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1.引言所谓连铸坯内部裂纹(简称内裂),就是在连铸坯内部而不露出铸坯表面的裂纹1(见图1)。一般对连铸坯内裂只在某一断面(多以横断面)进行研究,而对连铸坯内裂的空间形貌研究甚少,至于铸坯内裂在热轧无缝钢管过程中变化情况的研究,更不多见。因此,有必要对连铸坯内部裂纹形貌及其在热轧无缝钢管过程中的形踪进行研究,从而进一步认识连铸坯的内部裂纹,这对裂纹的研究具有一定的意义。
1. Introduction The so-called slab internal cracks (referred to as internal cracking), is in the continuous casting slab without exposing the surface of the slab cracks 1 (see Figure 1). In general, the internal fissure of the continuous casting slab is only studied in a cross-section (mostly in cross-section), while there is little research on the spatial shape of the internal fissure in the continuous casting slab. As for the internal fissure in the continuous casting slab, Situation research, more rare. Therefore, it is necessary to study the internal crack shape of the continuous casting slab and its tracing in the process of hot-rolled seamless steel pipe to further understand the internal crack of the continuous casting slab, which is of certain significance for the study of cracks.