Effect of New Hard Facing Materials of Tillage Tools on Draftand Roughness

摘要

Tillage consumes a large amount of energy because of the high draft requirements. Thus, the importance of soil-metal sliding action is an important factor, which consumes energy. The control of soil movement on the tillage tool is a major desired action. Also, the kind of surface governs the bath of movement of the soil. The adhesion between the tool surface and the soil is greater than that of the cohesion. Thus, the main objectives of this investigation are to determine the draft required for a simple tillage tool produced from different types of steel API 52, Kl 10 and M238 which were treated with different treatments. The effect of these different treatments on the share hardness was tested and evaluated. Results showed that the draft requirements of coated shares by carbon nanotube-hard chromium composite were less than that of untreated shares by about 43.92%, 44.14 %, and 38.02 % respectively. Also, it was found that hardness was improved by coating with carbon nanotube-hard chromium composite CNT+HCR which gave the highest value for hardness compared to other treatments. On the another hand, the lowest value of surface roughness was obtained in carbon nanotube-chromium composite treatment after tillage of 200 hours followed by hard chromium treatment in all type of steel.