公开(公告)号：US20220178007A1

公开(公告)日：2022-06-09

申请号：US17498779

申请日：2021-10-12

Applicant: University of Science and Technology Beijing

Inventor： Zhiyong LIU ,  Xiaogang LI ,  Wei WU

IPC: C22C38/50 ,  C22C38/42 ,  C22C38/48 ,  C22C38/00 ,  C21D8/00

Abstract: A binary alloy design method for a marine high-strength low-alloy (HSLA) stress corrosion-resistant steel is provided. The binary alloy design method permits synergistic inhibition of anodic dissolution and hydrogen embrittlement by binary alloying to prepare the marine HSLA stress corrosion-resistant steel, the marine HSLA stress corrosion-resistant steel has an increase of more than 50% in stress corrosion resistance in a simulated SO2 polluted marine atmospheric environment. Microalloying of one element is carried out to improve properties of a rust layer on a surface of a HSLA steel in a marine environment and reduce a electrochemical activity in a local microenvironment to inhibit the anodic dissolution. Microalloying of another element is carried out to reduce a cathodic hydrogen evolution, to increase a hydrogen trap density and to decrease a multiplicative hydrogen diffusion channel density as well as enhance a hydrogen resistance of a structure to inhibit the hydrogen embrittlement.