专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

91. 发明专利

JPS5794522A METHOD FOR MANUFACTURING COLD ROLLED STEEL SHEET FOR DRAWING HAVING EXCELLENT DENT RESISTING PROPERTY 失效
公开(公告)号：JPS5794522A
公开(公告)日：1982-06-12
申请号：JP17027780
申请日：1980-12-04
申请人： NIPPON KOKAN KK
发明人： KUWAMOTO HIROSHI , IWATOU SHIYUUICHI , JITSUKAWA MASAHARU
IPC分类号： C21D9/46 , C21D9/48
摘要： PURPOSE:To obtain a cold rolled steel sheet for drawing having excellent dent resisting property by performing a water hardening on a steel strip after rapidly heating primarily them just before their cooling process terminates, and then, by applying an over aging treatment on them, in the course of continuous treatments of steel strips, and forming a hardened layer of a two-phase structure. CONSTITUTION:A steel strip is gradually cooled to a temperature from which the quenching starts in a primary cooling zone 6 of a continuous anealing furnace after passing through a heating zone 4 and a soaking zone 5. At the outlet side of the primary cooling zone 6, a rapid heating device 11 is installed, and only the surface layer of the strip is heated to a temperature higher than the A1 transformation point just before the cooling process terminates. Then, a water hardening is performed on the strip with a water hardening device 7, and a hardened layer of two-phase structure of martensite and ferrite is formed in the surface layer of the strip. The strip is then coiled by a real 10 after passing through an over aging treatment zone 8 and a final cooling zone 9. When this method is applied, cold rolled steel sheets for drawing having a high yielding point and an excellent dent resisting property are obtained.

92. 发明专利

JPS55164024A CONTINUOUS ANNEALING METHOD AND APPARATUS THEREFOR 失效
公开(公告)号：JPS55164024A
公开(公告)日：1980-12-20
申请号：JP7015679
申请日：1979-06-06
申请人： NIPPON KOKAN KK
发明人： FUKUOKA YOSHIKAZU , JITSUKAWA MASAHARU
IPC分类号： C21D1/00 , C21D1/26 , C21D9/56 , C21D9/573
摘要： PURPOSE:To make it possible to continuously anneal a soft cold rolled steel plate for drawing with excellent cold moldability and a high tensile cold rolled steel plate by the same apparatus through a mechanism wherein a gas jet cooling portion and a water cooling portion are provided together to a cooling mechanism within a continuous annealing apparatus of a steel plate and these portions are used by switching appropriately. CONSTITUTION:After a steel plate S is passed through a heating furnace 8 and a homogenously heating furnace 9 to heat said steel plate to about A1 transformation point, said steel plate S is passed through a gas jet cooling portion 10, a water cooling portion 11 to be cooled and entered into a water cooling apparatus 20, a drying apparatus 21 through a reheating furnace 16, an over ageing treatment zone 17, a gas cooling zone 18, thereafter passed through a skin pass machine 22 and wound on a reel 27. In this case, in annealing a high tensile steel plate, said steel plate is passed through the gas jet cooling portion 10 and the water cooling portion 11 and, in case of annealing a soft steel plate for drawing, said steel plate is cooled only by the gas jet cooling after cooling water within the water cooling chamber 12 is exhausted by operating a valve and said chamber 12 is filled by a gaseous cooling medium to stop the water cooling. The exhausted cooling water is transferred to a warm water pit and used by circulating when a high tensile steel plate is annealed.

93. 发明专利

JPS54118315A METAL BELT COOLING 失效
公开(公告)号：JPS54118315A
公开(公告)日：1979-09-13
申请号：JP2550978
申请日：1978-03-08
申请人： NIPPON KOKAN KK
发明人： FUKUOKA YOSHIKAZU , JITSUKAWA MASAHARU , ISHIOKA HIROYUKI , INOUE YOSHITAKA , HIROKAMI KATSUHIKO , IWASE KOUJI
IPC分类号： C21D9/573 , C21D11/00
摘要： PURPOSE:A high temperature strip advancing at a given velocity is contactually rotated by a rotating drum in which cooling water is circulated, whereby the strip is rapidly cooled at a desired cooling temperature by means of simple apparatus. CONSTITUTION:Cooling water is fed into the rotating drum 1 from one side and discharged from the other side. A high temperature strip 2 flowing at a given velocity is contiguously wound on the rotating drum 1 and rapidly cooled. The cooling rate of the strip 2 can be varied to a desired value, when the material and construction of the drum 1 is constant, by adjusting the temperature and flow rate of the cooling water. The final temperature of the strip 2 after water cool is adjusted to a desired value by changing the temperature and flow rate of cooling water and winding angle of the strip to the drum when the material and construction of the drum is unchanged. Such process enables the strip 2 to be cooled to a desired temperature at a cooling rate greater than 100 deg.C/sec which is heretofore unfeasible. The process further eliminates the need of reheating treatment after rapid cooling. The cost of installation and operation is minor.

94. 发明专利

JPS53130212A CONTROLLING METHOD FOR FORCED CONVECTIVE COOLING 失效
公开(公告)号：JPS53130212A
公开(公告)日：1978-11-14
申请号：JP4558277
申请日：1977-04-20
申请人： NIPPON KOKAN KK , CHUGAI RO KOGYO KAISHA LTD
发明人： KAMATA SHIYOUSEI , KURAISHI TATSUO , FUSHIMI NAOYA , FUKUOKA YOSHIKAZU , JITSUKAWA MASAHARU , IMOSE MASAYUKI
IPC分类号： C21D1/00 , C21D9/52 , C21D9/573 , C21D11/00
摘要： PURPOSE:To enable to perform the rapid and accurate control for temperature, by controlling the velocity of flow of the refrigerant of spouted fluid at the nozzle, etc. with the damper, by using the sheet thickness, line speed and production rate of the strip as the parameter.

95. 发明专利

JPS52136812A ROLL FOR PROCESS LINE 失效
公开(公告)号：JPS52136812A
公开(公告)日：1977-11-15
申请号：JP5377976
申请日：1976-05-13
申请人： NIPPON KOKAN KK
发明人： FUKUOKA YOSHIKAZU , JITSUKAWA MASAHARU , HIROKAMI KATSUHIKO , YURA MASAAKI
IPC分类号： F16C13/00 , B65G13/11 , B65G39/00 , B65G39/071 , C21D1/00 , C21D9/56
摘要： PURPOSE:To decide the shape of the roll with which the strip does not camber, by determining the amount of crown of the roll to be used and the length of the central flat part of the convex roll according to the shape of the strip and by seeking the amount of thermal crown, when the strip passes through the inside of the continuous annealing furnace.

96. 发明专利

JPS52114517A METHOD AND EQUIPMENT FOR TREATMENT OF ANNEALED COIL FOR COLD ROLLED ST EEL BELT 失效
公开(公告)号：JPS52114517A
公开(公告)日：1977-09-26
申请号：JP3139576
申请日：1976-03-24
申请人： NIPPON KOKAN KK
发明人： ASAKAWA HIROFUMI , FUKUOKA YOSHIKAZU , SHIOTSUKI MASAHIRO , JITSUKAWA MASAHARU , ARIMA KOUICHIROU
IPC分类号： B21B45/06 , C21D9/46 , C21D9/56 , C21D9/663
摘要： PURPOSE:To shorten the cooling time of the coil and, at the same time, to reduce the specialloss from the point of management with the omission of dehumidifying yard, etc., by cooling the coi coil extracted from the annealing furnace and removing the oxide coating generated on the surface of the coil.

97. 发明专利

JPH062907B2 失效
公开(公告)号：JPH062907B2
公开(公告)日：1994-01-12
申请号：JP5914388
申请日：1988-03-11
申请人： NIPPON KOKAN KK
发明人： NISHIMOTO AKIHIKO , HOSOYA YOSHIHIRO , TOMITA KUNIKAZU , URABE TOSHIAKI , JITSUKAWA MASAHARU
IPC分类号： C21D8/12 , C22C38/00 , C22C38/06

98. 发明专利

JPH05138214A SURFACE ROUGHENING DEVICE FOR COLD ROLLING ROLL 失效
公开(公告)号：JPH05138214A
公开(公告)日：1993-06-01
申请号：JP32956191
申请日：1991-11-18
申请人： NIPPON KOKAN KK , MITSUBISHI STEEL MFG , NIPPON OXYGEN CO LTD
发明人： KUWAMOTO HIROSHI , FUKUTAKE JUN , JITSUKAWA MASAHARU , MORI TOSHIKAZU , NISHIDA MASAKATSU , YONAMOTO HIKARI , SAWADA HIROYUKI
IPC分类号： B21B27/00 , B23H9/04 , B23K15/08 , B23K26/00 , F25D3/10
摘要： PURPOSE:To provide the surface roughening device to obtain the roll surface excellent in wear resistance by performing surface roughening by beam irradiation or electric discharge machining on the roll surface of the cold rolling roll and then, in a short time, performing sub-zero treatment to blow liquid nitrogen thereon. CONSTITUTION:A movable carriage 2 is provided on a screw feed axis 5 parallel to a rotation axis of a mechanism 1 to hold and rotate the roll A. A beam irradiation device 3 and a liquid nitrogen blowing device 4 are mounted on the movable carriage 2. When the roll A is rotated by the mechanism 1, the movable carriage 2 is fed along the roll A by rotating the axis 5 in synchronization therewith. The roll A surface is subjected to surface roughening by the device 3 on the movable carriage 2 and the liquid nitrogen is blown against the roll A surface by the device 4 on the same movable carriage 2. The liquid nitrogen can be blown in a short time after surface roughening.

99. 发明专利

JPH0361325A HOT ROLLING METHOD FOR HARD-TO-WORK MATERIAL 失效
公开(公告)号：JPH0361325A
公开(公告)日：1991-03-18
申请号：JP19669789
申请日：1989-07-31
申请人： NIPPON KOKAN KK
发明人： TANABE SHUNICHI , JITSUKAWA MASAHARU , AKAMATSU SHIGERU , JIROUMARU KAZUMI , MORI TOSHIKAZU , SHIRAISHI KAORU
IPC分类号： B21B1/22 , B21B3/02 , B21B45/00 , C21D8/02 , C21D8/12
摘要： PURPOSE:To allow the efficient rolling of a hard-to-work material even in a tandem line without using a reverse rolling or 2 cold rolling and 2 annealing method by heating a material to be rolled which is the hard-to-work material in a coil state at a low temp. and subjecting the material to warm rolling in a specific temp. range. CONSTITUTION:The material to be rolled is heated at the low temp. in the coil state and is then warm rolled at 70 to 200 deg.C at the time of rolling of the hard-to-work material, such as electrical steel sheet, by using tandem mills for cold rolling, etc. Dummy materials are preferably connected to the front end and rear end of the material to be rolled prior to the above-mentioned low-temp. heating. The heating of the coil is preferably executed in a nonoxidative or weakly reducing atmosphere. The efficient rolling is executed in this way and the cooling in the inner and outer peripheral parts of the coil before the rolling after the heating is adequately prevented by the connection of the dummy materials.

100. 发明专利

JPH0361324A PRODUCTION OF SILICON STEEL SHEET 失效
公开(公告)号：JPH0361324A
公开(公告)日：1991-03-18
申请号：JP19669289
申请日：1989-07-31
申请人： NIPPON KOKAN KK
发明人： AKAMATSU SHIGERU , JITSUKAWA MASAHARU , TANABE SHUNICHI , KAKIMOTO HISAYOSHI , TERAUCHI TAKUMASA , MORI TAKASHI
IPC分类号： B22D11/00 , B22D11/12 , C21D8/12
摘要： PURPOSE:To prevent the occurrence of ridging at the surface of a cold rolled silicon steel sheet at the time of subsequent cold rolling by exerting hot rolling by heating a continuously cast slab in a specific temp.-rise pattern defined by the relationship with the casting temp. of a continuously cast slab at the time of hot-rolling a continuously cast slab as a stock for a silicon steel sheet. CONSTITUTION:At the time of heating, prior to hot rolling, a continuously cast slab as a stock for silicon steel sheet having a composition containing, by weight, >1.7% Si or >2.0% ([Si]+[Al]), the slab is heated and hot-rolled in a specific temp.-rise pattern in which, when t deg.C means the temp. difference between casting temp. and solidification temp. at the time of producing the continuously cast slab, the average heating rate V1 deg.C/min of the slab in a temp. region where the surface temp. of the continuously cast slab is =T deg.C, in the relation with the temp. T deg.C defined by T=900+10(t-5), satisfy V1=0.2t+2.4 and V2=0.02t+1.8. Then the resulting hot rolled plate is subjected to final cold rolling so as to be formed into a silicon steel sheet. By this method, the occurrence of ridging defect at the surface of the silicon steel sheet can be effectively prevented.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式