Effect of laser power and powder feeding on the microstructure of laser surface alloying hardened H13 steel using SKH51 powder

Lee, Kwang-Hyeon; Choi, Seong-Won; Suh, Jeong; Kang, Chung Gil

doi:10.1016/j.matdes.2016.01.079

Cited by 18 publications

(6 citation statements)

References 15 publications

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“…It can clearly be observed from Figure 2(a) and (b) that the penetration depth of the coating into the substrate is larger with the coating at 900 W than the penetration associated with coating deposited at 750 W. As the heat input is raised due to increased laser power, the cladding materials tend to fuse with larger areas from the substrate, this, therefore gives rise to a larger interfacial band; the dilution zone. This is in line with the observation of [29, 30]. The works of [30] reveals that at higher laser power the depth penetration of the laser beam increased compare to lower power.…”

Section: Resultssupporting

confidence: 90%

“…At higher laser power, hardness value increases with respect to values exhibited at low laser power. In contrast, it was stated according to [29] that increase in laser power decreases average hardness, due to differences in mircostructure activated by lengthening cooling speed of the alloy layer under a higher laser power. However, this work poses a counteracting phenomenon with the average microhardness of the cladding zone on laser power 900 and 750 W as 683.46 HV and 672.65 HV, respectively.…”

Section: Resultsmentioning

confidence: 90%

“…At higher laser power, hardness value increases with respect to values exhibited at low laser power. In contrast, it was stated according to [29] that increase in laser power decreases average hardness, due to differences in mircostructure activated as a result of low-energy density required to melt and fuse the hardening particles of cobalt with the matrix.…”

Section: Influence Of Laser Power On the Microhardnessmentioning

confidence: 96%

“…It was mentioned that the formability and depth of the coatings is very sensitive to the laser power [31]. Lee et al stated that increase in laser power decreases average hardness due to differences in mircostructure activated by lengthen cooling speed of the alloy layer under a higher laser power [29].…”

Section: Phase Composition Analysismentioning

confidence: 99%

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A study on the influence of laser power on microstructural evolution and tribological functionality of metallic coatings deposited on Ti-6Al-4V alloy

Adesina

Popoola

2017

Tribology - Materials, Surfaces & Interfaces

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Metallic Ti-Co binary coatings were fabricated on titanium alloy (Ti-6Al-4V) substrate by laser surface cladding technique using a continuous wave RofinSinar 4 kW Nd: YAG laser. The influence of laser power on microstructure, hardness and tribological performance of Ti-Co laser clad coatings on titanium alloy (Ti-6Al-4V) was examined. Laser powers of 750 and 900 W were varied with constant scan speed of 1.2 m/min. A beam size of 3 mm and argon shield gas flow rate of 1.2 L/min were set as the operating laser parameters. Phase identification and morphological studies of the coatings were carried out using X-ray diffractometry (XRD) and scanning electron microscopy (SEM), respectively. Based on the results of laser process optimisation, it was observed that both laser powers produced clad coatings with good metallurgical bond with no cracks or pores in the coatings. With respect to the substrate (Ti-6Al-4V), the microstructure, hardness and friction/wear behaviour of Ti-Co coatings on Ti-6Al-4V substrate were enhanced obviously.

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Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 90%

“…At higher laser power, hardness value increases with respect to values exhibited at low laser power. In contrast, it was stated according to [29] that increase in laser power decreases average hardness, due to differences in mircostructure activated as a result of low-energy density required to melt and fuse the hardening particles of cobalt with the matrix.…”

Section: Influence Of Laser Power On the Microhardnessmentioning

confidence: 96%

Section: Phase Composition Analysismentioning

confidence: 99%

See 2 more Smart Citations

A study on the influence of laser power on microstructural evolution and tribological functionality of metallic coatings deposited on Ti-6Al-4V alloy

Adesina

Popoola

2017

Tribology - Materials, Surfaces & Interfaces

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“…Microstructural refinement will improve the thermo-mechanical fatigue and the wear resistance of the work rolls in the HSM. Such refinement of the microstructure can be achieved by laser cladding process as of relatively high cooling rates [18,19].…”

Section: Introductionmentioning

confidence: 99%

Development and characterization of multilayer laser cladded high speed steels

Rahman¹,

Capuano²,

Meer³

et al. 2018

Additive Manufacturing

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Two high speed steel (HSS) alloys were laser cladded on 42CrMo 4 steel cylindrical substrate by using a 4 kW Nd:YAG laser source. After optimization of the laser material processing parameters for single layers, multilayered clads were produced. Microstructural characterization of the laser deposits constitutes studies of the carbides and matrix, which was done by using Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), Electron Backscattered Diffraction (EBSD) and High Resolution Transmission Electron Microscopy (HRTEM). The strengthening mechanism of LC1 (Fe-Cr-MoW -V) was comprised of a martensitic matrix and retained austenite along with networks of VC and Mo 2 C eutectic carbides. Cr enriched fine carbides (Cr 7 C 3 and Cr 23 C 6) were embedded within the matrix. During laser cladding of the multilayer

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Surface–Interface Microstructures and Friction-Wear Performances of Thermal Sprayed FeCrBSi Coatings Obtained by High-Velocity Oxygen Fuel Process

Liu

Tianyuan

Dejun

2017

Powder Metall Met Ceram

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Effect of laser power and powder feeding on the microstructure of laser surface alloying hardened H13 steel using SKH51 powder

Cited by 18 publications

References 15 publications

A study on the influence of laser power on microstructural evolution and tribological functionality of metallic coatings deposited on Ti-6Al-4V alloy

A study on the influence of laser power on microstructural evolution and tribological functionality of metallic coatings deposited on Ti-6Al-4V alloy

Development and characterization of multilayer laser cladded high speed steels

Surface–Interface Microstructures and Friction-Wear Performances of Thermal Sprayed FeCrBSi Coatings Obtained by High-Velocity Oxygen Fuel Process

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