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Low-cost rapid-corrosion magnesium alloy and preparation method thereof

A rapid corrosion, magnesium alloy technology, applied in the field of metal materials and processing, can solve the problems of long degradation time and high cost of magnesium alloy materials, and achieve the effects of improving ignition point, high processing rate and improving strength

Active Publication Date: 2020-05-19
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the technical problems of high cost and long degradation time of current magnesium alloy materials, and provides a low-cost rapid corrosion magnesium alloy and its preparation method

Method used

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  • Low-cost rapid-corrosion magnesium alloy and preparation method thereof

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preparation example Construction

[0018] The second aspect of the present invention provides a method for preparing a low-cost rapid corrosion magnesium alloy, comprising the following steps: weighing pure magnesium ingots, pure aluminum ingots, Mg-Ca master alloys, Mg-Zn master alloys, and Mg-Cu master alloys; Introduce protective gas and smelt, pour into ingot; homogenize the ingot, cut into billets of corresponding size and peel; hot extrude into rods; the hot extrusion conditions are: extrusion temperature 350 -400°C, extrusion ratio of 4-10, extrusion speed of 10-20m / min; preferred extrusion temperature of 350°C. The method of the invention has small extrusion ratio, high extrusion speed, and reduces equipment loss.

[0019] Further, the hot extrusion conditions are: an extrusion temperature of 350° C., an extrusion ratio of 8, and an extrusion speed of 20 m / min. The solubility and tensile strength of the rapidly corroded magnesium alloy prepared under the hot extrusion conditions are , Elongation and ot...

Embodiment 1

[0024] Example 1 A low-cost rapid corrosion magnesium alloy

[0025] Described low-cost rapid corrosion magnesium alloy is Mg-Al-Ca-Zn-Cu-Fe magnesium alloy, is made up of the element of following mass percent: Al 13.00wt%, Zn 9.0wt%, Ca 0.4wt%, Cu 2.0wt% , Fe3.0wt%, and the rest are Mg and unavoidable impurity elements. Raw materials are weighed according to the ratio, and the above-mentioned raw materials are pure magnesium ingots, pure aluminum ingots, Mg-25%Ca master alloys, and Mg-30%Cu master alloys; 2 +SF 6 Under the protective condition of mixed gas (volume ratio: 300:1), melt at 720°C, hold for 60 minutes, stir for 10 minutes, and refine for 20 minutes.

[0026] The ingot of Example 1 was subjected to homogenization treatment at 520° C. for 2 hours, the cooling method was air cooling, and then cut into corresponding billets and peeled. The blank obtained in the previous step is extruded into a rod through an extruder at an extrusion temperature of 350°C, an extrusi...

Embodiment 2

[0027] Embodiment 2 A kind of low-cost rapid corrosion magnesium alloy

[0028] The low-cost rapid-corrosion magnesium alloy is a Mg-Al-Ca-Zn-Cu-Fe magnesium alloy, which consists of the following elements by mass percentage: Al 25.00wt%, Zn 2.0wt%, Ca 0.2wt%, Cu 3.0wt% , Fe 1.5wt%, and weigh the raw materials according to the proportion. The above-mentioned raw materials are pure magnesium ingots, pure aluminum ingots, Mg-25%Ca master alloys, Mg-10%Zn master alloys, and Mg-30%Cu master alloys; 2 +SF 6 Under the protective condition of mixed gas (volume ratio: 400:1), melt at 740°C, keep warm for 40min, stir for 5min, and refine for 30min. The billet obtained in the previous step was extruded into a rod through an extruder at an extrusion temperature of 400 °C, an extrusion ratio of 8, and an extrusion speed of 20 m / min.

[0029]The ingot of Example 2 was subjected to homogenization treatment at 500°C for 2 hours, the cooling method was air cooling, and then cut into corresp...

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Abstract

The invention discloses a low-cost rapid-corrosion magnesium alloy and a preparation method thereof. The alloy comprises the following elements of, by mass, 3.0wt%-25wt% of Al, 0.20wt%-1.0wt% of Ca, 2.0wt%-15wt% of Zn, 1.20wt%-3.0wt% of Cu, 1.50wt%-5.0wt% of Fe and the balance Mg and other impurity elements. According to the low-cost rapid-corrosion magnesium alloy and the preparation method thereof, a Mg-Al-Ca-Zn-Cu-Fe alloy is adopted, the grain size of a cast ingot is refined through the Ca, then the segregation of the cast ingot is reduced, the Cu and the Fe in the material are uniformly distributed, fine dispersed Mg2Cu and Mg2Fe are formed, and the purpose of rapid corrosion dissolution is achieved; meanwhile, the basal texture of the magnesium alloy is weakened, so that the elongation of the material is improved; and in addition, the Ca has flame-retardant and anti-oxidation effects, so that the ignition point of the alloy is improved, and therefore, the using amount of protective gas is reduced in the smelting process, and no gas protection is required during the homogenization process.

Description

technical field [0001] The invention belongs to the technical field of metal materials and processing, in particular to a low-cost rapid corrosion magnesium alloy and its preparation method and application. Background technique [0002] The development of science and technology has promoted the continuous improvement of the global industrial automation level, which has led to a further increase in the demand for energy. Shale oil and gas, as one of the important directions for the development of the energy field at present and in the future, has high economic value, and the related exploitation technology has been successful in the United States and gradually spread to the world. According to relevant statistics, my country's shale gas reserves rank first in the world, and shale oil reserves rank third in the world, with broad prospects for future development. However, the relevant mining technology is still in the initial price range, and the current mainstream technology ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/02C22C23/04C22C23/00C22C1/03C22F1/06
CPCC22C23/02C22C23/04C22C23/00C22C1/03C22F1/06
Inventor 刘宝胜董舸航张跃忠任晓霞柴跃生卫英慧
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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