CN205324670U - Magnesium alloy rod power supersound semi -continuous casting and device of detecting a flaw - Google Patents
Magnesium alloy rod power supersound semi -continuous casting and device of detecting a flaw Download PDFInfo
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- CN205324670U CN205324670U CN201620102067.0U CN201620102067U CN205324670U CN 205324670 U CN205324670 U CN 205324670U CN 201620102067 U CN201620102067 U CN 201620102067U CN 205324670 U CN205324670 U CN 205324670U
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Abstract
The utility model discloses a magnesium alloy rod power supersound semi -continuous casting and device of detecting a flaw, including power ultrasonic generating device, ultrasonic inspection processing system and vertical direct water -cooling semi -continuous casting machine, power ultrasonic generating device includes supersonic generator, supersound timesharing vibration control system and three with specification supersound transmit section spare, and supersound transmit section spare includes that ultrasonic transducer, ultrasonic wave become width of cloth pole and instrument head, and ultrasonic inspection processing system includes ultrasonic wave receiving sensor, signal processing and supersonic generator 0, supersonic generator 1 display screen. During supersound transmit section spare inserted the magnesium alloy fuse -element simultaneously, interval transmit power supersound under the control of supersound timesharing vibration system, fuse -element solidified under the ultrasonic field effect and obtain thin crystalline substance and cast the stick. Use ultrasonic wave that supersound transmit section spare sent as the signal source, through ultrasonic wave receiving sensor, signal processing and determination module handle the ultrasonic wave wave form, and excellent internal defect situation is cast to the suggestion sureness on the ultrasonic flaw detection display screen.
Description
Technical field
This utility model belongs to metallurgical and field of metal preparation, particularly relates to a kind of magnesium alloy rod power ultrasonic semi-continuous casting and failure detector。
Background technology
Magnesium alloy is referred to as " green engineering material of 21 century ", has density little, and specific strength, specific stiffness are high, electromagnetic shielding capability is strong, machinability is good, and casting character is excellent and the advantage such as easy recovery, is widely used in Aero-Space, automobile and electronic applications。
The ultimate principle of semi-continuous casting is to be poured into by metal bath by the crystallizer of circulating water, after melt begins to solidify as green shell, by traction apparatus, it is pulled out crystallizer, and continues water-spraying control, thus obtaining ingot casting。Semi-continuous casting method has productivity ratio height, and casting cost is low, and simple operation and other advantages, through development for many years and improvement, it has also become industrial widely used non-ferrous metal casting rod production method。
The microscopic structure of semicontinuous casting rod has the disadvantages that, such as coarse grains, uneven microstructure, there is Segregation of Chemical Composition etc., has a strong impact on semicontinuous casting rod mechanical property and deformation performance。Further, since it is too fast to produce rate of cooling during casting rod, in casting rod, produces bigger internal stress, be easily generated the defects such as fire check。If defect is extended in deformation after unloading is processed, equipment safety operation is constituted bigger hidden danger, therefore should find defect as far as possible before deformation processing, and be undertaken scrapping process by defective casting rod。
Owing to crystal grain thinning can be effectively improved mechanical property and the deformation performance of casting rod, therefore to the tissue how refining semicontinuous casting rod, carry out many research, but only by the pouring temperature in improvement semi-continuous casting process, casting speed and cooling condition etc., limited efficiency, can not significantly refine casting rod crystal grain。
Ultrasound examination, as a kind of lossless detection method, has that penetration capacity is strong, highly sensitive, defect location is accurate, testing cost is low, speed is fast, to human body and the advantage such as environmentally friendly, is widely used in the defects detection of the materials such as metal。
In recent years, in semi-continuous casting process, using ultrasound field carries out the technology of crystal grain thinning and is rapidly developed, it has also become a kind of important method being effectively improved ingot solidification microstructure and mechanical property。VladimirIvanovich of the U.S. et al. has invented the ultrasound wave continuous Casting method of light-alloy, and verifies the effect of its crystal grain thinning by experiment；The impact of magnesium alloy cast tissue has been studied by Zhang Kang of Beijing Non-Ferrous Metal Research General Academy et al. by ultrasonic Treatment, and checking supersound process can play the effect reducing crystallite dimension, homogenization tissue by experiment；The cavitation effect of magnesium alloy fused mass supersound process has been studied by the Shao Zhiwen of Northeastern University, show that effective cavitation zone is a rotational ellipsoid in face of ultrasound emission, and its degree of depth maximum increases along with the increase of ultrasonic power。
Meanwhile, utilize ultrasound wave that continuously cast is carried out online ultrasonic flaw detection also to make some progress。The little Tian island health healthy hair of Showa Denko K. K of Japan understands the compressional wave oblique angle ripple ripple vertical with compressional wave utilizing phase array probe ultrasound probe to send, in the method that casting rod is carried out ultrasonic examination inspection by the mold near exit of horizontal casting, use two probes can realize the full detection of circumference of casting rod；Non-destructive detection device and the method for detection thereof of a kind of continuous casting and rolling production line have been invented in sea et al. of magnifying of De Dong technical machinery Manufacturing Co., Ltd, eddy current flaw detec and ultrasonic reflectoscope are placed on and run and in the coaster on track, utilize ultrasound wave and eddy current to carry out the flaw detection of casting part。
Although Fine by Ultrasonic crystal grain or ultrasonic nondestructive test have been carried out careful research work by above-mentioned unit or individual, but combine all without by the two, often only focus on one aspect。This utility model will overcome this barrier, Fine by Ultrasonic crystal grain and ultrasonic nondestructive test be combined, economize on resources, be greatly improved production efficiency。
Summary of the invention
The purpose of this utility model is to provide a kind of magnesium alloy rod power ultrasonic semi-continuous casting and failure detector, it is ultrasonic semi-continuous casting and the ultrasonic nondestructive test device of continuous casting line, crystal grain thinning can be reached, early find early to process the purpose of internal defective casting, thus improving qualification rate and the productivity ratio of the continuously cast such as magnesium, aluminum, it is to avoid the waste of man power and material。
The purpose of this utility model is achieved through the following technical solutions:
A kind of magnesium alloy rod power ultrasonic semi-continuous casting and failure detector, for to magnesium, the alloy melt of the continuous casting lines such as aluminum carries out Fine by Ultrasonic crystal grain effect and the foundry goods produced is carried out nondestructive inspection detection, it includes power ultrasonic generating means, ultrasonic examination processes system and vertical direct water-cooling semicontinuous casting machine, described power ultrasonic generating means includes supersonic generator, the ultrasound emission parts of ultrasonic timesharing vibration control system and three same specifications are constituted, and supersonic generator and ultrasonic timesharing vibration control system are connected by cable, ultrasonic timesharing vibration control system is connected by cable with the ultrasound emission parts of three same specifications respectively；Described ultrasound emission parts include threaded successively ultrasonic transducer, ultrasonic variable amplitude bar and tool heads, and ultrasonic transducer is connected with ultrasonic timesharing vibration control system by cable, in tool heads insertion alloy melt；Described ultrasonic examination processes system and includes passing sequentially through ultrasound wave reception sensor, signal processing and determination module and the ultrasonic inspection display screen that cable connects, and ultrasound wave receives sensor and is distributed in the outer peripheral side of casting rod by circular orientation device；Described vertical direct water-cooling semicontinuous casting machine includes alloy melt, casting rod, crystallizer and dummy device, and crystallizer is positioned on slide rail, can move left and right, and is goed deep into inside crystallizer by dummy device before cast。
Described a kind of magnesium alloy rod power ultrasonic semi-continuous casting and failure detector, wherein, the ultrasound emission parts of three same specifications diametrically arrange, and middle ultrasound emission parts are positioned at the circle centre position in casting rod cross section, and another two is positioned at 1/2 radius place around。
This utility model provides a kind of magnesium alloy rod power ultrasonic semi-continuous casting and method of detection simultaneously, and the alloy melt of the continuous casting line such as magnesium, aluminum can be carried out Fine by Ultrasonic crystal grain effect and the foundry goods produced carries out quickly comprehensively nondestructive inspection detection by it。
Object above is achieved through the following technical solutions:
A kind of magnesium alloy rod power ultrasonic semi-continuous casting and method of detection, it comprises the steps:
Step one, alloy, after dispensing, carry out fusing and the refine of alloy in fusing stove, then transfer in holding furnace by magnesium alloy fused mass, adjust pouring temperature, to be cast；
Step 2, chute and crystallizer to semicontinuous casting machine preheat；
Step 3, before cast, dummy device is goed deep in crystallizer, it is then injected into magnesium alloy fused mass, open power ultrasonic generating means, the high-frequency ac signal of telecommunication is produced by supersonic generator, timesharing drives ultrasonic transducer work, ultrasonic amplitude transformer is utilized to make the Amplitude amplification of mechanical vibration, insert in crystallizer in magnesium alloy fused mass by the tool heads that is connected with ultrasonic amplitude transformer, ultrasonic field is made to act in magnesium alloy fused mass, treat that magnesium alloy fused mass is formed about solidified shell at crystallizer wall, and then continue to be frozen into strand in the process that dummy device draws downwards, realize the semi-continuous casting of magnesium alloy fused mass under ultrasonic field effect；
While step 4, dummy device are opened, open ultrasonic examination and process system, the ultrasound wave sent with ultrasound emission parts is for signal source, receive sensor by ultrasound wave to send the ultrasonic signal received to signal processing and determination module, by signal processing and determination module, the ultrasound wave waveform received is processed, determine casting rod internal flaw situation finally according to the prompting on ultrasonic inspection display screen。Ultrasonic examination processes the working method of system and could be arranged to stop casting process two ways when only recording defective locations or there is bigger defect。
Described a kind of magnesium alloy rod power ultrasonic semi-continuous casting and method of detection, in step 3, diametrically being arranged by three the same specification ultrasound emission parts inserted in magnesium alloy fused mass, middle ultrasound emission parts are positioned at the circle centre position in casting rod cross section, and another two is positioned at 1/2 radius place around。
Compared with prior art, the beneficial effects of the utility model are:
1. Ultrasonic NDT and power ultrasonic are carefully brilliant uses same signal source, carries out simultaneously, saves cost, improves efficiency；
2. the voltage of power ultrasonic generating means is low, and electric current is little, and energy resource consumption is little, and technique is simple, easy and simple to handle；
3. under ultrasonication, bath movement is steady, and bath surface is not destroyed, and is prevented effectively from air-breathing slag inclusion, improves product quality；
4. ultrasonic field frequency, power are freely adjustable, and match with casting speed, it is determined that best casting parameter；
5. pollution-free, grain refining effect is notable, is suitable for alloys range wide, it is also possible in aluminium alloy and other alloys；
6. cost is low, and technological process is short, it is easier in realizing industrialized production。
Accompanying drawing explanation
Fig. 1 is this utility model one magnesium alloy rod power ultrasonic semi-continuous casting and failure detector that power ultrasonic semi-continuous casting and ultrasonic nondestructive test are combined。
In figure: 1 supersonic generator, 2 ultrasonic timesharing vibration control systems, 3 ultrasonic transducers, 4 ultrasonic variable amplitude bars, 5 tool heads, 6 magnesium alloy fused mass, 7 crystallizers, 8 ultrasound wave receive sensor, 9 signal processing parts, 10 ultrasonic examination decision makers, 11 casting rods, 12 dummy devices。
Detailed description of the invention
Below in conjunction with specific embodiment, embodiment of the present utility model is further illustrated:
As shown in Figure 1, a kind of magnesium alloy rod power ultrasonic semi-continuous casting and failure detector, for the alloy melt of the continuous casting line such as magnesium, aluminum being carried out Fine by Ultrasonic crystal grain effect and the foundry goods produced being carried out nondestructive inspection detection, system and vertical direct water-cooling semicontinuous casting machine is processed including power ultrasonic generating means, ultrasonic examination, described power ultrasonic generating means is made up of the ultrasound emission parts of power supply, supersonic generator 1, ultrasonic timesharing vibration control system 2 and three same specifications, and is connected by cable；The location of described ultrasound emission parts is controlled by the workbench being positioned on crystallizer, including ultrasonic transducer 3, ultrasonic variable amplitude bar 4 and tool heads 5, ultrasonic transducer 3 and ultrasonic variable amplitude bar 4 are threaded connection, ultrasonic variable amplitude bar 4 and tool heads 5 pass through Stud connection, ultrasonic transducer 3 is connected with ultrasonic timesharing vibration control system by cable, and during operation, tool heads 5 is inserted in alloy melt；Described ultrasonic examination processes system and includes ultrasound wave reception sensor 8, signal processing and determination module 9, ultrasonic inspection display screen 10 and power supply, ultrasound wave receives sensor 8, signal processing and determination module 9, ultrasonic inspection display screen 10 and passes sequentially through cable connection, ultrasound wave receives sensor 8 and arranges for noncontact with casting rod 11, circular orientation device be evenly arranged in the outer circumference of casting rod 11；Described vertical direct water-cooling semicontinuous casting machine includes alloy melt, casting rod 11, crystallizer and dummy device 12, and crystallizer is positioned on slide rail, can move left and right, and is goed deep into inside crystallizer by dummy device 12 before cast simultaneously。
Wherein, three the same specification ultrasound emission parts inserted in magnesium alloy fused mass diametrically arrange, and middle ultrasound emission parts are positioned at the circle centre position in casting rod cross section, and another two is positioned at around, is located substantially at 1/2 radius place。Owing to single ultrasound emission parts sphere of action is limited, such arrangement can make ultrasonication scope cover whole casting rod cross section as far as possible, obtains the more uniform thin brilliant casting rod of tissue distribution。
The operation principle of this device is: ultrasonic field effect is introduced in semi-continuous casting process, makes the magnesium alloy fused mass in crystallizer solidify under ultrasonic field effect。Magnesium alloy fused mass 6 in alloy smelting furnace is transferred to insulation a period of time in holding furnace, then passes through chute and be flowed in crystallizer 7。The high-frequency ac signal of telecommunication is produced by supersonic generator 1, ultrasonic timesharing vibration control system 2 timesharing drives ultrasonic transducer 3 to work, ultrasonic amplitude transformer 4 is utilized to make the Amplitude amplification of mechanical vibration, the tool heads 5 being connected with ultrasonic amplitude transformer 4 is inserted in magnesium alloy fused mass 6, the cavitation and the acoustic streaming effect that make ultrasonic field act in magnesium alloy fused mass, it is formed about solidified shell at crystallizer wall 7, and then in the process that dummy device 12 draws downwards, continue to be frozen into the casting rod 11 of uniformly refinement, it is achieved power ultrasonic magnesium alloy fused mass semi-continuous casting after the match。The ultrasound wave sent with ultrasound emission parts is for signal source, mold exit (casting rod periphery) circumferentially ultrasound wave at conticaster receives sensor 8, receive sensor by ultrasound wave to send the ultrasonic signal received to signal processing and determination module, by signal processing and determination module 9, the ultrasound wave waveform received is processed, finally determined casting rod internal flaw situation by ultrasonic examination display screen 10。
A kind of method using this utility model magnesium alloy rod power ultrasonic semi-continuous casting and failure detector to carry out magnesium alloy rod power ultrasonic semi-continuous casting and flaw detection, it comprises the steps:
Step one, alloy, after dispensing, carry out fusing and the refine of alloy in fusing stove, then transfer in holding furnace by magnesium alloy fused mass, adjust suitable pouring temperature, to be cast。
Step 2, causing that for preventing heat loss pouring temperature is lower than preset temperature, is fully warmed-up the parts such as chute and crystallizer of semicontinuous casting machine, generally chute is preheated to about 600 DEG C, crystallizer is preheated to 400-600 DEG C。
Step 3, before cast, dummy device is goed deep in crystallizer, it is then injected into magnesium alloy fused mass, open power ultrasonic generating means, the high-frequency ac signal of telecommunication is produced by supersonic generator, timesharing drives ultrasonic transducer work, ultrasonic amplitude transformer is utilized to make the Amplitude amplification of mechanical vibration, insert in crystallizer in magnesium alloy fused mass by the tool heads that is connected with ultrasonic amplitude transformer, ultrasonic field is made to act in magnesium alloy fused mass, treat that magnesium alloy fused mass is formed about solidified shell at crystallizer wall, and then continue to be frozen into strand in the process that dummy device draws downwards, realize the semi-continuous casting of magnesium alloy fused mass under ultrasonic field effect。
Wherein, three the same specification ultrasound emission parts inserted in magnesium alloy fused mass diametrically arrange, and middle ultrasound emission parts are positioned at the circle centre position in casting rod cross section, and another two is positioned at around, is located substantially at 1/2 radius place。Owing to single ultrasound emission parts sphere of action is limited, such arrangement can make ultrasonication scope cover whole casting rod cross section as far as possible, obtains the more uniform thin brilliant casting rod of tissue distribution。
While step 4, dummy device are opened, open ultrasonic examination and process system。The ultrasound wave sent with ultrasound emission parts is for signal source, mold exit circumferentially ultrasound wave at conticaster receives sensor, receive sensor by ultrasound wave to send the ultrasonic signal received to signal processing and determination module, by signal processing and determination module, the ultrasound wave waveform received is processed, determine casting rod internal flaw situation finally according to the prompting on ultrasonic inspection display screen。The standard judging casting rod internal flaw is, the ultrasonic signal amplitude that each sensor being arranged symmetrically with when zero defect exists receives is definite value, the existence of defect can cause the ultrasonic signal amplitude that each sensor receives change occur, according to the change threshold set, it is determined that whether the part causing signal amplitude difference is defect。Ultrasonic examination processes the working method of system and could be arranged to stop casting process two ways when only recording defective locations and there is bigger defect。
Wherein, adopt single ultrasound emission parts as the signal source of detection defect, defect for non-central position has good recall rate, but the defect for centre, the defect in especially perpendicular or parallel throwing direction, it is equally spaced vertically owing to ultrasound wave receives sensor, causes the signal amplitude received equal, very easily cause missing inspection。And adopt the ultrasound emission parts timesharing of three same specifications to drive, when being positioned at the ultrasound emission parts at 1/2 radius place as signal source, the defect in centre be can effectively detect, the missing inspection situation of single sensed signal sources and then the full detection of circumference realizing casting rod defect made up。
The method relates to semicontinuous ultrasonic casting and ultrasonic nondestructive test, and relevant parameter need to be adjusted according to alloying component, pouring temperature, casting speed etc., to obtain the technological effect of the best。The selection of relevant parameter can follow following principle: the size of crystallizer is determined by factors such as casting rod diameter, pouring temperature and casting speeds, and diameter, generally slightly larger than casting rod diameter, generally adopts short crystallizer, and height is between 200-400mm；Dummy device is by lead screw transmission, and casting speed scope arbitrarily can regulate between 80-240mm/min；Adopting JTS-3000 type intelligent numerical control supersonic generator, the peak power output of power ultrasonic generating means is 3kW, and frequency is 20-100KHz, arbitrarily can regulate in following scope；It is identical with the driving frequency of power ultrasonic generating means that the ultrasound wave adopted receives sensor frequency, is equally spaced along casting rod circumference simultaneously, arranges that quantity is determined by factors such as casting rod diameter and flaw detection precision。
Embodiment
Successively pure Mg, pure Al and pure Zn etc. are melted in the alloy smelting furnace of 680-720 DEG C and refine according to the charge ratio of AZ31B magnesium alloy, be then transferred in holding furnace, be incubated at 720 DEG C, it is ensured that aluminium alloy homogeneous temperature, to be cast。Consider the contracting base phenomenon that there is 3-5mm and the defect layer removing casting rod exocuticle 8-10mm thickness, for producing 90mm magnesium alloy cast rod, selecting crystallizer diameter is 105mm, according to parameters such as alloy species, cast temperature and casting rod diameters, selecting ultrasonic field parameter is 100KHz impulse wave, power is 1KW, and matched casting speed is 100mm/min, sets parameter respectively on power ultrasonic generating means and semicontinuous casting machine。Consider to be about 100mm from the casting rod diameter of crystallizer pull-out, therefore circumference is evenly arranged 6 ultrasound wave and receives sensor, and sensor frequency is 100KHz。Before cast, the chute of alloy and crystallizer toast preheating fully, and make chute temperature reach 600 DEG C, and mould temperature reaches 500 DEG C。After chute and crystallizer are preheated, open cooling water recirculation system, open flow valve, start cast, and open power ultrasonic generating means。Along with alloy melt is frozen at crystallizer wall, there is certain thickness green shell, start dummy device and ultrasonic flaw detecting device。In casting process, take care of yourself stablizing of liquid level in chute。In the process that casting rod is constantly pulled out, ultrasound wave receives the ultrasonic signal that sensor real-time reception sends from ultrasound emission parts, after signal processing and determination module, is observed and recorded the distribution situation of casting rod internal flaw by ultrasonic examination display screen。If finding bigger defect, then sending alarm, stopping casting process。After melt cast completes in holding furnace, close flow valve。Until casting rod pulls out from crystallizer, close power ultrasonic generating means, ultrasonic flaw detecting device and semicontinuous casting machine。Thin brilliant uniform AZ31B magnesium alloy cast rod can be prepared by this technical process, and understand the distribution situation of internal flaw。
Claims (2)
1. a magnesium alloy rod power ultrasonic semi-continuous casting and failure detector, for to magnesium, the alloy melt of the continuous casting lines such as aluminum carries out Fine by Ultrasonic crystal grain effect and the foundry goods produced is carried out nondestructive inspection detection, including vertical direct water-cooling semicontinuous casting machine, it is characterized in that, also include power ultrasonic generating means and ultrasonic examination processes system, described power ultrasonic generating means includes supersonic generator, the ultrasound emission parts of ultrasonic timesharing vibration control system and three same specifications are constituted, and supersonic generator and ultrasonic timesharing vibration control system are connected by cable, ultrasonic timesharing vibration control system is connected by cable with the ultrasound emission parts of three same specifications respectively；Described ultrasound emission parts include threaded successively ultrasonic transducer, ultrasonic variable amplitude bar and tool heads, and ultrasonic transducer is connected with ultrasonic timesharing vibration control system by cable, in tool heads insertion alloy melt；Described ultrasonic examination processes system and includes passing sequentially through ultrasound wave reception sensor, signal processing and determination module and the ultrasonic inspection display screen that cable connects, and ultrasound wave receives sensor and is distributed in the outer peripheral side of casting rod by circular orientation device。
2. a kind of magnesium alloy rod power ultrasonic semi-continuous casting as claimed in claim 1 and failure detector, it is characterized in that, the ultrasound emission parts of described three same specifications diametrically arrange, middle ultrasound emission parts are positioned at the circle centre position in casting rod cross section, and another two is positioned at 1/2 radius place around。
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105522131A (en) * | 2016-02-02 | 2016-04-27 | 吉林大学 | Magnesium alloy bar power ultrasonic semi-continuous casting and flaw detection device and method |
| CN109434052A (en) * | 2018-11-28 | 2019-03-08 | 苏州创浩新材料科技有限公司 | A kind of minor diameter Kufil ultrasound continuous casting process |
| CN112703073A (en) * | 2018-07-25 | 2021-04-23 | 南线有限责任公司 | Ultrasonic enhancement of direct cooled cast materials |
-
2016
- 2016-02-02 CN CN201620102067.0U patent/CN205324670U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105522131A (en) * | 2016-02-02 | 2016-04-27 | 吉林大学 | Magnesium alloy bar power ultrasonic semi-continuous casting and flaw detection device and method |
| CN112703073A (en) * | 2018-07-25 | 2021-04-23 | 南线有限责任公司 | Ultrasonic enhancement of direct cooled cast materials |
| CN112703073B (en) * | 2018-07-25 | 2024-02-06 | 南线有限责任公司 | Ultrasonic reinforcement for direct cooling of cast materials |
| CN109434052A (en) * | 2018-11-28 | 2019-03-08 | 苏州创浩新材料科技有限公司 | A kind of minor diameter Kufil ultrasound continuous casting process |
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