The effects of heat input and polarity on wear resistance of Fe-3.5% Cr steel hardfaced using submerged arc welding

Oo, Hein Zaw; Muangjunburee, Prapas

doi:10.1088/2053-1591/ab34c7

Cited by 1 publication

(1 citation statement)

References 32 publications

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“…The differences in hardness are due to two competing factors: there is more dilution by the buffer layer without added powder, which could by itself lead to lower hardness, but the powder additions slowed the cooling rate, and this contributed to more austenite phase formation in the hardfaced layer. This second factor dominates giving more retained austenite and this decreased the hardness because austenite is soft and ductile with low hardness [46,47]. Therefore, hardness profiles of single layer hardfacing with added metal powder were below single layer hardfacing without powder.…”

Section: Hardnessmentioning

confidence: 99%

Effectiveness of metal powder additions for martensitic hardfacing alloy on its wear properties

Muangjunburee

2020

Surf. Topogr.: Metrol. Prop.

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Selecting welding consumables to get satisfactory results in hard facing weld repair jobs at a low cost is an important consideration. The standard martensitic welding electrodes used for hardfacing are expensive, so an investigation into finding suitable substitutes is a worthwhile activity. The objective of this study was to analyze the hardfacing deposits on using a low carbon steel welding electrode with metal powders added to the weld pool. Four different samples were hardfaced applying a submerged arc welding setup with constant heat input. Single and three layers of hardfacing samples were welded using a standard martensitic electrode and compared to using low carbon steel electrodes with added metal powders. An optical emission spectrometer was used to obtain the chemical compositions of welded metal layers. A scanning electron microscope was used to characterize the metallurgical structures of deposits. SEM images of worn surfaces were also obtained. Microhardnessand abrasive testing were used to examine the mechanical properties of the hardfaced surfaces. The results showed that martensitic microstructures were obtained in the hardfaced deposits using a low carbon steel welding electrode with added metal powders. However, hardness and abrasive wear resistance of both single and three layers of hardfacing using low carbon steel welding electrode with added metal powder were below those achieved by welding with a standard martensitic electrode.

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Section: Hardnessmentioning

confidence: 99%

Effectiveness of metal powder additions for martensitic hardfacing alloy on its wear properties

Muangjunburee

2020

Surf. Topogr.: Metrol. Prop.

View full text Add to dashboard Cite

show abstract

The effects of heat input and polarity on wear resistance of Fe-3.5% Cr steel hardfaced using submerged arc welding

Cited by 1 publication

References 32 publications

Effectiveness of metal powder additions for martensitic hardfacing alloy on its wear properties

Effectiveness of metal powder additions for martensitic hardfacing alloy on its wear properties

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