Research on microstructural and property evolution in laser cladded HAZ

Pan, Cunliang; Li, Xiaoqiang; Zhang, Ruihua; Lu, Chenyang; Chao, Yang; Yao, Dengzhi

doi:10.1080/02670844.2021.1929737

Cited by 5 publications

(3 citation statements)

References 24 publications

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“…No heat affected zone It can be observed that microstructure is very similar in both cases (Figure 5a and 5b). The solidification features are in accordance with the literature [24][25][26][27]. A nucleation phase, characterized by small equiaxed grains, is evidenced at the interface, then a columnar growth directed mainly parallel to the <001> direction of the dendrites is observed (Figure 5a).…”

Section: Microstructure Features and Associated Chemical And Mechanic...supporting

confidence: 89%

Formation of a joint between deposited and base metals during laser cladding of a nickel-based powder onto a copper-based alloy

Bourahima¹,

Baudin²,

Rege³

et al. 2022

The Paton Welding J.

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Laser metal deposition (LMD) is an alternative method to other cladding techniques such as Plasma Transfer Arc (PTA) or blowtorch for surface treatment in the glass industry. It aims to produce dense, high-quality coatings on a non-planar surface without affecting its thermal and mechanical properties. In this study, Ni-based coatings were coated onto Cu-Ni-Al substrate using a 3 JET nozzle technique. During laser cladding, good metallurgical bonding is necessary to ensure the further surfacing process technique. A microstructural analysis was conducted, and the mechanical properties were then evaluated with microhardness analysis to link process parameters to coating bonding quality. A calculation of the power attenuation attempts to explain the impact of the powder distribution on the bonding. This work revealed that a chemical dilution zone exists between coating and substrate and is necessary for perfect metallurgical bonding. The heterogeneous bonding, observed through the section, along the curved interface coating/substrate, has been linked to the Gaussian distribution of the powder that attenuates the input power. The attenuated power was measured all along the interface.

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Section: Microstructure Features and Associated Chemical And Mechanic...supporting

confidence: 89%

Formation of a joint between deposited and base metals during laser cladding of a nickel-based powder onto a copper-based alloy

Bourahima¹,

Baudin²,

Rege³

et al. 2022

The Paton Welding J.

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“…Consequently, the corrosion cannot effectively be blocked, leading to low corrosion resistance of the microdimples edges. [ 25 ] Finally, the roundness of the microdimples of the samples in the low apparent‐microcrack group changed under the action of the corrosive medium. Corrosion products were deposited inside the microdimples after corrosion.…”

Section: Resultsmentioning

confidence: 99%

Corrosion Properties of Ni60/WC Coating with Abrasion‐Resistant Microdimples Ablated by Nanosecond Laser

Zhong

Wang

et al. 2022

Adv Eng Mater

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Herein, the influence of laser‐ablated cracks in microdimples on the corrosion properties of Ni60/tungsten carbide (WC) coating is investigated. It is based on the dimension parameters of circular microdimples, which is optimized by unit and full‐size friction‐wear experiments for a textured plunger and sealed‐disk assembly element. The Poisson distribution is used to perform the statistical and characterization analyses of the microcrack defects on the surface of Ni60/WC coating with the circular microdimples ablated by the nanosecond laser. The key process parameters of laser machining in groups with a high and a low ratio of apparent microcrack are selected, and are compared with the nontextured group on the coating surface through immersion–corrosion and electrochemical–corrosion tests. It finds the high and low apparent‐microcrack groups under the action of static corrosion, and the coating has the similar corrosion behavior with the nontextured group. When apparent microcrack does not extend to the substrate, the nanosecond‐laser ablation of microdimples does not change the coating corrosion properties. Moreover, the corrosion properties of the coating are improved by laser ablation recrystallization. The experimental support is provided in the results for the application of microdimples on the surface of fracturing‐pump plunger coating in acidic environments.

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“…Also, they observed columnar and equiaxed dendritic grains in the direction of solidification. Pan et al [5] implemented 18Cr-0.2C Fe-powder on AISI420 stainless steel substrate using laser cladding method. Microstructure, phase transformations, mechanical properties, thermal cycle, corrosion properties were investigated.…”

Section: Introductionmentioning

confidence: 99%

Effect of Energy Input on Porosity and Microhardness in Laser Cladding Coating on Fgs600-3a Ductile Cast Iron

KARŞI¹,

Altay

ERGİN³

et al. 2022

METAL 2022 Conference Proeedings

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Laser cladding, which is surface modification technology, is based on melting with a laser beam by spraying powder on the base metal and generated by depositing the layers. In this study, the Metco 42C martensitic stainless steel powder material was cladded on the FGS600-3A ductile cast iron used in sheet metal forming molds. The effect of energy input on porosity and microhardness was investigated. The digital image processing method was used for porosity analysis. The energy input had a significant effect on the pore formation. The lower energy input (1.1 kW laser power, 14 mm/s scanning speed) resulted in lower porosity. The cladding thickness varied depending on the scanning speed parameter due to affecting powder efficiency, high thickness was obtained at 6 mm/s low scanning speed. In the upper layer of the cladding, high hardness values were achieved due to the martensitic phase formation. The bottom layers of cladding had lower hardness values because of the tempering of the hard martensitic phases by subsequent cladding processes. Significant increase in hardness at cladding zone was attributed to carbon transfer from the base metal. This remarkable increase in hardness was much higher at lowest energy input (1.1 kW laser power and 14 mm/s scanning speed). However, it is clear that this will increase the risk of crack formation because of brittleness. On the other hand, at the higher energy input, this significant increase in hardness is at a lower level due to rest-austenite formation and excessive annealing with subsequent cladding processes.

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Research on microstructural and property evolution in laser cladded HAZ

Cited by 5 publications

References 24 publications

Formation of a joint between deposited and base metals during laser cladding of a nickel-based powder onto a copper-based alloy

Formation of a joint between deposited and base metals during laser cladding of a nickel-based powder onto a copper-based alloy

Corrosion Properties of Ni60/WC Coating with Abrasion‐Resistant Microdimples Ablated by Nanosecond Laser

Effect of Energy Input on Porosity and Microhardness in Laser Cladding Coating on Fgs600-3a Ductile Cast Iron

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