冷轧带钢退火粘结缺陷原因分析及控制措施

针对冷轧带钢罩式退火后产生粘结而降低成材率的问题,分析了冷轧带钢罩式退火后产生粘结的原因,通过采取优化轧机成品卷取张力、提高末架轧机工作辊粗糙度、优化退火及平整工艺等措施,有效降低了冷轧带钢的退火粘结缺陷率。     

不锈钢带钢轧制退火酸洗线的最新进展

到目前为止，世界上绝大多数冷轧不锈钢带钢生产厂一直沿用具有不同功能的、各自独立的作业线来生产冷轧不锈钢带钢，比如，热轧带钢退火酸洗线、冷轧机组、冷轧带钢退火酸洗线或光亮退火线、平整机组、纵横切机组等。近几年来，一些冷轧不锈钢带钢生产厂为了满足市场大     

冷轧带钢平整时横折印缺陷的产生机理及消除措施

冷轧退火后的带钢在平整过程中产生横折印缺陷,严重影响平整后带钢的表面质量及其力学性能.通过分析带钢经过张力辊(S辊)时的受力过程,研究横折印缺陷的产生机理和影响因素,认为退火后的屈服平台和平整机入口前的带钢表面拉应力过大是带钢表面产生横折印缺陷的根本原因.制定合理的伸长率和张力制度,严格来料质量要求,可以避免横折印缺陷的产生,提高平整带钢的表面质量.     

全氢罩式炉退火带钢粘结原因分析

对冷轧带钢在罩式炉退火过程中带卷产生局部粘结的原因进行了分析。指出在退火过程中,铁、氧化铁的相互转化是产生粘结的主要原因,并提出改进措施。     

冷轧带钢退火粘结缺陷的研究

对冷轧带钢在罩式炉中退火产生粘结缺陷的机理进行了研究，指出带卷径向存在温度梯度，在冷却初始阶段冷缩变形不均匀是产生粘结的主要原因，同时定性分析了影响粘结倾向的各种因素，并提出应对措施。     

攀钢冷轧厂重卷机组活套辊印分析

攀钢冷轧厂新投建了一条重卷机组,带钢在机组的活套处产生了明显的辊印缺陷,该缺陷在带钢上下表面都有,集中于带钢的操作侧及中部。其产生原因是辊子加工过程中产生的点状局部凸起,以及辊子安装不水平。通过对辊子的安装位置调整,及辊面进行打磨处理,有效地控制了辊印的产生。     

冷轧钢卷退火过程中的粘结问题

本文针对冷轧带钢在退火过程中出现粘结这一表面缺陷，分析了粘结形成的机理、影响粘结的因素，并提出了相应控制措施。     

冷轧精整线带钢卷筒折印分析及对策

介绍了冷轧带钢精整线卷筒折印的表现特征,结合某厂带钢表面质量攻关实践,从卷取设备的结构、精度及卷取工艺等方面,详细分析了卷筒折印产生原因,并提出解决方案。重点研究了机组卷取张力对卷筒折印的影响作用,通过在线测试,优化卷取设备张力模型,达到带钢生产顺利进行的同时,最大限度减轻卷筒折印的目的。     

冷轧带钢退火粘结分析与处理

分析冷轧带钢退火粘结的原因,通过优化退火工艺、控制板形、提高表面粗糙度和控制卷取张力,将粘结率由1.13%降低到0.3%以下。     

SUS304不锈钢冷轧硬态板型质量对活套跑偏的影响分析

不锈钢冷轧硬态带钢在连续退火机组入口活套内经常出现跑偏现象,造成机组异常停机、带钢实物和设备受损,对冷轧带钢产量和质量均造成不良影响.本文介绍了二十辊森吉米尔轧机性能和结构以及板型控制和调整方式,研究了冷轧硬态板在连续退火机组出入口活套工段跑偏的原因和影响因素,并制定解决方案和改进措施.研究表明,冷轧硬态基础板型质量是...     

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.