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公开(公告)号：US06737019B2
公开(公告)日：2004-05-18
申请号：US10142091
申请日：2002-05-09
IPC分类号： C22C3860
CPC分类号： C22C38/04 , C22C38/002 , C22C38/12 , C22C38/60
摘要： A high-sulfur free-cutting steel which has a chemical composition containing, in mass %, 0.03 to 0.20% C, 0.35% or less Si (including 0%), 0.30 to 2.00% Mn, 0.01 to 0.15% P, 0.35 to 0.65% S 0.0100 to 0.0250% O, 0.020% or less N, 0.005% or less Al (including 0%), 0.02 to 0.20% Nb, and further containing 0.05 to 0.50% V or 0.02 to 0.20% Ti, or both, with the remainder consisting of Fe and unavoidable impurities, wherein sulfide type inclusions, as the principal nonmetallic inclusions contained in the steel, have a mean size of 50 &mgr;m2 or less and are present at the rate of 500 to 1000 inclusions per mm2 in the cross section of the steel. The sulfur-containing free-cutting steel has a good machinability comparable or superior to that of free-cutting steels containing heavy metals which have a deleterious effect on the environment, without requiring the addition of such undesirable heavy metals.
摘要翻译： 一种高硫自由切削钢，其具有以质量％计含有0.03〜0.20％C，0.35％以下的Si（含0％），0.30〜2.00％Mn，0.01〜0.15％P，0.35〜 0.65％S 0.0100〜0.0250％O，0.020％以下N，0.005％以下Al（含0％），0.02〜0.20％Nb，进一步含有0.05〜0.50％V或0.02〜0.20％Ti， 剩余部分由Fe和不可避免的杂质构成，其中作为钢中所含的主要非金属夹杂物的硫化物型夹杂物的平均粒径为50μm2以下，以每毫米500〜1000个夹杂物的速度存在 <2>在钢的横截面。 含硫自由切削钢具有与含有对环境有害影响的重金属的自由切削钢相当或优于不需要加入这种不需要的重金属的机械加工性能。
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公开(公告)号：US07014812B2
公开(公告)日：2006-03-21
申请号：US10280346
申请日：2002-10-25
IPC分类号： C22C38/60
CPC分类号： C22C38/60 , C22C38/002 , C22C38/04 , C22C38/12
摘要： A sulfur-containing free-cutting steel for machine structural use, containing, in weight percent, 0.10 to 0.55% of C, 0.05 to 1.00% of Si, 0.30 to 2.50% of Mn, not more than 0.15% of P, 0.050 to 0.350% of S, more than 0.010% but not more than 0.020% of Al, 0.015 to 0.200% of Nb, 0.0015 to 0.0150% of O, and not more than 0.02% of N, and further containing, in weight percent, at least one selected from the group consisting of 0.03 to 0.50% of V, 0.02 to 0.20% of Ti and 0.01 to 0.20% of Zr, wherein the ratio S/O of the S content to the O content is 15 to 120, and at least one selected from the group consisting of an oxide, a carbide, a nitride and a carbonitride of Nb(see FIG. 1) acts as nuclei for precipitation of MnS type inclusions. A sulfur-containing free-cutting steel for machine structural use is obtained by adjusting the chemical composition of steel and provides a sulfur free-cutting steel that does not contain lead but has a machinability and mechanical properties on a par with conventional lead-containing free-cutting steel.
摘要翻译： 一种用于机械结构用的含硫自由切削钢，其重量百分比含有C：0.10〜0.55％，Si：0.05〜1.00％，Mn：0.30〜2.50％，P：0.15％以下，0.050〜 S的0.350％，Al的0.010％以上且0.020％以下，Nb：0.015〜0.200％，O：0.0015〜0.0150％，N：0.02以下，进一步含有 至少一种选自V，0.03〜0.50％，0.02〜0.20％Ti和0.01〜0.20％Zr，其中S含量与O含量之比S / O为15〜120， 选自Nb（参见图1）的氧化物，碳化物，氮化物和碳氮化物的至少一种作为析出MnS型夹杂物的核。 通过调整钢的化学成分得到一种用于机械结构用途的含硫自由切削钢，并提供一种不含铅的硫自由切削钢，但具有与常规含铅自由基相同的机械加工性和机械性能 切钢。
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公开(公告)号：US5518685A
公开(公告)日：1996-05-21
申请号：US397554
申请日：1995-03-02
申请人： Kazuo Sakamoto , Tatsuo Fukuzumi , Hideo Ueno
发明人： Kazuo Sakamoto , Tatsuo Fukuzumi , Hideo Ueno
CPC分类号： C22C38/46 , C22C38/001 , C22C38/44 , C22C38/48
摘要： A steel for darburized gear having softening resistance, consisting essentially of, in weight percentages, 0.18 to 0.25% C, 0.45 to 1.00% Si, 0.40 to 0.70% Mn, 0.30 to 0.70% Ni, 1.00 to 1.50% Cr, 0.30 to 0.70% Mo, up to 0.50% Cu, 0.015 to 0.030% A1, 0.03 to 0.30% V, 0.010 to 0.030% Nb, up to 0.0015% O, 0.0100 to 0.0200% N and the balance consisting of Fe and inevitable impurity elements, wherein quenching at 820.degree. C. or higher after carburization does not cause any ferrite to be formed in a hardened structure of the core part of the carburized steel, and wherein, while tempering is generally performed at 160.degree. to 180.degree. C. after the quenching, reheating at any of temperatures inclusive of the tempering temperature and up to 300.degree. C. does not cause the hardness of a carburized case of the carburized steel to decrease by HV 50 or more from the one after the carburization, quenching and tempering.
摘要翻译： 用于具有耐软化性的脱碳齿轮用钢，其重量百分比基本上由0.18至0.25％C，0.45至1.00％的Si，0.40至0.70％的Mn，0.30至0.70％的Ni，1.00至1.50％的Cr，0.30至0.70 ％Mo，至多0.50％的Cu，0.015〜0.030％的Al，0.03〜0.30％的V，0.010〜0.030％的Nb，至多0.0015％的O，0.0100〜0.0200％的N，余量由Fe和不可避免的杂质元素组成，其中 在渗碳后在820℃以上的淬火不会在渗碳钢的芯部的硬化结构中形成铁素体，并且在淬火后通常在160〜180℃进行回火 在包含回火温度和高达300℃的任何温度下进行再加热，不会导致渗碳钢的渗碳的硬度比渗碳，淬火回火后的HV 50以上降低HV 50以上。
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公开(公告)号：US08337642B2
公开(公告)日：2012-12-25
申请号：US13456317
申请日：2012-04-26
申请人： Tatsuo Fukuzumi , Hidenori Hiromatsu , Motoyuki Sato , Ryo Hara
发明人： Tatsuo Fukuzumi , Hidenori Hiromatsu , Motoyuki Sato , Ryo Hara
CPC分类号： C22C38/32
摘要： The present invention provides a spring steel that has superior hardenability, undergoes less pitting in a corrosive environment, and can achieve higher stress and toughness. More specifically, the present invention provides a high-strength and high-toughness spring steel with improved hardenability and pitting resistance, containing, in mass percent, 0.40 to 0.70% carbon, 0.05 to 0.50% silicon, 0.60 to 1.00% manganese, 1.00 to 2.00% chromium, 0.010 to 0.050% niobium, 0.005 to 0.050% aluminum, 0.0045 to 0.0100% nitrogen, 0.005 to 0.050% titanium, 0.0005 to 0.0060% boron, no more than 0.015% phosphorus and no more than 0.010% sulfur, the remainder being composed of iron and unavoidable impurities, the steel having a tensile strength of at least 1700 MPa in 400° C. tempering after quenching and a Charpy impact value of at least 40 J/cm2 for a 2 mm U-notched test piece of JIS Z 2202 and the parameter Fce being at least 1.70.
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公开(公告)号：US5183634A
公开(公告)日：1993-02-02
申请号：US805202
申请日：1991-12-09
申请人： Tsuyoshi Abe , Nobumasa Umezawa , Tatsuo Fukuzumi , Katsuyuki Uchibori , Junji Ozaki , Hiroharu Motomura
发明人： Tsuyoshi Abe , Nobumasa Umezawa , Tatsuo Fukuzumi , Katsuyuki Uchibori , Junji Ozaki , Hiroharu Motomura
CPC分类号： C22C38/24 , C22C38/26 , Y10S148/908
摘要： Disclosed is a high strength spring steel consisting of, in weight percentage, 0.50 to 0.70% C, 1.00 to 2.50% Si, 0.30 to 1.20% Mn, 0.80 to less than 1.20% Cr, 0.05 to 0.3% Mo, 0.05 to 0.30% V, 0.01 to 0.30% Nb, 0.005 to 0.100% Al and the balance being Fe and unavoidable impurities. The steel of the present invention has a high hardness coupled with high toughness and is very useful, especially for springs used in suspension devices or other various industrial machines.
摘要翻译： 公开了一种高强度弹簧钢，其重量百分比为C：0.50-0.70％，Si：1.00〜2.50％，Mn：0.30〜1.20％，Cr：0.80〜1.20％，Mo：0.05〜0.3％，Mo：0.05〜0.30％ V，0.01〜0.30％Nb，0.005〜0.100％Al，余量为Fe和不可避免的杂质。 本发明的钢具有高韧性和高韧性，并且是非常有用的，特别是用于悬挂装置或其它各种工业机械中的弹簧。
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公开(公告)号：US5118469A
公开(公告)日：1992-06-02
申请号：US720722
申请日：1991-06-25
CPC分类号： C22C38/46 , C22C38/48 , Y10S148/908
摘要： Disclosed is a high strength spring steel consisting of, in weight percentage, 0.40 to 0.70% C, 0.50 to 2.00% Si, more than 0.50 to 1.50% Mn, 0.50 to 2.50% Ni, 0.20 to 1.50% Cr, more than 0.60 to 1.50% Mo, 0.01 to 0.50% V, 0.01 to 0.50% Nb, 0.005 to 0.100% Al and the balance being Fe and unavoidable impurities. The steel of the present invention has a high hardness coupled with high toughness and is very useful especially for springs used in suspension devices or other various industrial machines.
摘要翻译： 公开了一种高强度弹簧钢，其重量百分比为0.40-0.70％，Si：0.50〜2.00％，Mn：0.50〜1.50％，Ni：0.50〜2.50％，Cr：0.20〜1.50％，Cr：0.60〜 1.50％Mo，0.01〜0.50％V，0.01〜0.50％Nb，0.005〜0.100％Al，余量为Fe和不可避免的杂质。 本发明的钢具有高韧性和高韧性，对于悬挂装置或其他各种工业机械中使用的弹簧来说是非常有用的。
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公开(公告)号：US08197614B2
公开(公告)日：2012-06-12
申请号：US12925628
申请日：2010-10-26
申请人： Tatsuo Fukuzumi , Hidenori Hiromatsu , Motoyuki Sato , Ryo Hara
发明人： Tatsuo Fukuzumi , Hidenori Hiromatsu , Motoyuki Sato , Ryo Hara
CPC分类号： C22C38/32
摘要： The present invention provides a spring steel that has superior hardenability, undergoes less pitting in a corrosive environment, and can achieve higher stress and toughness. More specifically, the present invention provides a high-strength and high-toughness spring steel with improved hardenability and pitting resistance, containing, in mass percent, 0.40 to 0.70% carbon, 0.05 to 0.50% silicon, 0.60 to 1.00% manganese, 1.00 to 2.00% chromium, 0.010 to 0.050% niobium, 0.005 to 0.050% aluminum, 0.0045 to 0.0100% nitrogen, 0.005 to 0.050% titanium, 0.0005 to 0.0060% boron, no more than 0.015% phosphorus and no more than 0.010% sulfur, the remainder being composed of iron and unavoidable impurities, the steel having a tensile strength of at least 1700 MPa in 400° C. tempering after quenching and a Charpy impact value of at least 40 J/cm2 for a 2 mm U-notched test piece of JIS Z 2202 and the parameter Fce being at least 1.70.
摘要翻译： 本发明提供一种具有优异的淬透性的弹簧钢，在腐蚀性环境中的点蚀较少，可以获得更高的应力和韧性。 更具体地说，本发明提供了一种具有改善的淬透性和耐点蚀性的高强度和高韧性弹簧钢，其质量百分比含有0.40至0.70％的碳，0.05至0.50％的硅，0.60至1.00％的锰，1.00至 0.00％铬，0.010-0.050％铌，0.005-0.050％铝，0.0045-0.0100％氮，0.005-0.050％钛，0.0005-0.0060％硼，不超过0.015％磷和不超过0.010％硫，其余 由铁和不可避免的杂质构成，钢在淬火后400℃回火时的拉伸强度为至少1700MPa，JIS的2mm U形缺口试验片的夏比冲击值至少为40J / cm 2 Z 2202，参数Fce至少为1.70。
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公开(公告)号：US07850794B2
公开(公告)日：2010-12-14
申请号：US10515134
申请日：2003-11-13
申请人： Tatsuo Fukuzumi , Hidenori Hiromatsu , Motoyuki Sato , Ryo Hara
发明人： Tatsuo Fukuzumi , Hidenori Hiromatsu , Motoyuki Sato , Ryo Hara
CPC分类号： C22C38/32
摘要： The present invention provides a spring steel that has superior hardenability, undergoes less pitting in a corrosive environment, and can achieve higher stress and toughness. More specifically, the present invention provides a high-strength and high-toughness spring steel with improved hardenability and pitting resistance, containing, in mass percent, 0.40 to 0.70% carbon, 0.05 to 0.50% silicon, 0.60 to 1.00% manganese, 1.00 to 2.00% chromium, 0.010 to 0.050% niobium, 0.005 to 0.050% aluminum, 0.0045 to 0.0100% nitrogen, 0.005 to 0.050% titanium, 0.0005 to 0.0060% boron, no more than 0.015% phosphorus and no more than 0.010% sulfur, the remainder being composed of iron and unavoidable impurities, the steel having a tensile strength of at least 1700 MPa in 400° C. tempering after quenching and a Charpy impact value of at least 40 J/cm2 for a 2 mm U-notched test piece of JIS 2202 and the parameter Fce being at least 1.70.
摘要翻译： 本发明提供一种具有优异的淬透性的弹簧钢，在腐蚀性环境中的点蚀较少，可以获得更高的应力和韧性。 更具体地说，本发明提供了一种具有改善的淬透性和耐点蚀性的高强度和高韧性弹簧钢，其质量百分比含有0.40至0.70％的碳，0.05至0.50％的硅，0.60至1.00％的锰，1.00至 0.00％铬，0.010-0.050％铌，0.005-0.050％铝，0.0045-0.0100％氮，0.005-0.050％钛，0.0005-0.0060％硼，不超过0.015％磷和不超过0.010％硫，其余 由铁和不可避免的杂质构成，钢在淬火后400℃回火时的拉伸强度为至少1700MPa，JIS的2mm U形缺口试验片的夏比冲击值至少为40J / cm 2 2202，参数Fce至少为1.70。
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公开(公告)号：US20110041962A1
公开(公告)日：2011-02-24
申请号：US12925628
申请日：2010-10-26
申请人： Tatsuo Fukuzumi , Hidenori Hiromatsu , Motoyuki Sato , Ryo Hara
发明人： Tatsuo Fukuzumi , Hidenori Hiromatsu , Motoyuki Sato , Ryo Hara
IPC分类号： C22C38/26
CPC分类号： C22C38/32
摘要： The present invention provides a spring steel that has superior hardenability, undergoes less pitting in a corrosive environment, and can achieve higher stress and toughness. More specifically, the present invention provides a high-strength and high-toughness spring steel with improved hardenability and pitting resistance, containing, in mass percent, 0.40 to 0.70% carbon, 0.05 to 0.50% silicon, 0.60 to 1.00% manganese, 1.00 to 2.00% chromium, 0.010 to 0.050% niobium, 0.005 to 0.050% aluminum, 0.0045 to 0.0100% nitrogen, 0.005 to 0.050% titanium, 0.0005 to 0.0060% boron, no more than 0.015% phosphorus and no more than 0.010% sulfur, the remainder being composed of iron and unavoidable impurities, the steel having a tensile strength of at least 1700 MPa in 400° C. tempering after quenching and a Charpy impact value of at least 40 J/cm2 for a 2 mm U-notched test piece of JIS Z 2202 and the parameter Fce being at least 1.70.
摘要翻译： 本发明提供一种具有优异的淬透性的弹簧钢，在腐蚀性环境中的点蚀较少，可以获得更高的应力和韧性。 更具体地说，本发明提供了一种具有改善的淬透性和耐点蚀性的高强度和高韧性弹簧钢，其质量百分比含有0.40至0.70％的碳，0.05至0.50％的硅，0.60至1.00％的锰，1.00至 0.00％铬，0.010-0.050％铌，0.005-0.050％铝，0.0045-0.0100％氮，0.005-0.050％钛，0.0005-0.0060％硼，不超过0.015％磷和不超过0.010％硫，其余 由铁和不可避免的杂质构成，钢在淬火后400℃回火时的拉伸强度为至少1700MPa，JIS的2mm U形缺口试验片的夏比冲击值至少为40J / cm 2 Z 2202，参数Fce至少为1.70。
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10.发明申请公开(公告)号：US20050217766A1
公开(公告)日：2005-10-06
申请号：US10515134
申请日：2003-11-13
申请人： Tatsuo Fukuzumi , Hidenori Hiromatsu , Motoyuki Sato , Ryo Hara
发明人： Tatsuo Fukuzumi , Hidenori Hiromatsu , Motoyuki Sato , Ryo Hara
CPC分类号： C22C38/32
摘要： The present invention provides a spring steel that has superior hardenability, undergoes less pitting in a corrosive environment, and can achieve higher stress and toughness. More specifically, the present invention provides a high-strength and high-toughness spring steel with improved hardenability and pitting resistance, comprising, in mass percent, 0.40 to 0.70% carbon, 0.05 to 0.50% silicon, 0.60 to 1.00% manganese, 1.00 to 2.00% chromium, 0.010 to 0.050% niobium, 0.005 to 0.050% aluminum, 0.0045 to 0.0100% nitrogen, 0.005 to 0.050% titanium, 0.0005 to 0.0060% boron, no more than 0.015% phosphorus and no more than 0.010% sulfur, the remainder being composed of iron and unavoidable impurities, the steel having a tensile strength of at least 1700 MPa in 400° C. tempering after quenching and a Charpy impact value of at least 40 J/cm2 for a 2 mm U-notched test piece of JIS No. 3 and the parameter Fce being at least 1.70.
摘要翻译： 本发明提供一种具有优异的淬透性的弹簧钢，在腐蚀性环境中的点蚀较少，可以获得更高的应力和韧性。 更具体地说，本发明提供了一种具有改善的淬透性和耐点蚀性的高强度和高韧性弹簧钢，其质量百分比含有0.40-0.70％的碳，0.05-0.50％的硅，0.60到1.00％的锰，1.00到 0.00％铬，0.010-0.050％铌，0.005-0.050％铝，0.0045-0.0100％氮，0.005-0.050％钛，0.0005-0.0060％硼，不超过0.015％磷和不超过0.010％硫，其余 由铁和不可避免的杂质组成，钢在淬火后在400℃回火时的拉伸强度至少为1700MPa，对于2的钢，冲击值至少为40J / cm 2以上 mm U型缺口试验片，参数Fce为1.70以上。
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