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Method for preparing deep drawing molybdenum belt

A molybdenum strip and deep-drawing technology, which is applied in the field of deep-drawn molybdenum strip preparation, can solve the problems of high deep-drawing reject rate, increased anisotropy, and low production efficiency, and achieve good deep-drawing performance, increased transverse elongation, and weak effect

Active Publication Date: 2010-01-06
WESTERN METAL MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the molybdenum materials used for deep drawing CCFL are ordinary small-size cold-rolled cross molybdenum sheets, which have a very strong processing texture, resulting in increased anisotropy and a high deep-drawing scrap rate
On the other hand, with the expansion of demand for LCD screens and the improvement of mold manufacturing levels, the production efficiency of deep-drawing CCFL using sheets is obviously low. It is hoped that a large number of molybdenum belts will be used, and ordinary molybdenum belts cannot meet the requirements of the deep-drawing process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The pure molybdenum billet with Mo% not less than 99.95% is used for the first fire rolling of billet opening at 1050 ° C, and the rolling direction is 45 ° cross rolling (45 ° to the axial direction of the roll); the first rolling is carried out at 1000 ° C The first cross-rolling, the rolling direction is still 45°, but perpendicular to the first rolling direction; the second cross-rolling is carried out at 950°C, the rolling direction is 90° to the axial direction of the roll; the cold rolling stage is carried out The third cross-rolling, the rolling direction is 90° to the axial direction of the roll, and the molybdenum strip of 0.2×100×≥1300mm is obtained, and the finished heat treatment is carried out at 750°C×90min, and its properties are rolling direction tensile strength 680Mpa, rolling direction elongation 10%, transverse tensile strength 650Mpa, transverse elongation 8%, cupping value 5.5mm, high-performance deep-drawn molybdenum belt with hardness HV235.

Embodiment 2

[0014] The pure molybdenum billet with Mo% not less than 99.95% is used for the first fire rolling of billet opening at 1000°C, and the rolling direction is 45° cross rolling (45° to the axial direction of the roll); the first rolling is carried out at 950°C The first cross-rolling, the rolling direction is still 45°, but perpendicular to the first rolling direction; the second cross-rolling is carried out at 900°C, the rolling direction is 90° to the axial direction of the roll; the cold rolling stage is carried out The third cross-rolling, the rolling direction is 90° to the axial direction of the roll, and the molybdenum strip of 0.15mm×80mm×≥1500mm is obtained, and the finished heat treatment is carried out at 700°C×60min. High-performance deep-drawn molybdenum strip with a tensile strength of 8%, a transverse tensile strength of 720Mpa, a transverse elongation of 6%, a cupping value of 4.5mm, and a hardness of HV265.

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Abstract

The invention relates to a preparation method of a deep-drawing molybdenum strip, in particular to a technological method of producing refractory metal strips through rolling. The preparation method is characterized in that the strip is rolled with pure molybdenum ingots; in the rolling process, the first heating of cross rolling is conducted under 950 DEG C to 1000 DEG C, and the rolling direction forms 45-degree cross-rolling with the axial direction of a roller; the second heating of cross rolling is conducted under 900 DEG C to 950 DEG C, and the rolling direction forms 90 degrees with the axial direction of the roller; in the cold rolling stage, the third cross rolling is conducted, and the rolling direction forms 90 degrees with the axial direction of the roller; the finished product receives heat treatment under 700 DEG C to 750 DEG C for 60min. The high-performance deep-drawing molybdenum strip with tensile strength of more than or equal to 680MPa in the rolling direction, extensibility of more than or equal to 8.0 percent in the rolling direction, transverse tensile strength of more than or equal to 650MPa, transverse extensibility of more than or equal to 6 percent, cupping value of more than or equal to 4.5mm and hardness (HV) of equal to or more than 235 and equal to or less than 265 is prepared by the method of the invention.

Description

technical field [0001] The invention discloses a method for preparing a deep-drawn molybdenum strip, which relates to a process method for producing a refractory metal strip by rolling. technical background [0002] Molybdenum, a refractory metal, is deep-drawn and can be used to make important components of cold-cathode fluorescent tubes (CCFLs) for LCD backlights. The molybdenum material used for deep drawing must have high strength and plasticity in rolling direction and transverse direction, as well as good deep drawing performance. [0003] At present, most of the molybdenum materials used for deep drawing CCFL are ordinary small-size cold-rolled cross molybdenum sheets, which have a very strong processing texture, resulting in increased anisotropy and a high deep-drawing scrap rate. On the other hand, with the expansion of demand for LCD screens and the improvement of mold manufacturing levels, the production efficiency of deep-drawing CCFL using sheets is obviously l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/18C21D8/04
Inventor 邓自南张永刚惠军锋金波赵娟杨明杰
Owner WESTERN METAL MATERIAL