摘要
对基于脉冲微束等离子弧焊接(PMPAW)的直接金属快速成形中成形轨迹间的搭接进行了研究。建立了成形轨迹间的搭接模型,分析了成形轨迹断面宽度与高度之比(宽高比)、轨迹间的中心距、搭接率等参数之间的相互关系及其对成形件性能的影响。用HOOCr21Ni10不锈钢进行了不同搭接参数的成形试验,并对成形件进行了表面平整度、抗拉强度和断后伸长率的测试。试验结果显示,采用宽高比大的成形轨迹制作的零件其三项测试结果均高于用宽高比小的成形轨迹所制作的零件。成形件纵向抗拉强度和断后伸长率优于横向,采取了层间多方向交替扫描的成形方式来获得整体上各向同性的零件。
The overlapping process of direct metal rapid prototyping using pulsed micro-plasma arc welding （PMPAW） is studied. An overlapping model between deposited tracks is established. The relationships between and among the overlapping parameters such as the ratio of width to height of the deposited tracks cross-section （2）, the distance between deposited tracks centers and the overlapping ratio are analyzed and the effect of these parameters on the part building quality is studied. Some H00Cr21Ni10 stainless steel parts are built using different overlapping parameters and the surface smoothness, tensile strength and elongation are tested. The experimental results show that the mechanical behavior of the part built with larger 2 value is better than that with smaller 2 value. The longitudinal tensile strength and elongation of the parts are better than transverse tensile strength and elongation. So a multi-directional scanning mode, i.e. alternatively scanning between two adjacent deposited layers, is adopted to build the whole isotropic parts.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2006年第5期192-197,共6页
Journal of Mechanical Engineering
基金
全国优秀博士学位论文作者专项基金资助项目(200026)。
关键词
快速成形
微束等离子弧焊
搭接参数
Rapid prototyping
Pulsed micro-plasma arc welding
Overlapping parameters
