Abrasive wear resistance of the iron- and WC-based hard faced coatings evaluated with scratch test method

Abstract

Abrasive wear is one of the most common types of wear, which makes abrasive wear resistance very important in many industries. The hard facing is considered as useful and economical way to improve the performance of components submitted to severe abrasive wear conditions, with wide range of applicable filler materials. The abrasive wear resistance of the three different hard faced coatings (two iron-based and one WC-based), which were intended to be used for reparation of the impact plates of the ventilation mill, was investigated and compared. Abrasive wear tests were carried-out by using the scratch tester under the dry conditions. Three normal loads of 10, 50 and 100 N and the constant sliding speed of 4 mm/s were used. Scratch test was chosen as a relatively easy and quick test method. Wear mechanism analysis showed significant influence of the hard faced coatings structure, which, along with hardness, has determined coatings abrasive wear resistance.