(Zr0.55Cu0.3Al0.1Ni0.05)98Er2非晶合金制备及其晶化动力学行为

为了研究SAF2507双相不锈钢（SAF2507 DSS）螺旋桨叶片在含硫酸盐还原菌( SRB)和铁氧化菌(IOB)海水中的耐腐蚀性能,提出一种二次急冷淬火成形技术来成形SAF2507 DSS螺旋桨叶片。同时根据螺旋桨叶片在不同二次急冷淬火成形温度下析出相的类型和析出规律,研究螺旋桨叶片在含SRB和IOB海水中的腐蚀性能。结果表明,当二次急冷淬火成形温度在700℃时,螺旋桨叶片表面析出少量的χ相;达到850℃时,χ相停止析出并完全转化成σ相,析出的σ相达到最大值;超过850℃时,析出的σ相开始急剧减少,到950℃时仅有少量的σ相析出。螺旋桨叶片在不同二次急冷淬火成形温度下,腐蚀电流密度、交流阻抗等电化学性能变化规律与螺旋桨叶片表层χ相和σ相的析出规律、以及χ相和σ相自身的耐腐蚀特征相吻合。二次急冷淬火成形温度在750℃-1050℃之间,螺旋桨叶片的耐腐蚀性能随热成形温度的升高呈增强—降低—增强规律变化,850℃时螺旋桨叶片的耐腐蚀性能最差。螺旋桨叶片二次急冷淬火成形后富Fe的表面特征,在SRB+IOB的作用下,螺旋桨叶片表面钝化膜被破坏,导致耐腐蚀性能降低。     

Improving the Desulphurization in COREX Process by Adjusting the Hot Metal Chemical Composition

The COREX process, which has many advantages, still has high and fluctuating sulfur levels in the hot metal. To overcome the desulfurization problems, several measures were proposed, and the adjustments of chemical compositions of hot metal were explained in the current study. Theoretical calculations and experimental results showed that increments in either of or both silicon and manganese levels were beneficial to the desulfurization from the thermodynamic viewpoint. However, high silicon content would increase the costs of the coal of COREX process and did not meet the requirements of dephosphorization and low slag content in steelmaking. Besides, superfluous manganese was also unnecessary as it would increase the costs of COREX. Therefore, the existing silicon content should be decreased (< 1.5 pct), and the manganese content should be increased in a suitable range (from 0.6 to 0.8 pct) for COREX-3000 in China.     

20#钢在油田采出液中的腐蚀行为研究

采用腐蚀失重法、丝束电极技术和电化学测量技术研究了20#钢在油田采出液中的腐蚀行为。结果表明,在实验周期内可将腐蚀发展过程分为腐蚀初期、腐蚀发展期和腐蚀稳定期,腐蚀初期对应腐蚀情况最为严重;金属同一位置随实验时间延长发生阴阳极极性反转现象,并且随着温度升高,反转周期变短;通过对腐蚀金属整体和局部进行电化学测量研究发现,不同温度、不同位置腐蚀发生类型有所差别。     

霍布金生压力杆法测定砂岩、石灰岩动态破碎应力和杨氏模量

本文用霍布金生压力杆法测定了砂岩、石灰岩的动态破碎应力和杨氏模量,其平均应变率达1×10~2～2×10~2/s。文中对使用这种方法涉及到的一些具体技术问题:如子弹、试件、输入和输出波导杆长度的选择;应变片粘贴;摩擦的影响等给予了详细讨论和说明。对长度/直径=1的试件,实验结果说明:动态与静态相比,砂岩的杨氏模量约提高了30％,强度约提高了40％;石灰岩的杨氏模量约提高了20％,强度约提高了30％。破坏的形式都是沿轴向破裂。     

谐波对山西化工厂10kV补偿电容器运行影响的分析

本针对山西化工厂１０ｋＶ补偿电容器不能投入运行的问题，详细分析了谐波对该厂的影响，并提出了改进意见。     

A study on the hydration rate of natural zeolite blended cement pastes

Natural zeolite is a type of mineralogical material containing large quantities of reactive SiO₂ and Al₂O_3. It is widely used in the cement industry in China as a cement blending material. Like other pozzolanic materials such as silica fume and fly ash, zeolite contributes to concrete strength mainly through the pozzolanic reaction with Ca(OH)₂, Thus, the pozzolanic reactivity of this type of material in comparison with other pozzolans is of much interest. This paper presents experimental results on the compressive strength, degree of pozzolanic reaction, and porosity of zeolite modified cement pastes. These results are compared with those obtained from similar blended cement pastes prepared with silica fume and fly ash replacements. Based on the experimental results, it can be concluded that natural zeolite is a pozzolanic material, with a reactivity between that of silica fume and fly ash. Generally, in blended cement pastes with a lower water-to-cementitious materials ratio, the natural zeolite contributes more to the strength of the pastes. But in the pastes with a higher water to cementitious ratio and a lower cement replacement level it undergoes a higher degree of reaction.     

大倾角综采重型设备的回收工艺与安全管理

本文通过平八矿在大倾角综采面回收重型设备的实践,阐述了大倾角综采面回收重型设备的安全技术管理经验以及存在的问题,并提出几点认识和建议。     

PFBC灰的特征及其综合利用研究

对取自日本国中部电力会社所产PFBC灰进行了特性分析。研究表明,PFBC灰与传统的煤粉炉粉煤灰(OF灰)在化学成分、物相组成及颗粒形态上具有很大差异。针对PFBC灰活性较高的特点,对其进行了综合利用研究,即以PFBC灰和OF灰为原料制作了功能性调湿材料,以PFBC灰和石灰、石膏为原料制备了轻质高强墙体材料。     

顺式对位环己二甲酸异构化的化学平衡和动力学的研究

在高压搅拌釜中，研究了顺式对位环己二甲酸（顺ＨＴＰ）钠盐在水溶液中异构化成反ＨＴＰ钠盐，在２２０～２８０℃的化学平衡和在８０～２２０℃的反应动力学。结果表明，这一反应是放热的一级可逆反应。其化学平衡常数与温度的关系为：１ｎＫ＝　－０．７４７２；反应热为：ΔＨ０＝－８．４９２（ｋＪ／ｍｏｌ）；反应速率常数为：ｋ＝３．５１０×１０（１１）ｅｘｐ（　）（ｈ（－１））；活化能为：Ｅ＝１１０．０（ｋＪ／ｍｏｌ）。     

便携式全光纤荧光计的实验室检测与分析

本文简要介绍一种新型便携式全光纤荧光计的基本工作原理，主要技术指标，按标准浓度油水混合液的配制方法。配制出的不同浓度的O#柴油进行检测试验，通过对原始数据和检测结果的分析表明，该仪器达到技术指标要求，可用于现场实时检测亦可用于实验室检测分析。