摘要
采用力学性能测试、时效处理、电化学测试、显微硬度以及TEM微观分析等分析手段,研究了19Cr-1.6Mo和19Cr-1.6Mo-0.5Cu两种超纯铁素体不锈钢的力学性能和在3.5%NaCl腐蚀介质中的耐腐蚀性能。试验结果表明:合金元素铜的添加,提高了试验用钢的强度,同时降低了Δr值;随着时效时间的增加,铜析出相尺寸在不断的增加且均匀分布,基体的显微硬度由HV 148增加到HV 162;合金元素铜的添加降低了试验用钢在氯离子溶液下的耐点蚀能力,尤其是随着时效时间的增加,点蚀电位值由390mV降低到290mV,耐点蚀能力呈明显的下降趋势。
The mechanical properties and corrosion resistance in the medium of 3.5% sodium chloride solution of both 19Cr-1.6Mo and 19Cr-1.6Mo-0.5Cu ferritic stainless steels were studied using the analytical measurements of mechanical test,aging treatment,electrochemical measurement,microhardness and transmission electron microscopy.The results show that the strength increases and the Δr value decreases with the copper addition.With the increasing of aging time,the size of copper precipitations continues to increase and distribute uniformly and the microhardness of base metal increases from HV 148 to HV 162.The pitting corrosion resistance of investigated steels in chloride solution media is decreased with the copper addition.Especially with the increasing of aging time,the pitting potential decreases from 390 to 290 mV and a significant decreasing trend of pitting corrosion resistance is found.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2012年第9期45-50,共6页
Journal of Iron and Steel Research
关键词
铁素体
不锈钢
铜
析出相
显微硬度
耐点蚀性能
ferritic
stainless steel
copper
precipitated phase
microhardness
pitting corrosion resistance
