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Journal of Projectiles, Rockets, Missiles and Guidance >

2019 , Vol. 39 >Issue 4: 93 - 96

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2019.04.022

Analysis of Magnetic Particle Indication for Shell of SRM

  • ZHANG Linfang
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  • China Airborne Missile Academy, Henan Luoyang 471009, China

Received date: 2018-10-07

  Online published: 2025-05-19

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Abstract

The cause of the linear magnetic mark of 18Ni martensite motor shell was analyzed by means of metallographic observation, energy spectrum analysis and phase change point calculation. The results show that the alloy elements Ti, Mo and Ni segregation exist in the engine shell material, resulting in the reduction of Ms and Mf at the martensite phase transition point. Because of the significant inconsistencies in the physical magnetic properties of austenite (paramagnetic) and martensite (ferromagnetic), linear magnetic traces are formed. The residual austenite can be effectively reduced and the magnetic mark can be reduced by aging treatment.

Key words： solid rocket motor; 18Ni maraging steel; magnetic particle testing; segregation; aging

Cite this article

ZHANG Linfang . Analysis of Magnetic Particle Indication for Shell of SRM[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2019 , 39(4) : 93 -96 . DOI: 10.15892/j.cnki.djzdxb.2019.04.022

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