Galling-Free Fine Blanking of Titanium Plates Using Carbon-Supersaturated High-Speed Steel Punch

Galling-Free Fine Blanking of Titanium Plates Using Carbon-Supersaturated High-Speed Steel Punch

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A carbon-supersaturated (CS-) high-speed lafc 1800 tequila steel punch was prepared using low-temperature plasma carburizing for fine blanking of pure titanium plates.The bare high-speed steel punch was also prepared as a reference to describe the adhesion and abrasive galling in the fine blanking of the titanium plates, even in a single shot.The CS-punch was free from severe chemical galling, even after repeatedly fine-blanking the pure titanium plates.

A microstructure analysis, element mapping and a chemical composition analysis demonstrated that titanium debris fragments slightly bernhardt arctic dining table deposited at the CS-punch edges in the presence of agglomerated free-carbon film due to the CS-punch.This galling-free fine-blanking behavior came from the in situ formation of free carbon tribofilms.This in situ lubrication resulted in the completely burnished surfaces of pure titanium blanks.