Relationship of Post Treatment Temperature and Tensile Strength for Selective Laser Sintering
Relationship of Post Treatment Temperature and Tensile Strength for Selective Laser Sintering
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DOI：
10.4028/www.scientific.net/amm.155-156.872
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发表时间：
2012-02
期刊：
影响因子：
--
通讯作者：
Jun Su;Xiao Jing Li;P. Qu
中科院分区：
文献类型：
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作者：
Jun Su;Xiao Jing Li;P. Qu
尽管SLS技术得到了很好的发展，但烧结原型件的强度仍需大量的研究。原型件强度偏低，严重影响产品质量。以往的研究结果表明，SLS烧结法制备的覆膜砂试样强度较低，不能用于金属铸造，烧结后的零件必须进行后处理。本研究以覆膜砂铸件为材料进行选择性激光烧结实验，研究了处理温度和时间对后处理力学性能的影响，以及对制件发气性和结晶性的影响。并结合铸造实验分析了覆膜砂烧结件精度的影响因素及其他性能评定。通过以上分析，得出了三种不同保温温度条件下，温度后处理对覆膜砂试样抗拉强度的影响规律。
Though SLS technology have got well development, the strength of the sintering prototype parts still need a lot of research. The lower strength of prototype parts mightl seriously affect the quality. The past research result shows that intensity of coated sand specimens of SLS sintering method is lower and cannot be used for metal casting, the sintered parts must be post-processed. In this study, author used the coated sand casting as the material of selective laser sintering experiment, studied the processing temperature and time on the mechanical properties of post-processing, and the influence on gas-forming property and collapsibility of the pieces. And combined with casting experimental to analyze the accuracy influence factors of precoated sand sintering parts and other performance assessment. Through the above analysis, we concluded that the influence law the post-processing of temperature on tensile strength of coated sand specimens under three different insulation temperature conditions.