JPS5724846A - Flaw detecting method for hot steel slab - Google Patents
Flaw detecting method for hot steel slabInfo
- Publication number
- JPS5724846A JPS5724846A JP10037580A JP10037580A JPS5724846A JP S5724846 A JPS5724846 A JP S5724846A JP 10037580 A JP10037580 A JP 10037580A JP 10037580 A JP10037580 A JP 10037580A JP S5724846 A JPS5724846 A JP S5724846A
- Authority
- JP
- Japan
- Prior art keywords
- slab
- hot steel
- psc
- stored
- detected
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9093—Arrangements for supporting the sensor; Combinations of eddy-current sensors and auxiliary arrangements for marking or for rejecting
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Continuous Casting (AREA)
Abstract
PURPOSE:To readily detect internal defects of a hot steel salb, by a method wherein a hot steel slab is rolled at less than 5% rolling reduction in the directions other than the longitudinal one, an ultrasonic wave is excited in the hot steel slab by means of an electromagnetic ultrasonic transmitter-receiver, and the wave transmitted or reflected thereby is received. CONSTITUTION:The surface of a steel slab is treated by means of a descaler DC, and surface defects and internal defects are detected by flaw detectors SD and ID respectively. The defective parts are removed in a shear (a), and the slab is divided into pieces having a length for rolling. The sectional configuration of the slab is detected before the surface defect detection and stored in a processing computer PSC, while the temperature of the slab is detected and processed directly before the internal defect detection and stored in the computer PSC. The position of the slab is followed by counting the pulses generated by a synchronizing pulse generator which generates a transfer synchronizing pulse at the rate of one pulse per prescribed length feed of the slab. The configuration data and temperature data are stored in the computer PSC, being made to correspond to the detection positions on the slab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10037580A JPS5724846A (en) | 1980-07-22 | 1980-07-22 | Flaw detecting method for hot steel slab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10037580A JPS5724846A (en) | 1980-07-22 | 1980-07-22 | Flaw detecting method for hot steel slab |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5724846A true JPS5724846A (en) | 1982-02-09 |
Family
ID=14272275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10037580A Pending JPS5724846A (en) | 1980-07-22 | 1980-07-22 | Flaw detecting method for hot steel slab |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5724846A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013223083A1 (en) | 2013-11-13 | 2015-05-13 | Sms Siemag Ag | Method and device for contactless checking of the condition of a metallurgical cast product |
| CN114054703A (en) * | 2021-11-05 | 2022-02-18 | 邯郸钢铁集团有限责任公司 | Steel rail flaw detection and flaw reporting position positioning method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS519048A (en) * | 1974-07-12 | 1976-01-24 | Nippon Steel Corp | RENZOKUCHUZOCHUHENNO KANETSUROSONYUHOHO |
| JPS5225688A (en) * | 1975-08-21 | 1977-02-25 | Nippon Steel Corp | Hot ultrasonic probe |
-
1980
- 1980-07-22 JP JP10037580A patent/JPS5724846A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS519048A (en) * | 1974-07-12 | 1976-01-24 | Nippon Steel Corp | RENZOKUCHUZOCHUHENNO KANETSUROSONYUHOHO |
| JPS5225688A (en) * | 1975-08-21 | 1977-02-25 | Nippon Steel Corp | Hot ultrasonic probe |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013223083A1 (en) | 2013-11-13 | 2015-05-13 | Sms Siemag Ag | Method and device for contactless checking of the condition of a metallurgical cast product |
| WO2015071018A1 (en) | 2013-11-13 | 2015-05-21 | Sms Siemag Ag | Method and device for contactless testing of the quality of a metallurgical casting product |
| CN114054703A (en) * | 2021-11-05 | 2022-02-18 | 邯郸钢铁集团有限责任公司 | Steel rail flaw detection and flaw reporting position positioning method |
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