中国激光, 2018, 45 (5): 0502010, 网络出版: 2018-05-02 复制并引用该论文  本文已被引 2 次  被引通知

图 & 表

图 1. (a)硬度试样的形状与尺寸;(b)冲击试样的形状与尺寸;(c)试样成形方向示意图

Fig. 1. (a) Shape and size of hardness samples; (b) shape and size of impact samples;(c) schematic of sample forming direction

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图 2. PA2200粉末的形貌。(a)新粉;(b)第1次回用粉;(c)第8次回用粉;(d)粘附粉

Fig. 2. Morphology of PA2200 powders. (a) Virgin powders; (b) the first recycled powders; (c) the eighth recycled powders; (d) adhered powders

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图 3. 不同粉末的DSC测试结果

Fig. 3. DSC test results of different powders

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图 4. 回用次数对试样冲击韧性的影响

Fig. 4. Effect of recycling times on impact toughness of samples

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图 5. 成形件的冲击断口形貌。(a)(b)新粉成形件;(c)(d)第1次回用粉成形件;(e)(f)第4次回用粉成形件;(g)(h)第8次回用粉成形件

Fig. 5. Impact fracture morphology of the formed samples. (a)(b) Formed sample with virgin powders; (c)(d) formed sample with the first recycled powders; (e)(f) formed sample with the fourth recycled powders; (g)(h) formed sample with the eighth recycled powders

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图 6. 回用次数对成形件硬度的影响

Fig. 6. Effect of recycling times on hardness of formed samples

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表 1实验参数

Table1. Experimental parameters

Laserpower /W Scanspacing /mm Layerthickness /mm Preheatingtemperature /℃ Scanspeed /(mm·s-1) 30 0.15 0.1 168 1500

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表 2不同粉末的熔点和结晶度

Table2. Melting point and crystalline of different powders

Powders Meltingpoint /℃ Crystallinity /% Virgin powdersThe first recycled powdersThe second recycled powdersThe third recycled powdersThe fourth recycled powdersThe fifth recycled powdersThe sixth recycled powdersThe seventh recycled powdersThe eighth recycled powdersAdhered powders 188.1191.0190.6191.6191.3191.0191.1191.0191.3192.6 52.053.053.051.651.751.451.551.351.542.7

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黎振华, 朱飞, 徐慧燕, 李自良, 滕宝仁, 张晓伟. 粉末回用对选择性激光烧结聚酰胺硬度和冲击韧性的影响[J]. 中国激光, 2018, 45(5): 0502010. Li Zhenhua, Zhu Fei, Xu Huiyan, Li Ziliang, Teng Baoren, Zhang Xiaowei. Effect of Powder Recycling on Hardness and Impact Toughness of Polyamide Formed by Selective Laser Sintering[J]. Chinese Journal of Lasers, 2018, 45(5): 0502010.