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1. 发明授权

US08801874B2 Steel plate and steel pipe for line pipes 有权
标题翻译：钢管钢管钢管
公开(公告)号：US08801874B2
公开(公告)日：2014-08-12
申请号：US12741271
申请日：2008-11-07
申请人： Nobuyuki Ishikawa , Makoto Suzuki , Tomohiro Matsushima , Akiyoshi Tsuji , Shinichi Kakihara , Nobuo Shikanai , Yutaka Awajiya
发明人： Nobuyuki Ishikawa , Makoto Suzuki , Tomohiro Matsushima , Akiyoshi Tsuji , Shinichi Kakihara , Nobuo Shikanai , Yutaka Awajiya
IPC分类号： C22C38/00 , C22C38/18 , C22C38/14 , C22C38/12 , F16L9/00
CPC分类号： C22C38/04 , C21D8/0226 , C21D8/0263 , C21D2211/002 , C21D2211/004 , C22C38/002 , C22C38/02 , C22C38/06 , C22C38/12 , C22C38/14
摘要： A steel plate for line pipes containing, in terms of % by weight, C: 0.02 to 0.06%, Si: 0.5% or less, Mn: 0.8 to 1.6%, P: 0.008% or less, S: 0.0008% or less, Al: 0.08% or less, Nb: 0.005 to 0.035%, Ti: 0.005 to 0.025%, and Ca: 0.0005 to 0.0035%, and optionally contains one or more of Cu: 0.5% or less, Ni: 1% or less, Cr: 0.5% or less, Mo: 0.5% or less and V: 0.1% or less, and has a CP value of 0.95 or less represented by CP=4.46C(%)+2.37Mn(%)/6+{1.18Cr(%)+1.95Mo(%)+1.74V(%)}/5+{1.74Cu(%)+1.7Ni(%)}/15+22.36P(%), and a Ceq value of 0.30 or more represented by Ceq=C(%)+Mn(%)/6+{Cr(%)+Mo(%)+V(%)}/5 +{Cu(%)+Ni(%)}/15.
摘要翻译：管道用钢板，以重量％计含有C：0.02〜0.06％，Si：0.5％以下，Mn：0.8〜1.6％，P：0.008％以下，S：0.0008％以下， Al：0.08％以下，Nb：0.005〜0.035％，Ti：0.005〜0.025％，Ca：0.0005〜0.0035％，Cu：0.5％以下，Ni：1％以下， Cr：0.5％以下，Mo：0.5％以下，V：0.1％以下，CP = 4.46℃（％）+ 2.37Mn（％）/ 6+（1.18）表示的CP值为0.95以下 Cr（％）+ 1.95Mo（％）+ 1.74V（％）} / 5+（1.74Cu（％）+ 1.7Ni（％）} / 15 + 22.36P（％），Ceq值为0.30以上由Ceq = C（％）+ Mn（％）/ 6+ {Cr（％）+ Mo（％）+ V（％）} / 5 + {Cu（％）+ Ni（％）} / 15表示。

2. 发明申请

US20120241057A1 LOW YIELD RATIO, HIGH STRENGTH AND HIGH TOUGHNESS STEEL PLATE AND METHOD FOR MANUFACTURING THE SAME 有权
标题翻译：低屈服强度，高强度和高韧性钢板及其制造方法
公开(公告)号：US20120241057A1
公开(公告)日：2012-09-27
申请号：US13499472
申请日：2010-09-28
申请人： Junji Shimamura , Nobuyuki Ishikawa , Nobuo Shikanai
发明人： Junji Shimamura , Nobuyuki Ishikawa , Nobuo Shikanai
IPC分类号： C21D8/02 , C22C38/02 , C22C38/38 , C22C38/04
CPC分类号： C22C38/02 , C21D6/005 , C21D8/0205 , C21D9/46 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C22C38/001 , C22C38/002 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14
摘要： Provided is a low yield ratio, high strength and high toughness steel plate having excellent strain ageing resistance equivalent to API 5L X70 Grade or lower and a method for manufacturing the same. The steel plate has a metallographic microstructure that is a three-phase microstructure consisting of bainite, M-A constituent, and quasi-polygonal ferrite, the area fraction of the bainite being 5% to 70%, the area fraction of the M-A constituent being 3% to 20%, the remainder being the quasi-polygonal ferrite, the equivalent circle diameter of the M-A constituent being 3.0 μm or less. The steel plate has a yield ratio of 85% or less and a Charpy impact test absorbed energy of 200 J or more at −30° C. before or after being subjected to strain ageing treatment at a temperature of 250° C. or lower for 30 minutes or less.
摘要翻译：提供具有优异的耐API 5L X70等级以下的耐老化性的低屈服比，高强度，高韧性的钢板及其制造方法。该钢板具有由贝氏体，MA成分和准多边形铁素体组成的三相组织的金相组织，贝氏体的面积率为5〜70％，MA成分的面积分数为3％至20％，其余为准多边形铁素体，MA成分的当量圆直径为3.0μm以下。在250℃以下的温度下进行应变时效处理之前或之后，钢板的屈服比为85％以下，夏比冲击试验在-30℃下吸收的能量为200J以上， 30分钟以内。

3. 发明申请

US20090274572A1 High-Strength Pearlitic Steel Rail Having Excellent Delayed Fracture Properties 有权
标题翻译：高强度珍珠岩钢轨具有优良的延迟断裂性能
公开(公告)号：US20090274572A1
公开(公告)日：2009-11-05
申请号：US12225104
申请日：2007-03-16
申请人： Minoru Honjo , Tatsumi Kimura , Shinichi Suzuki , Nobuo Shikanai
发明人： Minoru Honjo , Tatsumi Kimura , Shinichi Suzuki , Nobuo Shikanai
IPC分类号： C22C38/28 , C22C38/14 , C22C38/18 , C22C38/16 , C22C38/12 , C22C38/22
CPC分类号： C21D8/00 , C21D9/04 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/14 , C22C38/16 , C22C38/18
摘要： The invention provides a high-strength pearlitic steel rail, which is inexpensive, and has a tensile strength of 1200 MPa or more, and is excellent in delayed fracture properties. Specifically, the rail contains, in mass percent, C of 0.6 to 1.0%, Si of 0.1 to 1.5%, Mn of 0.4 to 2.0%, P of 0.035% or less, S of 0.0005 to 0.010%, and the remainder is Fe and inevitable impurities, wherein tensile strength is 1200 MPa or more, and size of a long side of an A type inclusion is 250 mm or less in at least a cross-section in a longitudinal direction of a rail head, and the number of A type inclusions, each having a size of a long side of 1 mm to 250 mm, is less than 25 per observed area of 1 mm2 in the cross-section in the longitudinal direction of the rail head.
摘要翻译：本发明提供一种廉价的拉伸强度为1200MPa以上的高强度珠光体钢轨，延迟断裂性优异。具体而言，铁素体以质量％计含有C为0.6〜1.0％，Si为0.1〜1.5％，Mn为0.4〜2.0％，P为0.035％以下，S为0.0005〜0.010％，余量为Fe 和不可避免的杂质，拉伸强度为1200MPa以上，A型夹杂物的长边的尺寸至少在轨头的长度方向的截面上为250μm以下，A的数量每个具有1mm至250μm的长边尺寸的夹杂物在轨头的纵向方向上的横截面中小于25个每1mm观察面积。

4. 发明授权

US08765269B2 High strength steel pipe for low-temperature usage having excellent buckling resistance and toughness of welded heat affected zone and method for producing the same 有权
标题翻译：用于低温使用的高强度钢管具有优异的抗弯曲性和焊接热影响区的韧性及其制造方法
公开(公告)号：US08765269B2
公开(公告)日：2014-07-01
申请号：US13147992
申请日：2010-02-05
申请人： Junji Shimamura , Nobuyuki Ishikawa , Mitsuhiro Okatsu , Nobuo Shikanai
发明人： Junji Shimamura , Nobuyuki Ishikawa , Mitsuhiro Okatsu , Nobuo Shikanai
IPC分类号： C22C38/00 , B21B1/38 , B21B3/00 , B21C37/08 , C21D8/02 , C22C38/58 , B23K9/025 , B23K9/23
CPC分类号： B23K9/18 , B21C37/08 , B23K9/0253 , B23K9/23 , B23K35/30 , B23K2101/06 , B23K2103/04 , C21D6/005 , C21D8/0205 , C21D8/0226 , C21D8/0247 , C21D8/10 , C21D8/105 , C21D9/08 , C21D9/50 , C21D2211/002 , C21D2211/008 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14 , Y10T428/12951 , Y10T428/12958 , Y10T428/12965 , Y10T428/12972
摘要： An APIX100-grade high strength steel pipe includes a base material containing, in mass percentage, C: more than 0.03% and 0.08% or less, Si: 0.01% to 0.5%, Mn: 1.5% to 3.0%, P: 0.015% or less, S: 0.005% or less, Al: 0.01% to 0.08%, Nb: 0.005% to 0.025%, Ti: 0.005% to 0.025%, N: 0.001% to 0.010%, O: 0.005% or less, and B: 0.0003% to 0.0020%, further contains one or more of Cu, Ni, Cr, Mo, and V, satisfies 0.19≦Pcm≦0.25, the balance being Fe and unavoidable impurities, and has a TS of 760 to 930 MPa, a uniform elongation of 5% or more, and a YR of 85% or less; the seam weld metal has a specific composition.
摘要翻译： APIX100级高强度钢管包括以质量％计含有C：大于0.03％和0.08％或更少的Si：0.01％至0.5％，Mn：1.5％至3.0％，P：0.015％以下，S：0.005％以下，Al：0.01〜0.08％，Nb：0.005〜0.025％，Ti：0.005〜0.025％，N：0.001〜0.010％，O：0.005％以下， B：0.0003〜0.0020％，进一步含有Cu，Ni，Cr，Mo，V中的一种以上，满足0.19＆nlE; Pcm＆nlE; 0.25，余量为Fe和不可避免的杂质，TS为760〜930MPa ，均匀伸长率为5％以上，YR为85％以下; 缝焊金属具有特定的组成。

5. 发明授权

US07955445B2 Internal high hardness type pearlitic rail with excellent wear resistance and rolling contact fatigue resistance and method for producing same 有权
标题翻译：内部高硬度型珠光体钢轨，具有优异的耐磨性和滚动接触疲劳性及其制造方法
公开(公告)号：US07955445B2
公开(公告)日：2011-06-07
申请号：US12593463
申请日：2008-03-25
申请人： Minoru Honjo , Tatsumi Kimura , Shinichi Suzuki , Kimihiro Nishimura , Shinji Mitao , Nobuo Shikanai
发明人： Minoru Honjo , Tatsumi Kimura , Shinichi Suzuki , Kimihiro Nishimura , Shinji Mitao , Nobuo Shikanai
IPC分类号： C21D8/00 , C21D9/04 , C22C38/18 , C22C38/24 , C22C38/40
CPC分类号： C22C38/02 , B21B1/085 , C21D1/18 , C21D8/00 , C21D9/04 , C21D2211/009 , C22C38/04 , C22C38/18 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/40
摘要： An internal high hardness type pearlitic rail that has a composition containing 0.73% to 0.85% by mass C, 0.5% to 0.75% by mass Si, 0.3% to 1.0% by mass Mn, 0.035% by mass or less P, 0.0005% to 0.012% by mass S, 0.2% to 1.3% by mass Cr, and the balance being Fe and incidental impurities, in which the value of [% Mn]/[% Cr] is greater than or equal to 0.3 and less than 1.0, where [% Mn] represents the Mn content, and [% Cr] represents the Cr content, and in which the internal hardness of a rail head that is defined by the Vickers hardness of a portion located from a surface layer of the rail head to a depth of at least 25 mm is greater than or equal to 380 Hv and less than 480 Hv.
摘要翻译：具有C含量为0.73〜0.85质量％，Si：0.5〜0.75质量％，Mn：0.3〜1.0质量％，P：0.035质量％以下的组合物的内部高硬度型珠光体钢，0.0005〜 0.012质量％的S，0.2〜1.3质量％的Cr，余量为[Mn] / [Cr]值大于或等于0.3且小于1.0的Fe和附带的杂质，其中[％Mn]表示Mn含量，[％Cr]表示Cr含量，其中轨头的内部硬度由位于轨头的表面层的部分的维氏硬度定义为至少25mm的深度大于或等于380Hv且小于480Hv。

6. 发明申请

US20100186857A1 INTERNAL HIGH HARDNESS TYPE PEARLITIC RAIL WITH EXCELLENT WEAR RESISTANCE, ROLLING CONTACT FATIGUE RESISTANCE, AND DELAYED FRACTURE PROPERTY AND METHOD FOR PRODUCING SAME 审中-公开
标题翻译：具有优异耐磨性，滚动接触疲劳耐久性和延迟断裂性能的内部高硬度型PEARLIILILIL及其生产方法
公开(公告)号：US20100186857A1
公开(公告)日：2010-07-29
申请号：US12663866
申请日：2008-03-25
申请人： Minoru Honjo , Tatsumi Kimura , Shinichi Suzuki , Kimihiro Nishimura , Nobuo Shikanai
发明人： Minoru Honjo , Tatsumi Kimura , Shinichi Suzuki , Kimihiro Nishimura , Nobuo Shikanai
IPC分类号： C21D9/04 , C22C38/18 , C22C38/20 , C22C38/22
CPC分类号： C22C38/02 , B21B1/085 , C21D1/02 , C21D6/00 , C21D6/002 , C21D6/005 , C21D8/005 , C21D9/04 , C21D2211/009 , C21D2221/00 , C21D2221/02 , C22C38/001 , C22C38/04 , C22C38/24
摘要： An internal high hardness type pearlitic rail has a composition containing 0.73% to 0.85% by mass C, 0.5% to 0.75% by mass Si, 0.3% to 1.0% by mass Mn, 0.035% by mass or less P, 0.0005% to 0.012% by mass S, 0.2% to 1.3% by mass Cr, 0.005% to 0.12% by mass V, 0.0015% to 0.0060% by mass N, and the balance being Fe and incidental impurities, wherein the value of [% Mn]/[% Cr] is greater than or equal to 0.3 and less than 1.0, where [% Mn] represents the Mn content, and [% Cr] represents the Cr content, and the value of [% V]/[% N] is in the range of 8.0 to 30.0, where [% V] represents the V content, and [% N] represents the N content, and wherein the internal hardness of a rail head is defined by the Vickers hardness of a portion located from a surface layer of the rail head to a depth of at least 25 mm and is greater than or equal to 380 Hv and less than 480 Hv.
摘要翻译：内部高硬度型珠光体钢轨具有C：0.73〜0.85质量％，Si：0.5〜0.75质量％，Mn：0.3〜1.0质量％，P：0.035质量％以下，P：0.0005〜0.012 质量％S，0.2〜1.3质量％的Cr，0.005〜0.12质量％的V，0.0015〜0.0060质量％的N，余量为Fe和附带的杂质，其中[Mn] / [％Cr]大于或等于0.3且小于1.0，其中[％Mn]表示Mn含量，[％Cr]表示Cr含量，[％V] / [％N]的值为在8.0至30.0的范围内，其中[％V]表示V含量，[％N]表示N含量，并且其中轨头的内部硬度由位于表面的部分的维氏硬度轨头的层至少25mm的深度并且大于或等于380Hv且小于480Hv。

7. 发明申请

US20100147424A1 ABRASION-RESISTANT STEEL EXCELLENT IN FORMABILITY AND PRODUCTION METHOD THEREOF 审中-公开
标题翻译：耐腐蚀性优良的钢和其生产方法
公开(公告)号：US20100147424A1
公开(公告)日：2010-06-17
申请号：US12600891
申请日：2008-05-26
申请人： Yasuhiro Murota , Misao Ishikawa , Yoshinori Watanabe , Shinichi Suzuki , Nobuo Shikanai
发明人： Yasuhiro Murota , Misao Ishikawa , Yoshinori Watanabe , Shinichi Suzuki , Nobuo Shikanai
IPC分类号： C21D8/00 , C22C38/16 , C22C38/12 , C22C38/00 , C22C38/32
CPC分类号： C22C38/22 , C21D1/06 , C21D8/0226 , C21D8/0263 , C21D2211/004 , C21D2211/005 , C21D2211/009 , C22C38/02 , C22C38/04 , C22C38/14 , C22C38/28
摘要： An abrasion resistant steel excellent in bending formability and suitable for members, e.g., power shovels, which come into contact with earth and sand, and a production method thereof are provided. Specifically, the steel contains, on a percent by mass basis, 0.05% to 0.35% of C, 0.05% to 1.0% of Si, 0.1% to 2.0% of Mn, 0.1% to 1.2% of Ti, 0.1% or less of Al, at least one element of 0.1% to 1.0% of Cu, 0.1% to 2.0% of Ni, 0.1% to 1.0% of Cr, 0.05% to 1.0% of Mo, 0.05% to 1.0% of W, and 0.0003% to 0.0030% of B, if necessary at least one element of 0.005% to 1.0% of Nb and 0.005% to 1.0% of V, and the remainder including Fe and incidental impurities, where DI* represented by the following formula is less than 60: DI*=33.85×(0.1×C*)0.5×(0.7×Si+1)×(3.33×Mn+1)×(0.35×Cu+1)×(0.36×Ni+1)×(2.16×Cr+1)×(3×Mo*+1)×(1.5×W*+1) (1) where C*=C−1/4×(Ti−48/14N), Mo*=Mo×(1−0.5×(Ti−48/14N)), and W*=W×(1−0.5×(Ti−48/14N)).
摘要翻译：提供了弯曲成型性优异且适用于与土砂接触的构件（例如铲土机）的耐磨钢及其制造方法。具体而言，以质量％计含有C：0.05〜0.35％，Si：0.05〜1.0％，Mn：0.1〜2.0％，Ti：0.1〜1.2％，0.1％ Al中，Cu：0.1〜1.0％，Ni：0.1〜2.0％，Cr：0.1〜1.0％，Mo：0.05〜1.0％，W：0.05〜1.0％至0.0030％的B，如有必要，至少一种元素为Nb的0.005％至1.0％，V为0.005％至1.0％，其余为Fe和杂质，其中由下式表示的DI *小于60 ：DI * = 33.85×（0.1×C *）0.5×（0.7×Si + 1）×（3.33×Mn + 1）×（0.35×Cu + 1）×（0.36×Ni + 1）×（2.16×Cr +1）×（3×Mo * + 1）×（1.5×W * + 1）（1）其中C * = C-1/4×（Ti-48 / 14N），Mo * = Mo×（1- 0.5×（Ti-48 / 14N）），W * = W×（1-0.5×（Ti-48 / 14N））。

8. 发明授权

US08926766B2 Low yield ratio, high strength and high uniform elongation steel plate and method for manufacturing the same 有权
标题翻译：低屈服比，高强度和高均匀伸长率钢板及其制造方法
公开(公告)号：US08926766B2
公开(公告)日：2015-01-06
申请号：US13499455
申请日：2010-09-28
申请人： Junji Shimamura , Nobuyuki Ishikawa , Nobuo Shikanai
发明人： Junji Shimamura , Nobuyuki Ishikawa , Nobuo Shikanai
IPC分类号： C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14 , C21D8/02
CPC分类号： C21D8/0226 , C21D8/0263 , C21D2211/002 , C21D2211/008 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/18
摘要： Provided is a low yield ratio, high strength and high uniform elongation steel plate having excellent strain ageing resistance equivalent to API 5L X70 Grade or lower and a method for manufacturing the same. In particular, the steel plate contains 0.06% to 0.12% C, 0.01% to 1.0% Si, 1.2% to 3.0% Mn, 0.015% or less P, 0.005% or less S, 0.08% or less Al, 0.005% to 0.07% Nb, 0.005% to 0.025% Ti, 0.010% or less N, and 0.005% or less O on a mass basis, the remainder being Fe and unavoidable impurities. The low yield ratio, high strength and high uniform elongation steel plate has a metallographic microstructure that is a two-phase microstructure consisting of bainite and M-A constituent, the area fraction of the M-A constituent being 3% to 20%, the equivalent circle diameter of the M-A constituent being 3.0 μm or less.
摘要翻译：提供具有相当于API 5L X70等级或更低等级的优异应变耐老化性的低屈服比，高强度和高均匀伸长率钢板及其制造方法。特别是钢板含有0.06〜0.12％的Si，0.01〜1.0％的Si，1.2〜3.0％的Mn，0.015％以下的P，0.005％以下的S，0.08％以下的Al，0.005〜0.07 ％Nb，0.005％〜0.025％Ti，0.010％以下N，0.005％以下O，余量为Fe和不可避免的杂质。低屈服比，高强度和高均匀伸长率钢板具有由贝氏体和MA组分组成的两相微结构的金相组织，MA成分的面积分数为3％〜20％，当量圆直径为 MA成分为3.0μm以下。

9. 发明授权

US08361382B2 High-strength pearlitic steel rail having excellent delayed fracture properties 有权
$High-strength pearlitic steel rail having excellent delayed fracture properties$
标题翻译：高强度珠光体钢轨具有优异的延迟断裂性能
公开(公告)号：US08361382B2
公开(公告)日：2013-01-29
申请号：US13299678
申请日：2011-11-18
申请人： Minoru Honjo , Tatsumi Kimura , Shinichi Suzuki , Nobuo Shikanai
发明人： Minoru Honjo , Tatsumi Kimura , Shinichi Suzuki , Nobuo Shikanai
IPC分类号： C22C38/60 , C22C38/18 , C22C38/12
CPC分类号： C21D8/00 , C21D9/04 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/14 , C22C38/16 , C22C38/18
摘要： A steel rail including a composition of, in mass percent, C of 0.6% to 1.0%, Si of 0.1% to 1.5%, Mn of 0.4% to 2.0%, P of 0.035% or less, S of 0.010% or less, Ca of 0.0010% to 0.010%, and the remainder being Fe and inevitable impurities, wherein the tensile strength is 1200 MPa or more, and the size of a long side of a C type inclusion is 50 μm or less in at least a cross-section in a longitudinal direction of a rail head, and the number of Ca type inclusions, each having a size of a long side of 1 μm to 50 μm, is 0.2 to 10 per observed area of 1 mm2 in the cross-section in the longitudinal direction of the rail head.
摘要翻译：一种钢轨，其以质量％计含有0.6％-1.0％的C，0.1％-1.5％的Si，0.4％到2.0％的Mn，0.035％以下的P，0.010％以下的S， Ca为0.0010％〜0.010％，余量为Fe和不可避免的杂质，其中拉伸强度为1200MPa以上，C型夹杂物的长边的尺寸至少为截面积为50μm以下，轨头长度方向的截面积和长度方向为1μm〜50μm的Ca型夹杂物的数量，在截面的截面中为0.2mm〜10mm，轨头的纵向。

10. 发明授权

US5393358A Method for producing abrasion-resistant steel having excellent surface property 失效
标题翻译：具有优异表面性能的耐磨钢的制造方法
公开(公告)号：US5393358A
公开(公告)日：1995-02-28
申请号：US98609
申请日：1993-07-28
申请人： Nobuo Shikanai , Tetsuya Sanpei , Kazunori Yako , Kenji Hirabe , Yasunobu Kunisada
发明人： Nobuo Shikanai , Tetsuya Sanpei , Kazunori Yako , Kenji Hirabe , Yasunobu Kunisada
IPC分类号： C21D1/02 , C21D8/02
CPC分类号： C21D1/02 , C21D8/021 , C21D2211/004 , C21D8/0226
摘要： An abrasion-resistant steel having excellent surface property consists essentially of 0.1 to 0.45 wt. % C, 0.1 to 1 wt. % Si, 0.1 to 2 wt. % Mn, 0.04 wt. % or less P, 0.04 wt. % or less S, 0.1 to 1 wt. % Ti, 0.0015 to 0.01 wt. % N, and the balance being Fe and inevitable impurities, the steel including at least 400 TiC precipitates of 0.5 .mu.m or more in particle size per 1 mm.sup.2 and the steel having Ti* of 0.05 wt. % or more and less than 0.4 wt. % the Ti* being defined by the equations of Ti*=Ti(a)-[Ti], Ti(a)=Ti-{(48/14)N+(48/32)S}, log[Ti][C]=(-10580/T)+4.38, [Ti]=4.times.[C]+{Ti(a) -4.times.C}.A method for producing an abrasion-resistant steel having excellent surface property comprising the steps of: preparing a molten steel having the composition specified above; casting continuously the molten steel to produce slab, coarse particles of TiC being precipitated in the slab; hot-working the slab to produce a hot-rolled steel sheet at 1300.degree. C. or less; and quenching the hot-rolled steel sheet.
摘要翻译：具有优异表面性能的耐磨钢基本上由0.1〜0.45重量％％C，0.1〜1wt。％Si，0.1〜2重量％％Mn，0.04wt。％以下P，0.04wt。％以下S，0.1〜1重量％％Ti，0.0015〜0.01重量％％N，余量为Fe和不可避免的杂质，该钢包含至少400个TiCl析出物，每1mm 2的粒径为0.5μm以上，Ti *为0.05wt％％以上且小于0.4重量％ Ti * = Ti（a） - [Ti]，Ti（a）= Ti - {（48/14）N +（48/32）S}，log [Ti] [C ] =（ - 10580 / T）+4.38，[Ti] = 4x [C] + {Ti（a）-4xC}。一种具有优异表面性能的耐磨钢的制造方法，包括以下步骤：制备具有上述组成的钢水; 连续浇铸钢水以生产板坯，TiC的粗颗粒在板坯中沉淀; 热轧板坯以在1300℃以下生产热轧钢板; 并对该热轧钢板进行淬火。

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