专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4020312A Method of manufacturing thick, high-strength steel pipe for low temperature service 失效
标题翻译：制造用于低温服务的厚，高强度钢管的方法
公开(公告)号：US4020312A
公开(公告)日：1977-04-26
申请号：US634325
申请日：1975-11-21
申请人： Mutsuro Araki , Bunshiro Sakai , Itaru Watanabe , Makoto Yamada , Koshiro Tsukada , Tomokazu Godai , Isao Aida , Masatoshi Nakagaki
发明人： Mutsuro Araki , Bunshiro Sakai , Itaru Watanabe , Makoto Yamada , Koshiro Tsukada , Tomokazu Godai , Isao Aida , Masatoshi Nakagaki
IPC分类号： B23K9/16 , B21C37/08 , B23K9/173 , B23K9/23 , B23K35/30 , C22C38/00 , C22C38/08 , B23K31/06 , B23K9/18 , B23K35/34
CPC分类号： C22C38/08 , B23K35/3053 , B23K9/23
摘要： A method of manufacturing a thick, high-strength steel pipe for low temperature service comprising the steps of forming into tubular shape a steel plate having a thickness of over 12 mm and a specific composition, of which the C.sub.eq value is adjusted to less than 0.50, when the Mn content is less than 1.0 % whereas the C.sub.eq value is adjusted to less than 0.45 when the Mn content is over 1.0 % and less than 2.0 %, and nextly of welding said tube form at high speeds and high efficiency by the process of single electrode or multiple electrode large-current gas-shielded arc welding with one pass per electrode on each side of the seam at a specific condition, each electrode preferably consisting of a solid wire essentially containing less than 0.3 % Ti with or without the addition of less than 0.01 % B, and said steel pipe having, in its as-welded condition, mechanical properties such that the yield point of the base metal portion is over 60,000 psi and the weld zone has a maximum hardness of less than Hv10-280 and a Charpy test absorbed energy of over 7 Kg.m at -10.degree. F. Even when the C.sub.eq value of said steel plate is less than 0.65, a thick, high-strength steel pipe for low temperature service having equal mechanical properties to the above mentioned pipe may be manufactured, after welding, by subjecting the welded pipe to a post heat treatment in which the welded pipe is held at a temperature between 500.degree. and 700.degree. C for less than 1 hour.
摘要翻译：一种制造用于低温服务的厚的高强度钢管的方法，包括以下步骤：将Ceq值调节至小于0.50的厚度大于12mm的钢板和具体组成的管状当Mn含量小于1.0％时，当Mn含量超过1.0％且小于2.0％时Ceq值调节至小于0.45，接下来通过该方法以高速和高效率焊接所述管形式的单电极或多电极大电流气体保护电弧焊接，在特定条件下，每个电极在接缝的每一侧上一次通过，每个电极优选由基本上包含小于0.3％的Ti的实线组成，具有或不具有添加小于0.01％B，并且所述钢管在其焊接条件下具有使得贱金属部分的屈服点超过60,000psi并且焊接区具有最大硬度的机械性能小于Hv10-280，夏比试验在-10°F时吸收的能量超过7Kg.m。即使所述钢板的Ceq值小于0.65，也可使用厚度高的低温用钢管，可以通过对焊接管进行后热处理，焊接管在500〜700℃的温度下保持1小时以上，可以制造与上述管相同的机械特性。

IPRDB

热门服务

关于我们

友情链接

联系方式