专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

11. 发明专利

JP2005350736A High-strength steel having superior corrosion resistance and fatigue characteristics for spring, and manufacturing method therefor 有权
标题翻译：具有优异耐腐蚀性和耐疲劳特性的高强度钢，及其制造方法
公开(公告)号：JP2005350736A
公开(公告)日：2005-12-22
申请号：JP2004173421
申请日：2004-06-11
申请人： Jfe Bars & Shapes Corp , Jfe条鋼株式会社
发明人： SHIRAGAMI TETSUO , KIKUCHI KATSUHIKO
IPC分类号： C21D9/02 , C22C38/00 , C22C38/60
CPC分类号： Y02P10/212
摘要： PROBLEM TO BE SOLVED: To provide a high-strength steel for a spring, which is manufactured by using mainly scrap for a raw material, and has superior corrosion resistance and fatigue characteristics; and a manufacturing method therefor. SOLUTION: This high-strength steel comprises, by mass%, 0.45-0.7% C, 0.15-2.5% Si, 0.3-1% Mn, 0.015% or less P, 0.015% or less S, 0.3-2% Cu, 0.01-0.1% sol.Al, 0.1% to less than 0.5% Cr, 0.005-0.1% Ti, 0.1% or less Sn+Sb+As while satisfying (Sn+Sb+As)/Cu 2 +535*(([%Sn]+[%Sb]+[%As])/[%Cu])}, while [%Sn], [%Sb], [%As] and [%Cu] represent mass%; hot-rolling it; and then quenching and tempering it. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种用于主要使用废料作原料制造的弹簧用高强度钢，并且具有优异的耐腐蚀性和疲劳特性; 及其制造方法。解决方案：该高强度钢以质量％计含有0.45-0.7％的C，0.15-2.5％的Si，0.3-1％的Mn，0.015％或更少的P，0.015％或更少的S，0.3-2％ Cu，0.01-0.1％sol.Al，0.1％至小于0.5％Cr，0.005-0.1％Ti，0.1％或更少Sn + Sb + As，同时满足（Sn + Sb + As）/ Cu <0.05，一个或 Ni，Mo，V和Nb中的元素较多，Ceq≥0.90％，余量为不可避免的杂质。制造方法包括：在满足950≤T 2 +535 *（（[％Sn] + [％Sb] + [％As]）/ [％Cu]）} ，[％As]和[％Cu]表示质量％; 热轧然后淬火回火。版权所有（C）2006，JPO＆NCIPI

12. 发明专利

JP2014219305A 円形断面試料採取装置および円形断面試料採取方法审中-公开
标题翻译：用于采集具有圆形横截面的样品的装置和方法
公开(公告)号：JP2014219305A
公开(公告)日：2014-11-20
申请号：JP2013099242
申请日：2013-05-09
申请人： Jfe条鋼株式会社 , Jfe Bars & Shapes Corp , Jfeメカニカル株式会社 , Jfe Mechanical Co Ltd
发明人： SUZUKI KEIJI , SUZUKI SEIICHIRO , ENDO GENJIRO , TSUKAMOTO HIROSHI , SATO HIDE , MIURA TAKAO
IPC分类号： G01N1/08 , G01N1/28
CPC分类号： G01N1/08 , G01N1/28
摘要：【課題】円形断面試料採取装置および試料採取方法を提供する。【解決手段】軸心が水平方向の出力軸を回転させる駆動部と、前記出力軸に脱着可能にとりつけられた、内径が円形断面試料の略外径で、全長が少なくとも前記円形断面試料の全長のコアドリルと、供試体を前記円形断面試料の採取位置が前記コアドリルに相対するように位置決めする位置決め機構と、前記駆動部を前記出力軸方向に移動させる移動機構と、前記位置決め機構と前記移動機構を備えた本体を有し、前記本体で、前記コアドリルが挿通する孔部を有する板状部材が、前記位置決め機構と前記駆動機構との間で、前記供試体から前記円形断面試料を採取する際、採取開始から採取終了までの間、前記出力軸に取り付けたコアドリルと前記出力軸の軸中心が一致して回転可能となる位置に、前記出力軸に対して垂直に取り付けられている装置。切り屑を排出させるため、コアドリルを前後に移動させて円形断面試料を採取する方法。【選択図】図1
摘要翻译：要解决的问题：提供一种用于获取具有圆形横截面的样品的装置和方法。解决方案：用于获取具有圆形横截面的样品的装置包括：驱动部分，用于使轴的轴线旋转的输出轴在水平方向; 核心钻头，其可拆卸地附接到输出轴，其内径基本上等于具有圆形横截面的样品的外径，其总长度至少为具有圆形十字形的样品的总长度部分; 用于定位试样的定位机构，使得具有圆形横截面的样品的取样位置面向所述芯钻头; 用于沿着输出轴的方向移动驱动部的移动机构; 以及具有定位机构和移动机构的主体。在主体中，具有用于插入芯钻的孔的板状构件在定位机构和移动机构之间相对于输出轴垂直地安装在芯钻头和输出轴可以旋转，使得当从样品取出具有圆形横截面的样品时，附着到输出轴和输出轴的芯钻的轴线从开始到结束，彼此相同。还提供了一种采取具有圆形横截面的样品的方法，其中芯钻前后移动以便排屑。

13. 发明专利

JP2014101565A Method of manufacturing case hardened steel and parts omissible of normalizing after hot-forging and excellent in high temperature carburizability 有权
标题翻译：制造硬化钢的方法和加热后的正常化和高温可燃性极好的部件
公开(公告)号：JP2014101565A
公开(公告)日：2014-06-05
申请号：JP2012255752
申请日：2012-11-22
申请人： Jfe Bars & Shapes Corp , Jfe条鋼株式会社
发明人： FUKUOKA KAZUAKI , TOMITA KUNIKAZU
IPC分类号： C22C38/00 , C21D1/06 , C21D7/06 , C21D8/06 , C21D9/28 , C21D9/32 , C21D9/40 , C22C38/60 , C23C8/22 , C23C8/32 , C23C8/80
摘要： PROBLEM TO BE SOLVED: To provide a method of manufacturing a case hardened steel and parts omissible of normalizing after hot forging and excellent in high temperature carburizability.SOLUTION: There is provide a case hardened steel containing, by mass%, C:0.10 to 0.35%, Si:0.50 to 1.50%, Mn:0.30 to 1.50%, S:0.030 to 0.080%, Cu:0.02 to 0.35%, Cr:0.15 to 1.50%, Al:0.050 to 0.100%, Ti:0.050 to 0.300%, N:0.0080% or less, and if needed, any one or more kind of Ni, Mo, V, B, Nb and Sb, and the balance Fe with inevitable impurities, having an area ratio of ferrite and pearlite of 80% or more, the particle size number of ferrite of 8.0 or less and there are total 5 or more/100 μmof Ti sulfide or Ti carbonitride having a diameter of 500 nm or less, 50/μmor more of carbide or carbonitride containing Ti having a diameter of 50 nm or less, and a value of X consisting of specific components, which is an index of a transformation initiation temperature of 840 or more.
摘要翻译：要解决的问题：提供一种制造表面硬化钢的方法和热锻后的标准化的部件和高温渗碳性优异。解决方案：提供一种表面硬化钢，以质量％计含有C：0.10〜0.35 ％，Si：0.50〜1.50％，Mn：0.30〜1.50％，S：0.030〜0.080％，Cu：0.02〜0.35％，Cr：0.15〜1.50％，Al：0.050〜0.100％，Ti：0.050〜，N：0.0080％以下，并且如果需要，可以使用具有80％铁素体和珠光体的面积比的Ni，Mo，V，B，Nb和Sb中的一种或多种余量的Fe和不可避免的杂质，或铁素体的粒径数为8.0以下，直径为500nm以下的Ti硫化物或碳氮化Ti的总数为5以上/100μm，含有Ti的直径为50nm以下的碳化物或碳氮化物为50 / 50nm以下，以及由特定成分构成的X的值，其为转变开始温度的指标为840以上。

14. 发明专利

JP2012062536A Case-hardening steel and method for producing the same 有权
标题翻译：硬化钢及其制造方法
公开(公告)号：JP2012062536A
公开(公告)日：2012-03-29
申请号：JP2010208303
申请日：2010-09-16
申请人： Jfe Bars & Shapes Corp , Jfe Steel Corp , Jfeスチール株式会社 , Jfe条鋼株式会社
发明人： KASAI MASAYUKI , HASE KAZUKUNI , KIMURA HIDETO , FUKUOKA KAZUAKI , TOMITA KUNIKAZU
IPC分类号： C22C38/00 , B21B1/16 , B22D11/00 , B22D11/22 , C21D8/06 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To provide a case-hardening steel which shows good forgeability even when it is cold-forged, suppresses coarsening of crystal grains attributable to heating for carburization and is excellent in a fatigue characteristics.SOLUTION: The case-hardening steel has composition containing, by mass%, 0.05-0.40% C, ≤1.0% Si, ≤1.0% Mn, ≤0.03% P, ≤0.03% S, ≤2.0% Cr, ≤0.1% Al, 0.05-0.30% Ti, 0.1-0.5% Cu, 0.002-0.02% Sb, ≤0.0060% N, ≤0.0020% O and the balance Fe with inevitable impurities, wherein ≥30 pieces/μmof Ti-containing precipitates having a diameter of ≥30 nm are present, and a ratio, by number, of Ti precipitates having a diameter of 5-50 nm to the total Ti precipitates is ≥50%.
摘要翻译：要解决的问题：为了提供即使在冷锻时也显示出良好的锻造性的表面硬化钢，可以抑制由于加热而导致的渗碳的晶粒粗化，并且疲劳特性优异。＆lt; P＆gt;解决方案：表面硬化钢具有以质量％计含有0.05-0.40％C，≤1.0％Si，≤1.0％Mn，≤0.03％P，≤0.03％S，≤2.0％Cr，≤ 0.1％Al，0.05-0.30％Ti，0.1-0.5％Cu，0.002-0.02％Sb，≤0.0060％N，≤0.0020％O，余量为Fe与不可避免的杂质，其中≥30件/μm

15. 发明专利

JP2011052299A Bn free-cutting steel having excellent cutting chip treatability 有权
标题翻译： BN自由切割钢具有优异的切割切屑可处理性
公开(公告)号：JP2011052299A
公开(公告)日：2011-03-17
申请号：JP2009204171
申请日：2009-09-04
申请人： Jfe Bars & Shapes Corp , Jfe条鋼株式会社
发明人： MURAKAMI TOSHIYUKI , TOMITA KUNIKAZU , SHIRAGAMI TETSUO
IPC分类号： C22C38/00 , C22C38/06 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To provide a BN free-cutting steel having excellent machinability, particularly in cutting chip treatability.
SOLUTION: The BN free-cutting steel having excellent cutting chip treatability contains, by mass, 0.10 to 0.35 to 1.50% Si, 0.30 to 2.0% Mn, >0.015 to 0.2% S, 0.010 to 0.10% Al, 0.0050 to 0.0150% B and 0.0100 to 0.0200% N, and, if required, one or more kinds selected from among ≤2.0% Ni, ≤2.0% Cr and ≤2.0% Mo, and the balance Fe with inevitable impurities, and satisfies inequality (1): 5.1≤[Si]-[N]+3×10
-6 [B]
3 -8[B]
2 +900[B]≤13.9 (wherein, the inside of the [ ] denotes the content (mass%) of each element).
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种具有优异的可加工性的BN自由切削钢，特别是在切屑可处理性方面。解决方案：具有优异的切屑可处理性的BN自由切削钢质量含有0.10〜0.50％的C，0.35〜1.50％的Si，0.30〜2.0％的Mn，> 0.015〜0.2％的S，0.010〜 0.10％Al，0.0050〜0.0150％B和0.0100〜0.0200％N，如果需要，可以选择≤2.0％Ni，≤2.0％Cr和≤2.0％Mo中的一种或多种，余量为Fe和不可避免的杂质，并且满足不等式（1）：5.1≤[Si] - [N] + 3×10 -6 [B] 3 -8 [B] +900 [B]≤13.9（其中，[]的内部表示各元素的含量（质量％））。版权所有（C）2011，JPO＆INPIT

16. 发明专利

JP2010270346A Non-heat treated steel for hot-forging, having high bending fatigue strength and small amount of deformation due to repeating stress, and method for manufacturing parts of the same 有权
标题翻译：用于热锻的非热处理钢，具有高弯曲疲劳强度和重复应力的变形量小，及其制造方法
公开(公告)号：JP2010270346A
公开(公告)日：2010-12-02
申请号：JP2009120722
申请日：2009-05-19
申请人： Jfe Bars & Shapes Corp , Jfe条鋼株式会社
发明人： FUKUOKA KAZUAKI , TOMITA KUNIKAZU
IPC分类号： C22C38/00 , B21J5/00 , C21D1/06 , C21D7/06 , C21D8/06 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To provide a non-heat treated steel for hot-forging, which has high bending fatigue strength and is difficult to cause the deformation when repeated stress is applied in a low strain zone, and to provide a method for manufacturing parts of the same.
SOLUTION: This steel has the composition composed of respective specific contents of C, Si, Mn, P, S, Cr, Mo, V, Al, Ti, N and if necessary, Cu or Ni wherein the formula (1) is satisfied and the balance Fe with inevitable impurities, and has a hot-forged coarse material structure, wherein a ferrite having volume fraction (F%) of 4-23, and a pearlite are contained, and the volume fraction of bainite is ≥5%, and the ferrite volume fraction (F%) and the ferrite average grain diameter (μm) and the content of V (mass%), satisfy the formula (2). The formula (1): 3.10≤2.7×Mn+4.6×Cr+V≤5.60, and the formula (2): 0.04≤ferrite volume fraction (F%)×V/ferrite average diameter (μm)≤0.18. The hot-forged rough material is heated to 1,200-1,300°C and then is subjected to hot-forging at the finished temperature of ≥1,050°C, and the forged steel is cooled at the cooling speed of ≤0.8°C/sec.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种热锻的非热处理钢，其具有高弯曲疲劳强度，并且在低应变区域中施加重复应力时难以引起变形，并且提供一种方法用于制造相同的部件。解决方案：该钢具有由C，Si，Mn，P，S，Cr，Mo，V，Al，Ti，N各自的特定含量组成的组成，并且如果需要，Cu或Ni，其中式（1）并且具有不可避免的杂质的平衡Fe，并且具有热锻粗材料结构，其中含有体积分数（F％）为4-23的铁素体和珠光体，并且贝氏体的体积分数≥5 ％，铁素体体积分率（F％）和铁素体平均粒径（μm）和V（质量％）的含量满足式（2）。公式（1）：3.10≤2.7×Mn + 4.6×Cr +V≤5.60，式（2）：0.04≤铁素体积分数（F％）×V /铁素体平均直径（μm）≤0.18。将热锻粗材料加热至1,200-1,300℃，然后在最终温度≥1050℃下进行热锻，锻造钢以≤0.8℃/秒的冷却速度冷却。版权所有（C）2011，JPO＆INPIT

17. 发明专利

JP2010215986A Steel for aging treatment 有权
标题翻译：老化钢治疗
公开(公告)号：JP2010215986A
公开(公告)日：2010-09-30
申请号：JP2009066045
申请日：2009-03-18
申请人： Jfe Bars & Shapes Corp , Jfe Steel Corp , Jfeスチール株式会社 , Jfe条鋼株式会社
发明人： OMORI YASUHIRO , FUKUOKA KAZUAKI , TOMITA KUNIKAZU , MARUTA KEIICHI
IPC分类号： C22C38/00 , C21D8/06 , C22C38/14
摘要： PROBLEM TO BE SOLVED: To provide a steel for aging treatment which has excellent fatigue properties after being aging-treated, and to provide an aging-treated component. SOLUTION: The steel has a composition including specified amounts of C, Si, Mn, Ti and Mo, and, if required, including one or more kinds selected from among Nb, V and W, also satisfying a parameter expression composed of these elements, and the balance Fe with inevitable impurities, and the steel has a structure after being aging-treated, in which the area ratio of bainite is ≥50%, while the average packet size of the bainite is ≤80 μm, and fine precipitates with a grain size of COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种老化处理后的耐疲劳特性优异的老化处理用钢，并提供老化处理成分。解决方案：钢具有包括规定量的C，Si，Mn，Ti和Mo的组成，并且如果需要，包括选自Nb，V和W中的一种或多种，也满足由这些元素，余量为Fe与不可避免的杂质，钢具有老化处理后的贝氏体面积率≥50％的结构，而贝氏体的平均包装尺寸≤80μm，细颗粒大小<10nm的沉淀物以分散的方式沉积在贝氏体相中，其量为所有析出物的≥90％。该组件使用钢。版权所有（C）2010，JPO＆INPIT

18. 发明专利

JP2008031542A Cold-forged component and manufacturing method therefor 有权
标题翻译：冷锻组件及其制造方法
公开(公告)号：JP2008031542A
公开(公告)日：2008-02-14
申请号：JP2006208762
申请日：2006-07-31
申请人： Jfe Bars & Shapes Corp , Jfe Steel Kk , Jfeスチール株式会社 , Jfe条鋼株式会社
发明人： KASAI MASAYUKI , TOMITA KUNIKAZU , TOYOOKA TAKAAKI , FUKUOKA KAZUAKI , SHIRAGAMI TETSUO
IPC分类号： C22C38/00 , C21D8/12 , C22C38/14 , C22C38/60 , H01F1/36
摘要： PROBLEM TO BE SOLVED: To provide a cold-forged component which has adequate magnetic properties particularly as a core material for a rotor and has a high yield strength.
SOLUTION: This cold-forged component has a controlled composition comprising 0.040 mass% to 0.120 mass% C, 0.5 mass% or less Si, 0.60 mass% to 3.00 mass% Mn, 0.1 mass% or less Al, 0.03 mass% to 0.35 mass% Ti, and 0.05 mass% to 0.8 mass% Mo, and the balance Fe with unavoidable impurities; and has a structure in which fine precipitates with particle sizes of less than 10 nm are dispersed in ferrite, the intensity ratio of a {100} face to a {211} face is 0.7 or larger, and the intensity ratio of the {110} face to the {211} face is 0.4 or smaller.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种特别作为转子的芯材具有足够的磁特性并具有高屈服强度的冷锻部件。解决方案：该冷锻成分具有C：0.040质量％〜0.120质量％，Si：0.5质量％以下，0.60质量％〜3.00质量％Mn，0.1质量％以下Al，0.03质量％至0.35质量％的Ti和0.05质量％至0.8质量％的Mo，余量为Fe，不可避免的杂质; 并且具有粒径小于10nm的微细析出物分散在铁素体中的结构，ä100}面与ä211}面的强度比为0.7以上，并且ä110}的强度比与 ä211}面为0.4或更小。版权所有（C）2008，JPO＆INPIT

19. 发明专利

JP2007284774A Wire rod superior in delayed fracture resistance and cold workability, and manufacturing method therefor 审中-公开
$Wire rod superior in delayed fracture resistance and cold workability, and manufacturing method therefor$
标题翻译：电线长度在延迟断裂电阻和冷加工性及其制造方法
公开(公告)号：JP2007284774A
公开(公告)日：2007-11-01
申请号：JP2006116596
申请日：2006-04-20
申请人： Jfe Bars & Shapes Corp , Jfe条鋼株式会社
发明人： KIKUCHI KATSUHIKO , SHIRAGAMI TETSUO
IPC分类号： C22C38/00 , C21D8/06 , C22C38/38 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a wire rod superior in delayed fracture resistance and cold workability, and to provide a manufacturing method therefor. SOLUTION: The wire rod has a steel composition comprising, by mass%, 0.05 to 0.2% C, 0.3 to 1% Si, 0.8 to 2.5% Mn, 0.035% or less P, 0.035% or less S, 0.1 to 1% Cr, 0.005 to 1% Al, 0.003 to 0.015% N, 0.005% or less O, one or more elements among Nb, Ti, V, Mo, Ni, Cu, and Sn, as needed, while controlling Ceq(=C+Si/7+Mn/5+Cr/9) into 0.85% or less, and the balance Fe with unavoidable impurities; and has a microstructure of a bainitic structure. The manufacturing method comprises the steps of: hot-rolling the steel having the above composition; immediately cooling it to 5 to 50°C; and then cold-drawing the hot-rolled steel into a steel wire. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供优异的延迟断裂性和冷加工性的线材，并提供其制造方法。钢丝的组成为：以质量％计含有0.05〜0.2％的C，0.3〜1％的Si，0.8〜2.5％的Mn，0.035％以下的P，0.035％以下的S，0.1〜 1％Cr，0.005〜1％Al，0.003〜0.015％N，0.005％以下O，Nb，Ti，V，Mo，Ni，Cu，Sn中的1种以上元素，同时控制Ceq（= C + Si / 7 + Mn / 5 + Cr / 9）为0.85％以下，余量为Fe，不可避免的杂质; 并具有贝氏体结构的微结构。该制造方法包括以下步骤：对具有上述组成的钢进行热轧; 立即将其冷却至5〜50℃; 然后将热轧钢冷拔成钢丝。版权所有（C）2008，JPO＆INPIT

20. 发明专利

JP2007092107A Steel for high frequency induction hardened gear excellent in impact property, bending fatigue property, contact fatigue property, and method for producing gear 有权
标题翻译：用于高频感应硬化齿轮的钢铁在冲击性能，弯曲疲劳性能，接触疲劳性能和生产齿轮的方法
公开(公告)号：JP2007092107A
公开(公告)日：2007-04-12
申请号：JP2005281102
申请日：2005-09-28
申请人： Jfe Bars & Shapes Corp , Jfe条鋼株式会社
发明人： SHIRAGAMI TETSUO , FUKUOKA KAZUAKI
IPC分类号： C22C38/00 , B21J5/00 , B21K1/30 , C21D1/10 , C21D1/18 , C21D6/00 , C21D9/32 , C22C38/38 , F16H55/06
CPC分类号： Y02P10/253
摘要： PROBLEM TO BE SOLVED: To provide steel for high frequency induction hardened gear which is suitable for a gear which requires excellent impact characteristic, bending fatigue strength and contact fatigue strength, to be used in the automobile and various kinds of industrial machines, and a method for producing the gear using the same. SOLUTION: The steel for high frequency induction hardened gear excellent in impact characteristic, bending fatigue characteristic and contact fatigue characteristic, is composed of, by mass, 0.25-0.50% C, ≥1.5% Si, 0.3-2.0% Mn, ≤0.7% Cr, and when needed, one or more elements of 0.010-0.060% Nb, 0.005-0.05% Ti and 0.0005-0.01% B, and the balance Fe with inevitable impurities. In the steel, Z obtained with formula (1) satisfies 18≤Z≤38. Z=10Si+Cr+50(D×Ceq)/A... (1). Wherein, Si, Cr are contents (mass%), D is hardening property index (mm), Ceq is carbon equivalent (mass%) and A is Ac 3 transforming point (°C). COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了提供适用于汽车和各种工业机械中使用的要求优异的冲击特性，弯曲疲劳强度和接触疲劳强度的齿轮的高频感应淬火齿轮用钢，以及使用该齿轮的齿轮的制造方法。
解决方案：冲击特性，弯曲疲劳特性和接触疲劳特性优异的高频感应淬火齿轮钢，以质量计为0.25-0.50％C，≥1.5％Si，0.3-2.0％Mn， ≤0.7％的Cr，并且当需要时，一种或多种元素为0.010-0.060％Nb，0.005-0.05％Ti和0.0005-0.01％B，余量为Fe与不可避免的杂质。在钢中，用式（1）得到的Z满足18≤Z≤38。 Z = 10Si + Cr + 50（D×Ceq）/ A ...（1）。其中，Si，Cr为含量（质量％），D为硬化性指标（mm），Ceq为碳当量（质量％），A为Ac 3 变形点（℃）。版权所有（C）2007，JPO＆INPIT

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式