STRENGTHENING AND WEAR RESISTANCE OF Ni-Fe-Cr-B-Si SPRAY ALLOY COATING BY SUPERPLASTICAL DIFFUSION WELDING
LI Yanxiang;WEN Jiuba;ZHU Yaomin(Luoyang Institute of Technology; Luoyang471039); HUANG Jinliang (Xi'an Jiaotong University; Xi'an 710049)(Manuscript received 1995-07-11)
Cite this article:
LI Yanxiang;WEN Jiuba;ZHU Yaomin(Luoyang Institute of Technology; Luoyang471039); HUANG Jinliang (Xi'an Jiaotong University; Xi'an 710049)(Manuscript received 1995-07-11). STRENGTHENING AND WEAR RESISTANCE OF Ni-Fe-Cr-B-Si SPRAY ALLOY COATING BY SUPERPLASTICAL DIFFUSION WELDING. Acta Metall Sin, 1996, 32(5): 538-543.
Abstract The structural analysis and tests of hardness and wear resistance of Ni-Fe-Cr-B-Si coating indicated that the original coating particles and the interfaces between coating and substrate were readily jointed if the substrate of 5CrMnMo steel together with coating deformed superplastically. The hardness of the superplastical diffusion welded coating may be superior to that of high frequency induction or spray remelted coatings up to 100-150%, and wear resistance up to 30%. It is seemed that the major factors of the improvement of the strengthening and wear resistance of the coating welded may be precipiation hardening, fine grained structure and increasing in internal dislocation density.