镍钨“D”镀层及刷镀工艺的研究

1 前言刷镀技术是一种不用镀槽只用镀笔在局部需要电镀的地方进行电镀的技术。所获得的镀层与槽镀层相比,具有更高的硬度,更好的耐磨性,并且使用的设备简单,灵活方便,不受场地限制。该技术不仅适应于零部件的表面强化处理及防蚀处理,更适应于精密零部件的少量恢复尺寸,局部维修,它可使昂贵的报废部件死而复生,能为企业节省     

采用高速蒸发结合等离子工艺的新型薄板涂镀系统

高速蒸发结合等离子体处理是一种发展前景广阔的薄板涂镀新方法，采用这种新方法所得到的薄板镀层具有更高的耐腐蚀性和适用性。为了评估PVD(物理气相沉积)涂镀法的应用前景，用薄板、热浸镀板和电镀板进行了试验。对这些样品进行了大功率等离子体的预处理，然后用沉积速率很高(1μms^-1级)的PVD工艺进行涂镀。研究了成分和微观组织与镀层性能之间的关系，并重点关注了镀层的耐腐蚀性、耐磨性、表面磷化和涂料附着性。结果发现，用气相沉积法给镀锌板涂镀几百纳米厚的金属膜或无机膜，能在相当程度上提高它的耐蚀性。用气相沉积法给耐强腐蚀薄板涂镀钛层或不锈钢层的过程中进行等离子活化处理，能大大提高它的耐腐蚀性。最后，文章还分析了其工业应用的可行性并且评估了投资成本和生产成本。     

电刷镀阳极材料的探讨

电刷镀阳极材料的探讨成青（鞍钢职工工学院）在电刷镀工艺中，工件作为阴极，而常采用石墨为阳极。石墨作为阳极，刷镀一段时间后，刷镀液中的金属离子由于不断地沉积在阴极上（工件上），只消耗没补充，浓度不断减小，而使刷镀液缺乏金属离子，即离子沉积速度明显减慢。...     

电刷镀铬溶液的试制及工艺研究

一、前言在现代电镀工业中,电镀铬基本上都是采用以六价铬离子为主盐的溶液。但这种电镀不仅产生大量的有毒废气和废水,而且在工艺上对施镀温度、电流密度、成分配比等都有非常苛刻的要求。由于六价铬溶液对工件的腐蚀性大,加之,槽镀溶液的金属离子浓度大大低于电刷镀溶液,故不适宜于在电刷镀技术中应用。     

钕铁硼磁性材料表面耐蚀镀层

介绍了Ｎｄ－Ｆｅ－Ｂ磁性材料表面镀Ｎｉ－Ｐ（电镀和化学镀）、镀Ｎｉ－Ｆｅ（脉冲镀和电镀）、镀铬（六价铬和三价铬镀液电镀）的主要工艺条件和镀层的特点。     

无氰镀镉钛工艺研究及应用

本文研究采用氯化铵-氨羧络合物加入钛盐作为镀液,进行多次超高强度钢无氰镀镉钛工艺研究,中性盐雾试验法,缺口拉伸试验法来研究高强度钢无氰电镀镉钛工艺,确定无氰电镀镉钛溶液中各组成成分、电镀工艺参数及槽液控制范围,达到工艺应用要求,并在工业生产中广泛使用。     

脉冲镀与直流镀对镀铁层性能的影响

为研究脉冲镀与直流镀对镀层特性的影响,论文通过对电镀机理的分析和镀铁层特性的比较,总结了脉冲镀较直流镀的优越性;在同一电镀液配比条件下,脉冲镀铁层的沉积状态略优于直流镀铁层,镀层硬度、抗腐蚀性、表面形貌和结晶度均优于直流镀层。     

三价铬电沉积过程强化规律研究

铬镀层具有优异的机械和抗腐蚀性能，传统六价铬电镀存在高毒、高污染等问题，三价铬绿色电镀工艺受到普遍关注，但铬镀层不能持续增厚和镀液稳定性差是关键瓶颈.文中研究了脉冲电流和镀液流动对铬电沉积的影响规律，发现两者均可促进电镀过程中生成的副产物向镀液主体的传递.然而，脉冲电镀会降低铬电沉积效率，镀液流动可以提高铬电沉积效率，并能促进铬镀层的持续增厚.在50 mL/min的镀液流动条件下，直流电镀60 min，可获得41 μm的厚铬镀层，沉积速率为0.68 μm/min，镀层表面平整致密.      

镀层钢板镀前处理工艺的改进

镀层钢板的镀前处理主要有碱洗和酸洗两道工序，它们是整个电镀工艺过程中相当重要的一环，任何不当的工艺条件和操作都影响到后面的电镀作业，造成有缺陷的甚至是不合格的产品．现对中粤马口铁工业有限公司的镀前处理工艺作一简单的介绍，并对该公司的镀前处理工艺提出改进意见．     

化学复合镀及其应用

综述了近年来化学复合镀技术的进展，主要包括耐蚀性化学复合镀和自润滑化学复合镀的制备、特性及应用。化学复合镀层的性能受涂镀条件的影响，复合颗粒不影响镀层的微结构。     

转炉炉壳热应力分析

根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。     

焦炭热性能指标意义浅析

通过对焦炭在高炉内的历程及其变化规律的剖析,阐述焦炭热性能指标的意义,形象地把焦炭在高炉内的损耗分为三部分(M1,M2,M3)。指出M2对焦比及焦炭价格有一定的指导作用。     

Results of treatment of cancer of the cardia

Cancer of the cardia is traditionally discussed with cardiac cancer of the lower portion of the esophagus and upper gastric cancer invading the esophagus, and the specific characteristics of cancer of the cardia have never been clearly defined. We reviewed the outcome of 172 patients with adenocarcinoma of the cardia who had undergone radical surgery between 1949 and 1994 in the Division of Gastrointestinal Surgery of the Cancer Institute Hospital. The centers of the tumors were located within 2 cm above and below the boundary between the esophagus and the stomach, and their longitudinal diameter was less than 8 cm. We divided the patients into an early period (1949-1979; n = 79) and a late period (1980-1994; n = 93), and focused on the historical transition. There were no differences in patient gender or histology between the two periods. However, the late period was associated with fewer cases of esophageal invasion and shorter longitudinal diameter, as the age of the population advanced. The number of advanced cancers such as the localized and infiltrative type had decreased, and early cancer and early clinical stage had become more common, but despite the fact that the number of early cancers had increased, extended dissection, such as thoracic and paraaortic lymph node dissection, was performed more frequently. By clinical stage, the long-term outcome markedly improved in Stage I patient in the late period, and tended to improve in Stage II and III patients. This appears to have been attributable to the prevention of micrometastasis by extended dissection, although the number of early cancers is another major potential cause. There were no differences in the outcome of Stage IV patients between the two periods, and further advances in multimodality therapy must be awaited. The range of resection is basically proximal gastrectomy, and if there are adequate indications, the prognosis is favorable. In view of the status of lymphatic flow and lymph node metastasis, and long-term results, lateroaortic lymph node dissection is important. Since the number of early cancer patients has been increasing, if intraabdominal recurrence is prevented, intrathoracic lymph node dissection will contribute greatly to the outcome of such patients.     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effect of antibiotics of chemotaxis of human leukocytes

The effect of 20 different antibiotics on chemotaxis by human neutrophils was studied. Human leukocytes incubated with chloramphenicol, rifampin, sodium fusidate, and tetracyclines in vitro showed markedly depressed migration. The mechanisms by which these antibiotics affect leukotaxis are discussed.     

Quality of life of relatives of mental patients

Usage of quality of life of psychiatric patients' relatives as the parameter of estimation of the quality of psychiatric care is considered. By means of standard questionnaire elaborated by the authors as well as by means of both individual and group conversations the quality of life was analyzed in 40 relatives which lived together with psychiatric patients. Different spheres of their life and difficulties (financial, social-psychologic, production) were examined in families with such patients. The defects of psychiatric care that had direct influence on the quality of life of the psychiatric patients' relatives are outlined.