Analysis of Al-Si Layer on Steel Sheet during Thermo Mechanical Processing Using Microscopic Methods

Kuśmierczak, Sylvia; Slavík, Michal

doi:10.21062/ujep/175.2018/a/1213-2489/mt/18/5/769

Cited by 7 publications

(2 citation statements)

References 6 publications

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“…Hot-stamped steels, such as 22MnB5 steel, are widely utilised in critical vehicle body areas like crash beams and B-pillars to enhance intrusion resistance and energy absorption during collisions. Extensive investigations [20][21][22][23][24] have been conducted on the influence of surface layer on the microstructural evolution and performance of Al-Si coated 22MnB5 steel, as surface failure remains a predominant factor in mechanical part failures. 25 Research on 22MnB5 steel has predominantly focused on mechanical properties, processing optimisation and numerical simulations during hot stamping.…”

Section: Introductionmentioning

confidence: 99%

Phase transformation and microstructural evolution of coating layer of Al–Si coated 22MnB5 steel during thermal diffusion

Chen,

Hao,

Chen

et al. 2024

Ironmaking & Steelmaking: Processes, Products and Applicati

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Thermal diffusion experiments were conducted at 900 °C on Al–Si coated 22MnB5 steel to investigate phase composition and transformation. Results revealed that several compound phases, including Fe2Al7Si, FeAl3, (Al, Si)5Fe3 and Fe2Al5, observed beneath the eutectic structure in the Al–Si coating. At 900 °C, the eutectic structure is almost completely diffused over time. During thermal diffusion experiments, Fe element diffused into the coating, while Al and Si elements diffused within the coating and into the steel matrix. Electron backscatter diffraction analysis identified the phases of the Al–Si coating at different diffusion times at 900 °C, revealing a three-stage phase transition process, including diffusion of the Al–Si eutectic structure, formation of the Fe–Al (Si) phase, formation of the FeAl2 phase.

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Section: Introductionmentioning

confidence: 99%

Phase transformation and microstructural evolution of coating layer of Al–Si coated 22MnB5 steel during thermal diffusion

Chen,

Hao,

Chen

et al. 2024

Ironmaking & Steelmaking: Processes, Products and Applicati

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“…Most fluxes contain fluoride compounds such as Na3AlF6, CaF2, Na2SiF6, which accelerate wettability [8][9][10]. Heterogeneous nucleation of pores in inclusions is highly probable [11][12][13]. The high interfacial energy between the inclusions and the molten aluminum causes the concentration of dissolved hydrogen and then the formation of hydrogen (H2) molecules in the melt [14], which is.…”

Section: Introductionmentioning

confidence: 99%

The formation and elimination of the negative influence of porosity on the properties of the alloy castings AlSi10Mg

Hren¹,

Luňák²,

Kuśmierczak³

2020

Manufacturing Technology

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Aluminum alloys are often contaminated with non-metallic inclusions. A large number of these phases accelerate the tendency of porosity in castings, significantly reduce corrosion resistance and above all affect mechanical properties. Melting is one of the conventional methods for removing inclusions from melt. The efficiency of this process is influenced by several parameters such as the chemical composition of the melt, the amount of refining substances (wire, salts, tablets), the melting point and the casting method. Therefore, an experiment was performed to evaluate the effect of PROBAT FLUSS MIKRO 100 on the structural integrity in AlSi10Mg alloy. Porosity evaluation was performed by light microscopy. To confirm the results and their reflexes into the practical production of castings, a static tensile test was performed on the cast samples directly in the foundry operation.

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The modification of surface of barrels by gas nitriding

Pokorny¹,

Dobrocký²,

Joska³

2020

Manufacturing Technology

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Steels which are used for manufacturing of highly stressed parts of military equipments such as barrels of small arms weapons must be modified by heat treatment due to achieve required mechanical properties. Moreover, other important properties of functional parts, especially a friction coefficient and surface parameters of bore of barrels, must be optimized due to obtain the best accuracy in target and to increase the life time of barrel [1, 2]. The technology chromium plating, very widespread in the past, has been gradually replacing by more ecological methods. This article is devoted to find a technology as a replacement of traditional chromium plating. Experiments are focused on using of optimized gas nitriding processes for surface treatment. As a result, a higher surface hardness with low influence on the dimensional accuracy is expected. Gas nitriding process was applied to steels 42CrMo4 and 32CrMoV12-10 used for barrel manufacturing. The most important parts of barrel were evaluated, especially surface parameters as a morphology then chemical composition and naturaly a microstructure of the material. The analysis of surface morphology was performed by scanning electron microscopy; chemical composition was evaluated by GDOES method and mechanical properties by using microhardness methods. The measurements of depth of diffusion layer were performed by destructive and non-destructive methods. The measurements showed the influences of chemical composition of alloying elements in core of material after chemical-heat treatment process on depth of diffusion and influence of technology on development of porosity. All fundamental mechanical properties significant for requiring function of barrel were documented [1, 2]. Nevertheless, the main task was the description of the porosity development in compound layer after gas nitriding and the increasing of surface hardness and the depth of diffusion layer according to chemical composition. Nitriding process was applied for increasing of surface hardness of material in depth and improving of mechanical properties. Mechanical properties of tested material were significantly increased.

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Analysis of Al-Si Layer on Steel Sheet during Thermo Mechanical Processing Using Microscopic Methods

Cited by 7 publications

References 6 publications

Phase transformation and microstructural evolution of coating layer of Al–Si coated 22MnB5 steel during thermal diffusion

Phase transformation and microstructural evolution of coating layer of Al–Si coated 22MnB5 steel during thermal diffusion

The formation and elimination of the negative influence of porosity on the properties of the alloy castings AlSi10Mg

The modification of surface of barrels by gas nitriding

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