Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1573077 | Materials Science and Engineering: A | 2016 | 12 Pages |
Abstract
A multiphase microstructure composed of nano-scaled bainite, martensite, undissolved spherical carbides and retained austenite was obtained on the top surface of carburizing 23Cr2Ni2Si1Mo steel after low-temperature austempered at 200 °C, with a dual-phase microstructure of fine martensite lath and carbon-enriched retained austenite in the center of steel. As compared with the conventional oil quenching and tempering (OQ) state, the low-temperature austempering specimens showed a higher surface residual compressive stress and a thicker residual compressive stress layer, and the wear resistance of the top surface of specimens austempered for 4 h, 8 h and 24 h was increased 40%, 58% and 12%, respectively. Moreover, the impact toughness of the center of these austempered specimens is also improved 20.8-33.3% as compared with that of the OQ specimen. Then, it can be deduced that applying the low-temperature austempering treatment for manufacturing carburizing-steel part is beneficial to improving its service performance for the better stress condition, higher wear resistance and higher interior toughness.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Yanhui Wang, Zhinan Yang, Fucheng Zhang, Dongdong Wu,