Han Xue, Zhang Zhenpu, Barber Gary C, Thrush Steven J, Li Xin
Key Laboratory of Automobile Materials of Ministry of Education, School of Materials Science and Engineering, Jilin University, Renmin Street No. 5988, Changchun 130025, China.
Automotive Tribology Laboratory, Department of Mechanical Engineering, School of Engineering and Computer Science, Oakland University, Rochester, MI 48309, USA.
Materials (Basel). 2021 Apr 16;14(8):2015. doi: 10.3390/ma14082015.
In this research, the tribological properties of different microstructures of medium carbon steel produced by either an austempered process or quenched-tempered process are investigated. The as-received samples with annealed microstructure (spherodized) are austempered to obtain a bainite microstructure or quenched-tempered to obtain a tempered martensite microstructure. The tribological performance of these microstructures was studied using a ball-on-disk UMT3 tribometer. The results indicated that both bainite microstructures and tempered-martensite microstructures produced better wear resistance than pearlite microstructures. At the same hardness level, the austempered disk specimens have less cracking due to higher fracture toughness compared to quenched and tempered steel. For the disks, tempered martensite microstructures produced more plastic deformation compared with bainite microstructures. Mild abrasive wear was observed on the harder disks, however, smearing wear was observed on the softer disks. Adhered debris particles were observed on the balls.
在本研究中，对通过等温淬火工艺或调质工艺生产的中碳钢不同微观结构的摩擦学性能进行了研究。将具有退火微观结构（球化）的原始样品进行等温淬火以获得贝氏体微观结构，或进行调质以获得回火马氏体微观结构。使用UMT3球盘摩擦磨损试验机研究了这些微观结构的摩擦学性能。结果表明，贝氏体微观结构和回火马氏体微观结构均比珠光体微观结构具有更好的耐磨性。在相同硬度水平下，与调质钢相比，等温淬火盘状试样由于具有更高的断裂韧性而产生的裂纹更少。对于盘状试样，回火马氏体微观结构比贝氏体微观结构产生更多的塑性变形。在较硬的盘状试样上观察到轻微的磨粒磨损，然而，在较软的盘状试样上观察到涂抹磨损。在球上观察到附着的碎屑颗粒。
