摘要
加热后分别采用自来水、淬火油、流动空气及炉内静止空气冷却等不同冷却方式 ,对 14 2 0铝锂合金进行固溶 ,随后再进行时效处理。采用三点弯曲恒应变法检测试样的抗应力腐蚀性能 ,在恒电位仪上测试样的阳极极化曲线 ,分析其抗电化学腐蚀能力 ,研究固溶冷却速度对合金抗蚀性能的影响。利用透射电镜分析固溶冷却速度对合金微观组织的影响。试验发现在该合金固溶过程时 ,降低冷却速度可使合金时效后的抗应力腐蚀和抗电化学腐蚀性能提高 ,合金基体组织中析出的δ′相减少、尺寸增大。
During the solution-aging treatment of 1420 Al-Li alloy,four different mediums including room temperature water,quenching oil,moving air and still air in furnace were used to produce different cooling rate.TEM investigation on the microstructures of 1420 alloy after quenched at different cooling rate shows that the number and the size of the δ′ precipitates increase with the cooling rate decrease.After aging treatment,the corrosion and stress-corrosion properties of 1420 Al-Li alloy were studied by means of three-point-bending constant strain method and anodic polarization analysis.The results show that the corrosion and stress-corrosion properties of the treated alloy are improved by decreasing the cooling rate during solution-aging treatment.
出处
《金属热处理》
CAS
CSCD
北大核心
2004年第5期32-34,共3页
Heat Treatment of Metals
