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Influence of heat treatments on the impact toughness of a Ti-stabilized 12%Cr supermartensitic stainless steel

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Influence of heat treatments on the impact toughness of a Ti-stabilized 12%Cr supermartensitic stainless steel

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Título Influence of heat treatments on the impact toughness of a Ti-stabilized 12%Cr supermartensitic stainless steel
Autor Tavares, Sérgio Souto Maior
Abreu, Hamilton Ferreira Gomes de
Strohaecker, Telmo Roberto
Silva, Mariana Bertonceli
Macêdo, Marcelo Camargo Severo de
Resumo The supermartensitic stainless steels (SMSS) are a relatively new class of corrosion resistant alloys developed to obtain a better combination of weldability, strength, toughness and corrosion resistance than conventional martensitic stainless steels. The final properties of SMSS are strongly influenced by quenching and tempering heat treatments. In this work, different routes of heat treatments were tested in a Ti-stabilized 12%Cr supermartensitic stainless steel with the objective to improve mechanical properties, specially the low temperature (-46oC) toughness. Double and triple quenching were tested and compared to single quenching heat treatments. Two tempering temperatures (500oC and 650oC) were tested. The results obtained with instrumented Charpy impact tests showed that a triple quenching treatment was able to increase the density of fine TiC particles and improve the mechanical properties of specimens heat treated by quenching and tempering at 650oC.
Contido em Materials research : ibero-american journal of materials. São Carlos, SP. vol. 20, no. 2 (Mar./Apr. 2017), p. 469-473
Assunto Aço inoxidável
Tratamento térmico
[en] Embrittlement
[en] Heat treatment
[en] Instrumented Charpy
[en] Supermartensitic stainless steels
Origem Nacional
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/164928
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