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1. 发明专利

JPH11108829A METHOD AND DEVICE FOR ONLINE ANALYSIS OF MOLTEN METAL 失效
公开(公告)号：JPH11108829A
公开(公告)日：1999-04-23
申请号：JP28114397
申请日：1997-09-30
申请人： NIPPON KOKAN KK
发明人： AKIYOSHI TAKANORI , SAKASHITA AKIKO , ISHIBASHI YOICHI , CHINO ATSUSHI , MAEKAWA TOSHIYA
IPC分类号： G01N33/20 , G01N21/31
摘要： PROBLEM TO BE SOLVED: To permit the analysis of the concentration of an element in molten metal by irradiating the surface of the molten metal with both laser light with an output wavelength adjusted to the absorption wavelength of the element and reference laser light and measuring a reference wavelength in reflected light and the laser light intensity of the absorption wavelength. SOLUTION: Laser light with a reference wavelength generated by a device 12 for emitting laser light with a reference wavelength is condensed by a condensing lens 2 via a beam splitter 13 and is brought to be incident onto an optical fiber 3 together with laser light with an absorption wavelength generated by a device 1 for emitting laser light with an absorption wavelength. The laser light with a reference wavelength and laser light with an absorption wavelength which come out of the other end of the optical fiber 3 are passed through a metallic vapor phase 8 and reflected at the surface of molten metal 9. The reflected laser light is passed through the optical fiber 3 and guided to a photo detector 6. In the photo detector 6, the intensities of the laser light with a reference wavelength and the laser light with an absorption light at each wavelength are measured to obtain the concentration of an element to be analyzed in the metallic vapor phase 8.

2. 发明专利

JP2870364B2 失效
公开(公告)号：JP2870364B2
公开(公告)日：1999-03-17
申请号：JP15941693
申请日：1993-06-29
申请人： NIPPON KOKAN KK
发明人： MOCHIZUKI TADASHI , ISHIBASHI YOICHI , AKYOSHI TAKANORI , IWATA YOSHITO , JODAI TETSUSHI , SAKASHITA AKIKO
IPC分类号： G01N1/02 , G01N1/28 , G01N21/31 , G01N21/63 , G01N21/71

3. 发明专利

JPH09101246A LASER VAPORIZATION ANALYSIS 失效
公开(公告)号：JPH09101246A
公开(公告)日：1997-04-15
申请号：JP25638295
申请日：1995-10-03
申请人： NIPPON KOKAN KK
发明人： AKIYOSHI TAKANORI , ISHIBASHI YOICHI , SAKASHITA AKIKO , MOCHIZUKI TADASHI , SATO SHIGEOMI
IPC分类号： G01N21/73 , G01N1/28
摘要： PROBLEM TO BE SOLVED: To detect the quantity (concentration) of objective element for each existing state by determining the quantity of objective element contained in the uniform solid solution part and in the uneven aggregated part for each state from the micro time measurement of particulate component being taken while shifting the analyzing position continuously. SOLUTION: When a sample 1 in a micro area ΔS is evaporated and atomized while shifting the irradiating position in a micro time fit, a uniform solid solution part of objective component and the principal element of sample 1 is formed along with an uneven aggregated part 2 where the concentration of objective component is higher than that at the solid solution part. The region (solid solution part) ΔS2 , ΔS4 , ΔS6 , excluding the aggregated part 2 has uniform emission intensity It2 , It4 , It6 but the region ΔS1 , ΔS3 , ΔS5 , mixed with the aggregated part 2 has emission intensity It1 , It3 , It5 dependent on the extent of mixture. Since the uniform solid solution part can be separated from the aggregated part 2 by analyzing the emission intensity It in the micro time Δt, the quantity of objective component can be measured for each state from each emission intensity It.

4. 发明专利

JPH0968499A METHOD FOR QUICKLY JUDGING QUALITY OF SEAM CAST ARTICLE IN CONTINUOS CASTING OPERATION 失效
公开(公告)号：JPH0968499A
公开(公告)日：1997-03-11
申请号：JP24525795
申请日：1995-08-31
申请人： NIPPON KOKAN KK
发明人： MAEDA HIROSHI , IBUKI KAZUMI , AKIYOSHI TAKANORI , ISHIBASHI YOICHI
IPC分类号： G01N21/73 , B22D11/10 , B22D11/16 , G01N1/04 , G01N33/20
摘要： PROBLEM TO BE SOLVED: To determine the quality of a cast article quickly by cutting a continuously cast article by a specified amount across a seam thereof and analyzing the components in the center of cross-section of a precharge cast article and at the circumferential part of cross-section of a post-charge cast article through laser ICP analysis. SOLUTION: A continuously cast article is cut by a specified amount and a post-charge bottom cast article BA is delivered to an analytical stand 24 along with a precharge top cast article TF. The cast articles BA, TF are stopped at specified positions of the stand 24 and positioned by means of a positioning jig 15. A laser irradiating section 20 is then moved along a rail 18 from a laser housing room 14 and interposed between the cast articles BA, TF. Laser ICP analysis is then performed for the cast article TF at the center of cross-section thereof. Subsequently, the rotary table 16 of irradiating section 20 is turned and the surface layer on the cross-section of cast article BA is analyzed. Analysis is carried out for about 30sec under red heat state for both cases. Quality can be judged quickly based on the results thus enhancing the productivity.

5. 发明专利

JPH07159299A METHOD FOR DECIDING CAUSE OF SURFACE ABNORMALITY STEEL MEMBER 失效
公开(公告)号：JPH07159299A
公开(公告)日：1995-06-23
申请号：JP30997593
申请日：1993-12-10
申请人： NIPPON KOKAN KK
发明人： MOCHIZUKI TADASHI , ISHIBASHI YOICHI , AKIYOSHI TAKANORI , SAKASHITA AKIKO
IPC分类号： G01N21/73 , G01N1/28
摘要： PURPOSE:To grasp the compositional variation at an abnormal part positively by effecting line analysis at an appropriate depth at the abnormal part in order to determine the cause of surface abnormality of a steel member. CONSTITUTION:Line analysis is effected through laser evaporation analysis for exciting microparticles produced by irradiating with pulse laser light 2, wherein the depth of analysis is controlled by the pulse width, the peak output, and the moving speed of irradiating point. The line width can be selected arbitrarily by shifting the irradiating point in the line direction and the breadthwise direction. The irradiating point 9 is shifted by controlling the rotation of a reflector 3 and the translation of a condenser lens 5.

6. 发明专利

JPH06323969A METHOD AND APPARATUS FOR QUICKLY ANALYZING STEEL PIECE 失效
公开(公告)号：JPH06323969A
公开(公告)日：1994-11-25
申请号：JP11498293
申请日：1993-05-17
申请人： NIPPON KOKAN KK
发明人： AKIYOSHI TAKANORI , KAWAI YOSHIHIKO , ISHIBASHI YOICHI , MOCHIZUKI TADASHI , IWATA YOSHITO , JODAI TETSUSHI , SAKASHITA AKIKO
IPC分类号： G01N1/28 , G01N21/31 , G01N21/73 , G01N27/62
摘要： PURPOSE:To analyze the component of a steel piece including segregation components such as C, P and S quickly and highly accurately. CONSTITUTION:After the analyzing part of a steel piece 1 is cut with a cutting device 2, the part is covered with a particulate generating cell 6 having a sealing part 8. Ar gas is made to pass through the cell. The cell is cut again by the application of laser. The laser light at 100MW/cm or more having the oscillating frequency of 100Hz or more is applied on the steel piece, with the applying point being moved at least by 1mm square. Thus, the particulates are generated. The particulates are conveyed with the Ar gas and undergo ICP light emitting spectrochemical analysis. The thermal steel piece can be also analyzed by using heat resistance material for the sealing part. The selectivity of the picked-up components is decreased and the pickup speed is increased by limiting the laser applying conditions. The analyzing accuracy of the segregation component is improved by moving the applycation point. The value of the C analysis is obtained highly accurately by the secondary cutting, purification of the Ar gas and the prevention of contamination.

7. 发明专利

JPH10281999A METHOD AND DEVICE FOR LASER ANALYSIS OF MOLTEN STEEL ELEMENT 失效
公开(公告)号：JPH10281999A
公开(公告)日：1998-10-23
申请号：JP10249397
申请日：1997-04-04
申请人： NIPPON KOKAN KK
发明人： AKIYOSHI TAKANORI , SAKASHITA AKIKO , ISHIBASHI YOICHI
IPC分类号： G01N21/73 , G01N1/28 , G01N33/20
摘要： PROBLEM TO BE SOLVED: To attain prompt measurement which is not influenced by CO or the like by irradiating laser to molten steel, evaporating its part to form it into fine grains, conveying to an analyzing cell by inert gas, and laser-irradiating the fine grains so as to analyze molten steel elements. SOLUTION: This laser analyzing device which analyzes an element such as C or the like in molten steel is provided with a water-cooled sub-lance 11 fitted with a probe 3 or the like in a steel-making process with a converter. By bringing the front end of the sub-lance 11 near a molten steel surface, the laser light of a laser 1 for generating fine grains is irradiated to the molten steel surface through the probe 3. Inert gas such as Ar is introduced from a gas inlet pipe 5 to the probe 3, the fine steel grains generated by laser irradiation is sent from a gas outlet pipe 6 to an analyzing cell 8. The fine grains are accumulated on a filter provided in the cell 8, and separate CO or the like discharged from the molten steel 4 by cleaning gas. By irradiating the laser light to the fine grains to be emitted, C contents in the molten steel is measured. It is also possible to analyze Mn, P, S and the like.

8. 发明专利

JPH10213580A ANALYSIS METHOD FOR EACH PHASE OF AL IN STEEL 失效
公开(公告)号：JPH10213580A
公开(公告)日：1998-08-11
申请号：JP1525597
申请日：1997-01-29
申请人： NIPPON KOKAN KK
发明人： AKIYOSHI TAKANORI , SAKASHITA AKIKO , ISHIBASHI YOICHI , MOCHIZUKI TADASHI
IPC分类号： G01N21/73 , G01N1/28 , G01N33/20
摘要： PROBLEM TO BE SOLVED: To quantify the Al component in steel for each of acid soluble Al and acid insoluble Al. SOLUTION: A pulse laser beam is converged on the surface of a specimen, particle specimens are sampled for each minute time and for each minute area while a converged point is moved and introduced into an ICP analyzer, and a luminous intensity for each minute time is obtained. Though a variation resulting from the measurement and a variation resulting from the gradation of acid insoluble Al are contained in the strength I1 of any cumulative percentage of the cumulative frequency distribution of the luminous intensity, first I2 is obtained by the correction of the variation resulting from the measurement of acid soluble Al, and a correction of a variation resulting from the gradation of the acid insoluble Al is given to a difference between the average values I1 and I2 of the measured intensities. Thus the intensity of the acid insoluble Al can be obtained, and subtracted from the average value Im to obtain the intensity Is of the acid soluble Al.

9. 发明专利

JPH0949799A LASER VAPORIZATION ANALYZER 失效
公开(公告)号：JPH0949799A
公开(公告)日：1997-02-18
申请号：JP22256995
申请日：1995-08-07
申请人： NIPPON KOKAN KK
发明人： AKIYOSHI TAKANORI , ISHIBASHI YOICHI , SAKASHITA AKIKO , MAEKAWA TOSHIYA
IPC分类号： G01N27/64 , G01N21/73
摘要： PROBLEM TO BE SOLVED: To adequately and immediately analyze a composition of a component of a metallic material by means of a small-sized, economy and efficient analyzer of the metallic component utilizing a laser light without preparing a sample. SOLUTION: This device comprises a laser emission section having a semiconductor laser oscillator 1 as an excitation light source and continuously emitting a Q switch laser light by virtue of a solid laser medium, an acoustic optical deflection device 7 that collects the laser light from the laser emission section on a surface of a sample, a laser light collection lens 8 and a cell 9. An optical axis of the laser light is deflected so as to draw a plane by the acoustic optical deflection device 7 so that a collection point of the laser light emitted on a surface of a metallic material from the cell 9 is vibrated at a constant amplitude.

10. 发明专利

JPH08219987A METHOD FOR DETERMINING CONCENTRATION OF SN2+ ION 失效
公开(公告)号：JPH08219987A
公开(公告)日：1996-08-30
申请号：JP2523595
申请日：1995-02-14
申请人： NIPPON KOKAN KK
发明人： IDA IWAO , ISHIBASHI YOICHI
IPC分类号： G01N21/31
摘要： PURPOSE: To quickly and accurately determine the concentration of Sn ions by adding Cr ions of an excessively equivalent amount to Sm ions and obtaining the concentration of Sn ions from the obtained concentration of Cr ions. CONSTITUTION: An Sn plating liquid is passed through a filtration filter 3 by a feed pump 2. A filtered plating liquid 4 is sent to a six-way switch valve 12 by a feeding/quantifying pump 7 via a path switch valve 8. Then, 100μl of K2 Cr2 O7 sulfate solution (Cr :0.6mol/l, H2 SO4 :2.5mol/l) is measured by a measuring loop 11 and injected to the flow of the plating liquid 4 via the valve 12. As a result, the plating liquid 4 reacts when moving in a reaction tube 14, with creating Cr . The absorbance of X rays of a wavelength of 585nm absorbed only by Cr is measured by a spectrophotometer 15, and the concentration of Cr ions is obtained by a working curve. Accordingly, the concentration of Sn ions in the plating liquid 4 is obtained from the concentration of Cr ions.

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