| 摘要: |
| 通过对双组分M-CuSn混合粉末进行激光烧结试验,表明此组粉末体系成形机制是粉末半熔化状态下的液相烧结机制。详细讨论了激光工艺参数对成形机制及烧结质量的影响,结果表明,将激光功率和扫描速率控制在适宜的范围内,才可实现预期的成形机制,并获得较好的烧结质量。对烧结件显微组织分析表明,组分Ni和CuSn间存在较为明显的熔点差、及两者之间较高的固溶度,是保证液相烧结机制、获得较高烧结致密度的前提。 |
| 关键词: 选区激光烧结 金属粉末 液相烧结 激光工艺参数 |
| DOI： |
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| 基金项目:国家自然科学基金委员会-中国工程物理研究院联合基金(10276017);航空科学基金(04H52061);南京航空航天大学科研创新基金(S0403-061)资助项目 |
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| Selective laser sintering of Ni-CuSn powder mixture |
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SHEN Yi-fu, WU Peng, GU Dong-dong, ZHAO jian-feng, HUANG Yin-hui
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College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
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| Abstract: |
| Selective laser sintering of a two-component Ni-CuSn powder mixture has been successfully processed based on the mechanism of liquid phase sintering during which partial melting of powder occurred.The effect of laser processing parameters on the sintering mechanism and sintering quality were studied.It shows that controlling the processing parameters,especially laser powder and scan speed in a suitable range can ensure anticipant sintering mechanism and sound densification.The analysis on the microstructural features of the sintered sample demonstrates the conditions for achieving high densification level,that is,the obvious difference in the melting point of Ni and CuSn,and the high mutual solubility. |
| Key words: selective laser sintering metal powder liquid-phase sintering laser processing parameters |
