Effect of cutting fluids on corrosion properties and turning surface quality of Fe-based superalloy
Effect of cutting fluids on corrosion properties and turning surface quality of Fe-based superalloy
复制标题
切削液对铁基高温合金腐蚀性能及车削表面质量的影响
DOI：
10.1177/1687814017730534
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发表时间：
2017-11-19
影响因子：
2.1
通讯作者：
Rong, Yiming
中科院分区：
文献类型：
--
作者：
Zhu, Junyi;Yan, Pei;Rong, Yiming
汽轮机转子工作在高温、高压、高速、载荷等极端条件下，对材料性能和加工表面质量提出了更高的要求。铁基高温合金是汽轮机转子中广泛使用的一种典型的难切削材料，在其加工过程中需要切削液。然而，由于切削液的使用不当，发生了许多事故。切削液对材料特性和物理机械性能的影响不容忽视。本文通过实验研究了切削液对典型转子材料腐蚀性能和车削表面质量的影响。研究了加工表面的Tafel曲线、电化学阻抗谱、表面形貌和残余应力。结合两种切削液的物理化学性质对结果进行了解释。结果表明，切削液对铁基高温合金的腐蚀性能和加工表面质量有明显影响。长时间接触切削液后，材料表面可能被腐蚀。切削液的润滑性能对表面形貌和残余应力有很大的影响，从而影响产品的使用寿命和表面性能。
As the steam turbine rotor works in extreme conditions of high temperature, pressure, speed, and load, better material performance and machined surface quality are highly demanded. Fe-based superalloy is a kind of typical difficult-to-cut material that is widely used as steam turbine rotors, and cutting fluid is necessary during its machining process. However, many accidents occurred for the misuse of cutting fluids. The effect of cutting fluids on material characteristics and physical mechanical properties cannot be ignored. In this article, an experimental research was taken on the effect of cutting fluids on corrosion property and turning surface quality of a typical rotor material. Tafel curves, electrochemical impedance spectroscopy, surface morphology, and residual stress of machined surfaces were investigated. The results were explained integrating with physical and chemical properties of two cutting fluids. It indicated that the cutting fluid had an obvious effect on the corrosion property and machined surface quality of Fe-based superalloy. The material surface may be corroded after long-time exposure to cutting fluids. The lubricating property of cutting fluids has a great effect on surface morphology and residual stress, which may affect product lifetime and surface performance.