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.

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.

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.

Grain Size of Commercial High Speed Steel

2006 ◽  
Vol 530-531 ◽  
pp. 16-21 ◽  
Author(s):  
Rejane A. Nogueira ◽  
Oscar O. Araújo Filho ◽  
Leonardo F.M. Souza ◽  
João Franklin Liberati ◽  
Lucio Salgado ◽  
...  
Keyword(s):  
Grain Size ◽  
Grain Growth ◽  
High Speed ◽  
High Speed Steel ◽  
Matrix Composition ◽  
Quenching Temperature ◽  
Austenite Grain Size ◽  
Powder Metallurgy Process ◽  
Hardening Treatment ◽  
Metallurgy Process

The heat treatment of high speed steel tools consists of austenitizing, quenching and tempering. The size of austenite grains formed during the hardening treatment is an important factor in the final microstructure of the steel, and it also affects properties such as wear resistance and toughness. This paper presents the austenite grain size, matrix composition and hardness of commercial AISI M2, AISI T15, VWM3C and Sinter 23 high speed steels that were austenitized and quenched from five distinct temperatures. This study shows that increase in quenching temperature results in grain growth of steels such as AISI M2 and VWM3C, obtained by the conventional method (cast to ingot and worked). The P/M Sinter 23 high speed steel showed a slight grain growth (about 10%). This effect was not observed in AISI T15 obtained by the powder metallurgy process.

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 Powder-Mixed Dielectric on EDM Process Performance

2020 ◽  
Vol 38 (8A) ◽  
pp. 1226-1235
Author(s):  
Safa R. Fadhil ◽  
Shukry. H. Aghdeab
Keyword(s):  
Silicon Carbide ◽  
High Speed ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
High Speed Steel ◽  
Transformer Oil ◽  
Dielectric Fluid ◽  
Peak Current ◽  
Powder Concentration ◽  
Pulse On Time

Electrical Discharge Machining (EDM) is extensively used to manufacture different conductive materials, including difficult to machine materials with intricate profiles. Powder Mixed Electro-Discharge Machining (PMEDM) is a modern innovation in promoting the capabilities of conventional EDM. In this process, suitable materials in fine powder form are mixed in the dielectric fluid. An equal percentage of graphite and silicon carbide powders have been mixed together with the transformer oil and used as the dielectric media in this work. The aim of this study is to investigate the effect of some process parameters such as peak current, pulse-on time, and powder concentration of machining High-speed steel (HSS)/(M2) on the material removal rate (MRR), tool wear rate (TWR) and the surface roughness (Ra). Experiments have been designed and analyzed using Response Surface Methodology (RSM) approach by adopting a face-centered central composite design (FCCD). It is found that added graphite-silicon carbide mixing powder to the dielectric fluid enhanced the MRR and Ra as well as reduced the TWR at various conditions. Maximum MRR was (0.492 g/min) obtained at a peak current of (24 A), pulse on (100 µs), and powder concentration (10 g/l), minimum TWR was (0.00126 g/min) at (10 A, 100 µs, and 10 g/l), and better Ra was (3.51 µm) at (10 A, 50 µs, and 10 g/l).

Enhancement of EDM Performance by Using Copper-Silver Composite Electrode

2020 ◽  
Vol 38 (9A) ◽  
pp. 1352-1358
Author(s):  
Saad K. Shather ◽  
Abbas A. Ibrahim ◽  
Zainab H. Mohsein ◽  
Omar H. Hassoon
Keyword(s):  
Surface Roughness ◽  
Material Removal Rate ◽  
Material Removal ◽  
High Speed ◽  
Composite Electrode ◽  
Removal Rate ◽  
Pure Copper ◽  
High Speed Steel ◽  
Pulse On Time ◽  
Pulse Off Time

Discharge Machining is a non-traditional machining technique and usually applied for hard metals and complex shapes that difficult to machining in the traditional cutting process. This process depends on different parameters that can affect the material removal rate and surface roughness. The electrode material is one of the important parameters in Electro –Discharge Machining (EDM). In this paper, the experimental work carried out by using a composite material electrode and the workpiece material from a high-speed steel plate. The cutting conditions: current (10 Amps, 12 Amps, 14 Amps), pulse on time (100 µs, 150 µs, 200 µs), pulse off time 25 µs, casting technique has been carried out to prepare the composite electrodes copper-sliver. The experimental results showed that Copper-Sliver (weight ratio70:30) gives better results than commonly electrode copper, Material Removal Rate (MRR) Copper-Sliver composite electrode reach to 0.225 gm/min higher than the pure Copper electrode. The lower value of the tool wear rate achieved with the composite electrode is 0.0001 gm/min. The surface roughness of the workpiece improved with a composite electrode compared with the pure electrode.

MUSTANG-LC

Alloy Digest ◽  
1967 ◽  
Vol 16 (4) ◽  
Keyword(s):  
Physical Properties ◽  
High Speed ◽  
High Speed Steel ◽  
Hot Extrusion ◽  
Heat Treating ◽  
Hot Forming ◽  
Steel Company ◽  
Extrusion Dies ◽  
Die Life

Abstract Mustang-LC is a tungsten-molybdenum high-speed steel specially developed for hot work applications requiring long die life. It is recommended for hot forming and swaging dies, hot extrusion dies, hot punches, etc. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on forming, heat treating, machining, and joining. Filing Code: TS-192. Producer or source: Jessop Steel Company.

UNS T12001

Alloy Digest ◽  
1989 ◽  
Vol 38 (1) ◽  
Keyword(s):  
Heat Treatment ◽  
Physical Properties ◽  
Tool Steel ◽  
High Speed ◽  
High Speed Steel ◽  
Heat Treating ◽  
General Purpose ◽  
Steel Mills

Abstract UNS T12001 is a general-purpose, tungsten, high-speed steel containing nominally 18% tungsten, 4% chromium and 1% vanadium. It is suitable for practically all high-speed applications. This steel has been the standard of the industry for many years because of its cutting ability, ease of heat treatment and minimum tendency to decarburize. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on forming, heat treating, and machining. Filing Code: TS-495. Producer or source: Tool steel mills.

UNS T11310

Alloy Digest ◽  
1988 ◽  
Vol 37 (5) ◽  
Keyword(s):  
Physical Properties ◽  
Tensile Properties ◽  
Tool Steel ◽  
High Speed ◽  
Cutting Tools ◽  
High Speed Steel ◽  
Heat Treating ◽  
General Purpose ◽  
Steel Mills

Abstract UNS No. T11310 is the high vanadium type of molybdenum high-speed steel. It is a deep-hardening steel and offers high cutting ability and excellent finishing properties. It is a general-purpose steel for cutting tools and is used in such applications as taps, lathe tools and reamers. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on heat treating and machining. Filing Code: TS-490. Producer or source: Tool steel mills.

AISI TYPE M7

Alloy Digest ◽  
1987 ◽  
Vol 36 (10) ◽  
Keyword(s):  
Tool Steel ◽  
High Speed ◽  
High Speed Steel ◽  
Heat Treating ◽  
Significant Loss ◽  
Steel Mills ◽  
Aisi Type ◽  
End Mills ◽  
The Many ◽  
Twist Drills

Abstract AISI Type M7 is a molybdenum type of high-speed steel. It is somewhat similar to AISI Type M1 tool steel but with higher percentages of carbon and vanadium to provide an improvement over AISI Type M1 in cutting characteristics without a significant loss in toughness. It is suitable for a wide variety of cutting-tool applications where improved resistance to abrasion is required. The many uses of Type M7 include twist drills, end mills, shear blades, punches, milling cutters, lathe tools, taps and reamers. This datasheet provides information on composition, physical properties, hardness, and elasticity as well as fracture toughness. It also includes information on forming, heat treating, machining, and surface treatment. Filing Code: TS-483. Producer or source: Tool steel mills. See also Alloy Digest TS-468, January 1987.

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