Track link production method
AssigneesBerco S.p.A., thyssenkrupp AG
InventorFrancesco GRENZI
Life of this patent
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Abstract
The present disclosure refers to a method for manufacturing a track link for a running gear of a tracked vehicle, comprising the following method steps: P1) providing a forging blank of steel, P2) hot forging the forging blank to produce a track link blank and hot trimming of the track link blank to form at least a wheel tread part of the track link blank, P3) quenching the track link blank to a temperature T1, P4) low temperature tempering the track link blank at a temperature of 200±50° C., and P5) finish machining the tempered track link blank to produce the final shape of the track link.
Claims9
-5. (canceled)
A method for manufacturing a track link for a running gear of a tracked vehicle, the method comprising:
- P1) providing a forging blank of steel;
- P2) hot forging the forging blank to produce a track link blank and hot trimming of the track link blank to form at least a wheel tread part of the track link blank;
- P3) quenching the track link blank to a temperature T1, wherein a starting temperature for the quenching of the track link blank in step P3) is 880±10° C. and the temperature T1 is a temperature in the range between 235° C. and 190° C.;
- P4) low temperature tempering the track link blank at a temperature of 200±50° C.;
- P5) finish machining the tempered track link blank to produce the final shape of the track link;
- and
- wherein the steel of the forging blank has the following composition (in % by weight):
- 0.25-0.33% Carbon (C),
- 0.75-1.05% Manganese (Mn),
- 0.15-0.35% Silicon (Si),
- 0.75-0.85% Molybdenum (Mo),
- 0.65-0.95% Chromium (Cr),
- 0.65-0.95% Nickel (Ni),
- 0.02-0.05% Niobium (Nb), and
- up to a maximum of 0.015% Phosporus (P),
- the balance being iron and unavoidable impurities.
Dependencies are inferred from the claim text.