Temperature during pole cladding
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When using electrode cladding or manual cladding, does the temperature of the workpiece surface increase? And to what extent can it rise? Will it damage its heat treatment condition? If so, do all surfaced components require heat treatment?
If the substrate is chrome-molybdenum steel and its thickness exceeds a certain number of millimeters (I can’t remember the exact value), heat treatment is required.
This post was last edited by realben on 2010-4-8 at 10:12. The welding temperature is high enough to damage the heat-treated condition, in my opinion. The base Cr-Mo steel, regardless of its thickness, definitely needs to be heat-treated; it should be heat-treated after the transition layer has been welded, and then the corrosion-resistant layer can be welded, without the need for heat treatment on that layer. As for the relationship between thickness and heat treatment, I think it should be based on the relationship between wall thickness and heat treatment as recommended in Table 5 of JB4709. Moreover, the thickness referred to there should be the thickness of the base layer, since it is the carbon steel in the base layer that is primarily affected. I’m not sure if what I’m saying is correct; please let me know
Thank you for the answers from the two people above. Table 5 in JB4709 refers to the thickness that needs to be preheated, right? Does it have anything to do with heat treatment?
I’m sorry for the mistake; it’s Table 6. The relationship between surfacing and heat treatment seems to follow the principle stated in standard 150 – that is, certain steels of specific thicknesses require heat treatment – and the wall thickness should be taken as that of the base layer.