1/03
Inventor 李克杰黄圣楠唐杰
Owner 李克杰