Research on Surface Defects of 304 Austenitic Stainless Steel Weilong Wang, Hao Shen, Qianning Gu, Rui Zhang, Jiahao Wang and Xi Shi E3S Web Conf., 561 (2024) 03002 Published online: 09 August 2024 DOI: 10.1051/e3sconf/202456103002