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Title of Journal: J Coat Technol Res

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Abbravation: Journal of Coatings Technology and Research

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Springer US

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DOI

10.1006/meth.1998.0637

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ISSN

1935-3804

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The effect of hydrogen shielding gas on microstruc

Authors: V V Cay S Ozan M S Gök
Publish Date: 2010/05/22
Volume: 8, Issue: 1, Pages: 97-105
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Abstract

In this study SAE 1020 steel surfaces were separately alloyed with preplaced highcarbon ferrochromium FeCr ferromolybdenum FeMo and ferrotitanium FeTi powders by using a tungsten inert gas TIG heat source By using two different types of shielding gas compositions during the alloying process the study investigated the effects of modified shielding gas composition on the microstructure hardness and abrasive wear resistance of specimens It was observed that with modifications in shielding gas composition the microstructure and volume hardness of the specimens changed and no cracks and voids were formed in the interface area The Xray examinations of the specimens identified Fe FeTi and FeMo phases in their microstructure as the first phase and Cr7C3 Fe3C Fe7C3 and TiC phases as the second phase As a result it was concluded that changes in shielding gas composition in surface alloying process significantly affect specimens’ microstructure and mechanical properties

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