客服热线:18202992950

PROCESS FOR PRODUCTION OF HIGH ALLOY STEEL PIPE 发明申请

2023-01-04 2110 788K 0

专利信息

申请日期 2025-07-10 申请号 WOJP08061617
公开(公告)号 WO2009004970A1 公开(公告)日 2009-01-08
公开国别 WO 申请人省市代码 全国
申请人 SUMITOMO METAL INDUSTRIES LTD; SAGARA Masayuki; SUWABE Hitoshi; AMAYA Hisashi; KIMURA Shigemitsu; IGARASHI Masaaki
简介 The invention provides a process for the production of a high alloy steel which permits pipe making by hot working and which exhibits satisfactory ductility in cold working conducted after pipe making for the purpose of attaining higher strength and is excellent in corrosion resistance. A process for the production of high alloy steel pipes by making a high alloy steel pipe stock having a chemical composition which contains by mass C : 0.03% or below, Si : 1.0% or below, Mn : 0.05 to 1.5%, P : 0.03% or below, S : 0.03% or below, Ni : more than 22% to 40%, Cr : 20 to 30%, Mo : 0.01% to less than 4.0%, Cu : 0 to 4.0%, Al : 0.001 to 0.30%, N : more than 0.05% to 0.30%, and O : 0.010% or below with the balance consisting of Fe and impurities and in which the product of N content and O content satisfies the relationship (1) by hot working and then subjecting the pipe stock to cold working, characterized in that the final step of the cold working is conducted under such conditions that the reduction ratio (Rd) in terms reduction of sectional area satisfies the relationship (2), the pipe stock containing Ca, Mg and/or rare earth elements optionally : N Œ O ≤ 0.001 ...(1) 15 ≤ Rd(%) ≤ 370 Œ (C + N) ... (2) [wherein N, O andC represent their respective contents (% by mass) and Rd represents a reduction ratio (%) in terms of reduction of sectional area].


您还没有登录,请登录后查看下载地址


反对 0举报 0 收藏 0 打赏 0评论 0
下载排行
网站首页  |  关于我们  |  联系方式  |  使用协议  |  版权隐私  |  网站地图  |  排名推广  |  广告服务  |  积分换礼  |  网站留言  |  RSS订阅  |  违规举报  |  京ICP备2021025988号-4