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Preparation method of tungsten plate

A technology of plate and tungsten slab, which is applied in the field of tungsten plate preparation, can solve the problems of easy deformation and warpage, product failure, poor creep resistance, etc., and achieve excellent deformation resistance, flat surface and high density. Effect

Inactive Publication Date: 2021-06-22
张玉琪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, tungsten plates are mainly obtained by powder metallurgy combined with pressure processing and subsequent mechanical processing. For example, tungsten plates used in the MOCVD field use pure tungsten powder as raw materials, and process tungsten plates through cold isostatic pressing, intermediate frequency sintering, and mechanical processing. , the tungsten plate prepared by this method has poor creep resistance under high-temperature use environment, and is particularly prone to deformation and warping. The high-temperature deformation resistance is poor, resulting in product failure, and it is difficult to meet customer requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The preparation method of the tungsten sheet material of the present embodiment is characterized in that, comprising the following steps:

[0021] Step 1. Press the tungsten powder into a slab by means of cold isostatic pressing, heat and sinter the slab in a hydrogen atmosphere, and obtain a tungsten slab after natural cooling; the heating and sintering process is as follows: Heat to 1500°C at a rate of 8°C / min, heat for 2 hours, then heat to 1700°C at a rate of 5°C / min, heat to 2100°C at a rate of 3°C / min for 6 hours, and hold for 10 hours

[0022] Step 2, covering the tungsten slab described in step 1 with a steel ladle;

[0023] Step 3, rolling the tungsten slab covered by the ladle in step 2 twice; the temperature of the two-pass rolling is 1500°C, and the total deformation of the two-pass rolling is not more than 35%. The deformation of each rolling pass is 15% to 20%;

[0024] Step 4. Reverse the direction of the tungsten slab rolled in step 3 and then carry ou...

Embodiment 2

[0030] The preparation method of the tungsten sheet material of the present embodiment is characterized in that, comprising the following steps:

[0031] Step 1. Press the tungsten powder into a slab by means of cold isostatic pressing, heat and sinter the slab in a hydrogen atmosphere, and obtain a tungsten slab after natural cooling; the heating and sintering process is as follows: Heat to 1500°C at a rate of 8°C / min, heat for 2 hours, then heat to 1700°C at a rate of 5°C / min, heat to 2100°C at a rate of 3°C / min for 6 hours, and hold for 10 hours

[0032] Step 2, covering the tungsten slab described in step 1 with a steel ladle;

[0033] Step 3. Rolling the tungsten slab covered by the ladle in step 2 in two passes; the temperature of the two passes of rolling is 1700° C., and the total deformation of the two passes of rolling is not more than 35%. The deformation of each rolling pass is 15% to 20%;

[0034] Step 4. Reverse the direction of the tungsten slab rolled in step...

Embodiment 3

[0040] The preparation method of the tungsten sheet material of the present embodiment is characterized in that, comprising the following steps:

[0041] Step 1. Press the tungsten powder into a slab by means of cold isostatic pressing, heat and sinter the slab in a hydrogen atmosphere, and obtain a tungsten slab after natural cooling; the heating and sintering process is as follows: Heat to 1500°C at a rate of 8°C / min, heat for 2 hours, then heat to 1700°C at a rate of 5°C / min, heat to 2100°C at a rate of 3°C / min for 6 hours, and hold for 10 hours

[0042] Step 2, covering the tungsten slab described in step 1 with a steel ladle;

[0043] Step 3, rolling the tungsten slab covered by the ladle in step 2 in two passes; the temperature of the two passes of rolling is 1600°C, and the total deformation of the two passes of rolling is not more than 35%. The deformation of each rolling pass is 15% to 20%;

[0044] Step 4. Reverse the direction of the tungsten slab rolled in step 3...

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PUM

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Abstract

The invention discloses a preparation method of a tungsten plate. The preparation method comprises the following steps: 1, pressing tungsten powder into a plate blank in a cold isostatic pressing manner, heating and sintering the plate blank in a hydrogen atmosphere, and carrying out natural cooling to obtain a tungsten plate blank; 2, wrapping the tungsten plate blank with a steel ladle sleeve; 3, carrying out two-pass rolling on the tungsten plate blank wrapped with the steel ladle sleeve in S2; 4, reversing the tungsten plate blank after rolling in S3 and then carrying out two-pass rolling; 5, repeating S3 and S4 until the required thickness is reached; 6, removing the steel ladle sleeve to obtain a semi-finished product; and 7, carrying out heat treatment on the semi-finished product in S6, so that the tungsten plate is obtained. The tungsten plate prepared through the method is smooth in plate face, free of layering, cracking, loosening and the like in the plate, high in density, uniform in structure and excellent in deformation resistance.

Description

technical field [0001] The invention belongs to the technical field of tungsten plate preparation, and in particular relates to a preparation method of a tungsten plate. Background technique [0002] Tungsten is a refractory metal. Due to its high hardness, high melting point and excellent heat resistance, it is often used as an important structural material and heating element for various ultra-high temperature heating furnaces. Tungsten plate products made of metal tungsten are widely used in Aerospace devices, ion implantation and coating industry and other fields. At present, tungsten plates are mainly obtained by powder metallurgy combined with pressure processing and subsequent mechanical processing. For example, tungsten plates used in the MOCVD field use pure tungsten powder as raw material, and process tungsten plates through cold isostatic pressing, intermediate frequency sintering, and mechanical processing. , the tungsten plate prepared by this method has poor c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/02
CPCB21C37/02
Inventor 不公告发明人
Owner 张玉琪