316L選擇性激光燒結參數對燒結件性能的影響

任乃飛,杭雅慧,趙　巖

(江蘇大學 機械工程學院,江蘇 鎮江　212013)

316L選擇性激光燒結參數對燒結件性能的影響

任乃飛,杭雅慧,趙巖

(江蘇大學 機械工程學院,江蘇 鎮江212013)

摘要在金屬零件制造過程中采用選擇性激光燒結方法,金屬零件的性能會受多種因素的影響,而影響因素主要有激光功率、掃描速度、掃描間距、鋪粉層厚。文中采用單因素實驗方法研究了316 L和環氧樹脂粉末間接燒結方法。并通過測量燒結件的壓縮強度和尺寸精度,得出不同影響因素對燒結件質量的影響規律。燒結件強度隨激光功率的增大、掃描速度的減小而增大,隨掃描間距的增大、鋪粉層厚的增大而減小;燒結件尺寸精度隨激光功率增大、掃描速度的減小而降低,隨掃描間距的增大、鋪粉層厚的增大而提高;而燒結件表面粗糙度,隨鋪粉層厚的增大而提高。

關鍵詞選擇性激光燒結;單因素實驗;壓縮強度;尺寸精度

Effect of 316L Selective Laser Sintering Parameters on the Properties of Sintered Parts

REN Naifei,HANG Yahui,ZHAO Yan

(School of Mechanical Engineering,Jiangsu University,Zhenjiang 212013,China)

AbstractThe selective laser sintering technology provides a new approach to manufacture metal parts.The properties of the metal parts are affected by many factors.In this paper,the single factor experiments are employed to study the indirect SLS of the mixed powder of 316L and epoxy resin.The factors investigated are laser power,scanning speed,scan spacing and layer thickness.The compressive strength and dimensional accuracy of the parts are measured.The influence of different factors on the properties of the parts is obtained.The compressive strength of the parts increases with the addition of the laser power and lower scanning speed,and decreases with greater scanning space and layer thickness.The dimensional accuracy of the parts is reduced by the addition of the laser power and the lower scanning speed,and improved by addition of the scanning space and layer thickness.The surface roughness of the parts is improved by the addition of the layer thickness.

Keywordsselective laser sintering;single factor experiment;compressive strength;dimensional accuracy

選擇性激光燒結(Selective Laser Sintering,SLS)是一種發展較快的快速成型技術。其利用計算機對激光器進行控制,使激光束有選擇性地掃描粉末,使其單層成型,再逐層疊加,從而完成零件制造[1]。SLS分為直接燒結和間接燒結兩種,本文實驗所使用的是間接燒結法[2]。間接選擇性激光燒結是將金屬與有機材料混合粉末燒結成型的方法。混合物中有機材料作為粘結劑,在燒結時起粘結作用;金屬粉末作功能材料。

國內外學者對SLS技術做了大量研究,并取得了一些成果。美國學者Kamatchi和Neal等人制備鋁粉和聚合物覆膜粉末,進行間接燒結研究[3]。……