CA2686071C - Hot-forming steel alloy - Google Patents
Hot-forming steel alloy Download PDFInfo
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- CA2686071C CA2686071C CA2686071A CA2686071A CA2686071C CA 2686071 C CA2686071 C CA 2686071C CA 2686071 A CA2686071 A CA 2686071A CA 2686071 A CA2686071 A CA 2686071A CA 2686071 C CA2686071 C CA 2686071C
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- 229910000851 Alloy steel Inorganic materials 0.000 title claims abstract description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000011651 chromium Substances 0.000 claims abstract description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 11
- 239000010703 silicon Substances 0.000 claims abstract description 11
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 10
- 239000011733 molybdenum Substances 0.000 claims abstract description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 9
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 9
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 9
- 239000012535 impurity Substances 0.000 claims abstract description 9
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052742 iron Inorganic materials 0.000 claims abstract description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 52
- 239000000956 alloy Substances 0.000 claims description 52
- 238000001816 cooling Methods 0.000 claims description 26
- 239000011572 manganese Substances 0.000 claims description 20
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 9
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 8
- 229910052748 manganese Inorganic materials 0.000 claims description 8
- 239000011575 calcium Substances 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 238000004512 die casting Methods 0.000 claims description 6
- 239000011777 magnesium Substances 0.000 claims description 6
- 239000010955 niobium Substances 0.000 claims description 6
- 239000010936 titanium Substances 0.000 claims description 6
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 229910052787 antimony Inorganic materials 0.000 claims description 3
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 claims description 3
- 229910052785 arsenic Inorganic materials 0.000 claims description 3
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 229910052796 boron Inorganic materials 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052758 niobium Inorganic materials 0.000 claims description 3
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 239000010937 tungsten Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 239000001301 oxygen Substances 0.000 claims 1
- 229910052720 vanadium Inorganic materials 0.000 abstract 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 abstract 1
- 239000000463 material Substances 0.000 description 37
- 235000019589 hardness Nutrition 0.000 description 12
- 238000005496 tempering Methods 0.000 description 12
- 239000000203 mixture Substances 0.000 description 7
- 238000010791 quenching Methods 0.000 description 7
- 230000000171 quenching effect Effects 0.000 description 7
- 239000000126 substance Substances 0.000 description 6
- 229910000734 martensite Inorganic materials 0.000 description 5
- 230000009466 transformation Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005275 alloying Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 229910001563 bainite Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- 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
- 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
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- 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
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
-
- 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing 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
- C22C38/22—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
- C22C38/40—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
Abstract
A hot-forming steel alloy comprising, in addition to iron and impurity elements, carbon, silicon, manganese, chromium, molybdenum, vanadium and nitrogen within the concentration ranges set forth in the claims. This abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention [0002] The present invention relates to a hot-forming steel alloy with high toughness and at the same time a great hardening depth and/or improved martensitic through-hardening capability with a thermal quenching and tempering of products such as, for example, die-casting dies or extrusion dies and the like.
2. Discussion of Background Information [0003] A thermal quenching and tempering of a part, e.g., of hot-forming steel, to adjust a high material hardness at operating temperatures of the part up to about 550 C
and more, essentially means heating the material to a temperature at which it has a cubic face-centered atomic structure or an austenitic structure, followed by a forced cooling to obtain a martensitic structure and a subsequent tempering treatment, optionally multiple times, at temperatures of generally more than about 500 C. During the tempering, on the one hand the stresses in the material formed during the cooling and structural transformation are reduced at least in part, and on the other hand the material hardness is increased or a so-called secondary increase in hardness is achieved due to carbide precipitates.
1. Field of the Invention [0002] The present invention relates to a hot-forming steel alloy with high toughness and at the same time a great hardening depth and/or improved martensitic through-hardening capability with a thermal quenching and tempering of products such as, for example, die-casting dies or extrusion dies and the like.
2. Discussion of Background Information [0003] A thermal quenching and tempering of a part, e.g., of hot-forming steel, to adjust a high material hardness at operating temperatures of the part up to about 550 C
and more, essentially means heating the material to a temperature at which it has a cubic face-centered atomic structure or an austenitic structure, followed by a forced cooling to obtain a martensitic structure and a subsequent tempering treatment, optionally multiple times, at temperatures of generally more than about 500 C. During the tempering, on the one hand the stresses in the material formed during the cooling and structural transformation are reduced at least in part, and on the other hand the material hardness is increased or a so-called secondary increase in hardness is achieved due to carbide precipitates.
[0004] A transformation of an austenitic structure into a martensitic structure, as one skilled in the art is aware, calls for a minimum cooling rate of the material, because this transformation takes place as a diffusionless flip-over process of the atomic structure due to a markedly high subcooling. Lower cooling rates lead to the formation of a bainite or pearlite structure.
[0005] The properties of a material depend on the chemical composition thereof and on the microstructure thereof adjusted by a thermal treatment and produce therefrom a specific property profile of a part.
P37498.S03 [0006] In other words: the chemical composition of a material and the intensity of the cooling or the heat dissipation from the surface during the hardening of the part determine the microstructure in the region of the surface and, due to the rewarming from the interior of the part, the microstructural development depending on the distance from the part surface. The respective local fine structure determines the material properties of the thermally quenched and tempered material locally present.
P37498.S03 [0006] In other words: the chemical composition of a material and the intensity of the cooling or the heat dissipation from the surface during the hardening of the part determine the microstructure in the region of the surface and, due to the rewarming from the interior of the part, the microstructural development depending on the distance from the part surface. The respective local fine structure determines the material properties of the thermally quenched and tempered material locally present.
[0007] For reasons of increasingly economic production of the products, hot-forming materials for die cast molds and the like are subject to increasing stresses through shortened press sequence times and increased casting pressures. Furthermore, complex geometries of the mold cavities are provided to an increasing extent, so that much higher total stresses of the material are present overall. These total stresses can cause tool failure due to stress cracks, fire cracks, coarse fracture, corrosion and erosion, so that materials with a high hardness and strength as well as high toughness and ductility at the same time are required. However, these required properties depend on the chemical composition of the alloy and the tempered properties of the same resulting therefrom.
[0008] Cr-Mo-V steels have long been used for hot-forming tools, wherein the steel types X38 CrMoV 51 and X38 CrMoV 53 according to DIN steel iron list material no.
1.2343 and material no. 1.2367, as also given in the list, are "highly resistant to tempering" and suitable for "tools with large dimensions."
1.2343 and material no. 1.2367, as also given in the list, are "highly resistant to tempering" and suitable for "tools with large dimensions."
[0009] Material no. 1.2343 is used for "highly stressed tools, dies and presses."
[0010] The above materials have a high hardening depth and a deep-reaching tempering quality to required hardness values between 50 and 55 HRC. However, their toughness properties are low, which can be a disadvantage for the wearing qualities of die casting molds.
[0011] With a material no. 1.2343, a considerable increase in the material toughness after a quenching and tempering treatment can be achieved by a reduction of the provided silicon content from 0.90 to 1.20% by weight to a concentration of about 0.2%
by weight, but high cooling rates during hardening are necessary for this, which often cannot be achieved.
{P37498 00822195 DOC) 2 P37498.S03 [0012] It would be advantageous to have available a hot-forming steel alloy of the type mentioned at the outset which forms a largely complete martensitic microstructure during a forced cooling from the austenite range even at low cooling rates, after which a high hardness and improved toughness of the material are achieved through a targeted tempering treatment.
SUMMARY OF THE INVENTION
by weight, but high cooling rates during hardening are necessary for this, which often cannot be achieved.
{P37498 00822195 DOC) 2 P37498.S03 [0012] It would be advantageous to have available a hot-forming steel alloy of the type mentioned at the outset which forms a largely complete martensitic microstructure during a forced cooling from the austenite range even at low cooling rates, after which a high hardness and improved toughness of the material are achieved through a targeted tempering treatment.
SUMMARY OF THE INVENTION
[0013] The present invention provides hot-forming steel alloy. The alloy comprises, in the following elements in % by weight, based on the total weight of the alloy:
Carbon (C) from about 0.35 to about 0.42 Silicon (Si) from about 0.15 to about 0.29 =
Manganese (Mn) from about 0.40 to about 0.70 Chromium (Cr) from about 4.70 to about 5.45 Molybdenum (Mo) from about 1.50 to about 1.95 Vanadium (V) from about 0.40 to about 0.75 Nitrogen (N) from about 0.011 to about 0.016, remainder iron and impurity elements.
Carbon (C) from about 0.35 to about 0.42 Silicon (Si) from about 0.15 to about 0.29 =
Manganese (Mn) from about 0.40 to about 0.70 Chromium (Cr) from about 4.70 to about 5.45 Molybdenum (Mo) from about 1.50 to about 1.95 Vanadium (V) from about 0.40 to about 0.75 Nitrogen (N) from about 0.011 to about 0.016, remainder iron and impurity elements.
[0014] In one aspect of the alloy of the present invention, the maximum concentrations of one or more impurity elements present therein may be as follows:
Phosphorus (P) not more than about 0.005 Sulfur (S) not more than about 0.003 Nickel (Ni) not more than about 0.10 Tungsten (W) not more than about 0.10 Copper (Cu) not more than about 0.10 Cobalt (Co) not more than about 0.10 Titanium (Ti) not more than about 0.008 Niobium (Nb) not more than about 0.03 (P37498 00822195 DOC) 3 P37498.S03 Oxygen (0) not more than about 0.003 Boron (B) not more than about 0.001 Arsenic (As) not more than about 0.01 Tin (Sn) not more than about 0.0025 Antimony (Sb) not more than about 0.01 Zinc (Zn) not more than about 0.001 Calcium (Ca) not more than about 0.0002 Magnesium (Mg) not more than about 0.0002.
Phosphorus (P) not more than about 0.005 Sulfur (S) not more than about 0.003 Nickel (Ni) not more than about 0.10 Tungsten (W) not more than about 0.10 Copper (Cu) not more than about 0.10 Cobalt (Co) not more than about 0.10 Titanium (Ti) not more than about 0.008 Niobium (Nb) not more than about 0.03 (P37498 00822195 DOC) 3 P37498.S03 Oxygen (0) not more than about 0.003 Boron (B) not more than about 0.001 Arsenic (As) not more than about 0.01 Tin (Sn) not more than about 0.0025 Antimony (Sb) not more than about 0.01 Zinc (Zn) not more than about 0.001 Calcium (Ca) not more than about 0.0002 Magnesium (Mg) not more than about 0.0002.
[0015] In yet another aspect of the alloy of the present invention, the alloy may comprise from about 0.37 % to about 0.40 % by weight of C and/or from about 0.16 % to about 0.28 % by weight, e.g., from about 0.18 % to about 0.25 %
by weight of Si and/or from about 0.45 % to about 0.60 % by weight, e.g., from about 0.50 % to about 0.58 %
by weight of Mn and/or from about 4.80 % to about 5.20 % by weight, e.g., from about 4.90 % to about 5.10 % by weight of Cr and/or from about 1.55 % to about 1.90 % by weight, e.g., from about 1.65 % to about 1.80 %
by weight of Mo and/or from about 0.45 % to about 0.70 % by weight, e.g., from about 0.52 % to about 0.60 %
by weight of V and/or from about 0.012 % to about 0.015 % by weight of N.
by weight of Si and/or from about 0.45 % to about 0.60 % by weight, e.g., from about 0.50 % to about 0.58 %
by weight of Mn and/or from about 4.80 % to about 5.20 % by weight, e.g., from about 4.90 % to about 5.10 % by weight of Cr and/or from about 1.55 % to about 1.90 % by weight, e.g., from about 1.65 % to about 1.80 %
by weight of Mo and/or from about 0.45 % to about 0.70 % by weight, e.g., from about 0.52 % to about 0.60 %
by weight of V and/or from about 0.012 % to about 0.015 % by weight of N.
[0016] In a further aspect, the alloy of the present invention may comprise, in % by weight:
Carbon (C) from about 0.37 to about 0.40 Silicon (Si) from about 0.16 to about 0.28 Manganese (Mn) from about 0.45 to about 0.60 Chromium (Cr) from about 4.80 to about 5.20 {P37498 00822195 DOC) 4 P37498.S03 Molybdenum (Mo) from about 1.55 to about 1.90 Vanadium (V) from about 0.45 to about 0.70 Nitrogen (N) from about 0.012 to about 0.015.
Carbon (C) from about 0.37 to about 0.40 Silicon (Si) from about 0.16 to about 0.28 Manganese (Mn) from about 0.45 to about 0.60 Chromium (Cr) from about 4.80 to about 5.20 {P37498 00822195 DOC) 4 P37498.S03 Molybdenum (Mo) from about 1.55 to about 1.90 Vanadium (V) from about 0.45 to about 0.70 Nitrogen (N) from about 0.012 to about 0.015.
[0017] In a still further aspect, the alloy may comprise, in % by weight:
Carbon (C) from about 0.37 to about 0.40 Silicon (Si) from about 0.18 to about 0.25 Manganese (Mn) from about 0.50 to about 0.58 Chromium (Cr) from about 4.90 to about 5.10 Molybdenum (Mo) from about 1.65 to about 1.80 Vanadium (V) from about 0.52 to about 0.60 Nitrogen (N) from about 0.012 to about 0.015.
Carbon (C) from about 0.37 to about 0.40 Silicon (Si) from about 0.18 to about 0.25 Manganese (Mn) from about 0.50 to about 0.58 Chromium (Cr) from about 4.90 to about 5.10 Molybdenum (Mo) from about 1.65 to about 1.80 Vanadium (V) from about 0.52 to about 0.60 Nitrogen (N) from about 0.012 to about 0.015.
[0018] The present invention also provides a part which comprises the alloy of the present invention as set forth above (including the various aspects thereof).
The part may, for example, be a die-casting die or an extruder, or a part of a die-casting die or an extruder.
BRIEF DESCRIPTION OF THE DRAWINGS
The part may, for example, be a die-casting die or an extruder, or a part of a die-casting die or an extruder.
BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The present invention is further described in the detailed description which follows, in reference to the drawings by way of non-limiting examples of exemplary embodiments of the present invention, and wherein:
Fig. 1 is a graph showing impact strength values of tested materials after a thermal quenching and tempering as a function of the cooling parameters in the hardening treatment.
DETAILED DESCRIPTION OF THE PRESENT INVENTION
Fig. 1 is a graph showing impact strength values of tested materials after a thermal quenching and tempering as a function of the cooling parameters in the hardening treatment.
DETAILED DESCRIPTION OF THE PRESENT INVENTION
[0020] The particulars shown herein are by way of example and for purposes of illustrative discussion of the embodiments of the present invention only and are presented in the cause of providing what is believed to be the most useful and readily understood description of the principles and conceptual aspects of the present invention.
In this {P37498 00822195 DOC} 5 P37498.S03 regard, no attempt is made to show structural details of the present invention in more detail than is necessary for the fundamental understanding of the present invention, the description taken with the drawings making apparent to those skilled in the art how the several forms of the present invention may be embodied in practice.
100211 As set forth above, the present invention provides a hot-working steel alloy which comprises the alloying elements in the following concentrations in % by weight, based on the total weight of the alloy:
Carbon (C) from about 0.35 to about 0.42 Silicon (Si) from about 0.15 to about 0.29 Manganese (Mn) from about 0.40 to about 0.70 Chromium (Cr) from about 4.70 to about 5.45 Molybdenum (Mo) from about 1.50 to about 1.95 Vanadium (V) from about 0.40 to about 0.75 Nitrogen (N) from about 0.011 to about 0.016, remainder iron (Fe) and impurity elements.
100221 On of the advantages of the alloy according to the present invention may be seen essentially in that the elements overall, in particular the elements silicon, molybdenum, vanadium and nitrogen, are coordinated with one another in terms of transformation kinetics so that a desired strength and hardness with a high toughness of the material can be achieved with a thermal quenching and tempering with a reduced cooling rate during hardening.
100231 It is thus possible either to achieve greater penetration depths of a martensitic hardness microstructure that is favorable for the mechanical properties of the part with a given cooling rate or advantageously to use a lower cooling rate during a hardening and to thus minimize the hardening strains in a die-casting die, which often is provided with an engraving or with a negative mold of the cast part. This is particularly important because a so-called vacuum hardening of molded parts is being used to an increasing extent, wherein a heating in vacuum also takes place for reasons of avoiding oxidations {P37498 00822195 DOC} 6 P37498.S03 and decarburization of the processed surface of the workpiece or the mold during an austenitization, after which a forced cooling is carried out with a nitrogen gas flow. For this type of hardening of a part, an alloy with the chemical composition according to the present invention has proven to be particularly useful.
[0024] A further significant increase in the toughness properties of the tempered and quenched material can be achieved when the hot-working steel alloy has the follwoing concentrations of one or all of the following impurity elements in % by weight, based on the total weight of the alloy:
Phosphorus (P) not higher than about 0.005 Sulfur (S) not higher than about 0.003 Nickel (Ni) not higher than about 0.10 Tungsten (W) not higher than about 0.10 Copper (Cu) not higher than about 0.10 Cobalt (Co) not higher than about 0.10 Titanium (Ti) not higher than about 0.008 Niobium (Nb) not higher than about 0.03 Oxygen (0) not higher than about 0.003 Boron (B) not higher than about 0.001 Arsenic (As) not higher than about 0.01 Tin (Sn) not higher than about 0.0025 Antimony (Sb) not higher than about 0.01 Zinc (Zn) not higher than about 0.001 Calcium (Ca) not higher than about 0.0002 Magnesium (Mg) not higher than about 0.0002.
100251 The above elements can form either precipitates or compounds which are enriched in particular at the grain boundaries and result in a leap-like reduction of the {P37498 00822195 DOC} 7 P37498.S03 toughness properties of the material once a concentration limit is reached or they cause grain boundary coatings, which likewise have an unfavorable effect.
[0026] Through a chemical composition of the material according to the invention adjusted within relatively narrow limits according to a preferred embodiment of the same, the hot-forming steel alloy may contain one or more of the alloying elements in the following concentrations in % by weight, based on the total weight of the alloy:
Carbon (C) from about 0.37 to about 0.40 Silicon (Si) from about 0.16 to about 0.28, preferably from about 0.18 to about 0.25 Manganese (Mn) from about 0.45 to about 0.60, preferably from about 0.50 to about 0.58 Chromium (Cr) from about 4.80 to about 5.20, preferably from about 4.90 to about 5.10 Molybdenum (Mo) from about 1.55 to about 1.90, preferably from about 1.65 to about 1.80 Vanadium (V) from about 0.45 to about 0.70, preferably from about 0.52 to about 0.60 Nitrogen (N) from about 0.012 to about 0.015, remainder iron (Fe) and impurity elements.
[0027] By means of this alloy according to the invention, which makes particular demands on a smelting technology, it is possible to achieve high toughness values of the material even with low cooling rates in the thermal quenching and tempering process with high material hardnesses.
[0028] The invention is described in more detail below based on test results.
[0029] The test results are illustrated in Fig. 1.
[0030] Alloys with a chemical composition according to the invention and according to DIN material no. 1.2343 with standard-conforming and with reduced Si contents and 1P37498 00822195 DOC) 8 P37498.S03 according to DIN material no. 1.2367, as given in Table I, were examined after a thermal quenching and tempering treatment to a material hardness of 44 HRC with different cooling parameters X during hardening. The value that characterizes the parameter X is calculated as follows:
Cooling parameter [X] corresponds to the time [in sec.] for a cooling from 800 C to 500 C divided by 100.
[0031] The alloying elements of the materials listed in Table I are indicated below, wherein the remainder represents the content of iron and accompanying elements and impurity elements.
Alloy composition in % by weight Material No. C Si Mn P S N Cr Mo Ni V
1.2343 0.39 1.11 0.41 0.021 0.023 - 5.28 1.26 0.21 0.38 1.2343 So 0.38 0.21 0.39 0.022 0.019 - 5.34 1.30 0.16 0.40 1.2367 0.38 0.40 0.47 0.029 0.021 - 5.00 2.98 0.20 0.61 W 350 0.39 0.19 0.51 0.004 0.001 0.013 4.91 1.69 0.06 0.53 [0032] Fig. 1 shows that with a cooling parameter up to approx. X = 12 the material no.
1.2343 with Si contents reduced to approx. 0.20% by weight in a thermally quenched and tempered state to a material hardness of 44 HRC has the highest toughness measured according to Charpy V. However, with increasing cooling parameter X the toughness values subsequently drop sharply to a low level.
100331 The materials no. 1.2343 with standard-conforming Si contents and no.
1.2367 have a lower toughness with a quenched and tempered hardness of 44 HRC, but have a remarkable through-hardening capability, which is documented by only slightly reduced toughness values as a function of the cooling parameter.
(P37498 00822 195 DOC} 9 100341 Although at high cooling rates or in the range of the cooling parameter A up to 13, a test alloy W 350 according to the invention shows slightly lower toughness values at room temperature in the state quenched and tempered to 44 HRC compared to the So material no. 1.2343 (Si 0.2% by weight), the toughness of the material remains essentially unchanged at superior high values even with reduced cooling rates or higher cooling parameters.
[0035] It is noted that the foregoing examples have been provided merely for the purpose of explanation and are in no way to be construed as limiting of the present invention. While the present invention has been described with reference to an exemplary embodiment, it is understood that the words which have been used herein are words of description and illustration, rather than words of limitation.
Changes may be made, within the purview of the appended claims, as presently stated and as amended.
Although the present invention has been described herein with reference to particular means, materials and embodiments, the present invention is not intended to be limited to these particulars; rather, the present invention extends to all functionally equivalent structures, methods and uses, such as are within the scope of the appended claims.
In this {P37498 00822195 DOC} 5 P37498.S03 regard, no attempt is made to show structural details of the present invention in more detail than is necessary for the fundamental understanding of the present invention, the description taken with the drawings making apparent to those skilled in the art how the several forms of the present invention may be embodied in practice.
100211 As set forth above, the present invention provides a hot-working steel alloy which comprises the alloying elements in the following concentrations in % by weight, based on the total weight of the alloy:
Carbon (C) from about 0.35 to about 0.42 Silicon (Si) from about 0.15 to about 0.29 Manganese (Mn) from about 0.40 to about 0.70 Chromium (Cr) from about 4.70 to about 5.45 Molybdenum (Mo) from about 1.50 to about 1.95 Vanadium (V) from about 0.40 to about 0.75 Nitrogen (N) from about 0.011 to about 0.016, remainder iron (Fe) and impurity elements.
100221 On of the advantages of the alloy according to the present invention may be seen essentially in that the elements overall, in particular the elements silicon, molybdenum, vanadium and nitrogen, are coordinated with one another in terms of transformation kinetics so that a desired strength and hardness with a high toughness of the material can be achieved with a thermal quenching and tempering with a reduced cooling rate during hardening.
100231 It is thus possible either to achieve greater penetration depths of a martensitic hardness microstructure that is favorable for the mechanical properties of the part with a given cooling rate or advantageously to use a lower cooling rate during a hardening and to thus minimize the hardening strains in a die-casting die, which often is provided with an engraving or with a negative mold of the cast part. This is particularly important because a so-called vacuum hardening of molded parts is being used to an increasing extent, wherein a heating in vacuum also takes place for reasons of avoiding oxidations {P37498 00822195 DOC} 6 P37498.S03 and decarburization of the processed surface of the workpiece or the mold during an austenitization, after which a forced cooling is carried out with a nitrogen gas flow. For this type of hardening of a part, an alloy with the chemical composition according to the present invention has proven to be particularly useful.
[0024] A further significant increase in the toughness properties of the tempered and quenched material can be achieved when the hot-working steel alloy has the follwoing concentrations of one or all of the following impurity elements in % by weight, based on the total weight of the alloy:
Phosphorus (P) not higher than about 0.005 Sulfur (S) not higher than about 0.003 Nickel (Ni) not higher than about 0.10 Tungsten (W) not higher than about 0.10 Copper (Cu) not higher than about 0.10 Cobalt (Co) not higher than about 0.10 Titanium (Ti) not higher than about 0.008 Niobium (Nb) not higher than about 0.03 Oxygen (0) not higher than about 0.003 Boron (B) not higher than about 0.001 Arsenic (As) not higher than about 0.01 Tin (Sn) not higher than about 0.0025 Antimony (Sb) not higher than about 0.01 Zinc (Zn) not higher than about 0.001 Calcium (Ca) not higher than about 0.0002 Magnesium (Mg) not higher than about 0.0002.
100251 The above elements can form either precipitates or compounds which are enriched in particular at the grain boundaries and result in a leap-like reduction of the {P37498 00822195 DOC} 7 P37498.S03 toughness properties of the material once a concentration limit is reached or they cause grain boundary coatings, which likewise have an unfavorable effect.
[0026] Through a chemical composition of the material according to the invention adjusted within relatively narrow limits according to a preferred embodiment of the same, the hot-forming steel alloy may contain one or more of the alloying elements in the following concentrations in % by weight, based on the total weight of the alloy:
Carbon (C) from about 0.37 to about 0.40 Silicon (Si) from about 0.16 to about 0.28, preferably from about 0.18 to about 0.25 Manganese (Mn) from about 0.45 to about 0.60, preferably from about 0.50 to about 0.58 Chromium (Cr) from about 4.80 to about 5.20, preferably from about 4.90 to about 5.10 Molybdenum (Mo) from about 1.55 to about 1.90, preferably from about 1.65 to about 1.80 Vanadium (V) from about 0.45 to about 0.70, preferably from about 0.52 to about 0.60 Nitrogen (N) from about 0.012 to about 0.015, remainder iron (Fe) and impurity elements.
[0027] By means of this alloy according to the invention, which makes particular demands on a smelting technology, it is possible to achieve high toughness values of the material even with low cooling rates in the thermal quenching and tempering process with high material hardnesses.
[0028] The invention is described in more detail below based on test results.
[0029] The test results are illustrated in Fig. 1.
[0030] Alloys with a chemical composition according to the invention and according to DIN material no. 1.2343 with standard-conforming and with reduced Si contents and 1P37498 00822195 DOC) 8 P37498.S03 according to DIN material no. 1.2367, as given in Table I, were examined after a thermal quenching and tempering treatment to a material hardness of 44 HRC with different cooling parameters X during hardening. The value that characterizes the parameter X is calculated as follows:
Cooling parameter [X] corresponds to the time [in sec.] for a cooling from 800 C to 500 C divided by 100.
[0031] The alloying elements of the materials listed in Table I are indicated below, wherein the remainder represents the content of iron and accompanying elements and impurity elements.
Alloy composition in % by weight Material No. C Si Mn P S N Cr Mo Ni V
1.2343 0.39 1.11 0.41 0.021 0.023 - 5.28 1.26 0.21 0.38 1.2343 So 0.38 0.21 0.39 0.022 0.019 - 5.34 1.30 0.16 0.40 1.2367 0.38 0.40 0.47 0.029 0.021 - 5.00 2.98 0.20 0.61 W 350 0.39 0.19 0.51 0.004 0.001 0.013 4.91 1.69 0.06 0.53 [0032] Fig. 1 shows that with a cooling parameter up to approx. X = 12 the material no.
1.2343 with Si contents reduced to approx. 0.20% by weight in a thermally quenched and tempered state to a material hardness of 44 HRC has the highest toughness measured according to Charpy V. However, with increasing cooling parameter X the toughness values subsequently drop sharply to a low level.
100331 The materials no. 1.2343 with standard-conforming Si contents and no.
1.2367 have a lower toughness with a quenched and tempered hardness of 44 HRC, but have a remarkable through-hardening capability, which is documented by only slightly reduced toughness values as a function of the cooling parameter.
(P37498 00822 195 DOC} 9 100341 Although at high cooling rates or in the range of the cooling parameter A up to 13, a test alloy W 350 according to the invention shows slightly lower toughness values at room temperature in the state quenched and tempered to 44 HRC compared to the So material no. 1.2343 (Si 0.2% by weight), the toughness of the material remains essentially unchanged at superior high values even with reduced cooling rates or higher cooling parameters.
[0035] It is noted that the foregoing examples have been provided merely for the purpose of explanation and are in no way to be construed as limiting of the present invention. While the present invention has been described with reference to an exemplary embodiment, it is understood that the words which have been used herein are words of description and illustration, rather than words of limitation.
Changes may be made, within the purview of the appended claims, as presently stated and as amended.
Although the present invention has been described herein with reference to particular means, materials and embodiments, the present invention is not intended to be limited to these particulars; rather, the present invention extends to all functionally equivalent structures, methods and uses, such as are within the scope of the appended claims.
Claims (18)
1. A hot-forming steel alloy, wherein the alloy comprises, in addition to iron and impurity elements, the following elements in % by weight, based on a total weight of the alloy:
Carbon (C) from 0.35 to 0.42;
Silicon (Si) from 0.15 to 0.29;
Manganese (Mn) from 0.40 to 0.70;
Chromium (Cr) from 4.70 to 5.45;
Molybdenum (Mo) from 1.50 to 1.95;
Vanadium (V) from 0.40 to 0.75; and Nitrogen (N) from 0.011 to 0.016;
wherein a toughness of the alloy, measured as Notch Impact Strength at room temperature in a state quenched and tempered to 44 HRC, remains substantially unchanged, at a reduced cooling rate .lambda. of 13 or higher during hardening, and wherein .lambda.
corresponds to the time [in seconds] for a cooling from 800 to 500°C
divided by 100.
Carbon (C) from 0.35 to 0.42;
Silicon (Si) from 0.15 to 0.29;
Manganese (Mn) from 0.40 to 0.70;
Chromium (Cr) from 4.70 to 5.45;
Molybdenum (Mo) from 1.50 to 1.95;
Vanadium (V) from 0.40 to 0.75; and Nitrogen (N) from 0.011 to 0.016;
wherein a toughness of the alloy, measured as Notch Impact Strength at room temperature in a state quenched and tempered to 44 HRC, remains substantially unchanged, at a reduced cooling rate .lambda. of 13 or higher during hardening, and wherein .lambda.
corresponds to the time [in seconds] for a cooling from 800 to 500°C
divided by 100.
2. The alloy of claim 1, wherein the alloy comprises, in % by weight:
Carbon (C) from 0.37 to 0.40;
Silicon (Si) from 0.16 to 0.28;
Manganese (Mn) from 0.45 to 0.60;
Chromium (Cr) from 4.80 to 5.20;
Molybdenum (Mo) from 1.55 to 1.90;
Vanadium (V) from 0.45 to 0.70; and Nitrogen (N) from 0.012 to 0.015.
Carbon (C) from 0.37 to 0.40;
Silicon (Si) from 0.16 to 0.28;
Manganese (Mn) from 0.45 to 0.60;
Chromium (Cr) from 4.80 to 5.20;
Molybdenum (Mo) from 1.55 to 1.90;
Vanadium (V) from 0.45 to 0.70; and Nitrogen (N) from 0.012 to 0.015.
3. The alloy of claim 1, wherein the alloy comprises, in % by weight:
Carbon (C) from 0.37 to 0.40;
Silicon (Si) from 0.18 to 0.25;
Manganese (Mn) from 0.50 to 0.58;
Chromium (Cr) from 4.90 to 5.10;
Molybdenum (Mo) from 1.65 to 1.80;
Vanadium (V) from 0.52 to 0.60; and Nitrogen (N) from 0.012 to 0.015.
Carbon (C) from 0.37 to 0.40;
Silicon (Si) from 0.18 to 0.25;
Manganese (Mn) from 0.50 to 0.58;
Chromium (Cr) from 4.90 to 5.10;
Molybdenum (Mo) from 1.65 to 1.80;
Vanadium (V) from 0.52 to 0.60; and Nitrogen (N) from 0.012 to 0.015.
4. The alloy of claim 1, 2 or 3, wherein maximum concentrations of one or more impurity elements in % by weight, based on a total weight of the alloy, are:
Phosphorus (P) not more than about 0.005;
Sulfur (S) not more than 0.003;
Nickel (Ni) not more than 0.10;
Tungsten (W) not more than 0.10;
Copper (Cu) not more than 0.10;
Cobalt (Co) not more than 0.10;
Titanium (Ti) not more than 0.008;
Niobium (Nb) not more than 0.03;
Oxygen (O) not more than 0.003;
Boron (B) not more than 0.001;
Arsenic (As) not more than 0.01;
Tin (Sn) not more than 0.0025;
Antimony (Sb) not more than 0.01;
Zinc (Zn) not more than 0.001;
Calcium (Ca) not more than 0.0002; or Magnesium (Mg) not more than 0.0002.
Phosphorus (P) not more than about 0.005;
Sulfur (S) not more than 0.003;
Nickel (Ni) not more than 0.10;
Tungsten (W) not more than 0.10;
Copper (Cu) not more than 0.10;
Cobalt (Co) not more than 0.10;
Titanium (Ti) not more than 0.008;
Niobium (Nb) not more than 0.03;
Oxygen (O) not more than 0.003;
Boron (B) not more than 0.001;
Arsenic (As) not more than 0.01;
Tin (Sn) not more than 0.0025;
Antimony (Sb) not more than 0.01;
Zinc (Zn) not more than 0.001;
Calcium (Ca) not more than 0.0002; or Magnesium (Mg) not more than 0.0002.
5. The alloy of claim 1, wherein the alloy comprises from 0.37 % to 0.40 %
by weight of C.
by weight of C.
6. The alloy of claim 1, wherein the alloy comprises from 0.16 % to 0.28 %
by weight of Si.
by weight of Si.
7. The alloy of claim 6, wherein the alloy comprises from 0.18 % to 0.25 %
by weight of Si.
by weight of Si.
8. The alloy of claim 1, wherein the alloy comprises from 0.45 % to 0.60 %
by weight of Mn.
by weight of Mn.
9. The alloy of claim 8, wherein the alloy comprises from 0.50 % to 0.58 %
by weight of Mn.
by weight of Mn.
10. The alloy of claim 1, wherein the alloy comprises from 4.80 % to 5.20 %
by weight of Cr.
by weight of Cr.
11. The alloy of claim 10, wherein the alloy comprises from 4.90 % to 5.10 % by weight of Cr.
12. The alloy of claim 1, wherein the alloy comprises from 1.55 % to 1.90 %
by weight of Mo.
by weight of Mo.
13. The alloy of claim 12, wherein the alloy comprises from 1.65 % to 1.80 % by weight of Mo.
14. The alloy of claim 1, wherein the alloy comprises from 0.45 % to 0.70 %
by weight of V.
by weight of V.
15. The alloy of claim 14, wherein the alloy comprises from 0.52 % to 0.60 % by weight of V.
16. The alloy of any one of claims 1 to 15, wherein the alloy comprises from 0.012 %
to 0.015 % by weight of N.
to 0.015 % by weight of N.
17. A part which comprises an alloy as defined in any one of claims 1 to 16.
18. The part of claim 17, wherein the part is a die-casting die, an extruder, or a portion thereof.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0181508A AT506790B1 (en) | 2008-11-20 | 2008-11-20 | HOT STEEL ALLOY |
| ATA1815/2008 | 2008-11-20 |
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| Publication Number | Publication Date |
|---|---|
| CA2686071A1 CA2686071A1 (en) | 2010-05-20 |
| CA2686071C true CA2686071C (en) | 2014-01-28 |
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ID=41402020
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|---|---|---|---|
| CA2686071A Active CA2686071C (en) | 2008-11-20 | 2009-11-17 | Hot-forming steel alloy |
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| Country | Link |
|---|---|
| US (2) | US20100150772A1 (en) |
| EP (1) | EP2194155B1 (en) |
| AT (2) | AT506790B1 (en) |
| AU (1) | AU2009238307C1 (en) |
| BR (1) | BRPI0904501A2 (en) |
| CA (1) | CA2686071C (en) |
| DE (1) | DE502009000171D1 (en) |
| ES (1) | ES2353192T3 (en) |
| PL (1) | PL2194155T3 (en) |
| SI (1) | SI2194155T1 (en) |
| ZA (1) | ZA200908201B (en) |
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| AT507215B1 (en) * | 2009-01-14 | 2010-03-15 | Boehler Edelstahl Gmbh & Co Kg | WEAR-RESISTANT MATERIAL |
| US10975460B2 (en) | 2015-01-28 | 2021-04-13 | Daido Steel Co., Ltd. | Steel powder and mold using the same |
| SE539646C2 (en) * | 2015-12-22 | 2017-10-24 | Uddeholms Ab | Hot work tool steel |
| CN107400833A (en) * | 2017-08-30 | 2017-11-28 | 王延敏 | A kind of steel construction jacking system manufacturing process |
| US20210262071A1 (en) * | 2018-10-05 | 2021-08-26 | Hitachi Metals, Ltd. | Hot work tool steel and hot work tool |
| CN109821951B (en) * | 2018-12-06 | 2020-07-21 | 苏州普热斯勒先进成型技术有限公司 | Preparation method and device of corrosion-resistant hot stamping part |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2893902A (en) * | 1959-02-04 | 1959-07-07 | Vanadium Alloys Steel Co | Heat treatment of steel |
| US3791819A (en) * | 1968-11-12 | 1974-02-12 | Jones & Laughlin Steel Corp | Production of stainless steels |
| AT403058B (en) * | 1995-03-23 | 1997-11-25 | Boehler Edelstahl | IRON BASED ALLOY FOR USE AT HIGHER TEMPERATURE AND TOOLS MADE OF THIS ALLOY |
| JPH08269625A (en) * | 1995-03-31 | 1996-10-15 | Sumitomo Metal Ind Ltd | Hot rolled tool steel excellent in high temperature strength and toughness |
| DE59804046D1 (en) * | 1998-02-27 | 2002-06-13 | Boehler Edelstahl Gmbh & Co Kg | Iron-based alloy for use at elevated temperatures |
| SE511758C2 (en) * | 1998-03-27 | 1999-11-22 | Uddeholm Tooling Ab | Steel material for hot work tools |
| AT410447B (en) * | 2001-10-03 | 2003-04-25 | Boehler Edelstahl | HOT STEEL SUBJECT |
| KR20130036076A (en) * | 2006-09-15 | 2013-04-09 | 히타치 긴조쿠 가부시키가이샤 | Hot-working tool steel having excellent toughness and high-temperature strength and method for production thereof |
-
2008
- 2008-11-20 AT AT0181508A patent/AT506790B1/en not_active IP Right Cessation
-
2009
- 2009-11-16 ES ES09450215T patent/ES2353192T3/en active Active
- 2009-11-16 AT AT09450215T patent/ATE487805T1/en active
- 2009-11-16 DE DE502009000171T patent/DE502009000171D1/en active Active
- 2009-11-16 PL PL09450215T patent/PL2194155T3/en unknown
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- 2009-11-16 EP EP09450215A patent/EP2194155B1/en active Active
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| AU2009238307B2 (en) | 2013-12-19 |
| PL2194155T3 (en) | 2011-04-29 |
| US20150292067A1 (en) | 2015-10-15 |
| ATE487805T1 (en) | 2010-11-15 |
| CA2686071A1 (en) | 2010-05-20 |
| BRPI0904501A2 (en) | 2011-02-08 |
| DE502009000171D1 (en) | 2010-12-23 |
| AU2009238307C1 (en) | 2014-03-13 |
| SI2194155T1 (en) | 2011-01-31 |
| ZA200908201B (en) | 2011-02-23 |
| US20100150772A1 (en) | 2010-06-17 |
| AU2009238307A1 (en) | 2010-06-03 |
| AT506790B1 (en) | 2009-12-15 |
| EP2194155B1 (en) | 2010-11-10 |
| ES2353192T3 (en) | 2011-02-28 |
| EP2194155A1 (en) | 2010-06-09 |
| AT506790A4 (en) | 2009-12-15 |
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