ISSN:
1013-9826
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:
The wear-resistance, corrosion resistance, hardness can be greatly increased by using lowtemperature QPQ complex salt-bath treatment. And it is a new strengthening method withoutdistortion in the treating process. The surface of 4Cr14Ni14W2Mo steel was treated using thismethod. The microstructure and depth of the treated surface for the steel were analyzed using SEM.The sliding wear resistance was tested on the M-2000 tester and the micro-hardness was tested using401MVA microscopy hardness tester. The corrosion resistance was tested in the 5%NaCl water byusing spraying method. The experimental results indicate that a certain depth of white layer anddiffusion layer of the steel can be obtained by using low temperature QPQ complex salt-bathtreatment. The nitriding compound layer with high hardness, superior wear resistance and stablemicrostructure, can also be obtained on the surface of the parts. The highest hardness in the surface isHV0.11012. The surface hardness is 2.8 times higher than that of inner part. The depth of white layer isfrom 10 to 12μm. The experimental results and applied results show that the low temperature QPQcomplex salt-bath treatment has many advantages, such as fast nitriding speed, uniform heating, shortprocess time, low treating temperature, small distortion, high production rate, low cost, stablenitriding quality no pollution and so on
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.373-374.260.pdf
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