Mechanisms of built-up layer formation on turning tools: Influence of tool and workpiece

Analysis of the evolution of the Built-Up Edge and Built-Up Layer formation mechanisms in the dry turning of aeronautical aluminium alloys

“…In effect, as it can be observed in these figures a secondary BUL is developed over the original BUL. According to the data reported in [13,18,21,31] for the machining processes of other materials, it is possible to think that the secondary BUL is formed by the extrusion of the BUE developed after the formation of the primary BUL.…”

“…However, only a limited number of the results reported in those research papers studies of the BUL and BUE formation mechanisms. An analysis of some of these papers reveals that BUL and BUE are usually originated by different mechanisms depending mainly on both tool and workpiece materials [18][19][20][21][22][23][24][25][26]. In effect, thermal and mechanical properties of the workpiece material have a special influence in the secondary adhesion tool wear mechanisms, especially in the BUL development.…”

The influence of sulfur on the machinability of gray cast iron FC25

“…Depending on adequate conditions, the inclusions build a protective layer on the tool surface, named built-up layer (BUL), which promotes wear reduction of the tool and diminishes the cutting force [4][5][6][7].…”

The Influence of Microstructure and Non-Metallic Inclusions on the Machinability of Clean Steels

“…Therefore, MnS inclusions are less detrimental to the flank wear of a cutting tool. In addition, MnS inclusions promote the formation of protective slag deposits (often rich in calcium) on the cutting tool surface, which can reduce the flank and crater wear rate . It means that the formation of (Mn,Ca)S and (Al,Mg)O–(Mn,Ca)S inclusions can protect the cutting tool at the tool edge–chip interface.…”