Two dimensional wear is also considered as surface wear. At this time, the wear mainly occurs on a two-dimensional plane, which mainly describes the wear mechanism on the two-body friction and wear surface. The characteristic of the two-body pin disk wear test is that the pin sample moves relatively parallel to the disk sample, and the wear amount of the test is low, and the shape variable of the material wear surface is small, which is very suitable for stripping away from the normal impact or displacement of the wear surface. The comparison shows the wear behavior of bainite Martian composite wear-resistant cast steel and mnl3cr2 on the two-dimensional plane.
In the figure, the wear morphology of the two experimental steels after the two-body pin disc wear test is observed by SEM. It can be seen from figure a that the wear morphology of bainite Martian multiphase wear-resistant cast steel is mainly characterized by parallel and shallow furrows, which are formed by the friction of abrasive particles falling in the wear test. The falling abrasive particles generally have three states: one is that they fly away from the friction area directly as wear weight loss, the other is that they roll between the pin sample and the disk sample as abrasive particles, and the third is that they are embedded into the pin sample or disk sample as hard particles and scratch the experimental surface on the other side. The latter two states of abrasive particles can lead to furrow. It can be understood that at this time, in the two-body pin disk wear experiment, the two-body friction and wear is not absolute, but partially transformed into abrasive wear.
Figure B shows that the wear form of mnl3cr2 is mainly adhesive wear, and plastic deformation can be obviously observed. The metal matrix after plastic deformation is easy to adhere to each other and lead to greater deformation. At this time, the friction layer is very unstable. With the further deterioration of plastic deformation, the metal matrix has peeling behavior, The essential reason is that the strength of mnl3cr2 is far lower than that of bainitic martensitic wear-resistant cast steel, so it is easy to deform, resulting in the above series of failure behaviors.