CN109731639A - A method of piercing plug for seamless steel tubes is manufactured with silicon nitride ceramics - Google Patents
A method of piercing plug for seamless steel tubes is manufactured with silicon nitride ceramics Download PDFInfo
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Abstract
A method of piercing plug for seamless steel tubes being manufactured with silicon nitride ceramics, belongs to seamless steel pipe puncturing technique field, is characterized in that implementation steps are as follows:<1>raw material proportioning: ɑ-Si3N4For 85% ~ 90%, Y2O3It is 2% ~ 3%, Al for 1% ~ 3%, TiC2O3For 1% ~ 3%, Li2CO3For 0.5% ~ 1%, ZrO2It is 1% ~ 3%, kaolin is that 1% ~ 3%, BN fiber is 0.5%, CeO2It is 1% ~ 3% for 0.5% ~ 3%, BaO；<2>ball milling: ball milling is carried out using planetary ball mill；<3>dry: powder after ball milling 120 DEG C constant temperature drying 5 hours in an oven；<4>it is granulated: 2% PVA solution being uniformly mixed with is added dropwise, pours into agate mortar ground and mixed and is granulated；<5>it is sieved: sieving with 100 mesh sieve；<6>aging: be put into valve bag it is closed it is aging for 24 hours；<7>base: powder is installed in punching block, carries out dry-pressing formed, the isostatic cool pressing pressure maintaining 3min under 260MPa；<8>high temperature sintering: finished product of coming out of the stove.Advantage is the performance wear-resistant, resistant to high temperature for improving perforating head, to improve the service life of top.
Description
Technical field
The invention belongs to seamless steel pipe puncturing technique fields, and in particular to a kind of to manufacture seamless steel pipe with silicon nitride ceramics and wear
The method of hole top.
Background technique
During producing seamless steel pipe, the working performance of perforating head has very big shadow to the production efficiency of seamless steel pipe
It rings.The working performance for improving top has great significance to the perforation effect for improving seamless steel pipe with production cost is reduced.How
The service life for improving perforating head is always emphasis concerned by people.It is usually to improve system for the method for improving perforating head
Make technique and two kinds of development and application new material.People are nonetheless focused upon conventional metals for the investigation of materials of perforating head at this stage
Material or the various composite materials developed based on conventional metals.But there are no solve top in the building ring of high temperature so far
The Problem of Failure occurred in border, in seamless steel pipe perforation process, perforating head fail the main reason for be nose high temperature failure
And wear-out failure.
Chinese patent application Publication No. CN104619434A discloses a kind of manufacturer of piercing plug for seamless steel tubes
Method.It is to be coated Co or Co based alloy on base material metal surface, and then the oxide layer being made of Co system oxide is generated in coating,
To improve intensity, hardness and the wearability of perforating head in a certain range, but improvement has in terms of high temperature failure
Limit.
A kind of manufacturing method of perforating head is disclosed in Chinese patent application Publication No. CN103160749A.The invention
Piercing plug for seamless steel tubes component and mass percent are as follows: carbon are as follows: 0.30%-0.42%, chromium are as follows: 11.5%-
12.4%, manganese are as follows: 1.5%-2.0%, molybdenum are as follows: 0.1%-0.5%, vanadium are as follows: 0.4%-0.6%, rhenium are as follows: 0.2%-0.3%,
Manufacturing method is the following steps are included: ingredient, forging, annealing heat-treatment, surface oxidation treatment.Although the method improves seamless steel
Pipe perforating head hardness and moulding, but the working environment of perforating head is quite severe, its wearability, resistance in long-term work
High-temperature behavior improvement is not very good.
Summary of the invention
The object of the present invention is to provide a kind of methods for manufacturing piercing plug for seamless steel tubes with silicon nitride ceramics, can be effective
Overcome disadvantage of the existing technology, the invention is realized in this way, it is characterised in that specific implementation step is as follows:
<1>raw material form: ɑ-Si3N4Sub-micron powder is 85%~90%, Y2O3Sub-micron powder is 1%~3%,
TiC sub-micron powder is 2%~3%, Al2O3Fine grain powder is 1%~3%, Li2CO3Sub-micron powder be 0.5%~
1%, ZrO2Sub-micron powder is 1%~3%, and kaolin is that 1%~3%, BN fiber is 0.5%, CeO2It is 0.5%~3%,
BaO is 1%~3%；
<2>ball milling ball milling: is carried out to said components using planetary ball mill.Material quality of grinding balls is silicon nitride, is selectedAbrading-ball andThe ratio of abrading-ball is 1:6, and the revolving speed of ball mill is 280r/min, every 20 minutes alternatings of positive and negative rotation
Once, ball, material, dehydrated alcohol mass ratio be 3:2:1, Ball-milling Time 8h；
<3>dry: powder after ball milling 120 DEG C constant temperature drying 5 hours in an oven；
<4>it is granulated: dried mixture is taken out from baking oven, 2% PVA solution being uniformly mixed with is added dropwise,
It pours into agate mortar and is fully ground mixing and be granulated；
<5>it is sieved: and then sieve with 100 mesh sieve；
<6>aging: be put into valve bag it is closed it is aging for 24 hours；
<7>base: by powder by being fitted into punching block after the completion of being granulated, being aging, progress is dry-pressing formed, cold under 260MPa
Equal static pressure pressure maintaining 3min, measures and weighs to the biscuit size prepared；
<8>high temperature sintering: green body is put into the crucible for being coated with boron nitride, then crucible is placed in gas pressure sintering furnace.First
It vacuumizes, then changes nitrogen twice, be then warming up to 1450 DEG C with the speed of 20 DEG C/min, be passed through nitrogen to 2MPa, keep the temperature 3h, after
It is continuous to be warming up to set temperature, 3h is kept the temperature, is then cooled down, is vented, comes out of the stove.
Advantages of the present invention and good effect are: improving the abrasion resistance properties and high temperature resistance of perforating head.Again
Further sintering process is optimized and improved, consistency can reach >=95%, Vickers hardness >=1550, bending strength >=
820MPa。
Detailed description of the invention
Fig. 1 is the compression moulding schematic diagram in punching block.
Fig. 2 is silicon nitride ceramics piercing plug for seamless steel tubes schematic diagram.
Fig. 3 is the top view of silicon nitride ceramics piercing plug for seamless steel tubes.
Fig. 4 is silicon nitride ceramics piercing plug for seamless steel tubes application effect schematic diagram.
In figure: garter spring 7- pin plug 8- silicon nitride pottery under garter spring 6- on 1- former 2- core model 3- sleeve 4- pressure head 5-
Porcelain comes directly towards 14 fixing screws of 9- through-hole 10- keyway 11- plug 12- key 13- threaded hole
Specific embodiment
Embodiment 1
1. raw material proportioning: ɑ-Si3N4Sub-micron powder is 85%, Y2O3Sub-micron powder is that 2%, TiC sub-micron powder is
2%, Al2O3Fine grain powder is 2%, Li2CO3Sub-micron powder is 1%, ZrO2Sub-micron powder is 2%, kaolin 2%,
BaO is 3%, CeO2It is 0.5% for 0.5%, BN fiber；
2. ball milling: carrying out ball milling to said components using planetary ball mill.Material quality of grinding balls is silicon nitride, is selectedAbrading-ball andThe ratio of abrading-ball is 1:6, and the revolving speed of ball mill is 280r/min, every 20 minutes alternatings of positive and negative rotation
Once, ball, material, dehydrated alcohol mass ratio be 3:2:1, Ball-milling Time 8h；
3. drying: powder after ball milling 120 DEG C constant temperature drying 5 hours in an oven；
4. being granulated: dried mixture being taken out from baking oven, 2% PVA solution being uniformly mixed with is added dropwise,
Enter agate mortar and be fully ground mixing to be granulated；
5. sieving: and then sieve with 100 mesh sieve；
6. aging: be put into valve bag it is closed it is aging for 24 hours；
8. base: as shown in Figure 1, the powder after will be aging is fitted into punching block, progress is dry-pressing formed, cold under 260MPa
Equal static pressure pressure maintaining 3min, measures and weighs to the biscuit size prepared；
9. high temperature sintering: green body being put into the crucible for being coated with boron nitride, is placed in gas pressure sintering furnace.First vacuumize, then
Nitrogen twice is changed, is then warming up to 1450 DEG C with the speed of 20 DEG C/min, nitrogen is passed through to 2MPa, keeps the temperature 3h, be continuously heating to
1750 DEG C, 3h is kept the temperature, is then cooled down, is vented, come out of the stove.
Embodiment 2
1. raw material proportioning: ɑ-Si3N4Sub-micron powder is 87%, Y2O3Sub-micron powder is that 2%, TiC sub-micron powder is
2%, Al2O3Fine grain powder is 2%, Li2CO3Sub-micron powder is 0.5%, ZrO2Sub-micron powder is 2%, and kaolin is
2%, BaO 1%, CeO2It is 0.5% for 1%, BN fiber；
2. ball milling: carrying out ball milling to said components using planetary ball mill.Material quality of grinding balls is silicon nitride, is selectedAbrading-ball andThe ratio of abrading-ball is 1:6, and the revolving speed of ball mill is 280r/min, every 20 minutes alternatings of positive and negative rotation
Once, ball, material, dehydrated alcohol mass ratio be 3:2:1, Ball-milling Time 8h；
3. drying: powder after ball milling 120 DEG C constant temperature drying 5 hours in an oven；
4. being granulated: dried mixture being taken out from baking oven, 2% PVA solution being uniformly mixed with is added dropwise,
Enter agate mortar and be fully ground mixing to be granulated；
5. sieving: and then sieve with 100 mesh sieve；
6. aging: be put into valve bag it is closed it is aging for 24 hours；
8. base: as shown in Figure 1, the powder after will be aging is fitted into punching block, progress is dry-pressing formed, cold under 260MPa
Equal static pressure pressure maintaining 3min, measures and weighs to the biscuit size prepared；
9. high temperature sintering: green body being put into the crucible for being coated with boron nitride, is placed in gas pressure sintering furnace.First vacuumize, then
Nitrogen twice is changed, is then warming up to 1450 DEG C with the speed of 20 DEG C/min, nitrogen is passed through to 2MPa, keeps the temperature 3h, be continuously heating to
1750 DEG C, 3h is kept the temperature, is then cooled down, is vented, come out of the stove.
Embodiment 3
1. raw material proportioning: ɑ-Si3N4Sub-micron powder is 90%, Y2O3Sub-micron powder is 1.5%, TiC sub-micron powder
For 1.5%, Al2O3Fine grain powder is 1%, Li2CO3Sub-micron powder is 0.5%, ZrO2Sub-micron powder is 1%, kaolin
For 1.5%, BaO 1%, CeO2It is 0.5% for 1.5%, BN fiber；
2. ball milling: carrying out ball milling to said components using planetary ball mill.Material quality of grinding balls is silicon nitride, is selectedAbrading-ball andThe ratio of abrading-ball is 1:6, and the revolving speed of ball mill is 280r/min, every 20 minutes alternatings of positive and negative rotation
Once, ball, material, dehydrated alcohol mass ratio be 3:2:1, Ball-milling Time 8h；
3. drying: powder after ball milling 120 DEG C constant temperature drying 5 hours in an oven；
4. being granulated: dried mixture being taken out from baking oven, 2% PVA solution being uniformly mixed with is added dropwise,
Enter agate mortar and be fully ground mixing to be granulated；
5. sieving: and then sieve with 100 mesh sieve；
6. aging: be put into valve bag it is closed it is aging for 24 hours；
8. base: as shown in Figure 1, the powder after will be aging is fitted into punching block, progress is dry-pressing formed, cold under 260MPa
Equal static pressure pressure maintaining 3min, measures and weighs to the biscuit size prepared；
9. high temperature sintering: green body being put into the crucible for being coated with boron nitride, is placed in gas pressure sintering furnace.First vacuumize, then
Nitrogen twice is changed, is then warming up to 1450 DEG C with the speed of 20 DEG C/min, nitrogen is passed through to 2MPa, keeps the temperature 3h, be continuously heating to
1750 DEG C, 3h is kept the temperature, is then cooled down, is vented, come out of the stove.
The sintered density of the product of above-described embodiment 1-3, Vickers hardness and bending strength are as shown in table 1 below.
Table 1
High temperature resistant of the present invention, wear resistance are strong seen from table 1.
Claims (1)
1. a kind of method for manufacturing piercing plug for seamless steel tubes with silicon nitride ceramics, it is characterised in that implementation steps are as follows:
<1>raw material form: ɑ-Si3N4Sub-micron powder is 85% ~ 90%, Y2O3Sub-micron powder is 1% ~ 3%, TiC sub-micro
Rice flour material is 2% ~ 3%, Al2O3Fine grain powder is 1% ~ 3%, Li2CO3Sub-micron powder is 0.5% ~ 1%, ZrO2Sub-micron
Powder is 1% ~ 3%, and kaolin is that 1% ~ 3%, BN fiber is 0.5%, CeO2It is 1% ~ 3% for 0.5% ~ 3%, BaO；
<2>ball milling: ball milling is carried out to said components using planetary ball mill, Material quality of grinding balls is silicon nitride, selects 10mm abrading-ball
Ratio with 5mm abrading-ball is 1:6, and the revolving speed of ball mill is 280r/min, positive and negative rotation every 20 minutes alternately primary, ball, material, nothings
The mass ratio of water-ethanol is 3:2:1, Ball-milling Time 8h；
<3>dry: powder after ball milling 120 DEG C of constant temperature drying 5h in an oven；
<4>it is granulated: dried mixture is taken out from baking oven, 2% PVA solution being uniformly mixed with is added dropwise, pours into Ma
Nao mortar is fully ground mixing and is granulated；
<5>it is sieved: and then sieve with 100 mesh sieve；
<6>aging: be put into valve bag it is closed it is aging for 24 hours；
<7>base: by powder by being fitted into punching block after the completion of being granulated, being aging, progress is dry-pressing formed, cold etc. under 260 MPa
3 min of static pressure pressure maintaining is measured and is weighed to the biscuit size prepared；
<8>high temperature sintering: green body is put into the crucible for being coated with boron nitride, then crucible is placed in gas pressure sintering furnace, is first taken out true
Sky, then nitrogen twice is changed, 1450 DEG C then are warming up to the speed of 20 DEG C/min, nitrogen is passed through to 2MPa, 3h is kept the temperature, after of continuing rising
Temperature keeps the temperature 3h, then cools down, be vented, come out of the stove to set temperature.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110590378A (en) * | 2019-09-19 | 2019-12-20 | 太原科技大学 | Preparation method of homogenized and distributed silicon nitride ceramic material |
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| DE4432182A1 (en) * | 1993-09-13 | 1995-03-16 | Isuzu Motors Ltd | Composite ceramic and process for its production |
| JPH07223866A (en) * | 1994-02-15 | 1995-08-22 | Ube Ind Ltd | Silicon nitride-based composite ceramic and production thereof |
| CN103011837A (en) * | 2013-01-05 | 2013-04-03 | 冷水江市明玉陶瓷工具有限责任公司 | Silicon nitride composite ceramic material with high strength and high oxidation resistance |
| CN105859301A (en) * | 2016-04-05 | 2016-08-17 | 盐城工学院 | Silicon nitride ceramic and preparation method thereof |
| CN107673765A (en) * | 2017-09-18 | 2018-02-09 | 上海大学 | The preparation method of silicon nitride ceramics |
| CN108675797A (en) * | 2018-06-27 | 2018-10-19 | 南京理工大学 | Silicon nitride matrix composite ceramic material and its microwave sintering preparation method |
| CN109053193A (en) * | 2018-07-23 | 2018-12-21 | 太原科技大学 | A kind of silicon nitride ceramics nozzle and preparation method thereof |
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2018
- 2018-12-25 CN CN201811595885.9A patent/CN109731639A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4432182A1 (en) * | 1993-09-13 | 1995-03-16 | Isuzu Motors Ltd | Composite ceramic and process for its production |
| JPH07223866A (en) * | 1994-02-15 | 1995-08-22 | Ube Ind Ltd | Silicon nitride-based composite ceramic and production thereof |
| CN103011837A (en) * | 2013-01-05 | 2013-04-03 | 冷水江市明玉陶瓷工具有限责任公司 | Silicon nitride composite ceramic material with high strength and high oxidation resistance |
| CN105859301A (en) * | 2016-04-05 | 2016-08-17 | 盐城工学院 | Silicon nitride ceramic and preparation method thereof |
| CN107673765A (en) * | 2017-09-18 | 2018-02-09 | 上海大学 | The preparation method of silicon nitride ceramics |
| CN108675797A (en) * | 2018-06-27 | 2018-10-19 | 南京理工大学 | Silicon nitride matrix composite ceramic material and its microwave sintering preparation method |
| CN109053193A (en) * | 2018-07-23 | 2018-12-21 | 太原科技大学 | A kind of silicon nitride ceramics nozzle and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110590378A (en) * | 2019-09-19 | 2019-12-20 | 太原科技大学 | Preparation method of homogenized and distributed silicon nitride ceramic material |
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