Potential of sintered high speed steels in antifretting applications

Martin, B.; Wright, Christopher S.; Vincent, L.; Wronski, A. S.

doi:10.1179/pom.1999.42.1.63

Cited by 4 publications

(2 citation statements)

References 13 publications

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“…Also of considerable current interest is the improvement of machinability (valve-seat inserts) and self-lubricity (bearings, parts exposed to fretting, etc.) [20,21].…”

Section: Introductionmentioning

confidence: 98%

The influence of MoS2 additions on the densification of water-atomized HSS powders

Šuštaršič

Kosec

et al. 2006

Journal of Materials Processing Technology

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“…Also of considerable current interest is the improvement of machinability (valve-seat inserts) and self-lubricity (bearings, parts exposed to fretting, etc.) [20,21].…”

Section: Introductionmentioning

confidence: 98%

The influence of MoS2 additions on the densification of water-atomized HSS powders

Šuštaršič

Kosec

et al. 2006

Journal of Materials Processing Technology

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“…are synthesized. [8][9][10] Generally speaking, in higher carbon content alloyed steels, the martensite finish temperature (M f ) is below 0°C, which means that at the end of the heat treatment, a low percentage of austenite may be retained at room temperature. The retained austenite as a soft phase in steels could reduce the product life.…”

Section: Introductionmentioning

confidence: 99%

Microstructures and Mechanical Properties of TaC Added to Vanadis 4 Tool Steel through Vacuum Sintering and Heat Treatments

Huang¹,

Chang

Yeh

2017

ISIJ International

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In this study, different amounts of TaC powders (10, 15 and 20 mass%) are mixed and added to Vanadis 4 tool steel powder. The composite powders are sintered at 1 250, 1 300 and 1 325°C for 1 h, respectively. After that, a series of heat treatments is performed to determine the optimal parameters of the Vanadis 4 composites. The experimental results show the optimal vacuum sintering temperature for the Vanadis 4 composites to be 1 300°C. The Vanadis 4 specimens with a 10% TaC added possess the highest transverse rupture strength (TRS) value of 1 974.2 MPa and a suitable hardness (82.6 HRA). When the optimally sintered specimens of the Vanadis 4 composites then undergo a heat treatment, the TRS shows a significant increase to 2 069.4 MPa, while the hardness declines slightly to 81.5 HRA. In addition, the microstructural evaluation reveals that the plate-shaped carbides (M 7 C 3 ) located on the grain boundaries disappear after the TaC powders are added and that clustered TaC carbides appear in the grain boundaries instead. Meanwhile, with TaC as the nucleation sites of the VC carbides, the result is the generating of VC carbides in the grain boundaries. Moreover, the VC carbides decompose and re-precipitate the refined carbides (Fe 3 C), which are uniformly distributed within the grains. The results also show that heat treatment effectively improves the microstructure and strengthens the Vanadis 4 composites.

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