Vdm Metals International Gmbh

Vdm Metals Gmbh

Voestalpine Grobblech Gmbh

Jutta Kloewer

Heike Hattendorf

Bodo Gehrmann

Ralf-Udo Husemann

Ali Aghajani

Claudius Schindler

Julia Kraemer Geb Rosenberg

Julia Rosenberg

Franz Winter

Franz-Josef Wahlers

Juergen Tewes

A method produces semi-finished products from a nickel-based alloy having the composition (in wt. %): Ni&#x3e;50-&#x3c;55%, Cr&#x3e;17-&#x3c;21%, Nb&#x3e;4.8-&#x3c;5.2%, Mo&#x3e;2.8-&#x3c;3.3%, Ti&#x3e;0.8-&#x3c;1.15%, Al&#x3e;0.4-&#x3c;0.6%, C maximum 0.045%, Co maximum 1.0%, Mn maximum 0.35%, Si maximum 0.35%, S maximum 0.01%, Cu maximum 0.3%, the remainder iron and unavoidable impurities. B 0.0001-0.01%, P 0.0001-0.02% are added. In the method: the alloy is melted, or remelted, to produce preliminary products that then undergo a hot-forming process and subsequently undergo a multi-stage annealing and aging treatment, a solution heat treatment being carried out between 1000 and 1100&#xb0; C. for 1-3 hours, then cooled in air, water or oil, and made to undergo a precipitation hardening process between 650&#xb0; C.-&#x3c;770&#xb0; C. for 5-9 hours, then cooled to room temperature, the intermediate products undergoing, if necessary, at least one further heating process.

Method for producing semi-finished products from a nickel-based alloy

A roll-bonded clad metal sheet and a method for producing a roll-bonded clad metal sheet is provided. The roll-bonded clad sheet includes a metallic base material layer and a metallic cladding material layer which are joined to one another by a metallurgical bond. The metallic cladding material layer includes a nickel-based material whose chemical composition includes, in % by mass, a proportion of more than 50% of Ni and a proportion of 3.1% of Nb. The metallurgical bond is obtained by a thermomechanical rolling process including a first rolling phase for prerolling, a second rolling phase for final forming and a cooling time between the first rolling phase and the second rolling phase, wherein a final rolling temperature of the second rolling phase is set to a value equal to or less than 880&#xb0; C.

Method for producing roll-bonded metal sheets

Hardened nickel-chromium-titanium-aluminum wrought alloy contains, (in mass %) 5-35% chromium, 1.0-3.0% titanium, 0.6-2.0% aluminum, 0.005-0.10% carbon, 0.0005-0.050% nitrogen, 0.0005-0.030% phosphorus, max. of each (next eleven) 0.010% sulfur 0.020% oxygen 0.70% silicon 2.0% manganese 0.05% magnesium 0.05% calcium 2.0% molybdenum 2.0% tungsten 0.5% niobium 0.5% copper 0.5% vanadium, 0-20% Fe, 0-15% cobalt, 0-0.20% Zr, 0.0001-0.008% boron, the remainder nickel and usual impurities. The nickel content is greater than 35%.Cr+Fe+Co&#x2265;26% fh&#x2265;0 fh=6.49+3.88 Ti+1.36 Al&#x2212;0.301 Fe+(0.759&#x2212;0.0209 Co) Co&#x2212;0.428 Cr&#x2212;28.2 C.

Hardened nickel-chromium-titanium-aluminum alloy with good wear resistance, creep resistance, corrosion resistance and workability

Titanium-free alloy which has great resistance to pitting and crevice corrosion and a high yield point in the strain-hardened state and includes (in wt %) a maximum of 0.02% C, a maximum of 0.01% S, a maximum of 0.03% N, 20.0-23.0% Cr, 39.0-44.0% Ni, 0.4-&#x3c;1.0% Mn, 0.1-&#x3c;0.5% Si, &#x3e;4.0-&#x3c;7.0% Mo, a maximum of 0.15% Nb, &#x3e;1.5-&#x3c;2.5% Cu, 0.05-&#x3c;0.3% Al, a maximum of 0.5% Co, 0.001-&#x3c;0.005% B, 0.005-&#x3c;0.015% Mg, the remainder consisting of Fe and smelting-related impurities.

Titanium-free alloy

The invention relates to a nickel-chromium-aluminum-iron alloy, comprising (in wt %) 12 to 28% chromium, 1.8 to 3.0% aluminum, 1.0 to 15% iron, 0.01 to 0.5% silicon, 0.005 to 0.5% manganese, 0.01 to 0.20% yttrium, 0.02 to 0.60% titanium, 0.01 to 0.2% zirconium, 0.0002 to 0.05% magnesium, 0.0001 to 0.05% calcium, 0.03 to 0.11% carbon, 0.003 to 0.05% nitrogen, 0.0005 to 0.008% boron, 0.0001 to 0.010% oxygen, 0.001 to 0.030% phosphorus, max. 0.010% sulfur, max. 0.5% molybdenum, max. 0.5% tungsten, the remainder nickel and the common contaminants resulting from the process, wherein the following relations must be satisfied: 7.7C&#x2212;x&#xb7;a&#x3c;1.0, wherein a=PN if PN&#x3e;0 or a=0 if PN&#x2266;0. Here, x=(1.0 Ti+1.06 Zr)/(0.251 Ti+0.132 Zr), PN=0.251 Ti+0.132 Zr&#x2212;0.857 N, and Ti, Zr, N, and C are the concentration of the respective element in mass percent.

Nickel&#x2014;chromium&#x2014;iron&#x2014;aluminum alloy having good processability

A nickel-chromium-cobalt-molybdenum alloy includes (in weight %) Cr 21-23%, Fe 0.05-1.5%, C 0.05-0.08%, Mn&#x2266;0.5%, Si&#x2266;0.25%, Co 11-13%, Cu&#x2266;0.15%, Mo 8.0-10.0%, Ti 0.3-0.5%, Al 0.8-1.3%, P&#x3c;0.012%, S&#x3c;0.008%, B&#x3e;0.002-&#x3c;0.006%, Nb&#x3e;0-1%, N&#x2266;0.015%, Mg&#x2266;0.025%, Ca&#x2266;0.01%, V 0.005-0.6%, optionally W in contents between 0.02-max. 2%, Ni rest as well as smelting-related impurities, in the form of tubes, sheets, wire, bars, strips or forgings, wherein the alloy satisfies the following formula: X3=5&#x2212;50, wherein and X1=C+5N and X2=0.5Ti+Nb+0.5 V.

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Duesseldorf, Germany

Jutta Kloewer