管坯钢缺陷的成因分析

本文采用金相分析方法，通过对管坯钢典型缺陷实例的分析，研究了管坯钢缺陷的成因，从而为消除缺陷，提高管坯钢及钢管的生产质量提供了科学依据。     

碳素管坯钢钢坯表面裂纹成因探讨与生产工艺控制

本文通过对碳素管坯钢（管２０）钢种特点的分析，探讨了管坯钢钢坯有面裂纹的成因，分析总结了太钢平炉，转炉管坯钢生产工艺控制及初轧翻钢道次与钢坯有面裂纹的关系。     

碳素管坯钢裂纹的统计分析

裂纺缺陷是碳素管坯钢的主要缺陷特征，多年来严重影响着碳素管坯钢的成材。本应用现代化数理统计手段对造成该钢种裂纹废品的操作参数进行了回归处理，找到了造成管坯钢裂纹主要影响因素。     

管坯钢夹杂物成因分析及工艺控制

针对管坯钢非金属夹杂物的形态、组成及形成原因进行了分析，据此采取了相应的工艺控制措施，使管坯钢的冶金纯净度得到了很大提高。     

转炉加LF精炼生产优质碳素管坯钢

介绍了应用转炉加LF精炼生产合格的优质碳素管坯钢的情况.转炉管坯钢的纯净度同Q235A普碳钢相比显著提高,接近电炉管坯钢的水平.但要进一步提高转炉管坯钢的质量,还需提高转炉出钢过程的挡渣效果,保证足够的LF精炼处理时间.现研制的优质碳素管坯钢可满足用户的使用要求.     

S30432钢连铸和模铸管坯的高温加工性能对比

利用Gleeble热模拟试验机，完成了同炉冶炼的S30432钢连铸和模铸工艺生产的管坯在高温下的拉伸热变形过程，设置了1 000、1 050、1 100、1 150℃系列温度和0.1、1、5 s^-1应变速率的不同热模拟试验条件，获得了同炉冶炼的S30432钢连铸和模铸工艺生产的管坯在各个高温拉伸条件下的高温应力-应变曲线，并对其进行修正和拟合，使其尽可能符合实际试验情况。对同炉冶炼的S30432钢连铸管坯和模铸管坯的热变形本构方程进行了拟合，并对2种工艺管坯的高温热塑性差异进行对比分析。结果表明，连铸管坯和模铸管坯的热塑性在不同拉伸温度和速率下表现出一定规律性，连铸管坯的热塑性存在较大的波动，且整体上略逊于模铸管坯，为改进优化管坯的穿孔工艺提供了参考。通过扫描电镜对高温拉伸断口的微观组织结构进行表征，发现高温拉伸失效形式为塑性断裂，绝大部分断口形貌属于韧窝断口。然而，在特定条件下，部分连铸管坯试样表现出较差的热塑性，其断裂形式转变为脆性断裂。对于S30432钢连铸管坯的高温塑性加工，建议使用较高的应变速率和较高的应变温度以获得良好的加工性能。     

6t转炉管坯钢试验与生产实践

６ｔ氧气顶吹转炉管坯钢试验及生产中，应用钢包脱硫、喂线以及底吹氩技术改善了钢质量， 管坯报废率邮远缝管正品率，成材率及机械性能合格率，具有较显著的经济效益。     

关于管坯钢裂纹研究的进展

综述了管坯钢表面裂纹研究的进展,分析了影响管坯钢表面裂纹的主要因素。     

Φ80mm～110mm0Cr18Ni12Mo2Ti管坯钢的试制

介绍不锈管坯钢０Ｃｒ１８Ｎｉ１２Ｍｏ２Ｔｉ的冶炼和加工工艺并作了分析探讨。检验分析了该钢的化学成份，显微组织和夹杂物等，结果表明，太钢生产的不锈管坯钢０Ｃｒ１８Ｎｉ１２Ｍｏ２Ｔｉ完全能够达到技术条件的要求，说明现行的生产工艺是可行的。     

以铁水为主原料生产管坯T91钢的试制

介绍了以铁水为主原料采用"转炉+VOD+LF+方坯+热轧"生产管坯T91钢的生产工艺。通过工艺控制,转炉冶炼生产的T91钢纯净度高,残余元素含量低,完全满足管坯用钢要求。管坯轧后质量与模铸产品相当,可以替代长流程工艺生产的同质量水平的管坯。     

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.