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Medvedev, Alexander M.; Mazurenko, Ievgen; Vrochinskii, S. L.; Nazarenko, Sergey; Molyar, A. G.

doi:10.1023/a:1027328317949

Cited by 10 publications

(3 citation statements)

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“…In such cases, protective coatings can be applied, whose task is to separate the surface from the reactive atmosphere of oxygen. It can be pastes or liquids with various contents used to cover the material surface [9]. The most popular coating techniques are submerging, application with a brush, spraying, and lubrication.…”

Section: Introductionmentioning

confidence: 99%

Development of Induction Heating System Ensuring Increased Heating Efficiency of the Charge Material in a Forging

Hawryluk

Rychlik²,

Pietrzak

et al. 2022

Materials

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This study performs a complex analysis and review of the currently applied methods of inductively heating the charge material in hot die forging processes, as well as elaborates and verifies a more effective heating method. On this basis, a device for inductive heating using variable frequency inductors was designed and constructed, which made it possible to reduce the scale and decarburization with respect to the heater used so far. In the first place, the temperature distributions in the heater in the function of time were modeled with the use of the CEDRAT FLUX software. The aim of the research was to analyze the temperature gradient and value diversification on the surface and in the material core, as well as to determine the process stability. The following stage was designing and constructing a heater with an automatic system of loading and positioning of the charge on the exit, as well as with a possibility of working in a fully automated system adjusted to the work center. The last stage of investigations was the verification of the elaborated effective heating method on the basis of a short production series and a continuous work for the period of 8 h, both in the quantitative and qualitative aspect (reduced oxidation and decarburization as well as a gradient between the core and the surface). The obtained results confirm the effectiveness of the proposed solution referring to heating the charge material, especially in the aspect of stability and repeatability of the process, as well as a significant reduction in oxidation and decarburization of the material surface.

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Section: Introductionmentioning

confidence: 99%

Development of Induction Heating System Ensuring Increased Heating Efficiency of the Charge Material in a Forging

Hawryluk

Rychlik²,

Pietrzak

et al. 2022

Materials

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show abstract

“…Results of the heating process also relate to properties of a surface of the material which goes into the furnace. Spotless surface means better heating results [6].…”

Section: Introductionmentioning

confidence: 99%

“…Another group of protectives consists of pastes based on zircon. They are equally high heat resistant, up to 1800 • C, and thermal shocks resistant [6]. Another method of protecting a surface from decarburization and oxidation over the heating process is using ATP (Adenosine Triphosphate) coatings.…”

Section: Introductionmentioning

confidence: 99%

Case Study of the Effect of Precoating on the Decarburization of the Surface Layer of Forged Parts during the Hot Die Forging Process

et al. 2021

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This paper aims to evaluate the effect of pre-coating of forged parts on decarburization in the die forging process. The studies consisted of three stages. In the first instance, different coatings were tested under laboratory conditions by heating steel samples to the temperature of 1200 °C for over five minutes to model the preheating conditions of the induction. Next, testing continued in a commercial forging stand where we tested the effects of different coatings on the rods decarburization during the induction heating process, usually performed before forging. Once completed testing, the measurements and observations of the decarbonized layer were made. The third stage involved analysis of the decarburization of the forged parts after forging. The forged parts were made using precoating of pre-forging elements; pieces cut off a metal rod. Based on tests results, the possibility of using this solution in the technique of industrial hot forging was evaluated. The results of laboratory tests have confirmed that lubrication of metal pieces is sufficient, as well as proved it to be effective in reducing decarburization of the surface layer. Research works conducted in an induction heater showed differences in decarburization depending on a substance and concentration of lubricants that were used. These differences become more apparent when observing the surface layer of the forged parts. Results indicate that decarburization may be reduced to a minimum when we use Bonderite product in a concentration of 66% and 50%. Another lubricant, Berulit 913, may also be used. However, due to burning graphite in high temperatures, reduction of decarburization goes only as far as half of the thickness of the decarbonized layer. Condursal has no significant effect; nevertheless, it protects over the induction heating stage.

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Protective Bauxite-Based Coatings and Their Anti-decarburization Performance in Spring Steel at High Temperatures

Wang

Wei

Zhou

et al. 2012

J. of Materi Eng and Perform

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Cited by 10 publications

References 0 publications

Development of Induction Heating System Ensuring Increased Heating Efficiency of the Charge Material in a Forging

Development of Induction Heating System Ensuring Increased Heating Efficiency of the Charge Material in a Forging

Case Study of the Effect of Precoating on the Decarburization of the Surface Layer of Forged Parts during the Hot Die Forging Process

Protective Bauxite-Based Coatings and Their Anti-decarburization Performance in Spring Steel at High Temperatures

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