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Carbide dissolution and precipitation in cold-rolled type 347H austenitic heat-resistant steel

Journal Article


Abstract


  • Cold-rolled (CR) type 347H austenitic heat-resistant steel is investigated in this study, and the main strengthening phase, NbC, experiences the procedures of dissolution and precipitation twice, with the increase of deformation degree from 30% to 90%. Most of the primary NbC particles, remained during the solution treatment, dissolve in the austenitic matrix when the deformation degree is 30%, and rod-like NbC generates along the prior austenite grain boundary. Further deformation leads to the fragmentation and decomposition of the rod-like NbC. Until the cold rolling reduction reaches 90%, the dissolved NbC secondarily precipitates into nanoparticles and disperses throughout the martensite induced by deformation. The tensile strength of the 90% cold-deformed specimen, 1418┬áMPa, is enhanced by three times in contrast with the undeformed one.

Publication Date


  • 2017

Citation


  • Li, Y., Liu, Y., Liu, C., Li, C., Huang, Y., Li, H., & Li, W. (2017). Carbide dissolution and precipitation in cold-rolled type 347H austenitic heat-resistant steel. Materials Letters, 189, 70-73. doi:10.1016/j.matlet.2016.11.081

Scopus Eid


  • 2-s2.0-84999015143

Web Of Science Accession Number


Start Page


  • 70

End Page


  • 73

Volume


  • 189

Abstract


  • Cold-rolled (CR) type 347H austenitic heat-resistant steel is investigated in this study, and the main strengthening phase, NbC, experiences the procedures of dissolution and precipitation twice, with the increase of deformation degree from 30% to 90%. Most of the primary NbC particles, remained during the solution treatment, dissolve in the austenitic matrix when the deformation degree is 30%, and rod-like NbC generates along the prior austenite grain boundary. Further deformation leads to the fragmentation and decomposition of the rod-like NbC. Until the cold rolling reduction reaches 90%, the dissolved NbC secondarily precipitates into nanoparticles and disperses throughout the martensite induced by deformation. The tensile strength of the 90% cold-deformed specimen, 1418┬áMPa, is enhanced by three times in contrast with the undeformed one.

Publication Date


  • 2017

Citation


  • Li, Y., Liu, Y., Liu, C., Li, C., Huang, Y., Li, H., & Li, W. (2017). Carbide dissolution and precipitation in cold-rolled type 347H austenitic heat-resistant steel. Materials Letters, 189, 70-73. doi:10.1016/j.matlet.2016.11.081

Scopus Eid


  • 2-s2.0-84999015143

Web Of Science Accession Number


Start Page


  • 70

End Page


  • 73

Volume


  • 189