| 激光熔丝增材制造温度场的红外热像监测 |
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| 引用本文： | 朱进前,凌泽民,杜发瑞,丁雪萍,李慧敏.激光熔丝增材制造温度场的红外热像监测[J].红外与激光工程,2018,47(6):604002-0604002(5). |
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| 作者姓名： | 朱进前 凌泽民 杜发瑞 丁雪萍 李慧敏 |
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| 作者单位： | 1.重庆大学 材料科学与工程学院,重庆 400045; |
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| 基金项目： | 中国科学院重点部署项目（ZDRW-KT-2016-1;KGZD-EW-T04）;重庆市基础科学与前沿技术研究一般项目（cstc2016jcyjA0059）;先进焊接与连接国家重点实验室面上项目（AWJ-M16-03） |
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| 摘 要： | 为实现对增材制造成形件的精确控形控性，必须要对其热过程有一定科学认识。以真空环境下激光熔丝增材制造单道成形为例，利用红外热像技术对其热过程进行监测。比较分析送丝速度对温度场、热循环、冷却速率的影响规律，利用红外热分析对其成形熔敷道宽度及缺陷开展研究。结果表明:借助红外热像可实现对熔敷道温度场变化的监测，沿熔敷道长度成形方向，监测点对应最高温度和冷却速率分别呈现升高和降低趋势。随着送丝速度的增加，熔敷道长度1/4、2/4、3/4处监测点对应的冷却速率随之减小。此外，基于红外热分析可实现对熔敷道宽度预测以及对缺陷位置的定位。
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| 关 键 词： | 红外热像 增材制造 激光熔丝 送丝速度 |
| 收稿时间： | 2018-01-12 |
Monitoring of laser metal-wire additive manufacturing temperature field using infrared thermography |
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| Affiliation: | 1.School of Material Science and Engineering,Chongqing University,Chongqing 400045,China;2.Chongqing Institute of Green and Intelligent Technology,Chinese Academy of Sciences,Chongqing 400714,China;3.Chongqing Key Laboratory of Additive Manufacturing Technology and Systems,Chongqing 400714,China |
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| Abstract: | For achieving precisely controlling shape and performance of components by additive manufacturing, scientific understanding is needed for thermal process. Taking laser metal-wire additive manufacturing (AM) under vacuum and using single-pass as an example, the thermal process was monitored based on infrared (IR) thermography. The effect of wire feeding speed on temperature field, thermal cycle, cooling rate was analyzed. The width of cladding layer and defect were studied based on IR thermography. The results show that the temperature monitoring was achieved. Along the length of cladding layer, the maximum temperature for monitoring point increased and then the cooling rate decreased. With wire feeding speed increasing, it led to the decrease of cooling rate for monitoring point at 1/4, 2/4, 3/4 of cladding layer. In addition, the width of cladding layer could be predicted and the location of defect could be located with the help of IR thermography analysis. |
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