Comparison of c - scan of entire sample and the date of local point a - scan collected and processed with the metallorgaphs of sample cross section showed that the method could be used to determine the spot size of resistance spot welding 對(duì)接頭焊點(diǎn)的c掃描及對(duì)局部點(diǎn)的a掃描信號(hào)的采集與分析,經(jīng)負(fù)際焊點(diǎn)橫截面的金相觀察對(duì)比,可以較準(zhǔn)確確定點(diǎn)焊的焊核直徑。