The test method of RF impedance of bonding strap based on the sweep frequency/T type insertion loss principle is analyzed.

The test results of 27 specimens show that the bearing capacity of lapped continuous battens is related to the stiffness of overlapping part,bending moment,effective section modulus and so on.

Therefore,it is uneconomic to increase the ultimate load capacity of lapped continuous battens only by increasing the lap length.

The effects of the freezing rate of laser molten pool,secondary-heating affect and fusant convection in multirun overlapping on the microstructure,component and property of cladding layer were analyzed.

The mathematical model of overlapping between the circumferential cutting edge and major cutting edge of the ball nose endmilling cutter with indexable inserts is established, with which the profile errors of cut surface around the overlapping point can be calculated and controllable parameters for the shape modification of circumferential cutting edge can be determined.

WT5”BZ]This paper deals with the calculating method for the effective heat utilization of laser during the broad beam overlapping,the microstructure features of overlapping cladding layer and the convection mechanism,which was used to explain the variation of the microstructure and the distribution of alloys in different areas.