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A novel low temperature and green salt bath nitriding of titanium alloy
Surface Engineering ( IF 2.8 ) Pub Date : 2021-09-24 , DOI: 10.1080/02670844.2021.1979841
Yan Song Zhu 1, 2, 3 , Xing Nong Wei 1 , Yu Xuan Yin 1
Affiliation  

ABSTRACT

A novel low temperature and green salt bath nitriding of TC4 titanium alloy was developed by adding a certain amount of K2SO4 in the KNO3 and NaNO3 salt bath. The results show that compared with as-received TC4 alloy, the surface hardness and tribological properties of the nitrided titanium alloy were greatly improved. Furthermore, based on the theoretical and experimental analysis of the effects of the K2SO4 on the inhibition of the cyanide in the nitriding salt bath and tribological properties of the nitrided samples, wonderful discoveries were obtained. The tribological properties of the nitrided samples were dominated by not only the surface hardness but also the subsurface hardness. Moreover, there exists an optimum value for K2SO4 addition (about 1 wt-%): K2SO4 can not only effectively inhibit cyanide production but also cause the hardness in the nitride layer subsurface to further be improved, resulting in the further enhancement of the tribological properties.



中文翻译:

一种新型钛合金低温绿盐浴渗氮

摘要

通过在KNO 3和NaNO 3盐浴中加入一定量的K 2 SO 4,开发了一种新型TC4钛合金低温绿盐浴氮化。结果表明,与原样的TC4合金相比,氮化钛合金的表面硬度和摩擦学性能有了很大的提高。此外,基于 K 2 SO 4影响的理论和实验分析对氮化盐浴中氰化物的抑制作用和氮化试样的摩擦学性能,得到了很好的发现。渗氮样品的摩擦学性能不仅受表面硬度支配,而且受次表面硬度支配。此外,K 2 SO 4 的添加量存在一个最佳值(约1wt-%):K 2 SO 4不仅可以有效抑制氰化物的产生,而且还可以进一步提高氮化层次表面的硬度,导致进一步提高摩擦学性能。

更新日期:2021-11-23
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