In this paper,temperature distribution of PBGA component during laser reflow process of solder ball was simulated with finite element method,and effects of different heating means of laser on temperature distribution were discussed in detail.

Properties and welding interface characterization of new-type Au-Ag-Ge brazing alloy;

The results indicate that the base metal, 60wt%BNi2+40wt%BNi5 brazing alloy and BNi2 brazing alloy is with similar passivation current, but the initial passivation potential is increased in turn, which demonstrates that their corrosion resistance is decreased in the same sequence.

The vacuum brazing process of 5CrMnMo steel and YG8 hard metal were studied by using CuMnNi filler metal.

The filler metals and fluxes suitabled for 2A50 aluminum alloy brazing were selected according to the feature of 2A50 aluminum alloy and the test of spreadability and clearance fillabitity.

Wettability of two kinds of Pd-Ni brazing filler metals on Si_3N_4 ceramic;

Wettability of Au-Ag-Si brazing filler metal series with Ni;

The vacuum brazing of 40Cr steel to hard alloy YG8 with CuMnNi brazing filler metal is investigated.

Development of solders for aluminum brazing;

Effect of adding Bi element on Sn3.5Ag eutectic alloy solder;

Properties and interface microstructure of new type Ag-Cu-Ge solder;