WSC 110 · Welding Construction
Session 4 · Hour 1 · Heat has a map
Instructor cue 열에도 지도가 있다.
90 minNow Open · 5 min left · next Demo
Slow the cool. Name the band.
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The band beside the bead is the HAZ.
Thick plate and a T fillet dump heat. They cool fast.
Preheat 50 to 150 to keep martensite out.
At 730 degrees the example HAZ is 5.9 mm.
Metallurgy likes low heat. Fine dendrites.
Cool faster than critical. Martensite. Hydrogen crack.
CheckTorch the T on 20 mm. Keep the cool under critical. Preheat in band. HAZ named.