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Rolling technique of ultra-fine grained magnesium alloy sheet

A magnesium alloy plate and rolling technology, which is applied in metal rolling, manufacturing tools, heat treatment equipment, etc., can solve the problems of low production efficiency, inability to obtain large-width strips, and high product costs

Active Publication Date: 2009-05-06
山西银光华盛镁业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to obtain the product strips of magnesium alloy fine-grained structure and meet the production needs of fine-grained magnesium alloy strips, it is currently necessary to adopt a large extrusion ratio extrusion process or equal-diameter angular channel extrusion with high production costs. The efficiency is low, the cost of the product is too high, and these methods cannot obtain large-width strips

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1 AZ31B plate rolling

[0017]The thickness of the cast-rolled sheet formed by twin-roll casting and rolling is about 4 mm, which is a sheet or coiled slab, and the average initial grain size of casting-rolling is 30 microns. The cast-rolled sheet is fed into a high-frequency induction heating coil to be rapidly heated to 450°C and immediately hot-rolled. High-frequency induction heating equipment can be ordered directly from professional manufacturers according to specific production, and the equipment capacity must start from the product structure. The power of our high-frequency induction heating equipment is 125KW. The main technical parameters of the hot rolling mill and process are: 2-high rolling mill, working roll diameter 400 mm, rolling speed 60 m / min, deformation in the first pass 20%, and plate temperature after the first pass is reduced to about 280°C . Afterwards, continue warm rolling, gradually reduce multi-pass warm rolling, and the deforma...

Embodiment 2

[0018] Embodiment 2 MB8 plate rolling

[0019] Twin-roll cast-rolled near-net-formed cast-rolled sheet has a thickness of 6 mm in sheet or coil form, and the average initial grain size of cast-rolled is 50 microns. The cast-rolled sheet is fed into the high-frequency induction heating coil to be rapidly heated to 420°C and immediately hot-rolled. The main technical parameters of the hot-rolling mill and process are: 2-roll mill, working roll diameter 400 mm, rolling speed 60 m / min, first The pass deformation is 35%, and the plate temperature is reduced to about 250°C after the first rolling pass. Afterwards, continue warm rolling, gradually reduce multi-pass warm rolling, and the deformation rate of each pass is in the range of 10-5%. When the plate temperature drops below 200°C, stop rolling, and the intermediate processing during hot rolling The rate is about 50%. The thickness of the magnesium plate after rolling is less than 3 mm. The hot-rolled plate is heated to 250°C...

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Abstract

The invention relates to a rolling technique used for producing superfine crystal magnesium alloy plate band materials. The rolling technique is characterized in that a thin near-net shaped magnesium alloy cast-rolled plate is fast heated to hot rolling temperature, then treated with hot rolling with first pass great deformation magnitude, and then treated with low-temperature softening annealing; and a hot rolling machine is used for regulating the plate to a regulated thickness by multi-pass cold rolling, and the plate is treated with controlled hot treatment to form a finished magnesium alloy plate with crystal grains less than 10 micrometer. The cost of the production method of the invention is low, the technical procedure is short, and the product quality is high.

Description

technical field [0001] The invention relates to a production technology of magnesium alloy plates and strips, in particular to a rolling technology for producing ultra-fine-grained magnesium alloy thin plates. Background technique [0002] Magnesium alloy sheet is an important material for plastic processing of magnesium alloy. Volume forming and sheet forming can be used to obtain various machine parts, structural parts and equipment with better quality and lower price than the currently used magnesium alloy casting method. Magnesium alloy sheet processing greatly simplifies the production process of magnesium alloy deep processing, reduces costs, and expands the scope of application. [0003] At present, magnesium alloy sheets are basically produced by hot extrusion and rolling. Hot extrusion can only produce narrow strips. The production process of magnesium alloy rolled plate is very complicated, including the production of cast slab, the face milling of cast slab, the...

Claims

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Application Information

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IPC IPC(8): B21B3/00C21D9/46C21D9/70
Inventor 李华伦吴江才文钰许月旺李书伟
Owner 山西银光华盛镁业股份有限公司
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