Nano-composite martensitic steels

Details Nano-composite martensitic steels Nano-composite martensitic steels

2006-10-10

2006-10-10

King, Roy (Department: 1742)

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

C148S333000, C148S336000

Reexamination Certificate

active

07118637

ABSTRACT:
Carbon steels of high performance are disclosed that contain dislocated lath structures in which laths of martensite alternate with thin films of austenite, but in which each grain of the dislocated lath structure is limited to a single microstructure variant by orienting all austenite thin films in the same direction. This is achieved by careful control of the grain size to less than ten microns. Further improvement in the performance of the steel is achieved by processing the steel in such a way that the formation of bainite, pearlite, and interphase precipitation is avoided.

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Yao, C.K. et al.; “Influense of Hot-Deformation on Morphology and Effective Grain Size of Lath Martensite in 18Ni Maraging Steel”; 1986,Mater. Chem. Phys., vol. 14, No. 6, pp. 559-568.

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