Development of a Laser Cladding Process for Shrouded Turbine Blades

1989 ◽  
Author(s):  
Michael lovene ◽  
Mark Everett
Keyword(s):  
Laser Cladding ◽  
Turbine Blades ◽  
Laser Cladding Process

scholarly journals Influence Of Laser Cladding on Behavior of Fatigue and Fatigue Corrosion

2022 ◽  
Vol 961 (1) ◽  
pp. 012035
Author(s):  
Zaman A. Abdulwahab ◽  
Sami A. Ajeel ◽  
Sami I. Jafar
Keyword(s):  
Laser Cladding ◽  
Turbine Blades ◽  
Average Power ◽  
Pulse Frequency ◽  
Jet Engines ◽  
Inconel 600 ◽  
Laser Cladding Process ◽  
Wide Range ◽  
Before And After ◽  
Fatigue Corrosion

Abstract Nickle based super alloys such as Inconel 600 are being extensively used to manufacture turbine blades for jet engines since their superior mechanical characteristics at higher working temps. The chemical composition of steam turbine blades show that is steel 52 it has a wide range of Energy, Tanks, Rail, Yellow Goods, Engineering, Bridges, Construction, applications. Laser cladding seems to be a surfacing method that uses lasers to improve the characteristics of a component’s surface and/or renew it. Laser cladding involves absorption of laser light that melts a small area of the substrates against which the substance was being introduced and fuses the coating substance to the substrates, resulting in the formation of a new layer. This research aims to investigate the fatigue and fatigue corrosion behavior of these turbine blades before and after exposure to laser cladding. The cladding process applied with this parameter Pulse energy = 11 joules, Pulse width = 6 Ms., Pulse frequency = 12 Hz, Laser Average Power = 132 W, Laser peak power = 1.83 KW. The results show, after cladding process the microstructure of the specimen is smooth and increase the cyclic of fatigue comparison with specimen without laser cladding process. So, the fatigue resistance is increased.

INCONEL® 625 WIRE LASER CLADDING: PROCESS PARAMETRIZATION TO PRODUCE HIGH QUALITY COATINGS FOR METALWORKING INDUSTRY

2017 ◽  
Author(s):  
Viviane Kettermann Fernandes ◽  
Alexander Lauffs ◽  
Adriano de Souza Pinto Pereira ◽  
Jhonattan Gutjahr ◽  
Milton Pereira ◽  
...  
Keyword(s):  
Laser Cladding ◽  
High Quality ◽  
Metalworking Industry ◽  
Laser Cladding Process

scholarly journals Characterization of the Structure, Mechanical Properties and Erosive Resistance of the Laser Cladded Inconel 625-Based Coatings Reinforced by TiC Particles

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2225
Author(s):  
Aleksandra Kotarska ◽  
Tomasz Poloczek ◽  
Damian Janicki
Keyword(s):  
Laser Cladding ◽  
Inconel 625 ◽  
Matrix Composites ◽  
Erosion Rates ◽  
Laser Cladding Process ◽  
Composition Variation ◽  
The Matrix ◽  
Reinforcing Material ◽  
Inconel 625 Superalloy

The article presents research in the field of laser cladding of metal-matrix composite (MMC) coatings. Nickel-based superalloys show attractive properties including high tensile strength, fatigue resistance, high-temperature corrosion resistance and toughness, which makes them widely used in the industry. Due to the insufficient wear resistance of nickel-based superalloys, many scientists are investigating the possibility of producing nickel-based superalloys matrix composites. For this study, the powder mixtures of Inconel 625 superalloy with 10, 20 and 40 vol.% of TiC particles were used to produce MMC coatings by laser cladding. The titanium carbides were chosen as reinforcing material due to high thermal stability and hardness. The multi-run coatings were tested using penetrant testing, macroscopic and microscopic observations, microhardness measurements and solid particle erosive test according to ASTM G76-04 standard. The TiC particles partially dissolved in the structure during the laser cladding process, which resulted in titanium and carbon enrichment of the matrix and the occurrence of precipitates formation in the structure. The process parameters and coatings chemical composition variation had an influence on coatings average hardness and erosion rates.

Online cracking detection by means of optical techniques in laser-cladding process

2018 ◽  
Vol 26 (3) ◽  
pp. e2291 ◽  
Author(s):  
Aitor García de la Yedra ◽  
Michael Pfleger ◽  
Benat Aramendi ◽  
Marcos Cabeza ◽  
Fidel Zubiri ◽  
...  
Keyword(s):  
Laser Cladding ◽  
Optical Techniques ◽  
Laser Cladding Process

scholarly journals Optimization of laser cladding process for additive repair of high temperature and high pressure valve sealing surface

2019 ◽  
Author(s):  
Lei Che
Keyword(s):  
High Pressure ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Laser Cladding ◽  
Laser Power ◽  
Feeding Rate ◽  
Scanning Speed ◽  
Alloy Layer ◽  
Laser Cladding Process ◽  
Valve Sealing

Laser cladding technology is highly suitable for the remanufacturing of thin-walled and easily deformable parts due to its concentrated energy density. Due to the high temperature and high pressure corrosion environment, the valve sealing surface is prone to corrosion, wear and other failures. A nickel-based tungsten carbide alloy layer was prepared on the valve sealing surface substrate material by laser cladding process. By designing orthogonal experiments, the effects of laser power (P), scanning speed (Vb), powder feeding rate (Vf), and WC content (wt%) on the alloy layer were investigated. A fuzzy comprehensive evaluation method including macroscopic quality, microstructure, microhardness, anti-wear performance, oxidation resistance, compactness and corrosion resistance was proposed. The experimental results showed that the hardness, oxidation resistance and corrosion resistance of the laser alloy layer are significantly improved compared with the matrix; the optimum process parameters and the addition ratio of WC powder are laser power (P) of 1.1 kW and scanning speed (Vb) of 800 mm/min. The powder feeding rate (Vf) was 20%, and the WC content was 20% by weight.

The Optimization of Processing Parameters and Experimental Investigation on Ni-Based Components Fabricated by Laser Cladding

2009 ◽  
Vol 407-408 ◽  
pp. 676-679
Author(s):  
Xia Ji ◽  
Jian Zhong Zhou ◽  
Feng Qiu ◽  
Su Qing Jiang
Keyword(s):  
Experimental Investigation ◽  
Surface Quality ◽  
Laser Cladding ◽  
Primary Dendrite ◽  
Processing Parameters ◽  
Reheat Cracking ◽  
Statistical Analysis System ◽  
Laser Cladding Process ◽  
Superior Surface ◽  
Analysis System

The optimization of processing parameters for laser cladding process based on Statistical Analysis System (SAS) software was investigated and the experimental investigation on Ni-based alloy components fabricated by laser cladding was carried out. The influences of the main processing parameters on the surface quality were analyzed, and the Ni-based components with superior surface quality were obtained by employing the optimum set of parameters. The surface morphology and microstructure of the components were analyzed. Results indicate that the surface of the cladding is rather smooth and the claddings have a unique microstructure consisting of primary dendrite. The laser cladding layer with integrated melt interface and without reheat cracking can be obtained by optimizing the process variables. The investigations show that the components fabricated by laser cladding process have better mechanical properties than that of the conventional manufacturing technology.

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