WO2021185853A1 - Verfahren zur herstellung einer schraube und schraube - Google Patents
Verfahren zur herstellung einer schraube und schraube Download PDFInfo
- Publication number
- WO2021185853A1 WO2021185853A1 PCT/EP2021/056712 EP2021056712W WO2021185853A1 WO 2021185853 A1 WO2021185853 A1 WO 2021185853A1 EP 2021056712 W EP2021056712 W EP 2021056712W WO 2021185853 A1 WO2021185853 A1 WO 2021185853A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- screw
- temperature
- tip
- core
- carbon
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 30
- 229910000734 martensite Inorganic materials 0.000 claims abstract description 16
- 239000000956 alloy Substances 0.000 claims abstract description 10
- 238000010791 quenching Methods 0.000 claims abstract description 10
- 230000000171 quenching effect Effects 0.000 claims abstract description 10
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 8
- 239000012298 atmosphere Substances 0.000 claims abstract description 8
- 229910000975 Carbon steel Inorganic materials 0.000 claims abstract description 5
- 239000010962 carbon steel Substances 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000005096 rolling process Methods 0.000 claims abstract description 4
- 239000012299 nitrogen atmosphere Substances 0.000 claims abstract 3
- 238000000034 method Methods 0.000 claims description 13
- 229910001563 bainite Inorganic materials 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 3
- 229910001562 pearlite Inorganic materials 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- 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
- C21D1/78—Combined heat-treatments not provided for above
- C21D1/785—Thermocycling
-
- 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
- C21D9/0093—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for screws; for bolts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H3/00—Making helical bodies or bodies having parts of helical shape
- B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
-
- 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
- C21D1/06—Surface hardening
-
- 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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
- C21D1/20—Isothermal quenching, e.g. bainitic hardening
-
- 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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
-
- 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
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/76—Adjusting the composition of the atmosphere
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/20—Carburising
- C23C8/22—Carburising of ferrous surfaces
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/80—After-treatment
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/001—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed
- F16B25/0021—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed the material being metal, e.g. sheet-metal or aluminium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B33/00—Features common to bolt and nut
- F16B33/06—Surface treatment of parts furnished with screw-thread, e.g. for preventing seizure or fretting
-
- 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
- C21D2211/001—Austenite
-
- 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
- C21D2211/002—Bainite
-
- 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 method for producing a screw according to the preamble of claim 1, as well as a screw for direct screwing according to the preamble of claim 5.
- EP 3 276 189 A1 describes a screw which, above the screw shaft in the edge area, has a softer bainitic structure than the screw core.
- DE 10 2017 101 931 A1 discloses a screw with a bainitic structure which, in the axial direction, has a bainitic structure in the tip with a lower hardness than in a central region lying in the direction of the head.
- DE 10 2010 055 210 A1 discloses a method for producing a screw with a doubly hardened tip which has a higher carbon content than its tempered martensitic shank area.
- the shaft with the holding area of the thread has a lower tendency to hydrogen embrittlement than the hardened tip.
- the tip of a low-alloy carbon screw is partially carburized, the entire screw is tempered and then the tip is locally hardened again.
- the object of the invention is to provide a faster or more efficient method for producing a screw in which a tip with particularly great hardness can be realized, but the shaft with its head and holding area is less hard and comparatively less susceptible to hydrogen embrittlement is.
- a tip is understood to mean a front region of the screw which extends from the foremost end of the screw in the direction of the head. This is preferably an area which is designed to form a nut thread in a nut part, in particular made of high-strength metallic materials.
- the screw according to the invention is produced by forming a screw from a wire made of low-alloy carbon steel, which in particular has an alloy content of less than 3% of alloy materials. When the screw is manufactured, the thread is rolled on.
- the preferred screw wire is 23MnB4 or 38B2.
- the screw is then heated to an austenitizing temperature, the austenitizing temperature being a temperature at which the respective wire material is in the austenite phase field of its TTT diagram.
- the austenitizing temperature is in particular greater than the As temperature of the wire material.
- the screw After heating to the austenitizing temperature, the screw is quenched to a bainitizing temperature, at which it is held until the screw has a structure containing bainite, especially in the shaft over its cross-section.
- the bainitization temperature is a temperature at which the wire material is in the bainite phase field.
- the quenching duration is chosen so that both ferrite and pearlite formation are prevented during the quenching process.
- the quenching takes place in particular by immersing the screws in a molten salt which is at bainitization temperature.
- a structure containing bainite is present if a structural section under consideration has a significantly measurable bainite content of in particular more than 25%.
- a structural cutout preferably has a size of 0.05 mm 2 .
- the total area of the structural cutouts with a bainite content of more than 25% results in the screw according to the invention in particular a surface area of more than 80% of the cross-sectional area of the screw.
- the screw after the screw has been kept at the bainitizing temperature for a defined period of time, it is cooled below the martensite start temperature, in particular to room temperature, after which the tip of the screw is then locally heated again to an austenitizing temperature. At least the tip of the screw is then subsequently quenched again to below martensite starting temperature, the quenching duration being selected so that the formation of ferrite, pearlite and bainite is largely prevented. As a result, the tip is locally hardened again, especially in the edge zone, whereby an ultra-hard tip can be made available.
- a screw produced according to the invention has a low tendency towards hydrogen embrittlement in the shaft, but can still have an ultra-hard tip.
- the screw can be heated to the austenitizing temperature before the screw is quenched to a bainitizing temperature in a carbon atmosphere that has a carbon content that is higher than the carbon content in the screw, so that a Forms a layer with a higher carbon content than in the core, so that in the edge zone of the screw there is a carbon content that is at least 0.2% greater than in the core area of the screw.
- the screw can be nitrided in the same way. This is particularly useful for wire materials that have a carbon content of less than 0.4%.
- the screw produced in this way can have an insert-bainitic structure in the shaft and head area, in particular in the edge zone, and an ultra-hard martensitic structure in the tip, in particular in the edge zone of the tip.
- the edge zone in particular has a carbon content of 0.6% to 1.5%.
- the screw according to the invention therefore has both great hardness in the tip and great toughness in the shaft, which also shows a low tendency towards hydrogen embrittlement.
- the screw can be tempered after the insert bainitization and after the hardening of the tip.
- the tempering process can preferably take place together with a coating process.
- the coating can be a zinc flake coating.
- the invention relates to a screw with a shaft encompassing the head and a point encompassing the opposite end of the screw, the shaft having a substantially bainitic structure over its cross section and, according to the invention, the screw having a point with a martensitic edge zone.
- the edge zone has a higher carbon content than the core, the difference in concentration being at least 0.2%.
- the shaft can have an essentially tempered bainitic structure in the core and a tempered structure with a higher carbon content than in the core in the edge zone.
- the tip can have a tempered hardened martensitic structure at least in the edge area.
- the screw according to the invention is preferably produced according to the method described above.
- 1 is a schematic sectional view of a screw produced from low-alloy carbon steel by rolling the thread
- FIG 3 shows a schematic sectional view of the screw after the tip has been locally remunerated for use
- FIG. 4 shows a schematic temperature-time diagram of the method according to the invention for setting the screw and tempering the tip for use.
- 1 shows, after a method step, a schematic sectional view of a rolled screw 10 made of conventional screw steel.
- the screw has a shaft 20 encompassing the head and a free screw end which is arranged in the axial direction opposite the head and which is referred to here as the tip 22.
- the screw according to the invention is produced in that, in one process step, the screw is formed from a screw wire made of low-alloy carbon steel, which has an alloy content of less than 3% of alloy materials. In the manufacture of the screw, the thread in particular is rolled on.
- the preferred screw wire is 23MnB4. Such a steel can be processed well in a rolling process.
- edge zone 18 of the tip of the screw 10 a carbon content has been reached which is at least 0.2% greater than in the core of the screw, and in particular between 0.6% and 1.5%.
- the edge zone 12 and the edge zone 18 are only shown schematically in the present illustration and can vary in their depth. As an alternative or in addition to carburizing, nitriding can also take place analogously.
- the screw 10 is quenched to a bainitization temperature, in particular in a molten salt, the bainitization temperature being above the martensite start temperature Ms.
- the screw is kept at the bainitization temperature until the shaft has essentially a bainitic structure 14 over its cross-sectional area.
- the screw 10, according to FIG. 2 has a higher carbon content in the edge layer 12 and in the edge layer 18 than the core.
- An essentially bainitic structure means that at least 80% of the cross-sectional area has a bainitic structure.
- Other microstructures can also be present in isolated cases.
- Fig. 3 shows a schematic sectional view of a screw 10 according to the invention, in which the tip 22 of the screw was locally heated again to an austenitizing temperature and then cooled to a temperature below the martensite start temperature Ms for martensite formation, so that in the tip 22, in particular in the Edge layer 18, a hardened martensitic structure 16 with a carbon content of approx. 1%. This allows an ultra-hard tip to be created.
- FIG. 4 shows a schematic temperature-time diagram of the production method according to the invention.
- the screw is first heated to an austenitizing temperature that is above the A3 temperature. If the wire material does not have a sufficient carbon content of 0.6% to 1.5%, this can be done in a carbon-enriching atmosphere.
- the carbon content of the atmosphere has a higher carbon concentration than the wire material, so that during heating, carbon diffuses from the carbon atmosphere into the edge zone of the screw.
- the screw is then quenched to a bainitizing temperature.
- the bainitization temperature is the temperature at which the wire material is in the bainite phase field of its ZTU diagram.
- the quenching time is chosen so that both ferrite and pearlite formation is prevented during the quenching process.
- the screw is kept at the bainitization temperature until essential parts of the cross section of the screw have a bainite structure.
- the screw is then cooled to room temperature.
- the tip is locally heated again to austenitizing temperature and then quenched again below the martensite start temperature Ms, so that a martensitic structure is created at least in the edge zone of the tip.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Engineering & Computer Science (AREA)
- Heat Treatment Of Articles (AREA)
- Transmission Devices (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2022554596A JP2023529250A (ja) | 2020-03-16 | 2021-03-16 | ねじの製造方法及びねじ |
KR1020227034447A KR20220151653A (ko) | 2020-03-16 | 2021-03-16 | 나사 제조 방법 및 나사 |
CN202180021299.7A CN115605619A (zh) | 2020-03-16 | 2021-03-16 | 用于制造螺纹件的方法和螺纹件 |
MX2022010914A MX2022010914A (es) | 2020-03-16 | 2021-03-16 | Metodo para producir un tornillo, y tornillo. |
CA3172948A CA3172948A1 (en) | 2020-03-16 | 2021-03-16 | Method for producing a screw, and screw |
EP21716269.2A EP4121571A1 (de) | 2020-03-16 | 2021-03-16 | Verfahren zur herstellung einer schraube und schraube |
BR112022018258A BR112022018258A2 (pt) | 2020-03-16 | 2021-03-16 | Processo para produção de um parafuso e parafuso |
US17/910,917 US20230136145A1 (en) | 2020-03-16 | 2021-03-16 | Method for producing a screw, and screw |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020107194.9 | 2020-03-16 | ||
DE102020107194.9A DE102020107194A1 (de) | 2020-03-16 | 2020-03-16 | Verfahren zur Herstellung einer Schraube und Schraube |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2021185853A1 true WO2021185853A1 (de) | 2021-09-23 |
Family
ID=75377706
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2021/056712 WO2021185853A1 (de) | 2020-03-16 | 2021-03-16 | Verfahren zur herstellung einer schraube und schraube |
Country Status (11)
Country | Link |
---|---|
US (1) | US20230136145A1 (de) |
EP (1) | EP4121571A1 (de) |
JP (1) | JP2023529250A (de) |
KR (1) | KR20220151653A (de) |
CN (1) | CN115605619A (de) |
BR (1) | BR112022018258A2 (de) |
CA (1) | CA3172948A1 (de) |
DE (1) | DE102020107194A1 (de) |
MX (1) | MX2022010914A (de) |
TW (1) | TWI816092B (de) |
WO (1) | WO2021185853A1 (de) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1020536A1 (de) * | 1999-01-13 | 2000-07-19 | Illinois Tool Works Inc. | Schrauben mit ausgewählter Wärmebehandlung und Härtung |
DE102010055210A1 (de) | 2010-12-20 | 2012-06-21 | Ejot Gmbh & Co. Kg | Schraube aus niedrig legiertem Kohlenstoffstahl und Verfahren zur Herstellung einer derartigen Schraube |
EP2594653A1 (de) * | 2011-11-18 | 2013-05-22 | KAMAX Holding GmbH & Co. KG | Ultrahochfeste Schraube mit hohem Streckgrenzverhältnis |
EP2746419A1 (de) * | 2012-12-20 | 2014-06-25 | Sandvik Intellectual Property AB | Bainitstahl für Gesteinsbohrkomponenten |
EP3276189A1 (de) | 2016-07-29 | 2018-01-31 | KAMAX Holding GmbH & Co. KG | Hochfeste schraube mit einer enthärtungsschicht |
DE102017101931A1 (de) | 2017-02-01 | 2018-08-02 | Kamax Holding Gmbh & Co. Kg | Hochfeste Schraube mit einem enthärteten Gewindeende |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19540848A1 (de) | 1995-10-30 | 1997-05-28 | Hettich Ludwig & Co | Schraube und Verfahren zu ihrer Herstellung |
DE10033471C1 (de) | 2000-07-10 | 2001-12-06 | Sfs Ind Holding Ag Heerbrugg | Selbstbohrender Befestiger |
DE10315957A1 (de) | 2003-04-08 | 2004-10-28 | Ejot Gmbh & Co. Kg | Schraube mit einer partiell gehärteten Funktionsspitze und Verfahren zu ihrer Herstellung |
TWI254656B (en) * | 2004-05-28 | 2006-05-11 | Fwu Kuang Entpr Co Ltd | Manufacture method for forging component with 14.99 grade tension |
JP6247477B2 (ja) * | 2012-08-31 | 2017-12-13 | 日東精工株式会社 | 高周波焼入タッピンねじ |
CN108103297B (zh) * | 2018-02-09 | 2019-06-21 | 艾普零件制造(苏州)股份有限公司 | 一种电动工具用高强度螺栓的热处理方法 |
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2020
- 2020-03-16 DE DE102020107194.9A patent/DE102020107194A1/de active Pending
-
2021
- 2021-03-08 TW TW110108182A patent/TWI816092B/zh active
- 2021-03-16 WO PCT/EP2021/056712 patent/WO2021185853A1/de active Application Filing
- 2021-03-16 KR KR1020227034447A patent/KR20220151653A/ko unknown
- 2021-03-16 US US17/910,917 patent/US20230136145A1/en active Pending
- 2021-03-16 JP JP2022554596A patent/JP2023529250A/ja active Pending
- 2021-03-16 BR BR112022018258A patent/BR112022018258A2/pt unknown
- 2021-03-16 CN CN202180021299.7A patent/CN115605619A/zh active Pending
- 2021-03-16 CA CA3172948A patent/CA3172948A1/en active Pending
- 2021-03-16 EP EP21716269.2A patent/EP4121571A1/de active Pending
- 2021-03-16 MX MX2022010914A patent/MX2022010914A/es unknown
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EP1020536A1 (de) * | 1999-01-13 | 2000-07-19 | Illinois Tool Works Inc. | Schrauben mit ausgewählter Wärmebehandlung und Härtung |
DE102010055210A1 (de) | 2010-12-20 | 2012-06-21 | Ejot Gmbh & Co. Kg | Schraube aus niedrig legiertem Kohlenstoffstahl und Verfahren zur Herstellung einer derartigen Schraube |
EP2594653A1 (de) * | 2011-11-18 | 2013-05-22 | KAMAX Holding GmbH & Co. KG | Ultrahochfeste Schraube mit hohem Streckgrenzverhältnis |
EP2746419A1 (de) * | 2012-12-20 | 2014-06-25 | Sandvik Intellectual Property AB | Bainitstahl für Gesteinsbohrkomponenten |
EP3276189A1 (de) | 2016-07-29 | 2018-01-31 | KAMAX Holding GmbH & Co. KG | Hochfeste schraube mit einer enthärtungsschicht |
DE102017101931A1 (de) | 2017-02-01 | 2018-08-02 | Kamax Holding Gmbh & Co. Kg | Hochfeste Schraube mit einem enthärteten Gewindeende |
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Also Published As
Publication number | Publication date |
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TW202136655A (zh) | 2021-10-01 |
MX2022010914A (es) | 2023-01-18 |
KR20220151653A (ko) | 2022-11-15 |
BR112022018258A2 (pt) | 2022-10-25 |
JP2023529250A (ja) | 2023-07-10 |
US20230136145A1 (en) | 2023-05-04 |
CA3172948A1 (en) | 2021-09-23 |
EP4121571A1 (de) | 2023-01-25 |
CN115605619A (zh) | 2023-01-13 |
TWI816092B (zh) | 2023-09-21 |
DE102020107194A1 (de) | 2021-09-16 |
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