Abstract:
Mechanical part made of steel having high properties and process for manufacturing same. Mechanical part made of steel having high properties, characterized in that its composition, in percentages by weight, is: 0.05% ≤ C ≤ 0.25%; 1.2% ≤ Mn ≤ 2%; 1% ≤ Cr ≤ 2.5%; (830 - 270 C% - 90 Mn% - 70 Cr%) ≤ 560; traces ≤ Si ≤ 1.5%; traces ≤ Ni ≤ 1%; traces ≤ Mo ≤ 0.5%; traces ≤ Cu ≤ 1%; traces ≤ V ≤ 0.3%; traces ≤ Al ≤ 0.1%; traces ≤ B ≤ 0.005%; traces ≤ Ti ≤ 0.03% traces ≤ Nb ≤ 0.06%; traces ≤ S ≤ 0.1%; traces ≤ Ca ≤ 0.006%; traces ≤ Te ≤ 0.03%; traces ≤ Se ≤ 0.05%; traces ≤ Bi ≤ 0.05%; traces ≤ Pb ≤ 0.1%; the balance being iron and impurities resulting from the smelting, and in that its structure is bainitic and contains at most 20% in total of martensite and/or proeutectoid fernite and/or perlite. Process for manufacturing a mechanical part having this composition.
Abstract:
The inventive steel for mechanical parts is characterised by the composition thereof expressed in the following percentages by weight: 0.19 % = C = 0.25 %; 1.1 % = Mn = 1.5 %; 0.8 % = Si = 1.,2 %; 0.01 % = S = 0.09 %; traces = P = 0.025 %; traces = Ni = 0.25 %; 1 % = Cr = 1.4 %; 0.10 % = Mo = 0,25 %; traces = Cu = 0.30 %; 0.01 % = Al = 0.045 %; 0.010 % = Nb = 0.045 %; 0.0130 % = N = 0.0300 %; optionally traces = Bi = 0.10 % and/or traces = Pb = 0.12 % and/or traces = Te = 0.015 % and/or traces = Se = 0.030 % and/or traces = Ca = 0.0050 %. The rest being iron and impurities resulting from preparation, a chemical composition being adjusted in such a way that mean values J 3m , J 11m , J 15m et J 25m of five Jominy tests are such as a = | J 11m - J 3m x 14/22 - J 25m x 8/22 |= 2.5 HRC; and ß = J 3m - J 15m = 9 HRC. A method for producing a mechanical part from said steel and the thus obtainable mechanical part are also disclosed.
Abstract translation:用于机械部件的本发明钢的特征在于其组成以下列重量百分比表示:0.19%= C = 0.25%; 1.1%= Mn = 1.5%; 0.8%= Si = 1..2%; 0.01%= S = 0.09%; 痕量= P = 0.025%; 痕量= Ni = 0.25%; 1%= Cr = 1.4%; 0.10%= Mo = 0.25%; 痕量= Cu = 0.30%; 0.01%= Al = 0.045%; 0.010%= Nb = 0.045% 0.0130%= N = 0.0300%; 可选的迹线= Bi = 0.10%和/或迹线= Pb = 0.12%和/或迹线= Te = 0.015%和/或迹线= Se = 0.030%和/或迹线= Ca SUB> = 0.0050%。 其余为铁和由制备产生的杂质,化学成分以这样的方式调节,即平均值J 3m,J 11m,J 15m / 五个Jominy测试中的等于25m SUB>如a = | J 11m - J 3m x 14/22 -J 25m x 8/22 | = 2.5HRC; 并且ß= J 3m -J 15m = 9 HRC。 还公开了从所述钢和由此获得的机械部件制造机械部件的方法。
Abstract:
Pièce en acier mise en forme à chaud, de composition consistant en 0,22%≤C≤0,35%, 0,50%≤Mn≤1,70%; 0,50%≤Cr≤1,70%; traces≤Mo≤0,15%; traces≤Si≤0,40%; traces≤Ni≤0,50%; traces≤Cu≤0,50%; traces≤V≤0,08%; traces≤Al≤0,10%; 0,001%≤B≤0,010%; 0,01%≤Ti≤0,06%; traces≤Nb≤0,05%; traces≤S≤0,15%; trace ≤Ca≤0,010%; traces≤Te≤0,030%; traces≤Se≤0,050%; traces≤Bi≤0,050%; traces≤Pb≤0,100%; traces≤P≤0,100%; traces≤N≤0,013%; avec 540≤(830- 270*C%–90*Mn%–70*Cr%-83*Mo%-37*Ni%)≤600 et Ti%≥2,5N%. La microstructure consiste en au moins 70% de ferrite bainitique et de carbures ou d'austénite résiduelle, la fraction d'austénite résiduelle étant d'au plus à 10%, au plus 30% de martensite et/ou de ferrite pro-eutectoïde et/ou de perlite, la fraction de ferrite pro-eutectoïde et/ou de perlite étant d'au plus 10%.
Abstract:
An ingot mould has energetically cooled metal walls (1, 3) having means in their upper portion for decreasing the intensity of the heat flow extracted from the cast metal (2), such as a coating (6, 15) of a less conductive metal than that of the walls, or grooves (31) provided in said walls. On top of the walls is provided a heat insulating feeder bush (7) associated with gas injection means terminating in nozzles distributed on the inner periphery of said ingot mould. During the casting, the free surface of the liquid metal is maintained at the same level as the feeder bush, wherein the solid skin (21) only starts to solidify at the upper edge of the metal walls (3). The invention is particularly useful for the continuous casting of steel.
Abstract:
Acier pour la fabrication de pièces cémentées, caractérisé en ce que sa composition, en pourcentages pondéraux est : - 0,1% ≤ C ≤ 0,15%; - 0,8% ≤ Mn ≤ 2%; - 1% ≤ Cr ≤ 2,5%; - 0,2% ≤ Mo ≤ 0,6%; - traces ≤ Si ≤ 0,35%; - traces ≤ Ni ≤ 0,7%; - traces ≤ B ≤ 0,005%; - traces ≤ Ti ≤ 0,1%; - traces ≤ N ≤ 0,01% si 0.0005 % (5ppm) ≤ B ≤ 0,005%, et traces ≤ N ≤ 0.02 % si traces ≤ B ≤ 0.0005 % (5ppm); - traces ≤ Al ≤ 0,1%; - traces ≤V ≤ 0,3%; - traces ≤ P ≤ 0,025%; - traces ≤ Cu ≤ 1%, de préférence
Abstract translation:本发明涉及用于制造渗碳钢部件的钢,其特征在于,其组成为:0.1重量%= C = 0.15重量% 0.8wt%= Mn = 2wt%; 1重量%= Cr = 2.5重量% 0.2重量%= Mo = 0.6重量% 微量元素= Si = 0.35重量% 微量元素= Ni = 0.7重量% 微量元素= B = 0.005wt% 微量元素= Ti = 0.1重量% 如果0.0005重量%(5ppm)= B = 0.005重量%,微量元素= N = 0.01重量%,如果微量元素= B = 0.0005重量%(5ppm),微量元素= N = 0.02重量% - 痕量= Al = 0.1重量% 微量元素= V = 0.3wt%; 微量元素= P = 0.025重量% 微量元素= Cu = 1重量%,优选<0.6重量% 微量元素= S = 0.1重量%,其余为铁和由生产产生的杂质。 本发明还涉及由所述钢制成的渗碳钢部件及其制造方法。
Abstract:
The ingot mould of the invention includes a tubular metal member (4), of copper or copper alloy, cooled by water circulating against the outer wall thereof and causing the peripheral solidification of the cast metal as it contacts its inner wall. The mould also includes a non-cooled, heat-insulating refractory material feeder bush (9) for containing the liquid cast metal, extending above the cooled metal member (4) and defining therewith a continuous calibrating channel for the cast metal. A metal ring (16), cooled by an inner, horizontally circulating fluid, is inserted between said feeder bush (9) and the tubular member (4) and is aligned with the inner wall of said tubular member. The invention avoids deformations of the upper end of the cooled metal portion of the ingot mould.
Abstract:
The present invention relates to a plant for hot forging of parts from bars (2), comprising means (8) for heating the bars (2), means (3) for the longitudinal displacement of the bars, a bar-cutter (9) for hot-cutting the billets to a length l and comprising a stop (11) for setting the length of the billet and means for holding the cut billet, means (12) for detecting the extremities of the bars (2) and means (10) for rejecting the billets having a length smaller than l. The detection means are comprised of at least one sensor (12) for sensing the image of the extremities of the bars, joined or not joined, said sensor being placed at a distance l from the bar-cutter (9) and a calculating machine determining the number n = L/l of billets from the detected extremity, the calculator being associated on the one hand to said sensor (12) and, on the other hand, to means (5) for measuring the length L1 of the bars.
Abstract:
Pièce mécanique en acier à hautes caractéristiques et son procédé de fabrication Pièce mécanique en acier à hautes caractéristiques, caractérisée en ce que sa composition, en pourcentages pondéraux, est : 0,05% ≤ C ≤ 0,25%; 1,2% ≤ Mn ≤ 2%; 1% ≤ Cr ≤ 2,5%; (830 – 270 C% – 90 Mn% – 70 Cr%) ≤ 560; traces ≤ Si ≤ 1,5%; traces ≤ Ni ≤ 1%; traces ≤ Mo ≤ 0,5%; traces ≤ Cu ≤ 1%; traces ≤ V ≤ 0,3%; traces ≤ Al ≤ 0,1%; traces ≤ B ≤ 0,005%; traces ≤ Ti ≤ 0,03% traces ≤ Nb ≤ 0,06%; traces ≤ S ≤ 0,1%; traces ≤ Ca ≤ 0,006%; traces ≤ Te ≤ 0,03%; traces ≤ Se ≤ 0,05%; traces ≤ Bi ≤ 0,05%; traces ≤ Pb ≤ 0,1%; le reste étant du fer et des impuretés résultant de l'élaboration et en ce que sa structure est bainitique et contient au plus 20% au total de martensite et/ou fernite pro- eutectoïde et/ou perlite. Procédé de fabrication d'une pièce mécanique ayant cette composition.
Abstract translation:具有高性能的钢制机械部件及其制造方法。 由具有高性能的钢制成的机械部件,其特征在于,其重量百分比的组成为:0.05%= C = 0.25%; 1.2%= Mn = 2%; 1%= Cr = 2.5%; (830-270℃%-90Mn%-70%Cr%)= 560; 痕量= Si = 1.5%; 痕量= Ni = 1%; 痕量= Mo = 0.5%; 痕量= Cu = 1%; 痕量= V = 0.3%; 痕量= Al = 0.1%; 痕量= B = 0.005%; 痕量= Ti = 0.03%trace = Nb = 0.06%; 痕量= S = 0.1%; 痕量= Ca = 0.006%; 痕量= Te = 0.03%; 痕量= Se = 0.05%; 痕量= Bi = 0.05% 痕量= Pb = 0.1%; 余量为铁和冶炼产生的杂质,其结构为贝氏体,总共含有马氏体和/或共析过的蕨类和/或珍珠岩的总量的20%。 具有该组成的机械部件的制造方法。
Abstract:
Acier à ressorts à tenue en fatigue élevée à l'air et sous corrosion et à haute résistance à l'avachissement cyclique, de composition, en pourcentages pondéraux : C = 0,45 - 0,70% Si = 1,65 - 2,50% Mn = 0,20 - 0,75% Cr = 0,60 - 2% Ni = 0,15 - 1% Mo = traces - 1% V = 0,003 - 0,8% Cu = 0,10 - 1% Ti = 0,020 - 0,2% Nb = traces - 0,2% Al = 0,002 - 0,050% P = traces - 0,015% S = traces - 0,015% O = traces - 0,0020% N = 0,0020 - 0,0110% le reste étant du fer et des impuretés résultant de l'élaboration, et dont la teneur en carbone équivalent Ceq, calculée selon la formule Ceq% = [C%] + 0,12 [Si%]+ 0,17 [Mn%] - 0,1 [Ni%] + 0,13[Cr%] - 0,24 [V%] est comprise entre 0,80 et 1,00%, et dont la dureté, après trempe et revenu, est supérieure ou égale à 55HRC. Procédé de fabrication d'un ressort utilisant cet acier. Ressort réalisé en un tel acier.
Abstract translation:本发明涉及弹簧钢,其在空气中和腐蚀性环境中具有增加的疲劳强度,并且具有高的抗循环松弛性。 所述钢的组成含有以重量%表示的以下成分,即:C = 0.45±0.7% Si = 1.65±2.5% Mn = 0.2 0.75%; Cr = 0.6 - 2%; Ni = 0.15-1%; Mo =痕量 - 1%; V = 0.003 0.8%; Cu = 0.1-1%; Ti = 0.02±0.2% Nb =痕量0.2%; Al = 0.002 0.05%; P =痕量0.015%; S =痕量0.015%; O =痕量0.002%; N = 0.002 0.011%,剩余部分由生产的铁和杂质构成。 此外,使用式Ceq%= [C%] + 0.12 [Si%] + 0.17 [Mn%] 0.1 [Ni%] + 0.13 [Cr%] 0.24 [V%]计算的等效碳含量Ceq为 在0.8和1%之间,淬火和回火后的硬度大于或等于55HRC。 本发明还涉及使用所述钢和由此制造的弹簧制造弹簧的方法。