冷轧工作辊热处理工艺进展

简要评述了冷轧工作辊的热处理工艺及其随冷轧辊材料发展而发展的趋势，介绍了冷轧工作辊的预备热处理工艺、最终热处理工艺及淬硬层的组织及性能特点。介绍了靠二次硬化获得高硬度的半高速钢冷轧工作辊的热处理工艺特点及由此而产生的性能特点。     

轧工作辊的热处理研究

文章评述了冷轧工作辊的热处理工艺的发展趋势，内容涉及冷轧工作辊的预备热处理工艺、最终热处理工艺及淬硬层对组织及性能影响，同时还介绍了靠二次硬化获得冷轧工作辊的热处理工艺特点及由此而产生的性能特点。     

高性能冷轧辊的研究和选用

冷轧工作辊最常见的损坏是辊面裂纹和剥落，通过提高冷轧辊抗裂性的研究，选用了含Cr3%和5％的轧辊材料，采用强韧化热处理、电渣重溶等加工工艺，大大提高了冷轧辊耐裂纹能力，提高了冷轧辊使用寿命。     

冷轧轧辊毛化技术

介绍了冷轧辊的４种毛化工艺和设备，综合分析对比了各种毛化工艺的优缺点，指出了冷轧毛辊毛化技术的发展趋势。     

国产轴承在冷轧碳钢酸洗平整机支撑辊上的应用

通过对冷轧碳钢酸洗平整机支撑辊用SKF轴承游隙等参数的分析，并结合国内生产制造技术，大胆地对该大型轴承进行了国产化，并成功应用于碳钢酸洗机组平整机支撑辊。     

5％Cr冷轧辊多次调质处理研究

为探索将报废冷轧辊改制成小辊径冷轧辊的工艺可行性,研究了多次调质处理对5％Cr冷轧辊材料性能和组织的影响。试验结果表明,报废冷轧辊经过1次调质或2次调质处理后,组织和性能均达到了冷轧辊的使用要求,但调质处理不能超过2次。     

锻造半高速钢中间辊的研究

介绍了研制锻造半高速钢冷轧辊的工艺特点和性能。通过化学成分的设计，冶炼，锻造，热处理，机械加工等工艺，使锻造半高速钢冷轧辊的实物质量达到了设计要求，于2001年12月在宝钢1420机组上试用考核。     

冷轧辊制造工艺的进展

叙述了冷轧辊用钢的冶炼工艺的发展，锻造冷轧辊、电渣熔铸轧辊、电渣熔铸复合轧辊、铸造轧辊的工艺特点和轧辊质量及热处理工艺——整体淬火和感应淬火对轧辊质量的影响。随着冶炼技术的发展，钢纯洁度的提高，特别是电渣重熔技术的采用，锻造冷轧辊的质量显著提高。由于高铬铸铁、高速钢等轧辊材料的使用和电渣熔铸等技术的发展，铸造轧辊技术得到了快速发展。     

拉伸弯曲矫直机辊端支撑轴承损坏原因分析及对策

介绍新钢1 550 mm冷轧连退机组拉矫机的结构组成。生产中拉矫机经常出现掉辊现象,造成带钢表面划伤缺陷甚至断带停机,出现这一问题的原因是辊端支撑轴承损坏。文章分析了拉矫机工作辊和中间辊辊端支撑轴承损坏的原因,通过优化辊端支撑轴承结构、提高辊系装配质量、完善检修制度,避免了辊端支撑轴承损坏的发生,降低了备件和检修成本,确保了冷轧生产线产量的提高和产品质量的稳定。     

86CrMoV7钢冷轧工作辊的中间修复淬火

一、前言 武钢一米七冷连轧机和单、双平整机是我国生产冷轧薄板及带钢的重要设备,冷轧工作辊的有效层深达75～125毫米,而直径方向的淬硬层深度一般只有30毫米,所以做好冷轧工作辊的中间修复工作,是一项十分紧迫的任务,具有极其重要的经济意义和现实意义。 为了正确制定冷轧工作辊的中间修复淬火工艺,摸清修复工艺对冷轧工作辊质量及使用性能的影响,我们利用引进的双频淬火机、强制循环台车炉和冷处理设备,对130根直径使用掉30毫米的冷轧工作辊进行了一系列修复工艺的试验,初步找出了冷轧工作     

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)     

Comparison of rates of infection of two methods of emergency ventricular drainage

The rates of infection of two methods of external ventricular drainage in use at Atkinson Morley's Hospital--namely, (a) percutaneous drainage with Rickham reservoirs and (b) tunnelled ventriculostomies--were compared in this retrospective review. Percutaneous drainage of CSF with Rickham reservoirs was associated with a 27% rate of infection as identified by positive microbiological cultures; tunnelled ventriculostomy catheters had a 10% infection rate. The difference in the infection rate between the two methods was statistically significant (P < 0.015). Other variables examined, including the age and sex of the patients and the reasons for ventricular drainage, were not associated with an increased rate of infection. Most infections from either method were caused by a coagulase negative staphylococcus. The average duration of ventricular drainage before identification of positive cultures was 5.7 days for Rickham reservoirs and 6.0 days for ventriculostomies.     

浅析《野草》的版画特征

鲁迅先生一生热爱美术作品,对版画中木刻兴趣尤甚.<野草>作为其"写心之作",亦呈现出一些与木刻版画一致的审美特征:一是具有木刻版画的色彩特征,多对比、多冷色,有阴郁的美感;二是具有木刻版画的力度特征,环境描写、人物刻画处处刀锋毕现,遒劲有力,有一种"力之美".     

四辊破碎机车刀架的改造

针对四辊破碎机车刀架车削中存在的几个问题,详细介绍了电动车刀架的结构和工作原理,建立主要设计参数的数学表达式,并进行适当的分析。改造后,这种电动车刀架运行平稳、可靠、方便、省力,取得了预期的效果。     

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。     

Comparison of the results of surgical and conservative treatment of fractures of the diaphysis of the tibia

In this paper is treated the fundamental problematic of the fracture of the diaphysis of the tibia and the therapeutic results after the conservative and operative treatment are confronted. Among 518 patients with 433 open fractures and 35 with closed fractures of the diaphysis of the tibia, successful treatment of more 2/3 was obtained in the period from 1968 to 1972. Following our casuistics and literature, whose results are similar, we find out that the average total treatment of the osteosynthesis of the fracture of the diaphysis was shortened for 2,5 months depending upon the type and the localisation of the fracture. Apolied methods of the operative and conservative and conservative treatment in relation to the velocity of the medical cure as well as to the extreme anatomical-functional results are analised. We noticed that osteosynthesis, made by the intermedullary nail and the extension of the canals or by a small AO table, by the achieved stability makes conditions of immediate motions and an early rehabilitation. Because of that it gives the best functional results.     

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.     

参与式农业基地建设行动方案设计

为了编制实用性强的基地建设行动方案,首先,确定参与式发展的主体,搭建一个"决策框架";其次,针对行动目标,提出不同参与主体,如管理者、农民、消费者等团队与个人的目标及行动内容;最后,工作应向重塑伙伴式合作关系,挖掘农民自我发展潜力,完成三大角色的转换,打造农业基地文化等方向推进.