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Baglyuk, G. А.; Poznyak, L. A.

doi:10.1023/a:1021113025628

Cited by 16 publications

(3 citation statements)

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“…It was observed by the results observed by SEM that grinding for 60 minutes at high energy mill SPEX provided, despite the formation of platelet, good distribution of carbide in the AISI M2 and M3:2 metal matrix, resulting in more homogeneous mixtures in relation to the time of grinding of 30 minutes. It can be seen that there was incorporation of hard particles of niobium carbide in the matrix , forming composite particles [7] . Because of higher energy SPEX , finer powders could be obtained in shorter times of grinding, however, the time for 30 minutes showed the presence of platelets, characterized microwelding of the iron particles , with formation of corresponding greater particle sizes.…”

Section: Discussionmentioning

confidence: 99%

Preparation of Molybdenum High Speed Tool Steels with Addition of Niobium Carbide by Powder Metallurgy Techniques

Filho

Antonello

Gonzalez

et al. 2014

MSF

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High speed steels processed by Powder Metallurgy (PM) techniques present better mechanical properties when compared with similar steels obtained by the conventional process of cast to ingot and hot working. PM techniques produce improved microstructures with smaller and better distribution of carbides. Liquid phase sintering high speed steel seems to be a cheaper processing route in the manufacturing of tool steels if compared to the well-known and expansive hot isostatic pressing high speed steels. The introduction of niobium as alloying element began with the object of replacing elements like vanadium (V) and tungsten (W). Phase liquid sintering consists in a manufacturing technique to process high speed steels by powder metallurgy. The aim of this work of research is to process and obtain AISI M2 and M3:2 with and without the addition of niobium carbide by high energy milling, cold uniaxial compaction and vacuum sintering in the presence of a liquid phase. The powders of the AISI M2 and M3:2 were processed by high energy milling adding a small quantity of niobium carbide (6% in mass), then the powders were characterized by means of X-ray diffraction (XRD) and scanning electron Microscopy (SEM) plus energy dispersion spectroscopy (EDS) in order to evaluate the milling process. The powders of the AISI M2 and M3:2 with the addition of niobium carbide (NbC) were uniaxially cold compacted and then submitted to vacuum sintering. The sintered samples had their microstructure, porosity and carbide distribution observed and evaluated by means of Scanning Electron Microscopy (SEM) and the mechanical property of hardness was investigated by means of Vickers hardness tests. At least five samples of each steel were investigated.

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Section: Discussionmentioning

confidence: 99%

Preparation of Molybdenum High Speed Tool Steels with Addition of Niobium Carbide by Powder Metallurgy Techniques

Filho

Antonello

Gonzalez

et al. 2014

MSF

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“…This technology is also being developed in terms of powder compacting and sintering methods. In the late 1990s and early 2000s, most of the research focused on sintered HSS with the addition of hard ceramics such as titanium carbide TiC [ 2 , 3 , 4 ], vanadium carbide VC [ 5 ], manganese sulfide MnS [ 6 ], niobium carbide NbC [ 7 ], aluminum oxide Al 2 O 3 and titanium nitride TiN [ 8 ]. The composition was modified in order to obtain a more wear-resistant material based on HSS.…”

Section: Introductionmentioning

confidence: 99%

“…The composition was modified in order to obtain a more wear-resistant material based on HSS. Another goal was also to influence the sintering process by activating it with carbon obtained from the dissolution of carbides, which was the case, for example, in the WC carbide, MnS [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Sintering Temperature and Iron Addition on Properties and Microstructure of High Speed Steel Based Materials Produced by Spark Plasma Sintering Method

Madej

Leszczyńska-Madej²,

Garbiec³

2022

Materials

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Attempts were made to describe the effect of the sintering temperature and pure iron powder addition on the properties of HSS-based materials produced by the spark plasma sintering method (SPS). After sintering, their density, hardness, flexural strength, and tribological properties were determined. The sintered materials were also subjected to microstructural analysis to determine the phenomena occurring at the particle contact boundaries during sintering. On the basis of analysis of the obtained results, it was found that the mechanical properties and microstructure were mainly influenced by the sintering temperature, which was selected in relation to the previously tested steel M3/2, adjusted upwards due to its chemical composition. The use of the temperature of 1050 °C allows materials to be obtained with a density close to the theoretical density (97%), characterized by a high hardness of about 360 HB. The addition of iron slightly reduces the hardness and also increases the flexural strength to 577 MPa. There was no diffusion of the alloying elements from the steel to the iron due to the short time of exposure to the sintering temperature.

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Powder Injection Molding: Sinter-Hardening

Dobrzański¹,

Matula²

2016

Encyclopedia of Iron, Steel, and Their Alloys

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Cited by 16 publications

References 1 publication

Preparation of Molybdenum High Speed Tool Steels with Addition of Niobium Carbide by Powder Metallurgy Techniques

Preparation of Molybdenum High Speed Tool Steels with Addition of Niobium Carbide by Powder Metallurgy Techniques

Effect of Sintering Temperature and Iron Addition on Properties and Microstructure of High Speed Steel Based Materials Produced by Spark Plasma Sintering Method

Powder Injection Molding: Sinter-Hardening

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