牛延龙, 孙新军, 刘清友, et al. Effect of Cr on Phase Transformation and Structure of 0.035C-0.12Nb X80 Pipeline Steel[J]. Special Steel, 2009, 30(5): 63-64.DOI:
Transformation point of continuous cooling austenite at cooling rate 0.5~50 ℃/s in cast billet of X80 pipeline steel (%:0.034~0.036C,1.79~1.80Mn,0.26~0.62Cr,0.12Nb,0.01Ti,0.0037~0.0038N) melted by 50 kg vacuum induction furnace was determined by Formaster-F Ⅱ dilatometer
and structure of steel was observed. Results showed that at same cooling rate
with increasing Cr content in steel the overcooling austenite continuous cooling trans- formation point to bainite decreased