JP2002053921A - Use of copper-nickel alloy - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a material exhibiting excellent weldability as well as good thermomechanical properties and used as a crucible for a melting device and a remelting device. SOLUTION: A copper alloy having a composition containing 0.2 to 1.5% Ni, at least one kind of element selected from the groups consisting of phosphorous, aluminum, manganese, lithium, calcium, manganese, silicon and boron of 0.002 to 0.12%, and the balance copper with impurities caused by the production is used as the material in an unhardened state, e.g. for the production of a crucible for a melting device and a remelting device. For intentionally improving its strength, the copper alloy may contain zirconium of <=0.3% as well.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates, on the one hand, to copper alloys,
It relates to the use as raw material in the manufacture of containers for holding metal melts, for example crucibles for melting and remelting equipment.

On the other hand, the invention relates to a method for producing a container made of a copper-nickel alloy which can contain a metal melt.

[0003]

2. Description of the Prior Art Melting and remelting methods are known in the art. They have been used to improve the quality of steel and superalloys based on iron, nickel or cobalt. Another area of application is the production of non-ferrous metals such as tantalum, titanium, molybdenum or zirconium.

[0004] Copper and copper alloys having high thermal conductivity are generally suitable as materials for manufacturing crucibles.

[0005] Seamless, welded or otherwise manufactured crucibles generally have a rounded tubular or rectangular basic shape. However, those having a polygonal or square basic shape are also used.
In addition, individual shapes are used which match the final shape of the structure to be manufactured, for example the crankshaft and the pressure vessel.

[0006] Containers for holding the metal melt, for example crucibles, generally have a length of up to 4 m and a diameter of up to 1.5 m.

[0007] In melting and remelting equipment, the crucible is generally surrounded by a cooling jacket which serves to carry out the process heat. In this case, the cooling jacket itself may be formed as a steel structure. Alternatively, structures are also conceivable in which the cooling water guideway is integrated directly into the wall of the copper crucible in the form of slits or cooling perforations.

From US Pat. No. 2,155,405, 0.25-3% nickel, 0.05-0.6%
Copper alloys containing phosphorus and the balance of copper are known. This alloy devised for the conductor has a conductivity of IACS of 67% and a relatively high tensile strength.

Further, European Patent Application Publication (A1) No. 2
No. 49,740 discloses a hardenable copper alloy composed of 0.2 to 1.2% nickel and 0.04 to 0.25% phosphorus. This alloy is likely to be used as a material for manufacturing a continuous casting mold for continuous casting of refractory metals. This material has a hardness of 115 or more HB 2.5 / 62.
5 has been reached.

[0010]

It is an object of the present invention to provide a material having good thermomechanical properties as well as excellent weldability for use as crucibles in melting and remelting equipment. It is.

[0011] Furthermore, a suitable method for producing a container composed of possibly many parts for melting a metal should be provided.

[0012]

The object is, on the one hand, to provide for 0.2 to 1.5% Ni, 0.002 to 0.12%.
% Of at least one element from the group consisting of phosphorus, aluminum, manganese, lithium, calcium, magnesium, silicon and boron, a copper alloy consisting of a balance of copper including impurities resulting from the production, The problem is solved by using the uncured material as a material for the production of crucibles for filling containers, for example melting and remelting equipment.

The alloy to be used according to the invention is preferably 0.6-1.3% nickel and 0.01-0.0%.
It contains 6% of at least one element selected from the group consisting of boron, magnesium and phosphorus, and the balance of copper including impurities due to production.

In order to improve the strength intentionally, it is advantageous to add 0.01 to up to 0.3% of zirconium to the alloy.

[0015] The method part of the above-mentioned problem is that of claim 5
7 is solved.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C22F 1/00 650 C22F 1/00 650F 661 661Z 681 681 681 685 685Z 694 694A (72) Inventor Deirk Rohde Germany Federal Republic, 49088 Osnabrück, Rion-Fuichtvoranger-Strase, 5 (72) Inventor Hans-Giünter-Woubker Germany, 49565 Bramsier, Zemelweissstraße, 9

Claims (7)

[Claims] 1. The method according to claim 1, wherein the Ni content is 0.2 to 1.5%.
A metal melt comprising 0.12% of at least one element of the group consisting of phosphorus, aluminum, manganese, lithium, calcium, magnesium, silicon and boron, the balance of copper including impurities resulting from the production; Container to put,
For example, copper alloys as uncured materials used in the manufacture of crucibles for melting and remelting equipment. 2. Copper alloy according to claim 1, wherein the nickel content is 0.6-1.3% and the content of the elements boron, magnesium and / or phosphorus is 0.01-0.06%. 3. The copper alloy according to claim 1, wherein the nickel content is 1.0-1.3% and the phosphorus content is 0.01-0.03%. 4. Copper alloy according to claim 1, which additionally contains up to 0.3% of zirconium. 5. The method for producing a metal melting container from a copper alloy according to claim 1, wherein the alloy is cooled and set in ambient air which is stationary after hot forming. The above method, characterized in that: 6. The method of claim 5, wherein the alloy is cold formed by at least 10% after hot forming. 7. The cold-forming and subsequent welding of the alloy present in the hot-deformed state is carried out only to such an extent that the strength and the electrical conductivity of the weld seam are not more than 15% of the corresponding property values of the base material. 7. The method according to claim 6, wherein the two are adjusted so as not to shift.