| 40MnBH轧制钢棒裂纹分析 |
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| 引用本文： | 张文青,云彦青,崔海霞.40MnBH轧制钢棒裂纹分析[J].理化检验(物理分册),2011(11):710-712. |
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| 作者姓名： | 张文青 云彦青 崔海霞 |
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| 作者单位： | 西宁特殊钢集团有限责任公司,西宁810005 |
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| 摘 要： | 通过夹杂物检验、蓝脆断口检验以及电子探针能谱分析对40MnBH钢表面出现轴向裂纹的成因进行了分析。结果表明:裂纹是由连铸坯卷渣造成的。由于连铸拉速过高,导致钢水在结晶器内形成紊流,使得吸附了大量Al2O3和SiO2等脱氧产物的保护渣被卷入钢水中,形成了连铸坯卷渣。
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| 关 键 词： | 40MnBH钢 圆棒 裂纹 连铸保护渣 |
Analysis on Cracks in Rolled Bar of 40MnBH Steel |
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| ZHANG Wen-qing,YUN Yan-qing,CUI Hai-xia.Analysis on Cracks in Rolled Bar of 40MnBH Steel[J].Physical Testing and Chemical Analysis Part A:Physical Testing,2011(11):710-712. |
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| Authors: | ZHANG Wen-qing YUN Yan-qing CUI Hai-xia |
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| Affiliation: | (Xining Special Steel Group Co. , Ltd. , Xining 810005, China) |
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| Abstract: | Axial cracking were found on the surface of some 40MnBH steel bars. Inclusion testing, blue brittleness testing and EPMA analysis were applied to analyse the cause of the cracks. The results showed that the cracks were caused by the protective slag entrapment of continuous casting. The high continuous casting speed led to the turbulent flow of the hot melt in the mould, resulting in the entrapment of the protective slag that has absorbed lots of deoxidation products, such as Al2O3 and SiO2. |
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| Keywords: | 40MnBH steel bar crack protective slag of continuous casting |
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