ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
By low temperature gas multi-component thermochemical treatment, C, N, and O three elements aresimultaneously infiltrated into the surface of steel 20, forming a dense, homogeneous, 50μmpenetrating layer and about 150μm transition layer. X ray diffractometer and sweep electronmicroscope are used to measure the phase components and surface morphology. The results show thatthe penetrating layer is mainly composed of oxides and nitrides. After gas multi-componentthermochemical treatment, the hardness on the surface penetrating layer of steel 20 may reach up toover 800HV, 3 times more than that of the original material; the hardness of transition layer is about300HV, also higher than that of the original material. Within the temperature range of the test, thesurface hardness increases with the rise of heating temperature, and the thickness of penetrating layeralso increases with the rise of temperature. The tribological experiment shows that aftermulti-component thermochemical treatment, the lowest friction factor of steel 20 is 0.25, while thefriction factor of the original material is 0.5; the wear resistance was improved
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.575-578.1097.pdf
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