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1. 发明专利

JPH0377034B2 失效
公开(公告)号：JPH0377034B2
公开(公告)日：1991-12-09
申请号：JP507886
申请日：1986-01-16
申请人： KAWASAKI STEEL CO
发明人： NAKATSUJI KATSUAKI , MATSUMOTO TAKEO , KAWABUCHI MASANOBU , YUASA MITSUYUKI
IPC分类号： B23K35/30 , C22C38/00 , C22C38/14

2. 发明专利

JP2002294346A METHOD FOR PRODUCING STEEL WIRE ROD HAVING EXCELLENT COLD WORKABILITY 失效
公开(公告)号：JP2002294346A
公开(公告)日：2002-10-09
申请号：JP2001095936
申请日：2001-03-29
申请人： KAWASAKI STEEL CO
发明人： FUJITA TOSHIO , KAWABUCHI MASANOBU , TAOKA KEIZO
IPC分类号： C21D1/26 , C21D9/52 , C22C38/00 , C22C38/18 , C22C38/44
摘要： PROBLEM TO BE SOLVED: To provide a method for producing a steel wire rod having excellent cold workability by which the production cost in the production process for a wire rod can be reduced, and further, the production cost in the production process for a steel ball or the like can be reduced. SOLUTION: A wire rod produced by subjecting a slab having a composition containing, by mass, 0.6 to 1.2% C, 0.1 to 0.5% Si, 0.2 to 0.6% Mn and 1.0 to 2.0% Cr, and the balance Fe with inevitable impurities to hot rolling is coiled in the temperature range of 700 to 850 deg.C. The wire rod is next subjected to spheroidizing annealing, and, after that, strain is applied thereto within a range where the strain amount ε=100×d/(D+d) satisfies 2.5 to 15.0 by using a modification roller. Further, pickling and surface treatment are performed thereto; wherein, D is the diameter (mm) of the modification roller, and (d) is the diameter of the wire rod ×1/2 (mm).

3. 发明专利

JPS62130757A CONTINUOUS CASTING METHOD 失效
公开(公告)号：JPS62130757A
公开(公告)日：1987-06-13
申请号：JP27179385
申请日：1985-12-02
申请人： KAWASAKI STEEL CO
发明人： MATSUKAWA TOSHITANE , KAWABUCHI MASANOBU
IPC分类号： B22D11/124 , B22D11/128
摘要： PURPOSE:To prevent the cracking at the solidification boundary and to permit high speed casting by using hourglass-shaped rolls for upper pinch rolls at the leveling point of a curved type continuous casting machine and cooling rolls on the inner side of the arc more strongly than the rolls on the outer side thereby casting an ingot. CONSTITUTION:The rolls of the hourglass shape as a whole which are recessed in the surface so as to be made smaller in the diameter in the central part than the diameter of both side parts are used for the pinch rolls 5 positioned on the inner side of the arc of the ingot. The pinch rolls 5 have the hourglass shape and therefore, the bulging part generated in the non-supporting zone of the ingot is given drawing power as both right and left sides of the ingot are rolled down but the central part is not rolled down. The rolling down strain is thus made zero or suppressed to the small value approximate to zero. The leveling strain is further decreased by making combination use of the differential cooling on the top and bottom surfaces therewith, by which the total strain is decreased and the casting speed is increased.

4. 发明专利

JPS6261764A CONTINUOUS CASTING METHOD WITH LESS CENTRAL SEGREGATION 失效
公开(公告)号：JPS6261764A
公开(公告)日：1987-03-18
申请号：JP20138385
申请日：1985-09-11
申请人： KAWASAKI STEEL CO
发明人： KINOSHITA KATSUO , SHINJO YUTAKA , YAMAZAKI HISAO , OGUCHI MASAO , KAWABUCHI MASANOBU
IPC分类号： B22D11/124
摘要： PURPOSE:To improve quality by providing a forced cooler consisting of sprays, etc. from the prescribed position in the casting direction of a residual molten metal pool up to the foremost end and allowing the solidified shell of an ingot to shrink. CONSTITUTION:The forced cooler consisting of spray nozzles 5 is disposed from the position of 2-15m before the foremost end of the molten steel pool 2 in a crater up to the foremost end position along the casting direction. The ingot surface is forcibly cooled by the plural spray nozzles 5 so that the compressive stress necessary for the solidified shell 1 is obtd. in the stage when the solidified shell 1 of the ingot is formed. More specifically, the shrinkage strain generated on solidification of the liquid core of the residual molten steel is compensated and the movement of the solute-thickened molten steel along the V-segregation line is prevented. Since the central segregation of the product is thereby reduced, the quality such as low-temp. toughness and fatigue life of the product is improved.

5. 发明专利

JPS62166092A SOLID WIRE FOR CO2 OR AR-CO2 WELDING 失效
公开(公告)号：JPS62166092A
公开(公告)日：1987-07-22
申请号：JP507886
申请日：1986-01-16
申请人： KAWASAKI STEEL CO
发明人： NAKATSUJI KATSUAKI , MATSUMOTO TAKEO , KAWABUCHI MASANOBU , YUASA MITSUYUKI
IPC分类号： B23K35/30 , C22C38/00 , C22C38/14
摘要： PURPOSE:To improve the weldability of a wire for CO2 or Ar-CO2 welding to be produced by continuously casting a stock contg. specific ratios of C, Si, Mn, P, Al, Ti, O, N and further a specific ratio of Ca consisting of the balance Fe. CONSTITUTION:The compsn. of the wire contains

6. 发明专利

JPS6261766A CONTINUOUS CASTING METHOD WITH LESS CENTRAL SEGREGATION 失效
公开(公告)号：JPS6261766A
公开(公告)日：1987-03-18
申请号：JP20138485
申请日：1985-09-11
申请人： KAWASAKI STEEL CO
发明人： KINOSHITA KATSUO , SHINJO YUTAKA , YAMAZAKI HISAO , OGUCHI MASAO , KAWABUCHI MASANOBU
IPC分类号： B22D11/128 , B22D11/12
摘要： PURPOSE:To improve quality by successively rolling down an ingot to decrease the section of the ingot by the amt. corresponding to the volume shrinkage based on the shrinkage on solidification from the prescribed position in the casting direction of a residual molten metal pool up to the foremost end, then executing casting. CONSTITUTION:Anvil groups 5 are disposed above and below a roller table 4 from the position of 2-15mm before the foremost end in the casting direction of the molten metal pool 2 up to the foremost end of the pool 2. The anvils 5 are connected to a hydraulic compressing system and is moved back and forth like walking beams; at the same time, the anvils exert the compression of the prescribed amt. per unit length to the solidified shell 1. The ingot is thereby successively rolled down by as much as the amt. corresponding to the volume shrinkage based on the solidification of the liquid core of the ingot. The central segregation of a slab or bloom is thus decreased and the quality is improved.

7. 发明专利

JP2003147487A STEEL FOR FORCED COLD WORKING AND PRODUCTION METHOD THEREFOR 审中-公开
公开(公告)号：JP2003147487A
公开(公告)日：2003-05-21
申请号：JP2001340264
申请日：2001-11-06
申请人： KAWASAKI STEEL CO
发明人： MATSUZAKI AKIHIRO , OMORI YASUHIRO , KAWABUCHI MASANOBU , HAGIWARA HIROSHI
IPC分类号： C21D8/06 , C22C38/00 , C22C38/06
摘要： PROBLEM TO BE SOLVED: To provide steel for forced cold working, which has excellent cold workability on forced cold working at a working ratio of >=80% without performing process annealing. SOLUTION: A steel stock having a composition containing =50% in the temperature range of 800 deg.C to an Ar1 transformation point. After the hot working, air cooling is performed thereto, so that the steel having a structure consisting of a ferritic phase having a mean ferritic grain diameter of

8. 发明专利

JPH06184696A STEEL WIRE FOR HIGH STRENGTH SPRING EXCELLENT IN SETTLING RESISTANCE AND ITS PRODUCTION 失效
公开(公告)号：JPH06184696A
公开(公告)日：1994-07-05
申请号：JP34059892
申请日：1992-12-21
申请人： KAWATETSU TECHNO WIRE KK , KAWASAKI STEEL CO
发明人： KASHIWA FUMIAKI , AIDA JIYUNICHI , KAWABUCHI MASANOBU
IPC分类号： C21D8/06 , C22C38/00 , C22C38/06 , C23C30/00
摘要： PURPOSE:To produce a steel wire for high strength spring having high settling resistance by applying wiredrawing to a continuously squeezed material having a specific composition and a low central segregation ratio while increasing a cold draft. CONSTITUTION:The steel has a composition consisting of, by weight, 0.75-0.95% C, 0.12-0.32% Si, 0.30-0.90% Mn,

9. 发明专利

JPH03199309A PRODUCTION OF STEEL PRODUCTS HAVING EXCELLENT QUENCHING CRACK RESISTANCE 失效
公开(公告)号：JPH03199309A
公开(公告)日：1991-08-30
申请号：JP33869889
申请日：1989-12-28
申请人： KAWASAKI STEEL CO
发明人： KAWABUCHI MASANOBU , YAMAMOTO YOSHIHARU , AMANO KENICHI
IPC分类号： B22D11/12 , C21D8/00 , C22C38/00 , C22C38/04
摘要： PURPOSE:To produce the steel products having excellent quenching crack resistance by forging and hot rolling a steel ingot near the crater end thereof in such a manner that the ratio of the content of C in the axial central part of the ingot with respect to the content of C in the molten steel in a ladle attains a specific value at the time of continuous casting of a molten steel having a specific compsn. CONSTITUTION:The steel ingot obtd. by continuous casting of the molten steel having the compsn. contg., by weight %, 0.20 to 1.1% C, 0.1 to 1.0% Si, 0.3 to 2.0% Mn, 0.005 to 0.050% P, 0. 005 to 0.050% S, and 0.1 to 3.0% in total Cr, Mo and Ni and exists in the ladle is forged near the crater end where the unsolidified molten steel in the ingot completes solidification in such a manner that the value of the ratio C/C0 of the carbon content C in the axial central part of the ingot with respect to the carbon content C0 of the molten steel in the ladle attains 0.8 to 1.1 to form a bloom. The bloom is in succession hot rolled. The steel products which has the excellent quenching rack resistance and is suitable for blank materials for high tensile bolts, etc., are thus produced without restraining the P and S of impurities to

10. 发明专利

JPS62240145A METHOD FOR CHANGING CASTING BILLET SECTION UNDER CASTING IN HORIZONTAL CONTINUOUS CASTING 失效
公开(公告)号：JPS62240145A
公开(公告)日：1987-10-20
申请号：JP8571986
申请日：1986-04-14
申请人： KAWASAKI STEEL CO
发明人： FUJIYAMA TOSHIRO , KAWABUCHI MASANOBU , KUROSE YOSHIKAZU
IPC分类号： B22D11/04 , B22D11/045 , B22D11/05
摘要： PURPOSE:To improve the productivity of horizontal continuous casting by chang ing casting billet section while sliding a lower wall and side walls based on an upper wall of mold, during casting. CONSTITUTION:A back-plate 16C is gone back by the front and rear driving device 18C, and at the same time, a back-plate 16B is shifted toward left side by the side driving device 20B. After reaching to the prescribed dimension for width, in succession, the back-plates 16B, 16D are shifted, that is, the back- plate 16B is descended by the front and rear driving device 18B and at the same time, the back-plate 16D is descended by the side driving device 20D, and at the time of reaching to the prescribed dimension for the thickness of the casting billet, the changing of the casting billet section is finished, and the section of the casting billet is enlarged.

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