摘要
通过粉末冶金工艺制备建筑用多孔不锈钢材料,对不同孔隙率的试样进行力学强度与耐蚀性测试。结果表明:当造孔剂加入量增加,试样生成更多的孔隙,引起孔隙率升高,孔隙分布更均匀。试样中都包含奥氏体A相及部分氮化物,析出一定量的CrN与Cr2N组织。当造孔剂加入量增大,试样拉伸强度与屈服强度缓慢减小,多孔块体和具有致密结构的块体在力学性能方面存在显著差异;试样自腐蚀电位逐渐降低,从-0.761 V降低至-0.988 V;腐蚀电流密度增大,从0.002 mA/cm2上升到0.496 mA/cm2,腐蚀速率增大。
The porous stainless steel materials for construction were prepared by powder metallurgy process. The mechanical strength and corrosion resistance with different porosity were tested.The results show that when the amount of pore-forming agent increases,more pores are formed and the porosity increases,resulting in more uniform pores.Each sample contains austenite A phase and partial nitride,precipitates a certain amount of CrN and Cr2N.When the content of pore-forming agent increases,the tensile strength and yield strength of the sample decreases slowly,and there are significant differences in mechanical properties between the porous block and the block with dense structure.When the addition of pore-forming agent increases,the self-corrosion potential of the sample decreases gradually,from -0.761 V to-0.988 V. The corrosion rate increases with corrosion current density increasing from 0.002 m A/cm2 to 0.496 m A/cm2.
作者
牛萍萍
刘瑛
曹萍
NIU Ping-ping;LIU Ying;CAO Ping(School of architecture and engineering,shaanxi vocational and technical college,xi'an 710038,China;School of architecture and civil engineering,xi'an university of science and technology,xi'an 710038,China)
出处
《粉末冶金工业》
CAS
北大核心
2020年第3期64-67,共4页
Powder Metallurgy Industry
基金
陕西省教育厅“十三五”科学技术项目(JJKH20190834KJ)。
关键词
不锈钢
粉末冶金
多孔
力学性能
耐腐蚀性能
stainless steel
powder metallurgy
porous
mechanical property
corrosion resistance
