Method for saving ductile from material having a concrete lining
AssigneeC. & E. Fein GmbH
InventorsGunter Bauer, Rudolf Breu
Life of this patent
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Abstract
A saw blade possesses a base element onto which boron nitride particles are applied in the cutting region. The boron nitride particles are bonded by means of a metallic bonding layer, which preferably consists of nickel or a nickel alloy with a Vickers hardness of at least 600 HV. The bonding layer is preferably deposited galvanically. The boron nitride particles advantageously possess a particle size of approximately 0.5 to 0.8 mm, preferably approximately 0.6 to 0.7 mm. The saw blade possesses particular advantages for use as a reciprocating saw blade for sawing GGG cast iron pipes with a cement lining and fiber-reinforced cement jacket, resulting in considerably improved cutting performance and service life.
Claims15
A method of cutting a pipe made of a ductile iron-based material and having a lining comprising a material made from one of a cement-based material and a fiber-reinforced material, the method comprising sawing the pipe with a saw blade comprising a metallic base element and a cutting region disposed along an edge of said base element, said cutting region at least partially covered with a metallic coating in which a plurality of boron nitride particles are dispersed, said particles protruding at least partially outwardly from said coating.
Dependencies are inferred from the claim text.