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41. 发明专利

JPH10263752A METHOD FOR CONTINUOUSLY CASTING BEAM BLANK 失效
公开(公告)号：JPH10263752A
公开(公告)日：1998-10-06
申请号：JP7313097
申请日：1997-03-26
申请人： KAWASAKI STEEL CO
发明人： ANDO KENJI , TAOKA KEIZO , OKUDA HARUYUKI , SUDA MAMORU
IPC分类号： B22D11/00 , B22D11/12
摘要： PROBLEM TO BE SOLVED: To prevent the occurrence of warping at the flange part by heating the flange surface of a beam blank until the beam blank during continuously casting reaches the final solidification or a little after there from. SOLUTION: The beam blank 1 is cast with a continuous caster. The flange surfaces 6a of the beam blank 1 are heated in the heating section 5 arranged so as to interpose the lest solidified position 3 in the continuous caster. The temp. difference between the flange surfaces 6a and the last solidified part 8 is eliminated, and the warping of the flange part 6 can be prevented. The heating section 5 is desirable to be the interval between the position going up at 1500 mm and the position going down at 1000 mm in the casting direction from the last solidified position 3. In the case the heating position is the upstream side from the section, the solidification of the beam blank is delayed, and in the case the heating position is downstream side from this section, the prevention of warping is not enough. The temp. of the heating surface is desirable to 900-950 deg.C. When the temp is 950 deg.C, bulging, etc., is caused by deficient strength of the solidified shell.

42. 发明专利

JPH08104553A REFORMING METHOD OF STAINLESS STEEL SLAG 失效
公开(公告)号：JPH08104553A
公开(公告)日：1996-04-23
申请号：JP24116994
申请日：1994-10-05
申请人： KAWASAKI STEEL CO , KAWATETSU MINING
发明人： OSUGI HITOSHI , TAOKA KEIZO , YAMADA SUMIO , ASAHO RYUICHI , NISHIGORI MASANORI , SAKURATANI TOSHIKAZU , TOUBOU HIROYUKI , OKUBO SHIN , SATO YUKIO
IPC分类号： C04B5/06
摘要： PURPOSE: To effectively utilize a stainless steel slag for a roadway material or a civil land reclamation material without the danger of environmental pollution by completely preventing the elution of Cr ion from the stainless steel slag. CONSTITUTION: The S content in the slag is controlled to >=0.20wt.% by adding a bivalent sulfur compound into a molten chromium oxide-containing slag, which is reduction treated after stainless steel is decarbonized and refined, under stirring with blowing of inert gas.

43. 发明专利

JPH0610295B2 失效
公开(公告)号：JPH0610295B2
公开(公告)日：1994-02-09
申请号：JP20575186
申请日：1986-09-03
申请人： KAWASAKI STEEL CO
发明人： TAOKA KEIZO
IPC分类号： C21B11/00 , C21B13/00

44. 发明专利

JPH0353015A CONVERTER 失效
公开(公告)号：JPH0353015A
公开(公告)日：1991-03-07
申请号：JP18479889
申请日：1989-07-19
申请人： KAWASAKI STEEL CO
发明人： YAMADA SUMIO , TAOKA KEIZO
IPC分类号： C21C5/46
摘要： PURPOSE:To allow the tapping selection of a converter throat or tap hole and the stirring and refining of slag metal with a blowing gas by attachably and detachably disposing a gas blowing device consisting of a porous plug or metallic pipe, etc., to the tap hole in the side wall part of the converter. CONSTITUTION:The gas blowing device 4 is attachably and detachably disposed in the tap hole in the side wall part of the converter 8 for refining a carbon steel or alloy steel, such as stainless steel. This gas blowing device 4 is constituted of the porous plug or the single metallic pipe or plural pieces thereof, etc. The gas blowing device 4 of the above-mentioned converter 8 is attached and detached and the molten steel is tapped from the tap hole by tilting the converter 8 after the end of decarburization if the reduction refining is not executed after the decarburization refining of the carbon steel, etc. The gas blowing device 4 is fitted into the tap hole to close the tap hole before the start of the blowing if the reduction refining of the stainless steel, etc., is executed. The gas 7, such as Ar, N2, CO2 or CO is blown into slag 1 and the molten steel 2 from the gas blowing device 4 via a gas piping 6 while the molten steel is tapped from the throat 5 by tilting the converter 8, by which the stirring and reduction refining of the slag metal are executed.

45. 发明专利

JPH01215917A METHOD FOR MELTING STAINLESS STEEL 失效
公开(公告)号：JPH01215917A
公开(公告)日：1989-08-29
申请号：JP3971388
申请日：1988-02-24
申请人： KAWASAKI STEEL CO
发明人： KATO YOSHIHIDE , SAKURATANI TOSHIKAZU , FUJII TETSUYA , TAOKA KEIZO , YAMADA SUMIO , UMADA HAJIME
IPC分类号： C21C5/28
摘要： PURPOSE:To produce a stainless steel and also to reduce and recover Cr2O3 in molten slag with Fe-Si by charging molten iron into a combined blowing converter after pre-desiliconizing and dephosphorizing and dephosphorizing, adding Cr ore and carbonic material, separation molten slag after making molten Cr-contained iron and oxygen blowing with the other combined blowing converter to execute decarbonization. CONSTITUTION:The molten iron from a blast furnace is charged into a torpedo car 1 and powdery oxidizing agent containing Fe2O3 is blown from a lance 2 to oxidized- desulfurize and phosphorize it, so as to come to Si

46. 发明专利

JPS637312A SLAG DISCHARGING METHOD IN MELT REDUCTION REFINING BY CONVERTER 失效
公开(公告)号：JPS637312A
公开(公告)日：1988-01-13
申请号：JP14978486
申请日：1986-06-27
申请人： KAWASAKI STEEL CO
发明人： KONDO HIROSHI , TAOKA KEIZO
IPC分类号： C21C5/46 , C21B11/00
摘要： PURPOSE:To permit discharging of molten slag without decreasing the yield of tapping by positioning at least one of bottom blowing tuyeres to a slag layer and ejecting gas at the time of tilting a converter and discharging the slag. CONSTITUTION:The converter body 1 is tilted to the slag off side so that a molten steel layer 6 is positioned lower than the bottom blowing tuyeres 5, i.e., at least one of the tuyeres 5 is held immersed in the slag layer 4. The gas of a high flow rate is ejected from only the tuyere 5 positioned in the slag layer 4 in this state and the gas of a low flow rate is ejected from the other tuyeres 5. Only the slag is moved toward a converter throat part 2 by the thrust force of the gas jets to the slag layer 4 by which the slag is discharged. The outflow of the molten steel during the discharge of the molten slag is averted and the yield of tapping is improved by the above-mentioned method.

47. 发明专利

JPS6223043B2 失效
公开(公告)号：JPS6223043B2
公开(公告)日：1987-05-21
申请号：JP14977882
申请日：1982-08-28
申请人： KAWASAKI STEEL CO
发明人： HARA YOSHIAKI , NOZAKI TSUTOMU , OZAWA MICHIHARU , OOTANI HISAFUMI , TAOKA KEIZO
IPC分类号： C21C7/00 , C21C5/00 , C21C5/28

48. 发明专利

JP2001179302A MANUFACTURING METHOD OF SECTION STEEL 失效
公开(公告)号：JP2001179302A
公开(公告)日：2001-07-03
申请号：JP36454199
申请日：1999-12-22
申请人： KAWASAKI STEEL CO
发明人： MIURA YOSHINORI , OKUBO HIROYUKI , TAOKA KEIZO
IPC分类号： E02D5/04 , B21B1/08 , B21B1/082
摘要： PROBLEM TO BE SOLVED: To provide a manufacturing method of section steel which enables rolling section steel without accompanying worsening of precision of dimension or with baking of the section steel with thick joint which can comply with higher joint tensile strength requirement. SOLUTION: In a manufacturing method of section steel which owns the joint section on a web section end, including a pre process to form a projection 20A on the web end section through hot rolling and a bending process which forms a bent pawl 20 constituting a part of the joint section by bending the projection, the bending process is carried out by applying a lubricant, whose major constituent is a extreme-pressure additive, on the roll used in the bending or applying a lubricant whose co-efficient of friction is 0.15-0.25 based on the evaluation in the friction test which rubs the roll test piece with the section steel test piece at 500 deg.C and 4900 MPa.

49. 发明专利

JP2000212691A STEEL WIRE ROD FOR COLD FORGING AND ITS PRODUCTION 失效
公开(公告)号：JP2000212691A
公开(公告)日：2000-08-02
申请号：JP1176799
申请日：1999-01-20
申请人： KAWASAKI STEEL CO
发明人： HONGO HARU , FUJITA TOSHIO , KUSHIDA KOICHI , TAOKA KEIZO , TAKEDA SATORU , OGAWA TAKAO
IPC分类号： C21D8/06 , C22C38/00 , C22C38/18 , C22C38/54
摘要： PROBLEM TO BE SOLVED: To obtain an inexpensive steel wire rod capable of obviating wire drawing and excellent in dimensional precision by composing it of a specified compsn., controlling the surface roughness after scale removing treatment to the value equal to or below a specified one and controlling the tolerance of the wire diameter to a specified range. SOLUTION: This invention is a steel wire rod having a compsn. contg., by weight, 0.1 to =two kinds selected from

50. 发明专利

JP2553204B2 失效
公开(公告)号：JP2553204B2
公开(公告)日：1996-11-13
申请号：JP28866289
申请日：1989-11-08
申请人： KAWASAKI STEEL CO
发明人： TAOKA KEIZO , OOSUGI HITOSHI
IPC分类号： C21C5/34

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