Casting manganese steel austenu00ectico of grain refined and microadiu00e7u00f5es of vanadium and titu2030nio and method for its production

摘要

"Casting manganese steel austenu00ectico of grain refined and microadiu00e7u00f5es of vanadium and titu2030nio and method for its production.The present invention relates to an Austenitic Manganese Steel Microalloyed with nitrogen, vanadium and titanium were used to cast such as vats.Tupperware and jaws produced as components of wear of crushers in the mining and aggregate, hammers used in wood chippers of scrap.Deviations and keys used in railway crossings and buckets and shoes for crawler tractors used in mechanical excavators, mining.These new compositions exhibit a fine grain size and precipitates of carbonitrides which result in castings having a useful life of 20 to 70% longer than the cast of the previous technique.The austenitic manganese steel includes, in percentage weight: About 11.0% to 24.0% manganese, about 1.0% to 1.4% of carbon, up to about 1% silicon, up to about 1.9% chromium.Up to about 0.25% nickel, up to approximately 1.0% of molybdenum, up to about 0.2% aluminum, up to about 0.25% copper, phosphorus and sulfur as impurities in amounts of about 0.07% max and approximately 0.06% maximum.Respectively, additions of titanium microligau00e7u00f5es in quantities of about 0.020 - 0.070%, optionally microligau00e7u00f5es additions of niobium in quantities of about 0.020 - 0.070%Additions of vanadium microligau00e7u00f5es in quantities of about 0.020 - 0.070%, nitrogen in quantities of about 100 to 1000 ppm.And such that the total amount of additions of niobium vanadium titanium microligau00e7u00f5es + + + nitrogen is not less than 0.05% and not more than about 0.22%.The reason of carbon additions of microligau00e7u00f5es being in the range of about 10: 1 - 25: 1, and the balance of the League being essentially iron.The alloy is characterized by a substantial absence of zirconium and the presence of precipitated carbonitrides of titanium.