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叙述了245 mm厚度Q345RZ35特厚压力容器用钢板的研制开发过程。成分设计采用添加Nb、Cr元素,通过成分设计、轧制及热处理工艺,试制成功245 mm特厚Q345RZ35高强度压力容器钢板。结果表明:钢板的常规力学性能及抗层状撕裂性能均满足国家标准要求,钢板内部探伤达JB/T2970-2004II级标准。 相似文献
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简述了南钢炉卷轧机生产Q370qD桥梁用钢板的工艺过程。实物质量表明,Q370qD桥梁用钢板的化学成分、机械性能均符合技术标准要求。通过Q370qD桥梁用钢板的轧制,为其它含Nb微合金化钢板的炉卷轧机生产工艺积累了一定经验。 相似文献
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Q345qD桥梁用结构钢板的开发与生产 总被引:1,自引:0,他引:1
采用结晶器喂铝丝工艺,充分发挥各工艺设备能力,严格控制轧制工艺制度,在原有的20t小转炉和装备水平较低的中板厂生产线上生产出批量的高附加值品种板-Q345qD桥梁用结构钢板,满足了市场需求,优化了中板的品种结构。 相似文献
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济钢桥梁用Q345qD钢板的生产工艺研究 总被引:2,自引:0,他引:2
宋长荣 《金属材料与冶金工程》2009,37(3):8-11,30
针对Q345qD生产工艺现状,提出了桥梁用Q345qD的工艺控制方案,设计了化学成分,制定了再结晶型控轧+中间坯水冷与等温冷却+未再结晶控制工艺。同时分析了取样温度对冲击性能的影响.形成了关键工艺参数与时效冲击性能的回归方程,对所生产的钢板进行了机械性能、金相组织的全面分析,满足了用户的需求,提高了桥梁板生产能力。 相似文献
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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。 相似文献
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K Ohta M Nishi M Ueda S Ohyama T Matsubara T Takahashi T Nakajima 《Canadian Metallurgical Quarterly》1998,99(9):589-594
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. 相似文献
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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) 相似文献
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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. 相似文献
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TA Solokhina LS Shevchenko IuV Se?ku EG Rytik LV Besedina TS Veshchugina 《Canadian Metallurgical Quarterly》1998,98(6):42-46
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. 相似文献
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