Lip for excavating bucket

Abstract

A cast lip for an excavating bucket composed of a ferrous alloy having at least seven percent chromium by weight, 3%-6% nickel by weight, and ≤0.12% carbon by weight, and a primarily martensitic structure.

1 . A cast lip for an excavating bucket defined by at least one cast body having a length to extend between sidewalls of the bucket, wherein the cast lip is composed of a ferrous alloy having 10%-15% chromium by weight, 3%-6% nickel by weight, and 0.12% or less carbon by weight, and a primarily martensitic structure. 
     
     
         2 . The cast lip of  claim 1 , wherein the ferrous alloy includes 0.10% or less by weight of each of carbon, manganese, silicon, and molybdenum. 
     
     
         3 . The cast lip of  claim 1 , wherein the ferrous alloy includes 3% or less by weight of at least one of manganese, silicon, and molybdenum. 
     
     
         4 - 5 . (canceled) 
     
     
         6 . The cast lip of  claim 1 , including a plurality of forwardly projecting noses, each for mounting a tooth component and a plurality of mounting areas for mounting shrouds between the plurality of forwardly projecting noses. 
     
     
         7 . A cast lip for an excavating bucket defined by at least one cast body having a length to extend between sidewalls of the bucket, the lip being composed of a ferrous alloy having at least 10% chromium by weight and 0.12% or less carbon by weight, and a primarily martensitic structure. 
     
     
         8 . The cast lip of  claim 7 , wherein the ferrous alloy includes 3%-6% nickel by weight. 
     
     
         9 . The cast lip of  claim 7 , wherein the ferrous alloy includes 3% or less by weight of at least one of manganese, silicon and/or molybdenum. 
     
     
         10 . The cast lip of  claim 7 , wherein the ferrous alloy includes 10%-15% chromium by weight. 
     
     
         11 . The cast lip of  claim 7 , wherein the ferrous alloy includes 0.10% or less of each of carbon, manganese, silicon, and molybdenum by weight 
     
     
         12 . The cast lip of  claim 7 , including a plurality of forwardly projecting noses each for mounting a tooth component, and a plurality of mounting areas for mounting shrouds between the plurality of forwardly projecting noses. 
     
     
         13 . The cast lip of  claim 7 , which weighs at least 6500 pounds. 
     
     
         14 . The cast lip of  claim 7 , which has a maximum thickness of at least 9 inches. 
     
     
         15 - 18 . (canceled) 
     
     
         19 . The cast lip of  claim 1 , which weighs at least 6500 pounds. 
     
     
         20 . The cast lip of  claim 1 , which has a maximum thickness of at least 9 inches. 
     
     
         21 . The cast lip of  claim 1 , wherein the stainless steel includes 0.10% or less carbon by weight. 
     
     
         22 - 35 . (canceled)