Tribological Behaviors and Lubrication Mechanism of Water-based MoO3 Nanofluid during Cold Rolling Process
Tribological Behaviors and Lubrication Mechanism of Water-based MoO3 Nanofluid during Cold Rolling Process
复制标题
水基MoO3纳米流体冷轧过程中的摩擦学行为及润滑机制
DOI：
10.1016/j.jmapro.2020.11.044
复制
发表时间：
2021-01-01
影响因子：
6.2
通讯作者：
Zhang, Boming
中科院分区：
文献类型：
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作者：
Sun, Jianlin;Meng, Yanan;Zhang, Boming
MoO3纳米流体是通过将去离子水与MoO3纳米粒子和一些其他有机添加剂混合来制备的。采用四球摩擦测试仪测试了不同纳米颗粒浓度下制备的 MoO3 纳米流体的摩擦学行为。结果表明，纳米MoO3在水中的分散有利于降低摩擦系数和磨损体积，提高承载能力，特别是添加剂的最佳浓度为0.4wt.%。为了研究水基MoO3纳米流体在钢材冷轧条件下的润滑机理，利用四辊轧机评价了0.4 wt.% MoO3纳米流体在水基流体中的冷轧润滑性能。轧制输出，例如轧制力、轧制功率和压下量，被用作确定工艺效率的测量参数。钢材冷轧过程中发现发生冲蚀腐蚀，MoO3转变为MoO2，铁被氧化成氢氧化铁。由于MoO3的化学吸附和沉积，带材表面形成了由MoO3、MoO2和Fe(OH)(3)组成的润滑膜。
The MoO3 nanofluid was prepared by mixing deionized water with MoO3 nanoparticles and some other organic additives. The tribological behaviors of prepared MoO3 nanofluid in various nanoparticle concentrations were tested by four-ball tribotester. The results obtained therein revealed that the dispersion of the nano-MoO3 in water was conducive to the reduction of friction coefficients and wear volume, and the increase in the loadbearing capacity, especially the optimal concentration of additive was 0.4 wt.%. To investigate the lubrication mechanism of water-based MoO3 nanofluid under steel cold rolling condition, cold rolling lubrication performance of 0.4 wt.% MoO3 in water-based fluid was evaluated using a four-high rolling mill. The rolling outputs such as rolling force, rolling power and reduction were used as measurands for determining the process efficiency. Erosion corrosion was found to happen during steel cold rolling process, MoO3 was transformed to MoO2 and iron was oxidized to iron hydroxide. A lubricating film composed of MoO3, MoO2 and Fe(OH)(3) was considered to form on strip surfaces due to chemisorption and deposition of MoO3.