Detection and Analysis of Spectrum Distribution of Laser Molten Pool in Nickel Silicon Boron Alloy Powder Laser Cladding

Zhenjie, 顾振杰 Gu; Jianbo, 雷剑波 Lei; Chuanpeng, 张传鹏 Zhang; Yunshan, 王云山 Wang

doi:10.3788/cjl201441.1103009

Cited by 1 publication

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“…Photodiodes and spectrometers are commonly used as sensors. Gu et al [2] established a set of real-time monitoring systems for laser molten pools; used a mercury lamp for spectral calibration, and grating spectral detection technology for spectral characteristics analysis; and studied the spectral radiation intensity distribution of melt pools during the forming process of nickel-silicon-boron alloy powder under different process parameters. Chen et al [3] established a spectrum acquisition system using fiber optic spectrometers to study the influence of plasma on laser energy transmission efficiency and forming quality under different process parameters, as well as the relationship between the formation of defects and plasma intensity fluctuations.…”

Section: Introductionmentioning

confidence: 99%

A Real-Time Monitoring Method for Selective Laser Melting of TA1 Materials Based on Radiation Detection of a Molten Pool

Zhou,

Huang,

Chen

2024

Micromachines

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Selective laser melting (SLM) technology is a promising additive manufacturing technology. However, due to the numerous influencing factors in this complex process, a reliable real-time method is needed to monitor the forming process of SLM. The molten pool is the smallest forming unit in the SLM process, the consistency of which can effectively reflect the quality of the printing process. By using a coaxial optical path structure and a compound amplifier circuit, high-speed acquisition of molten pool radiation can be realized. Next, single factor analysis and orthogonal experimentation were used to investigate the influence levels of key process parameters on the radiation of molten pool. In addition, numerical simulation was carried out with the same parameter setting schemes, the results of which are consistent with those in radiation detection experiments. It is shown that the laser power has the greatest effect on the radiation of the molten pool, while the scanning speed and the hatch spacing have little effect on the radiation. Finally, the positioning experiment involving the small hole structure was carried out, and the experimental results showed that the device could accurately locate the position coordinates of the given hole structure.

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Section: Introductionmentioning

confidence: 99%