High-Speed Steel for Saw Blades

Abstract

High-speed steel for saw blades, presenting a composition of alloy elements consisting, in mass percentage, of Carbon between 0.5 and 1.5; Chromium between 1.0 and 10.0; equivalent Tungsten, given by 2Mo+W relation, between 3.0 and 10.0; Niobium between 0.5 and 2.0. Niobium may be partially or fully replaced with Vanadium, at a ratio of 2% Niobium to each 1% Vanadium; Vanadium between 0.3 and 2.0. Vanadium may be partially or fully replaced with Niobium, at a ratio of 2% Niobium to each 1% Vanadium, Silicon between 0.3 and 3.5. Silicon may be partially or fully replaced with Aluminum, at a 1:1 ratio; Cobalt lower than 8, the remaining substantially Fe and impurities inevitable to the preparation process.

1 . High-speed steel for saw blades, for presenting a composition of alloy elements consisting, in mass percentage, of carbon between 0.5 and 1.5, chromium between 1.0 and 10.0; equivalent tungsten, given by 2Mo+W relation, between 3.0 and 10.0, niobium between 0.5 and 2.0, vanadium between 0.3 and 2.0, silicon between 0.3 and 3.5, aluminum lower than 0.5, cobalt lower than 8.0, and the remaining substantially Fe and impurities inevitable to the preparation process, said alloy produced by casting ingots, either by conventional casting or continuous casting, which are hot forged or rolled to the final application sizes. 
   
   
       2 . High-speed steel for saw blades, for presenting a composition of alloy elements consisting, in mass percentage, of carbon between 0.5 and 1.5, chromium between 1.0 and 10.0, equivalent tungsten, given by 2Mo+W relation, between 3.0 and 10.0, niobium between 0.5 and 2.0, vanadium between 0.3 and 2.0, silicon between 1.0 and 3.5, aluminum lower than 0.5, cobalt lower than 8.0, the remaining substantially Fe and impurities inevitable to the preparation process; this alloy is produced by casting ingots, either by conventional casting or continuous casting, which are hot forged or rolled to the final application sizes. 
   
   
       3 . High-speed for saw blades, for presenting a composition of alloy elements consisting, in mass percentage, of carbon between 0.5 and 1.5, chromium between 1.0 and 5.0, equivalent tungsten, given by 2Mo+W relation, between 3.0 and 10.0, niobium between 0.5 and 2.0, vanadium between 0.3 and 2.0, silicon between 0.7 and 3.5, aluminum lower than 0.5, cobalt lower than 8.0, and the remaining substantially Fe and impurities inevitable to the preparation process, said alloy produced by casting ingots, either by conventional casting or continuous casting, which are hot forged or rolled to the final application sizes. 
   
   
       4 . High-speed steel for saw blades, for presenting a composition of alloy elements consisting, in mass percentage, of carbon between 0.6 and 1.4, chromium between 3.0 and 5.0, equivalent tungsten, given by 2Mo+W relation, between 4.0 and 8.0, niobium between 0.8 and 1.6, vanadium between 0.5 and 1.0, silicon between 0.7 and 2.0, aluminum lower than 0.5, cobalt lower than 5.0, the remaining substantially Fe and impurities inevitable to the preparation process; said alloy produced by casting ingots, either by conventional casting or continuous casting, which are hot forged or rolled to the final application sizes. 
   
   
       5 . High-speed steel for saw blades, in accordance with  claim 1 , wherein, in mass percentage, a substitution of vanadium by niobium or niobium by vanadium is at a ratio of Nb:V=2:1, but keeping a minimum of niobium content of 0.5. 
   
   
       6 . High-speed steel for saw blades, in accordance with  claim 1 , wherein, in mass percentage, the equivalent vanadium, given by the relation V+Nb/2, is higher than 1.25 but lower than 3.0. 
   
   
       7 . High-speed steel for saw blades, in accordance with  claim 1 , wherein, in mass percentage, the silicon content is partially exchangeable by aluminum at a ratio of Si:Al=1:1, with the aluminum content being a maximum 0.5. 
   
   
       8 . High-speed steel for saw blades, in accordance with  claim 1 , wherein the mass percentage of aluminum is between 0.5 and 2.0%. 
   
   
       9 . High-speed steel for saw blades, in accordance  claim 1 , wherein the mass percentage of aluminum is between 0.8 and 1.2%. 
   
   
       10 . High-speed steel for saw blades, in accordance with  claim 1 , further containing, in mass percentage, 1.5 manganese at maximum, 1.5 nickel at maximum, 1.5 copper at maximum, 0.10 phosphorus at maximum, 0.10 sulfur at maximum, and 0.10 nitrogen at maximum. 
   
   
       11 . High-speed steel for saw blades, in accordance with  claim 1 , further containing, in mass percentage, 1.0 manganese at maximum, 1.0 nickel at maximum, 1.0 copper at maximum, 0.5 aluminum at maximum, 0.08 phosphorus at maximum, 0.01 sulfur at maximum, and 0.02 nitrogen at maximum. 
   
   
       12 . High-speed steel for saw blades, in accordance with  claim 1 , wherein, in mass percentage, cobalt is lower than 1.0. 
   
   
       13 . High-speed steel for saw blades, in accordance with  claim 1 , further containing, in mass percentage, 0.5 manganese at maximum, 0.5 nickel at maximum, 0.5 copper at maximum, 0.2 aluminum at maximum, 0.04 phosphorus at maximum, 0.005 sulfur at maximum, and 0.01 nitrogen at maximum. 
   
   
       14 . High-speed steel for saw blades, in accordance with  claim 1 , further containing, in mass percentage, 0.5 Ce or other rare-earth elements at a maximum. 
   
   
       15 . High-speed steel for saw blades, in accordance with  claim 1 , wherein, in mass percentage, titanium, zirconium or tantalum elements replace either partially or fully niobium and vanadium elements, at a ratio in which 1 part of Ti corresponds to 1 part of vanadium or 0.5 parts of niobium; and 1 part of Ta or Zr corresponds to 2 parts of vanadium or 1 part of niobium. 
   
   
       16 . High-speed steel for saw blades, in accordance with  claim 1 , wherein the high-speed steel is used in cutting tools and machining. 
   
   
       17 . High-speed steel for saw blades, in accordance with  claim 1 , wherein the high-speed steel is used in saw blades, in manual machines or saws, whether they are fully formed by high-speed steel or the bimetallic type. 
   
   
       18 . High-speed steel for saw blades, in accordance with  claim 1 , wherein the high-speed steel is used in rotating cut, such as helicoidal drills, milling devices, taps, dies and other tools employed to machine metallic materials or other materials. 
   
   
       19 . High-speed steel for saw blades, in accordance with  claim 1 , wherein the high-speed steel is used in machining tools with a low working life expectancy, such as low productivity industrial tools and home use tools. 
   
   
       20 . High-speed steel for saw blades, in accordance with  claim 1 , wherein the high-speed steel is used in tools for processes of cold conforming, warm conforming and hot conforming, for steels, nonferrous alloys or other solid materials. 
   
   
       21 . High-speed steel for saw blades, in accordance with  claim 1 , wherein the high-speed steel is produced by conventional casting or continuous, followed by hot forming processes for production of the final product sizes, such as coils, bars, strips and sheets, or the alloy can even be used in the as-cast condition. 
   
   
       22 . High-speed steel for saw blades, in accordance with  claim 2 , wherein the high-speed steel is produced by processes that involve fragmentation of the liquid and a post aggregation, such as powder metallurgy or spray forming processes.