Large-depth nano gradient structure hydrogen embrittlement-resistant material and preparation method and device thereof

• Main Authors: ZHU MINGLIANG, ZHAO CHAOJUN, HUANG SHU, JIANG YUNFENG, SHENG JIE, ZHANG SHUAI, WEN JINJIN, SHA QINQING
• Format: Patent
• Language: Chinese; English
• Published: 01.12.2023
• Subjects: CHEMISTRY; 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

According to the large-depth nano gradient structure hydrogen embrittlement-resistant material and the preparation method and device thereof, laser shock peening and ultrasonic shock peening are adopted for strengthening the upper surface of a stainless steel plate at the same time, and when the upper surface of the stainless steel plate is subjected to laser shock peening, an ultrasonic shock nail applies ultrasonic shock; ultrasonic multi-time uniform impact and laser single-time or multi-time high-strain-rate impact are utilized to generate interaction, and a large-depth-gradient nanometer heterostructure and residual compressive stress distribution are formed on the surface of the stainless steel plate. In the micro-scale, hydrogen atoms are prevented from invading through the refined nanometer layer, diffusion of the hydrogen atoms is inhibited through the hydrogen capturing effect of fine grain boundaries, dislocation and the like, and hydrogen-induced plastic loss and hydrogen-induced cracking caused b