Stress relieved grinding rod having hard outer shell

Details Stress relieved grinding rod having hard outer shell Stress relieved grinding rod having hard outer shell

1998-06-03

1999-10-26

Yee, Deborah

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

148575, 148902, C21D 908

Patent

active

059721359

ABSTRACT:
A grinding rod having a hardened outer shell of tempered martensite is adapted for use in heavy duty grinding environments. The rod is stress relieved to reduce internal compressive stresses in the tempered martensitic shell to less than 60 ksi and greater than 15 ksi. Such stress relieve stabilizes the rod against break-up as caused by the balancing tensile stresses in the pearlitic core exceeding tensile strength of the core.

REFERENCES:
patent: 4589934 (1986-05-01), Glodwski et al.
patent: 4840686 (1989-06-01), Arnett et al.

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