Undercarriage track link

A process of forming a track link, comprising:

• fabricating a steel form with a first surface and a second surface opposite the first side;
• heating the steel form to create an austenite crystal structure throughout the steel form;
• quenching the steel form to create a martensite crystal structure throughout the steel form:
• tempering the steel form to create a substantially uniform hardness of 45 to 55 Rkw C throughout the steel form;
• and
• machining the steel form after the fabricating, heating, quenching, and tempering.

An undercarriage assembly, comprising:

• a track roller frame;
• a plurality of track links, each track link of the plurality of track links pivotally connected to an adjacent track link of the plurality of track links via a respective pivot joint, such that the plurality of track links forms an endless chain;
• and
• a plurality of rollers, configured to engage the plurality of track links,
• wherein:
• each track link of the plurality of track links includes:
• a body having a first surface and a second surface opposite the first surface;
• a shoe face extending between the first and second surfaces at a side of the body;
• and
• a roller rail extending between the first and second surfaces at a side of the body opposite the shoe face;
• the body has a substantially uniform hardness of about 45 to 55 Rkw C between the shoe face and the roller rail;
• and
• the body is made of steel having a composition, by weight percent, of about 0.20 to 0.45% carbon, about 0.4 to 1.5% manganese, about 0.5 to 2.0% silicon, about 0.01 to 2.0% chromium, about 0.15 to 1.2% molybdenum, about 0.01 to 0.40% vanadium, about 0.01 to 0,25% titanium, about 0.005 to 0.05% aluminum, about 0.0001 to 0.010% boron, less than about 0.002% oxygen, about 0.005 to 0.017% nitrogen, and a balance of essentially iron.