高利信息

高强度高韧性输送管线钢及其制备方法 本发明尤其适用于大管径、高压、高密度的油、气长距离输送用高强度高韧性管线钢及其生产方法。其解决目前生产材质厚度只有8mm,输送高压、高密度介质其强度和壁厚明显不足,管道易造成断裂,延伸率较低,加工成型性差等不足。     

超高强度管线钢的开发现状与趋势

为满足长距离输送管道经济效率的考虑,管线钢朝着超高强度方向发展。本文从超高强度管线钢的性能要求、成分设计、强化机理和韧性提高等几个方面阐述了超高强度管线钢的研究与开发现状。围绕高强、高韧与焊接性的优良匹配,讨论了超高强度管线钢的技术难点,简述了超高强管线钢的生产工艺和焊接工艺的发展趋势。     

低温韧性优良的管线用X80电焊钢管开发

由于近年提高了对能源输送的需要，即使是在电焊钢管中，为了满足对高强度高韧性管线输送用钢管的需求，已经实现了X80级高韧性电焊钢管的商品化。开发钢管组织中不含粗大的珠光体（简称P）和马氏体（简称M）、而具有均匀的贝氏体·铁素体（简称B·F）组织。另外，将c（碳）含量降至0．03％的低Ceq（c当量）成分钢缝焊部韧性优良，特别是不仅母材，而且即使焊接部位的vTrs（夏比断口转变温度）也低到了50℃以下，从而使X80级电焊钢管韧性优良，能满足多方向管线钢的用途要求。     

天然气输送管件三通用X90钢板的开发

在中石油计划建设西气东输三线X90/X100管线钢试验段背景下,舞钢成功开发天然气输送管件三通用X90钢板,钢板由中油管道局机械制造厂制作成三通并经西安管材所检验,各项性能指标均符合X90管线钢三通的要求。     

炉卷轧机生产X70管线钢

介绍了安阳钢铁股份有限公司采用150 t转炉、连铸、炉卷轧机生产线生产高强度高韧性X70管线钢的情况,包括成分体系设计和轧制工艺。通过合理运用微合金化技术和炉卷卷取轧制工艺开发的管线钢,机械性能优良,合格率达99.3%,满足长距离油气输送管道要求。     

X100管线钢开发实践

根据高强度管线钢发展趋势,参考API SPEC 5L-2007《管线钢管规范》和中国石油天然气集团公司《天然气输送管道X100钢级螺旋缝埋弧焊管用热轧板卷技术条件》要求,邯钢公司制定了X100管线钢热轧卷板生产试制的技术要求。通过化学成分、冶炼、控轧控冷工艺设计,邯钢公司试制生产的X100管线钢在2250热连轧生产线热轧卷板具有较高的强度和良好的低温韧性,金相组织检验为"板条贝氏体+粒状贝氏体"组织,产品的各项力学性能达到了设计要求。     

太钢研制成功X120管线钢卷板

日前,世界上等级最高的X120管线钢卷板在太钢2250热轧生产线试制成功,太钢成为全球首家实现X120管线钢卷板试生产的企业,也是太钢管线钢技术继X80管线钢之后的又一次重大突破。管线钢主要应用于石油、天然气输送管道的制造,由于天然气田大多集中在荒漠、极地冻土带等边远地区,对管线钢的可靠性和经济性要求极高,     

宝钢增强热轧合金板带精品研制能力

宝钢成功生产出10．3mm、11．1mm两种规格的超薄、抗氢致裂纹、抗硫化氢“双抗”管线钢,该管线钢产品将用于制造青岛黄岛至潍坊重质液体化工原料输送管道工程中的直缝焊管。宝钢虽然有着多年生产管线钢的历史,但生产超薄规格“双抗”管线钢尚属首次。黄岛至潍坊重质液体化工原料输送管道工程的可行性研究报告、项目建设报告批复后,     

济钢X100～X120管线钢试制成功

近日．济钢X100-X120管线钢在中厚板轧机进行了首次试制，试制钢板的主要技术指标已经达到超高强度X120管线钢的要求，标志着济钢在管线钢研发生产方面取得突破性进展。     

管线钢的发展趋势及生产工艺评述

对超纯净管线钢、高强度高韧性管线钢、易焊管线钢和高抗腐蚀管线钢的发展趋势进行了论述，分别介绍了宝钢、武钢、鞍钢管线钢的生产工艺、技术开发、化学成分和力学性能，认为中国应研制开发在酸性环境下使用的管线钢和X70高强度高韧性管线钢，并为X80高钢级管线钢的前期研究工作做技术准备。     

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.     

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.     

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)