Effect of Heat Treatment on Creep Behavior of Fe-based Amorphous Coatings

Author of the article:ZHAI Haimin, MA Xu, ZHANG Xinjian, CHENG Bo, HE Dongqing, LI Wensheng

Author's Workplace：State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals, Lanzhou University of Technology

Key Words： Fe-based amorphous coating; heat treatment; nanoindentation; creep behavior

Abstract：The Fe-based amorphous coating was prepared by detonation sprayed and the coating was insulated at 300, 400
and 500 ℃, respectively. Then the influence mechanism of the holding temperatures on the nanoindentation creep behavior
of the amorphous coating was studied. The experimental results show that heat treatment can significantly reduce the
porosity of the coating, make the coating structure more compact, and therefore have a higher microhardness; compared
with the low temperature heat treatment at 300 ℃, the iron-based amorphous coating after heat treatment at 500 ℃has a
denser structure and a more uniform hardness distribution, making the creep stress index significantly increased from 15.4
of the initial coating to 36.7, indicating that heat treatment can significantly increase the creep resistance of the Fe-based
amorphous coating.