球墨铸铁轧辊的光纤激光合金化性能

发布时间：2018-01-20 12:34

本文关键词： 球墨铸铁轧辊光纤激光合金化耐磨性维氏硬度疲劳性能亚共晶组织共晶组织　出处：《沈阳工业大学学报》2015年01期 　论文类型：期刊论文

【摘要】：为了提高球墨铸铁轧辊的使用性能,采用光纤激光合金化系统对轧辊表面的预置合金层进行激光扫描,在球墨铸铁轧辊表面形成了冶金结合的合金化层.在最佳工艺参数条件下,分析了合金化层的耐磨性能、维氏硬度、冷热疲劳性能和显微组织.结果表明,合金化后的球墨铸铁轧辊的耐磨性能约为基体的3倍,维氏硬度也得到了明显提高,冷热疲劳性能基本相同.合金化层由亚共晶组织构成,亚共晶组织初晶相由马氏体(M)、未分解WC硬质相及共晶组织构成,共晶组织由马氏体(M)与复杂碳化物(WC、Co6W6C和Fe3C)构成.合金化层深度约为0.4 mm且组织细小.
[Abstract]:In order to improve the performance of ductile iron roll, the laser scanning of the preset alloy layer on the surface of the roll was carried out by using the optical fiber laser alloying system. A metallurgical alloying layer was formed on the surface of ductile iron roll. The wear resistance, Vickers hardness, cold and hot fatigue properties and microstructure of the alloyed layer were analyzed under the optimum technological parameters. The wear resistance of the alloyed ductile iron roll is about 3 times of that of the matrix, and the Vickers hardness is obviously improved, and the cold and thermal fatigue properties are basically the same. The alloying layer is composed of hypoeutectic structure. The primary phase of hypoeutectic microstructure is composed of martensite, undecomposed WC hard phase and eutectic structure, and eutectic structure is composed of martensite M) and complex carbides. Co6W6C and Fe _ 3C). The depth of alloying layer is about 0.4 mm and the microstructure is fine.
【作者单位】：沈阳工业大学材料科学与工程学院;鞍山煜宸科技有限公司研发部;最新激光技术研究中心研发部;
【基金】：2013—2014年国家外国专家局“高端外国专家项目”(GDW20122101064)
【分类号】：TG333.17
【正文快照】： 心研发部,爱知县安城4460026)在冶金行业中,轧辊已经成为各大钢铁企业的极大消耗品之一,其使用性能和寿命直接影响钢铁企业的产品质量、生产成本和效率[1-2].当球墨铸铁轧辊工作时,被轧制件的温度约为1 150~1 250℃,而球墨铸铁轧辊表面的瞬时温度可达600~700℃.在轧制过程中,

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