EP0141804B1 - Manganhartstahl und Verfahren zu seiner Herstellung - Google Patents
Manganhartstahl und Verfahren zu seiner Herstellung Download PDFInfo
- Publication number
- EP0141804B1 EP0141804B1 EP84890187A EP84890187A EP0141804B1 EP 0141804 B1 EP0141804 B1 EP 0141804B1 EP 84890187 A EP84890187 A EP 84890187A EP 84890187 A EP84890187 A EP 84890187A EP 0141804 B1 EP0141804 B1 EP 0141804B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- manganese
- temperature
- weight
- melt
- content
- 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.)
- Expired
Links
- 229910000617 Mangalloy Inorganic materials 0.000 title claims description 16
- 238000000034 method Methods 0.000 title claims description 11
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 19
- 229910052748 manganese Inorganic materials 0.000 claims description 19
- 239000011572 manganese Substances 0.000 claims description 19
- 239000000155 melt Substances 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 10
- 238000005482 strain hardening Methods 0.000 claims description 9
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 8
- 239000010936 titanium Substances 0.000 claims description 8
- 229910052719 titanium Inorganic materials 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 229910000914 Mn alloy Inorganic materials 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 229910052720 vanadium Inorganic materials 0.000 claims description 7
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 6
- 239000011651 chromium Substances 0.000 claims description 6
- 229910052698 phosphorus Inorganic materials 0.000 claims description 6
- 239000011574 phosphorus Substances 0.000 claims description 6
- 239000000654 additive Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 239000011733 molybdenum Substances 0.000 claims description 4
- 238000010079 rubber tapping Methods 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 3
- QFGIVKNKFPCKAW-UHFFFAOYSA-N [Mn].[C] Chemical compound [Mn].[C] QFGIVKNKFPCKAW-UHFFFAOYSA-N 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 229910000616 Ferromanganese Inorganic materials 0.000 claims 1
- 229910001200 Ferrotitanium Inorganic materials 0.000 claims 1
- 239000004411 aluminium Substances 0.000 claims 1
- 229910052782 aluminium Inorganic materials 0.000 claims 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 239000000356 contaminant Substances 0.000 claims 1
- 230000001419 dependent effect Effects 0.000 claims 1
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 239000001301 oxygen Substances 0.000 claims 1
- 238000005266 casting Methods 0.000 description 24
- 229910001566 austenite Inorganic materials 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 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 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 235000014380 magnesium carbonate Nutrition 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-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
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
Definitions
- the invention relates to a strain-hardening austenitic manganese steel (Hadfield steel) with an elongation at break of 10 - 80% and to a method for the production.
- Hadfield steel strain-hardening austenitic manganese steel
- Cold-hardening austenitic manganese steels have a large area of application in the form of castings, forgings and rolled products. This large area of application results above all from its own high ductility and its good work hardening capacity. The applications range from castings for hard crushing to bulletproof objects.
- the valuable properties of high manganese steel result from the combination of the properties mentioned above, namely work hardening and ductility. Strain hardening occurs whenever high manganese steel is subjected to mechanical stress e.g. B. is exposed by impact or shock, which partially converts the austenite in the surface zone to an e-martensite. Strain hardening measurements show an increase in hardness of 200 - 550 HB.
- the steel is essentially austenitic and work hardenable over its entire cross-section, there are great differences in its mechanical properties, in particular ductility, due to these structural differences.
- Manganese steels usually have a carbon content of 0.7 to 1.7% by weight, with a manganese content between 5 and 18% by weight.
- a carbon-manganese ratio between 1: 4 and 1:14 is also important if the properties of the manganese steels are to be retained. At lower ratios, there is no longer any austenitic steel, the steel can no longer be work hardened and the toughness is also impaired. The austenite is too stable at higher ratios; cold work hardening is not possible here either and the desired properties cannot be achieved either.
- a phosphorus content of more than 0.1% by weight leads to a strong reduction in toughness, so that, as is known, a particularly low phosphorus content is desirable.
- ASTM A 128/64 describes four different types of manganese steel with carbon contents between 0.7 and 1.45% by weight and manganese contents between 11 and 14% by weight.
- the carbon content varies to change the degree of work hardening; this can also be influenced by the addition of chromium in amounts of 1.5 to 2.5% by weight. Large carbide deposits can be avoided by adding molybdenum up to 2.5% by weight.
- a nickel addition of max. 4.0% by weight is said to stabilize the austenite, thereby avoiding the formation of pearlite in thick-walled castings.
- manganese steel with approximately 5% by weight manganese is known. Although these steels are low in toughness, they are wear-resistant.
- the object of the invention is to provide a method for producing hard manganese steel, wherein such a structure of the casting and the part made therefrom is achieved, so that on the one hand good mechanical properties, such as tensile strength and elongation at break, are guaranteed, while the work hardening is optimized , and on the other hand, temperature control of the melt is permitted such that the greatest possible output can be achieved.
- Another object of the present invention is to match the level of properties between the edge and core zones as much as possible, since the stability of such a cast is also borne by the core zone, since this is also subject to strong mechanical or abrasive stresses during material removal.
- the carbon-manganese ratio is between 1: 4 and 1:14 and the content of microalloying elements in% by weight titanium is more than 0.05 to 0.09, vanadium 0 to 0, 05, remainder iron and melting-related impurities, an insert being melted in an electric furnace, after which calcareous slag-forming additives are added to the liquid melt, the desired composition is adjusted and brought to a tapping temperature of 1450 to 1600 ° C., deoxidized with an oxygen-affine element , and is tapped into the ladle, and the content of microalloying elements is adjusted in the ladle, the melt being poured at a temperature between 1420 and 1520 ° C, consists essentially in the addition of manganese or manganese alloy in two steps takes place, the second addition of 5 to 25 wt .-% of the total addition of manganese or manganese alloy at a temperature of the melt takes place below 1520 ° C and the melt temperature is kept below this temperature until casting.
- Example 1 is to be regarded as a comparative example because the process described therein represents the prior art.
- the melt was covered with a slag consisting of 90% by weight limestone and 10% by weight calcium fluoride; then the melt was brought to a tapping temperature of 1520 ° C. The final deoxidation was then carried out with metallic aluminum. After deoxidation, the melt was poured into the ladle, where the temperature was measured at 1460 ° C. The melt was poured into a basic sand mold (magnesite). The casting obtained was a Turas with a gross weight of 14 t and a net weight of 11 t; its walls were between 60 and 180 mm thick.
- the casting was allowed to cool to room temperature, removed from the mold and then slowly warmed again to 1050 ° C. After a four hour hold, the Turas was quenched in water.
- the casting obtained in this way showed cracks that had to be sealed with a material of the same type by welding.
- the tensile strength was 623 N / mm 2 (the test results from the transcrystalline material are given in the table).
- Titanium (the content in the casting was 0.07% by weight) was added. The temperature of the melt was always kept below 1490 ° C. Round bars with a diameter of 110 mm were then cast at a casting temperature of 1460 ° C. After cooling, the bars were removed from the molds, heated to 1030 ° C and then held at this temperature for five hours.
- the oven temperature was then lowered to 980 ° C and held at that level for 1 1/2 hours.
- the bars were then quenched in a water bath.
- Example 5 500 kg of manganese steel with the composition as in Example 5 was melted by the same procedure as in Example 5, except that vanadium was added to the ladle and not to the induction furnace.
- the grain size of vanadium was 1/8 to 1/4 inch. (3.10 mm to 6.35 mm)
- the following table shows the values of tensile strength and elongation at break for samples from the center and for those from the edge area according to the examples.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Heat Treatment Of Steel (AREA)
- Materials For Medical Uses (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000439018A CA1221560A (en) | 1983-10-14 | 1983-10-14 | Work-hardenable austenitic manganese steel and method for the production thereof |
| CA439018 | 1983-10-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0141804A1 EP0141804A1 (de) | 1985-05-15 |
| EP0141804B1 true EP0141804B1 (de) | 1988-04-27 |
Family
ID=4126274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP84890187A Expired EP0141804B1 (de) | 1983-10-14 | 1984-10-11 | Manganhartstahl und Verfahren zu seiner Herstellung |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0141804B1 (no) |
| JP (1) | JPS6096750A (no) |
| KR (1) | KR850003907A (no) |
| AU (1) | AU575344B2 (no) |
| CA (1) | CA1221560A (no) |
| ES (1) | ES8506361A1 (no) |
| NO (1) | NO163289C (no) |
| PH (1) | PH21553A (no) |
| ZA (1) | ZA847371B (no) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT390806B (de) * | 1983-09-23 | 1990-07-10 | Kos Bernd | Austenitischer manganhartstahl und verfahren zu seiner herstellung |
| FR2795754B1 (fr) * | 1999-07-02 | 2004-10-08 | Thyssen Schienen Technik Gmbh | Rail de chemin de fer en acier presentant des caracteristiques ameliorees, en particulier rail de pointe d'aiguille, et procede de fabrication d'un tel rail |
| US6572713B2 (en) * | 2000-10-19 | 2003-06-03 | The Frog Switch And Manufacturing Company | Grain-refined austenitic manganese steel casting having microadditions of vanadium and titanium and method of manufacturing |
| KR100852497B1 (ko) * | 2007-03-12 | 2008-08-18 | 한양대학교 산학협력단 | 내식내마모성 철계 합금 및 그 제조방법 |
| TWI450973B (zh) * | 2011-05-19 | 2014-09-01 | China Steel Corp | 煉鋼製程 |
| CN103498107A (zh) * | 2013-10-22 | 2014-01-08 | 江苏盛伟模具材料有限公司 | 耐高温高硼高铬低碳耐磨合金钢及其制备方法 |
| CN103498108A (zh) * | 2013-10-22 | 2014-01-08 | 江苏盛伟模具材料有限公司 | 具有良好红硬性的高硼高铬低碳耐磨合金钢及其制备方法 |
| CN103572166A (zh) * | 2013-10-22 | 2014-02-12 | 江苏盛伟模具材料有限公司 | 具有良好红硬性的含硼高速钢及其制备方法 |
| CN103540855A (zh) * | 2013-10-25 | 2014-01-29 | 丁家伟 | 高强韧高硼中铬低碳耐磨合金钢及其制备方法 |
| KR102145761B1 (ko) * | 2019-01-03 | 2020-08-19 | (주)영신특수강 | 파쇄기용 고망간 주조합금강 및 그 제조방법 |
| CN113088809B (zh) * | 2021-02-26 | 2022-04-05 | 舞阳钢铁有限责任公司 | 一种btw耐磨钢钢板及其生产方法 |
| CN113444985B (zh) * | 2021-05-24 | 2022-10-21 | 北京中永业科技有限公司 | 一种钢铁材料及其制备方法 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0143873A1 (de) * | 1983-09-23 | 1985-06-12 | Bernd Dipl.-Ing. Kos | Austenitischer Manganhartstahl und Verfahren zu seiner Herstellung |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1187023A (en) * | 1966-05-09 | 1970-04-08 | Hadfields Ltd | Improvements in Wear-Resisting Steel. |
| SU322399A1 (no) * | 1970-07-03 | 1971-11-30 | ||
| SU610879A1 (ru) * | 1976-05-24 | 1978-06-15 | Уральский научно-исследовательский институт черных металлов | Сталь |
| SU581165A1 (ru) * | 1976-06-16 | 1977-11-25 | Уральский научно-исследовательский институт черных металлов | Износостойка сталь |
| GB1546282A (en) * | 1977-09-06 | 1979-05-23 | Raufoss Ammunisjonsfabrikker | Austenitic wear-restistant steel |
-
1983
- 1983-10-14 CA CA000439018A patent/CA1221560A/en not_active Expired
-
1984
- 1984-09-14 AU AU33060/84A patent/AU575344B2/en not_active Ceased
- 1984-09-19 ZA ZA847371A patent/ZA847371B/xx unknown
- 1984-09-24 KR KR1019840005850A patent/KR850003907A/ko not_active Application Discontinuation
- 1984-10-05 NO NO844007A patent/NO163289C/no unknown
- 1984-10-11 EP EP84890187A patent/EP0141804B1/de not_active Expired
- 1984-10-11 ES ES536710A patent/ES8506361A1/es not_active Expired
- 1984-10-12 JP JP59212755A patent/JPS6096750A/ja active Pending
- 1984-10-12 PH PH31331A patent/PH21553A/en unknown
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0143873A1 (de) * | 1983-09-23 | 1985-06-12 | Bernd Dipl.-Ing. Kos | Austenitischer Manganhartstahl und Verfahren zu seiner Herstellung |
Also Published As
| Publication number | Publication date |
|---|---|
| NO844007L (no) | 1985-04-15 |
| AU575344B2 (en) | 1988-07-28 |
| ZA847371B (en) | 1985-05-29 |
| EP0141804A1 (de) | 1985-05-15 |
| ES536710A0 (es) | 1985-07-01 |
| KR850003907A (ko) | 1985-06-29 |
| NO163289B (no) | 1990-01-22 |
| NO163289C (no) | 1990-05-02 |
| AU3306084A (en) | 1985-04-18 |
| ES8506361A1 (es) | 1985-07-01 |
| PH21553A (en) | 1987-12-11 |
| JPS6096750A (ja) | 1985-05-30 |
| CA1221560A (en) | 1987-05-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0091897B1 (de) | Kaltverfestigender austenitischer Manganhartstahl und Verfahren zur Herstellung desselben | |
| DE69427189T3 (de) | Hochfeste, abriebsresistente schiene mit perlitstruktur und verfahren zu deren herstellung | |
| DE69422146T2 (de) | GEGEN VERSCHLEISS UND FRESSEN WIDERSTANDSFäHIGE WALZE ZUM WARMWALZEN | |
| DE3018537C2 (no) | ||
| DE69517927T2 (de) | Verfahren zum Herstellen titanhaltiger Stähle und nach diesem Verfahren hergestellte Stähle | |
| DE69824419T2 (de) | Hochfester, ausscheidungshärtbarer, rostfreier stahl mit guter zähigkeit | |
| EP0141804B1 (de) | Manganhartstahl und Verfahren zu seiner Herstellung | |
| DE102005027258A1 (de) | Hochkohlenstoffhaltiger Stahl mit Superplastizität | |
| US3904447A (en) | Method for producing steel materials for large heat-input welding | |
| DE1483218C3 (de) | Verfahren zum Herstellen eines warmfesten, ferritischen Cr-Mo-V-Stahles mit hoher Zeitstandfestigkeit und verbesserter Zeitbruchdehnung | |
| DE69330035T2 (de) | Eisenmetallgusswerkstoffe, insbesondere für walzrollen | |
| DE69824131T2 (de) | Ferritischer Chromstahl | |
| EP2441853B1 (de) | Verfahren zur Herstellung von Werkzeugen aus legiertem Stahl und Werkzeuge insbesondere zur spanabhebenden Bearbeitung von Metallen | |
| DE1808515A1 (de) | Gusseisen mit Kugelgraphit | |
| AT390806B (de) | Austenitischer manganhartstahl und verfahren zu seiner herstellung | |
| DE2607511A1 (de) | Ausscheidungshaertbare, nitridierte aluminiumlegierungen und nitridierte mutterlegierungen dafuer | |
| DE2734408C2 (de) | Verfahren zur Herstellung von Schnellarbeitswerkzeugen | |
| DE2611247C3 (de) | Herstellungsverfahren für Gußeisen | |
| DE102008050152B4 (de) | Hochfeste, duktile Gusseisenlegierung mit Kugelgraphit sowie Verfahren zu deren Herstellung | |
| DD295195A5 (de) | Verschleissfeste stahllegierung | |
| AT390807B (de) | Austenitischer manganhartstahl und verfahren zu seiner herstellung | |
| DE69938617T2 (de) | Stahl für Giessformen und Verfahren zur Herstellung | |
| EP3458623B1 (de) | Verfahren zum herstellen eines stahlwerkstoffs und stahlwerksstoff | |
| DE2758330B1 (de) | Schnellarbeitsstahl | |
| DE2757114A1 (de) | Verfahren zum herstellen hochfesten kugelgraphitgusses |
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 |
|
| AK | Designated contracting states |
Designated state(s): BE FR GB IT |
|
| 17P | Request for examination filed |
Effective date: 19851024 |
|
| 17Q | First examination report despatched |
Effective date: 19861114 |
|
| R17C | First examination report despatched (corrected) |
Effective date: 19870519 |
|
| 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): BE FR GB IT |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) | ||
| ET | Fr: translation filed | ||
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed | ||
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19900903 Year of fee payment: 7 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19900907 Year of fee payment: 7 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 19901002 Year of fee payment: 7 |
|
| ITTA | It: last paid annual fee | ||
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Effective date: 19911011 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Effective date: 19911031 |
|
| BERE | Be: lapsed |
Owner name: VEREINIGTE EDELSTAHLWERKE A.G. VEW Effective date: 19911031 |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee | ||
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Effective date: 19920630 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |