CN205183722U - Novel conticaster - Google Patents
Novel conticaster Download PDFInfo
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- CN205183722U CN205183722U CN201520976093.1U CN201520976093U CN205183722U CN 205183722 U CN205183722 U CN 205183722U CN 201520976093 U CN201520976093 U CN 201520976093U CN 205183722 U CN205183722 U CN 205183722U
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Abstract
The utility model discloses a novel conticaster, including the ladle, middle package, crystallizer, the secondary cooling system that connect gradually, draw the machine of rectifying, bending roll, leveling roller, flame cutting machine, the bottom of ladle is equipped with slide gate nozzle, being provided with the stopper stick in the middle package, being connected with stopper stick rod on the stopper stick, stopper stick below is provided with slide gate nozzle, its characterized in that: a N middle package, N>are connected to the ladle, 3, the volume of middle package is 36t, secondary cooling moisture is four sections, has 8 group's backing rolls. The utility model discloses having a bigger centre to contain and amassing the molten steel buffer time that can extend, the inclusion has abundant time separation come -up, keeps the liquid level stable simultaneously, can also strengthen the life of intensity of cooling, the middle package of extension and stopper stick, monitor whole continuous casting process, in time pinpoint the problems, and adjust, save the resource, increase operation rate, the qualities of the productivity ratio of casting blank with are improved.
Description
Technical field
The utility model relates to a kind of conticaster, particularly a kind of can the new high-efficiency conticaster of automatic operating, also relate to the control system of conticaster.
Background technology
High-temperature molten steel is continuously cast into the production process with certain section configuration and certain size specification strand and is called continuous casting steel machine.The equipment needed for this process of completing is continuous casting complete set of equipments.Water steel equipment, conticaster body equipment, cutting zone equipment, dummy bar collects and the mechanical-electrical-hydraulic integration of conveying equipment constitutes continuous casting steel machine core position equipment, is called conticaster traditionally.Continuous casting steel machine is maximum to steel mill's structure influence, and continuous casting is steel mill's STEELMAKING PRODUCTION major way.Continuous casting has become the major way of modernization iron and steel enterprise STEELMAKING PRODUCTION.Current continuous casting steel machine technology generally adopts for whole world Ge Changang state, and the ratio of many developed countries continuous casting steel machine reaches more than 90%, and many steel mills realize sequence casting.Realize Continuous Cast Steelmaking Plants, make iron and steel enterprise's structure there occurs great change.Because continuous casting instead of die casting and breaking down operation, instead of cogging operation, the steel product of integrated complex is developed to specialized direction; The workshop of steel plant is arranged, Reasonable Scale, and even warehouse setting, capital turnover etc., also there occurs great variety thereupon.For steel mill's structure, the impact of continuous casting steel machine is very big.
Volume due to tundish in continuous casting is smaller, and the buffer time of molten steel is short, and field trash can not fully be separated and float, and the material fire resistance used is poor, and the service life of stopper is shorter; Former cooling twice section only has two sections, cools insufficient, when pulling rate improves, easily occurs the defect such as crackle, crowning.
Casting process is very complicated, the various defects of strand are caused to associate with contradiction often, the misoperation of a certain step may will affect the effect of next step or previous step, need to monitor whole casting process and regulate, reasonably send the cooperation between each equipment, and present control system is not comprehensively with rationally.
Utility model content
Goal of the invention of the present utility model is: for above-mentioned Problems existing, a kind of novel conticaster is provided, tundish, secondary cooling system are optimized, can monitor each details of whole casting process, can pinpoint the problems timely, and carry out the regulation and control of each side, make continuous casting scheme reach optimum, saving resource, makes the Quality advance of the steel billet of production.
The technical solution adopted in the utility model is as follows:
Novel connection casting machine of the present utility model, comprises the ladle, tundish, crystallizer, secondary cooling system, withdrawal straightening machine, bending roll, smoothing roll, the flame cutting machine that connect successively; The bottom of described ladle is provided with slide gate nozzle; Be provided with stopper in described tundish, stopper be connected with stopper bar, below stopper, be provided with slide gate nozzle; It is characterized in that: described ladle connects N number of tundish, N>3; The volume of described tundish is 36t; Described secondary cooling water is divided into four sections, has 8 groups of backing rolls.
Due to said structure, ladle connects multiple tundish, can not need first to stop ladle changing again, for whole flow process is saved time, if connected together, then increasing the volume of tundish when changing tundish; Increase the volume of tundish, can lengthened molten steel buffer time, field trash has the sufficient time to be separated to float, keep liquid level stabilizing simultaneously; The increase of secondary cooling water hop count and backing roll, can strengthen intensity of cooling, obtains cooling more fully, thus improves pulling rate, avoiding cracking because rising again, occurring bulge phenomenon.
In force, the operating fluid level height of described tundish is 749mm, and outlet diameter is 21mm, and mouth of a river depth of invasion is 210mm, adopts magnesia coating; Described stopper adopts the phenolic resins of Al_2O_3-C based additional about 7% to make.
Due to said structure, the magnesia coating fire resistance that tundish adopts is relatively good, can increase the life-span of tundish; The heat resistanceheat resistant of the stopper that the phenolic resins of Al_2O_3-C based additional about 7% is made, anti-steel ability are very good, can extend the service life of stopper.
In force, described crystallizer adopts tube type mold, and the length of crystallizer is 1000mm, and the thickness of wall is 6-11mm, and the diameter of cooling water pipe is 5-7mm, and hydraulic pressure is 3-10kg/cm3, and taper value is 0.7%-0.9%.
Due to said structure, adopt length to be the tube type mold of 1000mm, add the length of crystallizer, increase the time of staying of molten steel, reduce the possibility of bleed-out, the taper value chosen is conducive to the raising of pulling rate.
In force, described a kind of Novel connection casting machine comprises control system, and described control system comprises detection module, PLC, Executive Module, and described detection module comprises:
Ladle detection module: comprise the level detection sensors device, the thermocouple that are arranged in ladle, is separately converted to data signal 101 and 102 by the liquid level of the molten steel in ladle and the temperature of molten steel, is sent to PLC; Be arranged at the electromagnetic flowmeter of slide gate nozzle end, flow signal be converted into data signal 103, be sent to PLC;
Tundish detection module: comprise and be arranged at around stopper, apart from the thermocouple of bag wall 350-450mm, opens ladle respectively and waters 5min, 25min, to terminate the temperature inversion that front 5min records be data signal 201,202,203 in cast, is sent to PLC; Be arranged at the electromagnetic flowmeter of slide gate nozzle end, flow signal be converted into data signal 204, be sent to PLC; Be arranged at the level detection sensors device in tundish, be data signal 205 by the liquid steel level high-degree of conversion in tundish, be sent to PLC;
Crystallizer detection module: comprise the laser liquid level meter be arranged in crystallizer, is data signal 301 by the liquid steel level high-degree of conversion in tundish, is sent to PLC; Be arranged at the probe of the thickness gauge on crystallizer inwall, the thickness of the covering slag recorded is delivered to thickness gauge, be converted into data signal 302, be sent to PLC;
Secondary cooling system detection module: comprise the flowmeter being arranged at cooling device import and export, is separately converted to data signal 401,402 by the turnover flow of cooling water, is sent to PLC; Be arranged at the temperature sensor in cooling tube, be data signal 403 by the temperature inversion of cooling water, be sent to PLC; Be arranged at the infrared ray sensor above strand, the radiation temperature of strand be converted into data signal 404, be sent to PLC;
PLC: receive the signal 101 that detection module sends, when | liquid level h1-work liquid level | >50mm, to Executive Module transmission executive signal 011; Receive data signal 102, if measured temperature is greater than preset temperature value, send executive signal 012 to Executive Module; Receive data signal 103, if the flow surveyed is greater than preset flow value, send executive signal 013 to Executive Module; Receive data signal 201,202,203, when the temperature that surveyed temperature (t1+t2+t3)/3< presets, send executive signal 021 to Executive Module; Receive data signal 204, if the flow surveyed is greater than preset flow value, send executive signal 022 to Executive Module; Receive data signal 205, when liquid level h2> preset height value, send executive signal 023 to Executive Module; Receive data signal 301, when liquid level h3> preset height value, send executive signal 031 to Executive Module; Receive data signal 302, if the thickness surveyed is greater than preset thickness 15mm, send executive signal 032 to Executive Module; If the thickness surveyed is less than 10mm, send executive signal 033 to Executive Module; Receive data signal 401,402, if the flow surveyed is less than preset value, send executive signal 041 to Executive Module; Receive data signal 403, if measured temperature is greater than preset value, send executive signal 042 to Executive Module; Receive data signal 404, computing is carried out to data signal 404, if gained temperature t4>1100 degree Celsius or t4<900 degree Celsius, send executive signal 043 to Executive Module;
Executive Module: receive the executive signal 011 that PLC sends, opens ladle steel import greatly or steel ladle sliding water gap is opened greatly; Receive the executive signal 012 that PLC sends, carry out Argon adjustment; Receive the executive signal 013 that PLC sends, the slide gate nozzle of ladle is turned down; Receive the executive signal 021 that PLC sends, water inlet is heated; Receive the executive signal 022 that PLC sends, tundish slide gate nozzle is turned down; Receive the executive signal 023 that PLC sends, heighten tundish slide gate nozzle or turn steel ladle sliding water gap down; Receive the executive signal 031 that PLC sends, tundish slide gate nozzle is turned down; Receive the executive signal 032 that PLC sends, accelerate casting speed, receive the executive signal 033 that PLC sends, tune up tundish slide gate nozzle or the casting speed that slows down; Receive the executive signal 041 that PLC sends, the electronic valve of cooling water intake-outlet is opened greatly; Receive the executive signal 042 that PLC sends, the electronic valve of cooling water intake-outlet is opened greatly; Receive the executive signal 043 that PLC sends, the electronic valve of cooling water intake-outlet is tuned up.
In sum, owing to have employed technique scheme, the beneficial effects of the utility model are:
1 molten steel buffer time, field trash has the sufficient time to be separated floating, keeps liquid level stabilizing simultaneously.
Ladle connects multiple tundish, can not need first to stop ladle changing again, for whole flow process is saved time, if connected together, then increasing the volume of tundish when changing tundish; Increase the volume of tundish, can lengthened molten steel buffer time, field trash has the sufficient time to be separated to float, keep liquid level stabilizing simultaneously.
2 strengthen intensity of cooling
The increase of secondary cooling water hop count and backing roll, can strengthen intensity of cooling, obtains cooling more fully, thus improves pulling rate, avoiding cracking because rising again, occurring bulge phenomenon.
The service life of 3 prolongation tundish and stopper.
The magnesia coating fire resistance that tundish adopts is relatively good, can increase the life-span of tundish; The heat resistanceheat resistant of the stopper that the phenolic resins of Al_2O_3-C based additional about 7% is made, corrosion resistance are very good, can extend the service life of stopper.
The time of staying of 4 increase molten steel
Adopt length to be the tube type mold of 1000mm, add the length of crystallizer, increase the time of staying of molten steel, reduce the possibility of bleed-out.
The whole casting process of 5 monitoring, Timeliness coverage problem, and regulate.
Parameter for each flow process in casting process is measured, and is processed by PLC, controls according to measured value, thus long-rangely monitors whole process.
6 saving resources, increase operation rate.
In casting process, by measuring the liquid level in each equipment and controlling, reduce and avoid bleed-out, something lost steel.
The productivity ratio of 7 raising strands and quality.
When each factor affecting Casting speed is stable and reach optimum efficiency, the pulling rate of strand can improve, thus improve the productivity ratio of strand, simultaneously by factor that the quality of control effect strand goes wrong, reduce the generation of the problems such as shape defect, blemish, internal flaw, improve the quality of strand.
Accompanying drawing explanation
Fig. 1 is the structural representation of Novel connection casting machine.
Mark in figure: 1 is ladle, and 2 is tundish, and 3 is stopper, and 4 is stopper bar, and 5 is slide gate nozzle, and 6 is crystallizer, and 7 is secondary cooling system, and 8 is withdrawal straightening machine, and 9 is bending roll, and 10 is smoothing roll, and 11 is flame cutting machine.
Fig. 2 is the autocontrol system block diagram of Novel connection casting machine.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in detail.
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 1, Novel connection casting machine of the present utility model, comprises the ladle, tundish, crystallizer, secondary cooling system, withdrawal straightening machine, bending roll, smoothing roll, the flame cutting machine that connect successively; The bottom of described ladle is provided with slide gate nozzle; Be provided with stopper in described tundish, stopper be connected with stopper bar, below stopper, be provided with slide gate nozzle; It is characterized in that: described ladle connects N number of tundish, N>3; The volume of described tundish is 36t; Described secondary cooling water is divided into four sections, has 8 groups of backing rolls.
In force, the operating fluid level height of described tundish is 749mm, and outlet diameter is 21mm, and mouth of a river depth of invasion is 210mm, adopts magnesia coating; Described stopper adopts the phenolic resins of Al_2O_3-C based additional about 7% to make.
In force, described crystallizer adopts tube type mold, and the length of crystallizer is 1000mm, and the thickness of wall is 6-11mm, and the diameter of cooling water pipe is 5-7mm, and hydraulic pressure is 3-10kg/cm3, and taper value is 0.7%-0.9%.
As Fig. 2, in force, described a kind of Novel connection casting machine comprises control system, and described control system comprises detection module, PLC, Executive Module, and described detection module comprises:
Ladle detection module: comprise the level detection sensors device, the thermocouple that are arranged in ladle, is separately converted to data signal 101 and 102 by the liquid level of the molten steel in ladle and the temperature of molten steel, is sent to PLC; Be arranged at the electromagnetic flowmeter of slide gate nozzle end, flow signal be converted into data signal 103, be sent to PLC;
Tundish detection module: comprise and be arranged at around stopper, apart from the thermocouple of bag wall 350-450mm, opens ladle respectively and waters 5min, 25min, to terminate the temperature inversion that front 5min records be data signal 201,202,203 in cast, is sent to PLC; Be arranged at the electromagnetic flowmeter of slide gate nozzle end, flow signal be converted into data signal 204, be sent to PLC; Be arranged at the level detection sensors device in tundish, be data signal 205 by the liquid steel level high-degree of conversion in tundish, be sent to PLC;
Crystallizer detection module: comprise the laser liquid level meter be arranged in crystallizer, is data signal 301 by the liquid steel level high-degree of conversion in tundish, is sent to PLC; Be arranged at the probe of the thickness gauge on crystallizer inwall, the thickness of the covering slag recorded is delivered to thickness gauge, be converted into data signal 302, be sent to PLC;
Secondary cooling system detection module: comprise the flowmeter being arranged at cooling device import and export, is separately converted to data signal 401,402 by the turnover flow of cooling water, is sent to PLC; Be arranged at the temperature sensor in cooling tube, be data signal 403 by the temperature inversion of cooling water, be sent to PLC; Be arranged at the infrared ray sensor above strand, the radiation temperature of strand be converted into data signal 404, be sent to PLC;
PLC: receive the signal 101 that detection module sends, when | liquid level h1-work liquid level | >50mm, to Executive Module transmission executive signal 011; Receive data signal 102, if measured temperature is greater than preset temperature value, send executive signal 012 to Executive Module; Receive data signal 103, if the flow surveyed is greater than preset flow value, send executive signal 013 to Executive Module; Receive data signal 201,202,203, when the temperature that surveyed temperature (t1+t2+t3)/3< presets, send executive signal 021 to Executive Module; Receive data signal 204, if the flow surveyed is greater than preset flow value, send executive signal 022 to Executive Module; Receive data signal 205, when liquid level h2> preset height value, send executive signal 023 to Executive Module; Receive data signal 301, when liquid level h3> preset height value, send executive signal 031 to Executive Module; Receive data signal 302, if the thickness surveyed is greater than preset thickness 15mm, send executive signal 032 to Executive Module; If the thickness surveyed is less than 10mm, send executive signal 033 to Executive Module; Receive data signal 401,402, if the flow surveyed is less than preset value, send executive signal 041 to Executive Module; Receive data signal 403, if measured temperature is greater than preset value, send executive signal 042 to Executive Module; Receive data signal 404, computing is carried out to data signal 404, if gained temperature t4>1100 degree Celsius or t4<900 degree Celsius, send executive signal 043 to Executive Module;
Executive Module: receive the executive signal 011 that PLC sends, opens ladle steel import greatly or steel ladle sliding water gap is opened greatly; Receive the executive signal 012 that PLC sends, carry out Argon adjustment; Receive the executive signal 013 that PLC sends, the slide gate nozzle of ladle is turned down; Receive the executive signal 021 that PLC sends, water inlet is heated; Receive the executive signal 022 that PLC sends, tundish slide gate nozzle is turned down; Receive the executive signal 023 that PLC sends, heighten tundish slide gate nozzle or turn steel ladle sliding water gap down; Receive the executive signal 031 that PLC sends, tundish slide gate nozzle is turned down; Receive the executive signal 032 that PLC sends, accelerate casting speed, receive the executive signal 033 that PLC sends, tune up tundish slide gate nozzle or the casting speed that slows down; Receive the executive signal 041 that PLC sends, the electronic valve of cooling water intake-outlet is opened greatly; Receive the executive signal 042 that PLC sends, the electronic valve of cooling water intake-outlet is opened greatly; Receive the executive signal 043 that PLC sends, the electronic valve of cooling water intake-outlet is tuned up.
The utility model has a larger tundish volume can lengthened molten steel buffer time, and field trash has the sufficient time to be separated to float, keep liquid level stabilizing simultaneously; Intensity of cooling can also be strengthened, extend the service life of tundish and stopper; Monitor whole casting process, Timeliness coverage problem, and regulate; Saving resource, increases operation rate; Improve productivity ratio and the quality of strand.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (4)
1. a Novel connection casting machine, comprises the ladle, tundish, crystallizer, secondary cooling system, withdrawal straightening machine, bending roll, smoothing roll, the flame cutting machine that connect successively; The bottom of described ladle is provided with slide gate nozzle; Be provided with stopper in described tundish, stopper be connected with stopper bar, below stopper, be provided with slide gate nozzle; It is characterized in that: described ladle connects N number of tundish, N>3; The volume of described tundish is 36t; Described secondary cooling water is divided into four sections, has 8 groups of backing rolls.
2. a kind of Novel connection casting machine according to claim 1, is characterized in that: the operating fluid level height of described tundish is 749mm, and outlet diameter is 21mm, and mouth of a river depth of invasion is 210mm, adopts magnesia coating; Described stopper adopts the phenolic resins of Al_2O_3-C based additional about 7% to make.
3. a kind of Novel connection casting machine according to claim 2, is characterized in that: described crystallizer adopts tube type mold, and the length of crystallizer is 1000mm, and the thickness of wall is 6-11mm, and the diameter of cooling water pipe is 5-7mm, and hydraulic pressure is 3-10kg/cm
3, taper value is 0.7%-0.9%.
4. a kind of Novel connection casting machine according to claim 3, it is characterized in that: comprise control system, described control system comprises detection module, PLC, Executive Module, and described detection module comprises:
Ladle detection module: comprise the level detection sensors device, the thermocouple that are arranged in ladle, is separately converted to data signal 101 and 102 by the liquid level of the molten steel in ladle and the temperature of molten steel, is sent to PLC; Be arranged at the electromagnetic flowmeter of slide gate nozzle end, flow signal be converted into data signal 103, be sent to PLC;
Tundish detection module: comprise and be arranged at around stopper, apart from the thermocouple of bag wall 350-450mm, opens ladle respectively and waters 5min, 25min, to terminate the temperature inversion that front 5min records be data signal 201,202,203 in cast, is sent to PLC; Be arranged at the electromagnetic flowmeter of slide gate nozzle end, flow signal be converted into data signal 204, be sent to PLC; Be arranged at the level detection sensors device in tundish, be data signal 205 by the liquid steel level high-degree of conversion in tundish, be sent to PLC;
Crystallizer detection module: comprise the laser liquid level meter be arranged in crystallizer, is data signal 301 by the liquid steel level high-degree of conversion in tundish, is sent to PLC; Be arranged at the probe of the thickness gauge on crystallizer inwall, the thickness of the covering slag recorded is delivered to thickness gauge, be converted into data signal 302, be sent to PLC;
Secondary cooling system detection module: comprise the flowmeter being arranged at cooling device import and export, is separately converted to data signal 401,402 by the turnover flow of cooling water, is sent to PLC; Be arranged at the temperature sensor in cooling tube, be data signal 403 by the temperature inversion of cooling water, be sent to PLC; Be arranged at the infrared ray sensor above strand, the radiation temperature of strand be converted into data signal 404, be sent to PLC;
PLC: receive the signal 101 that detection module sends, when | liquid level h1-work liquid level | >50mm, to Executive Module transmission executive signal 011; Receive data signal 102, if measured temperature is greater than preset temperature value, send executive signal 012 to Executive Module; Receive data signal 103, if the flow surveyed is greater than preset flow value, send executive signal 013 to Executive Module; Receive data signal 201,202,203, when the temperature that surveyed temperature (t1+t2+t3)/3< presets, send executive signal 021 to Executive Module; Receive data signal 204, if the flow surveyed is greater than preset flow value, send executive signal 022 to Executive Module; Receive data signal 205, when liquid level h2> preset height value, send executive signal 023 to Executive Module; Receive data signal 301, when liquid level h3> preset height value, send executive signal 031 to Executive Module; Receive data signal 302, if the thickness surveyed is greater than preset thickness 15mm, send executive signal 032 to Executive Module; If the thickness surveyed is less than 10mm, send executive signal 033 to Executive Module; Receive data signal 401,402, if the flow surveyed is less than preset value, send executive signal 041 to Executive Module; Receive data signal 403, if measured temperature is greater than preset value, send executive signal 042 to Executive Module; Receive data signal 404, computing is carried out to data signal 404, if gained temperature t4>1100 degree Celsius or t4<900 degree Celsius, send executive signal 043 to Executive Module;
Executive Module: receive the executive signal 011 that PLC sends, opens ladle steel import greatly or steel ladle sliding water gap is opened greatly; Receive the executive signal 012 that PLC sends, carry out Argon adjustment; Receive the executive signal 013 that PLC sends, the slide gate nozzle of ladle is turned down; Receive the executive signal 021 that PLC sends, water inlet is heated; Receive the executive signal 022 that PLC sends, tundish slide gate nozzle is turned down; Receive the executive signal 023 that PLC sends, heighten tundish slide gate nozzle or turn steel ladle sliding water gap down; Receive the executive signal 031 that PLC sends, tundish slide gate nozzle is turned down; Receive the executive signal 032 that PLC sends, accelerate casting speed, receive the executive signal 033 that PLC sends, tune up tundish slide gate nozzle or the casting speed that slows down; Receive the executive signal 041 that PLC sends, the electronic valve of cooling water intake-outlet is opened greatly; Receive the executive signal 042 that PLC sends, the electronic valve of cooling water intake-outlet is opened greatly; Receive the executive signal 043 that PLC sends, the electronic valve of cooling water intake-outlet is tuned up.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520976093.1U CN205183722U (en) | 2015-12-01 | 2015-12-01 | Novel conticaster |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520976093.1U CN205183722U (en) | 2015-12-01 | 2015-12-01 | Novel conticaster |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105195699A (en) * | 2015-10-12 | 2015-12-30 | 无锡市惠山合力传热设备厂 | Temperature control continuous casting machine device |
| CN106979899A (en) * | 2017-03-20 | 2017-07-25 | 燕山大学 | Crystallizer coating high temperature friction and wear behavior evaluation experimental machine |
-
2015
- 2015-12-01 CN CN201520976093.1U patent/CN205183722U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105195699A (en) * | 2015-10-12 | 2015-12-30 | 无锡市惠山合力传热设备厂 | Temperature control continuous casting machine device |
| CN106979899A (en) * | 2017-03-20 | 2017-07-25 | 燕山大学 | Crystallizer coating high temperature friction and wear behavior evaluation experimental machine |
| CN106979899B (en) * | 2017-03-20 | 2022-06-24 | 燕山大学 | Crystallizer cladding high-temperature friction and wear performance evaluation experiment machine |
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Granted publication date: 20160427 Termination date: 20161201 |