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A rolling method of small-coarseness high-light thin wolfram sheets

A roughness and high-brightness technology, applied in metal rolling, temperature control, metal rolling, etc., can solve problems such as the inability to reduce the roughness of tungsten sheets and poor surface consistency

Active Publication Date: 2009-03-04
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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  • A rolling method of small-coarseness high-light thin wolfram sheets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] 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, polished for 20min; using fine grinding and rolling work rolls with roughness less than 0.1μm; roll preheating temperature is 100°C; raw material tungsten plate preheating temperature is 100°C; surface treated and preheated tungsten plate is in Block rolling is carried out directly on the four-high reversing mill with preheated rolls without graphite and other lubricating materials. The rolling force is 40T in the initial stage, and then the rolling force is gradually increased, and the final rolling force is 80T. Thin tungsten sheets with a finished thickness of 0.15 mm are obtained by rolling, and the total processing rate is 25%. The surface is bright and consistent, and the surface roughness is 0.12 μm after testing.

Embodiment 2

[0015] 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, polished for 30min; using fine grinding and rolling work roll with roughness less than 0.1μm; roll preheating temperature is 150°C; raw material tungsten plate preheating temperature is 200°C; surface treated and preheated tungsten plate is in Block rolling is carried out directly on the four-high reversing mill with preheated rolls without graphite and other lubricating materials. The rolling force is 40T in the initial stage, and then the rolling force is gradually increased, and the final rolling force is 60T. A thin tungsten sheet with a thickness of 0.2mm is obtained by rolling, and the total processing rate is 20%. The surface is bright and consistent, and the surface roughness is 0.14μm after testing.

Embodiment 3

[0017] 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, polished for 10min; using fine grinding and rolling work rolls with a roughness less than 0.1μm; the preheating temperature of the rolls is 120°C; the preheating temperature of the raw tungsten plate is 150°C; the surface treated and preheated tungsten plate Block rolling is carried out directly on the four-high reversing mill with preheated rolls without graphite and other lubricating materials. The rolling force is 40T in the initial stage, and then the rolling force is gradually increased, and the final rolling force is 100T. A thin tungsten sheet with a finished thickness of 0.14 mm is obtained by rolling, and the total processing rate is 30%. The surface is bright and consistent, and the surface roughness is 0.1 μm after testing.

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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] The invention discloses a rolling method of a thin tungsten sheet with small roughness and high brightness, relating 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, which play an important role in photoelectric conversion. The roughness is required to be within 0.15 μm, and the surface is consistent and bright. The traditional thin tungsten sheet rolling method is as follows: firstly, graphite is coated on the surface of the raw tungsten sheet, then block rolling is carried out in the range of 400°C to 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, resulting in a roughness of the tungsten sheet greate...

Claims

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Application Information

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Patent Type & Authority Patents(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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