邓颖,王新鑫,贺虹云,徐浩淳,熊锋

• 1:重庆理工大学材料科学与工程学院
• 2:重庆市特种焊接材料与技术高校工程研究中心
• 3:重庆理工大学车辆工程学院

摘要(Abstract)：

采用双钨极惰性气体保护焊(TIG)电弧双丝增材制造方法,制备了低碳钢/不锈钢薄壁梯度材料,并分析其微观组织、力学性能和耐腐蚀性能。结果表明:随着不锈钢所占比例的增加,低碳钢/不锈钢梯度材料的元素成分呈现近似线性的变化规律,Fe元素含量逐渐减小,而Cr和Ni元素含量逐渐增加;梯度材料的微观组织在高度方向呈现梯度变化,由底部的马氏体、铁素体组织过渡到中部的马氏体组织再到中上部位的马氏体和奥氏体,最终过渡到顶部的δ铁素体和奥氏体组织;随着不锈钢比例的增加,梯度材料的显微硬度大体呈逐渐增加趋势,显微硬度为230～430 HV0.3;梯度材料在水平方向和竖直方向的抗拉强度分别为1224和1106 MPa,伸长率分别为11%和12.5%;梯度材料在水平方向和竖直方向的断口形貌均由韧窝构成,表现为延性断裂的特征;随着不锈钢比例的增加,梯度材料的耐腐蚀性增强,顶部的耐腐蚀性能高于底部。

关键词(KeyWords)： 梯度材料;电弧增材;微观组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51705054);; 重庆市科技局面上项目(CSTB2024NSCQ-MSX0127);; 重庆理工大学科研创新团队培养计划(2023TDZ013)

作者(Author): 邓颖,王新鑫,贺虹云,徐浩淳,熊锋

DOI: 10.13289/j.issn.1009-6264.2024-0482

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