scholarly journals Nitriding of High Speed Steel for Improvement of Tools Resistance

2022 ◽  
Author(s):  
L. Petrova
Keyword(s):  
Phase Composition ◽  
High Speed ◽  
High Speed Steel ◽  
Dispersion Hardening ◽  
Internal Nitriding ◽  
High Quality ◽  
Gas Nitriding ◽  
Diffusion Layers ◽  
Tungsten Nitrides ◽  
Nitride Zone

Abstract. The article is devoted to the study of the gas nitriding process, which makes it possible to obtain high-quality diffusion layers in high-speed steel M2 on the basis of an internal nitriding zone without a brittle nitride zone. The results of studies of the nitrided steel phase composition with a change of the saturating atmosphere during dilution of ammonia by hydrogen are presented. An increase in the resistance of the nitrided tool when drilling structural steel is shown, which is associated with the dispersion hardening of the internal nitriding zone with tungsten nitrides.

Hardening of a quick-speed steel tool through nitration process with nitrogen controlled potential

2022 ◽  
Vol 2022 (1) ◽  
pp. 3-10
Author(s):  
Larisa Petrova ◽  
Vladimir Alexandrov ◽  
Viktor Vdovin ◽  
Pyotr Demin
Keyword(s):  
High Speed ◽  
Precipitation Hardening ◽  
High Speed Steel ◽  
Constructional Steel ◽  
Gas Nitriding ◽  
Hardening Treatment ◽  
Tungsten Nitrides ◽  
Controlled Potential ◽  
Nitrogen Potential ◽  
Nitride Zone

The study of the gas nitriding method, which allows obtaining high-quality diffuse layers in high-speed steel P6M5 on the basis of an internal nitrogen hardening zone with no brittle nitride zone, has been viewed. Research results of phase composition of nitrided steel with a change in the nitrogen potential of the atmosphere during dilution of ammonia are presented. Nitrided tool increased resistance during drilling constructional steel and titanium alloy, which is due to precipitation hardening treatment of the internal nitrogenization zone using tungsten nitrides, is given.

Specifics of Microstructure and Phase Composition of High-Speed Steel R6M5

2013 ◽  
Vol 404 ◽  
pp. 20-24 ◽  
Author(s):  
Маzhyn Skakov ◽  
Bauyrzhan Rakhadilov ◽  
Gaukhar Karipbayeva
Keyword(s):  
Phase Composition ◽  
High Speed ◽  
Volume Fraction ◽  
Electron Backscatter Diffraction ◽  
High Speed Steel ◽  
Spherical Shape ◽  
Xrd Analysis ◽  
Steel R6m5 ◽  
Solid Carbide ◽  
Backscatter Diffraction

In this paper microstructure, morphology, elemental composition, phase composition and crystal structure of the sample steel R6M5 were investigate by using the methods of scanning electron microscopy, electron backscatter diffraction (EBSD) analysis and X-ray diffraction (XRD) analysis. Determined that the microstructure of steel R6M5 after hardening and three-time tempering consists of tempered martensite and solid carbide M6C and MC-type with spherical shape and a diameter of less than 3 μm. Detected that the volume fraction of each carbide amounted to 10.4±0.6% and 2.3±0.4% - for grey and bright carbides, respectively, and that the sizes of bright carbides particles in the microstructure of steel R6M5 are 0.4-4,5 μm, and the sizes of grey carbides particles are 0.5-1.1 μm. XRD analysis showed that the main carbides in the studied steel are carbides М6С and MC, which have complicated the FCC crystal lattice and the Fd3m spatial group. Determined that carbides are uniform and monocrystalline. ESBD analysis with the support of the XRD analysis showed that carbides spherical shape М6С fit to Fe3W3C composition.

The Effect of Deposition Parameters on the Structural and Mechanical Properties of BN Coatings Deposited onto High-Speed Steel by the PLD Method

2015 ◽  
Vol 220-221 ◽  
pp. 737-742
Author(s):  
Krzysztof Gocman ◽  
Tadeusz Kałdoński ◽  
Waldemar Mróz ◽  
Bogusław Budner
Keyword(s):  
Mechanical Properties ◽  
High Speed ◽  
High Speed Steel ◽  
Rf Discharge ◽  
Internal Stresses ◽  
Force Microscopy ◽  
Gas Nitriding ◽  
Atomic Force ◽  
Deposition Parameters ◽  
Steel Substrates

Boron nitride coatings have been deposited onto high-speed steel substrates using pulsed laser deposition technique combined with RF-discharge. In order to improve adhesion and reduce internal stresses, substrates were subjected to gas nitriding. The structure and morphology of coatings were investigated applying atomic force microscopy (AFM) and FTIR spectroscopy. Nanohardness and elastic modulus were examined employing a nanoanalyzer (CETR). On the basis of the conducted experiments, stable, crystalline, multiphase coatings have been obtained. It has been proved that morphology, structure and mechanical properties strongly depend on the parameters of the PLD process; in particular, the temperature of the substrate has a crucial influence on the properties of BN coatings.

Phase composition and structure of atomized powders of a high-vanadium tungsten-molybdenum high-speed steel

1976 ◽  
Vol 15 (12) ◽  
pp. 903-905
Author(s):  
A. N. Popandopulo ◽  
L. N. Gerashchenko ◽  
Z. S. Bystrova ◽  
G. P. Anastasiadi
Keyword(s):  
Phase Composition ◽  
High Speed ◽  
High Speed Steel ◽  
Composition And Structure

Surface Modification of High-Speed Steel by Plasma Nitriding

2014 ◽  
Vol 709 ◽  
pp. 403-409 ◽  
Author(s):  
Bauyrzhan K. Rakhadilov ◽  
Mazhyn Skakov ◽  
Erlan Batyrbekov ◽  
Michael Scheffler
Keyword(s):  
Surface Layer ◽  
Phase Composition ◽  
Diffusion Layer ◽  
High Speed ◽  
Steel Surface ◽  
Plasma Nitriding ◽  
High Speed Steel ◽  
R6m5 Steel ◽  
Modified Layer ◽  
Surface Modified

The article investigates the changing in the structure and phase composition of the R6M5 high-speed steel surface layer after electrolytic-plasma nitriding. It is found that after electrolytic-plasma nitriding on the R6M5 steel surface, modified layer is formed, which consist from a diffusion layer. It was showed phase composition of difysion layer is changing depending on the nitriding. It is found that electrolytic-plasma nitriding lead to accelerated formation of the modified layer. It is determined that after electrolytic-plasma nitriding on the high-speed steel surface, modified layer is formed, consisting only of the diffusion layer.

Complex study of the phase composition of powdered stock for high-speed steel ROM2F3

1986 ◽  
Vol 25 (4) ◽  
pp. 303-305
Author(s):  
E. F. Yakovleva ◽  
Z. V. Barantseva ◽  
G. P. Bogomolova ◽  
V. L. Rodionov
Keyword(s):  
Phase Composition ◽  
High Speed ◽  
High Speed Steel ◽  
Complex Study

scholarly journals Surface Strengthening of High-Alloyed Martensitic Steel by Staged Nitriding

2021 ◽  
Vol 346 ◽  
pp. 02035
Author(s):  
Petr Bibikov ◽  
Larisa Petrova ◽  
Irina Belashova ◽  
Peter Demin
Keyword(s):  
Phase Composition ◽  
Impact Toughness ◽  
Final Stage ◽  
Martensitic Steel ◽  
Surface Strengthening ◽  
Gas Nitriding ◽  
Diffusion Layers

Gas nitriding processes with cyclical rotation of ammonia and ammonia/air atmospheres are suggested for surface strengthening of martensitic Cr-Ni-W-Mo-V steel. One-, two-, and three-staged processes were studied differing by gas atmospheres at the final stage of processes. Microstructure and phase composition of received diffusion layers were examined. Results of microhardness, wear and impact toughness tests are discussed in correspondence with the layers structure.

scholarly journals GAS NITRIDING WITH DEEP CRYOGENIC TREATMENT OF HIGH-SPEED STEEL

2018 ◽  
Vol 24 (2) ◽  
pp. 187 ◽  
Author(s):  
David Hradil ◽  
Michal Duchek ◽  
Taťána Hrbáčková ◽  
Aleksander Ciski
Keyword(s):  
High Speed ◽  
Conventional Treatment ◽  
Cryogenic Treatment ◽  
High Speed Steel ◽  
Iron Nitrides ◽  
Nitrogen Diffusion ◽  
Deep Cryogenic Treatment ◽  
Gas Nitriding ◽  
Subsurface Layers ◽  
Quenching And Tempering

<p class="AMSmaintext"><span lang="EN-GB">Nitriding with subsequent heat treatment in combination with deep cryogenic treatment (DCT) produces nitrided layers with specific properties. Layers with unique properties result from the dissolution of subsurface layers of iron nitrides and subsequent nitrogen diffusion into the substrate during austenitisation. Fine precipitates of carbonitrides eventually form during DCT and tempering. Intermediate deep cryogenic treatment was performed between the quenching and tempering steps. This work is based on comparing nitrided layers obtained using conventional treatment parameters with nitrided layers from novel processes. The experimental material was DIN 1.3343 (Czech Standard 41 9830) high-speed steel. Several treatment methods were compared in terms of the resulting hardness and metallographic characteristics.</span></p><p> </p>

Effect of plasma beam irradiation on the microstructure and phase composition of high-speed steel R6M5

2020 ◽  
Vol 62 (11) ◽  
pp. 1138-1142
Author(s):  
Bauyrzhan Rakhadilov ◽  
Sherzod Kurbanbekov ◽  
Мazhyn Skakov ◽  
Wojciech Wieleba ◽  
Laila Zhurerova
Keyword(s):  
Phase Composition ◽  
High Speed ◽  
High Speed Steel ◽  
Steel R6m5 ◽  
Beam Irradiation ◽  
Plasma Beam
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