摘要
通过扫描电子显微镜和X-射线能谱分析研究了C-Mn钢(%:0.13～0.20C、1.00～1.60Mn、0.09Cu、0.07As、0.05Sn)连铸坯热轧的25 mm板表面微裂纹。结果表明,热轧板表面裂纹两侧存在薄的氧化脱碳层,裂纹沿晶界开裂,裂纹附近的基体处存在Cu、As、Sn低熔点富集相。实际生产中当钢中的Cu、As、Sn含量分别控制≤0.02%,可基本消除热轧板表面网状裂纹。
The surface micro cracks of 25 mm hot rolled plate rolled by cast slab of C-Mn steel （ 0. 13 -0. 20C, 1.00 - 1.60Mn, 0. 09Cu, 0. 07As, 0. 05Sn） have been studied by scanning electron microscope and X-ray energy dispersive spectrometer. Results showed that there was thin oxidizing-decarburizing layer at both sides of surface crack, the crack fractured along grain-boundary and the low-melting-point Cu-As-Sn enriched phases existed at steel matrix near crack. In production practice, as Cu, As, Sn content in steel was respectively controlled ≤0. 02%, the surface net cracks of hot rolled plate were basically eliminated.
出处
《特殊钢》
北大核心
2008年第6期41-43,共3页
Special Steel
