公开(公告)号：US06896746B2

公开(公告)日：2005-05-24

申请号：US10240952

申请日：2001-04-04

申请人： Kiichiro Tsuchida ,  Koji Tanabe ,  Koji Adachi ,  Seiji Ito

发明人： Kiichiro Tsuchida ,  Koji Tanabe ,  Koji Adachi ,  Seiji Ito

IPC分类号： C21D7/13 ,  C21D8/06 ,  C21D9/573 ,  C22C38/04 ,  C22C38/18 ,  C22C37/02 ,  C22C38/00

CPC分类号： C21D8/06 ,  C21D7/13 ,  C21D9/5732 ,  C21D2211/003 ,  C21D2211/005 ,  C21D2211/009 ,  C22C38/04 ,  C22C38/18

摘要： A steel wire rods and bars for machine structural use having, in the as-hot-rolled state, the same cold workability as a conventional steel wire rods and bars subjected to softening annealing after hot rolling, and a production method thereof are provided. This hot-rolled wire rods and bars usable for machine structural use without annealing comprises, in terms of mass %, C: 0.1 to 0.5%, Si: 0.01 to 0.5%, Mn: 0.3 to 1.5% and the balance of Fe and unavoidable impurities and if desired, comprises strengthening elements, wherein the microstructure of steel is composed of ferrite and pearlite, the ferrite grain size is No. 11 or more as defined in JIS G 0552, a granular carbide having an equivalent-circle diameter of 2 μm or less and an aspect ratio of 3 or less is contained in an area ratio of 5 to 40%, and the steel wire rods and bars has a tensile strength TS (MPa)≦573×Ceq+257 and a reduction of area RA (%)≧−23×Ceq+75 (wherein Ceq=C+Si/7+Mn/5+Cr/9+Mo/2).

摘要翻译： 提供了一种用于机加工结构的钢线材和棒材，其在热轧状态下具有与在热轧后进行软化退火的常规钢丝棒和棒相同的冷加工性及其制造方法。 这种用于机械结构使用而不退火的热轧线材和棒材以质量％计含有C：0.1〜0.5％，Si：0.01〜0.5％，Mn：0.3〜1.5％，余量由Fe和不可避免 杂质，如果需要，包括强化元素，其中钢的微结构由铁素体和珠光体组成，铁素体晶粒尺寸为JIS G0552中定义的11号以上，当量圆直径为2μm的颗粒状碳化物 面积比为5〜40％，纵横比为3以下，钢线棒和拉伸强度TS（MPa）<= 573×Ceq + 257，面积RA（％ ）= 23×Ceq + 75（Ceq = C + Si / 7 + Mn / 5 + Cr / 9 + Mo / 2）。

公开(公告)号：US06634073B1

公开(公告)日：2003-10-21

申请号：US09744370

申请日：2001-01-23

申请人： Koji Adachi ,  Koji Tanabe ,  Ryuichi Seki ,  Kiichiro Tsuchida

发明人： Koji Adachi ,  Koji Tanabe ,  Ryuichi Seki ,  Kiichiro Tsuchida

IPC分类号： B23P2306

CPC分类号： C21D9/5732 ,  B21B1/18 ,  B21C47/26 ,  C21D8/06 ,  Y10T29/5184 ,  Y10T29/5187

摘要： The present invention relates a train of in-line continuous manufacturing equipment for producing steel wire, considered difficult with a block mill up to now, capable of efficiently carrying out controlled-rolling and slow-cooling by an effective in-line combination of controlled rolling apparatuses and slow cooling apparatuses, having a hot rolling mill for steel wire, a winder to wind the rolled steel wire into rings, bundling apparatuses to pack the wound steel wire into bundled coils and an in-line heat treatment furnace to slow-cool the steel wire bundled into coils, which are sequentially connected, and using, preferably, a block mill with an area reduction rate of 25 to 60% having at most 4 roll stands as a final finish rolling mill of the hot rolling mill.

摘要翻译： 本发明涉及一种用于生产钢丝的在线连续制造设备的列车，其至今被认为难以使用块式铣刀，能够通过有效的控制轧制组合有效地进行控制滚动和缓慢冷却 具有用于钢丝的热轧机，卷绕机将卷绕的钢丝卷绕成环的装置和缓慢冷却装置，将卷绕的钢丝包装成捆扎线圈的捆扎装置和直列式热处理炉，以缓慢冷却 将钢丝捆扎成线圈，将其连续地连接起来，优选使用面积减少率为25〜60％的块式研磨机，最多具有4台轧机机架作为热轧机的最终精轧机。

公开(公告)号：US06551419B2

公开(公告)日：2003-04-22

申请号：US09829742

申请日：2001-07-06

申请人： Hideo Kanisawa ,  Tatsuro Ochi ,  Manabu Kubota ,  Koji Tanabe ,  Kiichiro Tsuchida

发明人： Hideo Kanisawa ,  Tatsuro Ochi ,  Manabu Kubota ,  Koji Tanabe ,  Kiichiro Tsuchida

IPC分类号： C22C3802

CPC分类号： C21D8/06 ,  C21D7/13 ,  C21D9/5732 ,  C21D2211/003 ,  C21D2211/005

摘要： The present invention provides a hot rolled steel wire rod or bar for machine structural use having, in the as-hot-rolled condition, cold workability equal to that of the conventional wire rods or bars softened through annealing after hot rolling, and a method to produce the same: and relates to a hot rolled steel wire rod or bar for machine structural use, characterized in that; the wire rod or bar is made from a steel consisting of, in weight, 0.1 to 0.5% of C, 0.01 to 0.5% of Si, 0.3 to 1.5% of Mn, and the balance comprising Fe and unavoidable impurities and containing strengthening elements as required; its microstructure consists of ferrite and pearlite; its ferrite crystal grain size number defined under Japanese Industrial Standard (JIS) G 0552 is 11 or higher; and a granular carbide 2 &mgr;m or less in circle-equivalent diameter and having an aspect ratio of 3 or less accounts for a percentage area of 3 to 15%.

摘要翻译： 本发明提供一种用于机械结构用途的热轧钢线材或棒材，其在热轧条件下具有与通过热轧后退火软化的常规线材或棒材相当的冷加工性能，以及 制造相同的材料：涉及用于机械结构用途的热轧钢线材或棒材，其特征在于： 线材或棒材由重量为0.1〜0.5％的C，0.01〜0.5％的Si，0.3〜1.5％的Mn，余量由Fe和不可避免的杂质构成的钢制成，含有强化元素为 需要; 其微结构由铁素体和珠光体组成; 日本工业标准（JIS）G 0552规定的铁素体晶粒尺寸数为11以上; 圆周当量直径为2μm以下，长径比为3以下的粒状碳化物占3〜15％的面积的比例。

公开(公告)号：US06547890B2

公开(公告)日：2003-04-15

申请号：US09829768

申请日：2001-04-10

申请人： Hideo Kanisawa ,  Tatsuro Ochi ,  Manabu Kubota ,  Koji Tanabe ,  Kiichiro Tsuchida

发明人： Hideo Kanisawa ,  Tatsuro Ochi ,  Manabu Kubota ,  Koji Tanabe ,  Kiichiro Tsuchida

IPC分类号： C21D806

CPC分类号： C21D9/525 ,  C21D1/32 ,  C21D8/06 ,  C22C38/04 ,  C22C38/06

摘要： The present invention provides a steel wire rod for cold forging which can be spheroidizing-annealed in an as hot-rolled state without requiring preliminary drawing and can have high ductility after the spheroidizing annealing, and a method to produce the same: and is characterized in that; the steel contains, by weight, 0.1 to 0.5% of C, 0.01 to 0.5% of Si and 0.3 to 1.5% of Mn, with the balance consisting of Fe and unavoidable impurities, and further contains hardening elements as required; and the steel has a prior austenite grain size number, defined under Japanese Industrial Standard (JIS) G 0551, of 11 or higher, the amount of diffusible hydrogen in the steel measured by the programmed temperature gas chromatography being 0.2 ppm or less, and the hardness being Hv 250 to 700. The production method is characterized by: hot rolling the steel at a low temperature; rapidly cooling and tempering the wire rod thus rolled by holding it in a furnace atmosphere controlled in the temperature range of 300 to 600° C. for 15 min. or longer but shorter than 1 h.; and then applying spheroidizing annealing as required.

公开(公告)号：US06475306B1

公开(公告)日：2002-11-05

申请号：US09829741

申请日：2001-04-10

申请人： Hideo Kanisawa ,  Tatsuro Ochi ,  Manabu Kubota ,  Koji Tanabe ,  Kiichiro Tsuchida

发明人： Hideo Kanisawa ,  Tatsuro Ochi ,  Manabu Kubota ,  Koji Tanabe ,  Kiichiro Tsuchida

IPC分类号： C22C3804

CPC分类号： C21D8/065 ,  C21D8/06 ,  C21D2211/003 ,  C21D2211/005 ,  C21D2211/009 ,  C22C38/02 ,  C22C38/04 ,  C22C38/44

摘要： The present invention provides a hot rolled steel wire rod or bar for machine structural use having, even when a spheroidizing annealing time is reduced, cold workability equal to that of the wire rods or bars treated through conventional spheroidizing annealing of a long treatment time, as a result of controlling a metallographic structure, and a method to produce the same: and relates to a hot rolled steel wire rod or bar for machine structural use, characterized in that; the wire rod or bar is made from a steel consisting of, in weight, 0.1 to 0.5% of C, 0.01 to 0.5% of Si, 0.3 to 1.5% of Mn, and the balance comprising Fe and unavoidable impurities and containing hardening elements as required; its microstructure consists of ferrite and pearlite; its ferrite crystal grain size number defined under Japanese Industrial Standard (JIS) G 0552 is 11 or higher; the granular carbide 2 &mgr;m or less in circle-equivalent diameter and having an aspect ratio of 3 or less accounts for a percentage area of 3 to 15%; and its hardness (Hv) satisfies the expression below, 165 Ceq+73.5≦Hv≦195 Ceq+73.5 (where, Ceq=C%+1/7 Si%+1/5 Mn%+1/9 Cr%).

摘要翻译： 本发明提供一种用于机械结构用途的热轧钢线材棒，即使当球化退火时间降低时，与通过长处理时间的常规球化退火处理的线棒或棒的冷加工性等同于， 控制金相结构的结果及其制造方法：涉及一种用于机械结构用途的热轧钢线材或棒材，其特征在于： 线材或棒材由钢组成，其重量为C：0.1〜0.5％，Si：0.01〜0.5％，Mn：0.3〜1.5％，余量由Fe和不可避免的杂质构成，含有硬化元素 需要; 其微结构由铁素体和珠光体组成; 日本工业标准（JIS）G 0552规定的铁素体晶粒尺寸数为11以上; 圆当量直径为2μm或更小，纵横比为3或更小的颗粒状碳化物占3％至15％的百分比面积; 其硬度（Hv）满足下式（Ceq = C％+ 1 / 7Si％+ 1 / 5Mn％+ 1 / 9Cr％）。