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21. 发明专利

JP2011200885A Method for rolling steel bar 审中-公开
标题翻译：滚钢棒方法
公开(公告)号：JP2011200885A
公开(公告)日：2011-10-13
申请号：JP2010068670
申请日：2010-03-24
申请人： Jfe Steel Corp , Jfeスチール株式会社
发明人： HINO YOSHIMICHI , HASE KAZUKUNI , KIMURA HIDETO
IPC分类号： B21B1/16 , B21B43/04
摘要： PROBLEM TO BE SOLVED: To enable the rolling of a plurality of steel bars without deteriorating rolling efficiency regardless of the presence or absence of cooling treatment.SOLUTION: When manufacturing the steel bar by performing the rough rolling of a bloom subjected to continuous casting and then performing finish rolling, a retreating line for retreating a base stock for rolling from the conveying line, is provided on the conveying line for conveying the base stock delivered from a roughing mill to a finishing mill, and as for the base stock for rolling, which requires cooling before the finish rolling, the base stock for rolling is transferred once from the conveying line to the retreating line and necessary cooling is performed on this retreating line. After the base stock for rolling is cooled down to a desired temperature, it is made to return to the conveying line and conveyed to the finishing mill. On the other hand, as for the base stock for rolling which does not require the cooling before the finish rolling, it is made to passing through the conveying line as it is and guided to the finishing mill.
摘要翻译：要解决的问题：无论是否存在冷却处理，都可以轧制多个钢筋而不降低轧制效率。解决方案：通过进行连续铸造的坯料的粗轧然后再制造钢棒在输送线上设置用于将从粗轧机输送的基础原料输送到精轧机的轧制用基材的轧制用基材的退火线，以及轧制用基材，在精轧之前需要冷却，轧制用原料从输送线路一次转移到后退线，对该回退线进行必要的冷却。将轧制用基材冷却至所需温度后，返回到输送线并输送到精轧机。另一方面，对于在精轧之前不需要冷却的轧制用原料，使其直接通过输送线并被引导至精轧机。

22. 发明专利

JP2011122208A Nitrocarburized gear 有权
标题翻译： NITROCARBURIZAR GEAR
公开(公告)号：JP2011122208A
公开(公告)日：2011-06-23
申请号：JP2009281165
申请日：2009-12-11
申请人： Jfe Bars & Shapes Corp , Jfe Steel Corp , Jfeスチール株式会社 , Jfe条鋼株式会社
发明人： OMORI YASUHIRO , FUKUOKA KAZUAKI , TOMITA KUNIKAZU , HASE KAZUKUNI
IPC分类号： C22C38/00 , C21D1/06 , C21D8/06 , C21D9/32 , C22C38/14 , C22C38/60 , C23C8/32
摘要： PROBLEM TO BE SOLVED: To provide a nitrocarburized gear which is superior in productivity and fatigue characteristics, and is preferable for an automobile and a construction machine. SOLUTION: The nitrocarburized gear comprises, by mass%, 0.15% or less C, 0.5% or less Si, 2.5% or less Mn, 0.03-0.35% Ti, 0.03-0.8% Mo, one or more of 0.08% or less Nb, 0.3% or less V and 1.5% or less W, as needed, and the balance Fe with unavoidable impurities, while satisfying the following expression: 0.5≤(C/12)/ä(Ti/48)+(Mo/96)+(Nb/93)+(V/51)+(W/184)}≤1.5, wherein each element represents its content (mass%) and an element which is not included there is regarded as a nil content. After having been nitrocarburized, the nitrocarburized gear has a structure which contains 50% or more bainite by an area rate, and fine precipitates which are precipitated and dispersed in the bainite phase and have grain diameters of less than 10 nm occupy 90% or more of all precipitates. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供生产率和疲劳特性优异的氮碳共渗齿轮，并且优选用于汽车和建筑机械。解决方案：氮碳共渗齿轮以质量％计含有C：0.5％或更少的Si，2.5％或更低的Mn，0.03-0.35％的Ti，0.03-0.8％的Mo，一种或多种0.08％或更少的Nb，0.3％或更少的V和1.5％或更低的W，余量为不可避免的杂质，同时满足以下表达式：0.5≤（C / 12）/ä（Ti / 48）+（Mo /96)+(Nb/93)+(V/51)+(W/184)}≤1.5，其中每个元素表示其含量（质量％），并且不包括在其中的元素被视为无内容。在被氮碳共渗之后，氮碳共渗齿轮具有通过面积率含有50％以上的贝氏体的结构，并且析出并分散在贝氏体相中且粒径小于10nm的微细析出物占90％以上所有沉淀物。版权所有（C）2011，JPO＆INPIT

23. 发明专利

JP2011092984A Method for rolling bar steel 审中-公开
标题翻译：轧钢棒的方法
公开(公告)号：JP2011092984A
公开(公告)日：2011-05-12
申请号：JP2009251267
申请日：2009-10-30
申请人： Jfe Steel Corp , Jfeスチール株式会社
发明人： HINO YOSHIMICHI , HASE KAZUKUNI , KIMURA HIDETO
IPC分类号： B21B1/16
摘要： PROBLEM TO BE SOLVED: To provide a bar steel rolling method capable of reducing the rolling load without degrading any quality of a steel material.
SOLUTION: When a bar steel is manufactured by applying the finish rolling to a rolling stock after a continuously-cast bloom is roughly rolled to obtain the rolling stock for the bar steel, the rolling stock subjected to rough rolling is subjected to the cooling treatment immediately before the finish rolling, the surface temperature of the material to be rolled is adjusted to the temperature range below the Ar
3 point and above the M
S point, and then, the rolling stock is subjected to the finish rolling before the surface temperature exceeds the Ac
3 point.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种能够降低轧制载荷而不降低钢材质量的钢棒轧制方法。解决方案：当连续铸造的坯料粗轧后，通过对轧制坯料进行精轧制造棒钢，得到钢坯的轧制坯料，将经过粗轧的轧制坯料在精轧前的冷却处理中，将待轧制材料的表面温度调节至低于Ar 3 点以上且高于M S S / SB点的温度范围，然后，在表面温度超过Ac 3 点之前，对机车车辆进行精轧。版权所有（C）2011，JPO＆INPIT

24. 发明专利

JP2009228051A Method for producing non-heattreated steel material 有权
标题翻译：生产非热处理钢材的方法
公开(公告)号：JP2009228051A
公开(公告)日：2009-10-08
申请号：JP2008073989
申请日：2008-03-21
申请人： Jfe Steel Corp , Jfeスチール株式会社
发明人： HASE KAZUKUNI , UEI SEISHI , HINO YOSHIMICHI , KIMURA HIDETO
IPC分类号： C21D8/06 , C22C38/00 , C22C38/12 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To provide a method for favorably solving a problem, in paticular, of low yield ratio of a ferritic-pearlite type non-heattreated steel.
SOLUTION: A steel blank comprising, by mass%, 0.30-0.55% C, 0.01-1.2% Si, 0.2-2.0% Mn, ≤0.040% P, ≤0.040% S, 0.005-0.06% Al, 0.05-0.30% V and the balance Fe with inevitable impurities, is heated to ≥1,050°C is rough-rolled, then is subjected to finish rolling having a reduction of area of at least ≥15% in the three-phase region of ferrite-pearlite-austenite.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种有利地解决铁素体 - 珠光体型非热处理钢的低屈服比的问题的方法。解决方案：一种钢坯，其以质量％计含有0.30-0.55％C，0.01-1.2％Si，0.2-2.0％Mn，≤0.040％P，≤0.040％S，0.005-0.06％Al，0.05- 0.30％V，余量为不可避免的杂质，加热至≥150°C，进行粗轧，然后在铁素体 - 珠光体的三相区域进行至少≥15％面积的还原面积的精轧黄铜矿版权所有（C）2010，JPO＆INPIT

25. 发明专利

JP2015040328A 大入熱溶接特性と材質均質性に優れた厚鋼板およびその製造方法有权
标题翻译：高输入焊接特性和材料均匀性优良的钢板及其制造方法
公开(公告)号：JP2015040328A
公开(公告)日：2015-03-02
申请号：JP2013171932
申请日：2013-08-22
申请人： Jfeスチール株式会社 , Jfe Steel Corp
发明人： MURAKAMI YOSHIAKI , HASE KAZUKUNI , ARAO RYO , ENDO SHIGERU
IPC分类号： C22C38/00 , C21D8/02 , C22C38/14 , C22C38/58
CPC分类号： C22C38/58 , C21D8/0226 , C21D8/0263 , C21D2211/002 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/22 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/38 , C22C38/42 , C22C38/48 , C22C38/50 , C22C38/54
摘要：【課題】大入熱溶接特性と鋼板内の材質均質性に優れた厚鋼板およびその製造方法を提供する。【解決手段】質量%で、C:0.030〜0.080%、Si:0.01〜0.10%、Mn:1.20〜2.40%、P:0.008%以下、S:0.0005〜0.0040%、Al:0.005〜0.080%、Nb:0.003〜0.040%、Ti:0.003〜0.040%、N:0.0030〜0.0100%、B:0.0003〜0.0030%、更に、必要に応じて、Cu、Ni、Cr、Mo、V、Ca、Zr、REMの1種または2種以上、残部がFeおよび不可避的不純物からなる成分組成を有し、かつ、板厚方向と板幅方向のそれぞれでのビッカース硬さ(HV)の変動幅:&Dgr;HVが30以下である厚鋼板。上記成分組成の鋼素材を1000〜1300℃の温度に加熱した後、熱間圧延し、引き続く加速冷却の直前に鋼板表面での噴射流の衝突圧が1MPa以上の条件でデスケーリングを行い、その後、加速冷却を行う製造方法。【選択図】なし
摘要翻译：要解决的问题：提供一种钢板的高热输入焊接特性和材料均匀性优异的钢板及其制造方法。解决方案：钢板具有以质量％计含有C： 0.030-0.080％，Si：0.01-0.10％，Mn：1.20-2.40％，P：0.008％以下，S：0.0005〜0.0040％，Al：0.005-0.080％，Nb：0.003-0.040％，Ti：0.003 -0.040％，N：0.0030-0.0100％，B：0.0003-0.0030％，如果需要，可以使用Cu，Ni，Cr，Mo，V，Ca，Zr和REM中的一种或两种以上，其余为Fe和不可避免的杂质。在钢板中，板厚方向和板宽方向上的维氏硬度（HV）的变化范围＆Dgr; HV为30以下。制造钢板的方法包括：在1000-1300℃的温度下加热具有上述成分组成的钢材; 然后热轧，然后加速冷却; 在加速冷却之前，钢板表面上的喷流的碰撞压力为1MPa以上的条件下进行除垢，并执行加速冷却。

26. 发明专利

JP2013136828A Method for manufacturing high-strength thick steel plate for construction excellent in brittleness-cracking propagation-stopping characteristic 有权
标题翻译：制造高强度厚钢板的方法，用于建筑优良的无损裂缝传播停止特性
公开(公告)号：JP2013136828A
公开(公告)日：2013-07-11
申请号：JP2012105734
申请日：2012-05-07
申请人： Jfe Steel Corp , Jfeスチール株式会社
发明人： TAKEUCHI KEIKO , HASE KAZUKUNI , NISHIMURA KIMIHIRO , MITAO SHINJI
IPC分类号： C21D8/02 , C22C38/00 , C22C38/14 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a high-strength thick steel plate having ≥50 mm plate thickness, excellent in brittleness-cracking propagation-stopping characteristic and method for manufacturing the same.SOLUTION: The thick steel plate has a texture, in which {100} directional strength on the rolled surface in the center part of the plate thickness is ≥2.0 and {100} directional strength on the rolled surface in the 1/4 part of the plate thickness is ≥1.2, and has -40°C or lower of Charpy fracture transition temperature in the 1/4 part of the plate thickness, and has the steel composition composed by mass of 0.03-0.20% C, 0.03-0.5% Si, 0.5-2.2% Mn, 0.005-0.08% Al, ≤0.03% P, ≤0.01% S, ≤0.0075% N and one or more elements among Ti, Nb, Cu, Ni, Cr, Mo, V, B, Ca, REM. The steel having the composition, is heated to 900-1,200°C temperature and is rolled into ≥30% cumulative rolling-reduction ratio in the temperature-zone becoming recrystal γ-zone at the center part of the plate-thickness and into ≥50% cumulative rolling-reduction ratio in the temperature zone becoming α+γ zone at the center part of the plate thickness by using lubricant and thereafter, is cooled to 600°C or lower at ≥2°C/s cooling rate, or after the accelerated-cooling, tempering is performed at Acpoint temperature or lower.
摘要翻译：要解决的问题：提供一种板厚度大于50mm，脆性破裂传播阻止特性优异的高强度厚钢板及其制造方法。解决方案：厚钢板具有质地，其中{ 在板厚中心部分的轧制面上的方向强度为≥2.0，板厚1/4的轧制面的{100} <011>方向强度为≥1.2，在板厚的1/4部分中具有-40℃或更低的夏比断裂转变温度，并且具有质量为0.03-0.20％C，0.03-0.5％Si，0.5-2.2％Mn， Ti，Nb，Cu，Ni，Cr，Mo，V，B，Ca，REM中的一种或多种元素，0.005-0.08％Al，≤0.03％P，≤0.01％S，≤0.0075％N。将具有该组成的钢加热至900-1200℃的温度，并且在板厚中心部分的温度区域成为重结晶γ区的轧制压缩率为≥30％，并且达到≥50 通过使用润滑剂，在温度区域成为α+γ区域的板厚中心部的％累积压下率，然后，以≥2℃/ s的冷却速度冷却至600℃以下，或者加速冷却，回火在Acpoint温度或更低温度下进行。

27. 发明专利

JP2012062536A Case-hardening steel and method for producing the same 有权
标题翻译：硬化钢及其制造方法
公开(公告)号：JP2012062536A
公开(公告)日：2012-03-29
申请号：JP2010208303
申请日：2010-09-16
申请人： Jfe Bars & Shapes Corp , Jfe Steel Corp , Jfeスチール株式会社 , Jfe条鋼株式会社
发明人： KASAI MASAYUKI , HASE KAZUKUNI , KIMURA HIDETO , FUKUOKA KAZUAKI , TOMITA KUNIKAZU
IPC分类号： C22C38/00 , B21B1/16 , B22D11/00 , B22D11/22 , C21D8/06 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To provide a case-hardening steel which shows good forgeability even when it is cold-forged, suppresses coarsening of crystal grains attributable to heating for carburization and is excellent in a fatigue characteristics.SOLUTION: The case-hardening steel has composition containing, by mass%, 0.05-0.40% C, ≤1.0% Si, ≤1.0% Mn, ≤0.03% P, ≤0.03% S, ≤2.0% Cr, ≤0.1% Al, 0.05-0.30% Ti, 0.1-0.5% Cu, 0.002-0.02% Sb, ≤0.0060% N, ≤0.0020% O and the balance Fe with inevitable impurities, wherein ≥30 pieces/μmof Ti-containing precipitates having a diameter of ≥30 nm are present, and a ratio, by number, of Ti precipitates having a diameter of 5-50 nm to the total Ti precipitates is ≥50%.
摘要翻译：要解决的问题：为了提供即使在冷锻时也显示出良好的锻造性的表面硬化钢，可以抑制由于加热而导致的渗碳的晶粒粗化，并且疲劳特性优异。＆lt; P＆gt;解决方案：表面硬化钢具有以质量％计含有0.05-0.40％C，≤1.0％Si，≤1.0％Mn，≤0.03％P，≤0.03％S，≤2.0％Cr，≤ 0.1％Al，0.05-0.30％Ti，0.1-0.5％Cu，0.002-0.02％Sb，≤0.0060％N，≤0.0020％O，余量为Fe与不可避免的杂质，其中≥30件/μm

28. 发明专利

JP2011246811A Spring steel and method of manufacturing the same 有权
标题翻译：弹簧钢及其制造方法
公开(公告)号：JP2011246811A
公开(公告)日：2011-12-08
申请号：JP2011019206
申请日：2011-01-31
申请人： Jfe Steel Corp , Jfeスチール株式会社
发明人： HONJO MINORU , HASE KAZUKUNI , KIMURA HIDETO
IPC分类号： C22C38/00 , C21D8/06 , C22C38/34 , C22C38/54
CPC分类号： F16F1/021 , C21D1/25 , C21D8/06 , C21D9/02 , C21D2211/008 , C22C38/04 , C22C38/22 , C22C38/34
摘要： PROBLEM TO BE SOLVED: To provide a high-strength spring steel which suppresses the depth of pitting when corroded and possesses superior resistance to pitting corrosion and corrosion fatigue properties though it is strong, by rationalizing the additive amount of C, Si, Mn, Cr and Mo to a conventional high-strength spring steel, and to provide a preferable method of manufacturing the spring steel.SOLUTION: This spring steel contains greater than 0.35 mass% and less than 0.50 mass% of C, greater than 1.75 mass% and less than or equal to 3.00 mass% of Si, 0.2-1.0 mass% of Mn, 0.01-0.04 mass% of Cr, 0.025 mass% or less of P, 0.025 mass% or less of S, 0.1-1.0 mass% of Mo, and 0.0015 mass% or less of O, under a condition that the value of PC calculated by PC=4.2×([C]+[Mn])+0.1×(1/[Si]+1/[Mo])+20.3×[Cr]+0.001×(1/[N]) is greater than 3.3 and not greater than 8.0.
摘要翻译：要解决的问题：为了提供一种高强度弹簧钢，其在腐蚀时抑制点蚀深度，并且具有优异的抗点腐蚀和耐腐蚀疲劳性能，通过强化，通过使添加量C，Si， Mn，Cr，Mo配合到现有的高强度弹簧钢中，提供优选的弹簧钢的制造方法。解决方案：该弹簧钢含有大于0.35质量％且小于0.50质量％的C，大于1.75质量％且小于或等于3.00质量％的Si，0.2-1.0质量％的Mn，0.01〜 0.04质量％的Cr，0.025质量％以下的P，0.025质量％以下的S，0.1〜1.0质量％的Mo和0.0015质量％以下的O，在PC的计算值 = 4.2×（[C] + [Mn]）+ 0.1×（1 / [Si] + 1 / [Mo]）+ 20.3×[Cr] + 0.001×（1 / [N]）大于3.3而不大于8.0。版权所有（C）2012，JPO＆INPIT

29. 发明专利

JP2011200878A Method for rolling steel bar 审中-公开
标题翻译：滚钢棒方法
公开(公告)号：JP2011200878A
公开(公告)日：2011-10-13
申请号：JP2010068452
申请日：2010-03-24
申请人： Jfe Steel Corp , Jfeスチール株式会社
发明人： HINO YOSHIMICHI , HASE KAZUKUNI , KIMURA HIDETO
IPC分类号： B21B1/16 , B21B43/00
摘要： PROBLEM TO BE SOLVED: To provide a method for rolling a steel bar, in which temperature control which is bearable to controlled rolling is made possible by performing appropriate cooling required for steel by separating rolling processing and cooling processing and performing them respectively and independently.SOLUTION: When manufacturing the steel bar by applying finish rolling to a base stock for rolling after subjecting a bloom subjected to continuous casting to rough rolling to form the base stock for rolling of the steel bar, arrangement interval between a roughing mill and a finishing mill is longer than the length of the base stock for rolling completing the rough rolling and a cooling zone is provided in that interval, and the cooling of the base stock for rolling in the cooling zone is performed independently without synchronizing with the rolling processing.
摘要翻译：要解决的问题：提供一种用于轧制钢棒的方法，其中通过分离轧制处理和冷却处理进行适当的冷却处理并分别独立地执行，可以进行可控制轧制的温度控制。：通过对连续铸造后的坯料进行粗轧后的轧制用基材进行精轧而形成钢棒的轧制用基材，粗轧机与精轧机之间的配置间隔为比在粗轧过程中轧制的坯料的长度长，并且在该间隔内设置冷却区域，并且在冷却区域中用于轧制的基材的冷却独立地进行而不与轧制处理同步。

30. 发明专利

JP2010229512A Method for producing ferrite-pearlite type rolled non-heat treated steel material 有权
标题翻译：生产铁素体 - 梨石型热轧非热处理钢材的方法
公开(公告)号：JP2010229512A
公开(公告)日：2010-10-14
申请号：JP2009079571
申请日：2009-03-27
申请人： Jfe Steel Corp , Jfeスチール株式会社
发明人： HASE KAZUKUNI , HINO YOSHIMICHI , KIMURA HIDETO
IPC分类号： C21D8/06 , C22C38/00 , C22C38/12 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To provide a method for attaining a steel material having high strength and toughness under non-heat treatment without increasing the amount of alloy components in a steel material.
SOLUTION: When hot-rolling a base steel material comprising, by mass%, 0.30-0.55% C, 0.01-1.2% Si, more than 1.8% to 2.5% Mn, 0.040% or less P, 0.040% or less S, 0.005-0.06% Al, 0.05-0.20% V, and the balance Fe with unavoidable impurities, this producing method includes controlling the reduction of area in a specific temperature zone in a rough-rolling process to 25% or less, subsequently finish-rolling the steel material with 25% or more of the reduction of the area in a specific temperature zone, and cooling the rolled steel to 550°C at a cooling rate of less than 5°C/s.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：解决的问题：提供一种在不加热钢材中的合金成分量的情况下，在非热处理下获得具有高强度和韧性的钢材的方法。解决方案：当以质量％计含有0.30-0.55％C，0.01-1.2％的Si，大于1.8％至2.5％的Mn，0.040％或更少的P，0.040％或更少的基本钢材时， S，0.005-0.06％Al，0.05-0.20％V，余量为Fe和不可避免的杂质，该制造方法包括控制粗轧过程中特定温度区域的面积减少至25％以下，随后完成在特定温度区域中减少25％以上的面积的钢材，并以小于5℃/ s的冷却速度将轧制钢冷却至550℃。版权所有（C）2011，JPO＆INPIT

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