压下率对304/高锰钢复合板组织与性能的影响
Effect of Reduction Rate on Microstructure and Properties of 304/High Manganese Steel Clad Plate
文光奇 1赵鑫 1蔡志辉2
作者信息
- 1. 东北大学 材料科学与工程学院,辽宁 沈阳 110819
- 2. 太原科技大学 机械工程学院,山西 太原 030024
- 折叠
摘要
通过轧制压下率的变化研究了 304 不锈钢/高锰钢复合板界面组织结构、合金元素扩散及力学性能的变化规律.结果表明:304/高锰钢复合板界面两侧组织均为稳定的奥氏体,随压下率的增加,晶粒尺寸逐渐减小,且界面两侧晶粒尺寸差异减小.界面处存在大量的小角度晶界,通过细晶强化、晶界强化和位错强化机制提高了复合板结合强度及拉伸性能.此外,随着压下率的提高,元素的扩散层减薄,界面处存在的Al和Mn的氧化物及Cr的碳化物尺寸减小并弥散分布.随压下率提高,复合板界面得到强化,强度逐渐提高,伸长率逐渐降低.
Abstract
The changes of interface structu re,alloying element diffusion and mechanical properties of 304 stainless steel/high manganese steel clad plates were studied by the change of rolling reduction rate.The results show that the microstructure on both sides of the interface of 304/high manganese steel clad plate is stable austenite.With the increase of the reduction rate,the grain size decreases gradually,and the grain size difference on both sides of the interface decreases.There are a lot of small angle grain boundaries at the interface,and the bonding strength and tensile properties are improved by the mechanisms of fine grain strengthening,grain boundary strengthening and dislocation strengthening.In addition,with the increase of the reduction rate,the element diffusion layer is reduced,and the sizes of Al and Mn oxides and Cr carbides at the interface are reduced and dispersed.With the increase of the reduction rate,the clad plate interface is strengthened,the strength gradually increases,and the elongation gradually decreases.
关键词
不锈钢复合板/轧制压下率/界面组织/元素扩散/界面夹杂物Key words
stainless steel clad plate/rolling reduction rate/interface structure/element diffusion/interfacial inclusions引用本文复制引用
基金项目
国家自然科学基金(51974084)
太原科技大学博士启动经费项目(20202039)
出版年
2024
NETL
NSTL
万方数据