EP0918099A1 - Acier en chrome-manganèse - Google Patents
Acier en chrome-manganèse Download PDFInfo
- Publication number
- EP0918099A1 EP0918099A1 EP98120088A EP98120088A EP0918099A1 EP 0918099 A1 EP0918099 A1 EP 0918099A1 EP 98120088 A EP98120088 A EP 98120088A EP 98120088 A EP98120088 A EP 98120088A EP 0918099 A1 EP0918099 A1 EP 0918099A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- steel alloy
- nickel
- cobalt
- nitrogen
- manganese
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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- 229910045601 alloy Inorganic materials 0.000 title claims description 8
- 239000000956 alloy Substances 0.000 title claims description 8
- 229910000617 Mangalloy Inorganic materials 0.000 title claims description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 60
- 229910000851 Alloy steel Inorganic materials 0.000 claims abstract description 39
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 31
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 22
- 239000010941 cobalt Substances 0.000 claims abstract description 22
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052802 copper Inorganic materials 0.000 claims abstract description 21
- 239000010949 copper Substances 0.000 claims abstract description 21
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 19
- 239000011651 chromium Substances 0.000 claims abstract description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 18
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 18
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 18
- 239000011733 molybdenum Substances 0.000 claims abstract description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 11
- 239000010703 silicon Substances 0.000 claims abstract description 11
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 9
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000011593 sulfur Substances 0.000 claims abstract description 9
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 9
- 239000010936 titanium Substances 0.000 claims abstract description 9
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 9
- 229910052742 iron Inorganic materials 0.000 claims abstract description 8
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 5
- 239000011574 phosphorus Substances 0.000 claims abstract description 5
- 239000012535 impurity Substances 0.000 claims abstract description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 45
- 229910052757 nitrogen Inorganic materials 0.000 claims description 25
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 10
- 229910052758 niobium Inorganic materials 0.000 claims description 8
- 239000010955 niobium Substances 0.000 claims description 8
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 8
- 229910052720 vanadium Inorganic materials 0.000 claims description 8
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 8
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 6
- 229910052748 manganese Inorganic materials 0.000 claims description 6
- 239000011572 manganese Substances 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 4
- 229910052796 boron Inorganic materials 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 2
- XCNJCXWPYFLAGR-UHFFFAOYSA-N chromium manganese Chemical compound [Cr].[Mn].[Mn].[Mn] XCNJCXWPYFLAGR-UHFFFAOYSA-N 0.000 claims 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 abstract description 12
- 230000007797 corrosion Effects 0.000 description 10
- 238000005260 corrosion Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 238000001816 cooling Methods 0.000 description 8
- 229910001566 austenite Inorganic materials 0.000 description 7
- 230000008030 elimination Effects 0.000 description 7
- 238000003379 elimination reaction Methods 0.000 description 7
- 238000000137 annealing Methods 0.000 description 6
- 239000007943 implant Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000005482 strain hardening Methods 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- 210000000988 bone and bone Anatomy 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
- 230000029142 excretion Effects 0.000 description 3
- 229910000734 martensite Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- VEQPNABPJHWNSG-UHFFFAOYSA-N Nickel(2+) Chemical compound [Ni+2] VEQPNABPJHWNSG-UHFFFAOYSA-N 0.000 description 2
- CXOWYMLTGOFURZ-UHFFFAOYSA-N azanylidynechromium Chemical compound [Cr]#N CXOWYMLTGOFURZ-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000006735 deficit Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910001453 nickel ion Inorganic materials 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 210000004243 sweat Anatomy 0.000 description 2
- 210000001519 tissue Anatomy 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- DBIMSKIDWWYXJV-UHFFFAOYSA-L [dibutyl(trifluoromethylsulfonyloxy)stannyl] trifluoromethanesulfonate Chemical compound CCCC[Sn](CCCC)(OS(=O)(=O)C(F)(F)F)OS(=O)(=O)C(F)(F)F DBIMSKIDWWYXJV-UHFFFAOYSA-L 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000000172 allergic effect Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 208000010668 atopic eczema Diseases 0.000 description 1
- RRZKHZBOZDIQJG-UHFFFAOYSA-N azane;manganese Chemical compound N.[Mn] RRZKHZBOZDIQJG-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000000560 biocompatible material Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 235000011010 calcium phosphates Nutrition 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- -1 chromium carbides Chemical class 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000645 desinfectant Substances 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000002848 electrochemical method Methods 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 238000009956 embroidering Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 230000028327 secretion Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052566 spinel group Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000004018 waxing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
Definitions
- the invention relates to a chrome-manganese steel alloy with 12 to 17% manganese, 0.2 to 1.0% silicon, 1 to 3% copper, 2 to 6% cobalt, 3 to 6% molybdenum, 17 up to 22% chromium and 0.5 to 0.9% nitrogen, balance iron including optional alloying elements and contamination caused by melting.
- Low-nickel steel alloys of this type are suitable their high biocompatibility as a material for medical technology, for example for implants medical bodies coming into contact with the human body Instruments as well as for on the human body or jewelry to be worn close to the body.
- Such steel alloys require with regard to adequate corrosion resistance to biological Liquids and secretions as well as to avoid interference in electrical fields, for example in nuclear spin tomography, an austenitic structure.
- nickel is used as an austenite former out of the question because it is in the milieu of the human body corrosion and penetration of nickel ions into the body tissues and, as a result, too toxic reactions is coming.
- the nickel content is more biocompatible Steel alloys are therefore legally limited.
- body-compatible steel alloys sufficient workability and workability own them, for example by cold working without an intermediate annealing to bars, strips, wire, plates and to be able to process bone nails, as well as a mechanical processing, for example by machining, Drilling, embossing and tapping without the risk of Allow surface defects, especially cracks.
- body tolerance depends on that fulfilling a number of biological, metallurgical, chemical and mechanical requirements from.
- Known low-nickel steel alloys are sufficient mostly only in the area of individual properties.
- the invention is based on the problem, the property profile of the aforementioned steel alloy in view to the special requirements of the Medical technology and comparable areas of application noticeably improve.
- the invention achieves this by narrowing the Content ranges for manganese, molybdenum and chromium imperative presence of copper and cobalt as well as a Coordination of the levels of carbon and nitrogen on the one hand and cobalt and copper on the other.
- the steel alloy according to the invention contains 0.08 to 0.25% carbon, at most 0.015% sulfur, at most 0.05% phosphorus, 12 to 17% manganese, 0.2 to 1% Silicon, 1 to 3% copper, 2 to 6% cobalt, at most 0.01% titanium, 3 to 6% molybdenum, 17 to 22% chromium, at most 1.0% nickel, 0.01% aluminum, 0.01% Niobium, 0.01% boron and 0.20% vanadium, 0.5 to 0.9% nitrogen, Balance iron preferably at a ratio of Carbon content to total carbon and Nitrogen from 0.08 to 0.3, preferably 0.1 to 0.25 or also 0.12 to 0.16 and with particular advantage if appropriate also a ratio of the cobalt contents and copper from 1 to 6, preferably 1.5 to 3.5 or also 2 to 2.5.
- the steel alloy has a much better structural stability and allowed within the invention A sufficient or proportionate composition large distance from the two-phase areas (see gray area in the diagram of Fig. 1), i.e. Nickel equivalents over 17, e.g. 18, over 20 or also over 26, behind which there are correspondingly higher ones Chromium, molybdenum, manganese, nitrogen and carbon content as well as the related improvement in for the use of the alloy as a biocompatible Material critical properties, especially one higher corrosion or pitting resistance with high Strength and toughness as well as excellent processability hide.
- a sufficient or proportionate composition large distance from the two-phase areas (see gray area in the diagram of Fig. 1), i.e. Nickel equivalents over 17, e.g. 18, over 20 or also over 26, behind which there are correspondingly higher ones Chromium, molybdenum, manganese, nitrogen and carbon content as well as the related improvement in for the use of the alloy as a biocompatible Material critical properties, especially one higher corrosion or pitting resistance with high Strength and toughness as well as excellent process
- the steel alloy allows cold forming up to 90% and remains completely non-magnetic and sufficient tough.
- the constriction is 70 to 35% with degrees of deformation up to 80%.
- the steel alloy also has a high fatigue strength, for example over 10 load changes at 700 MPa after a 60% Cold forming.
- the steel alloy is completely non-magnetic, has high electrical resistance as well a stable and passive surface; their firmness is 1000 to over 2000 MPa or 2500 MPa, each according to the degree of cold deformation, with good toughness and hardness of up to 630 HV 0.5 and a PREN value of 37 or over 45, preferably over 50; their corrosion resistance shows up in the sea water experiment an electrochemical breakdown potential Ep of over 1000 mV or 1150 mV while the breakthrough potential conventional implant steels at around 750 to 800 mV lies.
- Ep electrochemical breakdown potential
- the high strength allows smaller cross sections and accordingly a lower weight same contour.
- the steel alloy according to the invention preferably contains 0.1 to 0.2% carbon, 0.002 to 0.008% sulfur, 0.002 to 0.01% phosphorus, 14 to 16% manganese, 0.5 to 0.8% silicon, 1.5 to 3% copper, 3 to 5% cobalt, at most 0.01% titanium, 3 to 6% molybdenum, 18 to 22% chromium, at most 0.40% nickel, each at most 0.01% aluminum, Niobium and boron, 0.04 to 0.2% vanadium and 0.7 to 0.9% nitrogen.
- the manganese acts synergistically, although manganese contents of more than 10%, in particular more than 12%, lead to the formation of intermetallic phases and thus to an impairment of the corrosion resistance.
- Cobalt and copper counteract this; they increase the solubility of Cr 2 N and sigma phase in austenite.
- the high structural stability of the steel alloy according to the invention 2 illustrates the diagram of FIG solid cooling curve 1 of a conventional one nickel-free austenitic chrome-manganese-nitrogen steel alloy with 0.08% carbon, 11% manganese, 4% Molybdenum and 0.9% nitrogen and the longer cooling times shifted dashed curve 2 of the invention Steel alloy of example 1 (see below). Furthermore, the diagram shows the Fig. 2, the dark gray bounded by curve 1 ' area of development of harmful elimination phases in the known comparative alloy and the light gray delimited by the dashed curve 2 ' created area of the emergence of elimination phases drawn in the steel alloy according to the invention.
- the diagram shows that the steel alloy according to the invention increasing in the temperature range below 1000 ° C slower cooling and correspondingly larger cross sections allowed without the risk of embrittlement through excretion phases. This is primarily to be attributed to the fact that in the Steel alloy cobalt and copper especially in the area marked by their quantity ratio the solubility of the chromium nitride and the sigma phase improve and at the same time the solubility limit raise to the extent that the risk of emergence is more harmful Elimination phases are significantly lower.
- the previously required high cooling rates of for example 200 ° C / min decrease on average less than half, and solution annealing can help Temperatures from 1100 ° C to 1150 ° C take place.
- cobalt is chromium, molybdenum and Spinels containing cobalt favor one Inertization of the surface in the form of a stable Passivation layer and thus an increase in corrosion resistance, but also better adherence for example in the case of a titanium coating as a carrier layer for a coating of hydroxyappatite or Effect calcium phosphate.
- the improved corrosion resistance of the invention Steel alloy compared to known materials illustrates the diagram of Fig. 3.
- the Measurements were made using the "anodic current density method" carried out, in which the current rise as Function of the applied potential was measured.
- electrochemical measurement which is carried out so that a potentiostat Potential of the sample connected as a working electrode to a predetermined value relative to a reference electrode regulates.
- the current to be measured flows between the working electrode and a counter electrode and is recorded with a writer.
- the measurements were in a glass container with a saline solution performed at 40 ° C.
- the good corrosion resistance prevents Nickel ions under the influence of human sweat get into the human body and become allergic Lead reactions.
- the tensile strength results from the diagram in FIG. 4 the steel alloy according to the invention of the example 1 depending on their degree of deformation during cold forming.
- the steel alloy according to the invention can be at atmospheric pressure melt in the induction furnace. Doing so preferably produces a high-chrome premelt, into which molybdenum, copper and cobalt were introduced one after the other become. Then manganese nitride is melted with a nitrogen content above 6% in portions of not more than 2% of the operating weight.
- the tapping temperature is preferably 100 to 120 ° C the liquidus temperature.
- the steel alloy according to the invention is preferably ascending in a preheated Shed mold. After an equalization anneal at 1150 up to 1250 ° C the casting block can be - if necessary an electric slag remelting (ESR) - by forging and / or hot-rolling into a primary material.
- ESR electric slag remelting
- the nitrogen can also be gaseous, for example by embroidering on the print Introduce electroslag remelting.
- the tensile strength increased after 56% cold working to 2120 MPa with a constriction of 40% and a hardness of 610 HV.
- the breakthrough potential was in a 1 M sodium chloride solution measured and was Ep> 1230 mV.
- the steel alloy could be machined very well without that gluing and scaling in the Surface were recognizable.
- the surface was smooth and glittering. This also resulted in thread cutting a smooth and flawless surface.
- Another test alloy was used in the same way with 18.5% chromium, 15.4% manganese, 0.18% nickel, 4.8% Molybdenum, 4.6% cobalt, 2.4% copper, 0.65% silicon, 0.14% carbon, 0.01% niobium, 0.86% nitrogen, 0.004% Sulfur, 0.06% vanadium and 0.01% titanium, balance iron including contamination from melting melted with a nickel equivalent of 23.6, cast and a round bar with a diameter of 56 mm forged.
- the rod became after solution annealing quenched with water at 1130 ° C; he was in quenched state completely non-magnetic and about the entire cross-section free of excretions.
- a steel alloy was also made in the same way with 20.5% chromium, 13.2% manganese, 0.10% nickel, 4.8% Molybdenum, 2.5% cobalt, 1.4% copper, 0.65% silicon, 0.10% carbon, 0.01% niobium, 0.83% nitrogen, 0.004% Sulfur, 0.05% vanadium and 0.01% titanium, balance iron including contamination from melting melted with a nickel equivalent of 20.1, cast and a round bar with a diameter of 56 mm forged.
- the staff was also at Annealed at 1130 ° C and quenched with water; he was complete non-magnetic and showed over the entire cross section no elimination phases.
- the cutting behavior corresponded to that of the steel alloy Example 2 with a slightly better surface gloss.
- the steel alloy according to the invention fulfills the initially mentioned requirements and is suitable due to their special combination of properties especially as Material for medical technology or for with the human body, especially human sweat objects in contact such as coins, prostheses, Implants, dental wires, bone nails, plates, surgical Instruments, drills and needles, jewelry and Spectacle frames as well as for hospital and laboratory installations, Cutlery, kitchen utensils and utility models, where it depends on the combination of properties described arrives.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP98120088A EP0918099A1 (fr) | 1997-10-27 | 1998-10-24 | Acier en chrome-manganèse |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP97810795 | 1997-10-27 | ||
| EP97810795 | 1997-10-27 | ||
| EP98120088A EP0918099A1 (fr) | 1997-10-27 | 1998-10-24 | Acier en chrome-manganèse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0918099A1 true EP0918099A1 (fr) | 1999-05-26 |
Family
ID=26148088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98120088A Ceased EP0918099A1 (fr) | 1997-10-27 | 1998-10-24 | Acier en chrome-manganèse |
Country Status (1)
| Country | Link |
|---|---|
| EP (1) | EP0918099A1 (fr) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014106306A1 (de) * | 2014-05-06 | 2015-11-12 | Hans-Joachim Bergfeld | Verfahren zur Herstellung eines Schmuckteiles |
| EP4014950A1 (fr) | 2020-12-18 | 2022-06-22 | Deutsche Edelstahlwerke Specialty Steel GmbH & Co. KG | Acier à structure austénitique et utilisation d'un tel acier pour des applications dans la bouche d'un humain ou d'un animal |
| CN117587283A (zh) * | 2023-11-24 | 2024-02-23 | 山东钢铁集团永锋临港有限公司 | 一种高氮低硅锰合金钢材制备方法 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2534513A1 (de) * | 1974-08-02 | 1976-02-12 | Firth Brown Ltd | Rostfreie austenitstaehle |
| EP0432434A1 (fr) * | 1989-12-07 | 1991-06-19 | Vereinigte Schmiedewerke Gmbh | Procédé de fabrication d'éléments d'assemblage en acier Cr-Mn ayant une structure complètement austénitique. |
| EP0640695A1 (fr) * | 1992-07-07 | 1995-03-01 | BÖHLER Edelstahl GmbH | Alliage résistant à la corrosion, utilisable comme matériau pour articles venant en contact avec des organismes vivants |
| DE19513407C1 (de) * | 1995-04-08 | 1996-10-10 | Vsg En & Schmiedetechnik Gmbh | Verwendung einer austenitischen Stahllegierung für hautverträgliche Gegenstände |
-
1998
- 1998-10-24 EP EP98120088A patent/EP0918099A1/fr not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2534513A1 (de) * | 1974-08-02 | 1976-02-12 | Firth Brown Ltd | Rostfreie austenitstaehle |
| EP0432434A1 (fr) * | 1989-12-07 | 1991-06-19 | Vereinigte Schmiedewerke Gmbh | Procédé de fabrication d'éléments d'assemblage en acier Cr-Mn ayant une structure complètement austénitique. |
| EP0640695A1 (fr) * | 1992-07-07 | 1995-03-01 | BÖHLER Edelstahl GmbH | Alliage résistant à la corrosion, utilisable comme matériau pour articles venant en contact avec des organismes vivants |
| DE19513407C1 (de) * | 1995-04-08 | 1996-10-10 | Vsg En & Schmiedetechnik Gmbh | Verwendung einer austenitischen Stahllegierung für hautverträgliche Gegenstände |
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| CIGADA ET AL: "Corrosion behaviour of high nitrogen stainless steels for biomedical applications", CONFERENCE. COMPATABILITY OF BIOMEDICAL IMPLANTS, vol. 94, no. 19, 23 May 1994 (1994-05-23), pages 185 185, XP002075896 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014106306A1 (de) * | 2014-05-06 | 2015-11-12 | Hans-Joachim Bergfeld | Verfahren zur Herstellung eines Schmuckteiles |
| EP4014950A1 (fr) | 2020-12-18 | 2022-06-22 | Deutsche Edelstahlwerke Specialty Steel GmbH & Co. KG | Acier à structure austénitique et utilisation d'un tel acier pour des applications dans la bouche d'un humain ou d'un animal |
| WO2022128981A1 (fr) | 2020-12-18 | 2022-06-23 | Deutsche Edelstahlwerke Specialty Steel Gmbh & Co. Kg | Acier ayant une structure austénitique et utilisation d'un tel acier pour des applications dans la cavité buccale d'un humain ou d'un animal |
| CN117587283A (zh) * | 2023-11-24 | 2024-02-23 | 山东钢铁集团永锋临港有限公司 | 一种高氮低硅锰合金钢材制备方法 |
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