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热处理对 Fe 基非晶涂层蠕变行为影响的研究
Effect of Heat Treatment on Creep Behavior of Fe-based Amorphous Coatings
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- DOI:
- 作者:
- 翟海民，马 旭，张辛健，成 波，何东青，李文生
ZHAI Haimin, MA Xu, ZHANG Xinjian, CHENG Bo, HE Dongqing, LI Wensheng
- 作者单位:
- 兰州理工大学 省部共建有色金属先进加工与再利用国家重点实验室
State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals, Lanzhou University of Technology
- 关键词:
- 铁基非晶涂层；热处理；纳米压痕；蠕变行为
Fe-based amorphous coating; heat treatment; nanoindentation; creep behavior
- 摘要:
- 通过爆炸喷涂制备了 Fe 基非晶涂层，并在 300 、 400 及 500 ℃ 分别进行了保温处理并研究了保温温度对非
晶涂层纳米压入蠕变行为的影响机制。 结果表明，通过热处理可以明显降低涂层孔隙率，使得涂层组织结构更加致密，
也因此具有更高的显微硬度；相比 300 ℃ 低温热处理， 500 ℃ 热处理后的铁基非晶涂层中组织更加致密、硬度分布更加
均匀，使得蠕变应力指数由初始涂层的 15.4 明显增加至 36.7 ，表明通过热处理可以明显增加铁基非晶涂层蠕变抗力。
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.