CN103641453A - Toughened aluminum oxide ceramic thermal insulation piece, and preparation technology of toughened aluminum oxide ceramic thermal insulation piece, and application of toughened aluminum oxide ceramic heat piece in extruding cylinder - Google Patents
Toughened aluminum oxide ceramic thermal insulation piece, and preparation technology of toughened aluminum oxide ceramic thermal insulation piece, and application of toughened aluminum oxide ceramic heat piece in extruding cylinder Download PDFInfo
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- CN103641453A CN103641453A CN201310610324.2A CN201310610324A CN103641453A CN 103641453 A CN103641453 A CN 103641453A CN 201310610324 A CN201310610324 A CN 201310610324A CN 103641453 A CN103641453 A CN 103641453A
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Abstract
The invention discloses a toughened aluminum oxide ceramic thermal insulation piece, a preparation technology of the toughened aluminum oxide ceramic thermal insulation piece, and an application of the toughened aluminum oxide ceramic heat piece in an extruding cylinder. The toughened aluminum oxide ceramic thermal insulation piece is characterize by being prepared from main components, namely alumina powder and yttrium-stabilized square phase zirconium oxide powder, and auxiliary material components, wherein the percentage ratios of the alumina powder and yttrium-stabilized square phase zirconium oxide in the total weight of the main components are respectively as follows: 80%-90% of Al2O3 and 10%-20% of ZrO2+Y2O3; the preparation technology comprises a burdening step, a mixing step, a ball milling step, a spray granulation step, a compression molding step and a sintering step, the prepared aluminum oxide ceramic thermal insulation piece is used for splicing a thermal insulation layer used between an outer steel sleeve and a winding steel wire of the extruding cylinder in an extruding machine. The ceramic thermal insulation piece provided by the invention has the characteristics that the cost is low, the intensity is high, the preparation method is scientific, reasonable, simple and practicable, the ceramic thermal insulation piece is convenient to implement, the remarkable characteristic is that the ceramic thermal insulation piece can bear harsh working condition environments such as high temperature and high pressure, the thermal insulation effect is good, the service life is long, and the using reliability of the extruding cylinder is greatly improved.
Description
Technical field:
The present invention relates to extrusion machine accessory technical field, is its preparation technology of reinforced alumina ceramic heat shield and the application in container thereof specifically, is mainly used in 3.6 ten thousand tons of vertical extruder.
Background technology:
3.6 ten thousand tons of vertical extruder are to produce the equipment of heavy caliber seamless steel pipe, wherein container is most important hot extrusion parts in extruding weldless steel tube process, in the course of the work, not only to bear huge racking stress, but also to bear the high temperature action of 800 ℃ of left and right, Working environment is extremely severe.So the design of container, selection and processing and manufacturing are particularly important.
Container is comprised of interior steel bushing 1, outer steel sleeve 2 generally, as shown in Figure 1.Between interior steel bushing 1 and outer steel sleeve 2, adopt shrink-fit, to increase the effect of resisting built-in compressive stress.Result of finite element shows: because container is at high temperature to work, so the intensity of steel has certain decline, add that stress that shrink-fit increases can not guarantee the security of extrusion process completely.For this reason, the way that has proposed winding steel wire 4 on outer steel sleeve further increases the scheme of stress.Under cold conditions, calculation result shows that its intensity reaches safety standards completely; But because winding steel wire 4 directly contacts with outer steel sleeve 2, so internal heat passes to winding steel wire 4 very soon, cause winding steel wire semi-finals degree sharply to decline, greatly reduce the reliability that container is used.
Summary of the invention:
The object of the invention is to overcome the deficiency of above-mentioned prior art, and a kind of reinforced alumina ceramic heat shield is provided.
Another object of the present invention is to provide the preparation technology of reinforced alumina ceramic heat shield.
A further object of the present invention is to provide the purposes of reinforced alumina ceramic heat shield.
The present invention mainly solves the low problem of container work reliability of existing extrusion machine.
Technical scheme of the present invention is: a kind of reinforced alumina ceramic heat shield, and its special character is, by aluminum oxide powder and yttrium, stablizes tetragonal phase zirconium oxide powder and auxiliary material component is formulated; Aluminum oxide powder and yttrium are stablized the per distribution ratio that tetragonal phase zirconium oxide powder accounts for respectively main ingredient gross weight: Al
2o
380% ~ 90%, ZrO
2+ Y
2o
310% ~ 20%.
Further, described auxiliary material comprises Sudan Gum-arabic, water, cakingagent and defrother.
Further, the amount of described Sudan Gum-arabic be main ingredient aluminum oxide powder and yttrium stablize tetragonal phase zirconium oxide powder gross weight 10%.
Further, the amount of described water is, Sudan Gum-arabic: water is 8% ~ 10%.
The preparation technology of reinforced alumina ceramic heat shield of the present invention, its special character is, comprises batching, batch mixing, ball milling, mist projection granulating, compression molding, sintering circuit step, after described batching, batch mixing, ball milling, powder adopts spray granulation granulation; Described compression molding operation pressure is 15 ~ 20MPa; Described sintering circuit temperature is 1650 ℃ ~ 1680 ℃, and soaking time is 2.5 ~ 3h.
Reinforced alumina ceramic heat shield of the present invention, is spliced into thermofin, between outer steel sleeve and winding steel wire for extrusion machine container.
Reinforced alumina ceramic heat shield of the present invention, wherein alumina powder performance need reach following standard: Al
2o
3content>=99.5%, foreign matter content≤0.5%, α phase percentage composition>=95%, true density>=3.97g/cm
3, median size d50≤1 μ m; Wherein in foreign matter content, SiO
2≤ 0.06%, Fe
2o
3≤ 0.03%, Na
2o≤0.03%.
A kind of reinforced alumina ceramic heat shield of the present invention and compared with the prior art preparation technology has outstanding substantive distinguishing features and remarkable advantage is as follows: the performance of 1, utilizing aluminum oxide and zirconia ceramics to have separately, adopt aluminum oxide and Zirconium oxide ceramic composite material, obtain the ceramic insulation sheet of bi-material over-all properties; 2, in preparation technology, after batch mixing, powder adopts mist projection granulating method, its objective is that the slip being made into fine powder is after mist projection granulating, becomes and has some subparticles to reunite at the ball-type small agglomerates of, there is excellent mobility, to improve powder compacting and sintering character; 3, ceramic insulation sheet has that cost is low, intensity is high, preparation method is scientific and reasonable, simple, is convenient to the features such as enforcement, and its distinguishing feature is to bear the severe environment such as High Temperature High Pressure, and good heat-insulation effect, long service life; 4, greatly improved the reliability that container is used.
Accompanying drawing explanation:
Fig. 1 is existing container structural representation;
Fig. 2 is container structural representation of the present invention;
Fig. 3 is embodiment of the present invention process flow diagram.
Drawing explanation:
1 interior steel bushing, 2 outer cylinder sheaths, 3 ceramic thermal barrier layers, 4 winding steel wire.
Embodiment:
Below in conjunction with embodiment, the invention will be further described.
The above-mentioned heat shield of alumina-ceramic one by one making is spliced into thermofin 3, on the container being formed by interior steel bushing 1, outer steel sleeve 2 and winding steel wire 4, between outer steel sleeve 2 and winding steel wire 4, installs thermofin 3 additional.
The above-mentioned heat shield of alumina-ceramic one by one making is spliced into thermofin 3, on the container being formed by interior steel bushing 1, outer steel sleeve 2 and winding steel wire 4, between outer steel sleeve 2 and winding steel wire 4, installs thermofin 3 additional.
Embodiment 3, referring to Fig. 2,3, take 277 grams of 6%(weight percents) yttrium stablizes tetragonal phase zirconium oxide powder, 2500 grams of high-purity alumina powders, add aluminum oxide powder and yttrium to stablize the Sudan Gum-arabic of tetragonal phase zirconium oxide powder gross weight 10%, then add water, Sudan Gum-arabic/water weight ratio is 10%; Fully mix and pass through ball milling granulation, the slip that ball milling bucket is mixed proceeds to mixing tank, and in mixing tank, add with ball milling bucket in the alumina balls of equal in quality; And by the PVA cakingagent colloidal sol that adds conventional amount used, during batch mixing, in mixing tank, liquid level stays and accounts for 1/3 long space of bucket apart from bucket footpath portion, mixing time is 24h; Slip is squeezed into agitation vat after filtering, add the defrother n-Octanol of conventional amount used, stir 8～12h, with bubble removing; Then adopt spray granulation to carry out granulation; Moulding in 60T oil press, pressure-controlling is at 20MPa; The blank of forming is packed in ultra-high-temperature tunnel kiln stove, and the highest sintering temperature is 1680 ℃, and insulation 2.5h, lowers the temperature naturally, obtains product after cooling; After cold working, obtain again finished product reinforced alumina ceramic heat shield.
The above-mentioned heat shield of alumina-ceramic one by one making is spliced into thermofin 3, on the container being formed by interior steel bushing 1, outer steel sleeve 2 and winding steel wire 4, between outer steel sleeve 2 and winding steel wire 4, installs thermofin 3 additional.
These are only preferred embodiment of the present invention, be not used for limiting practical range of the present invention; If do not depart from the spirit and scope of the present invention, the present invention is modified or is equal to replacement, all should be encompassed in the middle of the protection domain of the claims in the present invention.
Claims (6)
1. reinforced alumina ceramic heat shield, is characterized in that, by main ingredient aluminum oxide powder and yttrium, stablizes tetragonal phase zirconium oxide powder and auxiliary material component is formulated; Aluminum oxide powder and yttrium are stablized the per distribution ratio that tetragonal phase zirconium oxide powder accounts for respectively main ingredient gross weight: Al
2o
380% ~ 90%, ZrO
2+ Y
2o
310% ~ 20%.
2. reinforced alumina ceramic heat shield according to claim 1, is characterized in that, described auxiliary material comprises Sudan Gum-arabic, water, cakingagent and defrother.
3. reinforced alumina ceramic heat shield according to claim 2, is characterized in that, the amount of described Sudan Gum-arabic be main ingredient aluminum oxide powder and yttrium stablize tetragonal phase zirconium oxide powder gross weight 10%.
4. reinforced alumina ceramic heat shield according to claim 2, is characterized in that, the amount of described water is, Sudan Gum-arabic: water is 8% ~ 10%.
5. the preparation technology of arbitrary reinforced alumina ceramic heat shield of the claims 1-4, it is characterized in that, comprise batching, batch mixing, ball milling, mist projection granulating, compression molding, sintering circuit step, after described batching, batch mixing, ball milling, powder adopts spray granulation granulation; Described compression molding operation pressure is 15 ~ 20MPa; Described sintering circuit temperature is 1650 ℃ ~ 1680 ℃, and soaking time is 2.5 ~ 3h.
6. adopt arbitrary reinforced alumina ceramic heat shield of the claims 1-4, be spliced into thermofin, between outer steel sleeve and winding steel wire for extrusion machine container.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310610324.2A CN103641453A (en) | 2013-11-27 | 2013-11-27 | Toughened aluminum oxide ceramic thermal insulation piece, and preparation technology of toughened aluminum oxide ceramic thermal insulation piece, and application of toughened aluminum oxide ceramic heat piece in extruding cylinder |
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|---|---|---|---|
| CN201310610324.2A CN103641453A (en) | 2013-11-27 | 2013-11-27 | Toughened aluminum oxide ceramic thermal insulation piece, and preparation technology of toughened aluminum oxide ceramic thermal insulation piece, and application of toughened aluminum oxide ceramic heat piece in extruding cylinder |
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|---|---|
| CN103641453A true CN103641453A (en) | 2014-03-19 |
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ID=50246788
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104193307A (en) * | 2014-08-22 | 2014-12-10 | 淄博市周村磊宝耐火材料有限公司 | Preparation method of low-cost zirconium dioxide toughened alumina ceramic granular powder |
| CN108286031A (en) * | 2018-04-04 | 2018-07-17 | 中国兵器工业第五二研究所烟台分所有限责任公司 | A kind of graphite liner plate of ceramic embedded pipe and preparation method thereof |
| CN109336565A (en) * | 2018-12-24 | 2019-02-15 | 焦作市德邦科技有限公司 | A kind of preparation method of Zirconia reinforced alumina wear-resistant ceramic |
| CN113431694A (en) * | 2021-06-29 | 2021-09-24 | 潍柴动力股份有限公司 | Cylinder sleeve and preparation method thereof |
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| CN101800140A (en) * | 2010-01-19 | 2010-08-11 | 咸阳澳华瓷业有限公司 | Outer pipe shell material containing tetragonal zirconia and preparation method thereof |
| CN102603272A (en) * | 2012-03-08 | 2012-07-25 | 江汉大学 | Ceramic material and preparation method thereof |
| CN102795842A (en) * | 2012-08-09 | 2012-11-28 | 广东潮流集团有限公司 | Ceramic material and preparation method thereof |
| CN102850042A (en) * | 2011-06-27 | 2013-01-02 | 上海敬开德精密陶瓷有限公司 | Phase transformation toughened ceramic material and its ceramic member manufacturing process |
| CN103382099A (en) * | 2013-07-12 | 2013-11-06 | 河海大学 | Sandwich structure bulletproof ceramic sheet and low temperature sintering preparation method |
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2013
- 2013-11-27 CN CN201310610324.2A patent/CN103641453A/en active Pending
Patent Citations (5)
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|---|---|---|---|---|
| CN101800140A (en) * | 2010-01-19 | 2010-08-11 | 咸阳澳华瓷业有限公司 | Outer pipe shell material containing tetragonal zirconia and preparation method thereof |
| CN102850042A (en) * | 2011-06-27 | 2013-01-02 | 上海敬开德精密陶瓷有限公司 | Phase transformation toughened ceramic material and its ceramic member manufacturing process |
| CN102603272A (en) * | 2012-03-08 | 2012-07-25 | 江汉大学 | Ceramic material and preparation method thereof |
| CN102795842A (en) * | 2012-08-09 | 2012-11-28 | 广东潮流集团有限公司 | Ceramic material and preparation method thereof |
| CN103382099A (en) * | 2013-07-12 | 2013-11-06 | 河海大学 | Sandwich structure bulletproof ceramic sheet and low temperature sintering preparation method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104193307A (en) * | 2014-08-22 | 2014-12-10 | 淄博市周村磊宝耐火材料有限公司 | Preparation method of low-cost zirconium dioxide toughened alumina ceramic granular powder |
| CN108286031A (en) * | 2018-04-04 | 2018-07-17 | 中国兵器工业第五二研究所烟台分所有限责任公司 | A kind of graphite liner plate of ceramic embedded pipe and preparation method thereof |
| CN109336565A (en) * | 2018-12-24 | 2019-02-15 | 焦作市德邦科技有限公司 | A kind of preparation method of Zirconia reinforced alumina wear-resistant ceramic |
| CN113431694A (en) * | 2021-06-29 | 2021-09-24 | 潍柴动力股份有限公司 | Cylinder sleeve and preparation method thereof |
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Application publication date: 20140319 |