材料表面改性粉末超音速冷喷涂试验研究

【作者】 孙涛；

【导师】 王晓放； 黄钟岳；

【作者基本信息】 大连理工大学 ， 动力机械及工程， 2002， 硕士

【摘要】 粉末超音速冷射喷涂技术(下文中简称冷喷涂技术)是表面工程的一种新兴材料表面改性技术。表面工程以经济、高效、高质量地防护、强化、修复、改善机械零件表面的物理化学性能为研究对象，受到世界各国的重视。 在冷喷涂技术中，被喷涂的的工件以及涂层材料的粉末不需要高温(不足以改变工件和涂层材料的晶相)加热，也就不存在例如像热喷涂中因高温所造成的诸多缺陷，与目前有广泛前途的热喷涂技术相比别具特色，更为引人注目，具有极大的实用价值和广泛的应用前景。 本论文的内容是在涡轮机教研室以前对冷喷涂技术的研究成果基础之上，继续对冷喷涂技术进行进一步深入研究。参考国内外有关的文献和资料，对喷涂中的喷涂粒子侵彻靶板的过程进行了初步的分析；根据进一步对冷喷涂技术原理的深入分析，对原冷喷涂实验装置进行了改进设计并建立了新的实验装置；对此实验装置进行了多种材料的冷喷涂验证实验；并结合教研室承担的科研课题，进行了冷喷涂特殊工艺技术的研究。 但是由于研究还处于探索阶段，冷喷涂装置的研究工作和冷喷涂的机理探索都还有待于深入发展。更多还原

【Abstract】 Cold gas-dynamic supersonic powder spraying method (CSM) is a new method of coating deposition. Materials’ Superficies Modifying, which aims to reinforce materials corrosion-proof, antifriction, strengthening, etc., has been regarded as one of the worldwide new high-technology focuses.The distinguishing feature of CSM is the possibility to produce coatings under the jet temperature of 0-500, which is not high enough to melt particles. Consequently, avoiding the faulty caused by the high temperature used in gas-thermal methods features some important advantages of CSM. Thus the CSM technology has greater practical value and more promising application prospect compared with thermal spraying methods.In this thesis, the CSM is further investigated by experiment method based on the former research results of our research group. Firstly, a primary analysis of process of the particle penetrating the target during the spraying has been performed referring to relevant references and materials. Secondly, the original design CSM experiment device is improved and new experiment devices have been set up according to further analysis of CSM principles. Thirdly, CSM verification experiments of many kinds of materials have been done with respect to the new experiment device. And the research about special CSM craft techniques has been carried out coupled with the project undertaken by our research group.However, the research work regarding the CSM device development and CSM mechanism exploring needed to be further developed since this research work is still at the trial and error stage.更多还原