The Effect of Shielding Gas Composition on Microstructure and Abrasive Wear Resistance Fabricated with PTA Alloying Technique

The Effect of Shielding Gas Composition on Microstructure and Abrasive Wear Resistance Fabricated with PTA Alloying Technique

Powierzchnie stalowe SAE 1020 były oddzielnie stopowane z wcześniej nałożonymi proszkami wysokowęglowego żelazo- chromu (FeCr), żelazo-molibdenu (FeMo) i żelazo-tytanu (FeTi) za pomocą techniki PTA. Dzięki zastosowaniu trzech różnych typów gazu osłonowego w trakcie procesu wytwarzania stopu, badano...

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Bibliographic Details
Main Authors: Çay V.V., Ozan S., Gök M.S., Erdoğan A.
Format: Article
Language:English
Published: Polish Academy of Sciences 2013-12-01
Series:Archives of Metallurgy and Materials
Subjects:
In this study
SAE 1020 steel surfaces were separately alloyed with preplaced high-carbon-ferro-chromium (FeCr)
ferro-molybdenum (FeMo) and ferro-titanium (FeTi) powders by using plasma transferred arc (PTA) heat source. By using three 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. The most homogenous microstructure and the highest wear resistance was obtained in the gaseous environment which included 3% of H2. Increasing this rate to 5 % in the shielding gaseous composition caused gaps and pores in the microstructure and caused a decrease in the wear resistance. The x-ray examinations of the specimens identified ferro-molybdenum and ferro-titanium solid solutions
ferrit
austenite and martensite phases in their microstructure as the first phase and FeC
Cr7C3
Cr3C2
Fe3C
Fe7C3
MoC and TiC phases as the second phase. As a result
it was concluded that changes in shielding gas composition in surface alloying process affected specimens’ microstructure and abrasive wear properties
Online Access:http://www.degruyter.com/view/j/amm.2013.58.issue-4/amm-2013-0138/amm-2013-0138.xml?format=INT

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http://www.degruyter.com/view/j/amm.2013.58.issue-4/amm-2013-0138/amm-2013-0138.xml?format=INT

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