Wear performance of laser surface hardened GCr15 steel |
| |
Authors: | Sheng Lei Quankun Liu Yuping Ma Jingming Ren |
| |
Affiliation: | (1) Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai, 600 036, India; |
| |
Abstract: | In order to assess the new tribological properties of laser surface hardened GCr15 steel, the wear resistance between specimens
treated with laser and those of conventionally hardened under dry sliding conditions was compared. The change of wear mechanisms
in laser hardened GCr15 resulted in a distinct difference in wear rates. The results showed that quenched zones not only had
sufficient depth of hardening and higher hardness, but had more retained austenite and finer carbides because of a higher
degree of carbide dissolution. Laser surface hardened GCr15 steel specimens exhibited superior wear resistance to their conventionally
hardened specimens due to the effects of the microstructure hardening, high hardness and toughness. The wear mechanism for
both the laser quenched layer and conventionally hardened layer was highly similar, generally involving adhesive, material
transfer, wear-induced oxidation and plowing. When conventionally hardened block specimens rubbed against the laser hardened
specimens, the surface of conventionally hardened block specimens was polished. The microstructural thermal stability was
increased after laser surface treatment. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|