电子束钎焊的能量密度控制方法  

STUDY ON ENERGY DENSITY CONTROL METHOD OF ELECTRON BEAM WELDING

作　　者：王学东[1] 李少青[1] 姚舜[1] 

机构地区：[1]上海交通大学,200030

出　　处：《焊接》2005年第6期21-24,共4页Welding & Joining

摘　　要：基于电子束扫描轨迹和方式控制,提出了电子束钎焊能量密度控制方法及能量密度计算方法,以扫描电子束作为移动热源,电子束扫描轨迹和扫描方式根据钎焊接头的形状及要求设计,通过控制扫描点在工件加热区域的分配,可对接头各区域进行能量密度的高精度控制,在工件表面获得所需要的能量密度分布;也可以对异种金属电子束焊接进行能量输入比可调的不对称能量输入控制,可有效地控制接头两侧异种金属的熔化量,使接头两侧异种金属以适当的比例熔合。Based on electron beam scanning track and mode control, the energy control method and energy density computation method used in EBW was putted forward, in which the scanning electron beam was used as heat source, and the electron beam scanning track and scanning mode were designed according to the shape and requirements of the welded joint, through the assignment of the scanning spots on the heating area of the workpiece, the high precision energy density control could be realized and any energy density distribution which was needed could be acquired. Using this method, the asymmetric energy input used in dissimilar metal welding could be realized and the ratio of the energy input could be adjusted, to control the melting amount of the dissimilar metals on each side of the joint effectively, so appropriate proportion of the dissimilar metals on each side of the joint could be fused to make the chemical constitution and performance met the requirements.

关 键 词：能量密度 控制方法 异种金属 扫描轨迹 高精度控制 电子束焊接 计算方法 移动热源 钎焊接头 扫描方式 密度分布 工件表面 输入控制 能量输入 加热区 不对称 熔化量 

分 类 号：TG457.1[金属学及工艺—焊接] O441.4[理学—电磁学]