基于正交试验法的钎焊各参数对石墨连接的影响  

Effect of Brazing Welding Parameters on Graphite Connection Based on Orthogonal Test

作　　者：高忠峰 蒋毅 GAO Zhongfeng;JIANG Yi(Jiangsu Province Key Laboratory of Advanced Food Manufacturing Equipment and Technology,School of Mechanical Engineering,Jiangnan University,Wuxi 214122,China)

机构地区：[1]江南大学机械工程学院江苏省食品先进制造装备技术重点实验室,江苏无锡214122

出　　处：《热加工工艺》2020年第13期6-9,共4页Hot Working Technology

基　　金：国家自然科学基金面上项目(51675233)。

摘　　要：对高强石墨使用Ti+Ni体系焊料进行真空炉钎焊烧制后,其焊料溢出面积与三点弯曲力矩对高强石墨电极整体性能有一定的影响。这两个因素主要受焊接压力、液压压力、焊料质量和焊料孔深度这个四个参数影响,因此对这四个参数进行正交试验法分析。结果表明焊接压力为15 N,液压压力为2.5 N,焊料质量为0.08 g,石墨孔深度为1.0mm,烧制后得到的溢出面积为0.72 mm^2,此时的溢出面积小于正交试验结果;在液压压力为2.0 N时,焊接压力15 N,焊料质量为0.10 g,石墨孔深度为1.0 mm,此时的三点力矩为13.5 N·m。最后用XRD测定分析了最佳力矩下的界面结构产物,主要是在真空和高温下形成的TiC。After the high strength graphite is brazed and sintered by using Ti+Ni system solder in vacuum furance, its overfolw area of solder and three-point bending moment have some influence on the overall properties of high strength graphite electrode. These two factors are mainly affected by the four parameters of welding pressure, hydraulic pressure, solder quality and solder hole depth. Therefore, the four parameters were analyzed by orthogonal experimental method. The results show that when the welding pressure is 15 N, the hydraulic pressure is 2.5 N, the solder quality is 0.08 g, the graphite hole depth is 1.0 mm, the overflow area obtained after sintering is 0.72 mm^2, which is smaller than the result of orthogonal experiment. When the hydraulic pressure is 2.0 N, the welding pressure is 15 N, the solder quality is 0.10 g, the graphite hole depth is 1.0 mm, the three-point torque is 13.5 N·m at that moment. Finally, the interface structure tested by XRD under the optimal moment is Ti C which is formed under the vacuum and high temperature environment.

关 键 词：高强石墨 溢出面积 三点弯曲力矩 正交试验 

分 类 号：TG454[金属学及工艺—焊接]