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A kind of low-cost high-strength toughness deformable magnesium alloy capable of high-speed extrusion and its preparation method

A wrought magnesium alloy, low-cost technology, applied in the field of metal materials and its processing, can solve the problems of low extrusion speed and mechanical properties, achieve the effects of good comprehensive mechanical properties, improve production efficiency, and inhibit the growth of grains

Active Publication Date: 2021-01-29
天津河北工业大学资产经营有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the deficiency that most of the deformed magnesium alloys in the prior art are difficult to extrude at high speed or the extrusion speed and mechanical properties of a small amount of magnesium alloys that can be extruded at high speed are still generally not high, and proposes a deformed magnesium alloy that can be extruded at high speed and its preparation method

Method used

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  • A kind of low-cost high-strength toughness deformable magnesium alloy capable of high-speed extrusion and its preparation method
  • A kind of low-cost high-strength toughness deformable magnesium alloy capable of high-speed extrusion and its preparation method
  • A kind of low-cost high-strength toughness deformable magnesium alloy capable of high-speed extrusion and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The design selects Mg-2.5Bi-2.5Sn-2Al-0.2Ca (wt%), and forms a magnesium alloy according to the composition ratio. The preparation method includes the following steps:

[0042] ① First clean the melting furnace and heat it up to 450°C, put the magnesium ingot preheated to 200°C into the crucible of the melting furnace and heat it, so that the furnace temperature rises to 720°C at a heating rate of 20°C / min.

[0043] ② After the pure magnesium ingot is completely melted, add pure bismuth and pure Sn preheated to about 50°C, pure aluminum and Mg-20Ca intermediate alloy preheated to about 200°C, and raise the furnace temperature to 750°C and keep it warm to The alloy melts.

[0044] ③ After all the raw materials in step 2) are melted, mechanically stir for 5 minutes, adjust the furnace temperature to 740° C., keep the temperature for 8 minutes, so that all alloying elements are evenly distributed in the magnesium alloy melt.

[0045] ④ Skim off the scum on the surface of ...

Embodiment 2

[0052] The design selects Mg-2.5Bi-2.5Sn-2Al-0.15Ca (wt%), and forms a magnesium alloy according to the composition ratio. The preparation and processing method includes the following steps:

[0053] ① First clean the melting furnace and heat it to 450°C, put the magnesium ingot preheated to 200°C into the crucible of the melting furnace, and heat it so that the furnace temperature rises to 720°C at a heating rate of 20°C / min.

[0054] ② After the pure magnesium ingot is completely melted, add pure bismuth and pure Sn preheated to about 50°C, pure aluminum and Mg-20Ca intermediate alloy preheated to about 200°C, and raise the furnace temperature to 750°C and keep it warm to The alloy melts.

[0055] ③ After all the raw materials in step 2) are melted, mechanically stir for 5 minutes, adjust the furnace temperature to 740° C., keep the temperature for 8 minutes, so that all alloying elements are evenly distributed in the magnesium alloy melt.

[0056] ④ Skim off the scum on th...

Embodiment 3

[0062] The design selects Mg-4Bi-4Sn-1Al-0.3Ca, and forms a magnesium alloy according to the composition ratio. The preparation and processing method includes the following steps:

[0063] ① First clean the melting furnace and heat it to 450°C, put the magnesium ingot preheated to 200°C into the crucible of the melting furnace, and heat it so that the furnace temperature rises to 720°C at a heating rate of 20°C / min.

[0064] ② After the pure magnesium ingot is completely melted, add pure bismuth and pure Sn preheated to about 50°C, pure aluminum and Mg-20Ca intermediate alloy preheated to about 200°C, and raise the furnace temperature to 750°C and keep it warm to The alloy melts.

[0065] ③After all the raw materials in step 2) are melted, mechanically stir for 5 minutes, adjust the temperature of the furnace to 740° C., keep the temperature for 9 minutes, so that all alloy elements are evenly distributed in the magnesium alloy melt.

[0066] ④ Skim off the scum on the surfac...

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Abstract

The invention relates to low-cost high-toughness wrought magnesium alloy capable of being extruded at high speed and a preparation method thereof. The alloy is Mg-Bi-Sn-Al-Ca magnesium alloy and comprises, by mass, 2-45 of Bi, 2-4% of Sn, 1-3% of Al, 0.05-0.5% of Ca and the balance magnesium, wherein the mass ratio of Bi to Sn in the alloy is (0.8-1.2):1. The alloy can be used for high-speed extrusion production at the extrusion speed up to 25 m / min, the production efficiency is improved, and meanwhile, the production cost is reduced. Crystalline grains of a finally extruded product are uniform and fine, a large number of second phases are dispersed in a matrix, the comprehensive mechanical property is good, and the alloy is relatively good in flame retardancy.

Description

technical field [0001] The invention relates to a metal material and an alloy in the field of processing thereof and a preparation method thereof, in particular to a high-strength and tough deformed magnesium alloy with an extrusion speed of 25 m / min and a preparation method thereof. Background technique [0002] Since the 1980s, the urgent requirements for energy saving and environmental protection have prompted a rapid increase in the application of magnesium alloys in the fields of automobiles, rail transit, and aerospace. Magnesium alloys have also become the third largest metal engineering materials after steel and aluminum alloys. Extruded magnesium alloys can provide plates, rods, tubes, wires, and profile products in various sizes, which can be processed through alloying, heat treatment, and extrusion processes. and other means to comprehensively regulate the structure of the material, and then control its performance to meet the requirements of diversified structura...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C23/02C22C1/03C22F1/06
CPCC22C1/03C22C23/00C22C23/02C22F1/06
Inventor 孟帅举余晖郭家美闻晶晶范少达李永胜赵维民
Owner 天津河北工业大学资产经营有限责任公司
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