Kinetics of oxyfuel gas cutting of steels

Adedayo, A.V.

doi:10.1590/s1678-58782011000200009

Cited by 6 publications

(4 citation statements)

References 15 publications

(16 reference statements)

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“…To find analytical solutions, thermophysical properties were assumed to be constant, the medium was considered as semi-infinite and latent heat effects were ignored. Concerning flame cutting per se, the oxyfuel gas cutting process was studied by Adedayo (Adedayo, 2011) who reported different chemical reactions taking place in the flame and Muñoz-Escalona et al (2006) investigated the influence of different type of gases and their process on cut quality of steel plates; both studies did not mention any heat associated with these reactions. Terasaki et al (2009) experimentally investigated the heat input and the distribution of heat generated by gas cutting.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical characterisation of heat flow during flame cutting of thick steel plates

Thiébaud

Drezet

Lebet

2014

Journal of Materials Processing Technology

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a b s t r a c tTemperatures measurements during flame cutting of a thick steel plate and measurements of the extension of the fusion and heat affected zones and Vickers hardness after cutting have been performed. Additionally, a 3-D thermal model for simulation of flame-cutting has been developed. For the sake of simplicity, the model depends only on two parameters: (i) the heat density within the flame, and (ii) the heat transfer coefficient within the air gap that forms behind the cut. The results show that the model is able to properly reproduce the measured temperature curves and the heat affected zone with an input power in the same range of those reported in the literature. A process efficiency of 26.5% is found in the steady state regime of flame-cutting.

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Section: Introductionmentioning

confidence: 99%

Experimental and numerical characterisation of heat flow during flame cutting of thick steel plates

Thiébaud

Drezet

Lebet

2014

Journal of Materials Processing Technology

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“…The microstructure of the edge "A" investigated from the external surface to the mid-wall plate was shown in Figure 5(a)-(b) and the microstructure transformation was obviously observed, indicating that these areas was heat-affected from the gas cutting process. Technically, the gas cutting process provides the preheat flame, which can raise the edge of the steel plate to about 980 o C so that the steel at the edge can be oxidized and then blown away (Adedayo, 2011). Obviously, the preheat temperature is above the transformation temperature, resulting in the transformation of ferrite/pearlite into austenite.…”

Section: Microstructure Examinationmentioning

confidence: 99%

Microstructural analysis of cracked steam drum plate during fabrication process

Peeratatsuwan,

Yingpaiboonsukh,

Chowwanonthapunya

2023

JART

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The understanding in the fracture mechanisms of the steel plate cracked during the fabrication is of paramount importance for the improvement of the fabrication process for the pressure-containing vessels like steam drum. This article presented the microstructural analysis of the fractured steam drum plate during the fabrication process. The analysis involved visual inspection, chemical analysis, micrograph study, tensile test, and impact test. Results exhibited that the failure of the steel plate was related to the brittle fracture, initiated from the notch, and propagated in the transverse direction perpendicular to the rolling direction. The formation of martensite was found in the affected area, which lowered the crack resistance of the steel plate. The cold worked conditions of the steel plate were induced by the pre-bending process and subsequently facilitated the fracture propagation. It is advised to conduct grinding process to remove the notch and the heat affected zone. Warming the steel plate to be significantly above 0oC is also suggested to perform prior to the fabrication process.

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“…The porosity in Al-Si alloy casting increases as the concentration of red mud increases up to 25% in sand mould casting [129]. Adedayo [130] used iron filings in a green sand mould casting. He observed that the mould properties like permeability, compressive, and shear strength is not affected by adding iron up to 5%.…”

Section: Other Waste Materialsmentioning

confidence: 99%

Challenges and Future Prospective of Alternative Materials to Silica Sand for Green Sand Mould Casting: A Review

Sadarang

Nayak

Panigrahi

2021

Trans Indian Inst Met

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Near-net shape casting having complex geometry is manufactured through the sand casting process. However, day by day, the availability of natural or synthetic silica sand has been decreasing and increasing the production cost of sand casting components. Therefore, there is a need to look into low-cost and readily available alternative materials to substitute the commercial-grade silica sand for the sand mould casting process. The constituent of silica sand is primarily silica (SiO 2 ), Al 2 O 3 , and Fe 2 O 3 . The major constituents of industrial wastes such as fly ash, blast furnace slag, ferrochrome slag, stone dust, and red mud have SiO 2 , Al 2 O 3 , and Fe 2 O 3 . Therefore, industrial wastes may be used individually or combined with silica sand at a different ratio to substitute the commercialgrade silica sand in green mould castings. Researchers and scientists have evaluated the suitability of industrial wastes and local riverbed sand as an alternative material for green sand mould castings. The present review summarizes the advantages and constraints of using industrial wastes and local riverbed sand as an alternative to green sand mould casting process.

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Kinetics of oxyfuel gas cutting of steels

Cited by 6 publications

References 15 publications

Experimental and numerical characterisation of heat flow during flame cutting of thick steel plates

Experimental and numerical characterisation of heat flow during flame cutting of thick steel plates

Microstructural analysis of cracked steam drum plate during fabrication process

Challenges and Future Prospective of Alternative Materials to Silica Sand for Green Sand Mould Casting: A Review

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