表面涂层对非晶薄带爆炸焊接温度影响探讨  

Influences of coating materials on temperature of amorphous foils during explosive welding

作　　者：孙宇新[1,2] 付艳恕[1] 王晓萍[1] 

机构地区：[1]南京理工大学瞬态物理国家重点实验室,江苏南京210094 [2]中国科学技术大学近代力学系,安徽合肥230026

出　　处：《爆炸与冲击》2008年第4期350-354,共5页Explosion and Shock Waves

基　　金：国家自然科学基金项目(10402041)

摘　　要：针对在非晶薄带爆炸复合制备块体非晶复合材料过程中涂层对温度的影响，提出对非晶薄带实施涂层后再进行爆炸复合。利用放缩法将涂层后的薄带简化为均匀材料，并对30μm厚的Fe78B13Si9非晶涂层前、后爆炸焊接层内温度场进行系列分析计算，表明：（1）高速撞击产生的热量主要集中在涂铜层上,涂层处理能够显著减小界面撞击引起的热影响区域；（2）相对于非涂层的非晶爆炸复合，文中方案平均温升降低约280K；（3）铜涂层后。碰撞界面冷却速率高达10^7K／s。研究表明，具有表面涂层的非晶薄带在爆炸复合制备层合块体非品复合材料过程中，能够更好地保持非品材料的非晶结构，并有效扩大爆炸焊接窗口。A new method of coating another metals at the interfaces of amorphous foils before explosive welding was propsoed to explore the influences of coating materials on temperature of amorphous foils during explosive welding. The coated amorphous foils were simplified as homogeneous materials by scaling the heat-conduction coefficient to analyze the temperature field at the explosive welding interfaces of the uncaoted and coated Fe78B13Si9 amorphous foils with the thickness of 30μm. Combined with the square wave model of the temperature field, a one-dimensional heat-conduction equation was developed and the initial and boundary conditions were obtained. Comparisons of the temperature distributing curves show as follows： （1） in the coated system, the energy of plastic collision is concentrated in the coating layer and the heat-affected zone can be remarkably minimized; （2） the average temperature rise in the coated systems is about 280 K lower than that in the uncoated system; （3） the cooling rate after plating copper is up to 107 K/s. Researched results indicate that the Fe-based bulk metallic glasses in the coated amorphous foils can be protected and the explosive welding windows are effectively enlarged.

关 键 词：爆炸力学 冷却速率 涂层 爆炸层合非晶板 防护材料 

分 类 号：O389[理学—流体力学] TG456.6[理学—力学]