CN114054703B - Rail flaw detection and flaw reporting position positioning method - Google Patents
Rail flaw detection and flaw reporting position positioning method Download PDFInfo
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- CN114054703B CN114054703B CN202111307246.XA CN202111307246A CN114054703B CN 114054703 B CN114054703 B CN 114054703B CN 202111307246 A CN202111307246 A CN 202111307246A CN 114054703 B CN114054703 B CN 114054703B
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/18—Controlling or regulating processes or operations for pouring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
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- C—CHEMISTRY; METALLURGY
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention relates to a method for positioning a flaw detection and flaw reporting position of a steel rail, and belongs to the technical field of steel rail flaw detection methods. The technical scheme of the invention is as follows: calculating the distance P between the flaw detection and flaw indication position of the steel rail and the end part of the casting blank, and then calculating the flaw detection and flaw indication position of the steel rail and the length L of the end part of the first casting blank actually cut by the corresponding furnace time of the casting blank Cutting and cutting Then calculating the length L of the end part of the casting blank cut by the flaw detection and flaw detection position of the steel rail and the actual casting position of the corresponding casting blank Real world . The beneficial effects of the invention are as follows: according to the position of the flaw detection defect on the steel rail, the accurate length of the corresponding casting blank position from the molten steel casting of the furnace is calculated, the influence rule of the steel rail casting condition on the flaw detection of the steel rail can be accurately reflected, and a data reference is provided for optimizing the steel rail smelting process, so that the flaw detection qualification rate is improved.
Description
Technical Field
The invention relates to a method for positioning a flaw detection and flaw reporting position of a steel rail, and belongs to the technical field of steel rail flaw detection methods.
Background
The quality of the steel rail is directly related to the safe operation of the railway, so that the quality of each steel rail in the operation of the railway meets the requirements of related standards. In order to ensure that the quality of each steel rail is qualified, the steel rail is required to be subjected to internal quality inspection and external quality inspection when leaving the factory, wherein the internal quality of the steel rail is mainly inspected through ultrasonic flaw detection, and the defect existing in the steel rail position can be accurately reflected through the ultrasonic flaw detection of the steel rail.
The defect of steel rail flaw detection mainly comprises quality defects of casting blanks of rolled steel rails, wherein the quality defects of the casting blanks of the steel rails are mainly related to technological fluctuation in steel rail smelting and casting processes, the casting start condition of molten steel of each furnace of the steel rails has important influence on the quality of the casting blanks, in order to study the corresponding relation between the defect positions of the steel rail flaw detection and the casting start condition of molten steel, the corresponding casting blank positions of the steel rail flaw detection are firstly required to be determined, and casting distance between the corresponding casting blank positions and the molten steel of the furnace is calculated, namely the casting blank length is already cast when the molten steel of the furnace starts to be cast to the casting blank positions corresponding to the defect positions of the steel rail flaw detection.
And (3) generally taking the head of a first casting blank cast by each furnace of molten steel as a starting point of casting blank opening, and calculating the flaw detection defect position of the steel rail and the casting blank casting opening distance. Because each furnace of molten steel has balance in the tundish during smelting, the first casting blank of each furnace of the steel rail is not cast by the molten steel of the furnace, and part of molten steel can come from the previous furnace, so that the casting position of the molten steel of the furnace is positioned in the middle of the first casting blank; the last casting blank of the casting heat is not the furnace molten steel, and part of the casting heat can come from the next furnace molten steel, so that the next furnace molten steel casting position is positioned before the first casting blank of the furnace. Therefore, the first casting blank of the furnace is taken as a casting start point of the furnace, and the flaw detection defect position of the steel rail and the distance between the casting blank opening are calculated inaccurately.
Disclosure of Invention
The invention aims to provide a method for positioning flaw detection and flaw indication positions of steel rails, which calculates the accurate casting length of a corresponding casting blank position from molten steel of a furnace according to the positions of flaw detection defects on the steel rails, can accurately reflect the rule of influence of the casting condition of the steel rails on the flaw detection of the steel rails, and provides data reference for optimizing the steel rail smelting process, thereby improving the flaw detection qualification rate and effectively solving the problems in the background art.
The technical scheme of the invention is as follows: a method for positioning flaw detection and flaw reporting positions of steel rails comprises the following steps:
(1) Firstly, calculating the distance P between the flaw detection and flaw detection position of the steel rail and the end part of the casting blank, wherein the distance P between the flaw detection and flaw detection position of the steel rail and the end part of the casting blank is represented by P, P= (C+E)/delta, wherein C represents the length of a crop in the rolling process of the steel rail, E represents the distance between the flaw detection and flaw detection position of the steel rail and the end part of the steel rail, and delta represents the compression ratio of the steel rail;
(2) Then calculating the flaw detection and flaw indication position of the steel rail and the length L of the end part of the first casting blank actually cut by the corresponding casting blank in the heat Cutting and cutting If the flaw detection and flaw indication steel rail casting blank is the nth steel rail cut in the furnace, L Cutting and cutting The length sum of the 1 st steel rail to the n-1 st steel rail is equal to the length sum of the furnace cutting, and P is added;
(3) Finally, calculating the length L of the end part of the casting blank cut by the flaw detection and flaw detection position of the steel rail and the actual casting position of the corresponding casting blank Real world ，L Real world = L Cutting and cutting ΔL, where ΔL represents the balance length per ladle of molten steel per ladle.
In the step (1), the steel rail compression ratio delta=a/B, wherein a represents the casting blank cross-sectional area, and B represents the steel rail cross-sectional area.
In the step (3), the method for calculating the balance length delta L of each casting billet of each molten steel is as follows:
smelting a casting number of steel rails as a research object, wherein the casting number is 1, 2, 3 and … … N for each furnace number in the smelting of N furnaces; the weight of the molten steel corresponding to each furnace is marked as G 1 、G 2 、G 3 、…… G N The casting time is divided into X-flow casting, and the length of a casting time drainage blank is D 1 The length of the casting tail blank is D 2 The residual molten steel in the tundish is D 3 ，
The total weight G of all molten steel of the casting time Total (S) ，G Total (S) =G 1 +G 2 +G 3 +……G N
The weight of the actual casting molten steel of the casting time is G Total 1 ，G Total 1 =G Total (S) -D 3
The length of each flow of cut casting blank of each furnace is recorded as L, and the length of each flow of casting blank of the 1 st furnace is recorded as L 1 The length of each casting blank of the Nth furnace is recorded as L N ；
The length of each casting blank of each furnace is recorded as L Nn The length of the 1 st casting blank of the 1 st furnace is L 11 The length of the 2 nd casting blank of the 1 st furnace is recorded as L 12 First, theThe length of the nth casting blank of the 1 furnace is recorded as L 1n The method comprises the steps of carrying out a first treatment on the surface of the The length of the 1 st casting blank of the Nth furnace is recorded as L N1 The length of the 2 nd casting blank of the Nth furnace is recorded as L N2 The length of the nth casting blank of the nth furnace is recorded as L Nn ；
Thus: l (L) 1 =L 11 +L 12 +……L 1n
L N =L N1 + L N2 + …… L Nn
The length of the actual casting blank of the casting time is as follows:
L total (S) = （L 1 +L 2 +L 3 +……+L N +D 1 +D 2 ）*X
The average meter weight of the casting blank of the casting molten steel casting is g m， g m =G Total 1 /L Total (S)
The length of the actual casting blank per flow of each furnace is L 0 = G/（g m * X）
The length of the actual casting blank per flow of the 1 st furnace is L 01 = G 1 /（g m * X）
The length of the actual casting blank of each flow of the Nth furnace is L 0N = G N /（g m * X）
Balance length per cast slab per molten steel furnace: Δl=l 0 - L。
Delta L is larger than 0, which indicates that the molten steel of the furnace has balance, part of molten steel participates in casting of a first casting blank of the next furnace, and the casting position of the molten steel of the next furnace is positioned behind the head of the first casting blank of the next furnace;
delta L is smaller than 0, which indicates that the molten steel in the furnace is insufficient for cutting all casting blanks, the molten steel in the next furnace participates in casting the last casting blank of the furnace, and the casting position of the molten steel in the next furnace is positioned before the head of the first casting blank in the next furnace;
and delta L is equal to 0, which indicates that the molten steel in the furnace just finishes casting the last casting blank cut by the furnace, no molten steel participates in casting of the next casting blank, the molten steel in the next furnace does not participate in casting of the last casting blank of the furnace, and the casting position of the molten steel in the next furnace is positioned at the head of the first casting blank in the next furnace.
The beneficial effects of the invention are as follows: according to the position of the flaw detection defect on the steel rail, the accurate length of the corresponding casting blank position from the molten steel casting of the furnace is calculated, the influence rule of the steel rail casting condition on the flaw detection of the steel rail can be accurately reflected, and a data reference is provided for optimizing the steel rail smelting process, so that the flaw detection qualification rate is improved.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below, and it is apparent that the described embodiments are a small part of the embodiments of the present invention, but not all embodiments, and all other embodiments obtained by a person skilled in the art without making any inventive effort based on the embodiments of the present invention are within the scope of the present invention.
A method for positioning flaw detection and flaw reporting positions of steel rails comprises the following steps:
(1) Firstly, calculating the distance P between the flaw detection and flaw detection position of the steel rail and the end part of the casting blank, wherein the distance P between the flaw detection and flaw detection position of the steel rail and the end part of the casting blank is represented by P, P= (C+E)/delta, wherein C represents the length of a crop in the rolling process of the steel rail, E represents the distance between the flaw detection and flaw detection position of the steel rail and the end part of the steel rail, and delta represents the compression ratio of the steel rail;
(2) Then calculating the flaw detection and flaw indication position of the steel rail and the length L of the end part of the first casting blank actually cut by the corresponding casting blank in the heat Cutting and cutting If the flaw detection and flaw indication steel rail casting blank is the nth steel rail cut in the furnace, L Cutting and cutting The length sum of the 1 st steel rail to the n-1 st steel rail is equal to the length sum of the furnace cutting, and P is added;
(3) Finally, calculating the length L of the end part of the casting blank cut by the flaw detection and flaw detection position of the steel rail and the actual casting position of the corresponding casting blank Real world ，L Real world = L Cutting and cutting ΔL, where ΔL represents the balance length per ladle of molten steel per ladle.
In the step (1), the steel rail compression ratio delta=a/B, wherein a represents the casting blank cross-sectional area, and B represents the steel rail cross-sectional area.
In the step (3), the method for calculating the balance length delta L of each casting billet of each molten steel is as follows:
smelting a casting number of steel rails as a research object, wherein the casting number is 1, 2, 3 and … … N for each furnace number in the smelting of N furnaces; the weight of the molten steel corresponding to each furnace is marked as G 1 、G 2 、G 3 、…… G N The casting time is divided into X-flow casting, and the length of a casting time drainage blank is D 1 The length of the casting tail blank is D 2 The residual molten steel in the tundish is D 3 ，
The total weight G of all molten steel of the casting time Total (S) ，G Total (S) =G 1 +G 2 +G 3 +……G N
The weight of the actual casting molten steel of the casting time is G Total 1 ，G Total 1 =G Total (S) -D 3
The length of each flow of cut casting blank of each furnace is recorded as L, and the length of each flow of casting blank of the 1 st furnace is recorded as L 1 The length of each casting blank of the Nth furnace is recorded as L N ；
The length of each casting blank of each furnace is recorded as L Nn The length of the 1 st casting blank of the 1 st furnace is L 11 The length of the 2 nd casting blank of the 1 st furnace is recorded as L 12 The length of the nth casting blank of the 1 st furnace is recorded as L 1n The method comprises the steps of carrying out a first treatment on the surface of the The length of the 1 st casting blank of the Nth furnace is recorded as L N1 The length of the 2 nd casting blank of the Nth furnace is recorded as L N2 The length of the nth casting blank of the nth furnace is recorded as L Nn ；
Thus: l (L) 1 = L 11 +L 12 +……L 1n
L N =L N1 + L N2 + …… L Nn
The length of the actual casting blank of the casting time is as follows:
L total (S) =（L 1 +L 2 +L 3 +……+L N +D 1 +D 2 ）*X
The average meter weight of the casting blank of the casting molten steel casting is g m， g m =G Total 1 /L Total (S)
The length of the actual casting blank per flow of each furnace is L 0 = G/（g m * X）
The length of the actual casting blank per flow of the 1 st furnace is L 01 = G 1 /（g m * X）
The length of the actual casting blank of each flow of the Nth furnace is L 0N = G N /（g m * X）
Balance length per cast slab per molten steel furnace: Δl=l 0 - L。
Delta L is larger than 0, which indicates that the molten steel of the furnace has balance, part of molten steel participates in casting of a first casting blank of the next furnace, and the casting position of the molten steel of the next furnace is positioned behind the head of the first casting blank of the next furnace;
delta L is smaller than 0, which indicates that the molten steel in the furnace is insufficient for cutting all casting blanks, the molten steel in the next furnace participates in casting the last casting blank of the furnace, and the casting position of the molten steel in the next furnace is positioned before the head of the first casting blank in the next furnace;
and delta L is equal to 0, which indicates that the molten steel in the furnace just finishes casting the last casting blank cut by the furnace, no molten steel participates in casting of the next casting blank, the molten steel in the next furnace does not participate in casting of the last casting blank of the furnace, and the casting position of the molten steel in the next furnace is positioned at the head of the first casting blank in the next furnace.
Examples:
smelting a casting U75V steel rail, wherein the casting total comprises 24 furnaces, the casting blank section is 280 mm/380 mm, and the casting blank section area A=1064cm 2 Length D of drainage casting blank 1 Length of tail cast strand D =6.5m 2 =5m, the tundish last remaining molten steel D 3 The cast rail was cast in five streams all at 15 tons, the weight of molten steel per furnace is shown in table 1, and the actual cut length per cast slab per furnace is shown in table 2.
The casting blank is rolled into 60N steel rail with the cross section area B= 77.01cm 2 Rail cut length c=1.5 m, rail compression ratio δ=a/b=13.8.
TABLE 1 weight of molten steel per furnace G
TABLE 2 cutting length per strand per furnace
From Table 1, the total weight G of the cast molten steel Total (S) ，G Total (S) =G 1 +G 2 +G 3 +……G 24 = 3387.223 tons.
The weight of the actual casting molten steel of the casting time is G Total 1 ，G Total 1 = G Total (S) -D 3 3387.223 tons-15 tons = 3372.223 tons.
From Table 2, the cut length L per strand per furnace was calculated, and the cut length per strand per furnace is shown in Table 3.
TABLE 3 cutting length per strand for each furnace
The total length L of the casting blank is cut by the casting time Total (S) = （L 1 +L 2 +L 3 +……+L N +D 1 +D 2 ）*X ，
L Total (S) = （26.44+39.7+31.76+……+22.49+6.5+5）*5= 4073.65 m
The average meter weight of the casting blank is as follows: g m ，g m =G Total 1 / L total = 3372.223 tons/4073.65 m= 0.8278 tons/m.
The length L of the casting blank actually cast per furnace of the casting time 0 = G/（g m * X) balance length per cast slab per molten steel in furnace: Δl=l 0 -L, actual length of each furnace strand L 0 And the balance of the heat molten steel delta L are shown in Table 4.
TABLE 4 casting length, cutting length and balance length of molten steel casting blank per furnace
(1) Calculation example 1
The steel rail is rolled by a No. 2 furnace No. 3 stream No. 1 casting blank, the flaw detection shows that the steel rail is damaged at a position 56m, and the calculated result of the distance from the pouring position is as follows:
the distance between the casting gap and the casting gap is P= (C+E)/delta= (56+1.5)/13.8=4.17 m
The 1 st casting blank is cut by the furnace, and the cutting distance of the scratch casting blank is L Cutting and cutting =4.17m
The last furnace (furnace 1) molten steel Δl=2.08m, where the reported wound is at a distance from the start-pouring position:
L real world = L Cutting and cutting -ΔL =4.17-2.08=2.09m
The distance between the flaw position of the steel rail and the casting blank casting position of the furnace is 2.09m.
(2) Calculation example 2
The steel rail is rolled by a steel rail of hundred meters by a steel rail of a 4 th furnace and a 4 th stream and 3 rd branch, the flaw detection shows that the 27.5m part of the steel rail is damaged, and the calculation result of the distance from the pouring position is as follows:
the reported wound is relative to the distance P from the casting blank, p= (c+e)/δ= (27.5+1.5)/13.8=4.17 m)
The casting blank is the 3 rd casting blank cut by the furnace, and the cutting distance of the scratch casting blank is L Cutting and cutting =cut 1 st strand length+cut 2 nd strand length+4.17m=7.94+7.94+4.17=17.87 m
The last furnace (furnace 3) molten steel DeltaL= -0.90m, the reported position distance relative to the casting position is:
L real world = L Cutting and cutting - ΔL =17.87 -（-0.90）= 18.77m
The distance between the flaw position of the steel rail and the casting blank casting position of the furnace is 18.77m.
(3) Calculation example 3
The 10 th furnace, the 2 nd stream and the 2 nd branch casting blank roll hundred meters of steel rails, and the flaw detection finds that the 63m position of the steel rail is damaged, and the calculated result of the distance from the pouring position is as follows:
the reported wound is relative to the distance P between the casting blank and the casting blank, P= (C+E)/delta= (63+1.5)/13.8=4.67 m
The casting blank is the 2 nd casting blank cut by the furnace, and the cutting distance of the scratch casting blank is L Cutting and cutting =cut 1 st strand length+4.67 m=7.94+4.67=12.61 m
The last furnace (ninth furnace) molten steel DeltaL= -0.68m, the reported position distance relative to the casting position is:
L real world = L Cutting and cutting - ΔL =12.61 -（-0.68）= 13.29m
The distance between the flaw position of the steel rail and the casting blank casting position of the furnace is 13.29m.
(4) Calculation example 4
Hundred-meter steel rails are rolled by a No. 16 furnace No. 5 and No. 4 casting blanks, flaw detection is carried out, and the flaw detection shows that the position of the steel rail 10 is reported, and the calculated result of the position distance from the casting position is as follows:
the reported wound is relative to the distance P between the casting blank and the casting blank, P= (C+E)/delta= (10+1.5)/13.8=0.83 m
The 4 th casting blank is cut by the furnace, and the cutting distance of the scratch casting blank is L Cutting and cutting =cut 1 st strand length+cut 2 nd strand length+cut 3 rd strand length+0.83 m=7.94+7.94+7.94+0.83=24.65 m
The last furnace (15 th furnace) molten steel DeltaL= -2.24m, the reported wound distance relative to the casting position is: l (L) Real world = L Cutting and cutting - ΔL =24.65 -（-2.24）= 26.89m
The distance between the flaw position of the steel rail and the casting blank casting position of the furnace is 26.89m.
Claims (3)
1. A method for positioning flaw detection and flaw reporting positions of steel rails is characterized by comprising the following steps:
(1) Firstly, calculating the distance P between the flaw detection and flaw detection position of the steel rail and the end part of a casting blank of a rolled steel rail, wherein the distance P between the flaw detection and flaw detection position of the steel rail and the end part of the casting blank of the rolled steel rail is represented by P, P= (C+E)/delta, wherein C represents the length of a cut end in the rolling process of the steel rail, E represents the distance between the flaw detection and flaw detection position of the steel rail and the end part of the steel rail, and delta represents the compression ratio of the steel rail;
(2) Then calculating the flaw detection and flaw indication position of the steel rail and the length L of the end part of the first casting blank actually cut by the corresponding casting blank in the heat Cutting and cutting If the flaw detection and flaw indication steel rail casting blank is the nth steel rail cut in the furnace, L Cutting and cutting The length sum of the 1 st steel rail to the n-1 st steel rail is equal to the length sum of the furnace cutting, and P is added;
(3) Finally, calculating the length L of the end part of the casting blank cut by the flaw detection and flaw detection position of the steel rail and the actual casting position of the corresponding casting blank Real world ，L Real world = L Cutting and cutting Δl, where Δl represents the balance length per ladle of molten steel per ladle;
the method for calculating the balance length delta L of each casting billet of each furnace of molten steel is as follows:
smelting a casting number of steel rails as a research object, wherein the casting number is 1, 2, 3 and … … N for each furnace number in the smelting of N furnaces; the weight of the molten steel corresponding to each furnace is marked as G 1 、G 2 、G 3 、…… G N The casting time is divided into X-flow casting, and the length of a casting time drainage blank is D 1 The length of the casting tail blank is D 2 The residual molten steel in the tundish is D 3 ，
The total weight G of all molten steel of the casting time Total (S) ，G Total (S) =G 1 +G 2 +G 3 +……G N
The weight of the actual casting molten steel of the casting time is G Total 1 ，G Total 1 =G Total (S) -D 3
The length of each flow of cut casting blank of each furnace is recorded as L, and the length of each flow of casting blank of the 1 st furnace is recorded as L 1 The length of each casting blank of the Nth furnace is recorded as L N ；
The length of each casting blank of each furnace is recorded as L Nn The length of the 1 st casting blank of the 1 st furnace is L 11 The length of the 2 nd casting blank of the 1 st furnace is recorded as L 12 The length of the nth casting blank of the 1 st furnace is recorded as L 1n The method comprises the steps of carrying out a first treatment on the surface of the The length of the 1 st casting blank of the Nth furnace is recorded as L N1 The length of the 2 nd casting blank of the Nth furnace is recorded as L N2 The length of the nth casting blank of the nth furnace is recorded as L Nn ；
Thus: l (L) 1 = L 11 +L 12 +……L 1n
L N = L N1 + L N2 + …… L Nn
The length of the actual casting blank of the casting time is as follows:
L total (S) =（L 1 +L 2 +L 3 +……+L N +D 1 +D 2 ）×X
Casting blank for casting molten steelAverage meter weight g m， g m =G Total 1 /L Total (S)
The length of the actual casting blank per flow of each furnace is L 0 = G/（g m ×X）
The length of the actual casting blank per flow of the 1 st furnace is L 01 = G 1 /（g m ×X）
The length of the actual casting blank of each flow of the Nth furnace is L 0N = G N /（g m ×X）
Balance length per cast slab per molten steel furnace: Δl=l 0 - L。
2. The method for locating the flaw detection and flaw detection position of the steel rail according to claim 1, which is characterized in that: in the step (1), the steel rail compression ratio delta=a/B, wherein a represents the casting blank cross-sectional area, and B represents the steel rail cross-sectional area.
3. The method for locating the flaw detection and flaw detection position of the steel rail according to claim 1, which is characterized in that:
delta L is larger than 0, which indicates that the molten steel of the furnace has balance, part of molten steel participates in casting of a first casting blank of the next furnace, and the casting position of the molten steel of the next furnace is positioned behind the head of the first casting blank of the next furnace;
delta L is smaller than 0, which indicates that the molten steel in the furnace is insufficient for cutting all casting blanks, the molten steel in the next furnace participates in casting the last casting blank of the furnace, and the casting position of the molten steel in the next furnace is positioned before the head of the first casting blank in the next furnace;
and delta L is equal to 0, which indicates that the molten steel in the furnace just finishes casting the last casting blank cut by the furnace, no molten steel participates in casting of the next casting blank, the molten steel in the next furnace does not participate in casting of the last casting blank of the furnace, and the casting position of the molten steel in the next furnace is positioned at the head of the first casting blank in the next furnace.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06339762A (en) * | 1993-05-31 | 1994-12-13 | Nippon Steel Corp | Method and device for controlling cutting of continuously cast slab |
| CN105458202A (en) * | 2015-12-03 | 2016-04-06 | 武汉钢铁(集团)公司 | Continuous casting sheet billet cutting tracking method |
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| JPS5724846A (en) * | 1980-07-22 | 1982-02-09 | Nippon Steel Corp | Flaw detecting method for hot steel slab |
| JP3000305B2 (en) * | 1991-05-30 | 2000-01-17 | 川崎製鉄株式会社 | Method for estimating surface defects of slab slab |
| AT510662B1 (en) * | 2010-08-13 | 2014-01-15 | Voestalpine Stahl Gmbh | DEVICE AND METHOD FOR DETECTING TOGETHER OF AT LEAST ONE FAULT POINT AND / OR AT LEAST ONE DIMENSION ON MATERIAL CONTESTED ON A HOT ROPE |
| CN103586433B (en) * | 2013-11-04 | 2016-01-20 | 南京钢铁股份有限公司 | A kind of method improving continuous casting steel billet head and tail base flaw detection qualification rate |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06339762A (en) * | 1993-05-31 | 1994-12-13 | Nippon Steel Corp | Method and device for controlling cutting of continuously cast slab |
| CN105458202A (en) * | 2015-12-03 | 2016-04-06 | 武汉钢铁(集团)公司 | Continuous casting sheet billet cutting tracking method |
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