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1. 发明专利

JPS5789426A MANUFACTURE OF HIGH-HARDNESS AND WEAR RESISTANT STEEL HAVING EXCELLENT WELDABILITY 失效
公开(公告)号：JPS5789426A
公开(公告)日：1982-06-03
申请号：JP16301280
申请日：1980-11-19
申请人： NIPPON STEEL CORP
发明人： OKAMOTO KENTAROU , YAMABA RIYOUTA , NAKAO HITOSHI
IPC分类号： C22C38/00 , C21D6/00 , C21D8/00 , C21D8/02 , C22C38/50
摘要： PURPOSE:To manufacture a steel having good toughness at low temperatures and excellent weldability by rooling and cooling a steel material containing specific proportions of C, Si, Mn, Al, Cu, and Ni under specific conditions. CONSTITUTION:A steel material, containing 0.08-0.25% C, 0.10-0.60% Si, 0.50- 2.00% Mn, and Fe and inevitable impurities, together with, as needed, one or two or more of 0.10% or less Al, 1.0% or less Cu, 1.0% or less Ni, 1.0% or less Cr, 0.60% or less Mo, 0.10% or less V, 0.10% or less Nb, 0.15% or less Ti, and 0.005% or less B, is prepared. The steel material is heated to 1,000 deg.C or more, rolled at a temperature above 850 deg.C, and the cooled from 800 deg.C or more to a temperature below 150 deg.C at a cooling rate of 20 deg.C/sec or more.

2. 发明专利

JPS5511104A MANUFACTURE OF NONNTEMPER ROLLED STEEL HAVING HIGH DIMENSION ACCURACY 失效
公开(公告)号：JPS5511104A
公开(公告)日：1980-01-25
申请号：JP8143578
申请日：1978-07-06
申请人： NIPPON STEEL CORP
发明人： SATOU MAKOTO , OKAMOTO KENTAROU , KANETANI KEN
IPC分类号： B21B3/02 , B21B3/00 , C21D6/00 , C21D8/00 , C21D8/02 , C22C38/00 , C22C38/12 , C22C38/14
摘要： PURPOSE:To manufacture non-temper rolled steel material of high dimension accuracy, by regulating the chemical composition and rolling conditions. CONSTITUTION:A steel, which comprises

3. 发明专利

JPS5370911A PPCONTAINING HIGHLY WELDABLE CORROSION RESISTANT STEEL 失效
公开(公告)号：JPS5370911A
公开(公告)日：1978-06-23
申请号：JP14639476
申请日：1976-12-06
申请人： NIPPON STEEL CORP
发明人： KADO SATOSHI , WATANABE TSUNEYASU , SATOU MAKOTO , OKAMOTO KENTAROU , KATOU CHIYUUICHI , KANETANI KEN , MASUDA KAZUHIRO
IPC分类号： C22C38/00 , C22C38/12 , C22C38/58
摘要： PURPOSE:To provide a P-contg. corrosion resistant steel of high weldability and corrosion resistnace suitable for use as a material for welded structures used in a corrosive atmosphere by making the C content of steel contg. P and Mo ultra low.

4. 发明专利

JPS59136418A Preparation of high toughness and high strength steel 失效
标题翻译：高韧度和高强度钢的制备
公开(公告)号：JPS59136418A
公开(公告)日：1984-08-06
申请号：JP990683
申请日：1983-01-26
申请人： Nippon Steel Corp
发明人： YAMABA RIYOUTA , OKAMOTO KENTAROU
IPC分类号： B21B3/00 , C21D8/00 , C21D8/02 , C22C38/00
CPC分类号： C21D8/00
摘要： PURPOSE:To inexpensively prepare steel having high toughness and high strength, by successively applying hot rolling, quenching and tempering to steel containing C, Si, Mn, Mo, Ti, Nb, Ti and Al in a specific ratio under a specific condition. CONSTITUTION:Steel containing, on a wt. basis, 0.04-0.10% C, 1.0% or less Si, 0.50-2.00% Mn, 0.1-1.0% Mo, 0.005-0.5% Ti, 0.005-0.05% Nb, 0.01% or less B, 0.1% or less Al, according to necessity, one or more of 1% or less Cr, 0.1% or less V, 1% or less Cu and 0.01% or Ca and comprising the remaindr of iron and inevitable impurites are hot rolled at a heating temp. of 1,150 deg.C or more and a rolling finish temp. 850 deg.C or more. After rolling, the rolled steel is directly quenched to 200 deg.C or less and subjected to tempering heat treatment at a Ac1 point max. By this method, steel with tensile strength of about 80kg/mm. is inexpensively prepared.
摘要翻译：目的：为了廉价地制备具有高韧性和高强度的钢，通过在特定条件下以特定比例对含有C，Si，Mn，Mo，Ti，Nb，Ti和Al的钢进行热轧，淬火和回火。构成：含有，基础，0.04-0.10％C，1.0％以下Si，0.50〜2.00％Mn，0.1〜1.0％Mo，0.005〜0.5％Ti，0.005〜0.05％Nb，0.01％以下B，0.1％以下Al，根据需要，将1％以下的Cr，0.1％以下的V，1％以下的Cu和0.01％或Ca中的一种或多种，并且包含铁和残余物的残余物在加热温度下热轧。为1150℃以上，轧制温度为 850℃以上。轧制后，将轧制钢直接淬火至200℃以下，在Ac1点以上进行回火热处理。通过该方法，低成本地制备了拉伸强度为约80kg / mm 2的钢。

5. 发明专利

JPS57210915A MANUFACTURE OF REFINED HIGH TENSILE STEEL WITH HIGH TOUGHNESS 失效
公开(公告)号：JPS57210915A
公开(公告)日：1982-12-24
申请号：JP9634281
申请日：1981-06-22
申请人： NIPPON STEEL CORP
发明人： YAMABA RIYOUTA , OKAMOTO KENTAROU
IPC分类号： C22C38/00 , C21D8/00 , C21D8/02 , C21D9/52
摘要： PURPOSE:To obtain the titled steel having >=100mm. thickness by forming a steel contg. specified amounts of C, Si, Mn, Al, B and N as basic componets into a slab, heating the slab to a specified temp., hot rolling it, and hardening and tempering the hot rolled plate after cooling to below a cooling temp. corresponding to the heating temp. CONSTITUTION:A steel contg., by weight, 0.05-0.25% C, 0.05-0.6% Si, 0.3-2% Mn, 0.02-0.1% Al, 0.0003-0.005% B and 0.002-0.012% N as basic components or contg. further >=1 kind of element selected from =1,100 deg.C heating temp. TO and hot rolled. The hot rolled plate is cooled to

6. 发明专利

JPS57169019A PRODUCTION OF NONREFINED TOUGH AND HARD HIGH TENSILE STEEL PLATE 失效
公开(公告)号：JPS57169019A
公开(公告)日：1982-10-18
申请号：JP5186681
申请日：1981-04-08
申请人： NIPPON STEEL CORP
发明人： OKAMOTO KENTAROU , YAMABA RIYOUTA , TOMITA YUKIO
IPC分类号： C21D8/02 , C21D8/00 , C22C38/00 , C22C38/50
摘要： PURPOSE:To produce a nonrefined tough and hard high tensile steel plate of various outstanding properties by treating steel contg. specific range amts. of C, Si, Mn and Al as basic components by combining heating and rolling conditions and cooling conditions properly. CONSTITUTION:The steel consisting basically of =1 kind of Nb, V, Ti, Ni, Cu, Cr, Mo, Ca, REM and consisting of the balance Fe and unavoidable impurities is heated to a 1,000-1,150 deg.C temp. range, after which it is hot-rolled by setting the rolling reduction in a 800-1,000 deg.C temp. range at >=30%, assuring >=60% rolling reduction at =10 deg.C/sec. cooling rate, whereby the desired steel plate is obtained.

7. 发明专利

JPS5773124A Production of steel material having high breakdown toughness 失效
标题翻译：生产具有高破裂韧性的钢材
公开(公告)号：JPS5773124A
公开(公告)日：1982-05-07
申请号：JP14972480
申请日：1980-10-25
申请人： Nippon Steel Corp
发明人： OKAMOTO KENTAROU , NAKAO HITOSHI , YAMABA RIYOUTA , TOMITA YUKIO , IGARI SHIGENORI
IPC分类号： C21D8/02 , C21D8/00 , C22C38/00 , C22C38/12 , C22C38/54
摘要： PURPOSE: To eliminate the degrading characteristic in the central part of plate thickness and improve breakdown toughness by hot rolling a steel material ingot cont. prescribed amts. of C, Mn, P, S as basic components under specific conditions.
CONSTITUTION: A steel contg. ≤0.3% C, 0.5W2.5% Mn, ≤0.02% P, and ≤0.01% S as basic components and if necessary, contg. other specific elements is produced. The ingot produced by continuosly casting this steel is heated to rollable temps., after which it is reduced of thickness down to intermediate stage thickness under the conditions wherein the composite pass rolling effect (CIRE) expressed by the equation is kept at ≤0.02. Thence, it is subjected to heat treatment according to the intermediate stage thickness, after which it is hot-rolled down to the final thickness.
COPYRIGHT: (C)1982,JPO&Japio
摘要翻译：目的：消除钢板中心部分的降解特性，并通过热轧钢材锭来提高击穿韧性。规定的。的C，Mn，P，S作为基本成分。构成：钢筋 <= 0.3％C，0.5-2.5％Mn，<= 0.02％P和<= 0.01％S作为基本组分，如果需要，产生其他具体要素。通过连续铸造该钢而制造的铸锭被加热到可轧制的温度，然后在由等式表示的复合通过轧制效应（CIRE）保持在<= 0.02的条件下将厚度减小到中间阶段的厚度。然后，根据中间层厚度进行热处理，之后将其热轧至最终厚度。

8. 发明专利

JPS59211529A Production of ultra-thick 50kg/cm2 steel having excellent weldability 失效
标题翻译：生产具有优异焊接性能的超薄50KG / CM2钢
公开(公告)号：JPS59211529A
公开(公告)日：1984-11-30
申请号：JP8631083
申请日：1983-05-17
申请人： Nippon Steel Corp
发明人： YAMABA RIYOUTA , OKAMOTO KENTAROU , TANAKA ATSUO
IPC分类号： C22C38/00 , C21D8/02 , C22C38/12 , C22C38/38 , C22C38/58
CPC分类号： C21D8/02
摘要： PURPOSE:To obtain a titled steel having good low temp. toughness down to the central part of the plate thickness while maintaining a low C equiv. by limiting a heating temp., rolling conditions and method, and force cooling conditions in the stage of subjecting a specifically composed steel to heating, rolling, force cooling, and tempering. CONSTITUTION:A steel contg., by weight, 0.03-0.20 C, 0.05-0.60 Si, 0.50-2.5 Mn, 0.005-0.10 Nb, and 0.005-0.1 Al, contg., if necessary, >=1 kind among =2 passes of >=50% cumulative draft and >=0.50 rolling shape ratio expressed by the equation (R: radius of rolling roll, h1, h2: the plate thicknesses on the rolling inlet and outlet sides, DELTAh: h1-h2) between 850-730 deg.C rolling temp. The rolled plate is subjected to force cooling at >=0.5m /m .min water flow density until the center of the plate thickness attains
摘要翻译：目的：获得具有良好低温的标准钢。韧性下降到板厚的中心部分，同时保持低C等于。通过限制加热温度，轧制条件和方法，以及在特定组成的钢进行加热，轧制，强制冷却和回火的阶段中的强制冷却条件。构成：重量比为0.03-0.20℃，0.05-0.60Si，0.50-2.5Mn，0.005-0.10Nb和0.005-0.1Al的钢，如果需要，<= 1.0 Cr，<= 2.0 Ni，<= 1.0 Mo，<= 0.1 V，<= 0.15 Ti，<= 0.5 Cu和<= 0.01 Ca，由余量组成，Fe被加热到AC3-1,150℃，然后进行轧制，其中> = 2次通过> = 50％累积牵伸和> = 0.50轧制形状比由公式表示（R：轧制辊的半径，h1，h2：轧制出口侧的板厚度，DELTAh ：h1-h2）850-730℃滚动温度轧制板在> = 0.5m 3 / m 2 / min水流密度下进行强制冷却，直到轧制后的板厚中心达到<= 250℃，然后在铁素体中回火地区。

9. 发明专利

JPS58204152A P-containing low-mn high-tension steel with high weldability and corrosion resistance 失效
标题翻译：含低含量高耐磨性和耐腐蚀性的低MN高强度钢
公开(公告)号：JPS58204152A
公开(公告)日：1983-11-28
申请号：JP8759082
申请日：1982-05-24
申请人： Nippon Steel Corp
发明人： HAJI TOSHIAKI , WATANABE TSUNEYASU , KANETANI KEN , OKAMOTO KENTAROU , TSUDA YUKIO
IPC分类号： C22C38/00 , C22C38/06 , C22C38/14 , C22C38/42 , C22C38/54
摘要： PURPOSE: To obtain a high tension steel for a structural material with improved corrosion resistance and weldability by reducing the amounts of O and Mn in a low C-P-low S-low N steel, adding Ca, and carrying out rolling and accelerated cooling.
CONSTITUTION: This P-contg. low-Mn high-tension steel with high weldability and corrosion resistance consists of ≤0.07% C, ≤1.0% Si, ≤1.0% Mn, 0.05W 0.20% P, ≤0.010% S, 0.003W0.2% Al, ≤0.004% N, 0.002W0.010% Ca, ≤0.0030% O and the balance essentially Fe or further contains ≤2.0% in total of one or more among Cu, Ni, Cr, and Mo. To the composition may be added ≤0.15% in total of one or more among Nb, V, Ti, Zr, Ta and B. The steel is rolled and acceleratedly cooled. Since the steel has ≥about 50kg/mm
2 strength, superior durability and weldability, it is suitable for use as a material for a welded structure used in a corrosive environment.
COPYRIGHT: (C)1983,JPO&Japio
摘要翻译：目的：通过减少低C-P低S低N钢中的O和Mn量，通过加入Ca并进行轧制和加速冷却，获得具有改善的耐腐蚀性和焊接性的结构材料的高压钢。构成：这个P-contg。具有高焊接性和耐腐蚀性的低Mn高强度钢由<= 0.07％C，<= 1.0％Si，<= 1.0％Mn，0.05-0.20％P，<= 0.010％S，0.003-0.2％Al ，<0.004％N，0.002-0.010％Ca，<= 0.0030％O，余量基本上为Fe，或者在Cu，Ni，Cr和Mo中总共含有<= 2.0％的一种或多种。在Nb，V，Ti，Zr，Ta和B中总共添加≤0.15％的一种或多种。将钢轧制并加速冷却。由于钢的强度≥50kg/ mm 2，强度高，耐久性好，焊接性好，因此适用于腐蚀性环境中使用的焊接结构材料。

10. 发明专利

JPS5861223A MANUFACTURE OF UNNORMALIZED HIGH TENSION STEEL OF HIGHER WELDABILITY CLASS THAN 50KG/MM2 WITH SUPERIOR QUALITATIVE CHARACTERISTIC IN Z DIRECTION 失效
公开(公告)号：JPS5861223A
公开(公告)日：1983-04-12
申请号：JP15991881
申请日：1981-10-07
申请人： NIPPON STEEL CORP
发明人： YAMABA RIYOUTA , OKAMOTO KENTAROU , TOMITA YUKIO , SASAJI TAKASHI , SEKIYA KOUICHI
IPC分类号： C22C38/00 , C21D8/00 , C21D8/02 , C22C38/16
摘要： PURPOSE:To obtain the titled steel equal or superior to a conventional steel in toughness and much superior to it in weldability even if cooled intensely after controlled rolling by specially combining the composition of a steel with the heating temp. of the slab, the slight controlled rolling and the cooling stopping temp. CONSTITUTION:A steel consisting of 0.03-0.20% C, 0.05-0.60% Si, 0.6-2.5% Mn, 0.005-0.1% T.Al and the balance Fe with inevitable impurities or further contg. one or more among =15 deg.C/ sec cooling rate, the accelerated cooling is stopped at 400-600 deg.C, and the steel is allowed to cool. The Ceq value is obtd. by the equation.

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