scholarly journals RESEARCH OF MICRORELIEF AND STRUCTURE OF THE SURFACE LAYER BY LASER AND ULTRASONIC THERMO-STRAINING TREATMENT OF TOOL STEEL

2016 ◽  
Vol 3 (78) ◽  
Author(s):  
Дмитро Лесик ◽  
Віталій Джемелінський ◽  
Олександр Данилейко ◽  
Василь Хижевський
Keyword(s):  
Surface Layer ◽  
Tool Steel

scholarly journals Properties Evaluation of Thin Microhardened Surface Layer of Tool Steel after Wire EDM

Metals ◽  
2016 ◽  
Vol 6 (5) ◽  
pp. 95 ◽  
Author(s):  
Ľuboslav Straka ◽  
Ivan Čorný ◽  
Ján Piteľ
Keyword(s):  
Surface Layer ◽  
Tool Steel ◽  
Wire Edm

scholarly journals THE INFLUENCE OF THE SOAKING TEMPERATURE OF NITRIDED WCL TOOL STEEL (EN-X37CrMoV5-1) ON THE MICROHARDNESS AND TRIBOLOGICAL WEAR OF THE SURFACE LAYER

Tribologia ◽  
2016 ◽  
Vol 268 (4) ◽  
pp. 69-78
Author(s):  
Michał DWORAK ◽  
Adrian BARYLSKI ◽  
Krzysztof ANIOŁEK ◽  
Elizaveta STEPANOVA
Keyword(s):  
Surface Layer ◽  
High Temperature ◽  
Low Temperature ◽  
Tool Steel ◽  
Nitrided Layer ◽  
Industrial Furnace ◽  
Tribological Tests ◽  
Nitrided Steel ◽  
Hot Work Tool Steel ◽  
Soaking Temperature

The present paper refers to the evaluation of the influence of soaking temperature of nitrided hot work tool steel, X37CrMoV5-1 (WCL), intended for dies for extruding aluminium profiles, on the structure, microhardness, and tribological wear of the nitrided layer. The research involved nitrided steel specimens (X37CrMoV5-1) soaked for 8 hours in an industrial furnace at temperatures of 450°C, 480°C, 520°C, 560°C, and 600°C. For comparison purposes, a REFERENCES material was used, which was not soaked after nitriding. Initially, as the soaking temperature raised, the microhardness of the nitrided layer increased by ca. 10%; however, a further increase in the soaking temperature to more than 450°C caused a decrease in the microhardness of the nitrided layer. The results of tribological tests showed that soaking nitrided steel at a low temperature (450°C) and high temperature (600°C) caused a decrease in tribological wear. Out of the tested materials, the highest microhardness of the upper layer was observed in the samples soaked at 450°C, while the highest resistance to tribological wear was obtained for the samples soaked at 600°C. The conducted tests indicate the possibility of extending the lifetime of dies made from the investigated nitrided steel.

scholarly journals Improving the mechanical properties of tool steel by induction chemical-thermal treatment

2021 ◽  
Vol 2086 (1) ◽  
pp. 012200
Author(s):  
P Palkanov ◽  
V Koshuro ◽  
A Fomin
Keyword(s):  
Mechanical Properties ◽  
Surface Layer ◽  
Thermal Treatment ◽  
Tool Steel ◽  
High Speed ◽  
Nitride Layer ◽  
Surface Microhardness ◽  
Gaseous Nitrogen ◽  
Gradient Diffusion ◽  
Study Results

Abstract The study results of the structure and microhardness of the surface layer of high-speed tool steel after induction chemical-thermal treatment in a gaseous nitrogen-containing medium at a temperature of 900–1100 °C were presented. Due to the strengthening treatment of products a gradient diffusion nitride layer with a thickness of about 200 μm and a surface microhardness of 1950±70 HV1 98 was formed.

Laser Alloying with WC Ceramic Powder in Hot Work Tool Steel Using a High Power Diode Laser (HPDL)

2006 ◽  
Vol 15-17 ◽  
pp. 193-198 ◽  
Author(s):  
Marek Piec ◽  
Leszek Adam Dobrzański ◽  
Krzysztof Labisz ◽  
Ewa Jonda ◽  
Andrzej Klimpel
Keyword(s):  
Surface Layer ◽  
Tungsten Carbide ◽  
Diode Laser ◽  
Tool Steel ◽  
High Power ◽  
Feed Rate ◽  
Powder Feed Rate ◽  
Powder Feed ◽  
Power Diode ◽  
High Power Diode Laser

Investigations include alloying the X38CrMoV5-3 hot-work tool steel surface layer with the tungsten carbide, using the high power diode laser (HPDL). The tungsten carbide ceramic particles of the medium grain size according to FSSS = 50 /m were introduced using the rotor conveyer to improve the properties of the surface layer. The powder feed rate was set at the steady level of 8.64g/min. Remelting and alloying were carried out several times in the laser power range of 1.2 – 2.3 kW in the remelting/alloying, alloying/remelting sequences. The structural mechanism was determined of gradient layer development, effect was studied of alloying parameters, gas protection method, and powder feed rate on its mechanical properties, and especially on its hardness, abrasive wear resistance, and roughness. Structure changes were revealed consisting, in particular, in its refining, and also hardness and microhardness changes in comparizon to the nonremelted steel. Examination results obtained with the EDX microanalysis, surface and linear analysis of the chemical composition, as well as the X-ray qualitative phase analysis are presented.

Influence of Microshot Peening on Surface Layer Characteristics of Cold Tool Steel

2007 ◽  
Vol 561-565 ◽  
pp. 897-900 ◽  
Author(s):  
Yasunori Harada ◽  
Kenzo Fukaura ◽  
Toshinori Aoki ◽  
Daien Yokoi ◽  
Yasushi Haruna
Keyword(s):  
Residual Stress ◽  
Surface Roughness ◽  
Surface Layer ◽  
Fatigue Strength ◽  
Tool Steel ◽  
Compressive Residual Stress ◽  
Heating Furnace ◽  
Cemented Carbide ◽  
Compressed Air ◽  
New Type

Shot peening is a surface treatment and improves the performance of engineering components. More recently, a new type of microshot has been developed to enhance peening effect. In the present study, the influence of microshot peening on the surface layer characteristics of cold tool steel was investigated. In the experiment, the microshot peening apparatus with a heating furnace was produced experimentally. The projective method of the microshot was a compressed air type. The peening microshots of 0.1mm diameter were cemented carbide and the workpiece was commercially cold tool steel SKD11. Surface roughness, compressive residual stress, and hardness in the peened workpiece were measured. The effect of microshot peening on the fatigue strength of cold tool steel was also examined. The use of hard microshot such as cemented carbide was found to cause a significantly enhanced peening effect for cold tool steel.

Formation of VC-composite surface layer on high C–Cr bearing tool steel by laser surface cladding

2015 ◽  
Vol 20 ◽  
pp. 190-197 ◽  
Author(s):  
Hashem F. El-Labban ◽  
Essam R.I. Mahmoud ◽  
Hussein Al-Wadai
Keyword(s):  
Surface Layer ◽  
Tool Steel ◽  
Laser Surface ◽  
Composite Surface

scholarly journals Comparison of surface layer properties of AISI D2 and Vanadis 6 hardened tool steel

Mechanik ◽  
2017 ◽  
Vol 90 (10) ◽  
pp. 852-854
Author(s):  
Daniel Toboła ◽  
Jolanta Cyboroń ◽  
Aneta Łętocha ◽  
Jolanta Laszkiewicz-Łukasik
Keyword(s):  
Surface Layer ◽  
Tool Steel ◽  
Hard Turning ◽  
Geometrical Structure ◽  
Tool Steels ◽  
Aisi D2 ◽  
Hardened Tool Steel ◽  
Slide Burnishing

Selected properties of the surface layer (SL) of AISI D2 and Vanadis 6 tool steels at hardness of 60 ±1 HRC, after grinding and hard turning with subsequent slide burnishing are presented. The influence of the mentioned mechanical treatments in relation to the geometrical structure, microstructure and stresses level in SL for tested steels were determined.

Influence of Microshot Peening on Surface Layer Characteristics of Cold Tool Steel

2007 ◽  
pp. 897-900
Author(s):  
Yasunori Harada ◽  
Kenzo Fukaura ◽  
Toshinori Aoki ◽  
Daien Yokoi ◽  
Yasushi Haruna
Keyword(s):  
Surface Layer ◽  
Tool Steel

Effect of diffusion borochromizing on microstructure, microhardness and corrosion resistance of tool steel with different carbon content

2017 ◽  
Vol 2 (80) ◽  
pp. 49-55 ◽  
Author(s):  
A. Bartkowska ◽  
D. Bartkowski ◽  
A. Piasecki
Keyword(s):  
Corrosion Resistance ◽  
Surface Layer ◽  
Carbon Content ◽  
Tool Steel ◽  
Powder Mixture ◽  
Design Methodology ◽  
Nacl Solution ◽  
Study Results ◽  
Potentiodynamic Method ◽  
Resistance Tests

Purpose: The aim of this paper is presents the study results concerning influence of carbon content on the surface layer condition, microstructure, microhardness and corrosion resistance of diffusion borochromized layer. Design/methodology/approach: In paper the three types of tool steel were analysed: CT90, 145Cr6 and 165CrV12. The borochromzing process was carried out in a powder mixture containing B4C, Fe-Cr, Al2O3 at temperature 950°C for 6 h. The source of chromium was Fe-Cr while the source of boron was B4C. Findings: As a result of borochromizing process the layer with microstructure similar to boronized layer was obtained. The thickness of the resulting surface layer was dependent on the carbon content of steel. Microhardness of the borochromized layer was similar to the microhardness of the boronized layer. Additionally the corrosion resistance tests in 5% NaCl solution were performed using a potentiodynamic method. It was found that the best corrosion resistance was characterized a layer on the steel with less carbon content. Originality/value: Value of the paper is analysis of corrosion resistance by potentiodynamic method of the tool steel with borochromized layer.

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