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A method for determining the shape and size of the blank for the production of a wide sheet of magnesium alloy cast-rolled sheet

A certain method, magnesium alloy technology, applied in the direction of sheets/plates, building components, etc., can solve the problems of high production cost, high cost, plate width limitation (generally below 600mm, etc.), to improve the yield and reduce the edge The effect of split ratio

Active Publication Date: 2018-03-27
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The cast-rolling method is a low-cost magnesium alloy plate production process, but the product quality is not as good as the rolling method, and it is very difficult to realize the casting-rolling production of wide-width plates (the width is generally below 650mm); the extrusion blanking method is mainly used to produce thin plates , but the width of the plate is limited (generally below 600mm); the ingot hot rolling billet method is a traditional magnesium alloy plate production method, which can produce magnesium alloy wide sheets, but this method has low yield and high production cost
The specifications of magnesium alloy sheets used in the field of transportation are generally 1.5-3.0mm in thickness, >1600mm in width, and >4000mm in length, which are limited by the insufficient width of cast-rolled and extruded plates and the low yield and cost of casting and hot-rolled billets. For reasons such as too high, the current magnesium alloy plate has not yet been applied on a large scale in this field

Method used

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  • A method for determining the shape and size of the blank for the production of a wide sheet of magnesium alloy cast-rolled sheet
  • A method for determining the shape and size of the blank for the production of a wide sheet of magnesium alloy cast-rolled sheet
  • A method for determining the shape and size of the blank for the production of a wide sheet of magnesium alloy cast-rolled sheet

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Embodiment 1

[0066] The rolling product type is selected as AZ31, the width of the incoming material is 600mm, the thickness of the incoming material is 6.0mm, the thickness of the magnesium alloy wide sheet product is 1.5mm, and the width l is 1600mm.

[0067] like Figure 1~2 As shown, the cross-sectional shape of the wide sheet rolling billet includes a middle thin area, and thick areas are set on both sides of the middle thin area. The thick area and the middle thin area are connected by a transition area. area decreases continuously. In the first embodiment, the transition connection mode of the transition zone is a circular arc transition connection.

[0068] The shape and size of the rolled billet are determined by the following steps:

[0069] The reduction rate ε of the middle thin area of ​​the billet in this embodiment b is 15%, then the thickness of the middle thin area after rolling is: h b =5.1mm; thick area reduction ε h Take 10%, then the thickness of the thick zone af...

Embodiment 2

[0084] The rolling product type is selected as AZ31, the width of the incoming material is 1000mm, the thickness of the incoming material is 8.0mm, the thickness of the magnesium alloy wide sheet product is 1.0mm, and the width is 2000mm.

[0085] like Figure 2~3 As shown, the cross-sectional shape of the wide sheet rolling billet includes a middle thin area, and thick areas are set on both sides of the middle thin area. The thick area and the middle thin area are connected by a transition area. area decreases continuously. The transition connection mode of the transition zone in the second embodiment is a straight line transition connection.

[0086] The shape and size of the rolled billet are determined by the following steps:

[0087] The reduction rate ε of the middle thin area of ​​the billet in the second embodiment b is 10%, then the thickness of the middle thin area after rolling is: h b =7.2mm; thick zone reduction ε h Taking 7.5%, the thickness of the thick zon...

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Abstract

The invention discloses a determining method for the shape and the size of a wide sheet blank prepared through a magnesium alloy cast rolled plate and belongs to the technical field of magnesium alloy wide sheet rolling. The determining method is characterized in that the cross section of the wide sheet rolled blank comprises a middle thin area; thick areas are arranged on the two sides of the middle thin area; the thick areas are connected with the middle thin area through transition areas, the thickness of the parts, in the transition areas, of the blank is continuously reduced from the thick areas to the middle thin area; and the transition connecting manner of the transition areas is an arc transition connecting manner or a line transition connecting manner. According to the determining method, the overall dimensions of the magnesium alloy wide sheet blank are determined and include that the thickness of the middle thin area ranges from 1.0mm to 3.0 mm, and the width of the blank ranges from 1200 mm to 2000 mm. According to the subsequent rolling technology of the magnesium alloy wide sheet, the good blank is provided, the phenomenon of edge cracking after rolling is avoided, and the rolling yield of the magnesium alloy wide sheet is increased.

Description

technical field [0001] The invention belongs to the technical field of direct rolling magnesium alloy wide thin plate blanks from magnesium alloy cast rolling plates or cast coils, in particular to a method for determining the shape and size of blanks for preparing wide width thin plates from magnesium alloy cast rolling plates. Background technique [0002] Magnesium alloy is currently the lightest metal structural material in engineering applications, and has become an important material in industrial fields such as national defense, aerospace, automobiles, and electronic communications. With the start of large-scale engineering projects such as high-speed rail transit and electric vehicles in my country, higher requirements are put forward for large-scale magnesium alloy products. [0003] From the thickness point of view, the magnesium alloy wide sheet can be divided into thick plate and thin plate according to the conventional metal plate. The thickness is not less than...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16S1/06
CPCF16S1/06
Inventor 刘光明胡啸周研黄庆学马立峰周存龙
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY