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1. 发明专利

CA2548560C STEEL FOR STRUCTURAL PART OF AUTOMOBILE AND METHOD FOR PRODUCING THE SAME 未知
公开(公告)号：CA2548560C
公开(公告)日：2012-06-26
申请号：CA2548560
申请日：2004-12-09
申请人： JFE STEEL CORP , TOYOTA MOTOR CO LTD
发明人： TOYODA SHUNSUKE , SAKATA KEI , SATO AKIO , KANEKO KOUICHI , KAWAGUCHI HIROSHI
IPC分类号： C21D9/46 , C22C38/00 , C21D8/02 , C21D8/10 , C22C38/58
摘要： The present invention provides a steel having excellent formability, fatigue endurance after quenching, low temperature toughness, resistance for hydrogen embrittlement, and corrosion fatigue endurance. Resolving means includes heating a steel slab at 1160°C to 1320°C, hot-finish-rolling the steel slab at a finisher delivery temperature of 750°C to 980°C, and then coiling the hot-rolled steel at a coiling temperature of 560°C to 740°C after slow cooling for a time of 2 seconds or more to produce a hot-rolled steel strip having a structure in which the ferrite grain diameter df corresponding to a circle is 1.1 m, to less than 1.2 µm and the ferrite volume fraction Vf is 30% to 98%, the steel slab containing 0.18 to 0.29% of C, 0.06 to 0.45% of Si, 0.91 to 1.85% of Mn, 0.019% or less of P, 0.0029% or less of S, 0.015 to 0.075% of sol. Al, 0.0049% or less of N, 0.0049% or less of 0, 0.0001 to 0.0029% of B, 0.001 to 0.019% of Nb, 0.001 to 0.029% of Ti, 0.001 to 0.195% of Cr, and 0.001 to 0.195% of Mo so that the carbon equivalent Ceq satisfies a value of 0.4 to less than 0.58, and the total x of multiplying factors including that for B according to Grossmann satisfies a value of 1.2 to less than 1.7. The hot-rolled steel strip is used as a raw material for producing a steel tube by electric resistance welded tube making with a width reduction of hoop of 8% or less.

2. 发明专利

CA2548560A1 STEEL PRODUCT FOR STRUCTURAL MEMBER OF AUTOMOBILE AND METHODFOR PRODUCTION THEREOF 未知
公开(公告)号：CA2548560A1
公开(公告)日：2005-06-23
申请号：CA2548560
申请日：2004-12-09
申请人： TOYOTA MOTOR CO LTD , JFE STEEL CORP
发明人： TOYODA SHUNSUKE , SAKATA KEI , SATO AKIO , KANEKO KOUICHI , KAWAGUCHI HIROSHI
IPC分类号： C21D9/46 , C22C38/00 , C21D8/02 , C21D8/10 , C22C38/58
摘要： A method for producing a steel product which comprises providing a steel sla b having a chemical composition satisfying C: 0.18 to 0.29 %, Si: 0.06 to 0.45 %, Mn: 0.91 to 1.85 %, P: 0.019 % or less, S: 0.0029% or less, sol.Al: 0.015 to 0.075%, N: 0.0049 % or less, O: 0.0049 % or less, B: 0.0001 to 0.0029 %, Nb: 0.001 to 0.019 %, Ti: 0.001 to 0.029 %, Cr: 0.001 to 0.195 %, Mo: 0.001 to 0.195 %, and 0.4 or more and less than 0.58 of Ceq, and satisfying that the sum (.chi.) of hardenability multiples according to Grossmann being aware of B is 1.2 or more and less than 1.7, heating the steel slab to 1160 to 1320~C, subjecting the resultant slab to a hot finish rolling having an ending temperature for the finish rolling of 750 to 980~C, annealing the rolled product for a period of 2s or more before winding, and then winding the product up at a temperature of 560 to 740~C, to thereby produce a hot-rolled steel belt which has a structure having an average grain diameter (df) corresponding to a ferrite circle of 1.1 .mu.m or more and less than 12 .mu. m and a ferrite volume percentage (Vf) of 30 to 98 %. A steel pipe is produced by a method comprising using the above hot-rolled steel belt as a material a nd subjecting it to an electric welding wherein a reduction ratio for width is 8 % or less. A steel product produced by the above method is excellent in formability, fatigue strength after hardening, toughness at a low temperatur e, characteristics of resistance to delayed break and corrosion fatigue strengt h.

3. 发明公开

EP1693476A4 STEEL PRODUCT FOR STRUCTURAL MEMBER OF AUTOMOBILE AND METHOD FOR PRODUCTION THEREOF 有权
标题翻译：钢铁产品用于生产汽车部件及其过程
公开(公告)号：EP1693476A4
公开(公告)日：2009-07-22
申请号：EP04807135
申请日：2004-12-09
申请人： JFE STEEL CORP , TOYOTA MOTOR CO LTD
发明人： TOYODA SHUNSUKE , SAKATA KEI , SATO AKIO , KANEKO KOUICHI , KAWAGUCHI HIROSHI
IPC分类号： C21D9/46 , C22C38/00 , C21D8/02 , C21D8/10 , C22C38/58
CPC分类号： C22C38/02 , C21D8/0226 , C21D8/10 , C22C38/001 , C22C38/002 , C22C38/04 , C22C38/22 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/38
摘要： A method for producing a steel product which comprises providing a steel slab having a chemical composition satisfying C: 0.18 to 0.29 %, Si: 0.06 to 0.45 %, Mn: 0.91 to 1.85 %, P: 0.019 % or less, S: 0.0029% or less, sol.Al: 0.015 to 0.075%, N: 0.0049 % or less, O: 0.0049 % or less, B: 0.0001 to 0.0029 %, Nb: 0.001 to 0.019 %, Ti: 0.001 to 0.029 %, Cr: 0.001 to 0.195 %, Mo: 0.001 to 0.195 %, and 0.4 or more and less than 0.58 of Ceq, and satisfying that the sum (χ) of hardenability multiples according to Grossmann being aware of B is 1.2 or more and less than 1.7, heating the steel slab to 1160 to 1320˚C, subjecting the resultant slab to a hot finish rolling having an ending temperature for the finish rolling of 750 to 980˚C, annealing the rolled product for a period of 2s or more before winding, and then winding the product up at a temperature of 560 to 740˚C, to thereby produce a hot-rolled steel belt which has a structure having an average grain diameter (df) corresponding to a ferrite circle of 1.1 μm or more and less than 12 μm and a ferrite volume percentage (Vf) of 30 to 98 %. A steel pipe is produced by a method comprising using the above hot-rolled steel belt as a material and subjecting it to an electric welding wherein a reduction ratio for width is 8 % or less. A steel product produced by the above method is excellent in formability, fatigue strength after hardening, toughness at a low temperature, characteristics of resistance to delayed break and corrosion fatigue strength.

4. 发明专利

JPS60108181A WELDING METHOD OF SMALL PARTS WITH SANDWICH TYPE VIBRATION-DAMPING STEEL PLATE 失效
公开(公告)号：JPS60108181A
公开(公告)日：1985-06-13
申请号：JP21853983
申请日：1983-11-18
申请人： TOYOTA MOTOR CO LTD
发明人： KANEKO KOUICHI , TODA MUNECHIKA
IPC分类号： B23K11/14
摘要： PURPOSE:To join surely small parts with stable strength by subjecting both steel plates of a titled vibration-damping steel plate to a spot welding in the position facing the weld position prior to projection welding of the small parts onto said steel plate. CONSTITUTION:Welding chips 4 are pressed respectively to the upper and lower steel plates 3a, 3b of a vibration-damping steel plate 3 and a bypass 5 is provided between both steel plates then both steel plates are spot-welded in the stage of welding, for example, a seat plug 2 to the upper side of the plate 3. The welding is accomplished at plural points in the optional positions in the circumferential direction of the plate 3 to form nuggets 6. The plug 2 is then placed on the plate 3a in such a way that the lower projections thereof face the nuggets 6 and the plug 2 is projection-welded to the plate 3a in the position facing the points where the nuggets 6 are provided. Weld zones 7 are thus formed.

5. 发明专利

JPS58133397A SINGLE-SURFACE COMPOSITION-COATD STEEL PLATE 失效
公开(公告)号：JPS58133397A
公开(公告)日：1983-08-09
申请号：JP1407982
申请日：1982-01-29
申请人： TOYOTA MOTOR CO LTD
发明人： KANEKO KOUICHI , FUKADA ARATA , NODA MASAKI , TODA MUNECHIKA
IPC分类号： C25D5/26 , B32B15/08 , C25D7/06
摘要： PURPOSE:To contemplate the improvement of sound isolation and lightweight by bonding a mild steel plate and a coated steel plate with a resin layer into three-layered structure. CONSTITUTION:The titled steel plate comprising the three-layered structure of a mild steel plate 1, a coated steel plate 2, e.g. prepared by coating a mild steel plate with zinc or tin, and a resin layer 3 (e.g. polyethylene or ADS resin) interposed therebetween. This composite steel plate is improved in sound isolation, since vibration transmitting through the steel plate is absorbed by the resin layer 3. In addition, its specific gravity as a whole is made small because of the presence of the resin layer 3 having small specific gravity.

6. 发明专利

JPS6082656A MANUFACTURE OF VIBRATION PROOF GEAR 失效
公开(公告)号：JPS6082656A
公开(公告)日：1985-05-10
申请号：JP19042783
申请日：1983-10-12
申请人： TOYOTA MOTOR CO LTD
发明人： KANEKO KOUICHI
IPC分类号： C23C8/04
摘要： PURPOSE:To manufacture a vibration proof gear generating less sound of vibration by forming the gear of ferromagnetic vibration proof steel, coating an anticarburizing agent on the boss part of the gear, and carburizing and hardening the gear. CONSTITUTION:The gear is finished by providing a finishing allowance deeper than the carburation depth to the boss part of the gear in working and finishing ferromagnetic vibration proof steel into the form of a gear. An anticarburizing agent is coated on the boss part of the gear, and the gear is carburized and hardened at 850-950 deg.C. Then the carburized layer formed on the boss part is removed by cutting, grinding, etc., and a carburized and hardened layer 2 having 0.1-2mm. (t) thickness is formed only on the tooth part 1. The strength and abrasion resistance of the tooth part 1 are increased with the carburized and hardened layer 2. Since the boss part is not carburized and hardened, the vibration due to the biting of the gear can be damped by the vibration proof characteristic of the material. The vibration proof gear with less noise due to the operation of the gear and less abrasion of the tooth part can be manufactured.

7. 发明专利

JPS6078747A MANUFACTURE OF SANDWICH METALLIC BAND 失效
公开(公告)号：JPS6078747A
公开(公告)日：1985-05-04
申请号：JP18813183
申请日：1983-10-06
申请人： TOYOTA MOTOR CO LTD
发明人： TODA MUNECHIKA , KANEKO KOUICHI
IPC分类号： B32B37/00 , B23K11/06 , B32B15/08

8. 发明专利

JPS6058844A MANUFACTURE OF SANDWICH METALLIC BAND 失效
公开(公告)号：JPS6058844A
公开(公告)日：1985-04-05
申请号：JP16724883
申请日：1983-09-09
申请人： TOYOTA MOTOR CO LTD
发明人： TODA MUNECHIKA , KANEKO KOUICHI
IPC分类号： B32B15/088 , B32B15/08

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