Influence of Preheat Flux on the Microstructure of 304 Stainless Steel

Adam Umar Alkali; Turnad Lenggo Gintar; Hasan Fawad; Ahmad Majdi Abdulrani

doi:10.4028/www.scientific.net/AMM.465-466.1287

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 465-466Influence of Preheat Flux on the Microstructure of...

Influence of Preheat Flux on the Microstructure of 304 Stainless Steel

Abstract:

An experimental investigation had been carried out for heating-only on samples of type 304 stainless steel with oxyacetylene gas flame set to neutral flame with temperature 2700⁰-3300°C. The flame effect on surface integrity was investigated in terms of hardness test and microstructural characterization. Substrates temperatures were raised to 355°C as well as 550°C while oxyacetylene flame travels at approximate of 74 mm/min along the span of the material. The experimental outcome revealed the microstructures from two examined conditions: Initial grain structures as well as grain structure when flame heated to 355°C has retained austenite crystal structure while flame heating to 500⁰-550°C revealed chromium carbide precipitates. Within the investigated temperature range of 500⁰-550°C, preheating was evidently proven to result to sensitization.

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Periodical:

Applied Mechanics and Materials (Volumes 465-466)

Pages:

1287-1291

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.465-466.1287

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Online since:

December 2013

Authors:

Adam Umar Alkali, Turnad Lenggo Gintar, Hasan Fawad, Ahmad Majdi Abdulrani

Keywords:

Microstructure, Oxyacetylene Flame, Preheat, Stainless Steel (SS)

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