A Preliminary Ferritic-Martensitic Stainless Steel Constitution Diagram

摘要

This paper describes preliminary research to develop a constitution diagram that will more accurately predict the microstructure of ferritic and marten-sitic stainless steel weld deposits. A button melting technique was used to produce a wide range of compositions using mixtures of conventional ferritic and martensitic stainless steels, including types 403, 409, 410, 430, 439 and 444. These samples were prepared metallo-graphically, and the vol-% ferrite and martensite was determined quantitatively. In addition, the hardness and ferrite number (FN) were measured. Using this data, a preliminary constitution diagram is proposed that provides a more accurate method for predicting the mi-crostructures of arc welds in ferritic and martensitic stainless steels.