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Process method for preparing wide sheet from magnesium alloy cast-rolled sheet

A process method and magnesium alloy technology are applied in the field of direct rolling of magnesium alloy cast-rolled sheets or cast-rolled coils to wide sheets, and can solve problems such as edge cracking of magnesium alloy wide sheets

Active Publication Date: 2018-06-26
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to develop a process for preparing wide-width thin plates from magnesium alloy cast-rolled plates. At the beginning of direct preparation of magnesium alloy wide-width thin plates from cast-rolled plates or cast-rolled coils, that is, through shaping and rolling processes, rolling into the middle of rolled plate blanks Thin, thick "dog bone" billet on both sides solves the problem of edge cracking when rolling magnesium alloy wide sheet

Method used

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  • Process method for preparing wide sheet from magnesium alloy cast-rolled sheet
  • Process method for preparing wide sheet from magnesium alloy cast-rolled sheet
  • Process method for preparing wide sheet from magnesium alloy cast-rolled sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107] The selected rolled product type is AZ31, the incoming material width is 600mm, the incoming material thickness is 6.0mm, the thickness of the magnesium alloy wide sheet product is 1.5mm, and the width l is 1600mm.

[0108] Such as Figure 1~2 As shown, the process method for preparing a wide sheet of magnesium alloy cast-rolled sheet is characterized in that the rolling process of the magnesium alloy wide sheet includes the following steps:

[0109] (1) Determination of the shape and size of the billet for rolling of the wide sheet. The cross section of the billet for the rolling of the wide sheet includes the middle thin zone. Thick zones are set on both sides of the middle thin zone. The thick zone and the middle thin zone are connected by a transition zone. The thickness of the blank in the transition zone continuously decreases from the thick zone to the middle thin zone.

[0110] The reduction rate ε of the middle thin zone of the blank in this example b 15%, the thickne...

Embodiment 2

[0133] The selected rolled product type is AZ31, the incoming material width is 1000mm, the incoming material thickness is 8.0mm, and the magnesium alloy wide sheet product has a thickness of 1.0mm and a width of 2000mm.

[0134] Such as Figure 2~3 As shown, the cross-sectional shape of the wide sheet rolling blank includes a middle thin zone. Thick zones are arranged on both sides of the middle thin zone. The thick zone and the middle thin zone are connected by a transition zone. The thickness of the blank in the transition zone ranges from the thick zone to the middle thin zone. The area continuously decreases. The transition connection mode of the transition zone in the second embodiment is a straight transition connection.

[0135] The rolling process of the magnesium alloy wide sheet adopts the following steps in sequence:

[0136] (1) Determination of the shape and size of the rolled billet

[0137] The reduction rate ε of the middle thin zone of the blank in the second examp...

Embodiment 3

[0157] The selected rolled product type is AZ31, the incoming material width is 600mm, the incoming material thickness is 6.0mm, the thickness of the magnesium alloy wide sheet product is 1.5mm, and the width l is 1600mm.

[0158] Such as Figure 1~2 As shown, the cross-sectional shape of the wide sheet rolling blank includes a middle thin zone. Thick zones are arranged on both sides of the middle thin zone. The thick zone and the middle thin zone are connected by a transition zone. The thickness of the blank in the transition zone ranges from the thick zone to the middle thin zone. The area continuously decreases. The transition connection mode of the transition zone in the third embodiment is circular arc transition connection.

[0159] The rolling process of the magnesium alloy wide sheet adopts the following steps in sequence:

[0160] (1) Determination of the shape and size of the rolled billet

[0161] The reduction rate ε in the middle thin zone of the rolled billet in the thi...

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Abstract

The invention discloses a technology method for manufacturing a wide sheet through a magnesium alloy cast rolled plate and belongs to the technical field of manufacturing of wide sheets through magnesium alloy cast rolled plates. The technology method is characterized in that the rolling technology of the aluminum alloy wide sheet comprises the following steps that firstly, the dimension of a wide sheet rolled blank is determined, 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, and the thickness of the parts, in the transition areas, of the blank is gradually reduced from the thick areas to the middle thin area; secondly, the wide sheet rolled blank is rolled; and thirdly, the wide sheet is rolled. According to the technology method, shaping rolling is added before rolling of the magnesium alloy wide sheet, the shape of the rolled blank is changed, and therefore the good blank is provided for rolling of the magnesium alloy wide sheet. By means of the subsequent rolling process of the blank, edge cracking of magnesium alloy rolling is relieved, the width of the magnesium alloy sheet is increased, and the magnesium alloy wide sheet can meet use requirements better.

Description

Technical field [0001] The invention belongs to the technical field of magnesium alloy cast-rolled plates or cast-rolled coils for directly rolling wide-width thin plates, and specifically relates to a process method for preparing wide-width thin plates from magnesium alloy cast-rolled plates. Background technique [0002] Magnesium alloy is currently the lightest metal structural material in engineering applications, and has become an important material in national defense and military, aerospace, automotive, electronic communications and other industrial fields. With the launch of large-scale engineering projects such as my country's high-speed rail transit and electric vehicles, higher requirements have been placed on large-scale magnesium alloy products. [0003] From the perspective of thickness, magnesium alloy wide sheets can be divided into thick plates and thin plates according to conventional metal plates. Those with a thickness not less than 6.0mm are called plates, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/46B21B15/00B21B37/16B21B37/22B21B37/56B21B37/74
CPCB21B1/463B21B15/0007B21B37/16B21B37/22B21B37/56B21B37/74B21B2015/0014B21B2015/0021B21B2261/04B21B2261/06B21B2261/12B21B2261/20
Inventor 刘光明姬亚锋马立峰黄志权周存龙黄庆学
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY