研究目的
To propose a novel method of laser machining combined with high temperature chemical etching (LMHTCE) for drilling film holes in an IN718 superalloy without a recast layer or a heat affect zone (HAZ).
研究成果
The novel method of laser machining combined with high temperature chemical etching (LMHTCE) was successful in drilling holes in an IN718 superalloy without a recast layer or a heat affect zone (HAZ). The optimal defocusing distance was found to be 0 μm in the drilling stage and ?60 μm in the high temperature chemical etching stage for obtaining a hole with a smaller diameter and taper.
研究不足
The study acknowledges the complexity of the laser combined chemical reactions, which resulted in a honeycomb structure on the inner surface of the hole. Future research is needed to explain this phenomenon.
1：Experimental Design and Method Selection:
The study proposed a novel method of laser machining combined with high temperature chemical etching (LMHTCE) to drill film holes in an IN718 superalloy. A solution of hydrochloric acid and sodium nitrate was chosen for its minimal reaction with IN718 at room temperature but rapid reaction under high temperatures.
2：Sample Selection and Data Sources:
IN718 superalloy samples of size 20 × 20 × 1.5 mm3 were used. The chemical composition of the samples was provided.
3：5 mm3 were used. The chemical composition of the samples was provided.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: An electronic balance, an electronic hot plate, distilled water, SEM (HITACHI S-3400 N), EDS, and an IPG ytterbium pulsed fiber laser were used.
4：Experimental Procedures and Operational Workflow:
The process involved drilling holes in air, water, and chemical solutions using a pulsed laser of 1064 nm. The defocusing distance was optimized to minimize the hole diameter and taper.
5：Data Analysis Methods:
SEM and EDS were employed to detect the morphology of the holes and the elemental distribution in different zones.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
