本研究使用密鍊機將17-4 PH不鏽鋼粉末與塑基黏結劑混合後會形成複合金屬粉末，相較於原始粉末有較低之反射率與較大粒徑。使用Sinterit Lisa SLS 3D Pinter商用列印機進行，該設備具有5 W 808 nm波長之高功率半導體雷射，可給予複合粉末能量，使複合粉末上的黏結劑熔融成形，將其層層堆疊，最終獲得立體物件。並使用梳形鋪粉輔具可有效改善列印槽硬化結塊問題，且梳形鋪粉輔具高度在0.4 mm之下，具有最佳鋪粉之效果。列印參數在140 ℃ 雷射功率35.87 mJ/mm2列印層厚100 μm下，可獲得最高密度3.61 g/cm3且形狀完整之生坯。
後製程使用草酸脫脂在140 ℃時重量損失率可達4.39 %。收縮試片經由1310 ℃持溫180 分鐘燒結過後， X軸向收縮率為21.20 %~22.03 %；Y軸向收縮率為21.46 % ~22.12 %；Z軸向收縮率為21.61 % ~21.85 %。使用三種收縮補正方法中，當中最理想補正方法為最小二法補正，大部分誤差值小於0.1 mm。塑基坯體拉伸強度為605.64 MPa，相比蠟基坯體提高78.52 %；硬度為HRC 14.80，相比蠟基坯體提高56.50 %。並經由H900時效處理拉伸強度提升至931.89 MPa，相比本論文銀坯提高了35.01 %；硬度為HRC 30.76，本論文銀坯提高了87.86 %。
有別於選擇性雷射熔融技術(SLM)，需要惰性或真空環境下與需要大功率雷射，本研究所使用之選擇性雷射燒結技術(SLS)，可在大氣下進行列印，且可用較低功率成型，可以安全且有效率獲得所要之形貌。

In this study, the 17-4 PH stainless steel powder was mixed with a plastic-based binder using a chain sealer to form a composite metal powder, which had lower reflectivity and larger particle size than the original powder. Using a Sinterit Lisa SLS 3D Pinter commercial printer, the device has a high-power semiconductor laser with a wavelength of 5 W 808 nm, which can give energy to the composite powder, melt the binder on the composite powder, and stack them layer by layer. Get 3D objects. And the use of comb-shaped powder coating aids can effectively improve the problem of hardening and agglomeration of the printing tank, and the height of the comb-shaped powder coating aids is less than 0.4 mm, which has the best powder coating effect. Printing parameters At 140 ℃, the laser power is 35.87 mJ/mm2 and the printing layer thickness is 100 μm, the green body with the highest density of 3.61 g/cm3 and complete shape can be obtained.
After degreasing with oxalic acid, the weight loss rate can reach 4.39 % at 140 ℃. After the shrinkage test piece was sintered at 1310 °C for 180 minutes, the shrinkage rate in the X-axis direction was 21.20%-22.03%; the shrinkage rate in the Y-axis direction was 21.46 %-22.12 %, and the shrinkage rate in the Z-axis direction was 21.61 %-21.85%. Among the three shrinkage correction methods, the most ideal correction method is the least square correction, and most of the error values are less than 0.1 mm. The tensile strength of the plastic-based blank is 605.64 MPa, which is 78.52 % higher than that of the wax-based blank; the hardness is HRC 14.80, which is 56.50 % higher than that of the wax-based blank. And after the H900 aging treatment, the tensile strength increased to 931.89 MPa, an increase of 35.01%; the hardness was HRC 30.76, an increase of 87.86%.
Different from selective laser melting (SLM), which requires an inert or vacuum environment and a high-power laser, the selective laser sintering (SLS) used in this study can print in the atmosphere, and Multiple lasers can be used to form a page-wide laser system for high-speed printing, and the desired appearance can be obtained safely and efficiently.

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