|
Vol.38, No.2, 278 ~ 285, 2000
|
| Title |
| Pesearch Paper / Mechanical Behavior : Effects of Tempering Temperature on High - Temperature Wear Properties of a High Speed Steel Roll |
| 이정호Jung Ho Lee,오준철Jun Cheol Oh,박준욱Joon Wook Park,이희춘Hui Choon Lee,이성학Sung Hak Lee |
|
|
|
| Abstract |
| This study is concerned with the effects of tempering temperature on wear properties and surface roughness of a high speed steel (HSS) roll manufactured by centrifugal casting method. Hot-rolling simulation test was carried out using a high-temperature wear tester capable of controlling speed, load, and temperature. The test results revealed that the peak-tampered roll specimen showed the best wear resistance because it contained a hard matrix. However, its surface roughness deteriorated as the scratching wear proceeded, thereby leading to increase in friction coefficient. In the over-tempered specimens containing a number of fine spherical carbides in the matrix, the abrasive wear occurred predominantly as fine carbides were fallen off from the worn surface, and thus the surface roughness was enhanced by more homogeneous wear of matrix and carbides. These findings suggested that over-tempering would be more desirable in order to improve wear resistance with consideration of the surface roughness of the HSS roll. |
|
|
| Key Words |
|
|
 |
|
