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1. 发明专利

JP2000337334A HIGH STRUCTURE BOLT EXCELLENT IN DELAYED FRACTURE RESISTANCE 失效
公开(公告)号：JP2000337334A
公开(公告)日：2000-12-05
申请号：JP2000107025
申请日：2000-04-07
申请人： KOBE STEEL LTD , HONDA MOTOR CO LTD , SAGA TEKKOHSHO CO LTD
发明人： NAMIMURA YUICHI , IBARAKI NOBUHIKO , MAKII KOICHI , KAGUCHI HIROSHI
IPC分类号： F16B35/00 , B21J5/00 , B21K1/46 , C22C38/00 , C22C38/30
摘要： PROBLEM TO BE SOLVED: To provide a high strength bolt excellent in delayed fracture resistance which has a tensile strength of over 1200 N/mm2. SOLUTION: This bolt which is composed of a steel including C: 0.5-1.0% restrains the structure generation of one kind or more than one kind of pro- eutectoid ferrite, pro-eutectoid cementite, bentonite and martensite to make the area rate of pearlite structure with pearlite lamelar interval 200 nm or less to be 80% or above. Then, the high strength wire material which is made to have a tensile strength of over 1200 N/mm2 and excellent delayed fracture resistance by strong extension work is used. The material is cut to a fixed length and both end parts are threaded by thread rolling or cutting.

2. 发明专利

JP2000337332A HIGH STRENGTH BOLT EXCELLENT IN DELAYED FRACTURE RESISTANCE 失效
公开(公告)号：JP2000337332A
公开(公告)日：2000-12-05
申请号：JP2000107023
申请日：2000-04-07
申请人： KOBE STEEL LTD , HONDA MOTOR CO LTD , SAGA TEKKOHSHO CO LTD
发明人： NAMIMURA YUICHI , IBARAKI NOBUHIKO , MAKII KOICHI , KAGUCHI HIROSHI
IPC分类号： F16B35/00 , B21J5/00 , B21K1/46 , C22C38/00 , C22C38/54
摘要： PROBLEM TO BE SOLVED: To provide a high strength bolt excellent in delayed fracture resistance which has a tensile strength of over 1200 N/mm2. SOLUTION: This bolt which is composed of a steel including C: 0.5-1.0% restrains the structure generation of one kind or more than one kind of pro- eutectoid ferrite, pro-eutectoid cementite, bentonite and martensite to make the area of pearlite structure to be 80% or above. Then, the high strength wire material which is made to have a tensile strength of over 1200 N/mm2 and excellent delayed fracture resistance by strong extension work is used. The material is cut to a fixed length and both end parts are threaded by thread rolling or cutting. Otherwise, a bolt head is formed on one end part by warm forging, and the other end is threaded by thread rolling or cutting before or after the warm forging.

3. 发明专利

JP2001348618A METHOD FOR PRODUCING HIGH STRENGTH BOLT EXCELLENT IN DELAYED FRACTURE RESISTANCE AND RELAXATION RESISTANT CHARACTERISTIC 失效
公开(公告)号：JP2001348618A
公开(公告)日：2001-12-18
申请号：JP2001083281
申请日：2001-03-22
申请人： HONDA MOTOR CO LTD , SAGA TEKKOHSHO CO LTD , KOBE STEEL LTD
发明人： KOIKE SEIICHI , TAKASHIMA MITSUO , TSUKIYAMA KATSUHIRO , NAMIMURA YUICHI , IBARAKI NOBUHIKO
IPC分类号： F16B31/02 , C21D1/26 , C21D8/06 , C21D9/00 , C22C38/00 , C22C38/04 , C22C38/06 , C22C38/30 , F16B35/00
摘要： PROBLEM TO BE SOLVED: To provide a useful method for producing a high strength bolt excellent in both of a delayed fracture resistance and a relaxation resistant characteristic, although this bolt has such high strength level as >=1,200 N/mm2 tensile strength. SOLUTION: A steel material for bolt contains 0.50-1.0% C, =1,200 N/mm2 tensile strength, and also, excellent delayed fracture resistance and relaxation resistant characteristic.

4. 发明专利

JP2000337333A HIGH STRENGTH BOLT EXCELLENT IN DELAYED FRACTURE RESISTANCE 失效
公开(公告)号：JP2000337333A
公开(公告)日：2000-12-05
申请号：JP2000107024
申请日：2000-04-07
申请人： KOBE STEEL LTD , HONDA MOTOR CO LTD , SAGA TEKKOHSHO CO LTD
发明人： NAMIMURA YUICHI , IBARAKI NOBUHIKO , MAKII KOICHI , KAGUCHI HIROSHI
IPC分类号： F16B35/00 , B21H3/02 , C22C38/00 , C22C38/34
摘要： PROBLEM TO BE SOLVED: To provide a high strength bolt excellent in delayed fracture resistance which has a tensile strength of over 1200 N/mm2. SOLUTION: This bolt which is composed of a steel including C: 0.5-1.0% restrains the structure generation of one kind or more than one kind of pro- eutectoid ferrite, pro-eutectoid cementite, bentonite and martensite. The area rate of pearlite structure with particle No.7 or above in pearlite nodule size is made to be 80% or above. Then, the high strength wire material which is made to have a tensile strength of over 1200 N/mm2 and excellent delayed fracture resistance by strong extension work is used. The material is cut to a fixed length and both end parts are threaded by thread rolling or cutting.

5. 发明专利

JP2005281860A High strength bolt excellent in characteristics of resistance to delayed fracture and resistance to relaxation 有权
$High strength bolt excellent in characteristics of resistance to delayed fracture and resistance to relaxation$
标题翻译：高强度螺栓具有延展断裂和抵抗松弛的特性
公开(公告)号：JP2005281860A
公开(公告)日：2005-10-13
申请号：JP2005055743
申请日：2005-03-01
申请人： Honda Motor Co Ltd , Kobe Steel Ltd , Saga Tekkohsho Co Ltd , 本田技研工業株式会社 , 株式会社佐賀鉄工所 , 株式会社神戸製鋼所
发明人： TAKASHIMA MITSUO , TAKADA KENTARO , IIDA ZENJI , TSUKIYAMA KATSUHIRO , EGAWA TAKEHIKO , NAMIMURA YUICHI , IBARAKI NOBUHIKO
IPC分类号： B21J5/00 , B21K1/44 , C21D8/06 , C21D9/00 , C22C38/00 , C22C38/06 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To additionally improve the resistance to relaxation of a high strength bolt of a pearlite structure having a tensile strength of ≥1,200 N/mm
2 and being excellent in characteristics of the resistance to delayed fracture.
SOLUTION: The high strength bolt having the tensile strength of ≥1,200 N/mm
2 and being excellent in the characteristics of the resistance to the delayed fracture and the resistance to the relaxation is produced by subjecting a steel for a bolt containing 0.5 to 1.0% C (by mass %, hereinafter the same), 0.55 to 3% Si, 0.2 to 2% Mn, ≤0.03 % (not containing 0%) P, ≤0.03 % (not containing 0%) S, and ≤0.3 % (not containing 0%) Al, and having a structure wherein the total area proportion of pro-eutectoid ferrite, pro-eutectoid cementite, bainite and martensite is
摘要翻译：要解决的问题：为了进一步提高拉伸强度≥1,200N/ mm 2 的珠光体组织的高强度螺栓的松弛性，并且电阻特性优异延迟骨折。解决方案：拉伸强度≥1,200N/ mm 2 的高强度螺栓具有优异的耐延迟断裂特性和耐松弛性，是通过含有0.5〜1.0％C（质量％以下相同）的螺栓用钢，0.55〜3％的Si，0.2〜2％的Mn，≤0.03％（不含0％）P，≤0.03％（不含 0％）S，≤0.3％（不含0％）Al，并且具有其中先共析铁素体，先共析渗碳体，贝氏体和马氏体的总面积比例<20％，余量为珠光体的结构，拉丝拉丝，将拉丝产品冷镦并挤压，形成具有螺栓形状的制品，然后在100〜500℃的温度范围内使制品上蓝。版权所有（C）2006，JPO＆NCIPI

6. 发明专利

JP2005344199A Steel material to be cold-bent 有权
标题翻译：钢材要冷弯
公开(公告)号：JP2005344199A
公开(公告)日：2005-12-15
申请号：JP2004168149
申请日：2004-06-07
申请人： Kobe Steel Ltd , 株式会社神戸製鋼所
发明人： SUDA SUMIE , IBARAKI NOBUHIKO
IPC分类号： C22C38/00 , C22C38/50
摘要： PROBLEM TO BE SOLVED: To establish a technology which prevents a steel material from being deformed after low-temperature heat treatment, by controlling a factor other than a casting method. SOLUTION: The steel material to be cold-bent which is prevented from causing deformation after low-temperature heat treatment includes 0.35-0.85% C, 3% or less (excluding 0%) Si, 0.1-1% Mn, 1% or less (including 0%) Ni, and further at least one element selected from among Cr, Mo, V, Ti, Nb and W in such a range as to satisfy the following formula (1): [Cr]/3+[Mo]/2+2×[V]+[Ti]+[Nb]+[W]/2≥0.45, wherein [Cr], [Mo], [V], [Ti], [Nb] and [W] represent each elemental content (mass%) in the steel material. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：通过控制铸造方法以外的因素，建立防止钢材在低温热处理后变形的技术。解决方案：在低温热处理后防止发生变形的被冷弯钢材含有0.35-0.85％C，3％以下（不包括0％）Si，0.1-1％Mn，1 ％以下（包括0％）的Ni，还有选自Cr，Mo，V，Ti，Nb和W中的至少一种元素的范围满足下式（1）：[Cr] / 3 + [Mo] / 2 + 2×[V] + [Ti] + [Nb] + [W]/2≥0.45，其中[Cr]，[Mo]，[V]，[Ti]，[Nb] W]表示钢材中的各元素含量（质量％）。版权所有（C）2006，JPO＆NCIPI

7. 发明专利

JP2004076086A High-strength steel component superior in delayed fracture resistance, and manufacturing method therefor 有权
$High-strength steel component superior in delayed fracture resistance, and manufacturing method therefor$
公开(公告)号：JP2004076086A
公开(公告)日：2004-03-11
申请号：JP2002237089
申请日：2002-08-15
申请人： Kobe Steel Ltd , 株式会社神戸製鋼所
发明人： NAMIMURA YUICHI , IBARAKI NOBUHIKO
IPC分类号： C21D6/00 , C21D1/18 , C22C38/00 , C22C38/14 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a component of a high-strength steel which surely improves delayed fracture characteristic, despite having a wide range of a composition.
SOLUTION: The component of a high-strength steel superior in delayed fracture resistance includes 0.20-0.55% C (hereinafter by mass%), 0.01-0.10% Ti and 0.02% or less N, wherein grain sizes of austenitic crystals are No.7 or higher, a content of fine TiC having particle diameters of 0.1 μm or less is 0.01% or more, and the content of the above fine TiC (mass%; [fine TiC]) and the content of all Ti (mass%; [Ti]) satisfies the expression (1): [fine TiC]/[Ti] ≥ 0.4 (1).
COPYRIGHT: (C)2004,JPO

8. 发明专利

JP2003193183A HIGH-STRENGTH STEEL WIRE WITH EXCELLENT DELAYED FRACTURE RESISTANCE AND CORROSION RESISTANCE 审中-公开
公开(公告)号：JP2003193183A
公开(公告)日：2003-07-09
申请号：JP2001400950
申请日：2001-12-28
申请人： KOBE STEEL LTD
发明人： NAMIMURA YUICHI , IBARAKI NOBUHIKO
IPC分类号： C22C38/00 , C22C38/16 , C22C38/54
摘要： PROBLEM TO BE SOLVED: To provide high-strength steel wire with ≥1,200 N/mm 2 tensile strength combining excellent delayed fracture resistance and corrosion resistance. SOLUTION: The high-strength steel wire is composed of steel which contains 0.5 to 1.0% C and also contains one or more elements selected from the group consisting of Cu, Ni and Ti in the amounts satisfying inequality 3.1≥3[Cu]+[Ni]+6[Ti]≥0.1(%) (wherein, [Cu], [Ni] and [Ti] represent respective contents of Cu, Ni and Ti). In this steel wire, the area ratio of pearlitic structure is ≥80% and a strength of ≥1,200 N/mm 2 is produced. COPYRIGHT: (C)2003,JPO

9. 发明专利

JP2002180200A STEEL WIRE ROD FOR HARD-DRAWN SPRING, WIRE DRAWING ROD FOR HARD-DRAWN SPRING, HARD-DRAWN SPRING AND METHOD FOR PRODUCING THE HARD-DRAWN SPRING 失效
公开(公告)号：JP2002180200A
公开(公告)日：2002-06-26
申请号：JP2000387640
申请日：2000-12-20
申请人： KOBE STEEL LTD , NHK SPRING CO LTD , SHINKO WIRE CO LTD
发明人： IBARAKI NOBUHIKO , INADA ATSUSHI , SUDA SUMIE , TAKAMURA NORITOSHI , TENDO SATORU , FUJIWARA TADAYOSHI , JINBO TETSUO
IPC分类号： F16F1/02 , C21D7/02 , C21D7/06 , C21D9/02 , C22C38/00 , C22C38/46
摘要： PROBLEM TO BE SOLVED: To provide a steel wire rod and a wire drawing rod for a spring for producing a hard-drawn spring which exhibits excellent fatigue strength and permanent set resistance in fatigue equal to those of a spring using an oil tempered steel wire, the hard-drawn spring, a useful method for producing the hard-drawn spring at a low cost and the like. SOLUTION: The steel wire rod for a hard-drawn spring has a composition containing, by mass, 0.5 to =55×[C]+61...(1); wherein, [C] denotes the content (mass%) of C.

10. 发明专利

JP2002061085A WIRE ROPE HAVING EXCELLENT WEAR RESISTANCE AND FATIGUE CHARACTERISTICS, STEEL WIRE AND STEEL MATERIAL 失效
公开(公告)号：JP2002061085A
公开(公告)日：2002-02-28
申请号：JP2000243083
申请日：2000-08-10
申请人： KOBE STEEL LTD
发明人： SUDA SUMIE , INADA ATSUSHI , IBARAKI NOBUHIKO
IPC分类号： D07B1/06 , B66B7/06 , C22C38/00 , C22C38/04 , C22C38/54
摘要： PROBLEM TO BE SOLVED: To provide a wire rope which can reduce wear caused by abrasions between steel wires or between a steel wire and a surface of sheaves, and has an improved bending fatigue strength, excellent wear resistance and fatigue resistance, to provide the steel wire for the wire rope, and to provide a steel material used for producing the steel wire. SOLUTION: This steel wire characterized by satisfying 0.30 to 1.2 wt.% of C,

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