the microhardness distribution of the welded joint is along the welding line. the microhardness is higher in nugget zone, and lowest in haz.
焊接接头的硬度分布沿焊缝中心基本对称,焊核区硬度较高,热影响区硬度最低。
by sem, xrd and microhardness tester, the microstructure, phase structure and microhardness distribution of vacuum sintered ni60 alloy coating were investigated.