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    • 1. 发明授权
    • Steel bar or wire rod for cold forging and method of producing the same
    • 用于冷锻的钢筋或线材及其制造方法
    • US06866724B2
    • 2005-03-15
    • US10168650
    • 2000-12-22
    • Tatsuro OchiHideo KanisawaKen-ichiro Naito
    • Tatsuro OchiHideo KanisawaKen-ichiro Naito
    • C21D8/06C21D1/32C21D9/52C22C38/00C22C38/04C22C38/06C22C38/22C22C38/60C22C38/02
    • C21D9/525C21D1/32C21D8/06C21D2211/002C21D2211/008C21D2211/009C22C38/002C22C38/04C22C38/06C22C38/22
    • A bar or wire product for use in cold forging, characterized in that it comprises a steel having the chemical composition, in mass %: C: 0.1 to 0.6%, Si: 0.01 to 0.5%, Mn: 0.2 to 1.7%, S: 0.001 to 0.15%, Al: 0.015 to 0.05%, N: 0.003 to 0.025%, P: 0.035% or less, O: 0.003% or less and balance: Fe and inevitable impurities, and it has, in the region from the surface thereof to the depth of the radius thereof×0.15, a structure wherein ferrite accounts for 10 area % or less and the balance is substantially one or more of martensite, bainite and pearlite, and the average hardness in the region from the depth of the radius thereof×0.5 to the center thereof is less than that of the surface layer thereof by 20 or more of HV; and a method for producing the bar or wire product. The bar or wire product is excellent in the ductility after spheroidizing and thus allows the prevention of occurrence of cracks in a steel product during cold forging, which has conventionally been a problem in manufacturing structural parts for a machine by cold forging.
    • 一种用于冷锻的棒材或线材制品,其特征在于它包括质量%:C:0.1至0.6%,Si:0.01至0.5%,Mn:0.2至1.7%的化学成分的钢,S: 0.001〜0.15%,Al:0.015〜0.05%,N:0.003〜0.025%,P:0.035%以下,O:0.003%以下,余量:Fe和不可避免的杂质, 其半径为x0.15的深度,其中铁素体占10面积%以下,余量基本上为马氏体,贝氏体和珠光体的一种以上,从半径方向的区域的平均硬度 其中心部分的中心部分的表面层的厚度小于HV的20以上; 以及用于制造棒材或线材制品的方法。 棒材或线材制品在球化后的延展性优异,因此能够防止在冷锻期间的钢制品中产生裂纹,这在制造冷锻机械的结构部件时一直存在问题。
    • 2. 发明授权
    • Non-tempered steel for mechanical structure
    • 用于机械结构的非回火钢
    • US6036790A
    • 2000-03-14
    • US230403
    • 1999-01-25
    • Hiromasa TakadaTetsuro HashiguchiHideo Kanisawa
    • Hiromasa TakadaTetsuro HashiguchiHideo Kanisawa
    • C22C38/00C22C38/12C22C38/14C22C38/28C22C38/60
    • C22C38/12C22C38/60
    • The medium carbon, microalloyed forging steel for machine structural use has a small deformation upon fracture in a hot-rolled, hot-forged, or any other hot-worked state, has an inexpensive ferrite-pearlitic microstructure and consists of C: 0.3 to 0.6 wt %, Si: 0.1 to 2.0 wt %, Mn: 0.1 wt % or more and less than 0.4 wt %, P: 0.01 to 0.1 wt %, S: 0.01 to 0.2 wt %, V: more than 0.15 wt % and up to 0.4 wt %, and the balance: Fe and unavoidable impurities, in which the unavoidable impurities include less than 0.005 wt % N. The microalloyed forging steel for machine structural use may further contain Al: 0.005 to 0.05 wt %, one or both of Ti: 0.005 to 0.05 wt % and Nb: 0.05 to 0.2 wt %, and/or one or both of Cr: 0.1 to 0.5 wt % and Mo: 0.1 to 0.5 wt %.
    • PCT No.PCT / JP98 / 02306 Sec。 371日期1999年1月25日 102(e)日期1999年1月25日PCT提交1998年5月26日PCT公布。 出版物WO98 / 54372 日期1998年12月3日机械结构用中碳微合金锻造钢在热轧,热锻或其他热加工状态下的断裂变形小,具有廉价的铁素体 - 珠光体组织,由 C:0.3〜0.6重量%,Si:0.1〜2.0重量%,Mn:0.1重量%以上且小于0.4重量%,P:0.01〜0.1重量%,S:0.01〜0.2重量%,V: 0.15重量%以上0.4重量%以下,余量为不可避免的杂质含有小于0.005重量%N的Fe和不可避免的杂质。机械结构用微合金化锻钢可以进一步含有Al:0.005〜0.05重量% ,Ti:0.005〜0.05重量%,Nb:0.05〜0.2重量%,Cr:0.1〜0.5重量%,Mo:0.1〜0.5重量%的一个或两个。
    • 5. 发明授权
    • High strength drive shaft and process for producing the same
    • 高强度驱动轴及其制造方法
    • US06383311B1
    • 2002-05-07
    • US09442506
    • 1999-11-18
    • Tatsuro OchiHideo KanisawaKenichiro NaitoJoji TamuraMasayoshi Saga
    • Tatsuro OchiHideo KanisawaKenichiro NaitoJoji TamuraMasayoshi Saga
    • C22C3814
    • C21D9/28C21D1/10C22C38/22C22C38/28C22C38/60Y02P10/253
    • Disclosed are a high strength drive shaft and a process for producing the same. The high strength drive shaft comprises as a steel material, by weight, carbon: 0.48 to 0.58%, silicon: 0.01 to 0.15%, manganese: 0.35 to 0.75%, sulfur: 0.005 to 0.15%, molybdenum: 0.1 to 0.35%, boron 0.0005 to 0.005%, aluminum: 0.015 to 0.05%, and titanium: 0.02 to 0.08%, the proportion of the effective case depth of an involute serration in its end of the drive shaft being 0.3 to 0.7 in terms of the ratio of the effective case depth t to the radius r, t/r. The involute serration in its end preferably has a former austenite grain size of not less than 8 in terms of the grain size number specified in JIS (Japanese Industrial Standards). A steel comprising the above constituents and having a hardness of 85 to 95 HRB is machined and form rolled into a shaft, and the shaft is induction hardened and then tempered at 120 to 200° C. to produce the high strength drive shaft.
    • 公开了一种高强度驱动轴及其制造方法。 高强度驱动轴包括碳钢,重量比为0.48〜0.58%,硅:0.01〜0.15%,锰:0.35〜0.75%,硫:0.005〜0.15%,钼:0.1〜0.35%,硼 0.0005〜0.005%,铝:0.015〜0.05%,钛:0.02〜0.08%,驱动轴端部的渐开线锯齿的有效壳深度的比例为0.3〜0.7 情况深度t到半径r,t / r。 其渐开线锯齿末优选以JIS(日本工业标准)规定的粒径数以前的奥氏体晶粒尺寸不小于8。 将包含上述成分并且具有85至95HRC的硬度的钢加工并卷成轴,并将该轴进行感应淬火,然后在120至200℃下回火以产生高强度驱动轴。