CAJ | 학술논문

依据不锈钢复合板双层金属特性，制定真空热轧成形316L/Q345R 复合板热处理工艺为高温快速冷却+低温缓慢冷却。采用电子显微与能谱图分析分别对热处理前、后复合板试样进行显微组织特征观察和成分含量测定，研究复合界面显微组织、相结构和成分变化规律。采用剪切、拉伸及冲击功试验对两种状态试样进行力学性能测试，研究显微组织对力学性能的影响规律。结果表明：真空热轧后的复合板能较好复合，热轧试样中低合金钢侧组织为铁素体和珠光体，力学性能较差，不锈钢侧析出 Cr 的碳化物较多；经过热处理后，试样组织中有贝氏体出现，不锈钢侧 Cr 在加热制度下重新固溶。热处理实现复相化组织、合金元素界面扩散等复合组织结构的协同作用，从而大幅改善复合板的力学性能和耐腐蚀性能。
의거불수강복합판쌍층금속특성，제정진공열알성형316L/Q345R 복합판열처리공예위고온쾌속냉각+저온완만냉각。채용전자현미여능보도분석분별대열처리전、후복합판시양진행현미조직특정관찰화성분함량측정，연구복합계면현미조직、상결구화성분변화규률。채용전절、랍신급충격공시험대량충상태시양진행역학성능측시，연구현미조직대역학성능적영향규률。결과표명：진공열알후적복합판능교호복합，열알시양중저합금강측조직위철소체화주광체，역학성능교차，불수강측석출 Cr 적탄화물교다；경과열처리후，시양조직중유패씨체출현，불수강측 Cr 재가열제도하중신고용。열처리실현복상화조직、합금원소계면확산등복합조직결구적협동작용，종이대폭개선복합판적역학성능화내부식성능。
According to the double layer metal characteristics of stainless steel clad plate, the heat treatment process, high temperature and rapid cooling and low temperature and slow cooling, for 316L/Q345R clad plate after vacuum hot rolling was formulated. Scanning electron microscope and energy spectrum analysis were used to investigate the microstructure, topography and constituent of clad plate specimens before and after heat treatment. The change rules of interface microstructure, phase structure and constituent were also studied. By applying shear, stretch and impact tests, the mechanical properties of specimens at two states were tested to investigate the relationship between the microstructure and mechanical properties. The results indicate that, after vacuum hot rolling, the clad plate can be successfully combined. The low alloy steel side microstructure of hot rolling sample consists of ferrite and pearlite, so, the mechanical property is poor. The precipitation of Cr carbide is more in the stainless steel side. After heat treatment, Bainite appears in the microstructure of sample, and Cr of the stainless steel side is dissolved again in the heating system. The heat treatment can achieve the synergistic effect of composite structures, such as duplex structure and interfacial diffusion of alloy elements, thus, greatly improve the mechanical properties and corrosion resistance of clad plates.