STAINLESS STEEL COMPOSITE PLATE FOR WEATHERING STEEL BRIDGE HAVING LOW YIELD RATIO

WIPO Patent Application WO/2023/065805

A1

Disclosed in the present invention is a stainless steel composite plate for a weathering steel bridge having a low yield ratio, comprising a base material and a covering material which satisfy that an atmospheric corrosion resistance index I is greater than or equal to 6.0, the total thickness being 5-60 mm, and the thickness of the covering material being 0.5-5.0 mm. A preparation method for the stainless steel composite plate comprises: base material and covering material preparation, single-surface blank making, symmetrical blank making, controlled rolling and controlled cooling, tempering heat treatment, and plate splitting and straightening. According to the stainless steel composite plate provided by the present invention, composite interface bonding is good, the shear strength is greater than or equal to 300 MPa, and no crack occurs after the stainless steel composite plate is bent by 180°; a yield ratio is less than or equal to 0.83; the impact energy of the base material at -40°C is greater than or equal to 220 J; and after the covering material is subjected to intergranular corrosion, no intergranular corrosion phenomenon is found, and the covering material has excellent intergranular corrosion resistance.

QIAO MINGLIANG (CN)
ZENG ZHOUYU (CN)
JIANG SHAN (CN)
WANG GUANGLEI (CN)
DANG JUN (CN)
LI DONGHUI (CN)

PCT/CN2022/113887

April 27, 2023

August 22, 2022

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NANJING IRON & STEEL CO LTD (CN)

C22C38/02; B32B15/01

CN113957342A	2022-01-21
CN106271414A	2017-01-04
CN111455287A	2020-07-28
CN101876032A	2010-11-03
JPH06256844A	1994-09-13
CN102319732A	2012-01-18

NANJING SUGAO PATENT AND TRADEMARK FIRM ( ORDINARY PARTNERSHIP ) (CN)

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