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中文摘要：
为了评价J55套管钢的力学性能厦其受力变形和热处理对它的影响，沿J55无缝套管钢管的纵向、横向和45°三个方向取样。经过压平和退火热处理，通过拉伸试验评价了该种管钢3个方向有无变形和热处理时管样的力学性能影响。结果表明。不同方向和处理过程的J55钢力学性能不同；原始纵向试样的屈服强度最小，但其断裂伸长率最大＋45°方向压平退火后的屈服强度最大。而伸长率较小；经过同样的变形和热处理过程后，管材试样存在各向异性；通过变形和热处理，谊J55钢的力学强度可得到强化，但其塑性却有所降低。
英文摘要：
To evaluate the mechanical properties and the effect of deformation and annealing on them for J55 casing steel, a comparative study was made for the tensile properties of J55 oil casing steel with specimens cut in three directions and subjected to deformation （flattening） and subsequent annealing. It was found that a mechanical anisotropy occurred in the three directions. Specifically, the original （un-deformed and un-annealed） longitudinal specimens had a minimum yield strength and a maximum ductility, while the specimens cut in 45°direction and subjected to deformation and subsequent annealing possessed at maximum yield strength and a poor ductility. Meanwhile, the mechanical anisotropy occurred in specimens cut in different directions, but subjected to the same deformation and heat treatment, thus indicating that the mechanical properties of the J55 casing steel could be enhanced by deformation and subsequent annealing, but its plasticity could be decreased.
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