Preparation and characterization of mullite whisker reinforced ceramics made from coal fly ash

Ceramics with mullite whiskers were prepared from coal fly ash and Al₂O₃ raw materials, with AlF₃ used as an additive. The phase structures and microstructures of the ceramics were identified via X-ray diffraction and scanning electron microscopy, respectively. The results show that pickling of coal fly ash is an effective method for enhancing the flexural strength of ceramics. Sintering temperature and AlF₃ addition were also key factors influencing the creation of ideal ceramics. The ceramic made from pickled coal fly ash, 6?wt% AlF₃, and sintered at 1200?°C, exhibited the highest flexural strength of 59.1?MPa, and had a bulk density of 1.32?g/cm³ and porosity of 26.8%. The results show that ceramic materials made under these conditions are ideal candidates for manufacturing ceramic proppants for the exploitation of unconventional oil and gas resources.     

冷轧厂酸洗机组3号横剪大流量中高压液压系统设计方案探讨

在宝钢２０３０ｍｍ冷轧厂酸洗机组中，为了满足厚规格ＩＦ钢的生产，拟将原有的气动式剪切机改成液压式剪切机。为此，设计了一套中高压大流量的液压系统以满足３号横剪大剪切力（最高达７００ｋＮ）和快速剪切（３秒／次）的需要。由于采用了蓄能器增速回路和二通插装阀控制技术，使该液压系统较传统的剪切机液压系统具有响应速度快、体积小、重量轻、发热少和降低电机能耗等优点。     

无润滑空气压缩机冷却水系统的清洗

介绍了无润滑空气压缩机冷却水系统结垢的危害性，阐述了清洗的原理，提出了清洗时应注意的工艺参数，操作时的注意事项和由此带来的经济效益。     

盐酸酸洗高速线材的锈斑问题研究

采用俄歇电子能谱(AES)及X光电子能谱(XPS)研究了高速线材经盐酸酸洗表面锈斑的成分结构及成因。结果表明，高速线材形成的黄色锈斑以多孔疏松的Fe2O3、Fe-OH结构为主。高速线材经盐酸酸洗出现黄色腐蚀条纹，与高速线材生产工艺有直接关系。     

基于PLC的蚕种浸酸控制系统

本文对蚕种浸酸的基本概念进行了介绍,描述了控制系统的基本构成。对浸酸池、控制柜、可编程控制器和上位机组态系统的组成部分和功能进行了详细的介绍。控制系统满足了浸酸的使用要求,达到了预期目标。     

皮蛋加工腌制粉的研究

本研究选用两批共10组配方的皮蛋粉,通过对各组加水搅拌料泥后部分性质的比较,以及选用新鲜完好的鸭蛋为原料,滚蛋、密封保存,通过对其定期抽样检测及皮蛋成品的质量检测,确认第二批第四组配方较为理想,用该粉剂做成的皮蛋成品香、味俱佳,碱Cu、Zn的含量均符合国家标准,是一种方便城乡居民的产品.     

新型多用固体酸洗缓蚀剂

本研究采用腐蚀电化学弱极化测试、曲线拟合技术,测定腐蚀速率等腐蚀电化学参数,并以此方法进行配方筛选试验,最终以失重法进行评定,筛选出了缓蚀效果好、无毒、环保、低添加量的多用固体酸洗缓蚀剂CM-911,该缓蚀剂可用于十六种清洗碳钢、不锈钢、黄铜、紫铜、铝材设备水垢的清洗用酸。     

Influence of surface treatments on fatigue life of Al 7010 alloy

The objective of the present work is to show the influence of machining and anodizing processes on fatigue life of alloy 7010-T7451. Two different cutting conditions were employed to obtain two different initial surface roughnesses. Degreasing, pickling and anodizing were then carried out. In the as machined condition, surface roughness is clearly effective in reducing fatigue life in this material. As the surface roughness increases fatigue life decreases and this effect is found to be more pronounced in high cycle fatigue where major portion of fatigue life is consumed in nucleating the cracks. Effects of pre-treatments, like degreasing and pickling employed prior to anodizing, on fatigue life of the given alloy were also studied. Fatigue curves showed that pickling had negative impact on fatigue life of specimens while degreasing showed no change in fatigue life. The small decrease in fatigue life of anodized specimens as compare to pickled specimens is attributed to brittle nature and micro-cracking of the coating. Scanning electron microscopic (SEM) examination revealed multi-site crack initiation for the pickled and anodized specimens. SEM examination also showed that pickling process attacked the grain boundaries and the inclusions present on the surface resulting in pits formation. These pits are of primary concern with respect to accelerated fatigue crack nucleation and subsequent anodized coating formation.     

风味半干大黄鱼腌制工艺参数研究

为提高养殖大黄鱼腌制品的风味,根据大黄鱼死后的生化变化特性,采用正交实验的方法确定了大黄鱼的腌制工艺参数,并对比了BHA、BHT、TBHQ和异-VC单独及混合使用的抗氧化效果。结果表明:腌制条件为温度(15±2)℃、时间48h、加盐量10%,可使大黄鱼肌肉浸出物总氨基酸含量提高81.4%;在(40±2)℃下热风脱水2h,结合使用0.05%BHA+0.05%BHT+0.2%异-VC的混合抗氧化剂,能有效地防止大黄鱼的脂肪氧化。     

不锈钢件超声波去油酸洗试验

进行了不锈钢6％低浓度硫酸超声波去油和酸洗试验，得出用超声波酸洗比传统去油、酸洗方法的效率提高10倍以上。