EP0890652A2 - Composant résistant à l'usure, préparé par fusion de métal - Google Patents

Composant résistant à l'usure, préparé par fusion de métal Download PDF

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Publication number
EP0890652A2
EP0890652A2 EP98890195A EP98890195A EP0890652A2 EP 0890652 A2 EP0890652 A2 EP 0890652A2 EP 98890195 A EP98890195 A EP 98890195A EP 98890195 A EP98890195 A EP 98890195A EP 0890652 A2 EP0890652 A2 EP 0890652A2
Authority
EP
European Patent Office
Prior art keywords
particles
melt
matrix
wear
metallic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP98890195A
Other languages
German (de)
English (en)
Other versions
EP0890652A3 (fr
Inventor
Bernhard Dipl. Ing. Feistritzer
Karl Heinrich Dipl. Phys. Ing. Schröder
Michael Dr. Windhager
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eisenwerk Sulzau-Werfen R and E Weinberger AG
Original Assignee
Eisenwerk Sulzau-Werfen R and E Weinberger AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eisenwerk Sulzau-Werfen R and E Weinberger AG filed Critical Eisenwerk Sulzau-Werfen R and E Weinberger AG
Publication of EP0890652A2 publication Critical patent/EP0890652A2/fr
Publication of EP0890652A3 publication Critical patent/EP0890652A3/fr
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/10—Alloys containing non-metals
    • C22C1/1036—Alloys containing non-metals starting from a melt

Definitions

  • the invention relates to a component, tool body or the like from one wear-resistant, metallurgically manufactured material with a Microstructure consisting of a metallic matrix and embedded in it Grains or particles from at least one metallic compound, namely from Carbide and / or nitride and / or carbonitride and / or boride and / or oxide. Furthermore
  • the invention comprises a method for the production of a metallurgical melt Material for components, tool bodies and parts subject to wear the like, the microstructure of which is embedded and embedded in a metallic matrix Has grains or particles of at least one metallic compound.
  • the invention also relates to a device for producing components, Tool bodies and the like with high proportions of metallic Connections in a metallic matrix of the material as well as a use the device for the production of rollers.
  • Metallic connections are connections between at least one metallic and at least one non-metallic element, usually have one great hardness, possibly over 2000 HV and a high melting point, possibly above 3000 ° C and can therefore with increasing proportions in one Matrix improve the wear resistance of the material thus constructed.
  • the using such hard powder manufactured sintered body, which is advantageous as a cutting tip as wearing parts highest demands and the like tool components use find, but are limited in their dimensions, require a complex Manufacture and have high material brittleness.
  • Connections of metallic with non-metallic elements in one Metallic matrix can also be melt metallurgically Elimination from a melt are formed when alloying and / or Cooling and solidification of an alloyed metal melt in this Solubility product of two mutually affine elements one for them characteristic value and so-called primarily excreted Metallic connections are created, which are stored and ultimately in turn improve the wear resistance of the material.
  • the most important materials with high cutting edge stability and wear resistance represent the ledeburitic steels, especially the high-speed steels.
  • Components or cutting and forming tools made of these steels in which structure in a metallic matrix with high hardness carbides or Carbide grains to an extent of at least 5% by volume and usually less than 25% by volume have been in use for a long time and form in it State of the art.
  • high-speed steel alloys are used usual compositions mostly produced by melt metallurgy and contain in addition to carbon with concentrations up to approx.
  • the concentration of the respective metallic alloy elements and that of carbon in the To precisely match the melt with regard to their activity and affinity to one another, in order to increase wear resistance as much as possible Carbide content with small carbide grain size in the solidified part or primary material reach and on the other hand with this high carbide content another to ensure sufficient hot formability of the material.
  • US-3,929,471 is a high-speed steel with a high Wear resistance known, which with a structure made of an iron matrix has stored primary vanadium-niobium mixed carbides.
  • a vanadium-niobium mixed carbide form is chosen because it is this metallic connection with the same density as the melt has.
  • a production of tool bodies, their central and surface area should have different properties, for example cold rolling according to US 4,484,959 in such a way that on a low alloy Structural steel core a hard layer of high-speed steel, preferably with the Alloy elements carbon, chromium and tungsten or chromium and tungsten, is applied, a powder metallurgical application by welding, in particular with a plasma arc or laser torch.
  • a composite roller is known from DE-A-4 019 845, which one preferably outer layer created by an electroslag welding process or working position with compressive stresses.
  • All components, tool bodies or similar plant as well Machine components made of a wear-resistant, melt metallurgical manufactured material with embedded grains or particles from at least A metallic connection has the disadvantages in common that on the one hand in the areas subject to wear the concentration of Hard material particles in the matrix are limited for manufacturing reasons and on the other hand the different mechanical requirement profile for the Component cannot be adequately met. It is also justified by the fact that the density of the To adjust or adapt the connection to the density of the matrix metal in order to consistently set a homogeneous distribution of the connections in the material. For components and tool bodies, this homogeneous structure can be considered with regard to their local demands are often not very effective. For example, a Roller or tube in the areas that are subject to wear have a high concentration of hard material particles in the material, whereas in the segments that absorb the bending or torsional stresses Hard material particles should be kept low.
  • a high, certain value is due to procedural or manufacturing reasons exceeding concentration of grains or particles of metallic Compounds in molten metals disadvantageous.
  • the pourability is the Melt with increasing proportion of solid particles impaired, whereby Manufacturing problems for the primary material or the components arise, on the other hand can, due to the decreasing solubility product, when cooling down Solidification temperature the primarily excreted metallic compounds or connecting parts continue to grow or crystallize together, resulting in Inhomogeneities or places of particular brittleness in the material leads.
  • the invention seeks to remedy the problem and presents the disadvantages to eliminate the generic state of the art and to improve components, Tool body and the like and an advantageous method with a Specify device for their manufacture.
  • This object is achieved in that at least in the (the) wear area (s) of the part or body of the material or its structure proportionally at least to 10% by volume, preferably at least 15% by volume, in particular over 22% by volume, by one or more Compound (s) whose metallic part consists of at least one element from the Groups IV A and V A of the periodic table exist, is formed and Compound (s) has a different density compared to the matrix (exhibit).
  • Non-metals can form hard and high-melting compounds, which at Above 10 vol .-% the wear resistance of a material jumped increase.
  • These metals also have a high affinity for carbon, Nitrogen, boron and oxygen, so that their compounds also in a melt or matrix, which has a low concentration of the above non-metallic elements has high resistance.
  • This allows the matrix composition largely independently chosen and the other requirements for the part be adjusted.
  • the metal component of the Connection from several elements can be formed by alloying and thereby the density of the connections is adjustable. Even the configuration the particle is alloy-based, as was found, about its atomic structure can be influenced, whereby the packing of the particles in the matrix and thus the mechanical properties of the material can be improved.
  • the difference in density between the compound (s) and the matrix is at least 21 kg / m 3 , preferably at least 61 kg / m 3 , in particular at least 101 kg / m 3 , because this gives good wear properties in the work zones of the part with high homogeneity are reachable. It is furthermore advantageous if the proportion of grains or particles of the connection (s) is increased in the area of the component's wear.
  • the average diameter of the grains or particles of the compound (s) in the matrix less than 200 microns, preferably less than 50 microns, in particular less than 20 ⁇ m.
  • the matrix is formed by an iron-based alloy, alloying largely independent of the metallic connections, preferred conditions for thermal tempering of the part created become. This means that even high matrix hardnesses can be achieved, which is the area of application of Parts according to the invention significantly expanded.
  • the matrix is made of a nickel base or cobalt base, special ones are Corrosion advantages and high heat resistance values of the material can be achieved.
  • the procedural object of the invention is achieved in that in a Molten metal Grains or particles of at least one compound whose metallic part from at least one element from groups IV A and V A des Periodic table exists and a different in comparison with the melt Has density, introduced or formed in this by reaction and may be concentrated in sub-areas, with a proportion of at least 10 Vol .-% of at least one compound, whereupon the melt is allowed to solidify.
  • a concentration of the particles or Particles in the melt are caused by centrifugal acceleration high proportions of hard material particles in the matrix can be achieved in a particularly simple manner. Even with small differences in density of the melt and hard material particles due to a technically easy to achieve high centrifugal acceleration a rapid particle movement can be effected.
  • the quickest possible Particle enrichment, if necessary with mutual support of the same, is in the Important with regard to the solidification progress of the residual melt.
  • the particles of the metallic compound (s) can have high mechanical properties, especially toughness component or tool zones subject to abrasion are improved, if the particles of the metallic compound (s) have a grain diameter or a grain size of at most 200 microns introduced into the melt or are formed, it being advantageous if a proportion of the compound particles in the zone of the body or component that is particularly subject to wear of at least 10% by volume, preferably of at least 15% by volume, in particular of more than 22 vol .-% is set.
  • a device for the production of components, Tool bodies and the like system components is thereby characterized in that the mold (s) can be rotated at such a speed is (are) that the inside or brought into it, if necessary alloyed metal melt containing at least 10% by volume of grains or particles a combination of carbon and / or nitrogen and / or carbon and Nitrogen and / or boron and / or oxygen, with one or more elements from groups IV A and V A of the periodic table in comparison with the Molten metal of different density of such a radial acceleration are subject to a disintegration and consequently a concentration of Connection particles in the intended for high wear Components or tool parts are made.
  • Such a device makes it possible to remove the particles of the metallic Connection if these are heavier than the matrix melt, outside, or if these are easier to concentrate inside. It can thus advantageously Component or tool body at its local wear be adjusted.
  • rollers with high Hard material concentration in the area of the bale surface can be advantageous for both a deformation of metallic materials, preferably with increased Temperature, as well as for crushing rock such as lava, granite, lime or valuable rock can be used.
  • FIG. 2 shows carbide grains produced in this way. After tempering by means of a heat treatment matched to a hardenable alloy of the matrix, fine, so-called secondary carbides can also be formed in this in addition to the primarily precipitated carbides, as can be seen from FIG. 3 in the area of a transition zone of the particle concentration.
  • a melt with, in% by weight, 0.02 C, 0.85 Si, 0.35 Mn, 0.80 Cr, 0.96% Ni, 2.1 Mo, 12.2% V was in an induction furnace at a temperature of 1595 ° C by conventional carburizing agents to a total carbon content of 2.85 % Carburized.
  • Cast iron pipes were then manufactured the centrifugal casting process with a centrifugal acceleration of 95 times that Acceleration due to gravity.
  • the cast iron pipes which after the manufacture of a Subjected to heat treatment had one in the area of the inner surface Concentration of 39% by volume of vanadium carbides in a viscous Matrix, the matrix on the outer surface of the tube being essentially carbide-free Template.
  • the pipes were used for the removal of granulated slag in one Copper smelting plant used, its durability up to the bottom Scrubbing compared to carbide-free pipes was twelve times.
  • Squeeze plates were sand-cast with slightly exothermic molding material an alloy of the working zone of 3.81% C, 0.40% Si, 0.82% Mn, 14.2% Cr, 0.8% Mo, 18.2% Nb + Ta, 1.4% V, balance iron and accompanying elements Work surface aligned downwards, machined by grinding and thermally tempered. These plates were used in practice at a shredding of lava and limestone as well as one Rock processing in quartz mining. Due to a homogeneous and up to 46 vol .-% and higher-reaching amount of carbide in fine configuration in a hardenable matrix In the area of the work surface, the durability of such crusher components could be increased be significantly increased.
  • Titanium vanadium carbonitrides was introduced Titanium vanadium carbonitrides. This alloy was used for the nuclear industry Centrifugal cast iron pipes manufactured with high internal wear. A Testing the pipes, which have high proportions of a in the area of the inner surface Had Ti-V connection and the determination of the significantly reduced Wear behavior led to an extension of the inspection period 3 times.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Drilling Tools (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
EP98890195A 1997-07-10 1998-07-03 Composant résistant à l'usure, préparé par fusion de métal Ceased EP0890652A3 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT118597 1997-07-10
AT118597A AT407646B (de) 1997-07-10 1997-07-10 Bauteil aus einem verschleissfesten, schmelzmetallurgisch hergestellten werkstoff
AT1185/97 1997-07-10

Publications (2)

Publication Number Publication Date
EP0890652A2 true EP0890652A2 (fr) 1999-01-13
EP0890652A3 EP0890652A3 (fr) 2001-08-22

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP98890195A Ceased EP0890652A3 (fr) 1997-07-10 1998-07-03 Composant résistant à l'usure, préparé par fusion de métal

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EP (1) EP0890652A3 (fr)
AT (1) AT407646B (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015116520B4 (de) 2015-09-29 2017-11-30 Thyssenkrupp Ag Vorrichtung und Verfahren zur Herstellung eines rotationssymmetrischen, hohlen, metallischen Werkstücks

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3929471A (en) * 1971-12-22 1975-12-30 Hitachi Ltd High speed steel having high wear-resistance
US4089466A (en) * 1977-03-30 1978-05-16 Lomax Donald P Lining alloy for bimetallic cylinders
US4399198A (en) * 1981-07-20 1983-08-16 Lomax Donald P Lining alloy for bimetallic cylinders
DE3237985A1 (de) * 1982-02-26 1983-09-22 Hitachi Metals, Ltd., Tokyo Verschleissfeste gusseisenlegierung
JPH0472034A (ja) * 1990-07-09 1992-03-06 Sumitomo Metal Ind Ltd 形鋼圧延ロール用スリーブとその製造方法
US5246056A (en) * 1989-08-21 1993-09-21 Bimex Corporation Multi carbide alloy for bimetallic cylinders
JPH05320818A (ja) * 1992-05-19 1993-12-07 Kubota Corp 耐摩耗スリーブロール

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3305357B2 (ja) * 1992-05-21 2002-07-22 東芝機械株式会社 耐食・耐摩耗性に優れた合金およびその製造方法ならびにその合金製造用材料

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3929471A (en) * 1971-12-22 1975-12-30 Hitachi Ltd High speed steel having high wear-resistance
US4089466A (en) * 1977-03-30 1978-05-16 Lomax Donald P Lining alloy for bimetallic cylinders
US4399198A (en) * 1981-07-20 1983-08-16 Lomax Donald P Lining alloy for bimetallic cylinders
DE3237985A1 (de) * 1982-02-26 1983-09-22 Hitachi Metals, Ltd., Tokyo Verschleissfeste gusseisenlegierung
US5246056A (en) * 1989-08-21 1993-09-21 Bimex Corporation Multi carbide alloy for bimetallic cylinders
JPH0472034A (ja) * 1990-07-09 1992-03-06 Sumitomo Metal Ind Ltd 形鋼圧延ロール用スリーブとその製造方法
JPH05320818A (ja) * 1992-05-19 1993-12-07 Kubota Corp 耐摩耗スリーブロール

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 016, no. 277 (C-0954), 22. Juni 1992 (1992-06-22) & JP 04 072034 A (SUMITOMO METAL IND LTD), 6. März 1992 (1992-03-06) *

Also Published As

Publication number Publication date
AT407646B (de) 2001-05-25
EP0890652A3 (fr) 2001-08-22
ATA118597A (de) 2000-09-15

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