Schaeffler Constitution Diagram
The Schaeffler structure diagram shows the microstructure of austenitic and dissimilar welded joints using chromium and nickel equivalents. It helps avoid hard martensite or phases that promote hot cracking.
Physical-Chemical Mechanism of Action
The Schaeffler structure diagram uses chromium and nickel equivalents to predict the microstructure of austenitic and dissimilar weld joints. It shows whether the microstructure becomes austenitic or martensitic, depending on the filler materials.
Metallurgical Relevance & Risks in Welding
A wrong microstructure can lead to hard martensite, which increases hardness and promotes cracking. The diagram prevents these problems through correct filler materials.
Workshop Practice & Action Instructions
Use the Schaeffler structure diagram to determine chromium and nickel equivalents. Adjust the filler materials accordingly to achieve the desired microstructure. For example: For a high-chromium steel (HCS) with high hardness requirements, increase the chromium or nickel content to obtain an austenitic microstructure.