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连铸板坯在结晶凝固之前承受下述应力:1.坯壳由于静压力而鼓肚;2.铸坯由于拉坯力而受拉应力;3.铸坯产生的弯曲:(1)由垂直段至弧形段(直结晶器);(2)由弧形段至水平导辊;(3)由于不希望产生的辊子位移。同时在坯壳中产生应力并由此产生延伸和延伸变化。除与铸坯材质有关的某一确定的延伸值外,铸坯在二相区(固-液)产生断裂,并形成裂纹偏析,裂纹产生的形象图参见文献。由此提出了设备结构方面的课题,即所谓铸坯的夹持,弯曲和拉坯,必须使其不产生内裂。为解决这个问题,首先必须阐明钢在高温负荷条件下的性状。
Continuous casting slab before solidification in the crystal to withstand the following stresses: 1. The shell due to static pressure and bulge; 2. Casting slab tensile stress due to tension; 3. Cast slab bending: (1) by the vertical Segment to arc segment (straight crystallizer); (2) from arc segment to horizontal guide roller; (3) displacement of rollers due to unwanted production. At the same time, stresses are generated in the blank shell and the resulting extension and extension changes. In addition to a certain extension value related to the slab material, the slab ruptures in the two-phase zone (solid-liquid) and forms crack segregation. For the image of the crack, see the literature. As a result, a project on the structure of the equipment was proposed, that is, the so-called slab clamping, bending and drawing must be made so as not to cause internal cracks. To solve this problem, we must first clarify the steel under high temperature load conditions.