摘要
利用等离子束对球墨铸铁进行表面熔凝处理,并对熔凝处理样400℃回火1 h.通过扫描电镜、X射线衍射仪、硬度计等设备对强化层的组织、性能进行分析.结果表明:等离子柬表面熔凝处理后,球墨铸铁的表面石墨相完全消失,形成的熔凝层显微组织主要是枝晶结构;熔凝层的硬度最高值出现在次表层,熔凝层的最高硬度1 243 HV_(0.1);耐腐蚀性从高到低依次为熔凝+回火试样、熔凝样和基体样.
The surface of ductile iron was treated by using surface melting using plasma beams. Then, the surface melted specimen was tempered at 400 ℃ for 1 h. Scanning electron microscopy （SEM） and X-ray diffraction （XRD） were employed to identify the microstrueture and phase structure. The corrosion resistance and microhardness were tested. The results show that the near-surface graphite of the nodule disappears completely and there are mainly dendrites and eutectics in the melted zone The highest microhardncss present in the subsurface is 1 243 HVob The corrosion resistance declines in the following descending order： surface meted ＋ tempered specimen 〉 the surface melted 〉 the substrate.
出处
《五邑大学学报（自然科学版）》
CAS
2013年第3期41-45,共5页
Journal of Wuyi University(Natural Science Edition)
关键词
球墨铸铁
等离子束
显微组织
耐蚀性
nodular cast iron
plasma beams
microstructures
corrosion resistance
作者简介
程秀（1976-），女，湖北广水人，讲师，硕士，主要从事等离子柬表面强化的研究．
