Abstract:The microstructure of QCr0. 8 and 1Cr21Ni5Ti joint by electron beam welding was analysed and in鄄
vestigated. Compared with the joint which formed without interlayer,the joint based Ni slice interlayer had a transition zone where the microstructures and elements distribution changed by degrees. As a result,the mechanical properties of QCr0. 8 /1Cr21Ni5Ti EBW joint are improved.