KINETICS OF THE BAINITE REACTION IN ALLOY STEELS
Abstract
A study was made of the structure, reaction kinetics and mechanism of the bainite reaction in alloy steels. The kinetics of the over-all reaction are influenced significantly by prior thermal history. Transformation is retarded by prior transformation at a higher temperature in this range and stabilization of the bainite reaction, analogous to the stabilization of the martensite reaction, accompanies this treatment. Prior treatment at a lower temperature acceler-ATES THE BAINITE REACTION AND THIS ACCELERATION CAN BE REMOVED BY INSERTING AN ANNEALING TREATMENT IN THE BAY BETWEEN THE PRIOR AND THE FINAL ISOTHERMAL TRANSFORMATIONS. This suggests that the acceleration effect results primarily from the ability of transformation strain to catalyse nucleation of the bainite reaction. A study of carbon enrichment of austenite and the carbide phase in bainite indicates that there is a fundamental difference between upper and lower bainite. It is suggested that variations in interface mobility are associated with the structural difference between upper and lower bainite. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1962
- Accession Number
- AD0284897
Entities
People
- R.f. Hehemann
- R.h. Goodenow