采用光学显微镜、扫描电镜以及能谱分析等方法对低合金中厚板边部裂纹形成机制进行研究。结果表明：中厚板边部裂纹的形成是由于在轧制过程中钢板边部表层出现低温组织；变形不均匀导致边部应力集中，以钢板次表层存在的皮下气泡或颗粒状CaO—-iO2-Al2O3夹杂物为裂纹源，萌生裂纹并扩展，形成中厚板边部多处断续出现的横向应力裂纹。
Systematic investigation on the formation mechanism of edge crack for low alloy medium and heavy plate was made by using optical microscope, scanning electron microscope and electron probe microanatysis techniques. The result shows that the edge crack of plate formed because of the over-cooling structure formed on the surface of plate in rolling processes and the inhomogeneous deformation lied to stress concentration at the edge of plate. The skin blowhole and CaO-SiO2-A12 03 inclusion in the subsurface layer of plate are crack sources~ crack initiation and growth, present intermittent occurred for multiple sites transverse stress edge cracks on medium and heavy plate.
参考文献
| [1] | 孙彦辉,赵长亮,蔡开科,成小军,周春泉,吴光亮.CSP板卷边部裂纹影响因素分析[J].钢铁研究学报,2007(04):39-43. |
| [2] | N. Pradhan;N. Banerjee;B.B. Reddy .Control of transverse cracking in special quality slabs[J].Ironmaking & Steelmaking: Products and applications,2001(4):305-311. |
| [3] | 周德光,傅杰,柳得橹,康永林,王忠丙,王元立.CSP薄板表面裂纹的形成机理与预防措施[J].北京科技大学学报,2002(04):403-406. |
| [4] | 魏立国,朱岩,徐国栋,石云峰,彭勇.宝钢厚板边裂成因分析和改善[J].宝钢技术,2006(06):47-50. |
| [5] | 张华,倪红卫.中厚板边裂的形成与控制[J].武汉科技大学学报（自然科学版）,2006(03):217-220. |
| [6] | Olunura Naoki;Sekiguchi Shoichi .Metallurgical Factors Con cerned With Cleavage Fracture of Heavy Plates Produced FromContinuously Cast Slabs[J].ISIJ International,1983,23(08):301. |
| [7] | Mastsumiya T .Recent Topic of Research and Development in Continuous Casting[J].ISIJ International,2006,46(12):1800. |
| [8] | Atkinson H V;Shi G .Characterization of Inclusions in Clean Steels:A Review Including the Statistics of Extremes Meth ods[J].Progress in Materials Science,2003,48:457. |
| [9] | Yu H L;liu X H;Li X W .Analysis of Inclusion Deformation and Crack Generation During Cold Rolling With a TransitionLayer[J].Materials Letters,2008,62(10):1595. |
| [10] | Savalia PC;Tippur HV .A study of crack-inclusion interactions and matrix-inclusion debonding using Moire interferometry and finite element method[J].Experimental Mechanics,2007(4):533-547. |
| [11] | Hosseini S B;Temmel C;Karlsson B Ingesten .An in-Situ Scaning Electron Microscopy Study of the Bonding Between MnS Inclusions and the Matrix During Tensile Deformation of Hot Rolled Steels[J].Metallurgical and Materials Transac- tions A,2007,38(05):982. |
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