摘要
目的在KCJ-15型扬雪机搅笼NiCrBSiC合金涂层的基础上,添加硬质碳化钨颗粒,并研究其在搅笼基体上的腐蚀、磨损规律。方法制备7组碳化钨颗粒含量不同的镍基复合粉末,分别在不同腐蚀液体中进行摩擦磨损实验,随后选取抗磨性能最佳的一组,分别进行不同载荷和不同滑动速度下的摩擦磨损试验。结果在同一种腐蚀液体中,喷熔层的摩擦系数随碳化钨含量的增加变化不大,磨损率随碳化钨含量的增加先减小后增大,其中浸泡在HCl和NaCl溶液中的试块喷熔层的摩擦系数和磨损率普遍偏高,而浸泡在NaOH和H_2SO_4溶液中的试块喷熔层的摩擦系数和磨损率普遍偏低。随着载荷的增加,喷熔层的摩擦系数和磨损率增大。随着滑动速度的增加,喷熔层的摩擦系数增大,磨损率降低。结论在KCJ-15型扬雪机搅笼NiCrBSiC合金涂层中,添加碳化钨的最佳质量分数在15%~25%之间,此时可获得最佳的抗磨性能。此外,喷熔层的摩擦系数受到腐蚀液体、外部载荷和滑动速度的影响较大,受碳化钨含量的影响较小。
The work aims to study corrosion and wear law of NiCrBSiC/WC spray-fused composite coating of KCJ-15 snow lifting mixer. 7 groups of NiCrBSiC/WC composite powder with different WC mass fractions were prepared, and frictional wear experiments were carried out in different corrosive liquids. Then a group exhibiting best wear resistance was selected for frictional wear experiments under different load and at different sliding speed. In the same kind of corrosive liquid, friction coefficient of the spray-fused coating changed slightly with the increase of WC content, and the wear rate first decreased and then increased with the increase of WC content. The friction coefficient and wear rate of test block spray-welding coating soaked in HCl and NaCl solutions were generally high, while those of test block spray-welding coating soaked in NaOH and H2SO4 solutions were generally low. The friction coefficient and wear rate of spray-welding coating increased with the increase of load. The friction coefficient increased and the wear rate decreased with the increase of sliding speed. When the WC content is between 15% and 25%, the best wear resistance can be obtained on NiCrBSiC alloy coating of KCJ-15 snow lifting mixer. The friction coefficient of the spray-fused coating is greatly influenced by corrosive liquid, external load and sliding speed, and slightly affected by WC content.
出处
《表面技术》
EI
CAS
CSCD
北大核心
2017年第5期106-110,共5页
Surface Technology
基金
空军勤务学院青年科学基金(KY2014F048B)~~
