Weak-basal-texture high-strength magnesium-lithium alloy and preparation method thereof

A magnesium-lithium alloy, high-strength technology, applied in the direction of manufacturing tools, heat treatment equipment, furnace types, etc., can solve the problems of increasing the cost of magnesium-lithium alloys, unfavorable industrial applications of magnesium-lithium alloys, etc., to improve the secondary processing performance and elongation. The effect of increasing and reducing costs

Active Publication Date: 2022-04-05
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the solid solution of rare earth elements into the magnesium matrix can improve the strength of magnesium-lithium alloys through solid solution strengthening, but rare earth elements will increase the cost of magnesium-lithium alloys, which is not conducive to the industrial application of magnesium-lithium alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A high-strength magnesium-lithium alloy with weak basal plane texture in this embodiment, its composition mass percentage is: Li: 4%, Ca: 0.3%, Ce: 0.2%, Y: 0.2%, and the total amount of impurity elements is less than or equal to 0.2%, the balance is Mg. The raw materials are industrial pure magnesium ingots, industrial pure lithium ingots, magnesium-calcium master alloys, magnesium-cerium master alloys and magnesium-yttrium master alloys.

[0020] A method for preparing a high-strength magnesium-lithium alloy with a weak basal texture in this embodiment includes the following steps:

[0021] Step 1. Before smelting, use alcohol to decontaminate and scrub the surface of each metal ingot. After scrubbing, preheat the raw materials except lithium. The preheating temperature is 200°C to remove the moisture in each metal ingot.

[0022] Step 2: preheat and dry the titanium crucible, the preheating and drying temperature is 300°C, and the preheating and drying time is 2 hou...

Embodiment 2

[0027] A high-strength magnesium-lithium alloy with weak basal plane texture in this embodiment, its composition mass percentage is: Li: 5%, Ca: 0.6%, Ce: 0.1%, Y: 0.1%, and the total amount of impurity elements is less than or equal to 0.2%, the balance is Mg. The raw materials are industrial pure magnesium ingots, industrial pure lithium ingots, magnesium-calcium master alloys, magnesium-cerium master alloys and magnesium-yttrium master alloys.

[0028] This embodiment provides a method for preparing a high-strength magnesium-lithium alloy with a weak base surface texture, wherein: the rolling temperature is selected as 350°C, and the homogenized sample is placed in a holding furnace and kept at a temperature of 350°C 30min, the deformation between rolling passes is 10%, in order to ensure the uniform rolling temperature of the alloy, intermediate annealing is carried out between each pass, and it is returned to the furnace at 350°C for 10 minutes. The total number of rolli...

Embodiment 3

[0031] A high-strength magnesium-lithium alloy with weak basal plane texture in this embodiment, its composition mass percentage is: Li: 2%, Ca: 0.5%, Ce: 0.1%, Y: 0.1%, and the total amount of impurity elements is less than or equal to 0.2%, the balance is Mg. The raw materials are industrial pure magnesium ingots, industrial pure lithium ingots, magnesium-calcium master alloys, magnesium-cerium master alloys and magnesium-yttrium master alloys.

[0032] This embodiment provides a method for preparing a high-strength magnesium-lithium alloy with a weak base surface texture, wherein: the rolling temperature is selected as 350°C, and the homogenized sample is placed in a holding furnace and kept at a temperature of 350°C 30min, the deformation between rolling passes is 10%, in order to ensure the uniform rolling temperature of the alloy, intermediate annealing is carried out between each pass, and it is returned to the furnace at 350°C for 10 minutes. The total number of rolli...

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Abstract

The invention discloses a weak-basal-texture high-strength magnesium-lithium alloy and a preparation method thereof. The weak-basal-texture high-strength magnesium-lithium alloy is prepared from the following components in percentage by mass: 1-5% of Li, 0.3-0.6% of Ca, 0.1-0.2% of Ce, 0.1-0.2% of Y, less than or equal to 0.2% of total impurity elements and the balance of Mg. Through alloying, rolling and heat treatment, the strength of the magnesium-lithium alloy can be improved while the basal texture of the magnesium-lithium alloy is weakened.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a high-strength magnesium-lithium alloy with weak base surface texture and a preparation method thereof. Background technique [0002] Magnesium alloy has the advantages of low density, high specific strength, good damping and shock resistance, etc. It has a very wide application prospect in the fields of automobile, national defense, aerospace, electronics and other industries, and is known as "the green engineering material of the 21st century". By adding Li to magnesium alloys for alloying, its density can be further reduced. Therefore, magnesium-lithium alloys have a wide range of potential applications in aerospace and other fields that require high weight reduction. However, since the critical shear stress of magnesium-lithium alloy basal slip is much smaller than that of non-basal slip, it is easy to form a strong basal texture during rolling deformation, resulting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00C22C1/02C22F1/06C21D9/00
Inventor 翁康荣范宇恒董祥雷郭春文李永刚李婧婷赵红亮
Owner ZHENGZHOU UNIV
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