冷却速率对管线钢中非金属夹杂物成分演变的影响

张月鑫, 王举金, 杨文, 张立峰

Effect of Cooling Rate on the Evolution of Nonmetallic Inclusions in a Pipeline Steel

ZHANG Yuexin, WANG Jujin, YANG Wen, ZHANG Lifeng

表1 Al、 Mg、Ca、S、O在液态、δ和γ钢中的扩散系数[26~28]

Table 1 Diffusion coefficients of dissolved Al, Mg, Ca, S, and O in liquid, δ, and γ steel[26-28]

Element In liquid In δ In γ Al 3.5 × 10-09 5.9 × exp(-241186 / (RT )) / 10000 5.15 × exp(-245800 / (RT )) / 10000 Mg 3.5 × 10-09 0.76 × exp(-224430 / (RT )) / 10000 0.055 × exp(-249366 / (RT )) / 10000 Ca 3.5 × 10-09 0.76 × exp(-224430 / (RT )) / 10000 0.055 × exp(-249366 / (RT )) / 10000 S 4.1 × 10-09 4.56 × exp(-214639 / (RT )) / 10000 2.4 × exp(-223426 / (RT )) / 10000 O 2.7 × 10-09 0.0371 × exp(-96349 / (RT )) / 10000 5.75 × exp(-168454 / (RT )) / 10000