Patent ID: 11885289
Assignee: CATERPILLAR INC.
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  F | IPC C  F

Claim 9:
10. The fuel system of claim 6, further comprising:
a second outer layer having a first hardness of at least about 55 Rockwell Hardness Scale C (HRC) and compressive stress and positioned on an internal surface of the body, wherein the second outer layer has a first carbon content in a range of about 0.7% by weight to about 1.6% by weight and has a thickness of at least 300 microns (μm); and
a nozzle valve movably positioned within the nozzle tip, wherein, during operation, a maximum hertzian stress is formed within the second outer layer during a collision between the nozzle valve and the nozzle tip.