论文部分内容阅读
伴随着原子动力、空间火箭技术、电子等技术的发展,除了其结构复杂外,还要求采用能在特殊条件下工作的材料如铌、钽、钼、钨超硬合金及特种陶瓷、金属陶瓷等高熔点金属和其他特殊性质的材料,需用量越来越大。为了节省贵重金属,在普通金属材料表面借助特种金属覆面层,来满足特种性能的要求。一般是采用火焰喷涂、等离子喷涂等方法来实现这一工艺。但是由于其设备比较复杂,成品率低,切削余量大,一般情况下还无法实现,因此,上述方法远远满足不了现代科学技术发展的要求。随着激光技术的发展,在国外航天部门首先应用激光作能源简便地完成了燃烧室、喷气尾管等部件表面涂层烧结。所以,很快便由军事工业发展到民用工业。在国内该工艺也引起有关科研人员的广泛重视。现就我们的初步试验结果情况作以粗浅的论述。
Along with the development of technologies such as atomic power, space rocket technology and electronics, in addition to its complicated structure, materials that can work under special conditions such as niobium, tantalum, molybdenum, tungsten cemented carbide, special ceramics, cermets, etc. High melting point metal and other special properties of the material, the amount required for more and more. In order to save precious metals, the surface of common metal materials with special metal coating to meet the special performance requirements. Generally use flame spraying, plasma spraying and other methods to achieve this process. However, due to its complicated equipment, low yield and large cutting allowance, it can not be realized under normal circumstances. Therefore, the above method can not meet the requirements of the development of modern science and technology. With the development of laser technology, the application of laser as the energy source in the overseas space sector has simply completed the sintering of the surface coating of the combustion chamber, the tail pipe and other components. Therefore, soon developed from the military industry to civilian industry. In the country the craft also caused widespread concern of researchers. Now on our initial test results for a brief discussion.