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Preparation method for synchronously cold-rolling iron foil by using laminated method

A lamination method, iron foil technology, applied in metal rolling and other directions, can solve the problems of complex equipment, difficult to approach 50μm, and the rolling process is of great significance, and achieve the effect of high efficiency and low cost

Inactive Publication Date: 2014-07-30
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, multi-roll rolling mills and asynchronous rolling mills have the problems of large investment, complex equipment, and difficulty in configuration in ordinary factory workshops, and the rolling limit thickness is generally difficult to approach 50 μm. It is of great significance to develop a rolling process that can prepare iron foil with ordinary cold rolling mills
The material to be processed is divided into thick and thin stacks, and applied to a common synchronous cold rolling mill to roll out a foil strip. No related patents and reports have been found in the search.

Method used

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  • Preparation method for synchronously cold-rolling iron foil by using laminated method
  • Preparation method for synchronously cold-rolling iron foil by using laminated method

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Select one piece of pure iron with a size of 0.2×100×500mm, and two pieces of pure iron with a size of 4.0×100×500mm; place the 0.2mm thick pure iron piece in a vacuum furnace at 1050°C+10min for recrystallization annealing, 4.0mm The thick pure iron sheet is placed in a vacuum furnace at 500℃+30min for recovery annealing; both sides of the thin iron sheet and one side of the thick iron sheet are polished with 2000 metallographic sandpaper to make the surface roughness reach Ra0.1; Apply graphite on both sides of the sheet, and stack the three pure iron sheets in the order of 4.0 pure iron-0.2 pure iron-4.0 pure iron, and ensure that the laminated contact surface is the surface after bright treatment; riveting the stacked composite sheet head to tail, A two-roll rolling mill is used to carry out two 30% cold rolling reductions; after rolling, the laminated group is untied, and the thin pure iron sheet is taken out. The thickness of the thin iron sheet at this time is abo...

Embodiment 2

[0028] Select one piece of DT4 electrical pure iron with a size of 0.15×100×500mm, and two pieces of DT4 electrical pure iron with a size of 2.0×100×500mm; place the 0.15mm thick electrical pure iron sheet in a vacuum furnace at 950°C+20min for reprocessing Crystallization annealing, 2.0mm thick electrical pure iron sheet is placed in a vacuum furnace at 550°C + 20min for recovery annealing; both sides of the thin iron sheet and one side of the thick iron sheet are treated with a polishing machine to make the surface roughness reach Ra0.05; Then apply extreme pressure lithium-based grease on both sides of the thin iron sheet, and stack the three iron alloy sheets in the order of 2.0 Fe-0.15 Fe-2.0 Fe, and ensure that the contact surface of the stack is the surface after bright treatment; combine the stacks For head and tail riveting, a four-roll mill is used to carry out two 20% cold rolling reductions; after rolling, the laminated group is untied, and the thin pure iron sheet ...

Embodiment 3

[0030] Select one piece of iron-nickel alloy with a size of 0.25×100×500mm and two pieces of iron-nickel alloy with a size of 1.0×100×500mm; place the 0.25mm-thick iron-nickel alloy piece in a vacuum furnace at 850°C+60min for recrystallization annealing, 1.0 mm thick ferroalloy sheets are placed in a vacuum furnace at 600°C + 20min for recovery annealing; before stacking, a smooth cold rolling mill is used to cold-roll the thick and thin iron sheets at a reduction rate of 20% to make the iron and nickel Roll out a smooth surface with a roughness better than Ra1.6 on both sides of the alloy; then smear graphite on both sides of the thin iron sheet, and stack the three iron-nickel alloy sheets in the order of 1.0 Fe-0.25 Fe-1.0 Fe; combine the stacks The four corners of the sheet are bonded with 502 glue, and the four-roll mill is used to carry out two cold rolling reductions of 35%; after rolling, the laminated group is untied, and the thin pure iron sheet is taken out. The thi...

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Abstract

The invention relates to a preparation method for synchronously cold-rolling iron foil by using a laminated method. The method belongs to the technical field of rolling. The method comprises the following steps of: selecting a plurality of thick iron pieces and a plurality of thin iron pieces, wherein the thin iron pieces are clamped by the thick iron pieces to form a laminated structure; respectively carrying out heat treatment on each laminated layer of materials before rolling, and coating a lubricating material among laminations; and delivering the combination laminated structure to a common two-roller or four-roller rolling machine for cold-rolling and thinning, and thinning the thin iron pieces to iron foil with required thicknesses by selecting an appropriate reduction ratio and rolling passes. With the adoption of the preparation method for synchronously cold-rolling the iron foil by using the laminated method, the defects of low efficiency, large environment pollution, complex equipment, high cost, and the like of other preparation method are overcome, and the preparation method is suitable for preparing an extremely thin material of materials of pure iron, iron alloy and the like. The preparation method has the characteristics of being simple in process and convenient for operation. The prepared iron foil has high dimensional precision, good shape, and good flatness and surface quality. The preparation method has the characteristics of being high in efficiency, convenient, energy-saving, low in cost and the like and is suitable for industrial application.

Description

technical field [0001] The invention relates to a forming technology of pure iron and iron alloy foils, in particular to a method for preparing synchronous cold-rolled iron foils by a lamination method; it belongs to the technical field of extremely thin metal sheet rolling. Background technique [0002] Iron foil usually refers to a thin strip with an iron thickness of less than 150 μm, which is mainly used in the electronic and electrical industries and packaging materials. Compared with other foil materials, iron foil mainly has: high mechanical strength, high magnetic permeability, good magnetic absorption ability and electromagnetic wave shielding ability, high melting point, good fire resistance, good moisture resistance, and easy to apply adhesive on the surface and coatings. [0003] At present, the main manufacturing process of iron foil is electrodeposition and rolling. Although the electrodeposition process can produce ultra-thin and wide iron foil, it only produ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/40
Inventor 王德志杨益航林高用陈点点柳华炎
Owner CENT SOUTH UNIV
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