摘要
采用Cr^(3+)离子镀液,以SUS304钢为阳极和Fe离子源,在4Cr10Si2Mo钢表面电沉积了非晶态Cr-Fe-C三元合金镀层,之后在不同温度下对镀层进行退火。通过XRD、EDS分析以及硬度实验和极化曲线测量,研究了镀层的成分、组织和性能。结果表明:非晶态Cr-Fe-C镀层主要由(质量分数)65.8%Cr,27%Fe和6.58%C组成,镀层中无显微裂纹,在3%NaCl溶液中的耐蚀性明显优于SUS304不锈钢。镀层硬度随退火温度的升高而增大,600℃退火时硬度达到最高值18000MPa。硬度随温度的变化,与镀层中相继出现Cr原子的偏聚、Cr_3C_2、Cr_7C_3、Cr_(23)C_6和Cr_2O_3等化合物有关。
Ternary amorphous Cr-Fe-C alloy deposits were electroplated on the 4Cr10Si2Mo steel deposits a trivalent chromium bath, using SUS304 steel as anode and Fe ion source, and then annealed at different temperatures. The composition, structure and properties of the deposits were investigated analyzing of XRD, SEM, EDS and measuring of hardness and polarization curves. The results show that the deposits consisting of 65.8wt% Cr, 27 wt% Fe and 6.58 wt% C have fewer microcracks, exhibiting much better anticorrosion than SUS304 steel in 3 wt% NaCl solution. With the increase of temperature, the hardness of the deposits increase and it reaches the maximum of about 18000 MPa at 600 ℃. The changes of the hardness are related to the presence of such compound phases as Cr3C2, Cr7C3,Cr23C6 within the deposits.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2007年第A02期548-551,共4页
Rare Metal Materials and Engineering
基金
国家自然科学基金(50572017)
黑龙江省自然科学基金(E200525)资助
