摘要
本文以不同冷轧压下量的SUS316L不锈钢基材的碟形弹簧作为研究对象,通过光学显微镜和电子背散射衍射(EBSD)中的取向成像图和相分布图,对点蚀前后的不锈钢基材进行表征。使用万能拉伸机、显微维氏硬度计和铁素体仪对不锈钢基材不同冷轧压下量的碟簧进行力学性能和马氏体转变量测试。结果显示,碟簧强度随SUS316L基材的冷轧压下率的增加而增加,且强度提升主要为加工硬化所致,与α’马氏体的转变量无明显关系。然而,耐蚀性却与冷轧压下率存在负相关关系。经过5%、12%和25%冷轧压下率后,相比未经冷轧的基材,碟簧抗压能力分别提升约4.4%、9.5%、16.7%,点蚀电位下降率分别为5.85%、11.47%和32.45%。
This paper takes disc springs of SUS316L stainless steel substrates with different cold rolling reductions as the research object and characterizes it through Optical Microscope(OM)and orientation imaging map and phase distribution map in Electron Back-Scattered Diffraction(EBSD)before and after pitting corrosion.It tests the mechanical properties andα’martensite transformation of disc springs with different cold rolling reductions of stainless steel substrates by universal tensile test machine,micro-Vickers hardness tester and ferrite content tester.The results show that the strength of the disc springs increases with the increase of cold rolling rate of SUS316L substrate material,and that the increase of strength is mainly caused by work hardening,which is not significantly related to the amount ofα’martensite transformation.However,there is a negative correlation between corrosion resistance and the cold rolling rate.After 5%,12%and 25%cold rolling rates,the compression resistance of the disc springs increases by about 4.4%,9.5%and 16.7%,respectively,compared to the decrease of substrate without cold rolling,and the pitting corrosion potential by 5.85%,11.47%and 32.45%,respectively.
作者
陈小晶
张翼翀
李昂
CHEN Xiao-jing;ZHANG Yi-chong;LI Ang(Shanghai Sinofuelcell Co.,Ltd.)
出处
《标准科学》
2022年第S01期288-292,共5页
Standard Science
作者简介
陈小晶,博士,主要研究方向为燃料电池电堆寿命、策略、诊断及验证;张翼翀,博士,主要研究方向为燃料电池极板结构设计、极板工艺开发、极板材料选型及燃料电池相关其他材料评价;李昂,硕士,主要研究方向为燃料电池极板结构设计及工艺开发。
