Recent status of overlay by plasma transferred arc welding technique

Deshmukh, D. D.; Калыанкар, В. Д.

doi:10.1504/ijmpt.2018.089118

Cited by 20 publications

(7 citation statements)

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“…Lower dilution of Fe content can result in higher hardness as was observed in sample WBL. Since, less dilution of Fe favours higher hardness for hardfacing operations [2,8]. Further, Cr percentage has increased values in sample WBL (with buffer layer) compared to sample WOBL (without buffer layer).…”

Section: Elemental Analysismentioning

confidence: 98%

“…EDS analysis has been conducted for the sample of WBL and for the sample of WOBL in the hardfacing region which is represented in Figure 10a and 10b respectively. Dilution of Fe is considered for this study as Fe content acts as the most significant factor affecting hardness value [2,8]. EDS spot for Fe content is measured just above the fusion line which is the matter of interest for evaluating mechanical properties.…”

Section: Elemental Analysismentioning

confidence: 99%

“…However, hardness of hardfacing layer has been compromised with suggested solutions in terms of buffer layer [5] and nickel based hardfacing layer [2,7] for the said challenges. Hardness can be critical investigation aspect where industrial applications demand high temperature wear resistance and increased life span of manufacturing components [5,8]. Hence, the influence of suitable buffer layer, higher coating hardness, lower HAZ hardness and replacement of cobalt based hardfacing materials are targeted research areas in this work.…”

Section: Introductionmentioning

confidence: 99%

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Development of NiCrSiBC Weld Hardfacing Approach for P91 Steels Used in Steam Turbine Components

Naik

Калыанкар

2021

Soldag. insp.

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P91 steels are used as substrate material for steam turbine components like bush, valve seat internals, and engineering valves. These components have hardfacing of cobalt-based material to reduce the high temperature wear loss and to improve the surface hardness. However, delamination failure and higher heat affected zone (HAZ) hardness were identified challenges for P91 steels. Hence, this demands the development of a suitable weld hardfacing approach to resolve the said challenges. In this work, NiCrSiBC (Colmonoy 6) has been considered as a hardfacing material to replace cobalt-based Stellite 6 material due to elimination of radiation activity, lower cost, and higher coating hardness. FCAW and PTA techniques were used to deposit buffer layer (SS-309L) and hardfacing layer (NiCrSiBC) respectively. Sample WBL (with deposition of buffer layer) and sample WOBL (without deposition of buffer layer) are considered approaches to study the metallurgical characterization for each case. Higher coating hardness, lower HAZ hardness and lower Fe dilution were observed in sample WBL. Cr7C3, Cr2B, and Cr5B3 hard phases in block shape together with ϒ- nickel matrix solid solution was observed in coating region of sample WBL. Overall, sample WBL approach was considered to overcome weld hardfacing challenges for steam turbine industries.

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Section: Elemental Analysismentioning

confidence: 98%

Section: Elemental Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Development of NiCrSiBC Weld Hardfacing Approach for P91 Steels Used in Steam Turbine Components

Naik

Калыанкар

2021

Soldag. insp.

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“…According to ASM handbook, form of hardfacing material, cost of material, deposition rate, workpiece characteristics, deposition thickness, and dilution rate are considered aspects to establish welding procedure for components [7]. Amongst them, welding dilution causes the change in the elemental composition of hardfacing material due to the admixture of deposition material and substrate material [7,8]. Current and travel speed are an important process parameter which affect the dilution in hardfacing operation [8].…”

Section: Introductionmentioning

confidence: 99%

“…Amongst them, welding dilution causes the change in the elemental composition of hardfacing material due to the admixture of deposition material and substrate material [7,8]. Current and travel speed are an important process parameter which affect the dilution in hardfacing operation [8]. Parameters like current, travel speed, feed rate are different for 1G and 3G positions due to variance in orientation of substrate material and capillary action of molten pool.…”

Section: Introductionmentioning

confidence: 99%

Influence of Welding Position on Tribological Behavior of SS-309L Cladded Surface on 9Cr-1Mo Steel

Калыанкар¹,

Naik²

2021

Tribol. Ind.

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Welding position is a significant parameter for weld hardfacing operations applicable to engineering valves, coal transmission pipes in thermal power plants, mining industries, etc. Weld deposition is conducted with horizontal (1G) and vertical (3G) positions due to appropriate orientation of various engineering products. However, parameters like current, speed, travel angle, etc. are different for both welding positions. Therefore, it is required to investigate the influence of these two welding positions on tribological characteristics. In the present work, 1G and 3G weld positions are considered for SS-309L weld hardfacing on 9Cr-1Mo substrate material using flux cored arc welding (FCAW) process. Weld deposited surfaces are subjected to essential mechanical and metallurgical characterizations. Results confirm that the surface deposited using 1G position has higher slurry abrasive wear resistance (0.036 gms), lower dilution (14 %), and lower heat affected zone (HAZ) width (1.5 mm) which is significantly better than 3G position. SEM analysis shows fine elongated grains which precipitate from Cr element as nucleation site for the growth resulting in an improved eutectic matrix within fine grain structure. Wear resistance is improved in 1G position due to uniform elemental distribution of Fe and Cr observed with EDS analysis. Hence, 1G position is the best suitable position for weld hardfacing operations.

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Evaluation of Surface Characteristics of PTAW Hardfacing Based on Energy and Powder Supplied

Deshmukh

Калыанкар

2019

Lecture Notes on Multidisciplinary Industrial Engineering

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Recent status of overlay by plasma transferred arc welding technique

Cited by 20 publications

References 0 publications

Development of NiCrSiBC Weld Hardfacing Approach for P91 Steels Used in Steam Turbine Components

Development of NiCrSiBC Weld Hardfacing Approach for P91 Steels Used in Steam Turbine Components

Influence of Welding Position on Tribological Behavior of SS-309L Cladded Surface on 9Cr-1Mo Steel

Evaluation of Surface Characteristics of PTAW Hardfacing Based on Energy and Powder Supplied

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