文档介绍：华中科技大学
硕士学位论文
基于SHS技术制备陶瓷内衬复合钢管的研究
姓名:严啓志
申请学位级别:硕士
专业:材料加工工程
指导教师:严有为
20090527
华中科技大学硕士学位论文
摘要
陶瓷内衬复合钢管具有优良的耐磨、耐蚀和耐热等性能,在石油、化工、矿山、
冶金等行业具有潜在的应用前景。因此,开展陶瓷内衬复合钢管制备技术的研究,
具有一定的现实意义。
本文以自蔓延高温合成(SHS)技术为基础,分别开展了 SHS-重力法和 SHS-
离心法制备陶瓷内衬复合钢管的研究。在相对简单的 SHS-重力法中,着重研究了铝
热反应体系的 SHS 反应热力学及混合料配比、添加剂等工艺参数对陶瓷层形成及质
量的影响。在 SHS-离心法中,针对三一重工混凝土浆料输送管(φ133mm×1500mm
×3mm),自行设计并制造了一台 SHS-离心机,并进行了复合钢管的试制工作。研
究结果表明:Fe2O3-Al 是较适合复合钢管制备的廉价 SHS 反应体系,在该体系中添
加一种由 SiO2、CaF2 和 CrO3 组成的复合添加剂,可以提高陶瓷层的致密性;陶瓷层
主要由 Al2O3、复合化合物和 Fe 组成,其中,Al2O3 和复合化合物呈枝晶状,Fe 呈
弥散分布的团球状;在陶瓷与钢管的部分结合界面处,发现了较理想的界面过渡层,
该过渡层是一种由 Al、Fe、O、Ca、Si 等元素组成的复合化合物;在 SHS-离心法制
备的复合钢管中,陶瓷层与钢管的结合界面一般均呈简单的机械结合,其结合强度
不高;分析认为,钢管壁薄(3mm)、导热快,致使钢管内壁难以熔化等,是造成陶
瓷层与钢管界面结合不好的主要原因;在复合钢管中,致力获得较理想的中间过渡
层,改善陶瓷层与钢管的界面结合,是利用 SHS-离心法制备小口径、薄壁复合钢管
下一步研究的重点方向。

关键词:自蔓延高温合成;陶瓷;复合钢管;组织结构;致密性

I
华中科技大学硕士学位论文
Abstract
The ceramic-posite steel pipe has great potential in the application of
petrochemical, mining and metallurgy industry due to its excellent performance in the
resistance of wear, heat and corrosion. Hence, it’s necessary to do some research on the
fabrication of this promising product.
In this paper, ceramic-posite steel pipes were respectively prepared by the
SHS Gravitational-thermite Process and SHS-Centrifuging, both of which are on the basis
of Self-propagating High-temperature Synthesis (SHS). Referring to the former method,
the reaction thermodynamics of thermite, the mixture ratio of each ingredient and additive
in whole bined with other factors which have great impacts on the quality of
the inner ceramic coating were mainly discussed. Regarding the latter technique, a SHS
Centrifuge was self-designed and manufactured according to the requirement of concrete
slurry pipeline produced by SANY Corporation. It turns out that Fe2O3-Al is a suitable and
inexpensive system for the SHS reaction. In addition, pound prises
SiO2, CaF2 and CrO3 will enhance pactness of coa