摘要
利用电爆炸方法 ,研制了高速喷涂金属涂层的装置。提出了脉冲加热电流的简化计算公式 ,并将理论值和实测结果进行了比较。以 1Cr18Ni9Ti钢为喷涂原料进行了高速喷涂实验。实验表明 ,涂层的平均晶粒直径小于 10 μm。当电容器初始电压高于某一值时 ,涂层与基体结合面处形成了比涂层晶粒尺寸更为细小的过渡层。涂层的硬度值与喷涂前的原始硬度值相比显著提高。
By electrical explosion method,a new device developed was used to spray gasified metal with a very high speed on base metal surface.Simplified equations were derived to estimate pulse heating currents.Calculated and measured currents were compared. Tested alloy was 1Cr18Ni9Ti stainless steel.Average coat grain diameter was refined from 26μm to less than 10μm.When initial capacitor voltage was higher than certain levels,a transition layer of rapid solidification between coat and base metal appeared whose crystal sizes were much smaller than that of coat.The hardness values of coats were much higher than that of the original.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2001年第1期17-20,共4页
Explosion and Shock Waves
基金
国家自然科学基金项目! (1970 2 0 0 3)
关键词
电爆炸
冲击加热
快速凝固
高速喷涂
electric explosive
impulse heating
rapid solidification
high speed spraying€
