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1. 发明专利

JPH07232208A EXTENSION ADAPTOR FOR DESCALING NOZZLE 失效
公开(公告)号：JPH07232208A
公开(公告)日：1995-09-05
申请号：JP6192294
申请日：1994-02-22
申请人： NIPPON KOKAN KK , SPRAYING SYST JAPAN KK
发明人： MATSUOKA TOSHIO , YAMAMOTO MASAKI , AKECHI KOSHIN
IPC分类号： B05B15/06 , B05B1/00 , B21B45/08
摘要： PURPOSE:To properly change the distance between a rolled steel sheet and a spray port and to effectively remove scale by changing the screwing depth of a fixed adaptor or the screwing depth of a tip assembly to an extension adaptor. CONSTITUTION:The extension adaptor 10 consists of an extension sleeve 11 connected to the fixed adaptor 20 and the main body 12 of the extension adaptor with which the fixed adaptor is surrounded. The upstream end side of the extension sleeve 11 is mounted while being screwed to the downstream end side of the fixed adaptor 20 which is directly attached to a supply header 21. And, the downstream end part of a strainer assembly 40 is mounted to the upstream end part of the extension sleeve 11. When liquid or water is supplied into the supply header 21, the liquid or water is spraied from the spray port 41 of the tip assembly 30 through the fixed adaptor 40 from the strainer assembly 40 and the flow passage 16 of the extension adaptor 10. At this time, by changing the screwing depth of the fixed adaptor 20 or the screwing depth of the tip assembly 30 to the extension adaptor 10, the distance between the rolled steel sheet and the spray port 41 is properly changed.

2. 发明专利

JPH04116139A DIE STEEL FOR PLASTIC MOLDING EXCELLENT IN MACHINABILITY 失效
公开(公告)号：JPH04116139A
公开(公告)日：1992-04-16
申请号：JP23242190
申请日：1990-09-04
申请人： NIPPON KOKAN KK
发明人： ABE NAKATSUGU , HIRABE KENJI , MATSUOKA TOSHIO , INAGAKI KIMIO , YAKO KAZUNORI , MATSUMOTO KAZUAKI
IPC分类号： C22C38/00 , C22C38/22
摘要： PURPOSE:To manufacture a die steel for plastic molding excellent in machinability by preparing a steel having a specified compsn. selectively contg. S, Pb and Te in which their amounts to be added are prescribed. CONSTITUTION:A steel contg., by weight, 0.30 to 0.55% C, 0.01 to 1.0% Si, 0.1 to 3.0% Mn, 7 to 12% Cr, 0.05 to 3.0% Mo, 0.005 to 0.10% Sol.Al and 0.002 to 0.05% TN, furthermore contg. >=2 kinds among 0.01 to 0.50% V, 0.005 to 0.50% Nb and 0.01 to 0.50% W and contg. one or more kinds among 0.01 to 0.15% S, 0.01 to 0.10% Pb and 0.005 to 0.2O% Te is prepd. In this way, the die steel for plastic molding having good wire cuttability and discharge machinability and excellent in machinability can be obtd.

3. 发明专利

JPH01143712A METHOD FOR COOLING STEEL SHEET 失效
公开(公告)号：JPH01143712A
公开(公告)日：1989-06-06
申请号：JP30393987
申请日：1987-11-30
申请人： NIPPON KOKAN KK
发明人： INOUE TOSHIYUKI , TERASAKI KOICHI , USUI SUEO , MATSUOKA TOSHIO
IPC分类号： C21D9/52 , B21B45/02
摘要： PURPOSE:To prevent a front end of a steel sheet from supercooling and to homogenize the material of the steel sheet and to improve the flatness thereof by injecting cooling water in a lower part after the front end of the steel sheet passes through on the cooling water header in the lower part. CONSTITUTION:The front end of the steel sheet is detected by a sensor 6 and thereafter the front end position of the steel sheet is calculated by a pulse transmitter connected to a table roll 1 to detect the extent of movement of the steel sheet and a computing element to compute the carrying distance of the steel sheet. At the same time, the front position of the steel sheet certifies by a current director of a driving motor for a dewatering squeezing roll 2 that the front end position of the steel sheet has passed through the dewatering squeezing roll 2 and the front end position is calculated from the position of the dewatering squeezing roll 2. When the front position calculated of the steel sheet has passed through on a lower cooling water heater 3 having a solenoid valve 4 opening and closing the lower cooling channel, the solenoid valve 4 is opened to inject the cooling water from the cooling water header 3. Hereby, the front end of the steel sheet does not scoop the lower cooling water to prevent the front end of the steel sheet from supercooling.

4. 发明专利

JPH04263013A HIGH HARDNESS FORMING DIE STEEL AND ITS PRODUCTION 失效
公开(公告)号：JPH04263013A
公开(公告)日：1992-09-18
申请号：JP4277191
申请日：1991-02-15
申请人： NIPPON KOKAN KK
发明人： MATSUMOTO KAZUAKI , SANPEI TETSUYA , ABE NAKATSUGU , MATSUOKA TOSHIO , YAKO KAZUNORI
IPC分类号： C21D8/00 , C22C38/00 , C22C38/16
摘要： PURPOSE:To obtain a steel material excellent in temp. resistance and having high hardness. CONSTITUTION:The objective steel is a high hardness forming die steel which has a composition consisting of, by weight, 0.05-0.20% C, 0.10-1.0% Si, 0.8-2.0% Mn, 2.5-3.5% Ni, 0.5-1.5% Al, 0.7-1.7% Cu, 0.1-0.5% Mo, and the balance Fe with inevitable impurities and can be obtained by finishing working at >=700 deg.C at the time of exerting hot working after heating, immediately performing cooling down to 525-575 deg.C for 1-100hr.

5. 发明专利

JPH04263041A STEEL FOR FORMING DIE HAVING HIGH HARDNESS AND ITS MANUFACTURE 失效
公开(公告)号：JPH04263041A
公开(公告)日：1992-09-18
申请号：JP4276991
申请日：1991-02-15
申请人： NIPPON KOKAN KK
发明人： MATSUMOTO KAZUAKI , SANPEI TETSUYA , ABE NAKATSUGU , MATSUOKA TOSHIO , YAKO KAZUNORI
IPC分类号： C21D8/00 , C22C38/00 , C22C38/16
摘要： PURPOSE:To manufacture a steel for a forming die having high hardness excellent in temp. resistance by subjecting a steel having a specified compsn. constituted of C, Si, Mn, Ni, Al, Cu, Mo, V and Fe to specified hot working, cooling and aging treatment. CONSTITUTION:A steel constituted of, by weight, 0.05 to 0.20% C, 0.10 to 1.0% Si, 0.8 to 2.O% Mn, 2.5 to 3.5% Ni, 0.5 to 1.5% Al, 0.7 to 1.7% Cu 0.1 to 0.5% Mo >0.5 to 1.2% V and the balance Fe with inevitable impurities is heated and is thereafter subjected to a hot working. At this time, the working is finished at >=700 deg.C. After the hot working, the steel is immediately cooled to 570 to 620 deg.C for 1 to 100hr. Thus, the steel for a forming die excellent in temp. resistance and having high hardness of about >=40 in HRC value can be obtd.

6. 发明专利

JPH04263040A STEEL FOR MOLDING DIE HAVING HIGH HARDNESS AND ITS MANUFACTURE 失效
公开(公告)号：JPH04263040A
公开(公告)日：1992-09-18
申请号：JP4276891
申请日：1991-02-15
申请人： NIPPON KOKAN KK
发明人： MATSUMOTO KAZUAKI , SANPEI TETSUYA , ABE NAKATSUGU , MATSUOKA TOSHIO , YAKO KAZUNORI
IPC分类号： C21D8/00 , C22C38/00 , C22C38/16
摘要： PURPOSE:To obtain a steel having high hardness of >=45 points in HRC value and useful as a steel for a die for plastic molding. CONSTITUTION:This is a steel for a die for molding having high hardness which is constituted of, by weight, 0.05 to 0.20% C, 0.10 to l.0% Si, 0.8 to 2.0% Mn, 2.5 to 3.5% Ni, 0.5 to 1.5% Al, 0.7 to 1.7% Cu, 0.1 to 0.5% Mo, >0.5 to 1.2% V and the balance Fe with inevitable impurities and obtained at the time of heating it and thereafter executing a hot working, by finishing the working at >=700 deg.C, thereafter immediately cooling it to

7. 发明专利

JPH03226305A CONTROL METHOD OF PLANAR SHAPE OF THICK STEEL PLATE ROLLING 失效
公开(公告)号：JPH03226305A
公开(公告)日：1991-10-07
申请号：JP29721990
申请日：1990-11-05
申请人： NIPPON KOKAN KK
发明人： KIKUCHI TAKANARI , YAMANE TAKAO , MATSUOKA TOSHIO
IPC分类号： B21B37/00 , B21B1/38 , B21B37/28 , B21B37/72
摘要： PURPOSE:To obtain a good rectangular planar shape by deciding the optimum dog-bone additional quantity in the way that the dog-bone quantity is determined by representing a planar shape using the function with the high degree of freedom that is called the third-order spline function and varying the roll gap. CONSTITUTION:The planar shape A of the (n)th pass becomes the rolled planar shape B of the (n+1)th pass. The planar shape is estimated with the third-order spline function, thus, the dog-bone quantity is made optimum. In this manner, the planar shape after the completion of rolling can be estimated with good accuracy. Then, the quantity of volume is filled up and the final shape is controlled in a rectangle by rolling after adding the volume corresponding to parts where are deviated from the rectangle of the estimated final shape preliminarily and individually on the distribution of thickness in the width direction and the distribution of width in the longitudinal direction to make the final planar shape into the rectangle. In this way, the optimum dog-bone quantity can be obtained and the good rectangular planar shape can be obtained. And, because the degree of freedom of representation is larger, the effect that the collation from a measured value to a model is easy is obtained.

8. 发明专利

JPH0578732A APPARATUS FOR REGULATING HARDENING OF TAIL END PART IN ROLLER QUENCHING BY HEAT TREATING FURNACE 失效
公开(公告)号：JPH0578732A
公开(公告)日：1993-03-30
申请号：JP23984891
申请日：1991-09-19
申请人： NIPPON KOKAN KK
发明人： SUGA NIZO , YAMADA SEIJI , MATSUOKA TOSHIO
IPC分类号： C21D1/00 , C21D1/18
摘要： PURPOSE:To improve the yield of a thick steel plate to be subjected to roller quenching treatment. CONSTITUTION:A thick steel plate is rapidly cooled by roller quenching treatment to obtain its hardened structure. At this time, the ejecting direction of final step nozzle headers 1 and 11 of cooling water rotates in an oscillating way, and cooling water is continuously poured on the thick steel plate 10 until the thick steel plate 10 is sent out by outlet pinch rolls 4 and 14 to improve its yield. The ejecting direction of the final step nozzle headers of cooling water rotates in an oscillating way, and cooling water is continuously poured on the thick steel plate to the last, by which the hardened structure can be obtd. to the tail end of the thick steel plate.

9. 发明专利

JPH04263043A STEEL FOR MOLDING DIE HAVING HIGH HARDNESS AND ITS MANUFACTURE 失效
公开(公告)号：JPH04263043A
公开(公告)日：1992-09-18
申请号：JP4277291
申请日：1991-02-15
申请人： NIPPON KOKAN KK
发明人： MATSUMOTO KAZUAKI , SANPEI TETSUYA , ABE NAKATSUGU , MATSUOKA TOSHIO , YAKO KAZUNORI
IPC分类号： C21D8/00 , C22C38/00 , C22C38/16
摘要： PURPOSE:To obtain hardness about 40 points in HRC value by subjecting a low Ni precipitation hardening steel to an aging treatment. CONSTITUTION:This is a steel for a molding die having high hardness which is constituted of, by weight, 0.05 to 0.20% C, 0.10 to 1.0% Si, 0.8 to 2.0% Mn, 1.8 to =700identical, thereafter immediately cooling it to

10. 发明专利

JPH04263042A STEEL FOR MOLDING DIE HAVING HIGH HARDNESS AND ITS MANUFACTURE 失效
公开(公告)号：JPH04263042A
公开(公告)日：1992-09-18
申请号：JP4277091
申请日：1991-02-15
申请人： NIPPON KOKAN KK
发明人： MATSUMOTO KAZUAKI , SANPEI TETSUYA , ABE NAKATSUGU , MATSUOKA TOSHIO , YAKO KAZUNORI
IPC分类号： C21D8/00 , C22C38/00 , C22C38/16
摘要： PURPOSE:To obtain a steel having high hardness of >=43 points in HRC value and useful as a steel for a die for plastic molding. CONSTITUTION:This is a steel for a forming die having high hardness which is constituted of, by weight, 0.05 to 0.20% C, 0.10 to 1.0% Si, 0.8 to 2.0% Mn, 2.5 to 3.5% Ni, 0.5 to 1.5% Al, 0.7 to 1.7% Cu, 0.1 to 0.5% Mo and the balance Fe with inevitable impurities and obtained at the time of heating it and thereafter executing a hot working by finishing the working at >=700 deg.C, thereafter immediately cooling it to

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