WO2005061747A1 - 耐溶損性に優れた熱間工具鋼及び金型部材 - Google Patents

耐溶損性に優れた熱間工具鋼及び金型部材 Download PDF

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Publication number
WO2005061747A1
WO2005061747A1 PCT/JP2003/016304 JP0316304W WO2005061747A1 WO 2005061747 A1 WO2005061747 A1 WO 2005061747A1 JP 0316304 W JP0316304 W JP 0316304W WO 2005061747 A1 WO2005061747 A1 WO 2005061747A1
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Prior art keywords
resistance
less
tool steel
work tool
toughness
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PCT/JP2003/016304
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English (en)
French (fr)
Japanese (ja)
Inventor
Seiji Kurata
Toshimitsu Fujii
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Daido Steel Co.,Ltd
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Publication date
Application filed by Daido Steel Co.,Ltd filed Critical Daido Steel Co.,Ltd
Priority to AU2003292572A priority Critical patent/AU2003292572A1/en
Priority to US10/583,783 priority patent/US20070110610A1/en
Priority to CNA2003801108403A priority patent/CN1878881A/zh
Priority to EP03782816A priority patent/EP1696045A1/en
Priority to PCT/JP2003/016304 priority patent/WO2005061747A1/ja
Publication of WO2005061747A1 publication Critical patent/WO2005061747A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • B22D17/2209—Selection of die materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • B22C9/061—Materials which make up the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
    • B22D21/002—Castings of light metals
    • B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
    • 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
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/021—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular fabrication or treatment of ingot or slab
    • 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
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
    • C21D8/0426—Hot rolling
    • 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
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • 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
    • C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
    • 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
    • C22C38/30—Ferrous alloys, e.g. steel alloys containing chromium with cobalt
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
    • 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
    • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
    • 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
    • C23C8/24—Nitriding
    • C23C8/26—Nitriding 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
    • C23C8/06—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
    • C23C8/28—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 more than one element being applied in one step
    • C23C8/30—Carbo-nitriding
    • C23C8/32—Carbo-nitriding 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
    • C23C8/06—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
    • C23C8/36—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 using ionised gases, e.g. ionitriding
    • C23C8/38—Treatment 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
    • C23C8/40—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 liquids, e.g. salt baths, liquid suspensions
    • C23C8/42—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 liquids, e.g. salt baths, liquid suspensions only one element being applied
    • C23C8/48—Nitriding
    • C23C8/50—Nitriding 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
    • C23C8/40—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 liquids, e.g. salt baths, liquid suspensions
    • C23C8/52—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 liquids, e.g. salt baths, liquid suspensions more than one element being applied in one step
    • C23C8/54—Carbo-nitriding
    • C23C8/56—Carbo-nitriding of ferrous surfaces

Definitions

  • the present invention relates to a hot work tool steel and a mold member excellent in erosion resistance and suitable for a mold member for A1 die casting.
  • mold members As a material for the die body, core, insert pin, and hot water supply pipe for A1 die casting (hereinafter collectively referred to as mold members), hot materials such as JIS SKD61, SD6, and SKD62 have been used. Tool steel has been used.
  • Fe and A1 have a strong affinity, and the mold member reacts relatively easily with the A1 molten metal, forming a Fe-A1 intermetallic compound and dropping off the surface layer. No loss occurs.
  • This erosion includes seizures due to galling and seizure.
  • Erosion is particularly likely to occur at the mold step near the gate, which is in contact with the high-temperature A1 molten metal at high speed, and at the nested pins.
  • the present invention has been made in view of such circumstances, and it is an object of the present invention to provide a hot work tool steel and a mold member having excellent A1 erosion resistance while maintaining excellent toughness and heat check resistance. Aim.
  • Claim 1 relates to a hot work tool steel.
  • C 0.10 0.35% Si: 0.80%, ⁇ : ⁇ 3.0% Cr: 2. (! ⁇ 7.0%, l / 2W + Mo: 0.3 5.0%, N: more than 0.05 to 0.50%, C + N: 0.20 0.60% (C / N: ⁇ 6), 0: ⁇ 0.0100%, P: ⁇ 0.050%, A1: ⁇ 0.050% Is satisfied, and the balance is substantially composed of Fe.
  • Claim 2 is characterized in that, in claim 1, V: less than 0.5% by weight is further contained.
  • Claim 3 is characterized in that in any one of claims 1 and 2, one or two of Ni: ⁇ 2.0% and Co: ⁇ 5.0% are further contained.
  • Claim 5 is the invention according to claim 14, wherein S: ⁇ 0.050%
  • Mg ⁇ 0.0100%
  • Y ⁇ 0.10% 100% or more.
  • Claim 6 relates to a mold member, and is characterized in that it is made of hot-rolled steel according to any one of claims 15 to 15.
  • Claim 7 also relates to the die member, and is made of the hot work tool steel according to any one of claims 15 and the surface layer is modified by a surface treatment into a layer with higher A1 erosion resistance than the base metal. It is characterized by quality treatment.
  • the present inventor has conducted various studies on the A1 erosion resistance of hot work tool steel, and has found that increasing the amount of N improves the A1 erosion resistance.
  • N content is simply increased, if the V content is large, coarse primary carbonitrides are formed, and the toughness and heat check resistance required for mold members are reduced.
  • it is effective to reduce the amount of V and to control the C + N amount and the (C / N) ratio within a certain range. I also found out.
  • the present invention has been made based on such knowledge, and it is intended to increase the amount of N, reduce the amount of V, and control the C + N amount and the (C / N) ratio within a predetermined range. Based on this, the present invention has made it possible to increase the A1 erosion resistance without deteriorating the toughness and heat check resistance of the hot work tool steel.
  • V has been included as an essential component in hot work tool steels.
  • V For example, in the case of JIS SKD61, 0.8-1.20% of V is contained, in the case of JIS SKD62, 0.20-0.60% of V is contained, and in the case of JIS SKD8, 1.70 2.20% of V is contained. I have.
  • V in these hot work tool steels is to increase the hardness and wear resistance by carbides of V, and the fine secondary carbides of V are formed by the pinning effect of crystal grains. It refines crystal grains and contributes to ensuring toughness.
  • the coarse primary carbides of V generated during solidification also have the adverse effect of impairing the toughness and heat check resistance of hot steel.
  • the hot-rolled steel of the invention it is possible to eliminate the content of V, which has been indispensable in the past, and in this case, sufficient toughness and heat check resistance can be ensured.
  • N contained in a high content forms fine nitrides with, for example, Cr and the fine nitrides form V nitrides. It replaces fine secondary carbides and refines the crystal grains, ensuring toughness and It is presumed that the lockability is improved.
  • ⁇ V has the function of increasing hardness ⁇ abrasion resistance.Therefore, in the present invention, if hardness ⁇ wear resistance rather than hardness ⁇ abrasion resistance is required more, If you want to increase the hardness and abrasion resistance while eliminating V, you can also include V in a small amount below a certain level, and it is possible to select one of them according to fc.
  • the repair cycle of the die member can be extended irrespective of the presence or absence of surface layer modification by surface treatment.
  • the dimension in degree of the product can be maintained with high accuracy for a long time.
  • the surface treatment can be omitted, it is possible to eliminate the need for reworking the surface treatment every time the mold is repaired, and it is possible to reduce the frequency of the repair, and to reduce the frequency of the repair. Reduced repair costs can also be achieved
  • the surface layer of the gold member can be modified into a layer having higher A1 erosion resistance than the base material by surface treatment.
  • Plasma C V D TiN, TiAIN, TiC, TiCN, DLC compound single layer or multilayer formation, etc.
  • Ion plating single or multiple layers of TiN, TiAIN, CrN, TiC, TiCN, DLC compounds, etc.
  • Sputter-ring (TiN, TiAIN, CrN, Al 2 0 3 formed of multi-layered monolayers also rather are compounds, etc.)
  • C is an element necessary to secure hardness and wear resistance. To ensure sufficient hardness and wear resistance as a hot-work steel, it is necessary to add 0.10% or more.
  • Si is an element required as a deoxidizing element. It is also an effective element for improving machinability and temper softening resistance.
  • the amount of addition when the amount of addition is large, the toughness ⁇ ⁇ heat check resistance decreases. Therefore, it must be less than 0.80%. Desirably, it is more than 0.10 to 0.50%.
  • Mn is a component necessary as a deoxidizing element and for ensuring hardenability and hardness, and is desirably added in an amount of 0.02% or more. More preferably, it is 0.1% or more, and still more preferably 0.3% or more.
  • the content should be 3.0% or less. Preferably it is 2.0% or less, more preferably 1.0% or less.
  • Cr is an element necessary for strengthening the matrix by forming carbides, improving wear resistance, and ensuring hardenability, and is added in an amount of 2.0% or more. It is preferably at least 3.0%, more preferably at least 4.0%.
  • A1 is an element necessary to increase the erosion resistance and hardness.
  • the formation of fine nitrides and carbonitrides may have an effect on the improvement of A1 erosion resistance.
  • the upper limit is set to 0.50%.
  • the lower limit is set to 0.20%. Desirably, it should be 0.30 to 0.45%.
  • 0 is an element that is preferably reduced in order to reduce toughness and heat check resistance, but is an element that is unavoidably contained, and is regulated to 0.0100% or less in the present invention.
  • the content is 0.0030% or less.
  • P is an element that is preferably reduced in order to reduce toughness and heat check resistance, but is an element that is inevitably contained, and is set to 0.050% or less in the present invention. It is desirable to reduce it to 0.015% or less.
  • A1 is an element effective as a strong deoxidizing material, and is also effective for preventing crystal grain coarsening and improving nitriding properties, and is desirably added at 0.001% or more.
  • the cleanliness of the material is reduced and the machinability is reduced, so the content is limited to 0.050% or less.
  • V 0.01 to less than 0.5%
  • V forms carbides and is effective in strengthening the matrix and improving wear resistance.
  • the formation of fine carbides is also effective in refining crystal grains and thus improving toughness. Therefore, add 0.01% or more as necessary can do.
  • the content is set to less than 0.5% in order to reduce the performance. Preferably it is 0.4% or less, and more preferably 0.3% or less.
  • Ni is effective in improving hardenability and strengthening the base, and can be added as necessary.
  • the desirable amount is 0.01% or more, more preferably 0.03% or more, and further preferably 0.05% or more.
  • the upper limit must be set to 2.0%. Preferably it is 1.5% or less, more preferably 1.0% or less.
  • Co is effective for strengthening the matrix and improving the wear resistance, and can be added as needed.
  • the preferable amount is 0.01% or more, more preferably 0.03% or more, and further preferably 0.05% or more.
  • the upper limit must be set to 5.0%.
  • it is 4.0% or less, more preferably 3.0% or less.
  • T i has the effect of forming carbonitrides to prevent crystal grain coarsening during quenching, and can be added as necessary.
  • the desirable amount at that time is 0.01% or more, more preferably 0.03% or more, and further preferably 0.05% or more.
  • the upper limit must be set to 1.0% in order to reduce toughness and heat check resistance.
  • it is 0.7% or less, more preferably 0.5% or less.
  • Ta ⁇ 1.0% Ta has the effect of forming carbonitrides to prevent crystal grain coarsening during quenching, and can be added as necessary.
  • the preferable amount is 0.01% or more, more preferably 0.03% or more, and further preferably 0.05% or more.
  • the upper limit must be set to 1.0% in order to reduce toughness and heat check resistance.
  • it is 0.7% or less, more preferably 0.5% or less.
  • the desirable amount at that time is 0.0001% or more, more preferably 0.0003% or more, and still more preferably 0.0005% or more.
  • the upper limit must be made 0.010%. Preferably it is 0.007% or less, more preferably 0.005% or less.
  • Cu is effective in strengthening the matrix and can be added as needed.
  • the desirable amount is 0.01% or more, more preferably 0.03% or more, and still more preferably 0.05% or more.
  • the upper limit must be set to 1.0%. Preferably it is 0.7% or less, more preferably 0.5% or less.
  • S is an element that is inevitably contained, but is effective in improving machinability and can be added as necessary. However, if added excessively, the toughness decreases, so the upper limit is made 0.050%.
  • Ca is an element effective for improving machinability, and can be added as necessary. However, if added excessively, the toughness will decrease.
  • Se ⁇ 0.0100% Se is an element effective for improving machinability and can be added as necessary. However, if added excessively, the toughness will decrease.
  • Te is an element effective in improving machinability and can be added as needed. However, if added excessively, the toughness and hot workability deteriorate, so the upper limit is made 0.0100%.
  • Zr is an element effective in improving machinability and can be added as needed. However, if added excessively, the toughness will decrease.
  • Mg acts as a deoxidizing and desulfurizing element during melting. It is also effective in improving strength and ductility at high temperatures.
  • Y forms an oxide film on the mold surface, has the effect of improving wear resistance, seizure resistance and heat check resistance, and can be added as necessary. However, if added excessively, the toughness will decrease.
  • A1 erosion test piece is 10 mm x 60 mmL
  • hardness test piece is 1 Omm square x 1 Omm
  • Charbie test piece is JIS No.3 test piece
  • heat check test piece is ⁇ 15nunX5 mm
  • high temperature overpass wear The test piece was 1 Omm x 17 mm x 30 mm.
  • the A1 erosion test, hardness test, Charpy test, and heat check test were performed on each specimen under the following test conditions.
  • Evaluation was performed using a high-frequency heating and water-cooled heat check tester. Specifically, after repeating the heating of the surface layer at 700 ° C »water cooling 1000 times, the depth and number of cracks generated on the sample surface are measured, and the heat check resistance is evaluated based on the average crack length. did.
  • the wear resistance of conventional steel No. 27 was set to 100, and the wear resistance of other steel types was indicated by an index.
  • Example and conventional steel For a steel having the composition shown in Table 4 (Example and conventional steel), a 50 kg ingot was melted in the same pressure melting furnace (Example) and vacuum induction furnace (Conventional steel) as in Example 1, and It was forged into ⁇ 20mni round material and then annealed at 870 ° C.
  • a die-casting die (cylinder head type) was assembled with the above-mentioned punching pin, and a forging test was performed. At that time, 5000 shots were used for unpinned pins without surface treatment, and up to 20000 shots for unpinned pins after surface treatment.
  • the punched pin after fabrication was immersed in a saturated NaOH aqueous solution to remove the attached A 1 alloy, and then weighed.
  • the weight loss due to erosion was determined from (weight before test) and (weight after test), and the erosion resistance was evaluated.

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  • Physics & Mathematics (AREA)
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  • Crystallography & Structural Chemistry (AREA)
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  • Heat Treatment Of Steel (AREA)
PCT/JP2003/016304 2003-12-19 2003-12-19 耐溶損性に優れた熱間工具鋼及び金型部材 WO2005061747A1 (ja)

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AU2003292572A AU2003292572A1 (en) 2003-12-19 2003-12-19 Hot work tool steel and mold member excellent in resistance to melting
US10/583,783 US20070110610A1 (en) 2003-12-19 2003-12-19 Hot work tool steel and mold member excellent resistance to melting loss
CNA2003801108403A CN1878881A (zh) 2003-12-19 2003-12-19 耐熔化损失性优良的高温工具钢及模具构件
EP03782816A EP1696045A1 (en) 2003-12-19 2003-12-19 Hot work tool steel and mold member excellent in resistance to melting
PCT/JP2003/016304 WO2005061747A1 (ja) 2003-12-19 2003-12-19 耐溶損性に優れた熱間工具鋼及び金型部材

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AU2007232532B2 (en) * 2006-04-06 2011-06-02 Uddeholms Ab Hot-working steel

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JP2011001572A (ja) * 2009-06-16 2011-01-06 Daido Steel Co Ltd 熱間工具鋼及びこれを用いた鋼製品
CN101709407B (zh) * 2009-11-06 2011-09-28 江阴新华宏铜业有限公司 铁锰镍白铜管的制备方法
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SE1651268A1 (en) * 2016-09-26 2018-03-27 Uddeholms Ab Hot work tool steel
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JP2022180208A (ja) * 2021-05-24 2022-12-06 大同特殊鋼株式会社 鋼材及びこれを用いた鋼製品
CN114250422B (zh) * 2021-12-31 2022-09-30 安徽哈特三维科技有限公司 一种韧性好热导率高的模具钢及其制备方法
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AU2007232532B2 (en) * 2006-04-06 2011-06-02 Uddeholms Ab Hot-working steel
US7662980B2 (en) 2006-10-20 2010-02-16 Scinopharm Singapore Pte Ltd. Crystalline forms of docetaxel and process for preparation thereof
US8357811B2 (en) 2006-10-20 2013-01-22 ScnioPharm Singapore PTE Ltd. Crystalline forms of docetaxel and process for preparation thereof

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