Banks K M, Tuling A, Mintz B. Hot Ductility in V-microalloyed Steels[J]. IRON STEEL VANADIUM TITANIUM, 2015, 36(5): 63-68. doi: 10.7513/j.issn.1004-7638.2015.05.013
Citation:
Banks K M, Tuling A, Mintz B. Hot Ductility in V-microalloyed Steels[J]. IRON STEEL VANADIUM TITANIUM, 2015, 36(5): 63-68. doi: 10.7513/j.issn.1004-7638.2015.05.013
Banks K M, Tuling A, Mintz B. Hot Ductility in V-microalloyed Steels[J]. IRON STEEL VANADIUM TITANIUM, 2015, 36(5): 63-68. doi: 10.7513/j.issn.1004-7638.2015.05.013
Citation:
Banks K M, Tuling A, Mintz B. Hot Ductility in V-microalloyed Steels[J]. IRON STEEL VANADIUM TITANIUM, 2015, 36(5): 63-68. doi: 10.7513/j.issn.1004-7638.2015.05.013
Transverse cracking resistance is generally displayed in low-C low-N microalloyed steels,but not in microalloyed steels with higher C levels. This paper discusses hot ductility work and commercial experience concerning V microalloyed steels with C levels between 0.05%~0.6 %. These V additions reduce transverse cracking susceptibility in steels with varying carbon content provided the [V][N] product does not exceed about 1 × 10-3. The combination of Nb and V enhances hot ductility in the critical unbending temperature range of 800~900 ℃. This improvement is due to a combination of V and Nb slowing down the dynamic precipitation process. In Ti-bearing steels,initial,high-temperature Ti N formation has the additional benefit of encouraging Ti Nb (C,N) precipitate coarsening and reducing the volume fraction of fine Nb V precipitation which are detrimental to ductility. Recent results on the hot ductility of TWIP steels as well as industrial experience in continuous casting of V-microalloyed steels is presented.
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