WO2015124169A1 - Acier au chrome pour pièces de machines fortement sollicitées à l'usure, en particulier pour matrices à pelleter - Google Patents

Acier au chrome pour pièces de machines fortement sollicitées à l'usure, en particulier pour matrices à pelleter Download PDF

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Publication number
WO2015124169A1
WO2015124169A1 PCT/EP2014/053111 EP2014053111W WO2015124169A1 WO 2015124169 A1 WO2015124169 A1 WO 2015124169A1 EP 2014053111 W EP2014053111 W EP 2014053111W WO 2015124169 A1 WO2015124169 A1 WO 2015124169A1
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optionally
steel
chromium
content
chromium steel
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PCT/EP2014/053111
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German (de)
English (en)
Inventor
Stefan LACHMANN
Igor KARASEVICH
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Schmiedewerke Gröditz Gmbh
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Priority to PCT/EP2014/053111 priority Critical patent/WO2015124169A1/fr
Publication of WO2015124169A1 publication Critical patent/WO2015124169A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • C21D1/32—Soft annealing, e.g. spheroidising
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/38—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for roll bodies
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/008—Martensite

Definitions

  • the invention relates to a chromium steel, in particular a stainless, corrosion-resistant chromium steel containing 12 to 15 wt .-% chromium.
  • the invention relates in particular to such a steel for the production of pelleting matrices.
  • the invention relates to a soft-annealed blank made of a chromium steel, in particular a blank for producing a die ring for a pelleting press, and a die ring for a pelleting press, which is made of such a steel.
  • a variety of different substances is formed as mass to be compacted (molding compound) in pelleting presses into mass products in the form of pellets, for example animal feed, wood, biomass or refuse.
  • the press material to be formed into pellets is pressed in a nip between a pelleting die and a press roll into openings in the pelletizing die.
  • the openings are formed by openings, in particular through holes, through which the molding compound is pressed (pressed) and receives its cross-sectional shape corresponding to the molding cross-section of the opening.
  • Ring-shaped pelleting matrices are also referred to below as pelleting die rings, press die rings or die rings.
  • matrice rings There are two basic forms of matrice rings known: A usually vertically arranged die ring having bores extending from a radially inner annular surface through the ring to a radially outer annular surface cooperates with rollers referred to as pug rolling rollers on the circumferential inner surface of the die ring roll.
  • the holes can, for example, extend radially through the ring.
  • a flat, annular die with bores extending through the ring from an annular disc surface to an annular disc surface opposite the axis of the ring axis cooperates with rollers (rolling rollers) which roll on one of the annular disc surfaces of the die.
  • the holes can, for example, axially parallel to the imaginary ring axis (axis of rotation or axis of symmetry) run through the ring.
  • Pelleting matrices are subject to high abrasive wear and must be replaced regularly.
  • the service life or service life of conventional dies can be, for example, a few days to a few months, depending on the material to be processed and the production output.
  • the requirements are high in terms of compressive strength and wear resistance especially at the opening edge of the openings.
  • the material used for die rings for pelleting machines is a corrosion-resistant, martensitic chrome steel known as X46Crl3, material number 1.4034.
  • a stainless steel with this name has a composition (in wt .-%) from 0.43 to 0.50 C, max. 1.00 Si, up to 1.00 Mn, max. 0.040 P, up to 0.030 S, 12.5 to 14.5 Cr, remainder iron and impurities caused by melting.
  • a sulfur (S) content 0.015 to 0.030 wt% is recommended for this steel.
  • a case hardening steel with this name has a composition (in% by weight) from 0.47 to 0.55 C, max. 0.40 Si, 0.70 to 1.10 Mn, max. 0.025 P, up to 0.025 S, 0.90 to 1.20 Cr, 0.10 to 0.25 V, remainder iron and impurities caused by melting.
  • a tempered steel with this name has a composition (in wt .-%) from 0.17 to 0.22 C, max. 0.40 Si, 1.10 to 1.40 Mn, max. 0.025 P, up to 0.035 S, 1.00 to 1.30 Cr, remainder iron and impurities caused by melting.
  • EP 1 052 304 A1 describes a martensitic chromium steel for glass moldings or plastic molds, having a composition (in% by weight) of 0.2 to 0.4 C, 0.15 to 0.5 Si, 0.15 to 0.6 Mn, 12.0 to 15.0 Cr, max.
  • the hardness should be increased and the long-term tempering behavior improved, and a homogeneous microstructure and a particularly good solubility should be present.
  • Particularly favorable properties should be achieved if the concentration of carbon is 0.25 to 0.30 wt .-%.
  • the chromium steel described is geared to high working temperatures of a molded part, but not to a high resistance to abrasive wear stress.
  • EP 0 721 995 A2 describes a chromium-containing martensitic iron-based alloy for thermally coated plastic molds with high corrosion resistance and / or high gloss polishability, consisting of (in% by weight) 0.25 to 1.0 C, up to 1.0 Si, up to 1, 6 Mn, 0.10 to 0.35 N, to 1.0 Al, to 2.8 Co, 14.0 to 25.0 Cr, 0.5 to 3.0 Mo, to 3.9 Ni, 0, 04 to 0.4 V, to 3.0 W, to 0.18 Nb, to 0.20 Ti, wherein the sum of the concentration of carbon and nitrogen gives a value of 0.5 to 1.2, balance iron and melting impurities.
  • the concentration of chromium is preferably 16.0 to 19.0 wt .-%, the concentration of molybdenum is preferably 0.8 to 1.5 wt .-%.
  • the iron-based alloy contains, for example, 0.02 to 0.45% by weight, preferably 0.20 to 0.30% by weight of sulfur.
  • the described iron-base alloy is designed to achieve a largely isometric dimensional change in a heat treatment of a molded part, and it contains minimum proportions of 0.5 wt .-% molybdenum and 0.04 wt .-% vanadium.
  • JP H 07 278 758 A describes a stainless steel for engine gaskets containing (in% by weight) 0.1-0.5% C, up to 2% Si, up to 5% Mn, 11-18% Cr, up to 0, 01% S, to 0.01% O, 0.01-0.2% N, and up to 0.0005% H.
  • a chromium steel consisting of an alloy in% by weight of:
  • Mn manganese
  • Ni nickel
  • molybdenum (Mo) optionally up to 0.25%
  • Nb niobium
  • Ti titanium
  • V vanadium
  • Remainder iron (Fe) and melting-related, i. unavoidable, impurities Remainder iron (Fe) and melting-related, i. unavoidable, impurities.
  • silicon, manganese, nickel, molybdenum, aluminum, niobium, titanium and vanadium may each be optionally included, in particular as an unavoidable impurity, with the proviso that the respective content is limited to the maximum content specified.
  • the steel having the claimed composition has a low hardness in the as-annealed condition and is therefore suitable for machining, and has high hardness and toughness after hardening or tempering.
  • the material claimed here is distinguished by its corrosion resistance, especially when used for pelleting matrices.
  • the material claimed here is distinguished by its corrosion resistance and higher hardness, especially when used for pelleting matrices.
  • a high hardness and at the same time a high toughness of the matrix material after tempering is advantageous in combination, in particular for good wear resistance, also referred to as wear resistance.
  • the wear stress of a pelleting die is characterized by both abrasion and strong shear forces. While resistance to abrasion can be increased by increased hardness, increased toughness values improve resistance to shear during pressing operations. The service life of a Pelletiermatrize can thus be increased. At the same time, a good machinability of the matrix material in the soft-annealed state, in particular a low hardness, for increasing the service life of the tools in the production of pelleting matrices is of great advantage.
  • the composition of the invention has the particular advantage that the competing, desired for the production of pelleting matrices desired properties without alloying costly alloying elements, such as molybdenum or vanadium, can be achieved, and thus at a content of molybdenum from 0 to 0.25 Wt .-%, and a content of vanadium, which is preferably less than 0.10 wt .-%.
  • This property is of considerable importance for the application of pelletizing matrices for mass products. Because it is not only an improved life of the pelleting matrices, but in their replacement also a high cost of (re) production necessary.
  • molybdenum and / or vanadium are contained in the composition of the alloy, their contents may be arbitrarily small.
  • the content of molybdenum may be 0.01% by weight or less, and / or the content of vanadium may be 0.01% by weight or less.
  • chromium 12 to 15 wt .-% of the steel is resistant to corrosion in normal air atmospheres.
  • a content of carbon of 0.42 to 0.70 wt .-% of the steel is good curable and then has a high martensitic chrome steel wear resistance.
  • the specified composition achieves high hardness and high toughness. Particularly good properties are achieved at a carbon content of 0.43 to 0.55 wt .-%.
  • the content of chromium is preferably 13 to 14% by weight.
  • the content of sulfur is 0.015 to 0.050 wt .-%, preferably 0.020 to 0.035 wt .-%.
  • the contents of niobium and titanium should each be less than 0.05% by weight in order not to impair the toughness of the material by carbonitride precipitations.
  • niobium and / or titanium are contained in the composition of the alloy, their respective contents may also be 0.001 wt% or less.
  • the content of manganese is preferably at least 0.20 wt%, more preferably at least 0.7 wt%.
  • the content of manganese is at most 2 wt .-%, preferably 0.7 to 1.5 wt .-%, more preferably 0.7 to 1 wt .-%.
  • Silicon may optionally be added since a content of, for example, at least 0.10% by weight may be advantageous for achieving the desired properties of a steel according to the invention.
  • Aluminum may optionally be added since a content of, for example, at least 0.005% by weight of aluminum may be advantageous for achieving the desired properties of a steel according to the present invention. If nickel is contained in the composition of the alloy, its content may be arbitrarily small. For example, the content of nickel may be 0.05% by weight or less.
  • the steel in the as-annealed state for example in the form of a ring blank for pelleting matrices, preferably has a Brinell hardness (corresponding to DIN EN ISO 6506-1: 2006-03) of a maximum of 210 HB, preferably a maximum of 200 HB, more preferably a maximum of 190 HB.
  • the steel is thermally annealed after processing to produce the desired pelletizing dies.
  • the steel In the tempered state, especially after tempering with tempering at 250 ° C tempering temperature, the steel preferably has a Rockwell hardness of at least 45 HRC, preferably at least 50 HRC.
  • the steel in the tempered state, in particular after tempering with tempering at 250 ° C. tempering temperature, the steel preferably has a notched impact strength corresponding to impact work (in accordance with SEP 1314: 1999-04) at room temperature of at least 20 J, preferably at least 30 J.
  • Ring blanks in particular ring blanks for die rings for pelleting presses.
  • Blanks in ring form in particular with a rectangular ring cross-section and in particular seamlessly rolled, can be produced, for example, with the following dimensions: outer diameter of at least 20 cm, in particular at least 30 cm; Outer diameter of, for example, a maximum of 300 cm, in particular a maximum of 160 cm; Wall thickness (thickness in the radial direction) of, for example, up to 50 cm; Height (thickness in the direction of the ring axis) of, for example, up to 55 cm, in particular up to 50 cm; Height of, for example, at least 3 cm. , C) _
  • Table 1 shows the investigated materials with their chemical compositions (in% by weight).
  • Alloy 1 corresponds to the composition according to DIN EN 10088 for the material with the abbreviation X46Crl3 and material number 1.4034, wherein a sulfur content of about 0.026 wt .-% was set for machinable products.
  • Alloy 2 has a composition according to the invention wherein, compared to alloy 1, essentially only the content of nitrogen has been adjusted to a value of 0.10% by weight by deliberate addition.
  • Table 2 shows measured values and characteristics of the properties of the alloys shown in Table 1 after a tempering treatment at 1005 ° C with air cooling and tempering at 250 ° C in a laboratory furnace. This treatment corresponds to an exemplary, comparative heat treatment. In the production of pelleting matrices, depending on the manufacturing technology of the die manufacturer, this can be deviated from. Tab. 2
  • test results show by way of example that by setting the nitrogen content in an otherwise substantially unchanged composition both an increase in hardness and a substantial increase in the impact work, ie the toughness, of the tempered steel is achieved.
  • the workability i. the suitability for machining the steel in the as-annealed condition is substantially the same.
  • Alloy 2 can be used to make a die ring for pelleting presses.
  • a seamlessly rolled ring blank in the annealed condition is rotated / milled to the desired final dimensions, and the holes are introduced.
  • the finished ring is tempered and thus maintains its high hardness and toughness.
  • a flat annular die with axially parallel to the ring through the ring holes is made in a similar manner.
  • a hardening effect can also be achieved by surface treatments such as nitriding or carburizing. However, the additional process step required thereby deteriorates the economy of production, in particular for pelleting matrices.
  • pelleting matrices are exposed to continuous, especially abrasive wear. Consequently, the abraded edge layer only increases the wear resistance for a short time.
  • the material presented here retains its properties over the workpiece cross-section through its alloy components.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
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  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
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  • Crystallography & Structural Chemistry (AREA)
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Abstract

L'invention concerne un acier au chrome, composé d'un alliage en % en poids de : 0,42 % à 0,7 % de carbone (C), facultativement jusqu'à 1,0 % de silicium (Si), facultativement jusqu'à 2,0% de manganèse (Mn), 12 % à 15 % de chrome (Cr), facultativement jusqu'à 0,5 % de nickel (Ni), facultativement jusqu'à 0,25 % de molybdène (Mo), 0,08 % jusqu'à 0,20 % d'azote (N), facultativement jusqu'à 0,05 % d'aluminium (Al), facultativement jusqu'à 0,05 % de niobium (Nb), facultativement jusqu'à 0,05 % de titane (Ti), facultativement jusqu'à 0,10 % de vanadium (V), 0,015 % à 0,050 % de soufre (S), le reste étant le fer (Fe) et des impuretés liées à la fusion ; elle concerne aussi une ébauche ayant la forme d'une bague, en particulier une ébauche pour une bague de matrice pour presses à pelleter, ayant un diamètre extérieur d'au moins 20 cm et faite de l'acier au chrome, l'acier au chrome ayant subi un recuit d'adoucissement et étant apte à la trempe; ainsi qu'une bague de matrice de presses à pelleter en acier au chrome martensitique qui possède cette composition.
PCT/EP2014/053111 2014-02-18 2014-02-18 Acier au chrome pour pièces de machines fortement sollicitées à l'usure, en particulier pour matrices à pelleter WO2015124169A1 (fr)

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PCT/EP2014/053111 WO2015124169A1 (fr) 2014-02-18 2014-02-18 Acier au chrome pour pièces de machines fortement sollicitées à l'usure, en particulier pour matrices à pelleter

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07278758A (ja) 1994-04-13 1995-10-24 Nippon Steel Corp エンジンガスケット用ステンレス鋼とその製造方法
EP0721995A2 (fr) 1995-01-16 1996-07-17 BÖHLER Edelstahl GmbH Utilisation d'un alliage ferreux pour la fabrication de formes pour la transformation des matières plastiques
JPH11140593A (ja) * 1997-11-06 1999-05-25 Daido Steel Co Ltd 冷間塑性加工性に優れた高耐食・高寿命ステンレス鋼
EP1052304A1 (fr) 1999-05-10 2000-11-15 Böhler Edelstahl GmbH & Co KG Acier martensitique contenant du chrome résistant à la corrosion
WO2001040526A1 (fr) * 1999-12-02 2001-06-07 Ati Properties, Inc. Acier inoxydable martensitique et procede d'acierage
EP1304393A1 (fr) * 2000-07-17 2003-04-23 Kabushiki Kaisha Riken Segment de piston presentant une resistance elevee a l'erosion, a la fissuration et a la fatigue, procede permettant de produire ce segment et combinaison segment de piston et bloc-cylindres
WO2003069009A1 (fr) * 2002-02-15 2003-08-21 Uddeholm Tooling Aktiebolag Materiau d'acier contenant des carbures et utilisation du materiau
AT411533B (de) * 2002-07-09 2004-02-25 Andritz Ag Maschf Pelletiermatritze und verfahren zur herstellung
DE102010045221A1 (de) * 2010-09-13 2012-03-15 Daimler Ag Stahlkolben für Verbrennungsmotoren
DE102013011996A1 (de) * 2012-07-31 2014-02-06 Taiwan Powder Technologies Co., Ltd Verfahren zum Herstellen gepresster und gesinterter Werkstücke und sich daraus ergebende Werkstücke

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07278758A (ja) 1994-04-13 1995-10-24 Nippon Steel Corp エンジンガスケット用ステンレス鋼とその製造方法
EP0721995A2 (fr) 1995-01-16 1996-07-17 BÖHLER Edelstahl GmbH Utilisation d'un alliage ferreux pour la fabrication de formes pour la transformation des matières plastiques
JPH11140593A (ja) * 1997-11-06 1999-05-25 Daido Steel Co Ltd 冷間塑性加工性に優れた高耐食・高寿命ステンレス鋼
EP1052304A1 (fr) 1999-05-10 2000-11-15 Böhler Edelstahl GmbH & Co KG Acier martensitique contenant du chrome résistant à la corrosion
WO2001040526A1 (fr) * 1999-12-02 2001-06-07 Ati Properties, Inc. Acier inoxydable martensitique et procede d'acierage
EP1304393A1 (fr) * 2000-07-17 2003-04-23 Kabushiki Kaisha Riken Segment de piston presentant une resistance elevee a l'erosion, a la fissuration et a la fatigue, procede permettant de produire ce segment et combinaison segment de piston et bloc-cylindres
WO2003069009A1 (fr) * 2002-02-15 2003-08-21 Uddeholm Tooling Aktiebolag Materiau d'acier contenant des carbures et utilisation du materiau
AT411533B (de) * 2002-07-09 2004-02-25 Andritz Ag Maschf Pelletiermatritze und verfahren zur herstellung
DE102010045221A1 (de) * 2010-09-13 2012-03-15 Daimler Ag Stahlkolben für Verbrennungsmotoren
DE102013011996A1 (de) * 2012-07-31 2014-02-06 Taiwan Powder Technologies Co., Ltd Verfahren zum Herstellen gepresster und gesinterter Werkstücke und sich daraus ergebende Werkstücke

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