What kind of heat treatment? Is it a post weld heat treatment?Pattonias said:I am working on a heat treatment plan, and I am curious if there is a go-to source for ttt diagrams for particular materials. I am working with SA-516 70, but it would be nice if there was one place where I could go to get current/reliable information. So far google searches have been unsuccessful.
A steel ttt (time-temperature-transformation) diagram is a plot that shows the relationship between time, temperature, and the transformation of different phases of steel. It is important because it helps engineers and scientists understand the microstructure and properties of steel at different temperatures and times, which is crucial for designing and manufacturing steel products.
A steel ttt diagram is created by heating a sample of steel to a specific temperature and holding it at that temperature for a designated amount of time, then rapidly cooling it. The resulting microstructure is then examined under a microscope and plotted on a graph with temperature on the x-axis and time on the y-axis.
A steel ttt diagram provides information about the phases present in steel at different temperatures and times, as well as the rate of transformation between these phases. It can also give insight into the hardenability, strength, and toughness of steel.
The composition of steel, especially the amount of carbon and other alloying elements, can greatly impact its ttt diagram. Higher carbon content, for example, can lead to a faster transformation from austenite to martensite, resulting in a harder and more brittle steel.
In industry, a steel ttt diagram is used to guide the heat treatment process for steel. By understanding the transformation behavior of different steel compositions, engineers can design heat treatment processes to achieve specific microstructures and properties in the final product. This is essential for producing high-quality and reliable steel products for various applications, such as construction, automotive, and aerospace industries.