Magnesium alloy sheet with high toughness at low temperature

A high-toughness, magnesium alloy technology, applied in the field of metal materials, can solve the problems of complex manufacturing methods, easy grain growth, narrow processing window, etc., to achieve elimination of anisotropy, change of lattice parameters, and good ductility at room temperature Effect

Inactive Publication Date: 2013-04-24
YANSHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Nevertheless, there are still few varieties of wrought magnesium alloys, and the room temperature properties of developed alloys are still not excellent enough. These shortcomings seriously restrict the further expansion of magnesium alloys in the field of metal structural materials (F.Czerwinski, Bolton, 2007)
For example, Zhou Hong (200810050218.2) provided a composition and manufacturing method of a wrought magnesium alloy containing Mg, Ce, Y, Gd and Sr, although the composition of this magnesium alloy element can provide a wrought magnesium alloy with high strength, but Its toughness at low temperature is low, and the manufacture of this magnesium alloy requires repeated high-temperature rolling, and the grains are easy to grow; Xu Chunjie et al. (200510124529) invented a magnesium alloy containing Mg, Zn, Y, Ce and a small amount of other rare earths. High-strength and super-tough magnesium alloys, first in situ synthesis of quasi-crystalline magnesium alloy ingots, and then rapid solidification magnesium alloy sheets prepared by rapid solidification single-roll comb flow, and finally repeated extrusion
Although this method can obtain high-strength and tough magnesium alloys, the manufacturing method is very complicated, it is difficult to implement, and the size is obviously limited.
(200980103131.X) invented a magnesium alloy plate. The alloy mainly contains Mg, Al, Zn and Mn. Although it can improve the plasticity of the magnesium alloy, the processing temperature is high and the processing technology is very complicated. The processing window Narrow and easy to oxidize

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  • Magnesium alloy sheet with high toughness at low temperature
  • Magnesium alloy sheet with high toughness at low temperature
  • Magnesium alloy sheet with high toughness at low temperature

Examples

Experimental program
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Embodiment 1

[0021] Take 4.965kg of Mg ingot with a purity of 99.5%, 10g of a Ca ingot with a purity of 99.8%, and 25g of a Bi ingot with a purity of 99.8%. Then metal Mg ingots, Ca ingots and Bi ingots were added into the automatic temperature control resistance furnace in sequence, the melting temperature was 720 ° C, and 1% SF was used. 6 Mixed gas with argon for protection, each time a raw material is added, stir for 10 minutes; after all the raw materials are added, melt for another 30 minutes, and keep stirring to make it melt evenly. Solution treatment at 450°C for 10 hours after smelting.

[0022] At room temperature, the alloy after solid solution is rolled into a thin plate by asynchronous rolling method, wherein the speed difference between the upper and lower rolls is 0.05m / s, and the rolling speed is 1m / s. After each rolling, the alloy is turned upside down, Then the alloy is rotated 180° and rolled continuously to prepare a 0.32mm Mg-0.2Ca-0.5Bi alloy sheet. After grinding ...

Embodiment 2

[0024] Take 4.935kg of Mg ingots with a purity of 99.5%, 25g of Ba ingots with a purity of 99.8%, 20g each of Pb ingots and Gd ingots with a purity of 99.9%, first remove the oxide skin on the surface of the above metal ingots, and then put the above prepared ingots at 200°C Fully preheat, and then put metal Mg ingots, Ba ingots, Pb ingots and Gd ingots into the automatic control resistance furnace in sequence, using 1%SF 6 Mixed gas with argon for protection, each time a raw material is added, stir for 10 minutes. The smelting temperature is 750°C. After all the raw materials are added, smelt for 30 minutes and keep stirring to make it smelt evenly. Solution treatment at 480°C for 10 hours after smelting.

[0025] At room temperature, the alloy after solid solution is rolled into a thin plate by asynchronous rolling method, wherein the speed difference between the upper and lower rolls is 0.5m / s, and the rolling speed is 5m / s. After each rolling, the alloy is turned upside d...

Embodiment 3

[0027] Take 4.935kg of Mg ingots with a purity of 99.5%, 25g of Sn ingots with a purity of 99.8%, 20g each of Sm and Gd ingots with a purity of 99.9%, first remove the oxide skin on the surface of the above metal ingots, and then place the above prepared ingots at 200°C Fully preheat, and then add metal Mg ingots, Sm ingots, Gd ingots and Sn ingots in sequence into the automatic temperature control resistance furnace, using 1% SF 6 Mixed gas with argon for protection, each time a raw material is added, stir for 10 minutes. The smelting temperature is 720°C. After all the raw materials are added, smelt for another 30 minutes and keep stirring to make it smelt evenly. Solution treatment at 320°C for 10 hours after smelting.

[0028] The alloy after solid solution is rolled into thin plate by asynchronous rolling method at room temperature. Among them, the speed difference between the upper and lower rolls is 0.25m / s, and the rolling speed is 2.5m / s. After each rolling, the all...

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Abstract

The invention relates to a magnesium alloy sheet with high toughness at a low temperature. The magnesium alloy sheet comprises the following chemical components: Mg, xM and yN, wherein x and y represent mass percent; x is greater than or equal to 0.2% and less than or equal to 0.5%; y is greater than or equal to 0.5% and less than or equal to 0.8%; M contains barium, calcium and manganese; N contains one or two of lead, bismuth, indium and rare earth elements; when the N contains the two elements, the content of the two elements are equal; and the rare earth elements mainly include samarium, gadolinium and lutetium. After an alloy ingot is smelted, the alloy ingot on which a solid solution treatment is carried out is rolled to form the alloy sheet at the room temperature by utilizing an asynchronous rolling method. The alloy sheet manufactured by utilizing the method is small in crystallite dimension, good in ductility and low in anisotropy. The ductility of the alloy sheet at the room temperature reaches 15% to 25%.

Description

technical field [0001] The invention belongs to the technical field of metal materials, in particular to a magnesium alloy plate. Background technique [0002] Magnesium alloy has the advantages of light specific gravity, high specific strength and specific stiffness, good damping and machinability, good thermal conductivity, strong electromagnetic shielding ability, good vibration damping performance and easy recycling, which meets the weight reduction requirements of aviation, aerospace and modern automobile industries. , energy-saving requirements, known as "21st century green engineering materials". [0003] In recent years, as the development and application of wrought magnesium alloys have received more and more attention, the problems found in the application of magnesium alloys have increased, one of which is the poor deformation performance of magnesium alloys at room temperature. Metal magnesium belongs to the close-packed hexagonal crystal structure, and its slip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00C22C23/06
Inventor 彭秋明蔡康乐马宁李慧房大庆
Owner YANSHAN UNIV
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