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。
The milling process of X65 pipe steel and the inspection data of mechanical properties (tensile strength, DWTT and hardness)are introduced in detail.
详细介绍了X65卷板的生产流程和有关力学性能（拉伸性能、冲击性能及硬度）的检验结果。
The delamination crack and its effect on the fracture of pipeline steel were investigated by drop-weight tear test(DWTT)at different temperature and micrograph analysis.
通过对管线钢不同温度的落锤撕裂试验和微观断口分析，研究了DWTT试样断口的分层裂纹及其对断裂的影响。
It shows the reliability of energy testing system of China made DWTT through its development and study as well as its successful application at Angang chemical inspection center.
通过对国产落锤撕裂试验机能量测试系统的开发与研究，以及该系统在鞍钢化检验中心的成功应用，展示了该系统的可靠性。
The method and standard of drop weight tear test were described. It was also discussed how to evaluate the capability of pipeline steel to transit from toughness to fracture by DWTT.
论述了落锤撕裂试验的方法和标准，并对用DWTT来评定管材及其焊接接头的韧脆转化能力进行了探讨。
The method and standard of drop weight tear test were described. It was also discussed how to evaluate the capability of pipeline steel to transit from toughness to fracture by DWTT.
论述了落锤撕裂试验的方法和标准，并对用DWTT来评定管材及其焊接接头的韧脆转化能力进行了探讨。
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