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Novel high-strength plastic magnesium alloy plate and preparation process thereof

A preparation process and technology for magnesium alloys, which are applied in metal rolling, manufacturing tools, metal rolling, etc., can solve the problems of increased production cost of new metal, increased material use cost, limited popularization and application, etc., and can solve the phenomenon of center segregation. , the effect of increasing strength and reducing mobility

Active Publication Date: 2022-01-21
CRRC CHANGCHUN RAILWAY VEHICLES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For some smelters, the secondary recovery of metals is one of the important raw materials for the preparation of new metals, but complex and diverse heterogeneous metals need to spend a lot of energy to separate them during the pre-treatment process of raw materials, resulting in The increase in the production cost of preparing new metals leads to an increase in the cost of materials, which also limits the application of this new material in practical engineering.

Method used

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  • Novel high-strength plastic magnesium alloy plate and preparation process thereof
  • Novel high-strength plastic magnesium alloy plate and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation process for a novel high-strength plastic magnesium alloy sheet comprises the following steps:

[0029] (1) Alloy Mg-2Al-0.5Zn-0.3Sn-0.7Ca (wt.%) was prepared by twin-roll casting and rolling, the roll temperature was 100°C, the runner was 500°C, the roll speed was 350rad / h, and the roll gap was 4mm;

[0030] (2) Solid solution the cast-rolled plate at 350°C, 420°C and 500°C for 2 hours respectively;

[0031] (3) Put the two plates after solid solution in an incubator at 325°C for 5 minutes, and then send them to the asynchronous rolling mill respectively. The roll speed ratio of the upper roll and the lower roll is 1.5, and the roll temperature is 100°C. 25%, one of the plates is rolled for 1 pass, and the other is rolled for 3 passes;

[0032] (4) After polishing the contact surfaces of the two asynchronously rolled plates with an angle grinder, wash them with acetone solution, and finally put them into absolute ethanol for ultrasonic cleaning and dryin...

Embodiment 2

[0039] (1) Alloy Mg-1.5Al-0.7Zn-0.1Sn-0.3Ca (wt.%) was prepared by twin-roll casting and rolling, the roll temperature was 80°C, the runner was 480°C, the roll speed was 360rad / h, and the roll gap was 4mm;

[0040] (2) Solid solution the cast-rolled plate at 320°C, 420°C and 510°C for 2 hours respectively;

[0041] (3) Put the two plates after solid solution in an incubator at 275°C for 8 minutes, and then send them to the asynchronous rolling mill respectively. The roll speed ratio of the upper roll and the lower roll is 1.3, and the roll temperature is 80°C. Amount of 20%, one of the plates is rolled for 1 pass, and the other is rolled for 3 passes;

[0042] (4) After polishing the contact surfaces of the two asynchronously rolled plates with an angle grinder, wash them with acetone solution, and finally put them into absolute ethanol for ultrasonic cleaning and drying;

[0043](5) Fit the upper and lower surfaces of two asynchronously rolled plates closely together and fix...

Embodiment 3

[0049] (1) Alloy Mg-2.5Al-0.3Zn-0.5Sn-0.5Ca (wt.%) was prepared by twin-roll casting and rolling, the roll temperature was 120°C, the runner was 550°C, the roll speed was 370rad / h, and the roll gap was 4mm;

[0050] (2) Solid solution the cast-rolled plate at 350°C, 420°C and 500°C for 2 hours respectively;

[0051] (3) Put the two plates after solid solution in an incubator at 250°C for 10 minutes, and then send them to the asynchronous rolling mill respectively. The roll speed ratio of the upper roll and the lower roll is 1.7, and the roll temperature is 120°C. 21%, one of the plates is rolled for 2 passes, and the other is rolled for 3 passes;

[0052] (4) After polishing the contact surfaces of the two asynchronously rolled plates with an angle grinder, wash them with acetone solution, and finally put them into absolute ethanol for ultrasonic cleaning and drying;

[0053] (5) The upper surface and the lower surface of two asynchronously rolled plates are respectively fixe...

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Abstract

The invention provides a novel high-strength plastic magnesium alloy plate. On the basis of a traditional AT-series magnesium alloy, Zn and Ca elements are added at the same time, the grain boundary energy is further reduced through the separation eutectic of Zn and Ca at the grain boundary, the pinning effect of the grain boundary is induced, the mobility of the grain boundary is reduced, growth of grains is restrained, and therefore the grains are further refined, the strength of the magnesium alloy is improved, the texture of the AT-series magnesium alloy is weakened, and the forming performance of the alloy is improved. The magnesium alloy plate subjected to double-roller cast rolling is subjected to asynchronous rolling, and different deformation amounts are generated on the upper surface and the lower surface of the magnesium alloy plate through the difference of the roller speed. Finally, through accumulated stack rolling, through the difference of the grain size and the microstructure of the plate, asymmetric deformation is generated in the rolling process, a lamellar structure is formed, and the center segregation phenomenon of the cast rolling plate and the separation and recycling problem generated after a heterogeneous composite plate is used are solved.

Description

technical field [0001] The invention belongs to the technical field of high-strength alloy material manufacturing, and in particular relates to a high-strength plastic magnesium alloy plate and a preparation process. Background technique [0002] Magnesium alloys have great application prospects in the field of lightweight materials due to their low density, good plasticity and toughness, and high specific strength. However, compared with steel and aluminum, which have a wider application range, its own absolute strength is low, its room temperature formability is poor, and its production cost is high, which also limits its use in certain engineering fields. For metal materials, strength and plasticity are two properties in opposite directions, and it is often impossible to improve both at the same time. In the traditional AT series magnesium alloy, the addition of Sn element will produce Mg with higher melting point 2 Sn phase, this phase has a high melting point and ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/38B21B3/00B21B47/00B21C37/02
CPCB21B1/38B21B3/00B21B47/00B21C37/02B21B2001/386
Inventor 邓海刘丰宁李志刚王超任延静张艳杰
Owner CRRC CHANGCHUN RAILWAY VEHICLES CO LTD
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