Process for direct heat treatment of track links for tractors or

Metal treatment – Compositions – Heat treating

Patent

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148 123, 148 36, C21D 800

Patent

active

044191529

ABSTRACT:
Process for the manufacture of steel track links for tracked vehicles, comprising forging steel track links at an initial forging temperature of 1150.degree.-1200.degree. C. for 45-60 seconds with a finish forging temperature of 950.degree.-1050.degree. C., subjecting the links thus-produced to initial cooling at a rate of 2.degree.-4.degree. C./s to a temperature of 720.degree.-830.degree. C., maintaining the links at a temperature of 800.degree.-850.degree. C. for 2-3 minutes, again cooling the links at a rate of 10.degree.-15.degree. C./s to a second temperature of 180.degree.-380.degree. C., and maintaining the links at this second temperature for a period of 10-20 minutes, the steel having the following weight percent compositions:

REFERENCES:
patent: 3227586 (1966-01-01), Spencer

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