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A kind of method of rolling magnesium alloy strip

A magnesium alloy sheet and rough rolling mill technology is applied in the field of rolling magnesium alloy sheets and strips, which can solve the problems of complex rolling process, small size of casting billet, slow rolling rhythm, etc., and achieve simple production process, large billet size, Rolling fast-paced effects

Active Publication Date: 2015-10-07
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1. Repeated rolling and repeated heating are adopted, and the rolling process is complicated;
[0008] 2. Single-stand reversible rolling is adopted, and the rolling rhythm is slow;
[0009] 3. The billet size used is small and the rolling efficiency is low;

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Select AZ31 magnesium alloy casting slab, the size of the casting slab is 100*750*2000mm, mill the face (milling thickness is based on the removal of surface defects), and then annealing treatment, the annealing temperature is 450 ℃, keep warm for 200 minutes, and then cool to room temperature with the furnace , and then sent to the heating furnace for heating, the heating temperature is 400 ° C, heat preservation for 150 minutes, through the roller table with heat preservation cover and heating device (the roller table is heated to 100 ° C) and transported to the rough rolling mill for R1 rolling for 3 passes, R2 rolling 3 passes, rolled into an intermediate billet with a thickness of 10mm, the finishing temperature of the rough rolling is 360°C, and then sent to the finish rolling unit for continuous rolling, finally rolled to 4mm, and the finish rolling temperature is 320°C. The properties of the obtained magnesium plate are: the yield strength is 142MPa, the tensile ...

Embodiment 2

[0047] Select AZ31 magnesium alloy billet, the billet size is 200*900*4000mm, annealing treatment is carried out after face milling, annealing temperature is 500°C, heat preservation for 600 minutes, then cooled to room temperature with the furnace, milled face again and sent to the heating furnace Heating, the heating temperature is 550°C, the heat preservation is 500 minutes, and it is transported to the rough rolling mill through the roller table with heat preservation cover and heating device (the roller table is heated to 150°C) for 3 passes in R1, 3 passes in R2, and 3 passes in R2. The intermediate slab with a thickness of 30mm is made, and the finishing temperature of the rough rolling is 420°C, and then sent to the finish rolling unit for continuous rolling, and finally rolled to 15mm. The finishing temperature of the finish rolling is 380°C. The properties of the obtained magnesium plate are: the yield strength is 135MPa, the tensile strength is 231MPa, and the elonga...

Embodiment 3

[0049]Select AZ31 magnesium alloy casting slab, the size of the casting slab is 150*800*3000mm, annealing treatment is carried out after face milling, the annealing temperature is 480 ℃, heat preservation for 300 minutes, then cooled to room temperature with the furnace, and then sent to the heating furnace for heating, the heating temperature at 450°C, keep it warm for 280 minutes, and transport it to the rough rolling mill R1 for 3 passes and R2 for 3 passes through a roller table with a heat preservation cover and a heating device (the roller table is heated to 120°C), and roll it to a thickness of The 15mm intermediate billet is finished at a temperature of 375°C for rough rolling, and then sent to the finish rolling unit for continuous rolling, and finally rolled to 8mm, with a finish temperature of 340°C. The properties of the obtained magnesium plate are: the yield strength is 138MPa, the tensile strength is 235MPa, and the elongation after fracture is 15.2%.

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Abstract

The invention relates to a method for rolling a magnesium alloy sheet strip. The method comprises the following steps of: heating and annealing in a heating furnace by using hot continuous rolling equipment, and additionally arranging a heating device on the hot continuous rolling equipment to realize the purpose of rolling the magnesium alloy sheet strip in a semi-continuous manner, wherein the magnesium alloy sheet strip which is 4-15mm thick, 750-900mm wide and 50000-60000mm long can be rolled. The method disclosed by the invention is simple in production procedure, fast in rolling cycle, large in casting blank size and high in production efficiency.

Description

technical field [0001] The invention relates to the technical field of processing non-ferrous metal magnesium alloys, in particular to a method for rolling magnesium alloy strips. Background technique [0002] Magnesium alloys are traditionally regarded as a metal that is difficult to plastically deform and has poor pressure processing performance. The research progress in the processing technology of deformed magnesium alloys is relatively slow. The main reason is that the plastic deformation ability of deformed magnesium alloys is poor, and it is difficult to fix it. At present, wrought magnesium alloys are mainly produced by plastic processing methods such as extrusion, rolling, forging, stamping, bending, and stretching. Among them, profiles, pipes, and bars are mainly produced by hot extrusion processes, while plates are mainly produced by hot rolling processes. Completed, the traditional production process of magnesium alloy strips adopts plate-type single-piece recip...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/26C21D8/02C22F1/06
Inventor 李文斌王军生赵坦李广龙原思宇郭晓波张文
Owner ANGANG STEEL CO LTD
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