Improving measures are put forward through cause analysis on unqualified DWTT of L360MB pipeline steel.
分析管线钢l 360 MB落锤不合格的原因，提出生产改进措施。
But for medium thickness pipe DWTT, it usually converse fraction of figure transforming much in break part, and make specimen failure.
但是中厚壁钢管DWTT试验经常产生解理断裂部分塑性变形大的逆向断口，使试样无效。
To determine the parameters required in calculation, the two-specimen DWTT method is deducted to determine the heat dissipation rate formula.
为了给出计算需要的参数，推导了双试件DWTT法测定热耗散比率的公式。
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