公开(公告)号：US4614551A

公开(公告)日：1986-09-30

申请号：US740352

申请日：1985-06-03

申请人： Takashi Furukawa ,  Michio Endo ,  Nagayasu Takemoto ,  Kunio Watanabe

发明人： Takashi Furukawa ,  Michio Endo ,  Nagayasu Takemoto ,  Kunio Watanabe

IPC分类号： C21D8/02 ,  C21D7/14

CPC分类号： C21D8/0226 ,  C21D2211/001 ,  C21D2211/005 ,  C21D2211/008

摘要： A process for producing a low yield ratio, high strength two-phase steel sheet comprising hot rolling a steel composition containing 0.03 to 0.13% C, 0.8 to 1.7% Mn, not more than 0.1% Al, not more than 2.0% Si and not more than 0.5% Cr with a finishing temperature ranging from 750.degree. C. to 890.degree. C., rapidly cooling the strip to a temperature not higher than 230.degree. C., and coiling the strip at a temperature not higher than 230.degree. C. with the temperature variation during the period between the start and end of the coiling being no more than 100 degrees C. The Si content is limited to 1% or less for applications where paintability is of primary importance, and is limited to a range of from 1 to 2% for applications where the ductility is of primary importance. The process effects improvements in the artificial ageing property after working which improvement is uniform throughout the whole length of a coiled strip. The product obtained by the process is also described.

摘要翻译： 一种生产低屈服比的高强度两相钢板的方法，包括热轧含有0.03至0.13％的C，0.8至1.7％的Mn，不超过0.1％的Al，不超过2.0％的Si，而不是 超过0.5％的Cr，终轧温度为750℃至890℃，快速冷却至不高于230℃的温度，并在不高于230℃的温度下卷取带材。 在卷取开始和结束之间的期间的温度变化不超过100℃。对于可涂漆性是至关重要的应用，Si含量被限制在1％以下，并且限于从 对于延展性至关重要的应用，1％至2％。 该工艺对加工后的人造时效性能的改善在线圈条的整个长度上均匀化。 还描述了通过该方法获得的产物。

公开(公告)号：US4316753A

公开(公告)日：1982-02-23

申请号：US22500

申请日：1979-03-21

申请人： Kunishige Kaneko ,  Mamoru Tashiro ,  Nagayasu Takemoto ,  Itaru Imabayashi ,  Takashi Furukawa

发明人： Kunishige Kaneko ,  Mamoru Tashiro ,  Nagayasu Takemoto ,  Itaru Imabayashi ,  Takashi Furukawa

IPC分类号： C22C38/00 ,  C21D8/02 ,  C21D9/46 ,  C21D7/14

CPC分类号： C21D8/0226 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/008

摘要： A method for producing a low alloy hot rolled steel strip or sheet comprising hot rolling a steel slab at a finishing temperature not higher than the Ar.sub.3 transformation temperature plus 60.degree. C. and cooling and coiling the hot rolled strip at a temperature not higher than 500.degree. C. The steel slab contains not more than 0.20% carbon, 0.50 to 2.50% manganese and 0.05 to 1.0% chromium and optionally contains not more than 1.0% silicon, the balance being iron and unavoidable impurities. The resultant strip or sheet has a high tensile strength of not less than 40 kg/mm.sup.2, a low yeild ratio of not more than 70% and an excellent total elongation of not less than 25%.

摘要翻译： 一种低合金热轧钢带或板材的制造方法，其特征在于，在不高于Ar 3转变温度加上60℃的终轧温度下对钢坯进行热轧，在不高于500℃的温度下冷却并卷取热轧带材 钢坯中含有不超过0.20％的碳，0.50至2.50％的锰和0.05至1.0％的铬，并且任选地含有不超过1.0％的硅，余量为铁和不可避免的杂质。 得到的带材或片材具有不低于40kg / mm2的高拉伸强度，不高于70％的低比例和不低于25％的优异的总伸长率。