Cutting edge with wear-resistant material

Claim 2

In a cutting edge assembly for an earthworking machine having a forwardly directed front cutting edge and at least one side edge extending rearwardly from the forward cutting edge, the assembly being in the form of a flat plate, the improvement comprising: a front channel extending generally parallel to but inwardly spaced from the cutting edge; a side channel extending generally parallel to but inwardly spaced from said side edge; and individual rectangular wear-resistant blocks inlaid side by side within the front channel and the side channel so that an upper surface of the blocks is coincident with the surface of the flat plate.

Claim 3

In a cutting edge assembly as claimed in claim 1 wherein two side edges extend rearward from the front cutting edge, a side channel extends rearward from the front channel along each of said two side edges, and wear-resistant material is inlaid in each of said side channels.

Claim 4

In a cutting edge assembly for an earthworking machine having a forwardly directed front cutting edge and side edges extending rearwardly from the forward cutting edge, the assembly being in the form of a flat plate, the improvement comprising: a front channel extending parallel to but inwardly spaced from the front cutting edge; a first and a second side channel extending rearwardly from the front channel and generally parallel to but inwardly spaced from the side edges; and individual wear-resistant blocks formed of an alloy having spheroidal particles retained by a matrix alloy inlaid side by side within the front channel and the first and second side channels so that an upper surface of the blocks is coincident with the surface of the flat plate, wherein the front channel intersects the first and the second side channels to form corners and said blocks extend to said side edges only at said corners.

Claim 5

In a cutting edge assembly for an earthworking machine having a forwardly directed front cutting edge and side edges extending rearwardly from the forward cutting edge, the assembly being in the form of a flat plate, the improvement comprising: a front channel extending parallel to but inwardly spaced from the front cutting edge; a first and a second side channel extending rearwardly from the front channel and generally parallel to but inwardly spaced from the side edges; and individual wear-resistant blocks formed of an alloy having spheroidal particles retained by a matrix alloy inlaid side by side within the front channel and the first and second side channels so that an upper surface of the blocks is coincident with the surface of the flat plate, wherein the front channel intersects the first and the second side channels to form corners and said blocks extend to said side edges only at said corners.

Claim 6

The cutting edge assembly of claim 3 wherein the wear-resistant material is formed of an alloy having spheroidal particles retained by a matrix alloy.

Claim 7

The cutting edge assembly of claim 4 wherein the spheroidal particles are of boron, chromium and iron and the matrix alloy is of iron and boron.

Claim 8

The cutting edge assembly of claim 3 wherein the blocks are brazed to each other and to the channel.

Claim 9

The cutting edge assembly of claim 3 wherein the assembly is constructed in a plurality of sections.

Claim 10

The cutting edge assembly of claim 3 wherein the wear-resistant alloy blocks consist of spheroidal particles of about 58% chromium, 9% boron and the remainder iron, surrounded by a matrix alloy of about 3.8% boron with the remainder iron.