Influence of Heat Treatment Conditions on Properties of High-Speed P/M Steel Vanadis 30

Sobotová, Jana; Kuřík, Martin; Cejp, Jiří

doi:10.4028/www.scientific.net/kem.647.17

Cited by 3 publications

(4 citation statements)

References 6 publications

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“…In agreement with this paper it can be stated that the structure of both investigated steels after CHT and DCT consists of tempered martensite, a minimum amount of retained austenite, primary carbides bigger than 1 µm and secondary carbides with a size under 1 µm. Point EDS analysis confirmed, in agreement with results in [14,15], the presence of two types of carbides (Fig. 3).…”

Section: Fig 2 Effect Of Dct On the Bending Strength Of Pm Hss Vanadi...supporting

confidence: 89%

“…The structure of Vanadis 30 after CHT and DCT has already been described in paper [14]. In agreement with this paper it can be stated that the structure of both investigated steels after CHT and DCT consists of tempered martensite, a minimum amount of retained austenite, primary carbides bigger than 1 µm and secondary carbides with a size under 1 µm.…”

Section: Fig 2 Effect Of Dct On the Bending Strength Of Pm Hss Vanadi...supporting

confidence: 82%

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Effect of Chemical Composition and Heat Treatment Parameters on the Structure and Properties of Vanadis 23 and Vanadis 30 PM High-Speed Steels

Sobotová

Kuřík

2017

SSP

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The paper deals with the assessment of the effect of content of cobalt and cryogenic treatment on mechanical properties and structure of Vanadis 23 and Vanadis 30 PM high-speed steels. The studied characteristics are evaluated after conventional heat treatment (quenching and multiple tempering) and also when deep cryogenic treatment at -196°C/4 hours was inserted between quenching and tempering. The mechanical properties are assessed by a three-point bending flexural test and by measurement of the hardness. Metallographic analysis is performed using an energy dispersive spectrometer (EDS) and the scanning electron microscope (SEM).

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Section: Fig 2 Effect Of Dct On the Bending Strength Of Pm Hss Vanadi...supporting

confidence: 89%

Section: Fig 2 Effect Of Dct On the Bending Strength Of Pm Hss Vanadi...supporting

confidence: 82%

Effect of Chemical Composition and Heat Treatment Parameters on the Structure and Properties of Vanadis 23 and Vanadis 30 PM High-Speed Steels

Sobotová

Kuřík

2017

SSP

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“…For Vanadis 6 P/M tool steel for cold work, the occurrence of Cr-based M 7 C 3 type and V-based MC type carbides in the structure has been confirmed in the previous works [6,7]. In case of P/M HSS Vanadis 30, V-based MC type and W-based M6C type carbides are expected to be present in the structure [8,9]. Commonly used parameters of CHT were employed for both materials (nitrogen gas quenching at pressure of 5 bars).…”

Section: Methodsmentioning

confidence: 54%

Effect of Sub-Zero Treatment on the Wear Resistance of P/M Tool Steels

Sobotová¹,

Ku-Gik²,

Krum³

et al. 2016

J Appl Mech Eng

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Sub-zero treatment of tool steels is included within the cycle of conventional heat treatment. This kind of heat treatment has been reported to improve wear resistance of tools. The improvement is attributed to precipitation of fine carbide particles, but is depending on a number of the other factors as well. This paper follows the previous works, in which the effect of sub-zero treatment on the mechanical and structural properties of P/M tool steels was evaluated. Two types of P/M cold work tool steels were used in the research: Vanadis 6 and high speed steel Vanadis 30. They were austenitized, nitrogen gas quenched and tempered. The 4 hours long sub-zero period of dwell at -196°C was also incorporated between quenching and tempering. Wear evaluation was carried out using a pin-on-disk method.The observed values of wear resistance have been collated with the values of hardness and the bending strength. The results of the work are supplemented by a detailed analysis of the carbide particles of both monitored conditions.

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“…The use of either HSS or high-alloyed steels for sintered parts is a consolidated option for this application due to its good mechanical properties, corrosion resistance, high thermal conductivity and good machinability [16][17][18][19][20][21] . The quenching or cooling of the workpiece from the austenitic zone transforms the austenite that forms at the high temperature to a harder martensitic microstructure 22,23 . The cooling rate, which must be controlled, is dictated by the chemical composition of each material 24,25 .…”

Section: Introductionmentioning

confidence: 99%

Heat Treatment of Sintered Valve Seat Inserts

et al. 2018

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The characterization of sintered valve seat inserts (VSIs) after being subjected to different heat treatment operations has been carried out. The VSIs were obtained from three different alloys by mixing iron powder with AISI M3:2, AISI M2 high-speed steels, and AISI D2 tool steel. After sintering, the VSI were quenched in air followed by double tempering at seven different temperatures. The cooling rate during air quenching was measured by means of a thermocouple type k attached to a data acquisition system. The characterization of the mechanical and physical properties of the VSIs was achieved by measuring relative density, apparent hardness and crush radial strength. The resulting microstructures for the sintered parts were interpreted using the isothermal and continuous cooling transformation diagrams for similar alloys. The VSI obtained with AISI M3:2 and AISI M2 high-speed steels after air quenching and double tempering at 600 ºC showed the best results in terms of apparent hardness and crush radial strength.

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Influence of Heat Treatment Conditions on Properties of High-Speed P/M Steel Vanadis 30

Cited by 3 publications

References 6 publications

Effect of Chemical Composition and Heat Treatment Parameters on the Structure and Properties of Vanadis 23 and Vanadis 30 PM High-Speed Steels

Effect of Chemical Composition and Heat Treatment Parameters on the Structure and Properties of Vanadis 23 and Vanadis 30 PM High-Speed Steels

Effect of Sub-Zero Treatment on the Wear Resistance of P/M Tool Steels

Heat Treatment of Sintered Valve Seat Inserts

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