CHEN Kangmin, WANG Lan, WANG Shuqi*, WEI Minxian

(School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China)

Abstract: Dry sliding wear tests were performed for a H13 steel at room temperature (RT), 200 and 400 ℃ as well as various loads on a pin-on-disk wear tester. The wear behavior and mechanisms under various testing conditions were studied. The results show that the wear rate of H13 steel increased in a sequence of 200℃, RT, 400 ℃. At room temperature, wear rate increased with the increasing load and adhesive wear prevailed due to inadequate tribo-oxide on the worn surface. At 200℃,increasing load from 50 to 100 N reduced the wear rate due to the formation of tribo-oxide layer on worn surfaces. As the load increased from 100 to 200 N, wear rate slightly increased, and was substantially lower than that at RT and 400 ℃. In this case, mild oxidative wear prevailed. At 400 ℃, the wear rate increased with the increasing load This is the result of load induced plastic deformation or/and thermal softening, and delamination. At a load higher than 150 N, the wear rate of H13 steel rapidly increased and severe wear occurred. The wear mechanism was oxidative wear and plastic extrusion.

Key words: H13 steel; high temperature oxidation; tribo-oxide; wear mechanism

E-mail: huqi_wang@ujs.edu.cn 

Tribology, Vol. 31, Issue 4, 2011, 317~322