Predominant Solidification Modes of 316 Austenitic Stainless Steel Coatings Deposited by Laser Cladding on 304 Stainless Steel Substrates

Apolinário, Luis Henrique Rodrigues; Wallerstein, D.; Montealegre, M. A.; Filho, Severino Leopoldino Urtiga; Ea, Torres; Hermenegildo, Tahiana Francisca da Conceição; Santos, Tiago Felipe de Abreu

doi:10.1007/s11661-019-05293-y

Cited by 19 publications

(15 citation statements)

References 45 publications

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“…Increase of the scanning speed may reduce dilution, since the amount of energy transferred to the substrate is lower at higher speed, so the dilution zone becomes smaller. However, increased dilution at higher speed has also been reported in studies of laser cladding and laser welding [7,22,30,31].…”

Section: Influence Of Laser Beam Power and Scanning Speed On Dilutionmentioning

confidence: 76%

“…Moradi et al [10], Sun et al [17], and Apolinario et al [7]. These studies indicated that the laser beam power and scanning speed were among the parameters with greatest influence on the final characteristics of the depositions produced by the laser cladding process.…”

Section: Methodsmentioning

confidence: 97%

“…In particular, austenitic and martensitic stainless steels are used where high performance is required [4,6]. Austenitic stainless steels are mostly used in components and equipment that need to be resistant to corrosion and oxidation at high temperature, such as in the chemical and petrochemical industries [4,[6][7][8]. Martensitic stainless steels are indicated for situations where high resistance to wear, cavitation, and erosion is required, so they are used for components such as propellers, valves, engine shafts, and steam turbines [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…Advantages of the laser cladding process, compared to competing processes, is that it can be used to produce complex components, offering high processing speed, high precision, potential for automation, and good repeatability. Despite a low thermal input, the technique provides a high energy density, while the heataffected zone is small [6,7,15,[17][18][19]. An important advantage of the process is the low dilution values that can be achieved.…”

Section: Introductionmentioning

confidence: 99%

“…The characteristics of the depositions in laser welding processes are influenced by variables including wavelength, beam diameter, power density, laser scanning speed, electromagnetic transverse mode, physical properties of materials (such as reflectivity and thermal diffusion), the type and flow of shielding gas, and the plasma induced by the laser [18,22]. These factors influence the geometric, microstructural, mechanical, and physicochemical characteristics of depositions [4,7,10,17]. Although laser cladding is now widely used in industry, appropriate control of the various process variables is essential for the treatment of different materials.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Laser Beam Power and Scanning Speed on the Macrostructural Characteristics of AISI 316L and AISI 431 Stainless Steel Depositions Produced by Laser Cladding Process

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et al. 2021

J. of Materi Eng and Perform

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In the laser cladding process, control of the process parameters and knowledge of the characteristics of the materials used are essential for obtaining depositions with excellent metallurgical union, satisfactory dilution values, absence of defects, and acceptable geometric characteristics. Without such precautions, depositions can exhibit low or excess dilution, low wettability, and the presence of pores, consequently reducing the performance of the materials. The aim of the present work was to evaluate the effects of the laser beam power, with maximum power of 4000 W and continuous wave mode, and scanning speed in laser cladding processes employing the AISI 316L austenitic stainless steel and the AISI 431 martensitic stainless steel, considering the geometric characteristics, dilution, and structural defects of the depositions. It was found that the laser power had a greater effect on the width and dilution of the depositions, while the scanning speed influenced the deposition height. The depositions of AISI 431 steel presented dilution values between 9 and 25%, using power settings between 1400 and 1600 W. The depositions of AISI 316L steel required higher power values between 1900 and 2600 W to achieve dilution values between 15 and 41%. The existence of pores and satisfactory hardness values were observed for both materials, with the average of microhardness of 522 HV0.5/15 and 356 HV0.5/15 on the AISI 431 and AISI 316L depositions. It was also found that the different characteristics of the addition metals, considering their morphology, particle size distribution, and flow rate, led to significant changes in the geometric features of the depositions.

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Section: Influence Of Laser Beam Power and Scanning Speed On Dilutionmentioning

confidence: 76%