Wide and flat or semicontinuous wide and flat magnesium alloy ingot blank molding method

A sheet forming, semi-continuous technology, applied in the high-strength magnesium alloy forging forming process, can produce large-scale fields, can solve the problems of low room temperature plasticity, poor forming ability, small size of hot-rolled sheets, etc., achieve low energy consumption and improve utilization rate effect

Inactive Publication Date: 2014-01-15
江苏诚德钢管股份有限公司
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Problems solved by technology

However, due to the close-packed hexagonal structure of magnesium alloys, the plasticity at room temperature is low and the forming ability is poor, which greatly limits the application of magnesium alloys.
At present, the production of wrought magnesium alloy plates mainly focuses on hot-rolled deformation, but the size of hot-rolled plates is small and the overall performance is poor, which greatly limits the promotion and application of large-scale high-strength wrought magnesium alloys.

Method used

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  • Wide and flat or semicontinuous wide and flat magnesium alloy ingot blank molding method

Examples

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Embodiment Construction

[0013] The following is an example to illustrate the production of magnesium alloy plates with product specifications of 28mm×1800mm×2100mm combined with the brand AZ31B.

[0014] 1. Ingot preparation: remove the oxide skin on the surface of wide flat magnesium alloy ingots with length, width and height of 260mm, 740mm and 1800mm, and then blunt the corners of the ingot.

[0015] 2. Homogenization treatment: place the billet at a temperature of 390°C for 20 hours.

[0016] 3. Billet heating: heat the billet to a surface temperature of 430°C, and hold for 4 hours.

[0017] 4. Forging:

[0018] A forging anvil with a continuous length and limited width with a groove is used. The groove is provided with a draft angle of 5-15°, and the size and shape of the hammerhead match the forging anvil.

[0019] Put the workpiece in the forging anvil, and under the action of the hammer head, forging is carried out in a step-by-step, multi-pass forging method. The forging ratio is not less ...

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Abstract

The invention discloses a panel molding method of a wide and flat or semicontinuous wide and flat magnesium alloy ingot blank, relating to a forging and molding process capable of producing high-intensity magnesium alloy with large specifications. The panel molding method comprises the following steps of: removing surface scale of the wide and flat or semicontinuous wide and flat magnesium alloy ingot blank, performing inverted blunting to sides and corners of the ingot blank, and then sequentially performing homogenizing annealing, heating restraining forging, heat treatment and surface machining. The production and processing of a large-specification magnesium alloy panel with width more than 2000mm, length more than 2000mm and thickness between 25mm to 80mm can be realized. The yield strength of a product is not less than 350MPa, the tensile strength is not less than 400MPa and the coefficient of elongation is not less than 12%. The forging production efficiency can be increased by more than 2 times compared with the efficiency of a common forging method. According to the method, produced burr scraps are less, so that the material utilization rate can be greatly improved.

Description

technical field [0001] The invention relates to a magnesium alloy manufacturing process, in particular to a forging forming process capable of producing large-scale and high-strength magnesium alloys. Background technique [0002] Magnesium alloy has the advantages of low density, high specific strength and specific stiffness, good damping and shock absorption performance, excellent machining performance, and easy recycling. It has great application prospects in aerospace, transportation, 3C and other industries, and is known as "" Metallic Materials for the 21st Century". However, due to the close-packed hexagonal structure of magnesium alloys, the plasticity at room temperature is low and the forming ability is poor, which greatly limits the application of magnesium alloys. At present, the production of wrought magnesium alloy plates is mainly focused on hot-rolled deformation, but the size of hot-rolled plates is small and the overall performance is poor, which greatly l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/06B21C37/02
Inventor 张铮陈忠徐国荣谭明于超王鹏展权高峰王林林
Owner 江苏诚德钢管股份有限公司
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