CH424434A - Process for the production of hard and wear-resistant armor on large and therefore crack-prone surfaces - Google Patents
Process for the production of hard and wear-resistant armor on large and therefore crack-prone surfacesInfo
- Publication number
- CH424434A CH424434A CH410860A CH410860A CH424434A CH 424434 A CH424434 A CH 424434A CH 410860 A CH410860 A CH 410860A CH 410860 A CH410860 A CH 410860A CH 424434 A CH424434 A CH 424434A
- Authority
- CH
- Switzerland
- Prior art keywords
- hard
- production
- wear
- crack
- metal
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/067—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds comprising a particular metallic binder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/32—Selection of soldering or welding materials proper with the principal constituent melting at more than 1550 degrees C
- B23K35/327—Selection of soldering or welding materials proper with the principal constituent melting at more than 1550 degrees C comprising refractory compounds, e.g. carbides
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12014—All metal or with adjacent metals having metal particles
- Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
- Y10T428/12049—Nonmetal component
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Arc Welding In General (AREA)
- Nonmetallic Welding Materials (AREA)
Description
Verfahren zur Herstellung von harten und verschleissfesten Panzerungen auf grossen und daher rissanfälligen Flächen Es ist bekannt, dass man Hartmetallkarbide mit oder ohne übliche Zusätze an Hilfsmetall vorteilhaft in einer inerten Schutzgasatmosphäre verschweisst und dass mit diesem Verfahren insbesondere bei Aufschweissungen zur Herstellung von Werkzeugen mit schneidenden Kanten hervorragende Ergebnisse erzielt werden. Bei diesem bekannten Verfahren kön nen auch Hartmetallkarbide enthaltende Stäbe als Zusatzwerkstoffe Verwendung finden.
Die Herstellung verschleissfester Flächen blieb hingegen bisher auf relativ kleine Flächen be schränkt, also auf Flächen im Ausmass von wenigen Quadratzentimetern, weil Aufpanzerungen auf grös- seren Flächen sehr rissanfällig sind und bei Stossbe- anspruchungen zum Abblättern neigen.
Die vorliegende Erfindung befasst sich nun mit einer Verbesserung dieses bekannten Verfahrens, durch welche auch die Aufpanzerung grösserer Flä chen, insbesondere die Aufpanzerung von Rundkör pern, vollkommen homogen und rissfrei ermöglicht wird.
Durch Versuche konnte ermittelt werden, dass es für den Zweck der Erfindung in entscheidender Weise auf das Hilfsmetall der zur Verwendung kom menden Zusatzwerkstoffe aus Sinterhartmetall an kommt. Für die Herstellung dieser Zusatzwerkstoffe muss ein Hilfsmetall Verwendung finden, das aus 5 bis 100 0/o Ni,0 bis 95 0/o Eisen und 0 bis 30 0/o Chrom besteht.
Gegenstand der Erfindung ist somit ein Verfahren zur Herstellung von harten und verschleissfesten Panzerungen auf grossen und daher rissanfälligen Flächen durch Auftragsschweissung in inertem Schutzgas mit Hilfe des elektrischen Lichtbogens un ter Verwendung von Zusatzwerkstoffen aus gesinter tem Hartmetall, das zum überwiegenden Teil aus Hartmetallkarbiden mit einem Anteil von mindestens 50 0/o Wolframkarbid besteht und ferner 5-30 0/o Hilfsmetall enthält, das aus 5 bis 100 0/o Nickel, 0 bis 95 0/o Eisen und 0 bis 30 0/o Chrom besteht.
Ausser Wolframkarbid, das mit einem Anteil von mindestens 50 0/o des Hartmetallkarbides vorhanden sein muss; können als weitere Hartmetallkarbide die Karbide des Molybdäns, Chroms, Tantals, Niobs, Titans, Zirkons o. dgl. in Betracht kommen.
Das Hilfsmetall kann in Form von Nickelpulver, gegebenenfalls in Mischung mit Eisen- und/oder Chrompulver in die zur Herstellung des Zusatzwerk stoffes zu verpressende und zu sinternde Pulvermi schung eingebracht werden.
Es kann aber auch ein Stahlpulver aus einem austenitischen Cr-Ni-Stahl als Hilfsmetall Verwen dung finden.
Die Herstellung der Zusatzwerkstoffe erfolgt zweckmässig in an sich bekannter Weise derart, dass die aus Hartstoffen und Bindemetall bestehende Pul vermischung mit einem organischen Bindemittel, wie z. B. Kunstharz vermischt, zu Stäben stranggepresst und anschliessend bei Temperaturen zwischen 900 und 1300 C gesintert wird.
Beispielsweise wurden mit erfindungsgemäss in Betracht kommenden Schweissstäben aus 85 0/o WC und 15 0/o Ni mit Hilfe des Argonarc-Verfahrens Drahtführungsringe gepanzert. Diese Ringe zeigten nach einer Laufzeit von 478 Stunden noch keine merkbaren Verschleisserscheinungen. Hingegen waren solche Ringe, die mit einem gehärteten Schnittstahl mit 13 0/o Cr und 2 0/o C gepanzert waren, bei Leichen Beanspruchungen schon nach einer Lauf zeit von 334 Stunden vollkommen abgenützt und da mit unbrauchbar.
Bei Verwendung von Kobalt und/oder Eisen als Bindemetall muss unter vergleichbaren Vorausset zungen mit einem um mindestens 20 0/o geringeren Verschleisswiderstand gerechnet werden.
Durch Verwendung erfindungsgemäss in Betracht kommender Zusatzwerkstoffe für die Schweissung in inertem Schutzgas werden Härten von 64 bis 67 Rockwell-C-Einheiten erreicht. Die vorteilhafte Wir kung des Bindemetalls dieser Zusatzwerkstoffe be steht offenbar darin, - dass es beim Schweissen eine zähe Übergangszone zum Grundwerkstoff bildet. Hierdurch wird es möglich, beispielsweise bei der Argonarc-Schweissung auch dickere Lagen in einem Zuge rissfrei aufzubauen. Solche Lagen können eine Dicke von 4 bis 6 mm haben.
Auch das Auftragen mehrerer Schweisslagen übereinander ist rissfrei durchführbar.
Ein besonderer Vorteil der erfindungsgemäss zu verwendenden Zusatzwerkstoffe liegt darin, dass sie z. B. bei der Argonarc-Schweissung eine Härte von 64 bis 67 Rockwell-C-Einheiten unmittelbar ergeben, während bei Verwendung von Sinterhartmetallen z. B. aus WC, jedoch mit Co und/oder Fe als Binde metall beim gleichen Schweissverfahren nur eine Härte von etwa 52 Rockwell-C-Einheiten erreicht wird.
Process for the production of hard and wear-resistant armoring on large and therefore crack-prone surfaces It is known that hard metal carbides with or without the usual additives of auxiliary metal are advantageously welded in an inert protective gas atmosphere and that this process is excellent, especially for welds for the production of tools with cutting edges Results are achieved. In this known method, rods containing hard metal carbides can also be used as filler materials.
The manufacture of wear-resistant surfaces, on the other hand, has so far been limited to relatively small surfaces, i.e. to surfaces of a few square centimeters, because armouring on larger surfaces is very susceptible to cracking and tends to flake off when exposed to impact.
The present invention is now concerned with an improvement of this known method, by means of which the armoring of larger surfaces, in particular the armoring of Rundkör pern, is made completely homogeneous and crack-free.
It could be determined through tests that for the purpose of the invention it is crucial to the auxiliary metal of the additional materials made of cemented carbide to be used. For the production of these additional materials, an auxiliary metal must be used which consists of 5 to 100% Ni, 0 to 95% iron and 0 to 30% chromium.
The subject of the invention is thus a method for the production of hard and wear-resistant armoring on large and therefore crack-prone surfaces by build-up welding in an inert protective gas with the help of the electric arc using additional materials from sintered hard metal, which is predominantly made of hard metal carbides with a proportion of consists of at least 50% tungsten carbide and also contains 5-30% auxiliary metal which consists of 5 to 100% nickel, 0 to 95% iron and 0 to 30% chromium.
Except for tungsten carbide, which must be present in a proportion of at least 50% of the hard metal carbide; The carbides of molybdenum, chromium, tantalum, niobium, titanium, zirconium or the like can be considered as further hard metal carbides.
The auxiliary metal can be introduced in the form of nickel powder, optionally mixed with iron and / or chromium powder, into the powder mixture to be pressed and sintered for the production of the additional material.
However, a steel powder made from an austenitic Cr-Ni steel can also be used as an auxiliary metal.
The production of the additional materials is expediently carried out in a manner known per se in such a way that the powder consisting of hard materials and binding metal is mixed with an organic binder, such as. B. synthetic resin is mixed, extruded into rods and then sintered at temperatures between 900 and 1300 C.
For example, welding rods made of 85 0 / o WC and 15 0 / o Ni were armored with the help of the argon-arc method using welding rods which can be considered according to the invention. After a running time of 478 hours, these rings still showed no noticeable signs of wear. On the other hand, such rings, which were armored with a hardened cutting steel with 13 0 / o Cr and 2 0 / o C, were completely worn out after a running time of 334 hours and therefore unusable when corpses were subjected to stress.
When using cobalt and / or iron as the binding metal, under comparable conditions a wear resistance of at least 20% lower must be expected.
By using filler materials that can be considered according to the invention for welding in inert protective gas, hardnesses of 64 to 67 Rockwell C units are achieved. The beneficial effect of the binding metal of these filler metals is evidently that - it forms a tough transition zone to the base material during welding. This makes it possible, for example, with Argon arc welding, to build up thick layers in one go without cracks. Such layers can have a thickness of 4 to 6 mm.
The application of several welding layers on top of one another can also be carried out without cracks.
A particular advantage of the filler materials to be used according to the invention is that they can be used, for. B. in the argon arc welding a hardness of 64 to 67 Rockwell C units immediately result, while when using cemented carbide z. B. from WC, but with Co and / or Fe as a binding metal in the same welding process only a hardness of about 52 Rockwell C units is achieved.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT293759A AT217818B (en) | 1959-04-18 | 1959-04-18 | Process for the production of hard and wear-resistant surfaces by build-up welding |
Publications (1)
Publication Number | Publication Date |
---|---|
CH424434A true CH424434A (en) | 1966-11-15 |
Family
ID=3542667
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH410860A CH424434A (en) | 1959-04-18 | 1960-04-12 | Process for the production of hard and wear-resistant armor on large and therefore crack-prone surfaces |
Country Status (5)
Country | Link |
---|---|
US (1) | US3109917A (en) |
AT (1) | AT217818B (en) |
CH (1) | CH424434A (en) |
DE (1) | DE1242984B (en) |
GB (1) | GB904652A (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3260579A (en) * | 1962-02-14 | 1966-07-12 | Hughes Tool Co | Hardfacing structure |
US3179787A (en) * | 1962-03-29 | 1965-04-20 | Eutectic Welding Alloys | Carbide welding rod |
US3215510A (en) * | 1963-10-02 | 1965-11-02 | Gen Electric | Alloy |
US3859057A (en) * | 1970-03-16 | 1975-01-07 | Kennametal Inc | Hardfacing material and deposits containing tungsten titanium carbide solid solution |
US4055742A (en) * | 1974-05-21 | 1977-10-25 | Union Carbide Corporation | Hard facing rod |
US4312894A (en) * | 1974-05-21 | 1982-01-26 | Union Carbide Corporation | Hard facing of metal substrates |
US4161207A (en) * | 1976-05-28 | 1979-07-17 | Eutectic Corporation | Production of carbide laden consumables in a graphite mold |
US4650722A (en) * | 1980-06-13 | 1987-03-17 | Union Carbide Corporation | Hard faced article |
US4443255A (en) * | 1980-06-13 | 1984-04-17 | Union Carbide Corporation | Hard facing of metal substrates |
DE3511220A1 (en) * | 1985-03-28 | 1986-10-09 | Fried. Krupp Gmbh, 4300 Essen | HARD METAL AND METHOD FOR THE PRODUCTION THEREOF |
CA1336387C (en) * | 1988-06-29 | 1995-07-25 | Madapusi Kande Keshavan | Rod for applying hard surfacing to a surface and method of making same |
US5051112A (en) * | 1988-06-29 | 1991-09-24 | Smith International, Inc. | Hard facing |
US5250355A (en) * | 1991-12-17 | 1993-10-05 | Kennametal Inc. | Arc hardfacing rod |
DE102007019150A1 (en) * | 2007-04-20 | 2008-10-30 | Durum Verschleißschutz GmbH | Material and method for coating a surface |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE6690C (en) * | H. G. IPSEN, Mechaniker, in Copenhagen (Dänemark) | Glide wheels | ||
CA592214A (en) * | 1960-02-09 | Titanium Products Corporation Limited | Process for the manufacture of hard metal carbide products | |
US1721416A (en) * | 1925-05-07 | 1929-07-16 | Gen Electric | Hard-metal composition |
GB395721A (en) * | 1931-11-16 | 1933-07-17 | Molybdenum Co Nv | An improved material for tool or tool parts |
US2002198A (en) * | 1931-11-19 | 1935-05-21 | Haynes Stellite Co | Surface hardening metal articles |
US1977361A (en) * | 1933-02-16 | 1934-10-16 | Taylor Clifton | Method of preparing and composition of rods of hard facing material |
US2067166A (en) * | 1933-03-06 | 1937-01-12 | Ramet Corp | Tantalum carbide alloy |
US2137471A (en) * | 1937-12-10 | 1938-11-22 | John A Zublin | Composite welding rod |
US2219462A (en) * | 1938-03-11 | 1940-10-29 | Haynes Stellite Co | Welding rod |
GB637849A (en) * | 1948-02-20 | 1950-05-24 | Hadfields Ltd | Improvements in or relating to ferrous compositions and their manufacture and application |
GB732440A (en) * | 1951-01-31 | 1955-06-22 | Titanium Products Ltd | Improvements in or relating to sintered hard carbide products |
AT191693B (en) * | 1953-04-28 | 1957-09-10 | Boehler & Co Ag Geb | Sintered welding electrode, process for its manufacture and use of this electrode |
AT182278B (en) * | 1954-06-16 | 1955-06-10 | Boehler & Co Ag Geb | Welding electrode |
US2982845A (en) * | 1958-07-11 | 1961-05-02 | Union Carbide Corp | Electric arc spraying |
US2847555A (en) * | 1955-10-11 | 1958-08-12 | Union Carbide Corp | High pressure arc process and apparatus |
US2998922A (en) * | 1958-09-11 | 1961-09-05 | Air Reduction | Metal spraying |
-
1959
- 1959-04-18 AT AT293759A patent/AT217818B/en active
-
1960
- 1960-04-11 US US21083A patent/US3109917A/en not_active Expired - Lifetime
- 1960-04-12 DE DEB57461A patent/DE1242984B/en active Pending
- 1960-04-12 CH CH410860A patent/CH424434A/en unknown
- 1960-04-12 GB GB12983/60A patent/GB904652A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3109917A (en) | 1963-11-05 |
AT217818B (en) | 1961-10-25 |
DE1242984B (en) | 1967-06-22 |
GB904652A (en) | 1962-08-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CH424434A (en) | Process for the production of hard and wear-resistant armor on large and therefore crack-prone surfaces | |
DE2407410B2 (en) | Carbide hard metal with precipitation hardenable metallic matrix | |
DE102010014303A1 (en) | Composite component for rolling steel, comprises a carrier made of powder metal, and a wear-resistant body made of hard metal that is embedded in sections in the carrier, where the hard-metal body is metallized in sections | |
CH504926A (en) | Welded corrosion-resistant linings applied - from wires or powders of cobalt alloys | |
DE2916617A1 (en) | WELDING BAR AND WELDING ROD AND THEIR USE | |
DE1533478A1 (en) | Steel alloy | |
DE2446517C3 (en) | Carbide-free filler metal for build-up welding | |
DE19901170B4 (en) | Use of an iron base age alloy | |
DE1680437B1 (en) | SLIDING PROTECTION TUBES, IN PARTICULAR FOR VEHICLE TIRES | |
DE2435577C3 (en) | Use of a hard alloy as a welding filler material | |
AT145675B (en) | Sintered carbide alloy. | |
CH637099A5 (en) | Superhard mixed material | |
DE1224510B (en) | Powdery alloy for the production of coatings with high wear resistance using the spray-welding process | |
DE764510C (en) | Hard metal alloys produced by sintering or sintering and immersing the auxiliary metals | |
DE2454622C2 (en) | Roll-weld clad, corrosion-resistant molded body consisting of a base material and a coating material and a method for producing the same | |
DE2438997A1 (en) | COVER AND ITEMS COVERED WITH IT | |
DE1925669C2 (en) | Sintered steel-bonded hard alloy | |
DE608772C (en) | Process for the production of hard alloys | |
DE2203905C3 (en) | Use of an alloy for hot work tools | |
DE463832C (en) | Hard alloy | |
DE920100C (en) | Use of hard metals for the production of stone working tools, in particular deep drilling tools | |
DE670239C (en) | Welding rod for the production of build-up welds | |
DE1806224C3 (en) | Use of an austenitic, solution-annealed, hardenable manganese-nickel-chromium steel as a material for hot work tools that are stressed up to 700 degrees C. | |
DE1927432C3 (en) | Electrode for build-up welding on steel products | |
DE1962564C3 (en) | Process for the production of materials containing tungsten monocarbide |