Investigation into Wear Characteristics of Tungsten Carbide under Different Lubricating Conditions

Pin-on-disc wear tests of tungsten carbide inserts at different conditions of pin setting is carried out with loads of 2kg, 4kg, 6kg and 8kg.speeds of 800rpm, 1200rpm, 1600rpm, 2000rpm. Two type of pin setting is used with first type the insert is set in direct contact with the disc throughout the whole testing cycle. In the second type the insert is set with an angular setting with the disc at the beginning of the wear test, but later it got converted into direct contact. Then bio- lubricant i.e canola oil is used during testing. The ratio of these two wear values was found to be an important parameter. The turning distance is obtained from the diameter of the work piece and its rotational speed. It is found that with same testing parameters the wear value of the insert with an initial angular setting is significantly lower than those obtained with insert that is at full contact with the disc throughout the testing cycle. This work is therefore provided a significant new insight into the discrepancy of the wear values obtained previously by the turning methods and those by the standard pin-on-disc testing methods.