Correlating Hardness and Welding Dilution with the Abrasion Mass Loss of Hardfacings Welded with Different Currents and Polarities

Oo, Hein Zaw; Muangjunburee, Prapas

doi:10.1007/s11015-018-0604-3

Cited by 6 publications

(6 citation statements)

References 17 publications

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“…The VB hardfacing shows the martenasitic formation (Figure 7) and average hardness value of 526–544 HV, it might be due to rich percentage of C and Cr in the hardfacing. Similar findings were also reported by Oo et al., 32 due to the formation of needle-like martenasitic phases in the weld zone. The LH550 hardfacing shows the highest value of microhardness (722–770 HV) among all the overlays.…”

Section: Resultssupporting

confidence: 91%

Effect of alloying elements in Fe-based hardfacings to improve the abrasive wear behavior of ploughshares

Singh

Chatha

Sidhu

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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Generally, during soil tillage it is seen that farmers complain about the higher wear rate of agricultural implement. Wear of cultivator shovels is one of the major problem faced by farmers in the agricultural sector. Any improvement in the life of ploughshares will be of great significance to the farming sector. The aim of the present work is to improve the life of cultivator shovels by way of hardfacings by shielded metal arc welding process. The wear behavior of bare (EN-47 steel) and four different hardfacings (H1, H2, VB, and LH550) having different chromium content (i.e. 0.86% Cr, 2.4% Cr, 3.19% Cr, and 6.72% Cr) were investigated with regard to wear behavior. A test was conducted on a 60 ha area of the wheat field after harvesting (latitude 30.121207, longitude 75.009159). During the time of cultivation soil was dry and hard. Wear behavior of bare and hardfaced steel was analyzed in terms of weight loss (g/ha) and by wear resistance indices. Techniques like optical microscopy, scanning electron microscopy, X-ray diffraction analysis were used for testing. The hardfaced steel has shown significantly better wear behavior in comparison to bare steel except H2. Wear of ploughshares according to cultivated area was found to be 3.459 g/ha for regular, 3.41 g/ha for H1, 4.267 g/ha for H2, 2.553 g/ha for VB, and 1.993 g/ha for LH550 hardfacing. The WRIs of different hardfacings, i.e. H1, H2, VB, and LH550 were found to be 1.014, 0.81, 1.354, and 1.735.

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Section: Resultssupporting

confidence: 91%

Effect of alloying elements in Fe-based hardfacings to improve the abrasive wear behavior of ploughshares

Singh

Chatha

Sidhu

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Shielded metal arc welding (SMAW) [14,[20][21][22][23] Submerged arc welding (SAW) [14,[24][25][26][27] ~60-65 ~95-99 ~15-30 ~30-50…”

Section: Arc Weldingmentioning

confidence: 99%

“…Buffer layers are usually advisable when depositing hard and brittle alloys, like chrome carbide, to soft substrates, like mild steel [49]. A range of buffer layer materials have been studied [26,87,88]. A study on hardfacing with and without a buffer layer reported lower bond strength between deposits and substrate in the case of hardfacing without using a buffer layer [82].…”

Section: Buffer Layermentioning

confidence: 99%

“…Furthermore, multilayer hardfacing is also suggested to reduce internal surface defects and improve the bonding strength and wear resistance [94]. A range of buffer layer materials have been studied [26,87,88]. A study on hardfacing with and without a buffer layer reported lower bond strength between deposits and substrate in the case of hardfacing without using a buffer layer [82].…”

Section: Number Of Hardfacing Layersmentioning

confidence: 99%

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A Review on Hardfacing, Process Variables, Challenges, and Future Works

Tandon,

Li,

Pan

et al. 2023

Metals

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Hardfacing is an efficient and economical surfacing technique widely used by heavy industries to remediate worn components in service or to enhance the component’s wear characteristics components prior to use. Efficient hardfacing for any targeted application requires precise consideration and understanding of the deposition process, consumables, and substrates. It is also essential to understand the process variables and issues that can occur during the deposition processes, such as dilution and defects in the deposit, including residual stress-induced cracking. Significant research has been published over many years on several aspects of hardfacing, primarily focusing on abrasive wear, corrosion, and impact characterisation using different welding methods and alloy compositions. This paper primarily focuses on reviewing the prior hardfacing literature to systematically summarise the considerations and selection criteria for hardfacing processes and materials. It also presents a discussion on key process variables, such as welding parameters and number of surfacing layers, highlighting their influences during the hardfacing deposition procedure. This paper further discusses issues and challenges in hardfacing practices, such as dilution and cracking. One significant issue investigated is the thermal damage to high-strength steel substrates, with the measurement and characterisation of the damage being key elements. The focus of this investigation is to discuss the optimisation of hardfacing high-strength steel substrates and to communicate potential research areas and prospective applications in the hardfacing industry.

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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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Correlating Hardness and Welding Dilution with the Abrasion Mass Loss of Hardfacings Welded with Different Currents and Polarities

Cited by 6 publications

References 17 publications

Effect of alloying elements in Fe-based hardfacings to improve the abrasive wear behavior of ploughshares

Effect of alloying elements in Fe-based hardfacings to improve the abrasive wear behavior of ploughshares

A Review on Hardfacing, Process Variables, Challenges, and Future Works

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

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