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Method for manufacturing ultra-thin nanocrystalline metal strip

A technology of metal poles and nanocrystals, applied in the field of rolling, can solve problems such as difficult and low-cost production, limited research and application, and achieve the effects of continuous, uniform grain refinement, and improved production efficiency

Active Publication Date: 2015-11-25
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] With the development of micro-manufacturing technology and micro-forming technology, the demand for ultra-thin metal and alloy strips is increasing, and it is widely used in the microelectronics industry, micro-manufacturing industry, instrumentation industry and micro-electromechanical industry, etc.; nanocrystalline metal ultra-thin Because of the advantages of both nanocrystalline metal materials and ultra-thin ribbons, ribbons have great commercial potential, but conventional nanocrystalline metal material preparation methods are difficult to achieve continuous low-cost production, which limits its research and application

Method used

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  • Method for manufacturing ultra-thin nanocrystalline metal strip

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preparation example Construction

[0028] The cumulative reduction coefficient of the preparation method of the ultra-thin nanocrystalline metal strip of the present invention is greater than or equal to 40.0.

[0029] The transmission electron microscope used in the present invention is TecnaiG 2 20.

[0030] The structure of the preparation device of the nanocrystalline metal extremely thin strip of the present invention is as follows: figure 1 As shown, the asynchronous ultra-thin strip mill 1 sets the rolling speed, the variable speed ratio and the variable speed ratio adjustment step through the control system, and adjusts the variable speed ratio online through the control system; the control system includes a main control computer 2, PLC4 and console 3.

[0031] The maximum rolling speed of the asynchronous ultra-thin strip mill used in the embodiment of the present invention is 130mm / s, and the maximum rolling force is 500kN.

Embodiment 1

[0033] 1. The raw material used is a Q195 steel strip with a thickness of 350 μm and a width of 80 mm. The composition is C0.06~0.12%, Mn0.25~0.50%, Si≤0.30%, S≤0.05%, P≤0.045% by weight, The rest is Fe, the grain size is 12μm, and the yield strength of the raw material is 195MPa; start the power supply of the rolling mill system, and pass the Q195 steel strip through the gap between the upper and lower work rolls, and roll it onto the two reels;

[0034] 2. Set the rolling speed, variable speed ratio, variable speed ratio adjustment step, pre-compression force and front and rear tensile stress of the asynchronous ultra-thin strip rolling mill; the rolling speed is 50mm / s, which is 38.5% of the maximum rolling speed of the rolling mill , the variable speed ratio is 1.0, and the variable speed ratio adjustment step is 0.01; the front and rear tensile stress is 70MPa, which is 35.9% of the yield strength of the rolled piece raw material, and the pre-compression force is 100kN, wh...

Embodiment 2

[0040] Method is with embodiment 1, and difference is:

[0041] (1) The raw material used is a copper strip with a thickness of 1000μm and a width of 50mm, the grade is T2, and the composition contains Cu99.90%, Ag0.022%, Bi0.0005%, Sb0.001%, As0.002%, by weight percentage, Fe0.002%, Ni0.009%, Pb0.005%, Sn0.002%, S0.005%, Zn0.008%, O0.025%, the grain size is 14μm, and the yield strength of the raw material is 70MPa;

[0042] (2) Set the rolling speed to 120mm / s, which is 92.3% of the maximum rolling speed of the rolling mill, the variable speed ratio to 1.2, and the variable speed ratio adjustment step to 0.02; the front and rear tensile stress is 40MPa, which is the yield strength of the rolled piece raw material 57.1%, the pre-compression force is 130kN, which is 26.0% of the maximum rolling force of the rolling mill;

[0043] (3) After one pass of rolling, reset the rolling speed to 120mm / s, which is 92.3% of the maximum rolling speed of the rolling mill, the different spe...

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Abstract

The invention provides a method for manufacturing an ultra-thin nanocrystalline metal strip and belongs to the technical field of rolling. The method includes the following steps that 1, raw materials, such as steel or copper or aluminum or nickel or titanium or molybdenum strips are adopted, or an alloy strip of the metal serves as a rolled piece, and the depth of the strips ranges from 200 micrometers to 500 micrometers; 2, the rolling speed, the different speed ratio, the different speed ratio adjusting step length, the pre-tightening pressure and front-rear tensile stress of an asynchronous ultra-thin strip rolling machine are set; 3, the rolling machine is started to conduct one-pass rolling, and the different speed ratio is adjusted online while rolling; 4, the depth of the rolled piece is measured, and the rolling speed, the different speed ratio, the different speed ratio adjusting step length, the front-rear tension and the pre-pressing force are reset; 5, the rolling machine is started to conduct next-pass rolling, and the different speed ratio is adjusted while rolling; and 6, the step 2 to the step 5 are carried out repeatedly till the depth of the rolled piece ranges from 1 micrometer to 5 micrometers. By means of the method, continuous production of the ultra-thin nanocrystalline metal strip can be achieved without intermediate annealing.

Description

technical field [0001] The invention belongs to the technical field of rolling, and in particular relates to a preparation method of a nanocrystalline metal ultra-thin strip. Background technique [0002] Nanocrystalline metal materials generally refer to metal materials with a grain size of less than 100nm; nanocrystalline metal materials exhibit mechanical, electrical, and magnetic properties that are very different from those of ordinary metal materials due to their small grain size and large specific surface area of ​​grain boundaries. . Nanocrystalline metal materials can be prepared by gas-phase methods, such as vapor-phase deposition and sputtering, or by liquid-phase methods, such as rapid quenching, or by strong plastic deformation, such as ball rolling. , high pressure torsion method and ultrasonic shot peening method, etc. [0003] With the development of micro-manufacturing technology and micro-forming technology, the demand for ultra-thin metal and alloy strip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/22B21B37/46
Inventor 刘相华宋孟孙祥坤陈守东邵云云冯禄
Owner NORTHEASTERN UNIV
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