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钛合金激光沉积制造热累积与熔池形貌演化
引用本文:钦兰云,徐丽丽,杨光,刘奇,王维.钛合金激光沉积制造热累积与熔池形貌演化[J].稀有金属材料与工程,2017,46(9):2645-2650.
作者姓名:钦兰云  徐丽丽  杨光  刘奇  王维
作者单位:1沈阳航空航天大学 航空制造工艺数字化国防重点学科实验室,1沈阳航空航天大学 航空制造工艺数字化国防重点学科实验室,1沈阳航空航天大学 航空制造工艺数字化国防重点学科实验室,1沈阳航空航天大学 航空制造工艺数字化国防重点学科实验室,1沈阳航空航天大学 航空制造工艺数字化国防重点学科实验室
基金项目:国家自然科学(51505301,51375316);辽宁省自然科学(2015020118);国家重点研发计划项目(2016YFB1100504)
摘    要:为了研究激光沉积制造过程热累积对熔池形貌的影响,利用有限元软件对单道多层激光沉积制造TA15钛合金过程三维温度场进行数值模拟,得到不同沉积层上的节点热循环特性、熔池温度分布规律以及熔池形貌变化,结果表明沉积过程存在着热累积现象会使熔池面积逐渐变大。并通过对激光沉积过程熔池进行实时监测的试验对模拟进行了验证,结果显示热累积直接影响沉积层上熔池的宽度以及倾斜角度,且自一定层数之后,熔池温度和熔池宽度逐渐趋于稳定。实验结果和模拟结果吻合较好。

关 键 词:激光沉积制造  熔池  热累积  数值模拟  熔池倾角
收稿时间:2016/12/14 0:00:00
修稿时间:2017/2/6 0:00:00

Correlations of thermal accumulation and melt pool geometry during Laser Deposition Titanium Alloy Manufacturing
Qin Lanyun,Xu Lili,Yang Guang,Liu Qi and Wang Wei.Correlations of thermal accumulation and melt pool geometry during Laser Deposition Titanium Alloy Manufacturing[J].Rare Metal Materials and Engineering,2017,46(9):2645-2650.
Authors:Qin Lanyun  Xu Lili  Yang Guang  Liu Qi and Wang Wei
Affiliation:1.Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University,1.Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University,1.Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University,1.Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University,1.Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University
Abstract:In order to study the effect of thermal accumulation of Laser deposition manufacturing (LDM) process on melt pool geometry. A three-dimensional(3D) multi-layer model for LDMed TA15 titanium alloy was developed to discover thermal cycle characteristics, temperature distribution of melt pool and melt pool geometry. Results showed that melt pools width increase gradually with the increase of deposition layer because of thermal accumulation. The numerical results were validated by experimental-measured values collected by in-situ monitoring techniques. Thermal accumulation is strongly correlated to melt pool width and melt pool inclination, however, melt pool temperature and width gradually become relatively stableSafter a certain number of layers. The experimental data and model prediction show a good agreement.
Keywords:Laser deposition manufacturing  melt pool  thermal accumulation  numerical simulation  melt pool inclination
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