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.

Structure and Properties of Gradient Layers Using High Power Diode Laser

2006 ◽  
Vol 530-531 ◽  
pp. 269-274
Author(s):  
Leszek Adam Dobrzański ◽  
Marek Piec ◽  
Zuzanka Trojanová ◽  
Józef Lelątko ◽  
Andrzej Klimpel
Keyword(s):  
Surface Layer ◽  
Tungsten Carbide ◽  
Diode Laser ◽  
High Power ◽  
Feed Rate ◽  
Powder Feed Rate ◽  
Powder Feed ◽  
Protection Method ◽  
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 Bm 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 comparison to the non-remelted steel. Examination results obtained with the EDX microanalysis, surface and linear analyses of the chemical composition, as well as the X-ray qualitative phase analysis are presented.

High-power diode laser assisted hard turning of AISI D2 tool steel

2006 ◽  
Vol 46 (15) ◽  
pp. 2009-2016 ◽  
Author(s):  
P. Dumitrescu ◽  
P. Koshy ◽  
J. Stenekes ◽  
M.A. Elbestawi
Keyword(s):  
Diode Laser ◽  
Tool Steel ◽  
High Power ◽  
Hard Turning ◽  
Aisi D2 ◽  
Aisi D2 Tool Steel ◽  
Power Diode ◽  
High Power Diode Laser

Cladding of Tungsten Carbide and Stellite Using High Power Diode Laser to Improve the Surface Properties of Stainless Steel

2012 ◽  
Vol 585 ◽  
pp. 498-501 ◽  
Author(s):  
Raghuvir Singh ◽  
S.K. Tiwari ◽  
Suman K. Mishra
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Tungsten Carbide ◽  
Diode Laser ◽  
High Power ◽  
Surface Engineering ◽  
Industrial Applications ◽  
Engineering Technique ◽  
Power Diode ◽  
High Power Diode Laser

Surface engineering is one of the most viable methods, in addition to development of new alloys and equipment design, to minimize degradation due to cavitation erosion, and corrosion. Laser surface cladding is relatively a newer engineering technique to produce metallurgically bonded coating for industrial applications due to its inherent benefits. Present paper reports the results obtained on the laser cladding of stainless steel with tungsten carbide (WC) and stellite alloy powder using high power diode laser (HPDL) at various laser parameters. Cladded specimens were characterized for erosion, and corrosion resistance. Both WC and stellite cladding have increased the erosion resistance of stainless steels. WC cladding was found to reduce the corrosion resistance of steel while stellite showed it to increase significantly.

scholarly journals The Effect of Laser Surface Treatment on Structure and Mechanical Properties Aluminium Alloy ENAC-AlMg9

2016 ◽  
Vol 61 (3) ◽  
pp. 1343-1350 ◽  
Author(s):  
W. Pakieła ◽  
L.A. Dobrzański ◽  
K. Labisz ◽  
T. Tański ◽  
K. Basa ◽  
...  
Keyword(s):  
Surface Treatment ◽  
Tungsten Carbide ◽  
Aluminium Alloy ◽  
Diode Laser ◽  
High Power ◽  
Ceramic Powder ◽  
Laser Surface ◽  
Laser Surface Treatment ◽  
Power Diode ◽  
High Power Diode Laser

Abstract In this work, the influence of a high power diode laser surface treatment on the structure and properties of aluminium alloy has been determined. The aim of this study was to improve the mechanical and tribological properties of the surface layer of the aluminium alloy by simultaneously melting and feeding tungsten carbide particles into the molten pool. During the process was used high-power diode laser HPDL. In order to remelt the aluminium alloy surface the HPDL laser of 1.8, 2.0 and 2.2 kW laser beam power has been used. The linear laser scan rate of the beam was set 0.5 cm/s. In order to protect the liquid metal during laser treatment was used argon. As a base material was used aluminium alloy ENAC-AlMg9. To improve the surface mechanical and wear properties of the applied aluminium alloy was used biphasic tungsten carbide WC/W2C. The size of alloying powder was in the range 110-210 µm. The ceramic powder was introduced in the remelting zone by a gravity feeder at a constant rate of 8 g/m.

HPDL Laser Alloying of Al-Si-Cu Alloy with ZrO2 Powder

2014 ◽  
Vol 1036 ◽  
pp. 434-439 ◽  
Author(s):  
Krzysztof Labisz ◽  
Tomasz Tański ◽  
Beata Krupińska ◽  
Mariusz Krupiński ◽  
Wojciech Pakieła
Keyword(s):  
Surface Layer ◽  
Laser Treatment ◽  
Diode Laser ◽  
High Power ◽  
Aluminium Alloys ◽  
Laser Power ◽  
Ceramic Powder ◽  
Heat Treated ◽  
Power Diode ◽  
High Power Diode Laser

The purpose of this paper was the investigation of laser treatment influence on the microstructure and properties of the surface layer of heat treated Al-Si-Cu cast aluminium alloys, using the high power diode laser (HPDL). The performed laser treatment involves remelting and feeding of ZrO2 ceramic powder into the aluminium surface. Based on the performed investigations it was possible to obtain the layer consisting of the heat affected zone, transition zone and remelted zone, without cracks and defects as well as has with a slightly higher hardness value compared to the non remelted material. The laser power range was chose as 1.5 to 2.0 kW and implicated by one process speed rate of 0.25 m/min. Also a powder size was used for alloying with the particle size of ca. 100 μm. The hardness value increases according to the laser power used so that the highest power applied gives to highest hardness value in the remelted layer [1-8]. The carried out investigations allow to conclude, that as a result of alloying of the heat-treated cast aluminium alloys with oxide ceramic powder the surface layer can be enriched with the powder particle and in some cases a high-quality top layer is possible to obtain. Very often to determine conditions of laser treatment are being used the numerical methods that would significantly shorten the time to find the most optimal parameters. [8]. Concerning original practical implications of this work there was important to investigate the appliance possibility of High Power Diode Laser (HPDL) for enhancement of the aluminium surface properties, especially the wear resistance and hardness. the scientific reason was also to describe structure changes and processes occurred in the laser remelted surface aluminium layer after ZrO2 feeding using HPDL laser [10-1. .

High Power Diode Laser Application for Metals Surface Treatment Based on Wear Resistance Investigation

2014 ◽  
Vol 1036 ◽  
pp. 482-489 ◽  
Author(s):  
Krzysztof Labisz ◽  
Ewa Jonda ◽  
Tomasz Tański ◽  
Wojciech Borek ◽  
Małgorzata Czaja
Keyword(s):  
Wear Resistance ◽  
Boron Nitride ◽  
Surface Treatment ◽  
Tungsten Carbide ◽  
Diode Laser ◽  
High Power ◽  
Cast Alloy ◽  
Material Surface ◽  
Power Diode ◽  
High Power Diode Laser

This paper presents the results of laser remelting influence on structure and properties of the surface of the AlSi9Cu2 aluminium cast alloy as well as X40CrMoV5-1 and 32CrMoV12-28 hot work tool steels, carried out using the high power diode laser (HPDL). Structure changes were determined in the work, especially structure of the surface after wear resistance test. Also hardness investigation of the different remelting areas was performed. The reason of this work was also to determine the laser treatment parameters, particularly the laser power, to achieve a good layer hardness for protection of this constructional and tool materials from losing their work stability and to make the material surface more resistant for work extreme conditions. Tungsten carbide and boron nitride powder was used for alloying. The goal of this work was also to determine technical and technological conditions for remelting the surface layer with HPDL. The remelted layers which were formed on the surface of the investigated aluminium and steels were examined metallographic and analysed using a hardness and wear resistance testers. Key words: Wear resistance, HPDL treatment, aluminium alloys, tool steel, remelting, alloying, surface treatment, boron nitride, tungsten carbide.

Laser Surface Treatment of Cast Aluminium-Silicon Alloys

2018 ◽  
Vol 275 ◽  
pp. 30-40
Author(s):  
Krzysztof Labisz ◽  
Tomasz Tański
Keyword(s):  
Surface Layer ◽  
Laser Treatment ◽  
Diode Laser ◽  
High Power ◽  
Laser Power ◽  
Ceramic Powder ◽  
Surface Hardness ◽  
Cast Aluminium ◽  
Power Diode ◽  
High Power Diode Laser

The reason of performing the investigations carried out in this work was to investigate the microstructure of the laser treated Al-Si-Cu cast aluminium alloy with the ceramic powder particles using High Power Diode Laser (HPDL) for remelting, and/or alloying. First of all the feeding and distribution of the powder in the surface layer of the alloyed and remelted AlSi7Cu material. Very important issue is the determination of the laser treatment parameters, especially the powder feeding rate, laser power, and scan rate to achieve an enhancement of the layer hardness for ensuring this cast aluminium alloy from losing their working properties and to achieve the tool surface is more resistant to wear. The purpose of this work was also to determine technological and technical conditions comparison for the Al2O3 and SiC ceramic powder alloyed into the surface layer with High Power Diode Laser. There are presented also the investigation results about the determination of proper technical condition during the laser treatment, especially the laser head distance and shielding gas influence. The presented results concerns first of all the structure investigation of the obtained surface layer allowing it to achieve an enhanced hardness and wear resistance more resistant for work, special attention was devoted to monitoring of the layer morphology of the investigated material and on the particle occurred. Light (LM) and scanning electron microscopy (SEM) were used to characterize the microstructure of the obtained surface zones - the remelted zone (RZ) and heat affected zone (HAZ), the ceramic powder distribution and intermetallic phases occurred. A wide range of laser power values was applied and implicated with different laser scan rates. The powders in form of ceramic powders used for alloying were chosen with the particle size of ca. 60μm. This study was conducted to investigate the influence carbide and oxide powder addition on structure and mechanical properties as well the and structure changes occurred during the rapid solidification process. The investigation ensures to use laser treatment for alloying/feeding of ceramic powder particles into the surface of light alloys. The scientific reason of this work is the applying of High Power Diode Laser (HPDL) for improvement of aluminium`s mechanical properties, especially the surface hardness. As the main findings was determined that the obtained surface layer is homogeny without cracks and has a comparably higher hardness value compared to non-treated material. The surface hardness increases together with the applied laser power, the highest power applied gives the highest hardness value for the surface. Also the distribution of the ceramic particles is proper, but there a need for further modelling, because the hardness increases in general according to the laser power used so that the highest power applied gives to highest hardness value in the remelted layer, but for other powder amount or alloy the values should be determined separately, and more data would be necessary to create a model for the technique appliance. The practical purpose of this work is to analysis the impact and application possibility of HPDL laser surface treatment on the cast Al-Si-Cu alloys to deliver application possibilities for diverse branches of industry.

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