| This study has been carried out to investigate into some effects of single or multi addition of alloying elements and surface hardening treatment in order to increase the properties of wear resistance of gray cast iron during enlubricated dry sliding wear test. The results obtained from this study are as follows, 1. In the as-cast, gray cast iron alloyed with Cr, Mo, Mo-Cr, Mo-Cr-Cu, and Mo-Cr-Ni in additional sequence has shown fine pearlitic structures, decreased ferritic fraction and increased the hardness and the properties of wear resistance. 2. In the case of surface hardening treatment to gray cast iron alloyed with Cr, Mo, Mo-Cr, Mo-Cr-Cu and Mo-Cr-Ni in additional sequence has been shown to increase the surface hardness. The depth of hardened layer and the properties of wear resistance decreased the deviation of the wear rate with the addition of the alloying elements, as compared to as-cast. 3. The surface hardening treated specimens have removed the peak point toward the high speed direction and d creased the wear loss, as compared to as-cast, wear loss has decreased as the hardness values increased at the peak point. |
|
