Influence of cryo-processing on properties of tungsten carbide with low, medium and high cobalt content

Muthuswamy, Padmakumar; Guruprasath, J.; Dinakaran, D.

doi:10.1088/2053-1591/ab3c97

Cited by 7 publications

(2 citation statements)

References 31 publications

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“…Like iron, as cobalt, a key element used as a binder in the manufacturing of cemented carbide tools is ferromagnetic, the phase transformation (from FCC to HCP) would occur for it as well which would have played a key role in increasing the hardness and hence the performance improvement. Phase transformation of cobalt in cryo-treated tungsten carbide tools was seen by other researchers as well [15,16,[25][26][27] which resulted in slight increase in the hardness and improved wear resistance.…”

Section: Metallurgical Evaluationmentioning

confidence: 64%

“…Researchers have proven that due to very low volumetric composition of cobalt present in tungsten carbide tools, the high-intensity peaks of tungsten carbide mask the cobalt peaks which make it impossible to study the phase structure of cobalt [15,21,27]. To clearly see the peaks of different cobalt phases the amount of cobalt must be at least 40% [21].…”

Section: Metallurgical Evaluationmentioning

confidence: 99%

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Investigation on the effect of cryogenic treatment on tungsten carbide milling insert with 11% cobalt (WC–11%Co)

Muthuswamy¹,

Dinakaran

2020

SN Appl. Sci.

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The objective of this research is to evaluate the performance of cryogenically treated cemented carbide milling inserts with 11% cobalt content in face milling of EN19 steel. Two different deep cryogenic treatments at temperature of around − 193 °C were performed on the inserts, namely cryogenic treatment and cryogenic treatment and tempering. Uncoated tungsten carbide face milling inserts with 11% cobalt content were used in this research. Machining tests were conducted at the catalog recommended cutting parameters, and flank wear and nose wear of untreated, cryogenically treated and cryogenically treated and tempered inserts were compared to study the performance. The experimental investigation revealed that both cryogenic treated and cryogenic treated and tempered inserts showed 4-7% lesser flank and nose wear than the untreated inserts. The metallurgical examinations using indirect measurement technique revealed the phase transformation of cobalt from FCC to HCP which could have resulted in increased hardness, reduced friction coefficient and improved tool life.

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