共查询到20条相似文献,搜索用时 0 毫秒
1.
中高碳钢盘条拉拔前的磷化处理 总被引:2,自引:0,他引:2
介绍了磷化膜成膜机理,磷化液的种类和应用,从磷化温度、磷化液酸比、磷化时间、盘条中的碳含量、促进剂的选择、盘条表面处理等方面介绍了影响磷化质量的主要因素,并提出了适合实际生产的磷化生产工艺流程和磷化液配方。 相似文献
2.
3.
铝盐磷化液中铝离子的测定张健(中南民族学院化学系武汉,430073)以铝盐为主剂的磷化液,其铝盐的浓度有一最佳范围,铝盐含量过高和过低时,其磁化性能有较大影响,因此为控制磷化液组份和磷化工艺条件,建立磷化液中铝离子含量的分析方法是必要的。磷化过程中,... 相似文献
4.
5.
6.
本文介绍了EGH-钢磷化剂的技术参数、磷化原理,并结合生产实际确定了使用中的最佳参数值及稳定磷化液的措施,对促进冷拔无缝钢管产量和质量的提高有参考价值。 相似文献
7.
8.
9.
本文对磷化机理进行了讨论,提出用硝酸锌代替硝酸、氧化锌配制磷化液。通过实验室试验、工业试验和现场推广,在该厂取得了一定的效果。 相似文献
10.
本文采用测试极化曲线的方法,通过对比极化曲线上电流和电位的几个特征值,定性地研究经过FX-2型“四合一”磷化液处理,经不同干燥时间的钢铁试样耐工业大气腐蚀的性能,并对晶态磷化和非晶态磷化试样的耐蚀性进行比较。 相似文献
11.
铜镍合金冷凝管产品市场分析 总被引:1,自引:0,他引:1
铜镍合金冷凝管主要用于电力、石油化工、造船、海水淡化和海洋工程等行业。铜镍合金冷凝管在舰船、海洋工程、海水淡化行业具有不可替代性,不锈钢管和钛管无法替代铜镍合金冷凝管在这些领域的应用。在火力发电行业,不锈钢管具有与汽轮机几乎等同使用寿命的优点,具有替代铜镍合金冷凝管的趋势。不锈钢管用于冷凝器的主要缺点是导热性能低,随着社会对提高设备节能性能的要求越来越高,铜镍合金冷凝管的优势越来越显现。 相似文献
12.
13.
14.
15.
《钢铁研究学报(英文版)》2011,(Z1):696-700
The relationship between microstructures and mechanical properties of a medium carbon V-N microalloyed steel used for N80 seamless oil-well tubes of hot rolling non-quenched/tempered (non-Q and T) was investigated.The results have shown that volume percentages of upper bainite,modified bainite and ferrite have a decisive influence on impact energies of steel tubes.When the total volume percentage of bainite is larger than 5%,the impact energy of tubes can not satisfy with the industrial criteria.Moreover,if the total volume percentage of bainite is smaller than 5%,then the impact energy of steel tubes enhances with volume percentage of ferrite increasing.The final microstructures have closely relation with tube billet quality,controlled cooling temperature after tube rolling and cooling method after stretch-reduction-diameter.High quality of medium carbon V-N microalloyed steel for non-Q and T oil-well tubes can be produced through comprehensive control of microstructures and mechanical properties in sub-procedures,especially for tube billet quality and controlled cooling parameters. 相似文献
16.
17.
针对现有普通链式拉拔设备条件下生产冷拔精密无缝钢管的工艺流程,分析了在该流程条件下的生产控制工艺,包括模具设计、退火、酸洗、润滑条件等控制要求,同时分析了该流程存在的热轧毛管供给困难、退火设施落后、拔制质量不稳定、生产成本高、环保压力大等诸多问题,指出了冷拔精密无缝钢管工艺控制的局限性。 相似文献
18.
M. Preethi B. S. Murty S. Ganesh Sundara Raman R. Natarajan 《Transactions of the Indian Institute of Metals》2014,67(5):681-690
The present study is made to develop ultra fine grained microstructure in welded steel tubes, through multiple cold drawing passes followed by an annealing treatment. The average ferrite grain size is reduced from 16 to 1.9 μm. SAE 1019M steel grade used for a typical automotive driveline component is studied. Strains between 0.3 and 1.4 followed by annealing at 400, 450 and 500 °C are considered to optimize the combination of cold drawing strain and temperature required to produce ultra fine grained microstructure in steel tubes. At a strain value of 1.4 and annealing temperature, 500 °C, polygonal ferrite grains and fine carbide particles are obtained. This microstructure is found to be suitable owing to its combination of high strength and good ductility in steel tubes. Tensile strength as high as 1,061 MPa and 9 % elongation is obtained due to microstructural refinement. The strength is increased by 350 MPa compared to the strength of conventional cold-drawn welded tubes. 相似文献
19.
20.
介绍了攀钢集团成都钢铁有限责任公司石油化工专用碳钢管系列的产品开发和生产工艺。产品质量检测结果表明,钢管的各项性能指标均达到技术协议和相应产品标准的规定,能够满足石油化工装置对专用碳钢管的特殊要求。 相似文献