Disclosed in this application are a large-sized high-Nb superalloy ingot and a smelting process thereof. The smelting process includes: vacuum induction melting to prepare a plurality of vacuum induction melting ingots with the same composition which are used for preparing electroslag electrodes with the same number as the vacuum induction melting ingots for use in electroslag remelting, preparing a consumable electrode from the prepared consumable electroslag electrodes, and performing vacuum consumable arc remelting for a plurality of times by using the consumable electroslag electrodes as raw material. A large-sized high-Nb superalloy ingot having a weight of 15 tons or above and a diameter of 800 mm or above can be prepared from such process.

Method of producing a cold drawn wire from a particle metallurgy steel includes the following steps:-preparation of a bulk of molten metal including in weight %: C 0.03-0.15, Si 0.01-1.2, Mn 0.1-1.5, Cr 15-20, Ni 540, Al 0.5-1.5, optionally max 2 of elements chosen from the group of N, P, S, Cu, Co, W, Mo, Nb, Ti, Zr, Ta, B, Be, Bi, Se, Mg, Ca, Hf, V, and REM, and, using electro slag refining and atomising to provide a metal powder; filling and sealing a capsule with the metal powder; compacting the capsule to provide a full density billet; hot working the billet and finishing by wire rolling; cold drawing the annealed wire with at least 30% area reduction.

The invention relates to a mould for the manufacturing of mould steels in an inert gas or a pressurized electro slag re-melting apparatus. The mould comprises a non-rectangular and non-circular inner copper sleeve having a width, w, of 1000-2500 mm and a thickness, t, of 700-1250 mm, wherein the short sides in the thickness direction of the copper sleeve at least partly have sections with curved surfaces and wherein the long sides in the width direction at least partly have sections with curved surfaces.

The invention relates to a mould for the manufacturing of mould steels in an inert gas or a pressurized electro slag re-melting apparatus. The mould comprises a non-rectangular and non-circular inner copper sleeve having a width, w, of 1000-2500 mm and a thickness, t, of 700-1250 mm, wherein the short sides in the thickness direction of the copper sleeve at least partly have sections with curved surfaces and wherein the long sides in the width direction at least partly have sections with curved surfaces.

Disclosed in this application are a large-sized high-Nb superalloy ingot and a smelting process thereof. The smelting process includes: vacuum induction melting to prepare a plurality of vacuum induction melting ingots with the same composition which are used for preparing electroslag electrodes with the same number as the vacuum induction melting ingots for use in electroslag remelting, preparing a consumable electrode from the prepared consumable electroslag electrodes, and performing vacuum consumable arc remelting for a plurality of times by using the consumable electroslag electrodes as raw material. A large-sized high-Nb superalloy ingot having a weight of 15 tons or above and a diameter of 800 mm or above can be prepared from such process.

Disclosed in this application are a large-sized high-Nb superalloy ingot and a smelting process thereof. The smelting process includes: vacuum induction melting to prepare a plurality of vacuum induction melting ingots with the same composition which are used for preparing electroslag electrodes with the same number as the vacuum induction melting ingots for use in electroslag remelting, preparing a consumable electrode from the prepared consumable electroslag electrodes, and performing vacuum consumable arc remelting for a plurality of times by using the consumable electroslag electrodes as raw material. A large-sized high-Nb superalloy ingot having a weight of 15 tons or above and a diameter of 800 mm or above can be prepared from such process.

The invention relates to a remelting plant comprising a furnace chamber (50), which can be positioned over a crucible (60) of a melting station, an electrode rod (48), which by way of a lead-through (52) can be inserted or is inserted in the furnace chamber (50), in order to contact a consumable electrode (58), and a guide column (30), on which an electrode rod carriage (40) that is fixed-ly connected to the electrode rod (48) is guided in an axially movable manner, in order to move the electrode rod (48) in relation to the furnace chamber (50), and on which a chamber carriage (38), which is connected or can be connected to the furnace chamber (50), is guided in an axially movable manner, in order to move the furnace chamber (50). The guide column (30) is articulatedly connected at a first end to a rotary column (18) such that the guide column (30) can be inclined in re-lation to the rotary column (18) and can be rotated together with the rotary column (18) about the axis of rotation (24) of the rotary column (18). The guide column (30) has in the region of the first end a weighing device (36), which is preferably attached to the rotary column (18).

The invention relates to a remelting plant comprising a furnace chamber (50), which can be positioned over a crucible (60) of a melting station, an electrode rod (48), which by way of a lead-through (52) can be inserted or is inserted in the furnace chamber (50), in order to contact a consumable electrode (58), and a guide column (30), on which an electrode rod carriage (40) that is fixed-ly connected to the electrode rod (48) is guided in an axially movable manner, in order to move the electrode rod (48) in relation to the furnace chamber (50), and on which a chamber carriage (38), which is connected or can be connected to the furnace chamber (50), is guided in an axially movable manner, in order to move the furnace chamber (50). The guide column (30) is articulatedly connected at a first end to a rotary column (18) such that the guide column (30) can be inclined in re-lation to the rotary column (18) and can be rotated together with the rotary column (18) about the axis of rotation (24) of the rotary column (18). The guide column (30) has in the region of the first end a weighing device (36), which is preferably attached to the rotary column (18).

A melting vessel for performing an electro-slag melting method and such a method are presented. Measuring devices measuring a temperature at different heights allow conclusions about position and height of a slag zone in the melting vessel during the method.

A melting vessel for performing an electro-slag melting method and such a method are presented. Measuring devices measuring a temperature at different heights allow conclusions about position and height of a slag zone in the melting vessel during the method.