Research Papers: Materials and Fabrication

Cooling Time (t8/5) Model for Submerged Arc Welded Pressure Vessel Steel Using Dimensional Analysis

[+] Author and Article Information
Harish Kumar Arya

Department of Mechanical Engineering,
Sant Longowal Institute of Engineering
and Technology,
Longowal 148106, India
e-mail: arya.iitr@gmail.com

Kulwant Singh

Department of Mechanical Engineering,
Sant Longowal Institute of Engineering
and Technology,
Longowal 148106, India
e-mail: engrkulwant@yahoo.co.in

R. K. Saxena

Department of Mechanical Engineering,
Sant Longowal Institute of Engineering
and Technology,
Longowal 148106, India
e-mail: rksaxena.04@gmail.com

Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received May 6, 2017; final manuscript received September 5, 2017; published online October 19, 2017. Assoc. Editor: Steve J. Hensel.

J. Pressure Vessel Technol 139(6), 061404 (Oct 19, 2017) (6 pages) Paper No: PVT-17-1080; doi: 10.1115/1.4038018 History: Received May 06, 2017; Revised September 05, 2017

Most of the microstructural changes in weldment takes place during weld cooling from 800 ° C to 500 ° C (t8/5) specially in the heat-affected zone (HAZ). Weld strength and cracking tendency can also relate to t8/5. A generalized model using dimensional analysis has been proposed for estimation of the weld cooling time (t8/5) for variable plate thicknesses. The proposed model is based on rotatable central composite designed submerged arc welding (SAW) experiments. The model considers material properties, weld parameters, and environmental conditions for submerged arc welding. The model is validated with experimental data and cooling time observed by other researchers. The adequacy of the model was found to be 97% and able to predict cooling time for a plate thickness ranging from 8 to 41.5 mm thickness.

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Fig. 1

Submerged arc welding machine (Adore Tornado 800) along with temperature measurement system

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Fig. 2

Thermocouple insertion method for temperature measurement

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Fig. 3

Welding fixture for thermocouple insertion

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Fig. 4

Time–temperature graph observed during welding

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Fig. 5

Comparison of experimental and predicted cooling time for SAW

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Fig. 6

Validation of proposed model by Chandel experimental data




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