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1. 发明专利

JPH11293334A HEARTH ROLL FOR HEAT TREATING FURNACE AND ITS PRODUCTION 失效
公开(公告)号：JPH11293334A
公开(公告)日：1999-10-26
申请号：JP11591498
申请日：1998-04-13
申请人： NIPPON STEEL CORP
发明人： KURISU YASUSHI , ANDO KATSUMI
IPC分类号： C23C4/08 , C21D1/00 , C21D9/56 , C23C4/10
摘要： PROBLEM TO BE SOLVED: To provide a hearth roll for a heat treating furnace preventing the meandering of a strip to improve sheet passability and exhibiting excellent high temp. peeling resistance, high temp. wear resistance and build-up resistance. SOLUTION: This is a hearth roll 1 for a heat treating furnace arranged in a heat treating furnace, heat-treating a metallic strip and carrying it and, on the surface of a roll base metal 2, a heat insulating layer 4 composed of a quasi-crystalline alloy, a metallic layer 5 for bonding and an outermost surface layer 6 composed of ceramics or cermet are formed successively to laminate a coating layer 3. The metallic layer for bonding is preferably composed of an NiCr alloy or a CoCr alloy.

2. 发明专利

JPH1161369A MEMBER FOR HOT DIP METAL BATH AND ITS PRODUCTION 失效
公开(公告)号：JPH1161369A
公开(公告)日：1999-03-05
申请号：JP22772097
申请日：1997-08-25
申请人： NIPPON STEEL CORP
发明人： KURISU YASUSHI , ANDO KATSUMI
IPC分类号： C22C29/00 , B22F5/00 , B22F5/12 , B22F7/02 , C23C2/00 , C23C4/06
摘要： PROBLEM TO BE SOLVED: To improve corrosion resistance and wear resistance of a member used under an adversed condition like a roll journal part, which is immersed in a hot dip galvanizing bath, a hop dip Al bath, etc., and slides under a loading condition, and to extend a durable life in a continuous hot dip equipment, etc. SOLUTION: The hot dip metal bath member is formed with a dense cermet layer, which is made of a ceramic and heat resistant/corrosion resistant metal thermodynamically stable for a molten Al, on a base metal 10 surface, The ceramic preferably consists of one kind of two kinds or more among TiN, TiC, TiB2 , ZrN, ZrC, ZrB2 , NbC, VC, further, the heat resistant/corrosion metal preferably consists of Ti or Cr. The dense cermet layer is formed by a cladding by welding method, a thermal spray method and a HIP method, a member made of cermet only is formed by a HIP method. Equipment maintenance is made efficient and productivity of a hot dip steel sheet, etc., is improved.

3. 发明专利

JPH10260124A METHOD AND APPARATUS FOR FRICTION AND WEAR TEST 失效
公开(公告)号：JPH10260124A
公开(公告)日：1998-09-29
申请号：JP6768697
申请日：1997-03-21
申请人： NIPPON STEEL CORP
发明人： ANDO KATSUMI
IPC分类号： G01N3/56
摘要： PROBLEM TO BE SOLVED: To obtain a method and an apparatus in which the lubricating characteristic of a molten lubricant (a molten substance) as well as the friction and wear characteristic of a casting mold material can be evaluated by a method wherein the molten substance is injected between the outer circumference of a heated rotating cylinder and the contact face of a block and the rotational- speed waveform of the rotating cylinder is controlled. SOLUTION: A rotating cylinder 16 is turned by a servomotor 18, and a block 11 is pressed to the outer circumferential face of the rotating cylinder 16 by a cylinder 9. A molten substance 27p which is melted by a melting furnace 29 and whose temperature is 800 deg.C or higher is injected continuously, via an injection pipe 31, between the rotating cylinder 16 and the contact face of the block 11. The block 11 is pressed to the rotating cylinder 16 by a pressure load P, and the rotating cylinder 16 is turned. At this time, a frictional force F is measured by a load cell 10a, and the pressure load P is measured by a load cell 10b so as to be processed by a data processor 35, and a coefficient of friction μ= F/P is computed by a computing unit 24 so as to be recorded (or displayed) as data.

4. 发明专利

JPH10118830A STEEL SHEET SIDE TRIMMING DEVICE AND METHOD 失效
公开(公告)号：JPH10118830A
公开(公告)日：1998-05-12
申请号：JP28899596
申请日：1996-10-14
申请人： NIPPON STEEL CORP
发明人： KURISU YASUSHI , ANDO KATSUMI
IPC分类号： B23D19/06
摘要： PROBLEM TO BE SOLVED: To hold a steel sheet trim end face shape superior at all times by providing actuators for adjusting clearance and overlap of both rotary blades according to changes in size by grinding of each rotary blade and changes in quality and thickness of the sheet steel. SOLUTION: The circumferential faces of respective rotary blades 6, 7 are ground by a circumferential face grinding wheel 13a. The changes in blade sizes of respective rotary blades 6, 7 are detected based on the distance of blade face of the rotary blades 6, 7 measured by the detector 14. As for size change, an overlap actuator, a top clearance adjustment actuator 9, and the bottom clearance adjustment actuator 10 are driven so that the clearance and the overlap quantities of the both rotary blades 6, 7 are adjusted according to changes in the quality and thickness of the steel plate.

5. 发明专利

JPH07132460A GRINDING METHOD 失效
公开(公告)号：JPH07132460A
公开(公告)日：1995-05-23
申请号：JP27538193
申请日：1993-11-04
申请人： NIPPON STEEL CORP
发明人： ICHINOSE YUUSUKE , ANDO KATSUMI
IPC分类号： B24B5/37 , B23H3/02 , B23H5/00 , B23H5/06 , B24B53/00
摘要： PURPOSE:To consume an electrolytic current efficiently so as to suppress the excessive wear of a grinding wheel caused by electrolysis in the case of performing electrolytic dressing to the grinding wheel while grinding ground material by the grinding wheel. CONSTITUTION:While grinding ground material by rotating a grinding wheel 2 with extra-abrasive grains fixed thereto by conductive bond, a current is applied between the grinding wheel 2 and an electrode 3 provided nearby through an electrolyte 5 to perform electrolytic dressing to the grinding wheel 2. In such a grinding method, the ion quantity of the electrolyte before electrolytic dressing is compared with the ion quantity of the recovered electrolyte after electrolytic dressing, and an electrolytic current is controlled so that the elution quantity of the bond is in a range of 0.8-1.2 times of the set value.

6. 发明专利

JPH0544731A HIGH TEMPERATURE BEARING USING MOLTEN METAL AS LUBRICANT AND USING METHOD THEREOF 失效
公开(公告)号：JPH0544731A
公开(公告)日：1993-02-23
申请号：JP20181791
申请日：1991-08-12
申请人： NIPPON STEEL CORP
发明人： KATO YASUSHI , HORIKIRIKAWA KAZUO , ANDO KATSUMI
IPC分类号： F16C33/10 , F16C33/12 , F16C33/24
摘要： PURPOSE:To provide a high temperature bearing which can be stably used in a long time and a using method thereof, in high temperature atmosphere such as that in an atmosphere heat treatment furnace. CONSTITUTION:In a sealed bearing used in high temperature atmosphere, molten metal 6 having melting point under 800 deg.C such as lead, zinc, or aluminum is enclosed as lubricant. In the sealed sliding bearing, combination of ceramics on cermet as a fixed side member 2 and stainless steel as a rotation side member 4, is combination of ceramics as a fixed side member 2 and cermet as a rotation side member 4 is favorable. When combination of the fixed side member and the rotation member is respectively cermet and stainless steel, ceramics and cermet, or ceramics and ceramics, it is favorable that the ceramics is alumina or silicon nitride-sialon and the cermet is anticorrosion alloy containing carbide of high hardness.

7. 发明专利

JP2000094097A COOLING DRUM FOR TWIN DRUM TYPE THIN PLATE CONTINUOUS CASTING APPARATUS 失效
公开(公告)号：JP2000094097A
公开(公告)日：2000-04-04
申请号：JP27028298
申请日：1998-09-24
申请人： NIPPON STEEL CORP
发明人： KURISU YASUSHI , AZUMA YOSHIAKI , ANDO KATSUMI , YAMAJI CHIHIRO , UCHIDA HIDE
IPC分类号： B22D11/06 , B22D11/07
摘要： PROBLEM TO BE SOLVED: To enable the realization of a stable continuous casting for a long time by securing the stability of lubricity and sealness on the sliding surface between the end surfaces of cooling drums and a side weir. SOLUTION: In the cooling drums used for a twin drum type thin plate continuous casting apparatus provided with one pair of cooling drums 1a, 1b mutually rotated in the reverse direction and one pair of side weirs 2 abutted on both end surfaces of the cooling drums to form a shifting mold, on the end surface in contact with the side weir 2, a lubricating groove 7 opening at the end surface side having the range of 1-20 mm from the outer peripheral surface and 0.1-5 mm width, is formed in the peripheral direction and constituted so as to interpose lubricant into the sliding surface with the side weir by filling the lubricant 8 into this lubricating groove 7.

8. 发明专利

JPH11302746A HEARTH ROLL FOR CONTINUOUS ANNEALING FURNACE 失效
公开(公告)号：JPH11302746A
公开(公告)日：1999-11-02
申请号：JP12536098
申请日：1998-04-21
申请人： NIPPON STEEL CORP
发明人： ANDO KATSUMI , KURISU YASUSHI
IPC分类号： B65G39/00 , C21D1/00 , C21D9/56 , F27B9/24
摘要： PROBLEM TO BE SOLVED: To obtain a roll which simultaneously solves the problems of a slip, meandering, drawing of a steel plate and the build-up of the roll by and has an excellent wear resistance by providing the coefft. of friction of a steel sheet and the roll with directivity and specifying the ratio of the coefft. of friction in the axial direction and circumferential direction of the outer peripheral part of the roll to a specific range. SOLUTION: The ratio of the coefft. of friction in the axial direction and circumferential direction of the outer peripheral part of the roll is set at >=1.5. A grooved part 12 having a plurality of grooves is formed axially in the central portion in the axial direction of the outer periphery of the hearth roll 11. The roll surface exclusive the projecting part surface of the grooved part 12 and the grooved part 12 is formed from a smooth surface having a surface roughness Ra=0.1 to 3 μm and the area rate of the projecting part surface of the grooved part 12 is preferably set at 20 to 80%. The forming range in the axial direction of the grooved part 12 is set at >=80% of a straight part length La. As a result, the steel sheet flaws may be prevented and the quality improved.

9. 发明专利

JPH11290997A COOLING DRUM FOR TWIN DRUM TYPE CONTINUOUS THIN SHEET CASTING APPARATUS 失效
公开(公告)号：JPH11290997A
公开(公告)日：1999-10-26
申请号：JP9503398
申请日：1998-04-07
申请人： NIPPON STEEL CORP
发明人： KURISU YASUSHI , ANDO KATSUMI , YAMAJI CHIHIRO
IPC分类号： B22D11/06
摘要： PROBLEM TO BE SOLVED: To make it possible to lessen the wear and deformation of a cooling drum for twin drum type continuous casting of a thin sheet and to carry out continuous casting stable for a long period by forming the barrel part of the drum of material having a high thermal conductivity and forming the ends thereof of material having the hardness higher than the hardness of the barrel part. SOLUTION: The Cu alloy material having the thermal conductivity of >=350 W/mK is used for the barrel part of the cooling drum 1b and the Ni based super heat resistant alloy (high-hardness material) 8 is used for the projecting parts 1t. The sliding surfaces of side gates 2 are formed of, the material having the hardness lower than the hardness of the projecting parts 1t, e.g. ceramics of the hardness of Hv 50 to 300. The material which is the high- hardness material and has the hardness Hv of >=300 at room temp. is used for the projecting parts 1t. The projecting pats 1t may be formed to the hardness higher than twice the hardness of the cooling drum 1b by subjecting these parts to a nitriding treatment or carbonization treatment. The high-hardness material having the coefft. of thermal expansion of 50 to 120% that of the material of the cooling drum 1b is preferably welded to the cooling drum 1b. The drum may also be coated with the super high-hardness material at a thickness of 10 to 500 μm.

10. 发明专利

JPH11106834A COOLING ROLL FOR METALLIC STRIP AND METHOD FOR COOLING METALLIC STRIP 失效
公开(公告)号：JPH11106834A
公开(公告)日：1999-04-20
申请号：JP26595397
申请日：1997-09-30
申请人： NIPPON STEEL CORP
发明人： KURISU YASUSHI , ANDO KATSUMI , SUZUKI NORIYUKI , YAMAJI CHIHIRO
IPC分类号： B21B43/04 , B21B43/08 , C21D9/573
摘要： PROBLEM TO BE SOLVED: To provide a cooling roll which cools with lower heat conduction at fine project parts as low as possible so as to lower the temp. difference between the contact part with the fine projection and the non-contact part as low as possible and makes surer the uniform cooling in the width direction of a metallic strip and can realize the cooling without developing the flaw and the deterioration of shape in the metallic strip, in the case of cooling the metallic strip in the state of passing the strip by winding on the cooling roll having the fine projections and provided with a cooling structure in the inner part, and a cooling method. SOLUTION: In the cooling roll 3 for the metallic strip 1 having flowing passages of cooling medium 4 in the inner part, many fine projections 5 having 10-90 μm height and 8×10 -25.0 mm area of the contact surface are discontinuously arranged on the peripheral surface being in contact with the metallic strip and the total contact area ratio of the fine projections in the contact range with the metallic strip is made to 10-20%. The cooling method of the metallic strip is executed by using this cooling roll.

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