Wear study of hot forging punches coated with WC-CoCr and Cr3C2-NiCr through high-velocity oxygen fuel (HVOF) process

Marques, Angela Selau; Costa, Luana De Lucca de; Santos, Giovanni Rocha dos; Rocha, Alexandre da Silva

doi:10.1007/s00170-018-2693-3

Cited by 14 publications

(3 citation statements)

References 21 publications

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“…It is evidenced in Fig. 16(b) that punch 1R has a combination of adhesive and abrasive wear [6,39]. Punches 2R and 3R have adhesive wear on the punch surface.…”

Section: Punches Performancementioning

confidence: 96%

“…It is observed in Fig. 16(a) that punches 1N and 3N have material adhered to the punch surface, a characteristic aspect of adhesive wear [6,38]. Punch 2N, Fig.…”

Section: Punches Performancementioning

confidence: 98%

“…The main problem in welding cold work tool steel stems from its high hardenability [2], and consequently, there is a susceptibility of steels easily cracking in the heat affected zone (HAZ) after welding [3], due to the significant increase in hardness in these regions [4,5]. The cracks generated can propagate through the punches [6]. To solve these problems, it is necessary to use pre-heating and tempering after welding [7,8].…”

Section: Introductionmentioning

confidence: 99%

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An investigation on the suitability of different welding recovery procedures for cold stamping punches in VF800AT steel

Pellin,

Israel,

Dalcin

2024

Int J Adv Manuf Technol

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In the present investigation, a procedure was developed to recover VF800AT steel stamping punches by the GMAW process, using Tube-Alloy 260-G, a gas-shielded, metal-cored wire that deposits a martensitic alloy steel. The samples were pre-heated at 450, 500 and 550 °C, and after weld repaired, were submitted to tempering. The samples were characterized before and after the weld repair concerning the macrostructure, microstructure, and microhardness. The correlation of the hardness in the weld metal, heat affected zone and base metal regions with the heat treatments was evaluated statistically by analysis of variance. To experimentally validate this condition, a performance test of the new and weld repaired punches was carried out. Optical microscopy, roughness measurements, and scanning electron microscopy were carried out to evaluate the geometric shape of the radius of the cutting-edge radius and the type of wear acting on the punches.Punches pre-heated to 450 °C and submitted to one tempering step presented the best results, being the most suitable to recover stamping tools made of VF800AT steel by the GMAW process.

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“…It is evidenced in Fig. 16(b) that punch 1R has a combination of adhesive and abrasive wear [6,39]. Punches 2R and 3R have adhesive wear on the punch surface.…”

Section: Punches Performancementioning

confidence: 96%

“…It is observed in Fig. 16(a) that punches 1N and 3N have material adhered to the punch surface, a characteristic aspect of adhesive wear [6,38]. Punch 2N, Fig.…”

Section: Punches Performancementioning

confidence: 98%