Effect of Thermal Fields on the Structure of Corrosion-Resistant Steels Under Different Modes of Laser Treatment

Tarasova, Tatiana; Gusarov, A.V.; Protasov, K. E.; Filatova, A.

doi:10.1007/s11041-017-0168-z

Cited by 8 publications

(3 citation statements)

References 8 publications

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“…Laser irradiation permits the creation of the high densities of heat flow in a small surface area necessary for intense heating or melting of metallic materials [23][24][25]. The occurring effects of the interaction between the beam and the metal depend on the ratio of exposure time to relaxation time, as well as on the power density of the laser beam during processing of alloys [26][27][28].…”

Section: Optical Systems For the Shaping Of Laser Beamsmentioning

confidence: 99%

Analysis of the Advantages of Laser Processing of Aerospace Materials Using Diffractive Optics

Murzin

Kazanskiy

Stiglbrunner

2021

Metals

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We considered possibilities of an application of diffractive free-form optics in laser processing of metallic materials in aerospace production. Based on the solution of the inverse problem of heat conduction, an algorithm was developed that calculates the spatial distribution of the power density of laser irradiation in order to create the required thermal effect in materials. It was found that the use of diffractive optics for the laser beam shaping made it possible to obtain specified properties of processed materials. Laser thermal hardening of parts made of chrome–nickel–molybdenum steel was performed. This allowed us to increase the wear resistance due to the creation in the surface layer of a structure that has an increased hardness. In addition, a method of laser annealing of sheet materials from aluminum–magnesium alloy and low-alloy titanium alloys was developed. Application of this method has opened opportunities for expanding the forming options of these materials and for improving the precision in the manufacturing of aircraft engine parts. It was also shown that welding by a pulsed laser beam with a redistribution of power and energy density makes it possible to increase the strength of the welded joint of a heat-resistant nickel-based superalloy. Increasing the adhesion strength of gas turbine engine parts became possible by laser treatment using diffractive free-form optics.

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Section: Optical Systems For the Shaping Of Laser Beamsmentioning

confidence: 99%

Analysis of the Advantages of Laser Processing of Aerospace Materials Using Diffractive Optics

Murzin

Kazanskiy

Stiglbrunner

2021

Metals

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“…Selective laser melting uses a wide range of materials. Using such materials as aluminum alloys, corrosion-resistant steels, and cobalt-based alloys it is possible to obtain a high complexity of physicomechanical properties of products made by the SLM method [7,8,9,10,11,12].…”

Section: Introductionmentioning

confidence: 99%

Possibilities of Manufacturing Products from Cermet Compositions Using Nanoscale Powders by Additive Manufacturing Methods

et al. 2019

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Complicated wear-resistant parts made by selective laser melting (SLM) of powder material based on compositions of metal and ceramics can be widely used in mining, oil engineering, and other precision engineering industries. Ceramic–metal compositions were made using nanoscale powders by powder metallurgy methods. Optimal regimes were found for the SLM method. Chemical and phase composition, fracture toughness, and wear resistance of the obtained materials were determined. The wear rate of samples from 94 wt% tungsten carbide (WC) and 6 wt% cobalt (Co) was 1.3 times lower than that of a sample from BK6 obtained by the conventional methods. The hardness of obtained samples 2500 HV was 1.6 times higher than that of a sample from BK6 obtained by the traditional method (1550 HV).

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“…This led to the emergence of combined technologies that use different principles of influence on metal in the process of forming semi-finished and finished products. These include chemical-thermal, thermo-mechanical and thermo-cycling treatments [6][7][8][9], as well as the combination of heat treatment and physical methods, such as laser irradiation, ultrasonic and electromagnetic field treatment [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Improving Strength of Structural Steels by Preheating in an Oxygen-Containing Medium

Afanasyev

Popova

Zhibinova

2019

MSF

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The results of the preliminary heat treatment effecting in a medium with a high oxygen content on the microstructure and mechanical properties of structural steels are presented. It is shown that the usage of preheating in the glass mass in the range of (Ac130°C) – Ac1for steels of grades 50 and 40H leads to the formation of a structure with dispersed granular pearlite and crushed excess ferrite precipitates. Such a structure, when heated for quenching, provides rapid formation of a homogeneous austenite and a delay in the growth of austenite grain, which provides the best combination of strength and plasticity after the final heat treatment. It is established that the tensile strength increases 1.2-1.3 times while maintaining the plasticity characteristics. The reliability of the obtained estimates of the mechanical property characteristics is confirmed by the results of a statistical analysis.

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Effect of Thermal Fields on the Structure of Corrosion-Resistant Steels Under Different Modes of Laser Treatment

Cited by 8 publications

References 8 publications

Analysis of the Advantages of Laser Processing of Aerospace Materials Using Diffractive Optics

Analysis of the Advantages of Laser Processing of Aerospace Materials Using Diffractive Optics

Possibilities of Manufacturing Products from Cermet Compositions Using Nanoscale Powders by Additive Manufacturing Methods

Improving Strength of Structural Steels by Preheating in an Oxygen-Containing Medium

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