Hot cracks commonly occurred in inside weld as the forming process of SSAW pipe.
螺旋埋弧焊管在成型过程中容易产生内焊热裂纹。
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The influence of Lanthanum, Cerium, Yttrium, Praseodymium and Neodymium on weldhot cracking susceptibility of the pure nickel electrode used for cold welding of cast iron was studied.
The front impact roller causes transverse plastic compression strain in the weld which is in the brittle temperature range, which counteracts the tensile strain which leads to hot cracking.