Reliability Prediction of Precision Parts of Fuel Pumps with Enhanced Surface Hardness Achieved Through Laser Technology

Authors

• Alakbar Huseynov Azerbaijan Technical University, Baku, Azerbaijan
• Farid Huseynli Phd https://orcid.org/0009-0007-5393-9440
• Mirzabay Safarov National Aerospace Agency, Baku, Azerbaijan

DOI: https://doi.org/10.30678/fjt.152491

Keywords:

reliability, prediction, laser, diffusion layer, failure

Abstract

Reliability is defined as a product's ability to perform its intended functions within specified limits (such as distance, workload, cycle count, etc.) and over a designated period of time (ISO 9000:2015). By transitioning to discrete random variables, the random number of non-failure tests (interactions) of the predicted object, along with the additional distribution function (reliability function) and the characteristic parameters of the object, can be expressed through the distribution functions of random variables that characterize the operation of machines and devices. To ensure the reliability of precision parts of fuel pump, the average value of the deformation error layer resulting from heating in laser surface hardening should be 18 μm (36 μm in diameter). This scientific work investigated precision parts of fuel pump that were subjected to laser chromium diffusion metallization in vacuum. Furthermore, to achieve the desired reliability in precision parts of fuel pump through laser surface treatment, it is recommended that the hardened layer thickness be maintained within the range of 125 μm to 130 μm.  After the mechanical processing process, an 8-12 μm reinforced layer remains on the surface, which ensures the reliability of precision parts of fuel pump during operation. This study presents the reliability predicting of precision parts of fuel pump with enhanced surface hardness achieved through laser technology. The theoretical predictions were validated through experimental results, demonstrating the effectiveness of the proposed model in assessing the durability and performance of laser-hardened precision parts of fuel pump.