人工神经网络方法预测P110油套管钢稀土渗铬层的厚度

利用人工神经网络原理,建立了反映P110油套管钢(P110钢)稀土渗铬工艺参数与渗铬层厚度关系的预测模型。结果显示:该模型可以对选定工艺条件下渗铬层厚度进行良好的预测,预测结果在合理的误差范围内,建立的模型是可靠的,可以通过此模型优化工艺参数,实现P110钢稀土渗铬层厚度预测。

P110石油套管外表面缺陷分析

某公司生产的P110钢级套管探伤合格率低,结合该产品生产过程对外表面缺陷的宏观、微观进行了分析。结果显示,缺陷为轧制过程中的小折叠。通过改进措施,有效改善了缺陷。

Slurry erosion behaviors of P110 steel and chromizing coating in liquid-solid two-phase flow

A chromizing coating was formed on P110 oil casing tube steel (P110 steel) via pack cementation to improve its performance and increase the lifetime during operation. The slurry erosion behaviors of the P110 steel substrate and the chromizing coating were assessed in a liquid-solid two-phase flow condition. The results showed that the obtained coating exhibited higher surface hardness, lower mass loss, and lower slurry erosion rate than those of P110 steel. The chromizing treatment has significantly improved the surface hardness and slurry erosion resistance of P110 steel.

电针配合耳穴贴压治疗胸腰段带状疱疹后遗神经痛的疗效观察

目的:观察电针配合耳穴贴压治疗带状疱疹后遗神经痛的临床疗效。方法:将110例胸腰段带状疱疹后遗神经痛的患者随机分成治疗组(电针配合耳穴贴压)和对照组(药物),观察两组治疗后的临床疗效及VAS、QS评分的变化。结果:治疗组和对照组的总有效率分别为90.91%和76.36%,两组比较有显著性差异(P<0.05)。治疗前两组患者VAS及QS评分差异无统计学意义(P>0.05)。治疗后两组患者的VAS评分均较治疗前下降(P<0.05),而治疗组降低较对照组明显(P<0.05)。治疗后两组患者的QS评分均较治疗前升高(P<0.05),而治疗组升高较对照组明显(P<0.05)。结论:表明采用电针配合耳穴贴压治疗带状疱疹后遗神经痛具有确切的疗效,能明显缓解患者的疼痛,改善患者的睡眠质量,值得临床推广。