Microstructure and Mechanical Properties of 40CrNiMo7 Steel after High Current Pulsed Electron Beam Treatment

Hui Hui Wang; Sheng Zhi Hao

doi:10.4028/www.scientific.net/AMM.423-426.276

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 423-426Microstructure and Mechanical Properties of...

Microstructure and Mechanical Properties of 40CrNiMo7 Steel after High Current Pulsed Electron Beam Treatment

Abstract:

High current pulsed electron beam (HCPEB) treatment was conducted on 40CrNiMo7 steel. The surface microstructure was characterized by metalloscopy and X-ray diffraction methods. The microhardness and wear resistance of modified surface were measured. After the HCPEB treatment, the surface crater structure was observed due to the inhomogeneity of initial material. A modified layer of depth ~ 7 μm was formed with a hybrid microstructure composed mainly of martensite and a small quantity of austenite. The surface microhardness of HCPEB modified sample was increased drastically to more than 1000 HK. The wear resistance increased by about 36% as compared to the initial state.

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Periodical:

Applied Mechanics and Materials (Volumes 423-426)

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276-280

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https://doi.org/10.4028/www.scientific.net/AMM.423-426.276

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Online since:

September 2013

Authors:

Hui Hui Wang, Sheng Zhi Hao

Keywords:

40CrNiMo7 Steel, High Current Pulsed Electron Beam, Microhardness, Microstructure, Wear Resistance

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