PARTS WITH A BAINITIC STRUCTURE HAVING HIGH STRENGTH PROPERTIES AND MANUFACTURING PROCESS

• Main Authors: Bernard RESIAK, Marie- Thérèse PERROT-SIMONETTA, Ulrich VOLL
• Format: Patent
• Language: English; Spanish
• Published: 15.12.2017
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The subject of the invention is a part, the composition of which comprises, the contents being expressed as percentages by weight, 0.10 < C < 0.30, 1.6 < Mn < 2.1, 0.5 < Cr = 1.7, 0.5 < Si < 1.0, 0.065 < Nb < 0.15, 0.0010 < B < 0.0050, 0.0010 < N < 0.0130, 0 < Al < 0.060, 0 < Mo < 1.00, 0 < Ni < 1.0, 0.01 < Ti < 0.07, 0 < V < 0.3, 0 < P < 0.050, 0.01 < S < 0.1, 0 < Cu < 0.5, 0 < Sn < 0.1, the remainder of the composition consisting of iron and inevitable impurities resulting from the smelting, the microstructure consisting, in surface proportions, of 100% to 70% bainite, of less than 30% residual austenite and of less than 5% ferrite, and a process for the manufacture thereof. El objetivo de la invención es una parte cuya composición comprende los contenidos que se expresan como porcentajes en peso, 0.10 = C = 0.30, 1,6 = Mn = 2,1, 0.5 = Cr 1,7, 0.5 = Si = 1.0, 0.065 = Nb = 0.15, 0.0010 = B = 0.0050, 0.0010 = N = 0.0130, 0 = Al = 0.060, 0 = Mo = 1.00, 0 = Ni 1.0, 0.01 = Ti = 0.07, 0 = V = 0.3, 0 = P = 0.050,0.01 = S = 0.1,0 = Cu = 0.5, 0 = Sn = 0.1,el resto de la composición consiste en hierro e impurezas inevitables resultantes de la fundición, la microestructura consiste en proporciones superficiales, de 100% a 70% de bainita, menos de un 30% de austenita residual y menos de un 5% de ferrita, y el proceso para su fabricación.