Device for comminuting abrasive materials

An apparatus for comminuting abrasive materials, comprising:

• at least one component;
• and
• a welded wear protection profile disposed on an outer surface of said at least one component and formed from a plurality of welds of an iron-chromium-carbon hard alloy having a hardness of greater than 55 HRC, said plurality of welds having a geometric length-to-width ratio of ≦4.

The apparatus of claim 1, wherein said welds are crack-free.

The apparatus of claim 1, wherein said welds are separated a predefined distance from each other.

The apparatus of claim 1, wherein said welds protrude from said outer surface of said at least one component and have a height of up to 15 mm.

The apparatus of claim 1, wherein said welds are disposed on said at least one component in a repeating geometric pattern.

The apparatus of claim 1, wherein a filler material used for the welds has formed carbides of iron and of chromium, and also special carbides.

The apparatus of claim 1, wherein said wear protection profile is disposed on a body made of at least one of:

• a. a bainitic nodular cast iron having an elongation at break of approximately 0.1 to 2.5%, a compressive strength of 1000 to approximately 1800 MPa and a hardness of 42 to 55 HRC,
• b. a carbidic cementite-solidified cast iron material having carbides of at least one of iron, chromium, molybdenum, vanadium or niobium, or
• c. a forged material.

The apparatus of claim 1, wherein said welds are one of weld seams or spot welds.

The apparatus of claim 1, wherein said welds are spot welds having a diameter of between 7 mm and 25 mm, and a height of between 7 mm and 20 mm.

The apparatus of claim 1, wherein said component is one of a cylinder, a roller, a cone, a ball, a crushing jaw, a grinding track, or plate segments of a mill.