摘要
采用电子万能试验机、显微硬度计以及电化学综合测试仪分别测试了Ni-Ga-Fe-Co系合金抗压强度、显微硬度和在w(NaCl)=3.5%溶液中的阳极极化曲线;研究了热处理对Ni-Ga-Fe-Co系铁磁形状记忆合金耐蚀性能与力学性能的影响。结果表明,室温下铸态Ni50Ga27Fe17Co6合金的耐腐蚀性能最好。热处理使Ni-Ga-Fe-Co系合金的耐蚀性能下降,抗压强度增大,显微硬度取决于热处理后合金的显微组织。热处理后Ni53Ga27Fe15Co5合金的耐蚀性能最好,其自腐蚀电位为-355 mV,腐蚀电流密度为0.4185μA/cm2,钝化电位区间为419 mV。
Compressive strength and microhardness of Ni-Ga-Fe-Co shape memory alloy were measured by microhardness tester and multi-function electronic testing machine.Corrosion resistances of the Ni-Ga-Fe-Co alloy before and after heat treatment were studied by electrokinetic polarization testing in 3.5%NaCl solution.The effects of heat treatment on the corrosion resistance and mechanical properties of the Ni-Ga-Fe-Co alloy were investigated.The results show that the Ni50Ga27Fe17Co6 alloy has the highest corrosion resistance at room temperature.Corrosion resistance of the Ni-Ga-Fe-Co alloy decreases and compressive strength increases after heat treatment.Microhardness of the Ni-Ga-Fe-Co alloy is determined by microstructure after heat treatment.The alloy after heat treatment with the corrosion potential and corrosion current density of-355 mV and 0.4185 μA/cm2,and the passivation potential zone about 419 mV has the highest corrosion resistance.
出处
《热加工工艺》
CSCD
北大核心
2010年第14期141-144,共4页
Hot Working Technology
关键词
热处理
铁磁性形状记忆合金
耐蚀性能
力学性能
heat treatment
ferromagnetic shape memory alloy
corrosion resistance
mechanical properties
