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X70

X70

X70

X70

1

Salt concentration difference macrocell corrosion of X70 steel in yellow pebble soil was studied by means of EIS and weight loss method .

利用电化学阻抗法和失重法，研究了 X70 钢在卵石黄泥土中的盐浓差宏电池腐蚀。

2

3

It also looks forward to the application prospect of laser welding technology in pipeline welding of X70 pipeline steel .

展望了激光焊接技术在管道焊接中尤其 X70 管线钢时的应用前景。

4

The difference of the hot ductility of X65 and X70 pipeline casting blank is mainly discussed .

讨论了 X65 、X70 管线钢铸坯不同温度区间高温延塑性的差异。

6

X70 pipeline steels , microalloyed steel and low carbon produced by TMCP process, possess high strength and good toughness .

X70 管线钢是控轧控冷的低碳微合金钢，具有高强高韧性。

7

First , microstructure of four steels is observed by SEM. The results show that, X70 steel is composed by ferrite and pearlite structure;

首先，对四种钢的金相显微组织进行了观察，发现 X70 管线钢由铁素体、珠光体组成。

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