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Method for rolling small-coarseness high-light thin wolfram sheet

A roughness and high-brightness technology, applied in metal rolling, temperature control, metal rolling, etc., can solve problems such as poor surface consistency and inability to reduce the roughness of tungsten sheets, so as to avoid cracks and peeling, eliminate Surface contamination and microcracks, effect of removing surface contamination

Active Publication Date: 2008-05-21
WESTERN METAL MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the use of graphite as a protective and lubricating material, there are many shallow pits extruded by graphite on the surface of the thin tungsten sheet prepared by this method, resulting in a roughness of the tungsten sheet greater than 0.2 μm, and the surface treatment by electrolytic polishing can only improve The brightness of the tungsten sheet cannot reduce the roughness of the tungsten sheet, and the surface consistency is poor

Method used

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  • Method for rolling small-coarseness high-light thin wolfram sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take a raw tungsten plate with a thickness of 0.2mm, use 240# water sandpaper to grind the surface of the raw tungsten plate, and then use 1%NaOH+4%K 2 CO 3 +4% KCLO 3 + Yu H 2 O electrolyte, polishing for 20min; using fine grinding and rolling work rolls with roughness less than 0.1μm; preheating temperature of rolls is 100℃; preheating temperature of raw tungsten plate is 100℃; The preheated four-high reversing rolling mill directly conducts block rolling without coating graphite and other lubricating materials. The initial rolling force is 40T, and then the rolling force is gradually increased, and the final rolling force is 80T. After multiple passes A thin tungsten sheet with a finished product thickness of 0.15 mm is obtained by rolling, the total processing rate is 25%, the surface is bright and consistent, and the detected surface roughness is 0.12 μm.

Embodiment 2

[0029] Take a raw tungsten plate with a thickness of 0.25mm, use 240# water sandpaper to grind the surface of the raw tungsten plate, and then use 1%NaOH+4%K 2 CO 3 +4% KCLO 3 + Yu H 2 O electrolyte, polish for 30min; use fine grinding and rolling work rolls with roughness less than 0.1μm; roll preheating temperature is 150℃; raw tungsten plate preheating temperature is 200℃; surface treated and preheated tungsten plate The preheated four-high reversing rolling mill directly conducts block rolling without coating graphite and other lubricating materials. The initial rolling force is 40T, and then the rolling force is gradually increased. The final rolling force is 60T. After multiple passes A thin tungsten sheet with a finished product thickness of 0.2 mm is obtained by rolling, the total processing rate is 20%, the surface is bright and consistent, and the detected surface roughness is 0.14 μm.

Embodiment 3

[0031] Take a raw tungsten plate with a thickness of 0.2mm, use 240# water sandpaper to grind the surface of the raw tungsten plate, and then use 1%NaOH+4%K 2 CO 3 +4% KCLO 3 + Yu H 2 O electrolyte, polish for 10min; use fine grinding and rolling work rolls with roughness less than 0.1μm; roll preheating temperature is 120℃; raw tungsten plate preheating temperature is 150℃; The preheated four-high reversing rolling mill directly performs block rolling without coating graphite and other lubricating materials. The initial rolling force is 40T, and then the rolling force is gradually increased. The final rolling force is 100T. After multiple passes A thin tungsten sheet with a finished product thickness of 0.14 mm is obtained by rolling, the total processing rate is 30%, the surface is bright and consistent, and the detected surface roughness is 0.1 μm.

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Abstract

The invention relates to a rolling method of small-roughness high-gross thin tungsten sheet, pertaining to the rolling method of thin tungsten sheet. The method of the invention is characterized in that: a. surface processing of tungsten board material: the surface of tungsten board is regrinded, electrolyte of 1% NaOH + 4% K2CO3 + 4% KClO3 + H2O is adopted to polish the tungsten board for 10 to 30min; b. a regrinding and rolling roller with roughness smaller than 0.1Mum is used; c. the preheating temperature of the roller is 100 to 150 DEG C; d. the preheating temperature of the tungsten board material is 100 to 200 DEG C; e. surface processed and preheated tungsten board is directly rolled on a preheated four-roll or six-roll rolling machine, with the total processing rate controlled between 20 to 30 percent, rolling force 40T to 100T. The method of the invention can prepare thin tungsten sheets with uniform and bright surface and the surface roughness is smaller than 0.15Mum.

Description

technical field [0001] A rolling method of a thin tungsten sheet with small roughness and high brightness relates to a rolling method of a thin tungsten sheet. Background technique [0002] Thin tungsten sheets with small roughness and high brightness are used as tungsten substrates in radiotherapy CT machines and play an important role in photoelectric conversion. The roughness is required to be within 0.15μm, and the surface is consistent and bright. The traditional thin tungsten sheet rolling method is as follows: firstly, the surface of the raw tungsten sheet is coated with graphite, then block rolling is carried out in the range of 400 ° C ~ 600 ° C, and finally the surface is treated by electrolytic polishing. Due to the use of graphite as a protective and lubricating material, there are many shallow pits extruded by graphite on the surface of the thin tungsten sheet prepared by this method, so that the roughness of the tungsten sheet is greater than 0.2 μm. The brigh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/22B21B27/02B21B37/74B21B37/58B21B15/00C25F3/26
Inventor 邓自南郭让民吴建社刘宁平丁旭郭磊惠军锋张斌张永刚赵娟高国强
Owner WESTERN METAL MATERIAL
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