Failure analysis of the piston used in a pneumatic down the hole impactor

Wang, Jialin; Han, Bin; Wang, Chun; Gong, Yu; Li, Yongsheng; Neville, Anne; Morina, Ardian

doi:10.1016/j.engfailanal.2021.105561

Cited by 4 publications

(2 citation statements)

References 29 publications

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“…Jialin wang, et. al., [5] examined the impactor's pneumatic downfall mechanism for failure. The occurrence of the carbide coating on the piston causes the piston to crack.…”

Section: Literature Surveymentioning

confidence: 99%

Analysis of Piston Failure: A Review

2022

IRJMETS

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In automotive failures has become a major concern. Piston is one of the main parts of the engine. In this report a study is conducted on the piston failure by using different methods. The major causes are increase in temperature, improper carburization techniques, improper coating, improper combustion, the improper combustion causes carbon deposits etc. There are different types of methods are used to analyze the piston failures they are wear bench test, hardness test Vickers meter to know the depth of carburized layer etc. Visual examination is conducted by the SEM (Scanning Electron Microscopy), EDS (Energy dispersive spectrometry), EDX (Energy Dispersive X-ray spectroscopy). Spectroscopy Chemical analysis is used to know the chemical composition in the piston. The failure of the piston was studied using finite element software such as ABACUS and ANSYS.

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“…Jialin wang, et. al., [5] examined the impactor's pneumatic downfall mechanism for failure. The occurrence of the carbide coating on the piston causes the piston to crack.…”

Section: Literature Surveymentioning

confidence: 99%

Analysis of Piston Failure: A Review

2022

IRJMETS

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“…During the working process, the mating surfaces rub against each other. When the impact efficiency is significantly reduced due to wear, the piston will fail and be scrapped [3][4]. Therefore, the main failure forms of the piston are the depression of the impact section, the wear of the spline and the collapse and fracture of the spline at the impact end [5].…”

Section: Introductionmentioning

confidence: 99%

Failure analysis of the piston used in a pneumatic down the hole impactor

Pan

Chen

et al. 2022

J. Phys.: Conf. Ser.

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In this paper, the failure mechanism of the piston in the pneumatic down the hole (DTH) impactor has been studied. Failed piston microstructure has been analyzed using the light optical microscopy (OM) and scanning electron microscope (SEM). Impact toughness test and the Rockwell hardness test were conducted. Results showed the following: a) The carburizing layer of IQCT failed piston is mainly composed of acicular martensite and lower bainite after the carburizing-tempering-isothermal quenching-cryogenic treatment-tempering (IQCT), and there are collapses on the impact side and outer surface of the piston, mainly fatigue failure. b) IQT failed piston samples are subject to carburizing-tempering-isothermal quenching-tempering treatment (IQT). The carburized layer is mainly composed of high-carbon martensite, carbide and retained austenite. The transition layer is still composed of lower bainite and acicular martensite, but the volume fraction of lower bainite increases significantly and the core is mainly composed of lower bainite. It has the best impact toughness, up to 61.5 J/cm2, which is mainly fatigue failure. c) OQT failed piston sample is subject to carburizing-tempering-oil quenching-tempering (OQT). The carburized layer is mainly composed of acicular martensite, the transition layer is composed of acicular martensite (AM) and lath martensite (LM), and the core is mainly composed of LM. The impact toughness of the sample is the worst. Therefore, fatigue fracture failure is caused.

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