BWRA and Séférian Model for Preheating Temperature Calculation in Case of Low Alloyed and Unalloyed Steel

Abstract:

For the assurance of the welding quality is very important to choose an adequate welding process. In case of this procedure specification we have to take account of the chemical composition, plate thickness of the work pieces and the used welding process with its parameters. In case of quenched and tempered steel even that limited alloys content we have to calculate the carbon equivalent and the preheating temperature. The preheating temperature depends on the carbon equivalent, the plate thickness and the welding process too. To obtains correct process parameters, important to choose and use the appropriate model [1]. For calculate the suitable preheating temperature we used the BWRA and the Séférian model too. We compared the results and made welding tests to monitoring the effect of the different preheating temperature. We used two different steel in our welding experiments, it was a carbon steel (S235JR) and a low alloyed hardening steel (28Mn6). After the welding test we measured the hardness changing in the heat affected zone (HAZ). On the base of our test results we concluded that in case of the used steels the suitable method is the Séférian’s.

• Periodical: Materials Science Forum (Volume 885)
• Pages: 239-244
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.885.239
• Online since: February 2017
• Authors: Tünde Anna Kovács*, Peter Pinke
• Keywords: BRWA, Heat Affected Zone, Preheating, Séférian Model

References

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DOI: 10.1016/j.matdes.2009.11.066

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[6] ISO/TR 581: 2005: Weldability-Metallic materials-general principles.