CN1785542A - Rolling method of thin tungiten plate - Google Patents
Rolling method of thin tungiten plate Download PDFInfo
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- CN1785542A CN1785542A CN 200510132733 CN200510132733A CN1785542A CN 1785542 A CN1785542 A CN 1785542A CN 200510132733 CN200510132733 CN 200510132733 CN 200510132733 A CN200510132733 A CN 200510132733A CN 1785542 A CN1785542 A CN 1785542A
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Abstract
A technology for rolling thin tungsten sheet used as X-ray shielding material of CT machine includes such steps as heating the raw tungsten plate to 180-220 deg.C, spraying the graphite powder on its surface, baking for 20-30 min, beating and rolling. Its advantages are high size precision and high adhesion between graphite and tungsten sheet.
Description
Technical field
A kind of milling method of thin tungiten plate relates to a kind of processing method of tungsten sheet, especially for the rolling processing method of the employed high-precision tungsten piece of CT machine X-ray shielding material.
Technical background
The employed tungsten sheet of CT machine X-ray shielding material is thickness 0.1～0.2mm, the high accuracy material of dimensional tolerance ± 0.01mm.At present, the tungsten sheet thickness deviation that general processing technology is prepared is ± 10%, its thickness deviation of tungsten sheet that is 0.2mm is ± 0.02mm, and CT machine core component---collimater shadow shield need with ultra-thin its thickness deviation of high-precision tungsten sheet material must reach ± 5%, can guarantee the stable of the X ray signal that detects, obtain high-resolution image.How to make tungsten sheet thermal processing distortion even, and easily processing of surface, not causing that or not is the key problem that guarantees tolerance that the surface is pressed into, the selection of lubriation material and method is all very important.
Summary of the invention
Purpose of the present invention is exactly in order to overcome the deficiency that above-mentioned prior art exists, to provide a kind of high manufacturing accuracy and better surface quality of guaranteeing to be used for the milling method of thin tungiten plate.
The objective of the invention is to be achieved through the following technical solutions.
A kind of milling method of thin tungiten plate, it is characterized in that at first tungsten sheet blanket being heated to 180 ℃-220 ℃, again vaporific graphite milk powder evenly is sprayed on the tungsten sheet, the insulation oven dry formed the graphite bisque of 10 μ m～20 μ m thickness in 20-30 minute, be heated to rolling temperature again and be rolled, working modulus is 60%.
The milling method of a kind of thin tungiten plate of the present invention is characterized in that the graphite powder that sprays is by the aquadag spray gun spraying of packing on tungsten sheet blanket.
The milling method of a kind of thin tungiten plate of the present invention is characterized in that the aquadag that sprays is that the employing trade mark is the superfine graphite powder of S-1B, presses graphite: the volume ratio preparation of water=1: 4-6.
Method of the present invention, the newborn tungsten sheet blanket that it is characterized in that graphite spraying carry out working modulus be 60% rolling after, soda acid is carried out on tungsten sheet surface washes, remove residual graphite, repeat again to process after the graphite spraying milk powder process.
Method of the present invention, the rolling processing temperature that it is characterized in that the tungsten sheet are 600 ℃～900 ℃.
Method of the present invention, the aquadag of configuration are that concentration is adjusted according to processing tungsten sheet stack pile difference, and the tungsten sheet thickness of general processing is big, and the ratio of the water of aquadag is little; The tungsten sheet thickness of processing is little, and the ratio of the water of aquadag is big.The bake out temperature of spraying tungsten sheet can not be too high, be advisable with 200 ℃ ± 20 ℃, otherwise that aquadag combine with tungsten sheet surface is not tight, causes bubbling, do not reach and lubricate the purpose of processing.Usually aquadag: water=1: 4 (volume ratio) prescription can be used for producing the tungsten sheet of thickness, aquadag from 0.5mm～1.0mm: the prescription of water=1: 6 (volume ratio) can be used for producing the tungsten sheet of thickness from 0.1mm～0.3mm.Tungsten sheet to different-thickness is heated earlier, and the spray gun of again aquadag for preparing being packed into begins spraying after teetertottering evenly, because of the graphite powder of ejection is vaporific, so spray gun should have the about 200mm～300mm of distance limit to be advisable apart from tungsten sheet surface.For the good tungsten sheet upset oven dry in 200 ℃ ± 20 ℃ temperature environment still of spray, time is approximately 20～30 minutes, the tungsten sheet that has equadag coating that must guard against oven dry is when carrying out following process, place it in earlier on the homemade hydrogen nozzle heating furnace and toasted 1～2 minute, be heated to rolling temperature again and carry out processing and lubrication.The graphite on tungsten sheet top layer influences dimensional tolerance control and surface quality control through repeatedly toasting and with the materials processing distortion, can producing sheet and come off.When the working modulus of tungsten sheet reaches 60% left and right sides usually, should stop processing, soda acid be carried out on tungsten sheet surface wash, remove residual graphite, spraying is used again again.Repeat above-mentioned technical process so repeatedly, just the degree that the dimensional tolerance and the surface quality of tungsten sheet can be controlled to requirement.All sprayings and process all adopt hot-working, and temperature is respectively: 200 ℃ ± 20 ℃ of spraying/bakings, 600 ℃～900 ℃ of hot-working.Coating is controlled at about 60% all the time with the deformation processing rate of tungsten sheet.
Method of the present invention provides the even good lubricant coating in a kind of tungsten sheet process, has solved the adverse effect of lubricant coating for control of tungsten sheet tolerance and surface quality improvement.Make aquadag be increased to about 60% from about 40%, make surface roughness can reach 1 μ m～2 μ m from the come off working modulus of bearing of tungsten sheet surface sheet.Dimensional tolerance reaches ± 0.01mm.Effectively improve the bond strength on graphite and tungsten sheet surface, can produce CT machine superhigh precision tungsten sheet in batches.
The specific embodiment
A kind of milling method of thin tungiten plate, it is characterized in that at first tungsten sheet blanket being heated to 180 ℃-220 ℃, again vaporific graphite milk powder evenly is sprayed on the tungsten sheet, the insulation oven dry formed the graphite bisque of 10 μ m～20 μ m thickness in 20-30 minute, be heated to rolling temperature again and be rolled, working modulus is 60%.The graphite powder that sprays on tungsten sheet blanket is by pack into spray gun spraying of aquadag.The aquadag that adopts spraying is that the employing trade mark is the superfine graphite powder of S-1B, presses graphite: the volume ratio preparation of water=1: 4-6.The newborn tungsten sheet blanket of graphite spraying carry out working modulus be 60% rolling after, soda acid is carried out on tungsten sheet surface washes, remove residual graphite, repeat again to process after the graphite spraying milk powder process.The processing temperature of tungsten sheet is 600 ℃～900 ℃.
Embodiment 1
Adopting the trade mark is the superfine graphite powder of S-1B, press graphite: the formulated aquadag of water=1: 4 (volume ratio), get the tungsten sheet of thickness 0.9mm, tungsten is levied be heated to 180 ℃, be sprayed on tungsten sheet on and oven dry with spray gun aquadag, form the graphite bisque of 10 μ m thickness.To the spraying after the tungsten sheet 600 ℃ of rolling processing of carrying out 60% working modulus.Obtaining tungsten sheet thickness is 0.2 ± 0.01mm, and surface quality meets the requirement of medical high-precision tungsten sheet.
Embodiment 2
Other condition is got the tungsten sheet of thickness 0.5mm with example 1, the tungsten sheet is heated to 220 ℃ carries out thermal spraying and oven dry, forms the graphite bisque of 20 μ m thickness.Tungsten sheet after the spraying is carried out carrying out the rolling processing of 60% working modulus under 800 ℃.Obtain being of a size of 0.2 ± 0.01mm, surface quality meets the requirement of medical high-precision tungsten sheet.
Embodiment 3
Get the tungsten sheet of thickness 0.4mm, adopt graphite: the prescription modulation aquadag of water=1: 6 (volume ratio).200 ℃ are carried out thermal spraying and oven dry, form the graphite bisque of 15 μ m thickness.To the spraying after the tungsten sheet 900 ℃ of rolling processing of carrying out 60% working modulus.Obtain the satisfactory medical high-precision tungsten of dimensional tolerance ± 0.01mm and surface quality sheet.
Embodiment 4
Get the tungsten sheet of thickness 0.1mm, adopt aquadag: the prescription modulation aquadag of water=1: 6 (volume ratio).180 ℃ are carried out thermal spraying and oven dry, form the graphite bisque of 18 μ m thickness.Tungsten sheet after the spraying is carried out the rolling processing of 60% working modulus.Obtain the satisfactory medical high-precision tungsten of dimensional tolerance ± 0.01mm and surface quality sheet.
Claims (5)
1. the milling method of a thin tungiten plate, it is characterized in that at first tungsten sheet blanket being heated to 180 ℃-220 ℃, again vaporific graphite milk powder evenly is sprayed on the tungsten sheet, the insulation oven dry formed the graphite bisque of 10 μ m～20 μ m thickness in 20-30 minute, be heated to rolling temperature again and be rolled, working modulus is 60%.
2. the milling method of a kind of thin tungiten plate according to claim 1 is characterized in that the graphite powder that sprays is by the aquadag spray gun spraying of packing on the tungsten sheet.
3. the milling method of a kind of thin tungiten plate according to claim 1 is characterized in that the aquadag that sprays is that the employing trade mark is the superfine graphite powder of 8-1B, presses graphite: the volume ratio preparation of water=1: 4-6.
4. the milling method of a kind of thin tungiten plate according to claim 1, the newborn tungsten sheet blanket that it is characterized in that graphite spraying carry out working modulus be 60% rolling after, soda acid is carried out on tungsten sheet surface wash, remove residual graphite, repeat again to process after the graphite spraying milk powder process.
5. the milling method of a kind of thin tungiten plate according to claim 1, the rolling processing temperature that it is characterized in that the tungsten sheet is 600 ℃～900 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510132733 CN1785542A (en) | 2005-12-28 | 2005-12-28 | Rolling method of thin tungiten plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510132733 CN1785542A (en) | 2005-12-28 | 2005-12-28 | Rolling method of thin tungiten plate |
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| Publication Number | Publication Date |
|---|---|
| CN1785542A true CN1785542A (en) | 2006-06-14 |
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| CN 200510132733 Pending CN1785542A (en) | 2005-12-28 | 2005-12-28 | Rolling method of thin tungiten plate |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100464880C (en) * | 2007-12-17 | 2009-03-04 | 西部金属材料股份有限公司 | Method for rolling small-coarseness high-light thin wolfram sheet |
| CN102389898A (en) * | 2011-11-09 | 2012-03-28 | 无锡乐普金属科技有限公司 | Rolling technology for pure tungsten sheet and device thereof |
| CN105414182A (en) * | 2015-12-29 | 2016-03-23 | 西安瑞福莱钨钼有限公司 | Rolling method of bright thin tungsten chip |
| CN106077617A (en) * | 2016-08-18 | 2016-11-09 | 中铼新材料有限公司 | A kind of manufacture method of ultra-thin high-purity rhenium paper tinsel |
-
2005
- 2005-12-28 CN CN 200510132733 patent/CN1785542A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100464880C (en) * | 2007-12-17 | 2009-03-04 | 西部金属材料股份有限公司 | Method for rolling small-coarseness high-light thin wolfram sheet |
| CN102389898A (en) * | 2011-11-09 | 2012-03-28 | 无锡乐普金属科技有限公司 | Rolling technology for pure tungsten sheet and device thereof |
| CN105414182A (en) * | 2015-12-29 | 2016-03-23 | 西安瑞福莱钨钼有限公司 | Rolling method of bright thin tungsten chip |
| CN106077617A (en) * | 2016-08-18 | 2016-11-09 | 中铼新材料有限公司 | A kind of manufacture method of ultra-thin high-purity rhenium paper tinsel |
| CN106077617B (en) * | 2016-08-18 | 2018-05-04 | 中铼新材料有限公司 | A kind of manufacture method of ultra-thin high-purity rhenium paper tinsel |
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