Austenitic stainless steel used in ultralow-temperature environment

• Main Authors: WANG JIANYONG, JIN WEIQIANG, WANG SHUCHANG, DAI WEIXING, YANG XUELAN, CHEN GENBAO, DU WENWEN
• Format: Patent
• Language: Chinese; English
• Published: 05.09.2023
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to austenitic stainless steel used in an ultralow-temperature environment, and belongs to the technical field of austenitic stainless steel for ultralow-temperature pressure vessels. The invention relates to a high-strength wear-resistant steel plate which comprises the following components in percentage by mass: 0.05-0.08% of C, less than or equal to 0.75% of Si, less than or equal to 2.00% of Mn, 16.00-18.00% of Cr, 10.80-14.00% of Ni, 2.00-3.00% of Mo and 0.06-0.10% of N. According to the austenitic stainless steel used in the ultralow-temperature environment, the Cr content is 16% or above, a compact passive film can be formed, the austenitic stainless steel has good room-temperature mechanical performance and low-temperature impact performance, it is measured through a Charpy impact test at the temperature of-269 DEG C that the absorbed impact energy KV2 is larger than or equal to 235 J, Ms is smaller than or equal to-254 DEG C and far exceeds SUS316LN, and the austenitic stainless