The mechanical properties such as fatigue, transverse impact toughness and anisotropic properties of steels treated with Ba-containing alloys are remarkably improved.

经含钡合金处理的钢材力学性能，如疲劳、横向冲击韧性和各向异性可得到显著改善。

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Test results show that such steel can be mass produced with technology of a large converter plus the secondary refining, which can insure drill pipes for the transverse impact toughness.

试验表明，采用合适的冶炼工艺，大型转炉加炉外精炼能够批量生产超低硫低磷钻杆用钢，使钻杆获得高横向冲击韧性。

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The anisotropic characteristic which usually exists in materials disappeared completely especially the notch - impact toughness at the transverse direction was increased by 2-3 times.

因此在通常材料中所存在的各向异性完全消失，特别是缺口冲击韧性横向性能值提高了2～3倍。

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