EP0348380A1 - Use of an iron-base alloy in the manufacture of sintered parts with a high corrosion resistance, a high wear resistance as well as a high toughness and compression strength, especially for use in the processing of synthetic materials - Google Patents
Use of an iron-base alloy in the manufacture of sintered parts with a high corrosion resistance, a high wear resistance as well as a high toughness and compression strength, especially for use in the processing of synthetic materials Download PDFInfo
- Publication number
- EP0348380A1 EP0348380A1 EP89890163A EP89890163A EP0348380A1 EP 0348380 A1 EP0348380 A1 EP 0348380A1 EP 89890163 A EP89890163 A EP 89890163A EP 89890163 A EP89890163 A EP 89890163A EP 0348380 A1 EP0348380 A1 EP 0348380A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- max
- iron
- content
- alloy according
- carbides
- 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.)
- Granted
Links
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 33
- 239000000956 alloy Substances 0.000 title claims abstract description 33
- 238000005260 corrosion Methods 0.000 title claims abstract description 15
- 230000007797 corrosion Effects 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 230000006835 compression Effects 0.000 title description 2
- 238000007906 compression Methods 0.000 title description 2
- 229920002994 synthetic fiber Polymers 0.000 title 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000011651 chromium Substances 0.000 claims abstract description 34
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 31
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000010936 titanium Substances 0.000 claims abstract description 24
- 239000010955 niobium Substances 0.000 claims abstract description 23
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 22
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 20
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 20
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 19
- 150000001247 metal acetylides Chemical class 0.000 claims abstract description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052742 iron Inorganic materials 0.000 claims abstract description 17
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 239000004033 plastic Substances 0.000 claims abstract description 11
- 229920003023 plastic Polymers 0.000 claims abstract description 11
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000011159 matrix material Substances 0.000 claims abstract description 10
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims abstract description 10
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 9
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000011733 molybdenum Substances 0.000 claims abstract description 8
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 8
- 239000010937 tungsten Substances 0.000 claims abstract description 8
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052796 boron Inorganic materials 0.000 claims abstract description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 26
- 239000000843 powder Substances 0.000 claims description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 6
- 229910052717 sulfur Inorganic materials 0.000 claims description 6
- 239000011593 sulfur Substances 0.000 claims description 6
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052748 manganese Inorganic materials 0.000 claims description 5
- 239000011572 manganese Substances 0.000 claims description 5
- 229910052698 phosphorus Inorganic materials 0.000 claims description 5
- 239000011574 phosphorus Substances 0.000 claims description 5
- 238000007493 shaping process Methods 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 238000005496 tempering Methods 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 239000010941 cobalt Substances 0.000 claims description 4
- 229910017052 cobalt Inorganic materials 0.000 claims description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 238000000137 annealing Methods 0.000 abstract description 3
- 239000004411 aluminium Substances 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 238000000227 grinding Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 238000005275 alloying Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000002775 capsule Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 238000009689 gas atomisation Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- 229910000669 Chrome steel Inorganic materials 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
- C22C33/0285—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5% with Cr, Co, or Ni having a minimum content higher than 5%
Definitions
- the invention relates to the use of an iron-based alloy with a special composition as a material for the powder metallurgical production of parts with high corrosion resistance, high wear resistance and high toughness and pressure resistance, preferably for plastic molds, machine parts and tools for non-cutting shaping.
- a material for the powder metallurgical production of parts with high corrosion resistance, high wear resistance and high toughness and pressure resistance preferably for plastic molds, machine parts and tools for non-cutting shaping.
- shaping parts are exposed to chemical and abrasive stresses at the same time, these parts having to have high material toughness, high compressive strength and special material homogeneity due to the mechanical stresses.
- Such requirements are placed, for example, on materials that are used in devices for pressing fiber-reinforced or filler-containing plastics. Austenitic steels or chrome steels with a chromium content of approx.
- alloys according to DIN material no. are used for mechanical components such as screws etc. and also for forming and pressing tools, which are particularly exposed to corrosive stresses. 1.4528. Although such materials have sufficient corrosion resistance, the wear behavior is usually unsatisfactory in practical operation. In order to improve or increase the wear resistance and hardness of the steel, attempts have also been made by higher carbon contents to increase the carbide content of the alloy. These steels, for example alloys according to DIN material no. 1.2080 and material no. 1.2379, with a carbon content of approx. 2% and a chromium content of approx.
- the object of the invention is to avoid the above disadvantages and, in particular, to create materials which can be used advantageously for the plastics processing industry and which, due to a special composition when using certain manufacturing processes, provide high corrosion resistance, high wear resistance and high pressure resistance have good toughness properties.
- the invention therefore relates to the use of an iron-based alloy with a composition in% by weight.
- the alloy proportions in% by weight chrome 18.0 - 25.0 molybdenum 0.6 - 1.7 tungsten 0.5 - 1.5 Vanadium 3.5 - 5.6 nitrogen 0.03-0.1 niobium up to 5.0 titanium up to 5.0 boron to 0.03
- the material has a niobium content of 0.2 to 3.0 and / or a titanium content of 0.2 to 3.5 and / or a boron content of 0.001 to 0.002. It is particularly preferred if the value is formed from (% Cr - 13) + 4.4x (% V - 3) + 2x (% Nb) + 4.2x (Ti) is at least 10.0.
- the parts which are manufactured from the alloy according to the invention or from the material according to the invention by a powder metallurgical manufacturing process must have a chromium concentration in all parts of the matrix of at least 13 after hardening and tempering.
- the alloy according to the invention from a minimum value, which takes into account the concentrations and the respective effect with the mutual influence of the carbide-forming elements chromium, vanadium, niobium and titanium, and which in particular determines the wear resistance of the material, in certain narrow Limits set carbon contents and when using powder metallurgical manufacturing processes, materials that have high corrosion resistance, high wear resistance, high pressure resistance and high toughness and are advantageous, especially for the construction of plastic molds, can be used, the hardened and tempered state of the Chromium content in all areas of the matrix and the proportion as well as the composition and the grain size of the carbides can be adjusted according to the invention.
- Silicon as a deoxidizing agent influences the composition of the oxides and, in small concentrations, can be advantageous for good polishability from Le manufactured parts. Levels above 1% by weight, however, have an adverse effect on the solidification behavior and, if appropriate, on the conversion processes during the heat treatment. Manganese contents of up to 1% by weight may be important for sulfur contents of up to 0.03% by weight in order to bind the sulfur as sulfide and thereby improve the toughness of the material. Phosphorus has an embrittling effect and should be present in the steel as low as possible, but below 0.03% by weight. Chromium acts as an alloying element which, from a content of approx. 13% by weight in the matrix, makes the material resistant to corrosion.
- chromium is a carbide former that can also form M23C6 carbides with carbon in certain carbon activities and in the presence of molybdenum and vanadium in addition to M7C3 carbides. It is therefore important that the steel contains at least 16% by weight of chromium, but at most contains 29% by weight of chromium, because higher chromium concentrations lead to embrittlement of the material. Molybdenum in a content of 0.4 to 2.5 wt .-% and tungsten in a content of 0.3 to 2.0 wt .-% cause an increase in secondary hardness in the heat treatment by the formation of fine carbides and are used to adjust the carbon activity Alloy important.
- Vanadium as a strong carbide former, causes the formation of MC carbides, especially at levels above 0.7 to 3% by weight. Higher contents, in particular over 10%, lead to an improvement in wear resistance, but the toughness of the parts deteriorates considerably. Titanium up to 5% by weight improves the wear resistance of the material, in particular through MC carbide formation. Due to nitride formation, nitrogen contents from 0.01% have a grain-refining effect or prevent grain growth during annealing at high temperatures tures, whereby a decrease in the toughness of the alloy is avoided. Furthermore, wear resistance can be improved by nitrogen concentrations up to 0.18%.
- Aluminum can be alloyed as an element with a high affinity for oxygen and a high affinity for nitrogen in concentrations of up to 1% by weight to adjust the low oxygen content of the steel and to avoid grain growth, whereby advantageous effects on the conversion behavior and the toughness of the material can also be achieved. It was also found that a minimum value of the alloy, formed from the concentrations of the carbide- and nitride-forming elements chromium, tungsten, niobium, titanium and certain action factors of these elements is required for the setting of the desired mechanical properties of the part, by increasing this Worth an improvement in wear resistance and compressive strength with a slight decrease in toughness.
- the carbon content is set within narrow limits depending on the contents and on certain operating parameters of the carbide-forming elements in the steel in order to obtain the desired properties of the parts.
- MC carbides are formed for matrix hardening and to obtain high compressive strength M7C3, M23C6 and M6C carbides and for setting high wear resistance, but on the other hand there is a chromium content of greater than 13% required for corrosion resistance in all areas of the matrix.
- Powder-metallurgical production of the parts is essential because this significantly improves their isotropy of the properties of the material and the grain size of the precipitates or intermetallic phases can be kept small.
- Carbides with grain sizes over 14 ⁇ m significantly impair the mechanical properties, in particular the bending strength of the parts.
- the powder can be produced using all suitable processes, in particular using gas atomization processes, after which, if appropriate, compacting is carried out by hot-isostatic pressing and / or by hot-working the powder in suitable casings.
- the wear behavior of the part was tested in the grinding wheel test, in which a steel disc rotates in a corundum-water mixture, against which the sample is pressed.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
- Laminated Bodies (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
Description
Die Erfindung betrifft die Verwendung einer Eisenbasislegierung mit spezieller Zusammensetzung als Werkstoff für die pulvermetallurgische Herstellung von Teilen mit hoher Korrosionsbeständigkeit, hoher Verschleißfestigkeit sowie hoher Zähigkeit und Druckfestigkeit, vorzugsweise für Kunststofformen, Maschinenteile und Werkzeuge zur spanlosen Formgebung. Insbesondere in der Kunststoffindustrie sind formgebende Teile gleichzeitig chemischen und abrasiven Beanspruchungen ausgesetzt, wobei diese Teile aufgrund der mechanischen Beanspruchungen, gegebenenfalls hohe Materialzähigkeit, hohe Druckfestigkeit und besondere Werkstoffhomogenität aufweisen müssen. Derartige Anforderungen werden beispielsweise an Materialien gestellt, welche in Einrichtungen zum Verpressen von faserverstärkten oder Füllstoffe enthaltenden Kunststoffen eingesetzt werden.
Für Maschinenbauelemente, wie beispielsweise Schnecken etc. und auch für Umform- und Preßwerkzeuge, welche insbesondere korrosiven Beanspruchungen ausgesetzt sind, werden austenitische Stähle oder Chromstähle mit einem Chromgehalt von ca. 18 %, beispielsweise Legierungen nach DIN Werkstoff-Nr. 1.4528, verwendet. Derartige Werkstoffe weisen zwar eine ausreichende Korrosionsbeständigkeit auf, das Verschleißverhalten ist jedoch zumeist im praktischen Betrieb nicht befriedigend.
Um die Verschleißfestigkeit und die Härte des Stahles zu verbessern bzw. zu erhöhen, wurde auch versucht, durch höhere Kohlenstoffgehalte den Karbidanteil der Legierung zu vergrößern. Diese Stähle, beispielsweise Legierungen nach DIN Werkstoff-Nr. 1.2080 und Werkstoff-Nr. 1.2379, mit einem Kohlenstoffgehalt von ca. 2 % und einem Chromgehalt von ca. 12 % haben eine verbesserte Verschleißfestigkeit, sind jedoch für korrosive Beanspruchungen weniger geeignet, wobei die Teile aufgrund einer gegebenenfalls ungünstigen Karbidstruktur sich anisotropisch verhalten, spröde sind bzw. eine hohe Bruchneigung aufweisen, wobei auch zumeist keine ausreichende Formbeständigkeit bei der Wärmebehandlung gegeben ist.The invention relates to the use of an iron-based alloy with a special composition as a material for the powder metallurgical production of parts with high corrosion resistance, high wear resistance and high toughness and pressure resistance, preferably for plastic molds, machine parts and tools for non-cutting shaping. In the plastics industry in particular, shaping parts are exposed to chemical and abrasive stresses at the same time, these parts having to have high material toughness, high compressive strength and special material homogeneity due to the mechanical stresses. Such requirements are placed, for example, on materials that are used in devices for pressing fiber-reinforced or filler-containing plastics.
Austenitic steels or chrome steels with a chromium content of approx. 18%, for example alloys according to DIN material no., Are used for mechanical components such as screws etc. and also for forming and pressing tools, which are particularly exposed to corrosive stresses. 1.4528. Although such materials have sufficient corrosion resistance, the wear behavior is usually unsatisfactory in practical operation.
In order to improve or increase the wear resistance and hardness of the steel, attempts have also been made by higher carbon contents to increase the carbide content of the alloy. These steels, for example alloys according to DIN material no. 1.2080 and material no. 1.2379, with a carbon content of approx. 2% and a chromium content of approx. 12%, have improved wear resistance, but are less suitable for corrosive stresses, whereby the parts behave anisotropically due to a possibly unfavorable carbide structure, are brittle or have a high tendency to break have, whereby usually there is not sufficient dimensional stability in the heat treatment.
Es wurde auch vorgeschlagen, Stähle zu verwenden, welche äußerst weite Bereichsgrenzen in ihrer chemischen Zusammensetzung, insbesondere für den Kohlenstoffgehalt, den Chromgehalt und den Vanadingehalt aufweisen, wobei jedoch keinerlei Hinweise gegeben wurden, wie eine Legierung, die eine hohe Korrosionsbeständigkeit und eine hohe Verschleißfestigkeit mit ausreichenden Zähigkeitseigenschaften und hoher Druckfestigkeit aufweist, zusammengesetzt sein muß. Auch der Fachmann konnte daraus keine Lehre entnehmen, wie und wodurch eine Kombination der geforderten Materialeigenschaften erzielbar ist.It has also been proposed to use steels which have extremely wide range limits in their chemical composition, in particular for the carbon content, the chromium content and the vanadium content, but no indications have been given, such as an alloy which has a high corrosion resistance and a high wear resistance has sufficient toughness properties and high compressive strength, must be composed. Even the person skilled in the art could not learn from this how and how a combination of the required material properties can be achieved.
Ausgehend von diesem Stand der Technik liegt der Erfindung die Aufgabe zugrunde, obige Nachteile zu vermeiden und insbesondere für die kunststoffverarbeitende Industrie vorteilhaft verwendbare Werkstoffe zu schaffen, die durch eine spezielle Zusammensetzung bei Anwendung bestimmter Herstellverfahren eine hohe Korrosionsbeständigkeit, eine hohe Verschleißfestigkeit und eine hohe Druckfestigkeit bei guten Zähigkeitseigenschaften aufweisen.On the basis of this prior art, the object of the invention is to avoid the above disadvantages and, in particular, to create materials which can be used advantageously for the plastics processing industry and which, due to a special composition when using certain manufacturing processes, provide high corrosion resistance, high wear resistance and high pressure resistance have good toughness properties.
Diese Aufgabe wird durch die Erfindung gelöst. Gegenstand der Erfindung ist daher die Verwendung einer Eisenbasislegierung mit einer Zusammensetzung in Gew.-%
(%Cr - 13) + 4,4x (%V - 3) + 2x (%Nb) + 4,2x (%Ti)
großer als 8,8 ist und der minimale Kohlenstoffgehalt der Legierung entsprechend dem Zusammenhang
Cmin = 0,3 + [(%Cr - 13) x 0,06] + [(2x %Mo + W)
x 0,03] + (%V x 0,24) + (%Nb x 0,13)
+ (%Ti x 0,25)
und der maximale Kohlenstoffgehalt der Legierung entsprechend dem Zusammenhang
Cmax = 0,7 + [(%Cr - 13) x 0,06] + [(2x %Mo + W)
x 0,03] + (%V x 0,24) + (%Nb x 0,13)
+ (%Ti x 0,25)
beträgt, zur pulvermetallurgischen Herstellung von Teilen mit hoher Korrosionsbeständigkeit, hoher Verschleißfestigkeit sowie hoher Zähigkeit und hoher Druckfestigkeit, insbesondere für Kunststofformen, Maschinenteile und Werkzeuge zur spanlosen Formgebung mit der Maßgabe, daß die Matrix nach dem Härten und Anlassen einen Chromgehalt von mindestens 13 % aufweist und der Karbidgehalt mindestens 25 Vol.-% beträgt, wobei die Karbidkorngröße kleiner als 14 µm ist und mindestens 5 Vol.-% der Karbide als MC-Karbide ausgebildet sind. Bevorzugt ist es, wenn die Legierungsanteile in Gew.-%
(%Cr - 13) + 4,4x (%V - 3) + 2x (%Nb) + 4,2x (Ti)
mindestens 10,0 beträgt. Die Teile, die aus der erfindungsgemäßen Legierung bzw. aus dem erfindungsgemäßen Werkstoff nach einem pulvermetallurgischen Herstellungsverfahren gefertigt sind, müssen dabei nach dem Härten und Anlassen eine Chromkonzentration in allen Teilen der Matrix von mindestens 13 aufweisen.This object is achieved by the invention. The invention therefore relates to the use of an iron-based alloy with a composition in% by weight.
(% Cr - 13) + 4.4x (% V - 3) + 2x (% Nb) + 4.2x (% Ti)
is greater than 8.8 and the minimum carbon content of the alloy according to the relationship
C min = 0.3 + [(% Cr - 13) x 0.06] + [(2x% Mo + W)
x 0.03] + (% V x 0.24) + (% Nb x 0.13)
+ (% Ti x 0.25)
and the maximum carbon content of the alloy according to the relationship
C max = 0.7 + [(% Cr - 13) x 0.06] + [(2x% Mo + W)
x 0.03] + (% V x 0.24) + (% Nb x 0.13)
+ (% Ti x 0.25)
is for powder metallurgical production of parts with high corrosion resistance, high wear resistance as well as high toughness and high pressure resistance, in particular for plastic molds, machine parts and tools for non-cutting shaping with the proviso that the matrix has a chromium content of at least 13% after hardening and tempering and the carbide content is at least 25% by volume, the carbide grain size being less than 14 μm and at least 5% by volume of the carbides being in the form of MC carbides. It is preferred if the alloy proportions in% by weight
(% Cr - 13) + 4.4x (% V - 3) + 2x (% Nb) + 4.2x (Ti)
is at least 10.0. The parts which are manufactured from the alloy according to the invention or from the material according to the invention by a powder metallurgical manufacturing process must have a chromium concentration in all parts of the matrix of at least 13 after hardening and tempering.
Überraschenderweise hat sich gezeigt, daß die erfindungsgemäße Legierung ab einem Mindestwert, der die Konzentrationen und die jeweilige Wirkung mit der gegenseitigen Beeinflussung der karbidbildenden Elemente Chrom, Vanadin, Niob und Titan berücksichtigt und durch den insbesondere die Verschleißfestigkeit des Werkstoffes bestimmt ist, bei bestimmten in engen Grenzen eingestellten Kohlenstoffgehalten und bei Anwendung pulvermetallurgischer Herstellverfahren, Werkstoffe ergibt, die gleichzeitig eine hohe Korrosionsbeständigkeit, eine hohe Verschleißfestigkeit, eine hohe Druckbeständigkeit und eine hohe Zähigkeit aufweisen und vorteilhaft, insbesondere für den Bau von Kunststofformen, einsetzbar sind, wobei im gehärteten und angelassenen Zustand der Chromgehalt in allen Bereichen der Matrix und der Anteil sowie die Zusammensetzung und die Korngröße der Karbide erfindungsgemäß eingestellt werden können.Surprisingly, it has been shown that the alloy according to the invention from a minimum value, which takes into account the concentrations and the respective effect with the mutual influence of the carbide-forming elements chromium, vanadium, niobium and titanium, and which in particular determines the wear resistance of the material, in certain narrow Limits set carbon contents and when using powder metallurgical manufacturing processes, materials that have high corrosion resistance, high wear resistance, high pressure resistance and high toughness and are advantageous, especially for the construction of plastic molds, can be used, the hardened and tempered state of the Chromium content in all areas of the matrix and the proportion as well as the composition and the grain size of the carbides can be adjusted according to the invention.
Beschreibung der Legierung bzw. der Wirkung der Legierungselemente:Description of the alloy or the effect of the alloying elements:
Silizium als Desoxidationsmittel beeinflußt die Zusammensetzung der Oxide und kann in geringen Konzentrationen vorteilhaft für eine gute Polierbarkeit der aus der Le gierung gefertigten Teile sein. Gehalte über 1 Gew.-% wirken jedoch nachteilig auf das Erstarrungsverhalten und gegebenenfalls auf die Umwandlungsvorgänge bei der Wärmebehandlung. Mangangehalte bis zu 1 Gew.-% sind gegebenenfalls bei Schwefelgehalten bis 0,03 Gew.-% wichtig, um den Schwefel als Sulfid abzubinden und dadurch die Zähigkeit des Werkstoffes zu verbessern. Phosphor wirkt versprödend und soll im Stahl so niedrig wie möglich, jedoch unter 0,03 Gew.-%, vorliegen. Chrom wirkt als Legierungselement, das ab einem Gehalt von ca. 13 Gew.-% in der Matrix eine Korrosionsbeständigkeit des Werkstoffes bewirkt. Gleichzeitig ist Chrom ein Karbidbildner, der mit Kohlenstoff bei bestimmten Kohlenstoffaktivitäten und bei Anwesenheit von Molybdän und Vanadin neben M₇C₃ Karbiden auch M₂₃C₆ Karbide bilden kann. Es ist somit wichtig, daß der Stahl mindestens 16 Gew.-% Chrom enthält, höchstens jedoch einen Gehalt von 29 Gew.-% Chrom aufweist, weil höhere Chromkonzentrationen zu einer Versprödung des Werkstoffes führen. Molybdän in Gehalten von 0,4 bis 2,5 Gew.-% und Wolfram in Gehalten von 0,3 bis 2,0 Gew.-% bewirken einen Sekundärhärteanstieg bei der Wärmebehandlung durch die Bildung feiner Karbide und sind für die Einstellung der Kohlenstoffaktivität der Legierung wichtig. Vanadium als starker Karbidbildner bewirkt insbesondere in Gehalten über 0,7 bis 3 Gew.-% die Entstehung von MC-Karbiden. Höhere Gehalte, insbesondere über 10 %, führen zwar zu einer Verbesserung der Verschleißfestigkeit, die Zähigkeit der Teile wird jedoch wesentlich verschlechtert. Titan bis 5 Gew.-% verbessert die Verschleißfestigkeit des Werkstoffes, insbesondere durch eine MC-Karbidbildung. Aufgrund einer Nitridbildung wirken Stickstoffgehalte ab 0,01 % kornfeinend bzw. verhindern ein Kornwachstum beim Glühen bei hohen Tempera turen, wodurch ein Abfall der Zähigkeit der Legierung vermieden wird. Weiters kann durch Stickstoffkonzentrationen bis 0,18 % insbesondere die Verschleißfestigkeit verbessert werden. Aluminium kann als Element mit hoher Sauerstoffaffinität und hoher Stickstoffaffinität in Konzentrationen bis 1 Gew.-% zur Einstellung niedriger Sauerstoffgehalte des Stahles und zur Vermeidung des Kornwachstumes zulegiert sein, wobei auch vorteilhafte Wirkungen auf das Umwandlungsverhalten und die Zähigkeit des Werkstoffes erzielbar sind.
Es wurde auch gefunden, daß für die Einstellung der gewünschten mechanischen Eigenschaften des Teiles ein Mindestwert der Legierung, gebildet aus den Konzentrationen der karbid- und nitridbildenden Elemente Chrom, Wolfram, Niob, Titan und bestimmten Wirkungsfaktoren dieser Elemente erforderlich ist, wobei durch eine Erhöhung dieses Wertes eine Verbesserung der Verschleißfestigkeit und der Druckfestigkeit bei gering abfallender Zähigkeit bewirkt wird. Weiters ist es wichtig, daß der Kohlenstoffgehalt in engen Grenzen in Abhängigkeit von den Gehalten und von bestimmten Wirkungsparametern der karbidbildenden Elemente im Stahl eingestellt wird, um die gewünschten Eigenschaften der Teile zu erhalten. Dadurch werden einerseits für eine Matrixhärtung und zum Erhalt hoher Druckfestigkeit M₇C₃, M₂₃C₆ und M₆C Karbide und zur Einstellung hoher Verschleißfestigkeit MC-Karbide gebildet, wobei jedoch andererseits ein für die Korrosionsbeständigkeit erforderlicher Chromgehalt von größer als 13 % in allen Bereichen der Matrix vorliegt.
Eine pulvermetallurgische Herstellung der Teile ist wesentlich, weil dadurch deren Isotropie der Eigenschaften des Werkstoffes wesentlich verbessert wird und die Korngröße der Ausscheidungen bzw. intermetallischen Phasen klein gehalten werden kann. Karbide mit Korngrößen über 14 µm verschlechtern wesentlich die mechanischen Eigenschaften, insbesondere die Biegefestigkeit der Teile. Die Pulverherstellung kann dabei mit allen geeigneten Verfahren, insbesondere mit Gasverdüsungsverfahren erfolgen, wonach gegebenenfalls ein Kompaktieren durch heißisostatisches Pressen und/oder durch Warmverformung des Pulvers in geeigneten Umhüllungen durchgeführt wird.Silicon as a deoxidizing agent influences the composition of the oxides and, in small concentrations, can be advantageous for good polishability from Le manufactured parts. Levels above 1% by weight, however, have an adverse effect on the solidification behavior and, if appropriate, on the conversion processes during the heat treatment. Manganese contents of up to 1% by weight may be important for sulfur contents of up to 0.03% by weight in order to bind the sulfur as sulfide and thereby improve the toughness of the material. Phosphorus has an embrittling effect and should be present in the steel as low as possible, but below 0.03% by weight. Chromium acts as an alloying element which, from a content of approx. 13% by weight in the matrix, makes the material resistant to corrosion. At the same time, chromium is a carbide former that can also form M₂₃C₆ carbides with carbon in certain carbon activities and in the presence of molybdenum and vanadium in addition to M₇C₃ carbides. It is therefore important that the steel contains at least 16% by weight of chromium, but at most contains 29% by weight of chromium, because higher chromium concentrations lead to embrittlement of the material. Molybdenum in a content of 0.4 to 2.5 wt .-% and tungsten in a content of 0.3 to 2.0 wt .-% cause an increase in secondary hardness in the heat treatment by the formation of fine carbides and are used to adjust the carbon activity Alloy important. Vanadium, as a strong carbide former, causes the formation of MC carbides, especially at levels above 0.7 to 3% by weight. Higher contents, in particular over 10%, lead to an improvement in wear resistance, but the toughness of the parts deteriorates considerably. Titanium up to 5% by weight improves the wear resistance of the material, in particular through MC carbide formation. Due to nitride formation, nitrogen contents from 0.01% have a grain-refining effect or prevent grain growth during annealing at high temperatures tures, whereby a decrease in the toughness of the alloy is avoided. Furthermore, wear resistance can be improved by nitrogen concentrations up to 0.18%. Aluminum can be alloyed as an element with a high affinity for oxygen and a high affinity for nitrogen in concentrations of up to 1% by weight to adjust the low oxygen content of the steel and to avoid grain growth, whereby advantageous effects on the conversion behavior and the toughness of the material can also be achieved.
It was also found that a minimum value of the alloy, formed from the concentrations of the carbide- and nitride-forming elements chromium, tungsten, niobium, titanium and certain action factors of these elements is required for the setting of the desired mechanical properties of the part, by increasing this Worth an improvement in wear resistance and compressive strength with a slight decrease in toughness. Furthermore, it is important that the carbon content is set within narrow limits depending on the contents and on certain operating parameters of the carbide-forming elements in the steel in order to obtain the desired properties of the parts. As a result, MC carbides are formed for matrix hardening and to obtain high compressive strength M₇C₃, M₂₃C₆ and M₆C carbides and for setting high wear resistance, but on the other hand there is a chromium content of greater than 13% required for corrosion resistance in all areas of the matrix.
Powder-metallurgical production of the parts is essential because this significantly improves their isotropy of the properties of the material and the grain size of the precipitates or intermetallic phases can be kept small. Carbides with grain sizes over 14 µm significantly impair the mechanical properties, in particular the bending strength of the parts. The powder can be produced using all suitable processes, in particular using gas atomization processes, after which, if appropriate, compacting is carried out by hot-isostatic pressing and / or by hot-working the powder in suitable casings.
Die Erfindung wird zwecks weiterer Verdeutlichung anhand eines Beispieles nachfolgend beschrieben.
Aus einer Schmelze mit folgenden Gehalten in Gew.-%
Folgende Verschleißbedingungen wurden angewendet:
From a melt with the following contents in% by weight
The following wear conditions were applied:
Bei der Erprobung wurde nach einer Zeit vom 100 sec. ein spezifischer Verschleiß (relativ zum hoch verschleißfe sten, jedoch weniger korrosionsbeständigen Werkstoff mit einer Zusammensetzung von 2,3 % C, 12,5 % Cr, 1,1 % Mo, 4,0 % V) von 200 %, nach 1000 h 128 % und nach 10.000 h 120 % festgestellt. Das Korrosionsverhalten des Werkstoffes wurde im Salzsprühtest ermittelt, wobei die korrodierte Oberfläche in % nach 480 min. einen Wert von 50 ergab. Eine weitere Prüfung des Korrosionsverhaltens in 20 %iger Essigsäure über einen Zeitraum von 24 h erbrachte einen Wert von 6,98 g/m² h. Die metallographischen, elektronenmikroskopischen und röntgenanalytischen Untersuchungen ergaben, daß der Karbidanteil ca. 39 Vol.-% betrug, wovon ca. 10 Vol.-% als MC-Karbide vorlagen, wobei die maximale Karbidkorngröße 10 µm aufwies.During the test, a specific wear (relative to the high wear Most, but less corrosion-resistant material with a composition of 2.3% C, 12.5% Cr, 1.1% Mo, 4.0% V) of 200%, 128% after 1000 h and 120% after 10,000 h . The corrosion behavior of the material was determined in the salt spray test, the corroded surface in% after 480 min. gave a value of 50. A further test of the corrosion behavior in 20% acetic acid over a period of 24 h resulted in a value of 6.98 g / m² h. The metallographic, electron microscopic and X-ray analyzes showed that the carbide content was approximately 39% by volume, of which approximately 10% by volume was present as MC carbides, the maximum carbide grain size being 10 µm.
Claims (9)
(%Cr - 13) + 4,4x (%V - 3) + 2x (%Nb) + 4,2x (%Ti)
größer als 8,8 ist und der minimale Kohlenstoffgehalt der Legierung entsprechend dem Zusammenhang
Cmin = 0,3 + [(%Cr - 13) x 0,06] + [(2x %Mo + W)
x 0,03] + (%V x 0,24) + (%Nb x 0,13)
+ (%Ti x 0,25)
und der maximale Kohlenstoffgehalt der Legierung entsprechend dem Zusammenhang
Cmax = 0,7 + [(%Cr - 13) x 0,06] + [(2x %Mo + W)
x 0,03] + (%V x 0,24) + (%Nb x 0,13)
+ (%Ti x 0,25)
beträgt, zur pulvermetallurgischen Herstellung von Teilen mit hoher Korrosionsbeständigkeit und hoher Verschleißfestigkeit sowie hoher Zähigkeit und hoher Druckfestigkeit, insbesondere für Kunststofformen, Maschinenteile und Werkzeuge zur spanlosen Formgebung mit der Maßgabe, daß die Matrix nach dem Härten und Anlassen einen Chromgehalt von mindestens 13 % aufweist und der Karbidgehalt mindestens 25 Vol.-% beträgt, wobei die Karbidkorngröße kleiner als 14 µm ist und mindestens 5 Vol.-% der Karbide als MC-Karbide ausgebildet sind.1. Use of an iron-based alloy with a composition in% by weight
(% Cr - 13) + 4.4x (% V - 3) + 2x (% Nb) + 4.2x (% Ti)
is greater than 8.8 and the minimum carbon content of the alloy according to the relationship
C min = 0.3 + [(% Cr - 13) x 0.06] + [(2x% Mo + W)
x 0.03] + (% V x 0.24) + (% Nb x 0.13)
+ (% Ti x 0.25)
and the maximum carbon content of the alloy according to the relationship
C max = 0.7 + [(% Cr - 13) x 0.06] + [(2x% Mo + W)
x 0.03] + (% V x 0.24) + (% Nb x 0.13)
+ (% Ti x 0.25)
is for the powder metallurgical production of parts with high corrosion resistance and high wear resistance as well as high toughness and high pressure resistance, in particular for plastic molds, machine parts and tools for non-cutting shaping, with the proviso that the matrix has a chromium content of at least 13% after hardening and tempering and the carbide content is at least 25% by volume, the carbide grain size being less than 14 μm and at least 5% by volume of the carbides being in the form of MC carbides.
(%Cr - 13) + 4.4x (%V - 3) + 2x (%Nb) + 4,2x (%Ti)
größer als 8,8 ist und der maximale Kohlenstoffgehalt der Legierung entsprechend dem Zusammenhang
Cmin = 0,3 + [(%Cr - 13) x 0,06] + [(2x %Mo + W)
x 0,03] + (%V x 0,24 + (%Nb x 0,13)
+ (%Ti x 0,25)
und der maximale Kohlenstoffgehalt der Legierung entsprechend dem Zusammenhang
Cmax = 0,7 + [(%Cr - 13) x 0,06] + [(2x %Mo + W)
x 0,3] + (%V x 0,24) + (%Nb x 0,13)
+ (%Ti x 0,25)
beträgt, zur pulvermetallurgischen Herstellung von Teilen mit hoher Korrosionsbeständigkeit und hoher Verschleißfestigkeit sowie hoher Zähigkeit und hoher Druckfestigkeit, insbesondere für Kunststofformen, Maschinenteile und Werkzeuge zur spanlosen Formgebung mit der Maßgabe, daß die Matrix nach dem Härten und Anlassen einen Chromgehalt von mindestens 13 % aufweist und der Karbidgehalt mindestens 25 % beträgt, wobei die Karbidkorngröße kleiner als 14 µm ist und mindestens 5 Vol.-% der Karbide als MC-Karbide ausgebildet sind.2. Use of an iron-based alloy according to claim 1, with a composition in wt .-%
(% Cr - 13) + 4.4x (% V - 3) + 2x (% Nb) + 4.2x (% Ti)
is greater than 8.8 and the maximum carbon content of the alloy according to the relationship
C min = 0.3 + [(% Cr - 13) x 0.06] + [(2x% Mo + W)
x 0.03] + (% V x 0.24 + (% Nb x 0.13)
+ (% Ti x 0.25)
and the maximum carbon content of the alloy according to the relationship
C max = 0.7 + [(% Cr - 13) x 0.06] + [(2x% Mo + W)
x 0.3] + (% V x 0.24) + (% Nb x 0.13)
+ (% Ti x 0.25)
is for powder metallurgical production of parts with high corrosion resistance and high wear resistance as well as high toughness and high pressure resistance, especially for plastic molds, machine parts and tools for non-cutting shaping with the proviso that the matrix has a chromium content of at least 13% after hardening and tempering and the carbide content is at least 25%, the carbide grain size being smaller than 14 μm and at least 5 vol.% of the carbides as MC carbides are formed.
(%Cr - 13) + 4,4x (%V - 3) + 2x (%Nb) + 4,2x (%Ti)
größer als 10,0 ist.3. Use of an iron-based alloy according to claim 1 or 2, characterized in that the value formed from
(% Cr - 13) + 4.4x (% V - 3) + 2x (% Nb) + 4.2x (% Ti)
is greater than 10.0.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT1599/88 | 1988-06-21 | ||
AT0159988A AT393642B (en) | 1988-06-21 | 1988-06-21 | USE OF AN IRON BASED ALLOY FOR THE POWDER METALLURGICAL PRODUCTION OF PARTS WITH HIGH CORROSION RESISTANCE, HIGH WEAR RESISTANCE AND HIGH TENSITY AND PRESSURE STRENGTH, ESPECIALLY FOR THE PROCESS |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0348380A1 true EP0348380A1 (en) | 1989-12-27 |
EP0348380B1 EP0348380B1 (en) | 1992-11-19 |
EP0348380B2 EP0348380B2 (en) | 1996-04-17 |
Family
ID=3516903
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89890163A Expired - Lifetime EP0348380B2 (en) | 1988-06-21 | 1989-06-14 | Use of an iron-base alloy in the manufacture of sintered parts with a high corrosion resistance, a high wear resistance as well as a high toughness and compression strength, especially for use in the processing of synthetic materials |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0348380B2 (en) |
JP (1) | JP2583451B2 (en) |
AT (2) | AT393642B (en) |
AU (1) | AU615756B2 (en) |
DE (1) | DE58902742D1 (en) |
ES (1) | ES2052971T5 (en) |
PT (1) | PT90925B (en) |
ZA (1) | ZA894703B (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0378925A1 (en) * | 1988-12-27 | 1990-07-25 | Daido Tokushuko Kabushiki Kaisha | Powdered steel for cold processing tool |
EP0721995A2 (en) * | 1995-01-16 | 1996-07-17 | BÖHLER Edelstahl GmbH | Use of an iron based alloy for plastic molds |
GB2298869A (en) * | 1995-03-10 | 1996-09-18 | Powdrex Ltd | Stainless steel powders and articles produced therefrom by powder metallurgy |
US5679908A (en) * | 1995-11-08 | 1997-10-21 | Crucible Materials Corporation | Corrosion resistant, high vanadium, powder metallurgy tool steel articles with improved metal to metal wear resistance and a method for producing the same |
WO2000073527A1 (en) * | 1999-05-28 | 2000-12-07 | Edelstahl Witten-Krefeld Gmbh | Spray-deposited steel, method for the production of the same and a composite substance |
WO2003069004A1 (en) * | 2002-02-15 | 2003-08-21 | Uddeholm Tooling Aktiebolag | High chromium and carbide rich tool steel made by powder metallurgi and tool made of the steel |
WO2006112912A1 (en) * | 2005-04-18 | 2006-10-26 | Wilson Tool International Inc. | Tough, wear-resistant punches and dies made of powder metallurgy cold work tool steel |
AT501794A1 (en) * | 2005-04-26 | 2006-11-15 | Boehler Edelstahl | PLASTIC FORM |
US7442338B2 (en) | 2001-11-13 | 2008-10-28 | Fundacion Inasmet | Product manufacture in structural metallic materials reinforced with carbides |
WO2011115547A1 (en) * | 2010-03-17 | 2011-09-22 | Uddeholms Ab | A method for the manufacture of a wear pad for a band saw blade guide, such a wear pad, and the use of a steel material for producing the wear pad |
EP3428300A1 (en) * | 2017-07-10 | 2019-01-16 | Saar-Pulvermetall GmbH | Roller for a grinding or/and pressing device, in particular compression roller for a press for the production of pellets, and method of manufacturing the roller |
CN111850427A (en) * | 2020-06-07 | 2020-10-30 | 江苏钢银智能制造有限公司 | Alloy steel material and steel plate processing and casting technology thereof |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5900560A (en) * | 1995-11-08 | 1999-05-04 | Crucible Materials Corporation | Corrosion resistant, high vanadium, powder metallurgy tool steel articles with improved metal to metal wear resistance and method for producing the same |
CN103060700B (en) * | 2013-01-07 | 2014-12-31 | 北京工业大学 | Boride particle reinforced Fe-Cr-Al composite material and its preparation method |
CN104878298B (en) * | 2015-05-15 | 2017-05-03 | 安泰科技股份有限公司 | Powder metallurgy wearing-resistant corrosion-resistant alloy |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1313981A (en) * | 1970-08-28 | 1973-04-18 | Hoeganaes Ab | High alloy steel powders and their consolidation into homogeneous tool steel |
LU81268A1 (en) * | 1978-09-20 | 1979-09-10 | Crucible Inc | POWDER METALLURGICAL STEEL ITEM WITH HIGH VANADIUM CARBIDE CONTENT |
EP0271238A2 (en) * | 1986-12-11 | 1988-06-15 | Crucible Materials Corporation | Wear and corrosion resistant alloy articles |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2204886C3 (en) * | 1972-02-02 | 1979-11-22 | Gfe Gesellschaft Fuer Elektrometallurgie Mbh, 4000 Duesseldorf | Process for the powder metallurgical production of high-speed steel moldings |
SE446277B (en) * | 1985-01-16 | 1986-08-25 | Kloster Speedsteel Ab | VANAD-containing TOOLS MANUFACTURED FROM METAL POWDER AND SET ON ITS MANUFACTURING |
-
1988
- 1988-06-21 AT AT0159988A patent/AT393642B/en not_active IP Right Cessation
-
1989
- 1989-06-08 JP JP1144323A patent/JP2583451B2/en not_active Expired - Lifetime
- 1989-06-14 EP EP89890163A patent/EP0348380B2/en not_active Expired - Lifetime
- 1989-06-14 ES ES89890163T patent/ES2052971T5/en not_active Expired - Lifetime
- 1989-06-14 DE DE8989890163T patent/DE58902742D1/en not_active Expired - Lifetime
- 1989-06-14 AT AT89890163T patent/ATE82595T1/en not_active IP Right Cessation
- 1989-06-20 AU AU36662/89A patent/AU615756B2/en not_active Ceased
- 1989-06-21 PT PT90925A patent/PT90925B/en not_active IP Right Cessation
- 1989-06-21 ZA ZA894703A patent/ZA894703B/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1313981A (en) * | 1970-08-28 | 1973-04-18 | Hoeganaes Ab | High alloy steel powders and their consolidation into homogeneous tool steel |
LU81268A1 (en) * | 1978-09-20 | 1979-09-10 | Crucible Inc | POWDER METALLURGICAL STEEL ITEM WITH HIGH VANADIUM CARBIDE CONTENT |
EP0271238A2 (en) * | 1986-12-11 | 1988-06-15 | Crucible Materials Corporation | Wear and corrosion resistant alloy articles |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0378925A1 (en) * | 1988-12-27 | 1990-07-25 | Daido Tokushuko Kabushiki Kaisha | Powdered steel for cold processing tool |
EP0721995A2 (en) * | 1995-01-16 | 1996-07-17 | BÖHLER Edelstahl GmbH | Use of an iron based alloy for plastic molds |
EP0721995A3 (en) * | 1995-01-16 | 1996-11-27 | Boehler Edelstahl | Use of an iron based alloy for plastic molds |
GB2298869A (en) * | 1995-03-10 | 1996-09-18 | Powdrex Ltd | Stainless steel powders and articles produced therefrom by powder metallurgy |
GB2298869B (en) * | 1995-03-10 | 1999-03-03 | Powdrex Ltd | Stainless steel powders and articles produced therefrom by powder metallurgy |
US5679908A (en) * | 1995-11-08 | 1997-10-21 | Crucible Materials Corporation | Corrosion resistant, high vanadium, powder metallurgy tool steel articles with improved metal to metal wear resistance and a method for producing the same |
US5936169A (en) * | 1995-11-08 | 1999-08-10 | Crucible Materials Corporation | Corrosion resistant, high vanadium, powder metallurgy tool steel articles with improved metal to metal wear resistance and a method for producing the same |
WO2000073527A1 (en) * | 1999-05-28 | 2000-12-07 | Edelstahl Witten-Krefeld Gmbh | Spray-deposited steel, method for the production of the same and a composite substance |
US7442338B2 (en) | 2001-11-13 | 2008-10-28 | Fundacion Inasmet | Product manufacture in structural metallic materials reinforced with carbides |
WO2003069004A1 (en) * | 2002-02-15 | 2003-08-21 | Uddeholm Tooling Aktiebolag | High chromium and carbide rich tool steel made by powder metallurgi and tool made of the steel |
WO2006112912A1 (en) * | 2005-04-18 | 2006-10-26 | Wilson Tool International Inc. | Tough, wear-resistant punches and dies made of powder metallurgy cold work tool steel |
AT501794A1 (en) * | 2005-04-26 | 2006-11-15 | Boehler Edelstahl | PLASTIC FORM |
AT501794B1 (en) * | 2005-04-26 | 2008-06-15 | Boehler Edelstahl | PLASTIC FORM |
WO2011115547A1 (en) * | 2010-03-17 | 2011-09-22 | Uddeholms Ab | A method for the manufacture of a wear pad for a band saw blade guide, such a wear pad, and the use of a steel material for producing the wear pad |
CN102905831A (en) * | 2010-03-17 | 2013-01-30 | 尤迪霍尔姆斯有限责任公司 | A method for the manufacture of a wear pad for a band saw blade guide, such a wear pad, and the use of a steel material for producing the wear pad |
EP3428300A1 (en) * | 2017-07-10 | 2019-01-16 | Saar-Pulvermetall GmbH | Roller for a grinding or/and pressing device, in particular compression roller for a press for the production of pellets, and method of manufacturing the roller |
CN111850427A (en) * | 2020-06-07 | 2020-10-30 | 江苏钢银智能制造有限公司 | Alloy steel material and steel plate processing and casting technology thereof |
Also Published As
Publication number | Publication date |
---|---|
JP2583451B2 (en) | 1997-02-19 |
EP0348380B1 (en) | 1992-11-19 |
AU3666289A (en) | 1990-01-25 |
PT90925A (en) | 1989-12-29 |
PT90925B (en) | 1997-10-31 |
ES2052971T5 (en) | 1996-10-01 |
DE58902742D1 (en) | 1992-12-24 |
JPH0277556A (en) | 1990-03-16 |
ES2052971T3 (en) | 1994-07-16 |
EP0348380B2 (en) | 1996-04-17 |
ATE82595T1 (en) | 1992-12-15 |
AT393642B (en) | 1991-11-25 |
ZA894703B (en) | 1992-01-29 |
ATA159988A (en) | 1991-05-15 |
AU615756B2 (en) | 1991-10-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE2211229C3 (en) | Process for improving the creep rupture strength at temperatures above 750 degrees C of an austenitic chrome-nickel steel semi-finished product | |
DE69818138T2 (en) | Cold work tool steel particles with high impact strength from metal powder and process for its production | |
DE2937724C2 (en) | Steel product made by powder metallurgy with a high proportion of vanadium carbide | |
DE69429610T2 (en) | High strength martensitic stainless steel and process for its manufacture | |
DE69604902T2 (en) | STAINLESS STEEL POWDER AND THEIR USE FOR PRODUCING MOLDED BODIES BY POWDER METALLURGY | |
DE2717842C2 (en) | Process for the surface treatment of sintered hard metal bodies | |
EP0348380B1 (en) | Use of an iron-base alloy in the manufacture of sintered parts with a high corrosion resistance, a high wear resistance as well as a high toughness and compression strength, especially for use in the processing of synthetic materials | |
EP1249512B1 (en) | Cold work steel for powder metallurgical production of parts | |
DE2407410B2 (en) | Carbide hard metal with precipitation hardenable metallic matrix | |
DE2429075A1 (en) | Carbonitrides of titanium alloys - for use as cutting tools in machining of metals | |
DE60124646T2 (en) | Stainless cast steel with good heat resistance and good tensionability | |
DE3853000T2 (en) | COMPOSED ALLOY STEEL POWDER AND Sintered Alloy Steel. | |
DE3881979T2 (en) | Alloyed steel powder for powder metallurgical processes. | |
DE3781773T2 (en) | ALLOY MADE OF DEFORM RESISTANT, METALLICALLY BONDED CARBONITRIDE. | |
DE3744550C2 (en) | ||
EP3323902A1 (en) | Steel material containing hard particles prepared by powder metallurgy, method for producing a component from such a steel material and component produced from the steel material | |
AT410447B (en) | HOT STEEL SUBJECT | |
DE68905066T2 (en) | HIGH TEMPERATURE RESISTANT STEEL TUBE WITH LOW SILICON CONTENT AND WITH IMPROVED DUCTILITY AND CAPABILITY PROPERTIES. | |
DE69717541T2 (en) | Low-alloy steel powder for hardener sintering | |
DE69601340T2 (en) | HIGH-STRENGTH, HIGH-STRENGTH HEAT-RESISTANT STEEL AND METHOD FOR THE PRODUCTION THEREOF | |
DE60002669T2 (en) | HIGH-FIXED POWDER METALLURGICAL TOOL STEEL AND ITEM OBTAINED THEREFROM | |
EP0341643B1 (en) | Corrosion-resistant cold-worked steel and composite containing a matrix of this cold-worked steel and a hard material | |
DE3001761C2 (en) | Use of a cobalt-free high-speed steel for cutting tools | |
EP0733719B1 (en) | Iron base alloy for use at high temperature | |
EP0719349B1 (en) | Process of producing sintered articles |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19890621 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE ES FR GB IT LI LU NL SE |
|
17Q | First examination report despatched |
Effective date: 19910731 |
|
ITF | It: translation for a ep patent filed | ||
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE ES FR GB IT LI LU NL SE |
|
REF | Corresponds to: |
Ref document number: 82595 Country of ref document: AT Date of ref document: 19921215 Kind code of ref document: T |
|
REF | Corresponds to: |
Ref document number: 58902742 Country of ref document: DE Date of ref document: 19921224 |
|
ET | Fr: translation filed | ||
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19921127 |
|
PLBI | Opposition filed |
Free format text: ORIGINAL CODE: 0009260 |
|
26 | Opposition filed |
Opponent name: CRUCIBLE MATERIALS CORPORATION Effective date: 19930818 |
|
NLR1 | Nl: opposition has been filed with the epo |
Opponent name: CRUCIBLE MATERIALS CORPORATION |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2052971 Country of ref document: ES Kind code of ref document: T5 |
|
EPTA | Lu: last paid annual fee | ||
EAL | Se: european patent in force in sweden |
Ref document number: 89890163.2 |
|
PUAH | Patent maintained in amended form |
Free format text: ORIGINAL CODE: 0009272 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: PATENT MAINTAINED AS AMENDED |
|
27A | Patent maintained in amended form |
Effective date: 19960417 |
|
AK | Designated contracting states |
Kind code of ref document: B2 Designated state(s): AT BE CH DE ES FR GB IT LI LU NL SE |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: AEN Free format text: AUFRECHTERHALTUNG DES PATENTES IN GEAENDERTER FORM |
|
NLR2 | Nl: decision of opposition | ||
REG | Reference to a national code |
Ref country code: CH Ref legal event code: NV Representative=s name: PATENTANWALTSBUERO JEAN HUNZIKER Ref country code: CH Ref legal event code: PFA Free format text: BOEHLER GESELLSCHAFT M.B.H. TRANSFER- BOEHLER-UDDEHOLM AKTIENGESELLSCHAFT Ref country code: CH Ref legal event code: PUE Owner name: BOEHLER-UDDEHOLM AKTIENGESELLSCHAFT TRANSFER- BOEH |
|
GBTA | Gb: translation of amended ep patent filed (gb section 77(6)(b)/1977) |
Effective date: 19960529 |
|
ITF | It: translation for a ep patent filed | ||
ET3 | Fr: translation filed ** decision concerning opposition | ||
NLR3 | Nl: receipt of modified translations in the netherlands language after an opposition procedure | ||
REG | Reference to a national code |
Ref country code: ES Ref legal event code: DC2A Kind code of ref document: T5 Effective date: 19960716 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: TP |
|
NLS | Nl: assignments of ep-patents |
Owner name: BOEHLER EDELSTAHL GMBH;ALPHA EDELSTAHL GMBH;BOEHLE |
|
NLT1 | Nl: modifications of names registered in virtue of documents presented to the patent office pursuant to art. 16 a, paragraph 1 |
Owner name: BOEHLER GMBH |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: DC2A Kind code of ref document: T5 Effective date: 19960716 |
|
BECA | Be: change of holder's address |
Free format text: 960531 *BOHLER EDELSTAHL G.M.B.H.:MARIAZELLERSTRASSE 25, A-8605 KAPFENBERG |
|
BECH | Be: change of holder |
Free format text: 960531 *BOHLER EDELSTAHL G.M.B.H.:MARIAZELLERSTRASSE 25, A-8605 KAPFENBERG |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: PC2A |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: 732E |
|
EUG | Se: european patent has lapsed | ||
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 20050615 Year of fee payment: 17 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: LU Payment date: 20050621 Year of fee payment: 17 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 20050704 Year of fee payment: 17 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20060614 Year of fee payment: 18 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20060630 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20070101 |
|
NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 20070101 |
|
BERE | Be: lapsed |
Owner name: *BOHLER EDELSTAHL G.M.B.H. Effective date: 20060630 |
|
EUG | Se: european patent has lapsed | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20070615 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20060614 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 20080613 Year of fee payment: 20 Ref country code: ES Payment date: 20080627 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 20080616 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20080625 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20080620 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20080613 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20080620 Year of fee payment: 20 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: PE20 Expiry date: 20090613 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20090615 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20090615 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20090613 |