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以大的试样样本为基础,利用显微镜、扫描电镜和金属原位分析仪,系统地分析试样中的非金属夹杂物和贝氏体组织对中厚板伸长率的影响规律。试验结果表明:钢中非金属夹杂物和贝氏体组织是影响伸长率的主要因素。钢中非金属夹杂物在种类、含量和分布上对板材的伸长率降低有很大的影响,尤其是硫化物和硅酸盐类夹杂的影响更为严重。试验结果也表明了条带状的贝氏体组织对板材的伸长率减小的影响作用也是显著的。它们之间有着较为密切的相关性。
Based on a large sample specimen, the effects of nonmetal inclusions and bainite on the elongation of the plate were analyzed systematically by means of microscope, scanning electron microscope and metal in situ analyzer. The test results show that: non-metallic inclusions and bainite in steel is the main factor affecting the elongation. Non-metallic inclusions in steel in the type, content and distribution of the elongation of the plate has a great impact, especially the impact of sulfide and silicate inclusions more serious. The test results also show that the effect of banded bainite on the reduction of sheet elongation is significant. There is a close correlation between them.