公开(公告)号：US4851052A

公开(公告)日：1989-07-25

申请号：US186077

申请日：1988-04-25

申请人： Koyoshi Nishioka ,  Hiroshi Tamehiro ,  Masahiko Murata

发明人： Koyoshi Nishioka ,  Hiroshi Tamehiro ,  Masahiko Murata

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

CPC分类号： C22C38/00 ,  C21D8/021 ,  C21D9/46 ,  C21D2211/005 ,  C21D8/0226

摘要： A method of producing steel plate with good low-temperature toughness comprises the steps of casting a steel melt consisting of 0.001-0.300 wt % C, not more than 0.8 wt % Si, 0.4-2.0 wt % Mn, not more than 0.007 wt % Al, 0.0010-0.0100 wt % O and the remainder of iron and unavoidable, impurities, and subjecting the cast steel either as it is or after rolling at a small reduction ration to accelerated cooling. In the cooling step, a fine-grained acicular ferrite texture having oxide-system inclusions as the nuclei develops radially and provides the resulting steel plate with excellent low-temperature toughness.

公开(公告)号：US3973999A

公开(公告)日：1976-08-10

申请号：US595310

申请日：1975-07-11

申请人： Masatoki Nakayama ,  Hajime Nakasugi ,  Hiroshi Tamehiro ,  Turugi Kimura ,  Masanobu Yamaguti

发明人： Masatoki Nakayama ,  Hajime Nakasugi ,  Hiroshi Tamehiro ,  Turugi Kimura ,  Masanobu Yamaguti

IPC分类号： B21D7/16 ,  C21D8/10 ,  C21D9/08

CPC分类号： C21D9/08 ,  C21D8/10

摘要： A method for producing a high tensile strength and toughness bend pipe in which a heat treatment is done as a pretreatment prior to bending, and a tempering treatment is done, if necessary, after the bending, and the bend pipe produced by the present invention is useful for pipe line construction and shows excellent properties at low temperatures.

摘要翻译： 制造弯曲前的预处理进行热处理的高抗拉强度和韧性弯曲管的方法，如果需要，进行回火处理后的弯曲，本发明制造的弯曲管是 适用于管线施工，在低温下表现出优异的性能。