Na2B4O7对离心SHS陶瓷内衬复合钢管压剪强度的影响

研究了Ｎａ２Ｂ４Ｏ７添加剂对Ｆｅ２Ｏ３＋Ａｌ体系离心ＳＨＳ陶瓷内衬钢管剪强度的影响,结果表明,添加Ｎａ２Ｂ４Ｏ７后,Ａｌ２Ｏ３和Ｆｅ两相之间的界面张力降低,导致Ａｌ２Ｏ３和Ｆｅ两相在离心力作用下分离不彻底和润湿性改善,结果陶瓷衬管的压剪强度显著提高。     

预热对制备SHS陶瓷内衬钢管的影响

采用重力分离ＳＨＳ法制备陶瓷内衬钢管，研究了预热温度对ＳＨＳ反应过程中内衬管质量的影响。实验发现，粉末和管才预热都有助于ＳＨＳ反应和提高复合管质量。粉末预热温度过低，内衬管表面不光滑且存在大量气孔，复合管力学性能低；粉末预热温度过高，添加剂ＣｒＯ３提前分解，ＳＨＳ反应变慢，反应进行到最后阶段多余铁水和陶瓷不能从和内流出，使管头堵塞或内径变细，甚至造成废品。在本实验条件下，粉末烘干温度为１２０℃，烘     

1067mm大型汽流粉碎机备件的国产化

为解决陶瓷侧壁衬、陶瓷上下板衬和陶瓷文丘里管先后损坏问题．侧壁衬改成30铸钢与DXRE耐磨焊条堆焊结构；上下衬板改为由普通碳素钢板与合金钢板用螺栓连接，并在钢板之间充填乐秦596粘结剂；文丘里管材质改为20号渗碳淬火钢，均取得了满意的效果。     

铝热SHS—离心技术的技术的研究与发展

评述了铝热ＳＨＳ－离心技术的最新研究进展，并就研究了现状与发展提出了一些看法和建议。     

稀土对SHS陶瓷涂层影响的研究

本文研究了稀土对两种组成的ＳＨＳ（Ｓｅｌｆ－ｐｒｏｐａｇａｔｉｎｇＨｉｇｈＴｅｍｐｅｒａｔｕｒｅＳｙｎｔｈｅｓｉｓ）陶瓷涂层的影响。试验得出稀土可改善正常配比陶瓷涂层的组织形态，减少涂层孔隙，提高金属—陶瓷涂层复合管的力学性能和抗热冲击性；相反，对含ＳｉＯ２组成的涂层组织形态和相应复合管力学性能产生不利影响     

铝热SHS—离心技术的研究与发展

评述了铝热ＳＨＳ—离心技术的最新研究进展,并就研究现状与发展提出了一些看法和建议。     

加砷及加硼HSn70—1管抗污性和耐蚀性的研究

总结了ＨＳｎ７０－１和ＨＳｎ７０－１管在海南榆林海洋试验站全浸半年及１年后的抗污和耐性能。ＨＳｎ７０－１管在加砷的同时加入微量硼，改变了“氧化铜膜的缺陷结构”，硼还能填充到晶界和双空位处，阻碍了锌沿晶界和双空位迁移。从而使铜合金的抗污和耐性能是到显著增强。     

离心SHS法钢管涂敷陶瓷层致密化机制的探讨

研究了在离心力场的作用下，采用自蔓延高温合成法（ＳＨＳ）在钢管内壁涂敷氧化物陶瓷层的致密化机制。研究结果表明，随着离心力的增加，陶恣层及过渡层的致密化情况得到明显改善。离心力的数值的变化是影响陶瓷涂层致密化的重要参数。     

制备陶瓷内衬复合钢管的SHS离心机

通过ＪＳ－１型ＳＨＳ离心机的研制，介绍了该机的组成与结构特点，简述了在设计制造中的几个主要问题。实践证明，该机可成功地制备内径为５０￣２００ｍｍ，长度在１００￣２０００ｍｍ之间的中小型的陶瓷内衬复合钢管。     

衬钽石墨炉原子吸收法对微量稀土的测定研究

研究了在石墨管中衬钽石金属的方法并用于原子吸收分析ＧＳＤ化探标准样，结果表明该法测定微量稀土灵敏高、结果准确，钽片使用寿命长。     

油层套管射孔性能的材料判据研究

介绍了油层套管经受射孔操作的过程，射孔对套管的要求，检评套管射孔性能的传统实验方法。提出了用材料性能检评油层套管射孔性能的方法和判据。     

热处理线淬火及回火炉改烧天然气工艺研究

文章通过对包钢无缝厂Φ180 mm机组热处理工艺改造进行研究,研究结果表明:通过热处理炉天然气改造,使加热炉加热钢管温度均匀、稳定,从而提高钢管一次性能合格率和一级品率;同时,在保证钢管性能满足技术要求的前提下,缩短生产时间,降低生产成本。     

4Y32-T6铝合金管材生产工艺研究

介绍了4Y32铝合金特性,结合试制生产情况阐述了4Y32-T6铝合金管材熔铸工艺、均匀化退火工艺、挤压工艺、热处理工艺制度等,为工业化生产4Y32-T6管材提供了依据。     

Analysis of the quick corrosion of blast furnaces’gas pipes after the installation of dry-type de-dusting equipment and discussion about measures

Compared with the traditional wet-type de-dusting technology,the dry-type de-dusting technology is considered to be environmentally friendly and energy-saving.However,the pipes carrying the de-dusted blast furnace gas (BFG) tends to be corrosive more quickly and seriously.In order to investigate the reasons for the quick corrosion,the gas pipes and auxiliary bellows installed in Baosteel’s newly built BFG dry-type de-dusting system are studied.The corrosive properties of the condensed water,such as the pH value,are measured and analyzed.Meanwhile,various factors that may influence the corrosion rate of the pipes are studied by experiment.On the basis of the investigation and research,the causes of corrosion and leakage on the pipes are discovered.It is the process of dry de-dusting that is responsible,to a large extent,for the quick corrosion of the pipes.The equipment of spray tower is introduced and its effects are then discussed.This tower is designed to eliminate most of chloridion and neutralized the acid by spraying the alkaline water to the de-dusted gas flow.The practical operation shows that the tower helps to lessen the corrosiveness of the dry de-dusted gas effectively.The last part of this study analyzes the possible impacts of the dry-type de-dusting process of the newly built blast furnace (BF) on the main BFG piping which has been in the state of being corroded for years by estimating its potential corrosion rate,and some suggestions on maintenance are given as well.     

离心自蔓延高温合成陶瓷内衬复合钢管的研究与应用

应用自蔓延高温合成技术和离心技术，制造了陶瓷内衬复合钢管，并分析了其制造原理，测试了其性能，复合钢管陶瓷层硬度高、耐磨性好，但孔隙率高，韧性低。在铝热剂中加入SiO2，可提高致密度，改善耐蚀性，加入ZrO2可提高断裂韧性。它应用于矿山输送矿浆管道上，使用效果很好。     

关于穿孔机组壁厚工艺控制的探讨

穿孔机是轧管工艺的重要生产工序,其工艺控制决定着钢管最终的质量。文章通过对穿孔机轧制工艺如何科学合理地进行调整做了全面的分析,提出了解决问题的方法,为降低钢管壁厚不均缺陷,提升钢管质量提供了参考。     

无缝钢管水淬火设备的设计及应用

介绍一种集液压、机械、电气、计算机控制于一体的新型无缝钢管用水淬火设备,该设备在研发设计过程中,采用了国内外先进的"外淋+旋转+内喷"淬火工艺,并进行了许多的技术革新。通过对该水淬火设备工作原理、淬火工艺、结构特点的分析,说明了该设备与国内其他水淬火设备在机械结构、淬火效果、淬后钢管精度、机械性能等方面的不同。     

20G高压锅炉管压扁开裂原因分析

20G厚壁高压锅炉管在按标准要求进行压扁检测时出现批量开裂现象,对其断口形貌、化学成分、力学性能、显微组织等进行检测,结果表明开裂是由于热处理工艺不当,铁素体没有完全奥氏体化所致,对此类厚壁高压锅炉管提出了相关切实可行的热处理工艺措施。     

Automatic girth welding and performance evaluation of the joints of hot-induction-bend and line pipes with different wall thickness

During the process of laying long-distance oil and gas transmission pipelines,the hot-induction-bend method is extensively used when the direction has to be changed.By considering the pipeline's ongoing processing and loading states during service,the pipeline that is generally used exhibits thicker walls than those that are observed in the line pipe.As such,during pipeline construction,hot-induction-bend and line pipes with different wall thickness are girth-welded.The chemical composition of hot-induction-bend and line pipes differs,with the carbon content being particularly higher in the hot-induction-bend pipe;it also depicts a higher carbon equivalent,which makes it possible to modify the girth of the pipe.In this study,using Baosteel's standard X70M UOE hotinduction-bend and line pipes,solid-wire automatic gas-metal-arc girth welding was performed and the performance of the girth-welded joint was evaluated.Furthermore,the weldability of the pipeline girth and the microstructure of the girth-welded joint were analyzed.The results reveal that Baosteel's standard UOE hot-induction-bend and line pipes exhibit good girth weldability,and their technical quality can be guaranteed in case of consumer fieldconstruction applications.     

1Cr5Mo合金钢管热处理工艺研究

文章通过实验室实验,对1Cr5Mo合金钢管在不同热处理制度下性能进行了研究,选择最佳热处理制度应用于工厂规模化生产。从实验室研究结果可以得出1Cr5Mo合金钢管优化的热处理工艺为:退火温度880~920℃,保温2.0 h,按上述优化工艺获得钢管各项性能均满足标准和用户的使用要求。