SE467396B - Metallic wire - Google Patents

Abstract

Metallic wire, which comprises a highly alloyed, metallic material comprising high contents of alloying substances intended to produce special material properties in the said metallic material, such as a high degree of corrosion resistance, a high degree of resistance to oxidation at high temperatures or a high degree of hardness and a high degree of resistance to abrasion, where the said highly alloyed material is applied, as an essentially concentric layer, by casting a metal smelt on a thread-like core, which layer is of such a thickness that the cross section of the layer constitutes a substantial part of the total cross section. The wire is distinguished especially by the fact that the composition of the highly alloyed material constituting the said layer is principally selected with regard to the material properties relating to the use of the material and, in this connection, without regard to the workability properties, in particular the heat workability properties, with the alloying substance content of the material in the said layer being selected to be substantially higher than would otherwise be the case, and by the fact that at least one concentric layer is constituted in accordance with one of the alternatives a) - e), as follows: a) The layer consists of stainless steel containing, in % by weight, 20-40% Cr, up to 30% Ni, 2-8% Mo, up to 0.4% N, and C and other alloying substances essentially in normally occurring contents, with the remainder being Fe and normally occurring impurities. b) The layer consists of stainless, precipitation- hardening steel containing, in % by weight, 0.03-0.15% C, up to 0.8% Mn, up to 0.8% Si, 15-18% Cr, 4-9% Ni, up to 2% Al, up to 3% Mo, up to 0.4% N, and other alloying substances essentially in normally occurring contents, with the remainder being Fe and normally occurring impurities. c) The layer consists of a material which is resistant to high-temperature oxidation and which contains, in % by weight, up to 1.2% C, up to 60% Cr, up to 50% Ni, up to 4% Si, up to 7% Al, up to 2% Ti, up to 8% Co, up to 2% rare earth metals, and other alloying substances essentially in normally occurring contents, with the remainder being Fe and normally occurring impurities. d) The layer consists of steel, such as stainless steel or carbon steel, which exhibits very good cuttability and which contains, in % by weight, 0.8-1.2% S or up to 0.8% Pb, with, where appropriate, the Mn content preferably having been lowered to a certain degree as a compensation for high S contents. e) The layer consists of high speed steel containing, in % by weight, 0.7-2% C, up to 6% Cr, up to 10% Mo, up to 16% W, up to 3% V, up to 15% Co, and other alloying substances in normally occurring contents, with the remainder being iron and normally occurring impurities.

Description

467 596 are intended to provide special material properties of said metallic materials, such as high corrosion resistance, high resistance to oxidation at high temperatures or high hardness and abrasion resistance density, said high alloy material being as a substantially concentric layer applied by a continuous casting of metal a filamentous core, which layer has such a thickness that the cross section of the layer constitutes a substantial part of the total cross section.

'Advice according to The invention is characterized in particular by the fact that the composition of the high-alloy material constitutes said layer is chosen mainly with regard to the material properties with respect to the material and herewith without regard to the workability properties, mainly the hot workability properties, the alloy content of the material in said layer being substantially higher. otherwise would be the case, and by the fact that at least one concentric layer is present according to any of the alternatives a) - e) as follows: a) The layer consists of stainless steel containing, in% by weight 22-40% Cr, up to 30% Ni, 2-8% Mo, up to 0.4% N, C and other alloying substances essentially in normally occurring concentrations and the rest Fe together with normally occurring impurities. b) The layer consists of stainless precipitation hardening steel containing, in% by weight 0.03-0.15% C, llpp to 0.8% Mn, up to 0.8% Si, 15-18% Cr, 4-9% Ni, up to 2% Al, up to 3% Mo, up to 0.4% N, other alloying substances essentially in normal levels and the rest Fe together with normally occurring impurities. , c) The layer consists of a material against high temperature oxidation containing, in% by weight up to 1.2% c, up to 60% cr, up to 50% Ni, up to 4% si, s-7% Al, up to 2% Ti, up to 8% co, up to 2% rare earth metals, other alloying elements essentially in normal levels and the remainder Fe together with normally occurring impurities. d) The layer is made of steel, such as stainless steel or carbon steel, showing very good machinability, irmetllårldde, in weight%, 0.8-1.2% S or up to 0.8% Pb, where, where applicable, preferably a certain amount of MN content, was undertaken as compensation for high S levels. e) The layer consists of high-speed steel containing, in% by weight, 0.7-2% C, up to 6% Cr, up to 10% Mo, up to 16% W, up to 3% V, up to 15% Co , other alloying elements in normally occurring concentrations and the rest Fe together with normally occurring impurities. 4-67 596 The invention is described in more detail below in connection with exemplary embodiments.

Thus, within the scope of the invention, a number of embodiments may be present. It is desirable that a wire-shaped core be present. On said core, one or more layers of high-alloy material can be applied by casting.

Said layer has such a thickness that the layer constitutes a substantial part of the total cross-section. According to. preferred embodiments, said layer constitutes 30-90% of the total cross-section. It should be pointed out that a layer of the wire can be obtained by one or more casting operations. one embodiment, the wire comprises, at least at its longitudinal circumferential sheath surface, a conoentric layer of highly alloyed material applied by casting.

According to. a preferred embodiment in many cases, the wire is made of duplex in terms of its composition and hereby comprises a core of a certain material and a concentric layer.

Of course, a number of combinations of core and one or more layers are conceivable in terms of material composition. Thus, combinations are conceivable where a core is present, which consists of a high-alloy material, for example of substantially the same kind as the material of at least one conoentric layer. Combinations are also conceivable where a core is present, which consists of a simple, inexpensive material, such as a carbon steel or a substantially unalloyed and low-carbon steel of, for example, a hardened steel type.

Said casting may be performed on several Thus, the casting may be performed either as direct casting substantially according to. Swedish patent 8003487-9 of a melt, in which the metal melt is caused to flow out of a container's outlet hole for melting and is thereby caused to form an unbroken filamentary body by being stabilized by means of a wire continuously extending through the outlet hole, after which the wire indicating, unbroken outgrowths. of melt is caused to solidify around the wire and is collected, whereby a wire is formed comprising a core corresponding to the stabilizing wire and a concentric, outer layer corresponding to the melt, or as so-called where a wire is passed through a metal melt, a layer of the melt being solidified by freezing on the wire, forming a wire comprising a core corresponding to the melt passing the wire and a concentric outer layer corresponding to the melt.

In all cases, viJct-% is used here to indicate concentrations for composition declarations. By the term "up to x%" is meant concentrations from extremely low levels corresponding to substantially absent or only traces of the substance in question up to x%.

According to. a embodiment of wire according to the invention contains at least one concentric layer of stainless steel containing in% by weight, 20 - 40% Cr, up to 30% Ni, 2 - 8% Mo, up to 0.4% N, C and other alloying elements substantially in normally occurring contents and the remainder Fe together with normally occurring impurities. Materials of this kind are primarily intended for highly corrosive environments.

As an example of stainless steel linked to be included as a high-alloy material in a wire according to the invention is precipitation hardening steel with 0.03 - 0.5% C, up to 0.8% Mn, up to 0.8% Si, 15-18% CR, 4-9% Ni, up to 2% Al, up to 3 % Mo, up to 0.4,% N, other alloying salts substantially in normally occurring concentrations and the rest Fe together with normally occurring impurities.

According to. another embodiment of wire according to There is at least one concentric layer of a material resistant to high temperature oxidation containing by weight up to 1.2% C, up to 60% Cr, up to 50% Ni, up to 4% Si, up to 7% Al, up to 2% Ti, up to 8% Co, up to 2% rare earth metals, other alloy compounds substantially in normal levels and the rest Fe together with normally occurring impurities. Materials of this kind include so-called kanthalnwaterial, where sntipesksamsnsätmingärdwac, zz% c: r, swaiochihuv mainlyrsstsn Fe together with normally occurring pollutants'. In the case of the edge neck material, elevated Ai-hait is conceivable here, such as up to 7%.

According to. a further embodiment of wire according to According to the invention, there is at least one concentric layer of a steel having very good machinability comprising 0.8 - 1.2% S or up to 0.8% Pb. The steel can now be stainless steel, carbon steel or other steel in which good machinability is desired. Through the elevated S- resp. The Pb content is provided with an automatic steel suitable for turning etc. According to a preferred embodiment takes place, such as cosperperusion for high S contents, a certain hm content whereby the content of precipitates can be reduced and whereby the corrosion properties are improved.

Steel of the type referred to here with good machinability is thus highly alloyed with respect to s- resp. Pb-irmetaåll.

According to. another embodiment of wire according to According to the invention there is at least one concentric layer which consists of high-speed steel containing 0.7 - 2% C, upptiilwacr, upptilliomao, up to 1e% w, up:% v, up to 15% Co, other alloying elements in normally occurring contents and the rest Fe together with normal existing pollutants. Wire of this kind is intended for, for example, threaded pins and the like, in which case a core is present, preferably of a tougher material than high-speed steel, such as a carbon steel.

The function of the thread according to the invention should be substantially apparent from the foregoing. According to. the invention can thus, if desired, be made of thread with extremely high alloy content or thread comprising one or more concentric layers with extremely high alloy content, the high alloy material being able to be selected mainly with regard to the material properties regarding the use of the material and not with respect to processing. wherein the alloy content is chosen to be significantly higher than what would otherwise have been the case. By casting, layers of substantial thickness can be applied relatively easily and inexpensively.

Thus, as should be seen above, in a thread according to lippfirmirxgen the previously related problems associated with conventional thread have been largely eliminated.

The invention has been described above in connection with a few different embodiments. Of course, more embodiments and modifications may be "refueled" without departing from the spirit of the invention.

Thus, of course, concentric layers of materials other than those specified here are conceivable, for example tool steel, nickel base alloys and others.

The invention is thus not to be considered limited to the above-mentioned embodiments but can be varied within its scope as indicated by the appended patent fl.

Claims (6)

1. 4-67 396 2. A metallic wire comprising a high alloy metallic material comprising high levels of the alloying elm intended to provide special material properties of said metallic material, such as high corrosion resistance, high resistance to oxidation at high temperatures or high hardness, and the High-alloy materials are applied as a substantially concentric layer by continuous casting of an integral core on a filamentous core, which layer has such a thickness that the cross-section of the layer constitutes a substantial part of the total cross-section, characterized in that the selected mainly with regard to the material properties with respect to the material and thereby without regard to the workability properties, mainly the hot workability properties, whereby the alloy seal content of the material in said layer is chosen substantially higher than that in other case would be the case, as well as the fact that at least one concentric layer is present according to one of the alternatives a) - e) as follows: a) The layer consists of stainless steel containing, in% by weight 22-40% Cr, up to 30 % Ni, 2-8% Mo, up to 0.11% N, C and other alloying elements essentially in normally occurring concentrations and the rest Fe together with normally occurring impurities. b. The layer consists of stainless precipitation hardening steel containing, i 3.% by weight 0.03-0.15% C, up to 0.8% MTI, 'tip' to 0.8% Si, 15-18% Cr, 4. -9% Ni, up to 2% Al, up to 3% Mo, up to 0.4% N, other alloying salts essentially in normal levels and the rest Fe together with normally occurring impurities. c) The layer consists of a material against high temperature oxidation containing, in% by weight up to 1.22; c, up to 60% cr, up to 50% Ni, up to 4% si, s-7% Al, up to 2% Ti, up to 8% cd, up to 2% rare earth metals, other alloy gills essentially in normal existing concentrations and the rest Fe together with normally occurring pollutants. d) The layer is made of steel, such as stainless steel or carbon steel, having a good cutability, containing, in% by weight, 0.8-1.2% S or up to 0.8% Pb, where, where applicable, preferably a certain MN content, was undertaken as a compound for high S levels. in 467 396 e) The layer is made of high-speed steel inlaid, x in viJct-%, 0.7-2% C, up to 6% Cr, up to 10% Mo, up to 16% W, up to 3% V, up to 15% Co, other alloying elements in normally occurring concentrations and the rest Fe together with normally occurring impurities. 2. Wire-like lcravl, characterized in that the said cross-section v) said layer constitutes 30-90% of the total cross-section. 3. The wire mesh is characterized in that near-casting is performed either as direct casting of the melt where the metal melt is caused to flow out of a container outlet hole for melting and thereby formed to form an unbroken wire-shaped body by stabilizing it through a continuous thread. surrounding, unbroken, coiled beam is caused to solidify the lcriiug wire and collected, whereby a wire is formed comprising a core naoizsvararade the stabilizing wire, and a conoentric, layer, mtsvaræade melt, or as so-called dip-forming, in which a wire is passed through a metal melt, whereby a layer of the melt is solidified by freezing on the wire, whereby a u-vein is formed comprising a sensitized wire passing the melt and a concentric, layer corresponding to the melt. 4. A thread-like collar, 2e11er3, characterized in that the thread is duplexed with respect to it and hereby comprises a core of a certain material and a concentric layer. 5. It is advisable to claim 2, 3 or 4, characterized in that a core is present, which consists of a highly alloy material, for example of substantially true kind as the material of at least one concentric layer. Threaded wire mesh, 2, 3 or 1 or 4, characterized in that there is a core which consists of a carbon steel or a substantially unalloyed and low carbon steel of commercial steel type.