High temperature materials.pptx

High temperature materials（HTM） Contents What is High Temperature Brief History of HTM Division The classification of high temperature alloy Apply of HTM Domestic development MY research What is High Temperature A definition of high temperature can be confusing. One often used definition in materials science and technology is that it is a temperature equal to about two-thirds of the melting point of a solid. Another definition, attributed to Leo Brewer, is that high temperatures are those at which extrapolations of a material’s properties, kinetics, and chemical behavior from near ambient temperatures are no longer valid. Brief History of HTM Division The roots of the High Temperature Materials Division can be traced back to 1921 when it was founded as the Electrothermics Division, the first formalized Division of The Electrochemical Society. Since the late 1930 s, Britain, Germany, the United States and other countries began to study high temperature alloy. During the second world war, in order to meet the needs of the new type of aircraft engine, high temperature alloy research and use of the enters a period of vigorous development. The classification of high temperature alloy Apply of HTM Apply of HTM 、 Charging turbine Domestic development In the past half century, China has developed and formed her own system of high temperature materials for power, aviation, transportation in the temperature range from 550℃ to 1100℃ High temperature materials general relatively backward in our country MY research High temperature iron base alloy many elements such as chromium and nickel and so on. It is high temperature (1000 ~ 1200 ℃) under the conditions of use of important materials, has a check in the temperature mechanical properties and good thermal plastic, alloy composition is simple, the cost is low. And the alloy have high temperature wear-resistant. Thank you