Micro-abrasive wear mechanisms of P/M AISI M2 steel with different surface treatments

Multi-component boron and niobium coating on M2 high speed steel processed by powder metallurgy

“…6a) shows three different regions. Near the surface, a dark grey region was identified as FeB; below this there was the formation of Fe2B (according other research [33]) and in sequence, there is the substrate. These mentioned phases, FeB and Fe2B, did not present different hardness values according Student's T-test, (2133 ± 266) HV0.025 and (2015 ± 254) HV0.025 respectively.…”

“…The Fe -Fe2B interface, as well as Fe2B -substrate interface exhibited a slight saw-tooth morphology, which can be less pronounced than in boronized plain steels. The alloying elements present in AISI M2 steel become the mentioned interfaces smoother than those in plain steel [33][34][35][36].…”

“…The total boron layer reached a thickness of 35 to 45 μm. The Fe2B phase was not identified by XRD, this may have occurred because this phase was formed below the surface of the sample [33][34][35][36].…”

Study on the Tribological Behavior of Wear and Friction Coefficient on AISI M35 High-Speed Steel with and without DLC Coating

“…The micro-abrasive wear test was performed according to the guidelines of ENV 1071 (EUROPEAN COMMITTEE FOR STANDARDIZATION, 2001). The equipment used was the Compact Calo tester CATc Anton Paar equipment, 25 mm diameter AISI 52100 steel ball frequently used in other studies 1,22,35 . A silicon carbide abrasive solution (SiC -99.98%) diluted 20% in ethylene glycol was used according to 36 , who mentions that it is a recommended choice due to the positive results obtained in other studies.…”

“…The EDS analyzes confirms this statement, that is, the majority of iron, carbon and tungsten are present in the analyzed areas, chemical elements present in the composition of AISI M35 HSS as discussed in Figure 3. On both surfaces, the final wear was predominantly characterized by the removal of material in the direction of the sphere sliding, presented by the presence of scratches/grooves resulting from the combined abrasive action (grooving) of the toughest bodies of the tribosystem: silicon carbide (SiC) and the sphere 35 . This combined action refers to three-body abrasion and two-body abrasion.…”