| 摘要 |
PURPOSE:To manufacture easily a lead pin with a spherical brazing filler metal with which stable and high brazing strength is obtd. by making the brazing filler metal into a spherical shape and joining the sphere thereof to the lead pin at a specific temp. CONSTITUTION:A brazing filler metal consisting essentially of Ag, Au, Cu, Pd, Ni, etc. is made into a fine wire 3 which is cut to manufacture a granular piece 4. The pieces 4 are arrayed on a carbon tray and are melted by heating in a furnace kept under a non-oxidizing atmosphere. The molten pieces are solidified to obtain spheres 5 of tie brazing filler metal. A lead pin 8 is inserted into the hole 7 of a carbon jig 6 and the sphere 5 of the brazing filler metal is set at the top end thereof. The jig 6 is heated to the temp. higher than the solidus line temp. of the brazing filler metal and lower than the liquidus line temp. in the furnace kept under the non-oxidizing atmosphere and is then cooled. The sphere 5 of the brazing filler metal is securely joined to the pin 8. |
