Preparation method of wrought magnesium alloy sheet with mixcrystal structure and non-basal plane texture

A technology for deforming magnesium alloys and plates, applied in the field of sheet metal rolling, can solve the problem of no obvious improvement in room temperature formability, and achieve the effect of improving room temperature forming properties, achieving strength properties, plastic properties and room temperature forming properties.

Active Publication Date: 2020-06-12
CHONGQING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the liner rolling process based on the concept of severe plastic deformation has been able to prepare deformed magnesium alloy sheets with mixed crystal structure, achieving a significant increase in the strength of the sheet (yield strength ~221MPa) and plasticity (fracture elongation rate~26%), but the prepared sheet is still basal texture, therefore, the room temperature formability of the sheet is not significantly improved compared with the general basal texture deformed magnesium alloy sheet

Method used

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  • Preparation method of wrought magnesium alloy sheet with mixcrystal structure and non-basal plane texture
  • Preparation method of wrought magnesium alloy sheet with mixcrystal structure and non-basal plane texture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment one, see figure 1 , shows a method for preparing a deformed magnesium alloy sheet having a mixed crystal structure and a non-basal texture, which includes the following steps:

[0028] S1, preheating treatment of AZ31 magnesium alloy sheet, wrap 1.5mm thick commercial hot-rolled AZ31 magnesium alloy sheet with tin foil paper to prevent high temperature oxidation, heat it to 550°C in a heating furnace, and the heating rate is 10~15°C / min After heating to the predetermined temperature, continue to keep warm for 10 minutes. The preheated AZ31 magnesium alloy sheet was quickly transferred to the front of the rolling mill for ECAR-CB deformation. The reduction in each pass was 15%, and the speed of the upper and lower rolls was 30m / min. Then, under the action of rolling friction, the AZ31 magnesium alloy sheet is continuously passed through a multi-step die with equal rolling channel height and continuous bending for shearing and continuous multi-pass bending to ...

Embodiment 2

[0035] Embodiment 2, a method for preparing a wrought magnesium alloy sheet having both a mixed crystal structure and a non-basal texture, comprising the following steps:

[0036] S1, preheating treatment of AM60 magnesium alloy sheet, wrap the 2.4mm thick commercial hot-rolled AM60 magnesium alloy sheet with tin foil to prevent high temperature oxidation, heat it to 520°C in a heating furnace, and the heating rate is 10~15°C / min After heating to the predetermined temperature, continue to keep warm for 15 minutes. The preheated AM60 magnesium alloy sheet was quickly transferred to the front of the rolling mill for ECAR-CB deformation. The pass reduction was 10%, and the speed of the upper and lower rolls was 35m / min. Then, under the action of rolling friction, the AM60 magnesium alloy sheet is continuously passed through a multi-step die with equal rolling channel height and continuous bending for shearing and continuous multi-pass bending to achieve compound deformation. Sub...

Embodiment 3

[0045] Embodiment 3, a method for preparing a wrought magnesium alloy sheet having both a mixed crystal structure and a non-basal texture, comprising the following steps:

[0046] S1, preheating treatment of ZK40 magnesium alloy sheet, wrap commercial hot-rolled ZK40 magnesium alloy sheet with thickness of 3.0 mm in tin foil to prevent high temperature oxidation, heat it to 540°C in a heating furnace, and the heating rate is 10~15°C / min After heating to the predetermined temperature, continue to keep warm for 15 minutes. The preheated ZK40 magnesium alloy sheet is quickly transferred to the front of the rolling mill for ECAR-CB deformation. The pass reduction is 12%, and the speed of the upper and lower rolls is 45m / min. Then, under the action of rolling friction, the ZK40 magnesium alloy sheet is continuously passed through a multi-step die with equal rolling channel height and continuous bending for shearing and continuous multi-pass bending to achieve composite deformation....

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Abstract

The invention discloses a preparation method of a wrought magnesium alloy sheet with a mixcrystal structure and a non-basal plane texture. The preparation method comprises the following steps of S1, conducting hot rolling, shearing and continuous bending on the wrought magnesium alloy sheet at the rolling pass reduction of 10-15%, and then conducting quenching; S2, cutting the quenched smooth sheet, reheating the quenched smooth sheet to the rolling temperature, turning over the wrought magnesium alloy sheet by 180 degrees to exchange the upper surface and the lower surface, conducting hot rolling, shearing and continuous bending on the wrought magnesium alloy sheet at the rolling pass reduction of 10-15%, and then conducting quenching; S3, repeating the step S2 until the accumulated reduction of the wrought magnesium alloy sheet is not less than 40%; S4, conducting recrystallization annealing at the annealing temperature of 300-450 DEG C and the heat preservation time of 1-8 min, andthen conducting quenching; and S5, conducting recovery annealing at the annealing temperature of 100-220 DEG C and the heat preservation time of 60-600 min. Through the preparation method, intercoordination of the mixcrystal structure and the non-basal plane texture can be realized in the wrought magnesium alloy sheet, and accordingly, intercoordination of the strength property, the plasticity property and the indoor-temperature forming property of the wrought magnesium alloy sheet can be realized.

Description

technical field [0001] The invention relates to the technical field of metal plate rolling, in particular to a method for preparing a magnesium alloy plate with mixed crystal structure and non-basal surface texture. Background technique [0002] The deformed magnesium alloy sheet has limited independent slip system at room temperature due to its hexagonal close-packed crystal structure, which makes the plastic deformation ability of the deformed magnesium alloy sheet poor at room temperature. In addition, wrought magnesium alloy sheets tend to form a strong basal texture during processing and preparation, which leads to difficulties in subsequent forming and processing, which restricts its large-scale application. Realizing the weak / non-basal texture of deformed magnesium alloy sheet through texture regulation is an important means to improve its deformation ability at room temperature. [0003] At present, extensive research has been carried out on special processing techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/06B21C37/02
CPCB21C37/02C22F1/06
Inventor 胡励时来鑫周涛陈家明陈强吕胡缘陈雨杨明波
Owner CHONGQING UNIV OF TECH
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