n80

Corrosion behavior of n80 ~ # steel in acid solution with h_2so_3

N80~钢在含H2SO3酸性溶液中的腐蚀行为

The influence of surface condition on N80 tubing laser enhancement is studied for obtaining better surface enhancement layer .

为获得较好的表面强化层，研究了表面状态对N80油管激光强化的影响。

This paper studied corrosion behavior of N80 steel in the simulated flow media containing O2 by using recirculating flow loop .

本文采用循环流动腐蚀试验装置，研究了N80钢在模拟含氧流动介质中的腐蚀行为。

Study on the Inhibition Behavior of 2,3,5-Triphenyl Tetrazolium Chloride to N80 ~ # Steel

2,3,5-氯化三苯基四氮唑对N80~钢缓蚀行为的研究

Development of Non-Quenched and Tempered Steel N80 ( F-N80 ) for Oil Well Piping

非调质N80（F-N80）油井管用钢的开发

The subject discussed the influencing factors of N80 steel in without CO_2 saline solution and the saturated CO_2 saline solution firstly .

本文首先研究了N80钢在无CO2盐溶液和饱和CO2盐溶液中各种因素对缓蚀剂效果的影响。

Corrosion datas of steel N80 were analyzed by grey system theory , and GM ( 1,1 ) model was built for the above datas .

利用灰色系统理论，对N80钢氮化在郝现联合站介质中的腐蚀数据进行了灰色分析，建立了对上述数据的GM（1，1）模型。

The testing and analyzing results show the compression yield strength of the steel grades of N80 and P110 are greater than the tension yield strength .

试验结果和分析结果表明，N80、P110钢级材料的压缩屈服强度高于拉伸屈服强度；

To produce non-quenched and tempered N80 steel with low cost , the difficulty is how to add the nitrogen and how to control the content of then .

如何增氮以及怎样控制钢液中氮含量是低成本生产非调质N80钢的难点。

The mechanical property of N80 steel has increased obviously after adding corrosion inhibitor , where the ductility of N80 steel increased , and crack fissure of fracture surface decrease .

添加缓蚀剂后使N80试样的韧性有明显的增加，断口裂纹缝隙明显减小，力学性能有了明显的提高。

The results showed that the hot-dip aluminizing coatings on both the J55 and N80 steels were composed of aluminum layer and Fe-Al intermetallic compound layer .

结果表明：J55和N80钢热浸镀铝后的镀层组织均可分为纯铝层和铁铝金属间化合物层两层；

Since 1990 the principal compressive stress axis have rotated toward east and the angle is larger than that in the first time interval , extending to N80 ° - 95 ° E.

1990年至现在其主压应力又向东偏转，角度大于第一阶段，约为N80°－95°E。

The calculated results indicate that the maximum thermal stress occurs in the internal wall of the casing pipe and is over the thermo-elastic yield ultimate stress of casing pipe made of N80 steel .

计算结果表明，最大热应力都发生在套管内壁，且超过了N80套管的热弹性屈服极限；

The linear polarization direction angles in magnetostatic and electromagnetic storm days are stable ; the change is from N80 ° W to N100 ° W. They deflect obviously when there are interfere and thunderstorm .

拟合极化方向角在静日和有电磁暴时，在N80°W~N100°W内摆动，较稳定，有干扰和雷电时极化方向明显偏转；