Comparison of empirical and predicted substrate temperature during surface melting of microalloyed steel using TIG technique and considering three shielding gases

P. Munoz-Escalona, A. Walker, A. Ogwu, S. Mridha, T.N. Baker

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Abstract

Erosion and wear resistance of steel can be enhanced by incorporating a ceramic powder in the surface. This aspect of surface engineering has applications in areas such as mining, agriculture and transport. An economic alternative to laser for melting the surface is by using a tungsten inert gas torch. The process requires shielding gas to protect the melted and re-solidified track from oxygen and hydrogen in the environment, which often have a deleterious effect on the mechanical properties of the modified surface. During the melting process, the heat produced is conducted to the substrate ahead of the torch; this has been described as ‘preheat’ giving a temperature several hundred degrees higher than the area under the torch. To reduce the number of trial and error experiments for determining the optimal conditions to modify the surface, a mathematical model, based on the Rosenthal approach, was developed. Experiments using TIG technique were conducted on microalloyed steel using argon, helium and nitrogen shielding gases to obtain heating and cooling curves from positions along the melted track. The data for argon was compared with the model. This first attempt to validate the model was satisfactory, showing a deviation of 6% (35 °C) between experimental and numerical values.
Original languageEnglish
Pages (from-to)179-183
Number of pages5
JournalApplied Surface Science
Volume477
Early online date6 Nov 2017
DOIs
Publication statusPublished - 31 May 2019

Fingerprint

Steel
Shielding
surface temperature
shielding
Melting
Gases
torches
melting
steels
Substrates
gases
Argon
Temperature
argon
Noble Gases
Helium
Tungsten
agriculture
Inert gases
wear resistance

Keywords

  • surface engineering
  • TIG
  • temperature prediction
  • mathematical model

Cite this

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abstract = "Erosion and wear resistance of steel can be enhanced by incorporating a ceramic powder in the surface. This aspect of surface engineering has applications in areas such as mining, agriculture and transport. An economic alternative to laser for melting the surface is by using a tungsten inert gas torch. The process requires shielding gas to protect the melted and re-solidified track from oxygen and hydrogen in the environment, which often have a deleterious effect on the mechanical properties of the modified surface. During the melting process, the heat produced is conducted to the substrate ahead of the torch; this has been described as ‘preheat’ giving a temperature several hundred degrees higher than the area under the torch. To reduce the number of trial and error experiments for determining the optimal conditions to modify the surface, a mathematical model, based on the Rosenthal approach, was developed. Experiments using TIG technique were conducted on microalloyed steel using argon, helium and nitrogen shielding gases to obtain heating and cooling curves from positions along the melted track. The data for argon was compared with the model. This first attempt to validate the model was satisfactory, showing a deviation of 6{\%} (35 °C) between experimental and numerical values.",
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author = "P. Munoz-Escalona and A. Walker and A. Ogwu and S. Mridha and T.N. Baker",
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Comparison of empirical and predicted substrate temperature during surface melting of microalloyed steel using TIG technique and considering three shielding gases. / Munoz-Escalona, P.; Walker, A.; Ogwu, A.; Mridha, S.; Baker, T.N.

In: Applied Surface Science, Vol. 477, 31.05.2019, p. 179-183.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Comparison of empirical and predicted substrate temperature during surface melting of microalloyed steel using TIG technique and considering three shielding gases

AU - Munoz-Escalona, P.

AU - Walker, A.

AU - Ogwu, A.

AU - Mridha, S.

AU - Baker, T.N.

N1 - Acceptance from webpage AAM: 12m embargo Merged dup record 26113601. Bib notes attached to subsumed record: "Query to author re acceptance and AAM. Not found online - has it been published? Data is from previous HEI repository. ET 28/5/19 ^Appears to be duplicate (PURE ID: 26113521) 30/5/19 DC" Author start date at GCU is after acceptance > apply exception 254a. ET 13/11/19

PY - 2019/5/31

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N2 - Erosion and wear resistance of steel can be enhanced by incorporating a ceramic powder in the surface. This aspect of surface engineering has applications in areas such as mining, agriculture and transport. An economic alternative to laser for melting the surface is by using a tungsten inert gas torch. The process requires shielding gas to protect the melted and re-solidified track from oxygen and hydrogen in the environment, which often have a deleterious effect on the mechanical properties of the modified surface. During the melting process, the heat produced is conducted to the substrate ahead of the torch; this has been described as ‘preheat’ giving a temperature several hundred degrees higher than the area under the torch. To reduce the number of trial and error experiments for determining the optimal conditions to modify the surface, a mathematical model, based on the Rosenthal approach, was developed. Experiments using TIG technique were conducted on microalloyed steel using argon, helium and nitrogen shielding gases to obtain heating and cooling curves from positions along the melted track. The data for argon was compared with the model. This first attempt to validate the model was satisfactory, showing a deviation of 6% (35 °C) between experimental and numerical values.

AB - Erosion and wear resistance of steel can be enhanced by incorporating a ceramic powder in the surface. This aspect of surface engineering has applications in areas such as mining, agriculture and transport. An economic alternative to laser for melting the surface is by using a tungsten inert gas torch. The process requires shielding gas to protect the melted and re-solidified track from oxygen and hydrogen in the environment, which often have a deleterious effect on the mechanical properties of the modified surface. During the melting process, the heat produced is conducted to the substrate ahead of the torch; this has been described as ‘preheat’ giving a temperature several hundred degrees higher than the area under the torch. To reduce the number of trial and error experiments for determining the optimal conditions to modify the surface, a mathematical model, based on the Rosenthal approach, was developed. Experiments using TIG technique were conducted on microalloyed steel using argon, helium and nitrogen shielding gases to obtain heating and cooling curves from positions along the melted track. The data for argon was compared with the model. This first attempt to validate the model was satisfactory, showing a deviation of 6% (35 °C) between experimental and numerical values.

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