Inconel 625激光直接金属沉积成形参数无量纲化及其对单道几何形貌的影响
发布时间:2018-12-19 08:12
【摘要】:为了对激光直接金属沉积成形技术中不同参数进行规范,对Inconel 625球形合金粉末进行了激光直接金属沉积成形试验,对成形参数进行了无量纲化,得到了以接触角为几何形貌评价参数的加工图,并对工艺参数与单道沉积层几何形貌间的关系进行了分析讨论。结果表明,特征能量比为0.5~0.7时,粉末完全熔化且不造成能量剩余,沉积层呈现平滑的椭圆形;送粉速率是控制沉积层高度的首要因素,当送粉速率恒定时,激光功率对熔池深度影响较大。
[Abstract]:In order to standardize the different parameters of laser direct metal deposition (DME), the laser direct metal deposition (DME) forming test of Inconel 625 spherical alloy powder was carried out, and the forming parameters were dimensionless. The machining diagram with contact angle as the geometric shape evaluation parameter was obtained, and the relationship between the process parameters and the geometric morphology of the single channel deposit layer was analyzed and discussed. The results show that when the characteristic energy ratio is 0. 5 ~ 0. 7, the powder melts completely and does not cause energy surplus, and the deposit layer presents a smooth ellipse. The powder feeding rate is the primary factor to control the deposition height. When the powder feeding rate is constant, the laser power has a great influence on the depth of the molten pool.
【作者单位】: 东北大学材料各向异性与织构教育部重点实验室;
【基金】:教育部高等学校基本科研业务费项目(N130810001) NSFC-辽宁联合基金重点项目(U1508213) 广东省前沿与关键技术创新专项资金(2015B010122001)
【分类号】:TG665
本文编号:2386652
[Abstract]:In order to standardize the different parameters of laser direct metal deposition (DME), the laser direct metal deposition (DME) forming test of Inconel 625 spherical alloy powder was carried out, and the forming parameters were dimensionless. The machining diagram with contact angle as the geometric shape evaluation parameter was obtained, and the relationship between the process parameters and the geometric morphology of the single channel deposit layer was analyzed and discussed. The results show that when the characteristic energy ratio is 0. 5 ~ 0. 7, the powder melts completely and does not cause energy surplus, and the deposit layer presents a smooth ellipse. The powder feeding rate is the primary factor to control the deposition height. When the powder feeding rate is constant, the laser power has a great influence on the depth of the molten pool.
【作者单位】: 东北大学材料各向异性与织构教育部重点实验室;
【基金】:教育部高等学校基本科研业务费项目(N130810001) NSFC-辽宁联合基金重点项目(U1508213) 广东省前沿与关键技术创新专项资金(2015B010122001)
【分类号】:TG665
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