The spring contact finger of beryllium bronze was prepared with TIG by lapping welding form

and microstructure and properties of the samples were investigated comprehensively.The experimental results indicate that the welding point microstructure is similar with that of the matrix

and the tensile strength reaches about 800 MPa

being 93% of the matrix

meanwhile

the hardness is about 420 HV

being equivalent with those of the matrix.In addition

the electron resistivity is about 0.069 9×10-6Ω·mm2/m

which is superior to that of the matrix.