CN104493114A - Method for measuring liquid cave morphology of aluminum alloy cast ingot by using tracing metal - Google Patents
Method for measuring liquid cave morphology of aluminum alloy cast ingot by using tracing metal Download PDFInfo
- Publication number
- CN104493114A CN104493114A CN201410708209.3A CN201410708209A CN104493114A CN 104493114 A CN104493114 A CN 104493114A CN 201410708209 A CN201410708209 A CN 201410708209A CN 104493114 A CN104493114 A CN 104493114A
- Authority
- CN
- China
- Prior art keywords
- metal
- casting
- cast ingot
- ingot
- spike metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Continuous Casting (AREA)
Abstract
The invention discloses a method for measuring liquid cave morphology of an aluminum alloy cast ingot by using a tracing metal. The method comprises the following steps: melting the tracing metal and preserving heat; continuously injecting the tracing metal into a molten metal to be measured at the tail end of a launder in a semicontinuous casting process; after injecting, solidifying the tracing metal and a cast ingot to be measured together in a crystallizer; after casting, taking a longitudinal section at the center of a position where the tracing metal is added into the cast ingot; after polishing, corroding the longitudinal section in an alkali or acid solution; displaying the liquid cave morphology of the cast ingot to be measured by virtue of the deposition of the tracing metal inside the cast ingot and the difference of corrosion resistances of the tracing metal and the cast ingot to be measured, and directly measuring liquid cave depth. By the method, the liquid cave morphology and the liquid cave depth of the aluminum alloy cast ingot can be clearly displayed and accurately measured, and the method is simple to operate and easy to implement.
Description
Technical field
The present invention relates to a kind of method adopting spike metal to measure aluminium alloy cast ingot liquid point depth, belong to aluminum alloy semi-continuous casting technical field.
Background technology
Current, cast aluminium alloy flat ingot for extruding and rolling deformation prepares production with the mode of circle ingot casting many employings direct water-cooling semi-continuous casting, the main feature of this technique be melted metal continually by crystallizer, rely on crystallizer to realize solidifying of metal and restriction molding.In this art production process, ingot casting top by crystallization front and the open liquid level of ingot casting the liquid metals region that surrounds be referred to as liquid cave.The shape in ingot casting liquid cave decides the change of ingot casting section metallic crystallization rate, the degree of depth in liquid cave then directly reflects setting time in ingot casting preparation process and setting rate, therefore, Measurement accuracy and adjustment liquid cave pattern and liquid point depth are reaction and important indicator and the means controlling ingot quality.
Conventional measurement liquid cave pattern and the method for the degree of depth are plugging wire method, or probe method, namely in casting process, adopt filament or probe vertically to insert melt inside from metal bath surface, until touching to ingot casting solid phase, then extract out, the length inserting silk or probe by measuring diverse location calculates ingot casting liquid cave.Though the method is simple and easy to do, measuring accuracy affects by operating personnel's experience and probe perpendicularity, and error is comparatively large, accurately can not reflect the pattern change of liquid cave.If casting condition or process reform, then error amount is larger.For making up the error that the measurement of plugging wire method brings, thermocouple method arises at the historic moment.The method is in casting process, and imbed metallic thermocouple online to inside ingot diverse location, thermocouple solidifies with ingot casting, relies on the variations in temperature of diverse location thermocouple to reflect the liquid cave pattern of ingot casting.It is accurate that the method measures liquid cave numerical value, can its pattern of quantitative response and change in depth, but adopt metallic thermocouple method complicated operation, and having measured rear ingot casting can only scrap process, and cost is higher.And, measure high strength 7 ××× and 2 ××× duralumin, hard alumin ium alloy ingot casting time, add inside ingot stress concentration point because of immersioning thermocouple, may cause ingot casting ftracture even split phenomenon generation, application is subject to certain restrictions.
Summary of the invention
The object of the invention is the deficiency existed to overcome prior art, providing a kind of method adopting spike metal to measure aluminium alloy cast ingot liquid cave pattern.
Object of the present invention is achieved through the following technical solutions:
A kind of method adopting spike metal to measure aluminium alloy cast ingot liquid cave pattern, it is characterized in that: be first incubated after spike metal molten, in the tested metal bath of chute end, spike metal is injected continuously in semi-continuous casting process, after injecting, spike metal and tested ingot casting solidify in the lump in crystallizer, after casting terminates, vertical section is got in the center adding the position of spike metal at ingot casting, can show liquid cave pattern, directly measure liquid point depth through polishing post-etching.
Further, described spike metal is contained aluminium-base intermediate alloy, and its density is greater than the density of tested cast metals.
Further, the holding temperature after described spike metal melt is higher than tested ingot casting casting temperature 20 DEG C ~ 100 DEG C.
Further, spike metal 0.2Kg ~ 10Kg is injected in described semi-continuous casting process.
Further, described in add the ingot casting after spike metal, after polishing, utilize alkali lye or acid liquid corrosion ingot casting surface.
The substantive distinguishing features that technical solution of the present invention is outstanding and significant progress are mainly reflected in:
(1) the present invention is compared with the measuring method of traditional liquid cave, and the present invention relies on the difference of spike metal and tested metal corrosion-resisting to realize the clear display of ingot casting liquid cave pattern, and directly can measure liquid point depth.After adopting measuring method of the present invention, the human error brought when traditional insertion can be avoided to measure liquid point depth, sump shape is able to display directly perceived, and the order of accuarcy of measurement result is improved;
(2) the present invention is compared with thermocouple method, in casting process, mainly pass through the mode of adding aluminium base spike metal, utilize spike metal and tested aluminium alloy density variation to make spike metal solid precipitation bottom ingot casting, saved cost significantly, and easy to operate, be easy to realize.
Accompanying drawing explanation
Fig. 1 is the operation chart of the inventive method;
Fig. 2 is the round ingot casting liquid cave pattern that the inventive method is measured.
The implication of each Reference numeral in figure:
1-aluminium alloy melt, 2-spike metal bath, 3-ingot casting, 4-ingot casting liquid cave, 5-chute.
Detailed description of the invention
As depicted in figs. 1 and 2, the invention provides a kind of method adopting spike metal to measure aluminium alloy cast ingot liquid cave pattern.First be incubated after spike metal molten, then in semi-continuous casting process, inject spike metal bath 2 continuously to the end of chute 5, make it to be mixed into tested metal bath 1 inner, then in crystallizer, be frozen into ingot casting 3 in the lump.After casting terminates, get vertical section in the center adding the position of spike metal of ingot casting 3, the pattern in liquid cave 4 can be shown through polishing post-etching, and directly can measure liquid point depth.
The present invention can clear display and Measurement accuracy aluminium alloy cast ingot liquid cave pattern and liquid cave pattern, and its key problem in technology is as follows:
(1) selection of spike metal: select density to be greater than the contained aluminium-base intermediate alloy of measured aluminium alloy cast ingot density as spike metal, the density of metal fine aluminium is 2380Kg/m3 when liquid state, and the density range of aluminium alloy melt is 2350 ~ 2490Kg/m3.When selecting aluminium base spike metal, more options aluminum bronze intermediate alloy, this alloy density scope is 3110 ~ 3680Kg/m3, is greater than aluminium alloy melt density, can show tested ingot casting liquid cave pattern by gravity sedimentation mode.
(2) fusing of spike metal: utilize intermediate frequency furnace or resistance furnace by spike metal molten, be incubated after arriving uniform temperature, holding temperature is generally higher than tested ingot casting casting temperature 20 DEG C ~ 100 DEG C.
(3) the adding of spike metal: after casting starts, inject 0.2Kg ~ 10Kg spike metal in the tested metal bath of chute end continuously, spike metal injection rate is relevant with tested aluminium alloy cast ingot specification, and ingot casting specification is larger, and spike metal injection rate is more.After injecting, spike metal and tested ingot casting solidify in the lump in crystallizer.Different according to measurement object, spike metal can inject continuously in casting different phase, can reflect the liquid cave pattern change of different phase ingot casting respectively;
(4) display of spike metal/liquid cave pattern: get vertical section in the center of ingot casting relevant position (position corresponding when adding spike metal) after casting terminates, can show through polishing post-etching.
Here is the instantiation of application technical solution of the present invention, and it only provides as an example, is not considered as limiting application of the present invention.The equivalent replacement of all operating conditions, all drops within protection scope of the present invention.
embodiment:
The mass percentage of Al-30%Cu(Cu is selected to be 30%) intermediate alloy is as spike metal.The present embodiment ingot casting to be measured is 7050 alloy circle ingot castings, this alloy density scope is 2410 ~ 2450Kg/m3, select Al-30%Cu intermediate alloy as spike metal, this alloy density is: 3410 ~ 3480Kg/m3, larger than tested alloy density value, ingot casting liquid cave can be shown by gravity sedimentation mode.
Before casting starts, utilize intermediate frequency furnace by spike metal molten, after arriving 750 DEG C, carry out degasification and isothermal holding.When reaching the stabilization sub stage, get the Al-30%Cu alloy melt 5Kg at stove inside holding after fusing, slowly inject chute end and crystallizer advanced position after semi-continuous casting starts.Spike metal bath imports 7050 aluminium alloy cast ingot melts and enters crystallizer in the lump, under the effect of cooling water together with ingot casting coagulation forming.
After casting terminates, in the relevant position adding spike metal, 7050 aluminium alloy cast ingots are longitudinally cut open, after polishing etch, be deposited on bottom solid phase due to spike metal and present different corrosion resistances from tested 7050 aluminium alloys, and then demonstrate the liquid cave pattern of inside ingot in casting process, as shown in Figure 2.Through quantitative measurment, under these process conditions, 7050 ingot casting liquid point depths are 78mm.
For Φ 154mm7050 aluminum alloy round ingot casting example, its detailed process is as follows:
(1) melting and melt treatment:
Spike metal is put into intermediate frequency furnace melting, arrives uniform temperature (a little more than cast temperature) and be incubated afterwards; Technical pure aluminium ingot and alloy cast ingot thereof are put into induction furnace melting, proceed in insulation standing furnace after alloy melting, and furnace refining, degasification and other process are carried out to melt, leave standstill 10 ~ 20 minutes, when melt temperature is down to 720 ~ 740 DEG C, carry out semi-continuous casting.
(2) semi-continuous casting:
In the present embodiment, liquid cave to be detected ingot casting is Φ 154mm7050 circle ingot casting, and this ingot casting semicontinuous casting technique is: casting temperature 700 DEG C, and casting speed is 100mm/min.Before semi-continuous casting starts, setting cooling water flow excursion is 4 ~ 6m3/h, and the initial casting speed of casting machine is 60mm/min, and casting process starts rear speed linearity and is increased to 100mm/min, when extrusion ingot length is 1000mm, the spike metal melted in advance is added in crystallizer.After casting terminates, to get after ingot casting 900-1100mm section centrally line vertical profile, after polishing etch, liquid cave pattern as shown in Figure 2, is about 78mm through measuring liquid point depth.
Claims (5)
1. the method adopting spike metal to measure aluminium alloy cast ingot liquid cave pattern, it is characterized in that: be first incubated after spike metal molten, in the tested metal bath of chute end, spike metal is injected continuously in semi-continuous casting process, after injecting, spike metal and tested ingot casting solidify in the lump in crystallizer, after casting terminates, vertical section is got in the center adding the position of spike metal at ingot casting, can show liquid cave pattern, directly measure liquid point depth through polishing post-etching.
2. a kind of method adopting spike metal to measure aluminium alloy cast ingot liquid cave pattern according to claim 1, is characterized in that: described spike metal is contained aluminium-base intermediate alloy, and its density is greater than the density of tested cast metals.
3. a kind of method adopting spike metal to measure aluminium alloy cast ingot liquid cave pattern according to claim 1 and 2, is characterized in that: the holding temperature after described spike metal melt is higher than tested ingot casting casting temperature 20 DEG C ~ 100 DEG C.
4. a kind of method adopting spike metal to measure aluminium alloy cast ingot liquid cave pattern according to claim 1 and 2, is characterized in that: injecting spike amount of metal in described semi-continuous casting process is 0.2Kg ~ 10Kg.
5. a kind of method adopting spike metal to measure aluminium alloy cast ingot liquid cave pattern according to claim 1 and 2, is characterized in that: described in add the ingot casting after spike metal after polishing, utilize alkali lye or acid liquid corrosion ingot casting surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410708209.3A CN104493114A (en) | 2014-11-28 | 2014-11-28 | Method for measuring liquid cave morphology of aluminum alloy cast ingot by using tracing metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410708209.3A CN104493114A (en) | 2014-11-28 | 2014-11-28 | Method for measuring liquid cave morphology of aluminum alloy cast ingot by using tracing metal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104493114A true CN104493114A (en) | 2015-04-08 |
Family
ID=52934614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410708209.3A Pending CN104493114A (en) | 2014-11-28 | 2014-11-28 | Method for measuring liquid cave morphology of aluminum alloy cast ingot by using tracing metal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104493114A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105675513A (en) * | 2016-01-18 | 2016-06-15 | 西宁特殊钢股份有限公司 | Method for determining morphology of metal molten pool for electroslag remelting |
| CN112986527A (en) * | 2021-01-29 | 2021-06-18 | 山东理工大学 | Method for representing transmission behavior in molten pool in double-roller casting process |
| CN114472820A (en) * | 2021-12-09 | 2022-05-13 | 广西南南铝加工有限公司 | Preparation method and device of cast ingot for high-toughness high-corrosion-resistance aluminum alloy thick plate |
| CN117470617A (en) * | 2023-12-28 | 2024-01-30 | 中铝材料应用研究院有限公司 | Method for determining shape and position of solidification front in casting process of aluminum alloy |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101367115A (en) * | 2008-08-22 | 2009-02-18 | 武汉钢铁(集团)公司 | Casting blank liquid core length measuring method |
| CN201261064Y (en) * | 2008-07-31 | 2009-06-24 | 首钢总公司 | Tracing ring for continuous casting billet pin penetration test |
-
2014
- 2014-11-28 CN CN201410708209.3A patent/CN104493114A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201261064Y (en) * | 2008-07-31 | 2009-06-24 | 首钢总公司 | Tracing ring for continuous casting billet pin penetration test |
| CN101367115A (en) * | 2008-08-22 | 2009-02-18 | 武汉钢铁(集团)公司 | Casting blank liquid core length measuring method |
Non-Patent Citations (3)
| Title |
|---|
| 林建农等: "舞钢连铸板坯液芯长度测定", 《宽厚板》, vol. 11, no. 05, 31 October 2005 (2005-10-31) * |
| 栗伟等: "连铸坯液相穴长度的测定研究", 《北京科技大学学报》, vol. 25, no. 04, 31 August 2003 (2003-08-31) * |
| 高文芳等: "沉铅法测定连铸方坯液相穴长度的研究", 《炼钢》, vol. 26, no. 04, 31 August 2010 (2010-08-31) * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105675513A (en) * | 2016-01-18 | 2016-06-15 | 西宁特殊钢股份有限公司 | Method for determining morphology of metal molten pool for electroslag remelting |
| CN112986527A (en) * | 2021-01-29 | 2021-06-18 | 山东理工大学 | Method for representing transmission behavior in molten pool in double-roller casting process |
| CN112986527B (en) * | 2021-01-29 | 2023-10-10 | 山东理工大学 | Method for representing transmission behavior in molten pool in double-roller casting and rolling process |
| CN114472820A (en) * | 2021-12-09 | 2022-05-13 | 广西南南铝加工有限公司 | Preparation method and device of cast ingot for high-toughness high-corrosion-resistance aluminum alloy thick plate |
| CN117470617A (en) * | 2023-12-28 | 2024-01-30 | 中铝材料应用研究院有限公司 | Method for determining shape and position of solidification front in casting process of aluminum alloy |
| CN117470617B (en) * | 2023-12-28 | 2024-03-12 | 中铝材料应用研究院有限公司 | Method for determining shape and position of solidification front in casting process of aluminum alloy |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104493114A (en) | Method for measuring liquid cave morphology of aluminum alloy cast ingot by using tracing metal | |
| CN103820686B (en) | Electric conductivity is aldural line of 55%IACS and preparation method thereof | |
| CN108624959A (en) | The method for preparing single crystal super alloy using the seed crystal through solution treatment | |
| CN105463272A (en) | Production method for 5005 aluminum alloy circular ingots | |
| CN103424338B (en) | A kind of nonferrous alloy casting fluidity testing metal type dies | |
| CN104878443A (en) | Fusing and pouring method for pouring monocrystal casting | |
| CN103231029B (en) | Pouring method for large-section consumable electrode | |
| CN104458497A (en) | Method for judging high-temperature flow property of casting powder of crystallizer | |
| CN107574341A (en) | A kind of aluminium-silicon ingots and preparation method containing cerium | |
| Gueijman et al. | Vertical and horizontal directional solidification of Zn-Al and Zn-Ag diluted alloys | |
| CN102909332A (en) | Device and method for controlling superheat degree of molten steel in continuous casting ladle or tundish | |
| CN108642324A (en) | A kind of zinc-aluminum-magnesium strontium alloy ingot and preparation method thereof | |
| CN102719688B (en) | Process method capable of improving thermal fatigue property of polynary zinc-aluminum alloy | |
| TWI762264B (en) | Method for predicting temperature of molten steel | |
| CN103602853B (en) | A kind of low lead extrudes round brass rod and production method thereof | |
| CN104646641A (en) | Pulling rate reduction control method and tundish changing control method in continuous casting system | |
| CN109112418A (en) | Continuous casting method of high manganese steel | |
| CN104936724A (en) | Method for continuously casting ingot made of titanium or titanium alloy | |
| JP2013111603A (en) | Method of evaluating mold powder in continuous casting and continuous casting method using the same | |
| CN104451212A (en) | Silicon additive for melting and casting aluminum alloy and preparation method of silicon additive | |
| JP6070080B2 (en) | Continuous casting method of Cu-Zn-Si alloy | |
| JP6428260B2 (en) | How to measure the amount of tapping water | |
| JP3927957B2 (en) | Low melting point metal alloy forming method | |
| CN203451592U (en) | Cooling water device for improving quality of electro slag remelting steel ingots | |
| CN117470617B (en) | Method for determining shape and position of solidification front in casting process of aluminum alloy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150408 |