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1. 发明专利

JPS5340582A SURFACE FLAW DETECTOR FOR REDDHOT METALLIC MATERIAL 失效
公开(公告)号：JPS5340582A
公开(公告)日：1978-04-13
申请号：JP8178476
申请日：1976-07-09
申请人： NIPPON KOKAN KK , FUJI TOYUKI KK , YAMADA KATSUYA
发明人： OOSUMI ATSUSHI , DAIKO KAORU , YAMAGISHI KIYOTADA , YAMAMOTO TOMIO , YAMADA KATSUYA
IPC分类号： G01N21/89 , G01N21/892 , G01N25/72

2. 发明专利

JPS53138389A DETECTING METHOD OF SURFACE FLAWS 失效
公开(公告)号：JPS53138389A
公开(公告)日：1978-12-02
申请号：JP5331277
申请日：1977-05-10
申请人： NIPPON KOKAN KK , FUJI TOYUKI KK
发明人： OOSUMI ATSUSHI , YAMAGISHI KIYOTADA , DAIKO KAORU , YAMAMOTO TOMIO
IPC分类号： G01N21/89 , G01N21/892

3. 发明专利

JPS5481890A SURFACE FLAW DETECTOR FOR REDDHOT METAL MATERIAL 失效
公开(公告)号：JPS5481890A
公开(公告)日：1979-06-29
申请号：JP14884477
申请日：1977-12-13
申请人： NIPPON KOKAN KK , FUJI TOYUKI KK
发明人： OOSUMI ATSUSHI , YAMAGISHI KIYOTADA , DAIKO KAORU , YAMAMOTO TOMIO , SENO KOUJI , ISHIDA ITOSHIROU , HANABUSA HIDEYUKI
IPC分类号： G01N21/89 , G01N21/892

4. 发明专利

JPS5460228A TESTING OF SCARS ON RED HOT STEEL SURFACE BY DESCALING 失效
公开(公告)号：JPS5460228A
公开(公告)日：1979-05-15
申请号：JP12648877
申请日：1977-10-21
申请人： NIPPON KOKAN KK , FUJI TOYUKI KK
发明人： OOSUMI ATSUSHI , YAMAGISHI KIYOTADA , DAIKO KAORU , YAMAMOTO TOMIO
IPC分类号： B21B45/00 , B21C43/00 , G01N21/89 , G01N21/892
摘要： PURPOSE:To make a highly accurate scar detection by specifically designating the time of scar detection after descaling in case where the surface scar of red hot steel is optically tested after descaling. CONSTITUTION:Test on the surface scars of steel is made by the irradiation of a strong light onto the surface of steel from the outside within a time zone ranging from a time when temperature is restored to approx. 60 % of the difference (td = T1 - To) between the surface temperature (to) of steel immediately after the passage of descaler and the surface temperature(t1) of steel at the time of complete heat restoration to a time (10 to 20 second) when the surface temperature of steel is completely restored by its internal possessive heat after the scale formed on the surface of red hot steel is removed by blasting high pressure water from descaler.

5. 发明专利

JPS5530324A BLOOM ROLLING METHOD 失效
公开(公告)号：JPS5530324A
公开(公告)日：1980-03-04
申请号：JP10232878
申请日：1978-08-24
申请人： NIPPON KOKAN KK
发明人： HIRASAWA TAKESHI , SHIYOUDA SADAKAZU , YAMAGISHI KIYOTADA , HAGA YUKIO , SHIROYAMA AKIRA
IPC分类号： B21B1/02
摘要： PURPOSE:To prevent depression at the center of width and surface defects such as crease, flaws etc. by providing convex arched portion and convex portion at the center of the surface of roll for thickness direction pressing down that follows the roll for width direction pressing down, and rolling successively by the former roll, the latter roll and then flat roll. CONSTITUTION:The rolled material 2 pressed down in width direction by the box type caliber roll 1 is pressed down in thickness direction by the roll 4 for width direction pressing down that has a arched portion (convex portion) 4 at the center of the surface, and upper and lower faces in the thickness direction come in contact with the surface of roll 4. Then, the rolled material 2 is pressed down in thickness direction by the flat roll 3, and becomes a rolled material free from width direction thickness shrinckage and surface defects such as crease, flaws etc.

6. 发明专利

JPS5557301A PRODUCTION OF THICK STEEL PLATE 失效
公开(公告)号：JPS5557301A
公开(公告)日：1980-04-28
申请号：JP12853578
申请日：1978-10-20
申请人： NIPPON KOKAN KK
发明人： YAMAGISHI KIYOTADA , HIRASAWA TAKESHI
IPC分类号： B21B1/02 , B21B1/38
摘要： PURPOSE:To increase the rolling pressure in the central part of rolling blank and produce the thick steel plate of high quality free from loose structure, etc. by providing serrations to roughing rolls and rolling the blank with these rolls then rolling the same flat. CONSTITUTION:Steel ingot 4 is rolled with serrated rolls 5 which comprise providing serrations of convex or concave form of more than 10mm in diameteral difference to roughing rolls, by which a blank 6 of convex or concave form in section is made. Next, this is rolled with flat rolls 7 to a flat blank or thick steel plate 8. This method increases the rolling pressure in the central part of the blank of the specific range, and causes the casting structure in the central part of the steel ingot of the specific range to be well forged.

7. 发明专利

JPS5468721A BOTTOM CASTING INSTALLATION 失效
公开(公告)号：JPS5468721A
公开(公告)日：1979-06-02
申请号：JP13604877
申请日：1977-11-12
申请人： NIPPON KOKAN KK
发明人： TAGUCHI KIYOMI , HANMIYOU MASAYUKI , MATSUDA YASUHIRO , KOYANAGI DAIJIROU , YAMAGISHI KIYOTADA , WAKAMATSU IKUO
IPC分类号： B22D7/06 , B22C7/06 , B22C21/06

8. 发明专利

JPS55106601A MANUFACTURE OF SLAB FOR THICK STEEL PLATE BY CONTINUOUS CASTING 失效
公开(公告)号：JPS55106601A
公开(公告)日：1980-08-15
申请号：JP99079
申请日：1979-01-11
申请人： NIPPON KOKAN KK
发明人： OKADO TSUYOSHI , FUJITA YONEAKI , ARIIZUMI TAKASHI , HIRASAWA TAKESHI , YAMAGISHI KIYOTADA
IPC分类号： B21B1/00 , B21B1/02 , B21B1/38 , B21B1/46 , B22D11/12
摘要： PURPOSE:To increase the rolling pressure for the middle part of the material, and to improve the effect of pressure welding for the porosity, by giving material the strong reduction with the stepped rolls and flat rolls, while the bloomed slab still keeping a temperature difference between its surface and central zone. CONSTITUTION:While the continuously cast and bloomed slab still keeps a temperature difference between its surface and central zone, a strong reduction is given by the stepped rolls 1 to the middle part A of the material 2. Hereby, the compression stress acting in the longitudinal direction of the sheet generates at the part A, and the tensile stress generates at the part B being left free from above reduction, and the compression stress of the part A increases. Next, the material 2 is rolled by the flat rolls 3, and the part B receives reduction under the compression stress acting in the longitudinal direction of the sheet, and a high rolling force can be obtained. According to this method, the porosity at the central zone of the slab is effectively pressure welded, and the cast structure is efficiently forged; as a result, the manufacturing limit for the sound, high equality thick steel plate is widened.

9. 发明专利

JPS54155161A CONTINUOUS ROLLING METHOD FOR RODDHOT STEEL MATERIAL 失效
公开(公告)号：JPS54155161A
公开(公告)日：1979-12-06
申请号：JP6458578
申请日：1978-05-30
申请人： NIPPON KOKAN KK
发明人： DAIKO KAORU , YAMAGISHI KIYOTADA , TSURU MASAHIRO
IPC分类号： B21B1/00 , B21B1/02 , B21B45/00
摘要： PURPOSE:To make unnecessary the cooling and reheating of a great part of steel materials, and to make possible the excellent energy saving, by detecting the surface flow of the red-hot material under the hot condition, and by removing the steel material including the harmful flaw out of the line, in case of the continuous rolling of the red-hot steel material. CONSTITUTION:The ingot is heated in the soaking pit up to the specified temperature, and is bloomed; after that, the flaw of the ingot is removed by the hot scarfer, depending on the scarfing depth being decided according to the result of the flaw test by the well-known flaw tester. If the flaw is so significant as to exceed the maximum capable scrfing depth of the hot scarfer, the ingot is sheared if necessary, and is tested by the flaw tester; hereupon, the ingot still including the harmful residual flaw is removed out of the line, and is treated by the conventional method; thereby, a great part of slabs (about 90%) can be rolled into the product without nesessity of the cooling and reheating process, so that the cooling for only the testing purpose like as the conventional method becomes unnecessary, and the vast heat energy can be saved.

10. 发明专利

JPS5794514A METHOD FOR RECOVERING WASTE HEAT 失效
公开(公告)号：JPS5794514A
公开(公告)日：1982-06-12
申请号：JP16967180
申请日：1980-12-03
申请人： NIPPON KOKAN KK
发明人： ODOI AKIO , YAMAGISHI KIYOTADA , OOTSUKI MITSURU , MAEDA TOMOO , YAMATE YOSHITOMO
IPC分类号： F23L15/04 , C21D1/00 , F23K5/00 , F23L15/00 , F27D17/00 , F28F27/02
摘要： PURPOSE:To improve heat recoveries of waste gases when preheating a combustion air and a fuel gas with a high temperature waste gas from a box type annealing furnace, by supplying the waste gas to each heat exchanger proportionally to the thermal capacity of the air and gas to be preheated. CONSTITUTION:When batch annealings are performed on a strip coil 2, etc., with a box type annealing furnace, heat exchangers 6 for preheating a combustion air for heating the annealing furnace and another type heat exchangers 6a for preheating a fuel gas for heating the annealing furnace are respectively installed in parallel along the outer circumference of a heating cover 1 with 120 deg. angle interval by waste gas ports 5, 5. The coil 2 is heated and annealed through an inner cover 3 with a high temperature gas burnt by a burner 4 and the high temperature waste gas is supplied to each heat exchanger 6 and 6a after it is divided in accordance with the thermal capacity of the fuel gas and the combustion air to be supplied to the burner 4. In this way, the waste heat of the waste gas is effectively absorbed into the combustion air and fuel gas, and thus, the waste heat is recovered.

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