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Category > Engineering Posted 17 May 2017 My Price 7.00

A surfacing weld is to be applied to a rectangular low carbon steel plate

A surfacing weld is to be applied to a rectangular low carbon steel plate that is 200 mm by 350 mm. The metal to be applied is a harder (alloy) grade of steel, whose melting point is assumed to be, the same. A thickness of 2.0 mm will be added to the plate, but with penetration into the base metal, the total thickness melted during welding = 6.0 mm, on average. The surface will be applied by making a series of parallel, overlapped welding beads running lengthwise on the plate. The operation will be carried out automatically with the beads laid down in one long, continuous operation at a travel speed = 7.0 mm/s, using welding passes separated by 5 mm. Assume that the welding bead is rectangular in cross section: 5 mm by 6 mm. Ignore the minor complications of the turnarounds at the ends of the plate. Assuming that the heat transfer factor = 0.8 and the melting factor = 0.6, determine

(a) the rate of heat that must be generated at the welding source, and

 (b) how long will it take to complete the surfacing operation.

 

 

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Alpha Geek
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Status NEW Posted 17 May 2017 01:05 PM My Price 7.00

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file 1495028222-Answer.docx preview (234 words )
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