MICROSTRUCTURE AND TEXTURE WELDS OF 15-7Mo STEEL AFTER HEAT TREATMENT

Authors

  • Aneta Ziewiec AGH University of Science and Technology
  • Anna Zielińska-Lipiec
  • Małgorzata Witkowska

DOI:

https://doi.org/10.7494/mafe.2016.42.4.225

Keywords:

semi-austenitic PH steels, XRD, welds, heat treatment, 15-7Mo steel

Abstract

This paper presents the results of determining the effect of heat treatment after welding X8CrNiMoAl15-7-2 steel (commercial name: PH 15-7Mo steel) on the microstructure and texture of the welds. XRD studies showed the presence of the two phases in the welds of 15-7Mo steel; i.e., δ ferrite and austenite. Annealing at a temperature of 400°C/1 h and 550°C/1 h results in changes of the intensities for individual peaks derived from austenite and ferrite. Microstructure investigations carried out by LM and TEM indicated that the austenite and δ ferrite coexist in themicrostructure of 15-7Mo steel in as-welded condition. Annealing at a temperature range of between 400–620°C after welding causes small changes in the microstructure. The hardness of the welds after annealing in that temperature range increases.

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References

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Published

2019-10-09

How to Cite

Ziewiec, A., Zielińska-Lipiec, A., & Witkowska, M. (2019). MICROSTRUCTURE AND TEXTURE WELDS OF 15-7Mo STEEL AFTER HEAT TREATMENT. Metallurgy and Foundry Engineering, 42(4), 225. https://doi.org/10.7494/mafe.2016.42.4.225

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