Effects of Micro Arc Strengthening on Microstructure and Properties of QT600-3

ZHAO Shuai

doi:10.16577/j.cnki.42-1215/tb.2021.02.020

Materials Protection >

2021 , Vol. 54 >Issue 2: 113 - 117

DOI: https://doi.org/10.16577/j.cnki.42-1215/tb.2021.02.020

Effects of Micro Arc Strengthening on Microstructure and Properties of QT600-3

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(Hebi Institute of Engineering and Technology, Henan Polytechnic University, Hebi 458030, China)

Received date: 2020-09-20

Online published: 2025-07-10

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Abstract

The cast iron QT600-3 can make crankshaft, camshaft, connecting rod shaft, gear, hydraulic cylinder, etc. It requires not only corresponding hardness and strength, but also good wear resistance and surface fatigue resistance. The micro-arc hardening was carried out on the surface of QT600-3. Results of orthogonal test showed that when the current was 19 kA, the speed of work piece was 0.7 r/min and the contact pressure was 600 N, a white layer composed of uniform and fine martensite, cementite and retained austenite was formed on the surface of QT600-3. The hardness of the hardened layer reached 850 HV2 N. Friction and wear tests showed that the layer greatly improved the wear resistance of the material.

Key words： micro arc strengthening; QT600-3; microstructure; mechanical properties

Cite this article

ZHAO Shuai . Effects of Micro Arc Strengthening on Microstructure and Properties of QT600-3[J]. Materials Protection, 2021 , 54(2) : 113 -117 . DOI: 10.16577/j.cnki.42-1215/tb.2021.02.020

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