Method for leveling tungsten plate with high straightness

A flatness and leveling technology, which is applied in the leveling field of high-flatness tungsten plates, can solve the problems that cannot meet the thermal leveling requirements of tungsten plates, and achieve the effect of preventing oxidation and ensuring the leveling effect

Active Publication Date: 2007-05-16
WESTERN METAL MATERIAL
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AI Technical Summary

Problems solved by technology

Since the tungsten plate (sheet) will undergo a violent oxidation reaction when heated in an oxidizing atmosphere, the softening temperature of the tungsten plate (sheet) is very high, so the titanium plate thermal leveling device cannot meet the thermal leveling requirements of the tungsten plate (sheet)

Method used

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  • Method for leveling tungsten plate with high straightness

Examples

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Effect test

Embodiment 1

[0021] Take a tungsten sheet with a thickness of 0.2mm, a counterweight tungsten block 14, a flatness of ≤±0.02mm, and a high-temperature molybdenum alloy 15 as a leveling pressing block, and the leveling tungsten plates (sheets) 16 are neatly placed on the pressing blocks In the middle, a tungsten block is placed on top of the top layer as a counterweight. The leveling pressing block, tungsten sheet, and counterweight are placed on the silicon carbide heat-resistant plate of the material basket as a whole; then the material basket is placed on the support platform of the leveling isolation protection tank; and then the leveling isolation protection tank is hoisted into the vertical resistance In the furnace, hydrogen gas is introduced, under the heating condition of 850℃×1h+1100℃×2h, the heating and leveling is carried out, and the leveling is completed after cooling to room temperature.

Embodiment 2

[0023] Take a tungsten plate with a thickness of 1.0mm, and other conditions are the same as in Example 1. Use TZM alloy as a leveling block with a flatness of ≤±0.02mm, and heat it at 950°C×1h+1200°C×2h. Heating and leveling, cooling to room temperature, complete leveling, tungsten sheet flatness ≤ ± 0.02mm, not oxidized.

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Abstract

The invention relates to a method for correcting tungsten plate, which comprises it uses the high-temperature molybdenum alloys with high flat degree or TZM alloy as the correct compression block; puts the tungsten plat at the middle of compression block; arranges tungsten block above the top compression block as the weight; then puts them in the steel basket resistant to high temperature; puts at the bottom of correct insulated protective pot with hydrogen gas; then puts the pot in upright resistance furnace to be heated, corrects the pressure and weight of compression block, then cooling to room temperature. The invention uses the correct compression block which will not deform at high temperature, to conform the correct effect. And it uses hydrogen gas and the cooling water sheath to form heating pot to avoid oxidizing tungsten plate.

Description

technical field [0001] A method for leveling a high-flatness tungsten plate relates to a method for thermally leveling a tungsten plate (sheet) to obtain a high-flatness tungsten plate (sheet). Background technique [0002] High flatness tungsten plate (sheet) is often used as a key component in the collimator of medical CT machine, and its flatness requirement is within 0.02mm. Most of the methods for thermal leveling of tungsten plates (sheets) use multi-roller leveling machines, hydraulic presses for leveling, etc., and the leveling effect is not ideal. [0003] In production, when leveling the titanium plate, use the pressure and self-weight of the briquette to heat it in a vacuum heating furnace or an electric furnace for a period of time, and then cool it to room temperature to obtain a titanium plate with better flatness. Since the tungsten plate (sheet) will undergo a violent oxidation reaction when heated in an oxidizing atmosphere, the softening temperature of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D1/00B21D37/16
Inventor 巨建辉赵鸿磊刘宁平邓自南郭让民门平张斌
Owner WESTERN METAL MATERIAL
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