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Title:
CORNER-THICKENED COLD/HOT COMPOSITE FORMATION SQUARE/RECTANGULAR STEEL PIPE AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2020/015557
Kind Code:
A1
Abstract:
A corner-thickened cold/hot composite formation square/rectangular steel pipe, wherein the outer corner radius satisfies the following conditions: when t≤6mm, 010mm, 0

Inventors:
HAN JINGTAO (CN)
XU HAIFENG (CN)
WANG YU (CN)
Application Number:
PCT/CN2019/095284
Publication Date:
January 23, 2020
Filing Date:
July 09, 2019
Export Citation:
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Assignee:
SINO RES INSTITUTE OF ROLL FORMING INDUSTRY CAOFEIDIAN CO LTD (CN)
International Classes:
B21C37/15
Foreign References:
CN208703542U2019-04-05
CN104249090A2014-12-31
CN105107866A2015-12-02
CN102574191A2012-07-11
CN103752644A2014-04-30
JP3625785B22005-03-02
Attorney, Agent or Firm:
BEIJING ZHIZHOU PATENT LAW FIRM (CN)
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