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    Steel For Machine Structural Use With Excellent Strength, Ductility, And Toughness And Method For Producing The Same
    7.
    发明申请
    Steel For Machine Structural Use With Excellent Strength, Ductility, And Toughness And Method For Producing The Same 审中-公开
    钢结构使用优良的强度，延性和韧性及其生产方法

    公开(公告)号：US20080017283A1

    公开(公告)日：2008-01-24

    申请号：US11795192

    申请日：2006-06-30

    申请人： Keiichi Maruta ,  Tohru Hayashi ,  Nobutaka Kurosawa ,  Hideto Kimura ,  Takaaki Toyooka ,  Kazukuni Hase ,  Katsumi Yamada

    发明人： Keiichi Maruta ,  Tohru Hayashi ,  Nobutaka Kurosawa ,  Hideto Kimura ,  Takaaki Toyooka ,  Kazukuni Hase ,  Katsumi Yamada

    IPC分类号： C21D9/46 ,  C22C38/00

    CPC分类号： C21D9/46 ,  C22C38/00

    摘要： A steel for machine structural use with a better strength-ductility-toughness balance than maraging steel and applications thereof are provided. The steel for machine structural use with excellent strength, ductility, and toughness contains, in percent by mass, more than 0.30% to 0.5% of carbon, 1.0% or less of silicon, 1.5% or less of manganese, 0.025% or less of aluminum, 0.3% to 0.5% of molybdenum, and 0.0005% to 0.01% of boron, and the balance is iron and incidental impurities. The steel has a structure including at least 90% by volume of martensitic structure. The martensitic structure includes blocks having a size of 1.5 μm or less. Dissolved boron is contained in an amount of at least 0.0005% and is present at boundaries of prior austenite grains in a concentration at least 1.5 times that in the prior austenite grains.

    摘要翻译： 提供了一种具有比马氏体时效钢更好的强度 - 延性 - 韧性平衡的机械结构用钢及其应用。 具有优异的强度，延展性和韧性的机械结构用钢，以质量％计含有超过0.30％〜0.5％的碳，1.0％以下的硅，1.5％以下的锰，0.025％以下的 铝，0.3〜0.5％的钼和0.0005〜0.01％的硼，余量为铁和杂质。 该钢具有至少90体积％的马氏体组织。 马氏体结构包括尺寸为1.5μm或更小的块。 溶解硼的含量至少为0.0005％，并且在现有奥氏体晶粒的边界处，其浓度至少为现有奥氏体晶粒中的1.5倍。

    Hot Forging Facility
    9.
    发明申请
    Hot Forging Facility 有权
    热锻厂

    公开(公告)号：US20090126451A1

    公开(公告)日：2009-05-21

    申请号：US11921320

    申请日：2006-06-05

    申请人： Kazukuni Hase ,  Hideto Kimura ,  Takaaki Toyooka

    发明人： Kazukuni Hase ,  Hideto Kimura ,  Takaaki Toyooka

    IPC分类号： B21D43/00

    CPC分类号： B21J1/06 ,  B21J9/022 ,  B21K1/08 ,  B21K1/40 ,  B21K29/00 ,  C21D1/18 ,  C21D1/667 ,  C21D7/13 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06

    摘要： A hot forging facility enabling the manufacture of a hot forged product excellent in fatigue properties and cold workability is provided. A heating furnace for heating a steel material and a hot forging apparatus for perfonning forging of the heated steel material are sequentially arranged on a transport line. A partially cooling apparatus/apparatuses for partially cooling a forged product after hot forging is provided on an exit side of the hot forging apparatus.

    摘要翻译： 提供了一种能够制造疲劳性能和冷加工性优异的热锻产品的热锻设备。 用于加热钢材的加热炉和用于加热钢材的锻造的热锻设备被顺序地布置在输送线上。 在热锻设备的出口侧设置用于在热锻后部分冷却锻造产品的部分冷却装置/设备。

    High-Strength Steel and Metal Bolt Excellent In Character of Delayed Fracture
    10.
    发明申请
    High-Strength Steel and Metal Bolt Excellent In Character of Delayed Fracture 审中-公开
    高强度钢和金属螺栓优良延迟断裂性质

    公开(公告)号：US20080264524A1

    公开(公告)日：2008-10-30

    申请号：US11922746

    申请日：2006-10-27

    申请人： Keiichi Maruta ,  Tohru Hayashi ,  Nobutaka Kurosawa ,  Hideto Kimura ,  Takaaki Toyooka ,  Kazukuni Hase

    发明人： Keiichi Maruta ,  Tohru Hayashi ,  Nobutaka Kurosawa ,  Hideto Kimura ,  Takaaki Toyooka ,  Kazukuni Hase

    IPC分类号： C22C38/54

    CPC分类号： C21D1/25 ,  C21D1/10 ,  C21D7/02 ,  C21D9/0093 ,  C21D2211/008 ,  C22C38/00 ,  Y02P10/253

    摘要： A high-strength steel having excellent character of delayed fracture can be manufactured at a low cost without adding expensive alloy elements such as Ni, Co or V in large quantities. The steel including a steel microstructure in which a ratio of martensite phase is 90% or more and a diameter of prior austenite grains is 10 μm or less, the steel microstructure being made by hardening and then tempering at 100° C. to 400° C., the steel including C: more than 0.30% and not more than 0.50% by mass, Si: not more than 1.0% by mass, Mn: not more than 1.5% by mass, Ti: not more than 0.1% by mass, Mo: not less than 0.3% and not more than 0.50% by mass, B: not less than 0.0005% and not more than 0.01% by mass, and a balance composed of Fe and inevitable impurities.

    摘要翻译： 可以以低成本制造具有优异延迟断裂特性的高强度钢，而不需要大量添加诸如Ni，Co或V的昂贵的合金元素。 包括马氏体相的比率为90％以上，原奥氏体晶粒直径为10μm以下的钢组织的钢，钢组织通过硬化然后在100℃回火至400℃ 包括C：大于0.30％且不大于0.50质量％的钢，Si：不大于1.0质量％，Mn：不大于1.5质量％，Ti：不大于0.1质量％ Mo：0.3％以上且0.50质量％以下，B：0.0005％以上且0.01质量％以下，余量由Fe和不可避免的杂质构成。