连铸板坯内裂纹的检验分析

钢铁研究学报, 2004, 16(2): 43-46.

1.北京科技大学冶金学院,北京,100083

2.北京科技大学冶金学院,北京,100083

3.北京科技大学冶金学院,北京,100083

4.北京科技大学冶金学院,北京,100083

Analysis on Internal Crack in Continuous Casting Slab

对连铸板坯内裂纹试样进行了金相及扫描电镜分析,发现裂纹主要发生在粗大的等轴晶区,并伴有大量的疏松和缩孔;沿拉坯方向裂纹是连续的;距板坯窄面的距离由50 mm变为110 mm时,铸坯的凝固时间不一致,裂纹表面的硫、磷含量逐渐增大,裂纹断口形貌由塑性断口变为凝固收缩断口.

[1]	Won Young Mok;Yeo Tae-Jung;Seol Dong Jin .New Crite-rion for Internal Crack Formation in Continuously Cast Steels[J].Metallurgical and Materials Transactions,2000,31(08):779-794.
[2]	A. Yamanaka;K. Nakajirna;K. Okamura .Critical strain for internal crack formation in continuous casting[J].Ironmaking & Steelmaking: Products and applications,1995(6):508-512.
[3]	Hiebler H;Zirngast J;Wolf M M.Inner Crack Formation inContinuous Casting:Stress or Strain Criterion[A].Chicago,1994:405-416.

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