Paper Title:

Effects of Nb and V on the Microstructure and Properties of Rolled Non-Quenched and Tempered Steels

Periodical Advanced Materials Research (Volume 509)
Main Theme Latest Development of Applied Materials Technology
Edited by S.T. Tu, G.Z. Wang and J.M. Gong
Pages 75-81
DOI 10.4028/www.scientific.net/AMR.509.75
Citation Ming Tu Ma et al., 2012, Advanced Materials Research, 509, 75
Online since April, 2012
Authors Ming Tu Ma, Hong Ya Yang, Hua Sheng Mei, Hong Zhou Lu
Keywords Digital Impact, Mechanical Property, Micro-Alloyed Steel, Nb-V Comprehensive Alloying
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Abstract

The property and microstructure of rolled non-quenched and tempered steels of Nb-V comprehensive micro alloying have been investigated .The mechanical properties and the load –displacement curves were measured respectively by using electron tension test machine and digital-impact test machine . The microstructure and fracture surface of impact samples were observed with SEM .The results show that micro-alloying Nb and V non-quenched and tempered steel behaves higher tension strength and toughness than that of only V micro-alloying one under the condition of about same plasticity. Improvement of the properties is related with that Nb can effectively make fine pearlite group and inter-lamella spacing at the impact fracture pearlite flakes. Corresponding relationship between various domain of fracture morphology and characteristics points at the curve of digital impact has been discussed.