电磁轨道材料表面损伤及强化技术研究现状

doi:10.11896/j.issn.1005-023X.2018.01.017

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Abstract

The performance of rail materials is the key to the application of the electromagnetic rail-gun. Under high carrier current and high temperature, the main surface failure forms of the electromagnetic rail are surface gouging, transition and the arc erosion, the current carrying friction and wear. This paper reviews the phenomenon, reasons and microscopic mechanism of gouging. A comprehensive summary of transition and arc erosion are expounded. The characteristics of current carrying friction and wear in the EM rail-gun are also summarized. The aim is to provide basis and reference for the development of new rail materials.

Key words： electromagnetic rail rail material surface failure

Published: 10 January 2018

CLC number:

TJ012.1

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	Articles by authors
	Tao YAN
	Guimin LIU
	Shuo ZHU
	Linfei DU
	Yang HUI

Cite this article:

Tao YAN,Guimin LIU,Shuo ZHU, et al. Current Research Status of Electromagnetic Rail Materials Surface Failure and Strengthen Technology[J]. Materials Reports, 2018, 32(1): 135-140.

URL:

http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.01.017 OR http://www.mater-rep.com/EN/Y2018/V32/I1/135

Sketch map of electromagnetic rail-gun

Gouge dents on the rail of copper alloy and arc erosion morphology

Gouge threshold velocity of different armature materials (rail material is AISI1080 steel)

Gouge threshold velocity of different rail materials (armature material is 7075 Al alloy)

Comparison of gouging on (a) flat and (b) indented rail surfaces

Connection between gouge threshold velocity and hardness of different materials

Mechanism of the gouge happening

Sketch map of transition happening

Arc erosion morphology on Cu-W rail surface

Part of CuCr and Dural rail surfaces after multishot experiments(applied energy: 1.45 MJ)

SEM photomicrograph of Al fused coating with large pores on the copper rail

Mutual fusion layer of Al armature and copper rail

An actual brush armature

Relationship between density specific heat capacity and melting point

Relationship between electrical resistivity and volume/melt energy

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