![]() ![]() Under large forces, the main failure mechanism was spallation. Under small forces, an adhesion layer derived from the wear debris was formed on the coating surface to reduce the wear at the beginning of the test, after that the main failure mechanism was abrasive wear and delamination. For the CrN coatings, they had longer service life under smaller normal forces than under the large forces. The wear depths were small when the coatings worked and then increased with the number of cycles and the normal forces. The wear depths of coated samples were smaller than those of uncoated substrates. The CoFs of CrN fluctuated during the wear process, while CoFs of AlTiN coatings were closer to those of the uncoated substrates. The results indicated that the bonding strength of coatings to the WC-Co substrate were larger than those to the HSS substrate. Then, the coating service life maps were established and the factors affecting the coating life were explored. The wear mechanism was explored based on the analysis of coefficient of friction (CoF), wear and damage of coating. The sliding wear and failure behaviors of CrN and AlTiN coatings on high speed steel (HSS) and cemented carbide (WC-Co) were investigated on a reciprocating test machine under different normal forces (30–120 N).
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |