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21. 发明专利

JPH06330278A POWDERY COMPOSITION HAVING RESISTANCE TO REACTION WITH MOLTEN METAL, METHOD FOR UTILIZING THE SAME AND BODY UTILIZING THE SAME 失效
公开(公告)号：JPH06330278A
公开(公告)日：1994-11-29
申请号：JP11507393
申请日：1993-05-17
申请人： NIPPON STEEL CORP
发明人： ONO KEIICHIRO , TSUYUKI AKIRA , AMANO MASAHIKO
IPC分类号： C23C2/00 , C23C4/04
摘要： PURPOSE:To obtain a powdery compsn. for forming a coating having resistance to a reaction with a molten metal, corrosion and wear resistance, and to provide a method for forming such a coating and a coated member. CONSTITUTION:The objective powdery compsn. is a uniform mixture of zirconia particles perfectly or partially stabilized with an oxide selected among CaO, Y2O3, MgO, CeO2 and HfO2 with zirconium silicate particles. When the powdery compsn. is thermally sprayed on a metallic substrate, an undercoat is previously stuck on the substrate and the compsn. is thermally sprayed on the undercoat to form a coating having resistance to a reaction with a molten metal and consisting of ZrO2.X (X is at least one kind of oxide selected from among CaO, Y2O3, MgO, CeO2 and HfO2) and ZrSiO4 and/or decomposed products thereof (ZrO2 and SiO2) when the stuck state is recognized by X-ray phase analysis.

22. 发明专利

JPH06306560A PLAIN BEARING FOR CONTINUOUS HOT-DIP METAL COATING BATH ROLL 失效
公开(公告)号：JPH06306560A
公开(公告)日：1994-11-01
申请号：JP11922593
申请日：1993-04-23
申请人： NIPPON STEEL CORP
发明人： ONO KEIICHIRO
IPC分类号： C23C2/00 , F16C13/02 , F16C17/14
摘要： PURPOSE:To improve the cracking resistance of a ceramic bearing. CONSTITUTION:This bearing is a sliding bearing for continuous hot-dip metal coating bath roll where a block-like ceramics 10 whose shape, on the internal surface side to be allowed to slide on a shaft, has a curved surface is partially disposed only in a direction where the bearing is subjected to load. The ceramics 10 is inserted into a metallic bearing base 11, where only the part for holding the ceramics 10 is scooped out, and held by it. A semicylindrical or partially cylindrical bearing is divided in a peripheral direction, and only the divided section in a direction where the bearing is subjected to load is composed of ceramics and the other section is composed of metal.

23. 发明专利

JPH0584510A MECHANICAL DISCALING METHOD AND ITS SCALE BREAKER 失效
公开(公告)号：JPH0584510A
公开(公告)日：1993-04-06
申请号：JP8720791
申请日：1991-03-28
申请人： NIPPON STEEL CORP
发明人： KUTOGI YUKIHARU , OOTSUBO TOSHINORI , KAKO TAKUZO , ONO KEIICHIRO
IPC分类号： B21B45/06 , B21B45/08 , B23P9/04
摘要： PURPOSE:To remove scales on both surfaces of a material to be worked without scratching the surfaces. CONSTITUTION:A scale breaker 4 is preliminarily set so that an envelope curve which is generated with the tip parts of striking bodies is overlapped >=5mm on the surface of slab 1 or bloom. The scale breaker 4 has the striking bodies which are arranged freely movably in the circumferential direction of rotary shafts on the periphery of the rotary shaft at constant intervals. A slab or bloom cooled with a cooling means enters the scale breaker and, when its tip reaches a prescribed position, the revolving striking bodies which is at the ascended position are moved to the overlapping position and then scales are crushed while transporting the slab or bloom. After completion of crushing scales, the slab or bloom is transported in the direction of a rolling mill 6 and scales are removed in the transportign process by injecting high-pressure water from the devices 5 on the surfaces of slab or bloom.

24. 发明专利

JPH04290613A UNIVERSAL JOINT IN MELTED METAL 失效
公开(公告)号：JPH04290613A
公开(公告)日：1992-10-15
申请号：JP7818191
申请日：1991-03-19
申请人： NIPPON STEEL CORP
发明人： ONO KEIICHIRO , ANDO KATSUMI
IPC分类号： F16D3/26 , F16D3/38 , F16D3/40
摘要： PURPOSE:To improve the quality of a plated steel sheet by elongating the life of a universal joint used in melted metal, rotating stably an exit roll for a long period of time. CONSTITUTION:A cross pin 11 shaft portion 12 is made slip bearing structure, and a shaft side material is made of a carbide cermet or a carbide deposition hardening type heat resistance alloy, and a yoke hole side member is made of ceramics, and these are the features of this cross pin type universal joint in melted metal.

25. 发明专利

JPH02197327A METHOD AND DEVICE FOR O PRESS OF UO STEEL PIPE 失效
公开(公告)号：JPH02197327A
公开(公告)日：1990-08-03
申请号：JP1485889
申请日：1989-01-24
申请人： NIPPON STEEL CORP
发明人： ONO KEIICHIRO , AOKI HIROMICHI
IPC分类号： B21D5/01
摘要： PURPOSE:To simply and at a low cost execute O press of UO steel pipes of various outside diameters by constraining the side face of an object to be worked by an auxiliary die provided along the die longitudinal direction between the upper and the lower dies, and bringing it to press forming to a cross section longitudinal pipe shape. CONSTITUTION:A U-shaped object to be worked 3 is brought to O press and formed to an O shape by the upper and the lower dies 1a, 1b, and thereafter, by welding its joint and expanding a pipe, a steel pipe of a round shape is obtained. In said UO steel pipe forming use O press, an auxiliary die 4 is provided along the die longitudinal direction between the upper and lower dies 1a, 1b. This auxiliary die 4 is installed in one of the dies 1a, 1b, and also, it is desirable that clearances A, A' at the time when press is completed becomes below 8 folds of plate thickness of the object to be worked 3, and an error B in the horizontal direction against a perpendicular line for linking die circular arc parts becomes within + or -4.5mm. By this auxiliary die 4, the side face of the object to be worked is constrained. In such a way, the work 3 to be worked can be formed to a cross section longitudinal pipe shape without generating buckling.

26. 发明专利

JPH01299723A MECHANICAL EXPANDER CONE 失效
公开(公告)号：JPH01299723A
公开(公告)日：1989-12-04
申请号：JP12637788
申请日：1988-05-24
申请人： NIPPON STEEL CORP
发明人： ONO KEIICHIRO , AOKI HIROMICHI
IPC分类号： B21D37/01 , B21D39/20 , C23C8/38 , C23C8/50
摘要： PURPOSE:To improve seizure resistance and impact resistance by forming a hardened layer of a specified depth through nitriding treatment on a surface layer after steel is formed as a base material. CONSTITUTION:The steel used as a base material for an expander cone is drastically excellent in strength and is not broken down though the draft force in expanding a tube increases remarkably. On one hand, a hardened layer of 0.15-1.5mm depth is formed by nitriding treatment to elevate its hardness and give lubricating properties. Consequently, seizure resistance and wear resistance are improved and, further, low friction characteristics, too, are secured. Besides, since compressive residual stress remains on the nitride layer, a fatigue strength of about 1.1 times that of the base material can be obtained.

27. 发明专利

JPH01299712A DIE FOR UO TUBE FORMING PRESS LINER 失效
公开(公告)号：JPH01299712A
公开(公告)日：1989-12-04
申请号：JP12637688
申请日：1988-05-24
申请人： NIPPON STEEL CORP
发明人： ONO KEIICHIRO , AOKI HIROMICHI
IPC分类号： B21D37/01 , B21D5/01 , C23C8/50
摘要： PURPOSE:To obtain a die for a press liner excellent in galling resistance and crack resistance by nitriding the surface of a rolled steel sheet and forming a hardened layer having a specified depth. CONSTITUTION:Weldable high tensile steel sheet is used as a die material for the liner and after the steel sheet is formed in the shape of a semi-cylinder, it is subjected to Tuftride treatment which is one of salt bath nitriding methods. When it is dipped in a salt bath at a specified temperature for a specified time, a hardened layer of 0.05-0.15mm thickness is formed by the Tuftride treatment on the surface layer of the die for the liner. Many dies 1 for the liner are generally stacked and used on a base die 2 and the stacking number of these dies is adjusted to obtain the necessary dimensions of the dies. When a material 3 to be worked which has been formed in a U shape is pressed, the plate end of an open part of the material to be worked necessitates wear resistance and anti galling property because it slips as if it bites the die surface. As a result, it is possible to obtain a die excellent in not only galling resistance and crack resistance but wear resistance and anti galling property.

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