Bi-metal cutting edge

Abstract

A cutting edge for a machine. The cutting edge includes a first layer formed of a first material and forming a front surface configured to engage a working material. The cutting edge further including a second layer that extends from the first layer and away from the front surface. The second layer formed of a second material harder than the first material to improve overall wear resistance of the cutting edge.

What is claimed is: 
     
         1 . A cutting edge for a ground engaging machine with a moldboard having a front side, the cutting edge comprising:
 a first layer formed of a first material and forming a front surface configured to engage a working material; and   a second layer formed of a second material harder than the first material, the second layer extending from the first layer away from the front surface.   
     
     
         2 . The cutting edge of  claim 1 , wherein the cutting edge includes mounting holes shaped to receive fasteners to mount the cutting edge to the moldboard. 
     
     
         3 . The cutting edge of  claim 1 , wherein the second has a shape with a trapezoidal cross-section that extends along a length of the cutting edge. 
     
     
         4 . The cutting edge of  claim 1 , wherein the second layer is coextensive with the first layer at an interface of the first layer and the second layer. 
     
     
         5 . The cutting edge of  claim 1 , wherein the cutting edge further comprises a third layer extending from the second layer opposite the first layer, the third layer formed of a third material softer than the second layer. 
     
     
         6 . The cutting edge of  claim 5 , wherein the third layer is configured to contact the front side of the moldboard. 
     
     
         7 . The cutting edge of  claim 1 , wherein the second layer has a C scale Rockwell Hardness between 55 and 65. 
     
     
         8 . The cutting edge of  claim 1 , wherein the second layer comprises temper resistant steel. 
     
     
         9 . A cutting edge for a ground engaging machine with a moldboard, the cutting edge comprising:
 a first end;   a second end opposite the first end;   a first layer extending from the first end to the second end, the first layer formed of a first material and configured to engage a working material; and   a second layer extending from proximate the first end to proximate the second end along an interface with the first material, the second layer formed of a second material harder than the first material.   
     
     
         10 . The cutting edge of  claim 9 , wherein the cutting edge includes mounting holes shaped to receive fasteners to mount the cutting edge to the moldboard. 
     
     
         11 . The cutting edge of  claim 10 , wherein the mounting holes are located proximate to the second end. 
     
     
         12 . The cutting edge of  claim 9 , wherein the cutting edge further comprises a third layer extending from the second layer opposite the first layer, the third layer formed of a third material softer than the second layer. 
     
     
         13 . The cutting edge of  claim 12 , wherein the third layer is configured to contact a portion of the machine. 
     
     
         14 . The cutting edge of  claim 12 , wherein the third layer has a shape with a trapezoidal cross-section that extends along a length of the cutting edge. 
     
     
         15 . The cutting edge of  claim 9 , wherein the second layer has a C scale Rockwell Hardness between 55 and 65. 
     
     
         16 . The cutting edge of  claim 9 , wherein the second layer comprises temper resistant steel. 
     
     
         17 . A cutting edge for a ground engaging machine with a moldboard having a front side, the cutting edge comprising:
 a first end;   a second end opposite the first end;   mounting holes shaped to receive fasteners to mount the cutting edge to the moldboard;   a first layer formed by a first material and extending from the first end to the second end, the first layer configured to engage a working material; and   a second layer having a second material harder than the first material, the second layer extending from the first layer.   
     
     
         18 . The cutting edge of  claim 17 , wherein the mounting holes are located proximate to the second end. 
     
     
         19 . The cutting edge of  claim 17 , wherein the second layer has a C scale Rockwell Hardness between 55 and 65. 
     
     
         20 . The cutting edge of  claim 17 , wherein the second layer comprises temper resistant steel.