高温合金科技英语.ppt

High-temperature alloy,CLASS: NAME:,2019年9月6日,本科毕业设计答辩,Contents,The definition and development of high-temperature alloy Characteristics and Classification of high-temperature alloy The performance requirements of high-temperature alloy Ways of improving the performance of high-temperature alloy Application and Future of high-temperature alloy,The definition and development of high-temperature alloy,High-temperature alloy is a kind of metal material which can work normally under the high temperature of 6001200. For this reason , we also call it superalloy. With the development of the aviation industry and the mechanical processing industry , we need some materials that can work normally under the high temperature , so high-temperature alloy appeared and developed rapidly since about eighty years ago . Now it has a large number of species and can meet various requirements in the industry. In the future, we believe high-temperature alloy will have better development and brighter prospect.,Characteristics and Classification of high-temperature alloy,The performance requirements of high-temperature alloy,The mechanical properties at high temperatures Endurance strength Thermal fatigue Relaxation Creep 2. Corrosion resistance at high temperatures It includes antioxidation , anti-sulfidation , anti-nitriding , anti-carbonation , corrosion resistance and so on .,Ways of improving the performance of high-temperature alloy,Structure strengthening solid solution strengthening precipitation strengthening grain boundary strengthening 2. Process intensification powder metallurgy directional solidification rapid solidification,Application and Future of high-temperature alloy,High-temperature alloy is widely used in engine , for example , aircraft engine , rocket engine , and gas turbine engine . It is also used in other fields , nuclear industry , metallurgical industry , petrochemical , coal gasification and so on .So superalloy is very important for the heavy industry and industrial upgrading . In the future , to develop new superalloy and breakthrough the re