Effect of continuous annealing process on various structure parameters of martensite of dual-phase steels

• Autorzy: Gorain Nemai , Walunj Mahesh Gulab , Soni Manish Kumar , Kumar B. Ravi

Identyfikatory

DOI

10.1007/s43452-020-00022-4

• Języki publikacji: EN

Abstrakty

EN

Industrial continuous annealing process routes for dual-phase steels are mostly found to be non-isothermal in nature. The present study is an effort to understand the importance of non-isothermal annealing process parameters and their impact on the various metallurgical phenomena; such as recrystallisation and phase transformation behaviours of duel-phase steel. These, in turn, are expected to influence various structure parameters of martensite phase which are critical in determining the strength of duel-phase steel. A dual-phase steel sheet in 67% cold rolled full hard condition was subjected to non-isothermal annealing treatment with varying heating rate and inter-critical annealing temperatures. After processing the samples were investigated for structural parameters of martensite phase using a scanning electron microscope, X-ray diffraction, and nano-indentation technique. It was observed that due to non-isothermal nature of continuous annealing process, the hardness of the martensite phase did not follow the hardness trends as determined from conventional carbon concentration. Further, lattice tetragonality of martensite was also affected by increasing its volume fractions. The annealing process apparently influenced the evolution of texture because of the increasing fraction of martensite in dual-phase steel.

Słowa kluczowe

EN

dual-phase steel; tensile properties; continuous annealing; martensite; lattice parameter

PL

stal dwufazowa; rozciąganie; wyżarzanie ciągłe; martenzyt

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2020
• Tom: Vol. 20, no. 1
• Strony: 405--414
• Opis fizyczny: Bibliogr. 28 poz., rys., tab., wykr.

Twórcy

autor

Gorain Nemai

• Academy of Scientific and Innovative Research, India & Tata Steel Ltd, Jamshedpur 831001, India

autor

Walunj Mahesh Gulab

• CSIR-National Metallurgical Laboratory, Jamshedpur 831007, India

autor

Soni Manish Kumar

• CSIR-National Metallurgical Laboratory, Jamshedpur 831007, India

autor

Kumar B. Ravi

• CSIR-National Metallurgical Laboratory, Jamshedpur 831007, India

Bibliografia

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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021)