CN109972028A - A kind of mould steel preparation method of high tenacity - Google Patents

A kind of mould steel preparation method of high tenacity Download PDF

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Publication number
CN109972028A
CN109972028A CN201711442843.7A CN201711442843A CN109972028A CN 109972028 A CN109972028 A CN 109972028A CN 201711442843 A CN201711442843 A CN 201711442843A CN 109972028 A CN109972028 A CN 109972028A
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ingot casting
high tenacity
raw material
annealing
mould steel
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朱小坤
吴建忠
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Tiangong Aihe Special Steel Co Ltd
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Tiangong Aihe Special Steel Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0006—Adding metallic additives
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
    • 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
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/04—Making ferrous alloys by melting
    • 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
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • 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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur

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  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

The invention belongs to the preparation fields of mould steel, the mould steel preparation method of especially a kind of high tenacity, for the problem that existing mold steel toughness is poor, now propose following scheme, it is the following steps are included: S1: then raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni of selection are utilized respectively milling apparatus and carry out grinding operation by selection raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni first.Raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni in the present invention is during molten steel incorporates, it joined the rare earth of electrode bar binding rare earth bundle component wire, so that V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni element in molten steel are uniformly distributed, and Ca processing and Al processing are carried out to ingot casting, and repeat 2-3 annealing operation and heat preservation operation, and then obtain the mould steel of high tenacity.

Description

A kind of mould steel preparation method of high tenacity
Technical field
The present invention relates to the preparation technical field of mould steel more particularly to a kind of mould steel preparation methods of high tenacity.
Background technique
Mould steel is one kind of high-speed steel, is the special steel in special steel, is widely used in manufacturing high-speed cutting lathe tool, answer The delicate machine tools such as miscellaneous milling cutter and top load mold, aerial high-temperature bearing etc..With the fast development of modern processing industry, add Work speed and precision further increases, higher and higher to the performance requirement of high-speed steel, and demand is also increasing.2014, World's high-speed steel total demand reaches 400,000 tons, wherein about 200,000 tons of China's demand, and about 160,000 tons of yield.
Existing mould steel is since toughness is poor, the phenomenon that being easy to appear fracture, poor in order to solve mold steel toughness Problem proposes a kind of mould steel preparation method of high tenacity.
Summary of the invention
Technical problems based on background technology, the invention proposes a kind of mould steel preparation methods of high tenacity.
A kind of mould steel preparation method of high tenacity proposed by the present invention, comprising the following steps:
S1: first selection raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni, then by raw material V, Mo of selection, W, Cr, Sr, Co, S, T, Si, Be and Ni are utilized respectively milling apparatus and carry out grinding operation；
Raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni described in S2:S1 after milled processed were utilized respectively Filter equipment is filtered operation；
It is added in molten steel described in S3:S2 by filtered raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni, and Molten steel is placed in vacuum electric furnace, and the inside initial temperature of vacuum electric furnace is set as 1000-1200 DEG C, and the inside of vacuum electric furnace is simultaneously The rare earth of electrode bar binding rare earth bundle component wire is added, then vacuum electric furnace is heated up with the rate of 20-40 DEG C/min, Zhi Daozhen Temperature inside empty electric furnace is increased to 1500-1600 DEG C, carries out turning over packet 2-3 times to the molten steel inside vacuum furnace body at this time, finally Molten steel uses LF+VD+ESR composite refining technique to be refined again；
Molten steel in S4:S3 after fine fodder carries out ingot casting using casting unit, and the retention time of casting unit is set as 20-30min, Obtain the ingot casting of 250-350kg；
Ingot casting successively carries out Ca processing and Al processing in S5:S4；
Ingot casting described in S6:S5 is made annealing treatment using annealing device, and the annealing temperature of annealing device is set as 850-870 DEG C, and the annealing time of annealing device is set as 3 h；
The internal temperature of annealing device described in S7:S6 is increased to 940-960 DEG C, then annealing device to internal ingot casting into Row heat preservation operation, soaking time are set as 20-40min, and last annealing device carries out water-cooled process to ingot casting using water cooling equipment, Until the inside of ingot casting is cooled to 680-720 DEG C；
Ingot casting described in S8:S7 repeats 2-3 step S6 and step S7, is then cooled to room temperature using water cooling equipment, obtains To the mould steel of high tenacity.
Preferably, in the S1, milling apparatus is grinder, and the revolving speed of milling apparatus is set as 1500-2000r/ min。
Preferably, in the S2, filter plant is filter, and filter plant be used for after milled processed raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni are filtered.
Preferably, in the S3, added raw material is according to following weight percent in molten steel: V 1.2-2.6%, Mo are 5.6-7.2%, W 1.6-2.4%, Cr 0.8-2.6%, Sr 0.6-2.6%, Co 1.4-2.4%, S 0.06-0.15%, T are 1-2.4%, Si 10-14%, Be 1.4-3.6%, Ni 0.4-1.4%.
Preferably, in the S3, added raw material is according to following weight percent in molten steel: V 1.6-2.2%, Mo are 6-6.8%, W 1.8-2.2%, Cr 1.2-2.2%, Sr 1-2.2%, Co 1.8-2%, S 0.08-0.13%, T 1.4- 2%, Si 11-13%, Be 1.8-3.2%, Ni 0.8-1%.
Preferably, in the S3, added raw material is according to following weight percent in molten steel: V 1.9%, Mo are 6.4%, W 2%, Cr 1.7%, Sr 1.6%, Co 19%, S 0.105%, T 1.7%, Si 12%, Be 2.5%, Ni are 0.9%。
Preferably, in the S3, need to be added deoxidier during LF+VD+ESR composite refining, deoxidier is silico-calcium It is de-.
Preferably, in the S4, casting unit is ingot furnace, and the internal temperature of casting unit is set as 1400-1600 ℃。
Preferably, in the S5, ingot casting carries out Ca processing using Ca treatment process, includes 0.3- in Ca treated ingot casting 0.4% Ca element, Ca treated ingot casting carry out Al processing using Al treatment process, include 1.2- in Al treated ingot casting 1.4% Al element.
Preferably, in the S6, annealing device is vacuum annealing equipment, and the optimum annealing temperature of annealing device is 860 DEG C.
Beneficial effects of the present invention:
(1), the present invention has increased Sr, Co, S, T, Si, Be and Ni element newly on the basis of original, at the same raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni joined the rare earth of electrode bar binding rare earth bundle component wire, so that steel during molten steel incorporates V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni element in water is uniformly distributed, and greatly improves the toughness of high-speed steel and strong Degree；
(2), it is handled by successively carrying out Ca processing and Al to the ingot casting Jing Guo casting unit ingot casting shaping, then ingot casting repeats 2-3 annealing operation and heat preservation operation are carried out, the mould steel of high tenacity may finally be obtained；
Raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni in the present invention joined electrode during molten steel incorporates Stick bundlees the rare earth of rare earth bundle component wire, so that V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni element in molten steel are uniformly distributed, And Ca processing and Al processing are carried out to ingot casting, and repeat 2-3 annealing operation and heat preservation operation, and then obtain high tenacity Mould steel.
Specific embodiment
Combined with specific embodiments below the present invention is made further to explain.
Embodiment one
A kind of mould steel preparation method of high tenacity is proposed in the present embodiment, comprising the following steps:
S1: first selection raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni, then by raw material V, Mo of selection, W, Cr, Sr, Co, S, T, Si, Be and Ni are utilized respectively grinder and carry out grinding operation, and the revolving speed of grinder is set as 1500r/min；
Raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni described in S2:S1 after milled processed were utilized respectively Filter is filtered operation to raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni after milled processed；
By filtered raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni according to following weight hundred described in S3:S2 Divide ratio to be added in molten steel: V 1.2%, Mo 5.6%, W 1.6%, Cr 0.8%, Sr 0.6%, Co 1.4%, S are 0.06%, T 1%, Si 10%, Be 1.4%, Ni 0.4%, and molten steel is placed in vacuum electric furnace, at the beginning of the inside of vacuum electric furnace Beginning temperature setting is 1000 DEG C, the inside of vacuum electric furnace and the rare earth that electrode bar binding rare earth bundle component wire is added, then vacuum electric Furnace is heated up with the rate of 20 DEG C/min, and the temperature inside vacuum electric furnace is increased to 1500 DEG C, at this time to vacuum furnace body Internal molten steel carries out turning over packet 2 times, and last molten steel uses LF+VD+ESR composite refining technique to be refined again, and LF+VD+ESR is multiple Need to be added deoxidier during closing refining, deoxidier is de- for silico-calcium；
Molten steel in S4:S3 after fine fodder carries out ingot casting using ingot furnace, and the internal temperature of ingot furnace is set as 1400 DEG C at this time, and The retention time of ingot furnace is set as 20min, obtains the ingot casting of 250kg；
Ingot casting described in S5:S4 carries out Ca processing using Ca treatment process, in Ca treated ingot casting comprising 0.3% Ca member Element, Ca treated ingot casting carry out Al processing using Al treatment process, include 1.2% Al element in Al treated ingot casting；
Ingot casting described in S6:S5 is made annealing treatment using vacuum annealing equipment, and the annealing temperature of annealing device is set as 850 DEG C, and the annealing time of annealing device is set as 3 h；
The internal temperature of annealing device described in S7:S6 is increased to 940 DEG C, and then annealing device protects internal ingot casting Temperature operation, soaking time are set as 20min, and last annealing device carries out water-cooled process, Zhi Daozhu to ingot casting using water cooling equipment The inside of ingot is cooled to 680 DEG C；
Ingot casting described in S8:S7 repeats 2-3 step S6 and step S7, is then cooled to room temperature using water cooling equipment, obtains To the mould steel of high tenacity.
Embodiment two
A kind of mould steel preparation method of high tenacity is proposed in the present embodiment, comprising the following steps:
S1: first selection raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni, then by raw material V, Mo of selection, W, Cr, Sr, Co, S, T, Si, Be and Ni are utilized respectively grinder and carry out grinding operation, and the revolving speed of grinder is set as 1625r/min；
Raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni described in S2:S1 after milled processed were utilized respectively Filter is filtered operation to raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni after milled processed；
By filtered raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni according to following weight hundred described in S3:S2 Divide ratio to be added in molten steel: V 1.6%, Mo 6%, W 1.8%, Cr 1.2%, Sr 1%, Co 1.8%, S 0.08%, T are 1.4%, Si 11%, Be 1.8%, Ni 0.8%, and molten steel is placed in vacuum electric furnace, the inside initial temperature of vacuum electric furnace 1050 DEG C are set as, simultaneously the rare earth that electrode bar bundlees rare earth bundle component wire is added in the inside of vacuum electric furnace, and then vacuum electric furnace is with 25 DEG C/rate of min heats up, the temperature inside vacuum electric furnace is increased to 1525 DEG C, at this time to vacuum furnace body inside Molten steel carries out turning over packet 2 times, and last molten steel uses LF+VD+ESR composite refining technique to be refined again, LF+VD+ESR composite refining During need to be added deoxidier, deoxidier is de- for silico-calcium；
Molten steel in S4:S3 after fine fodder carries out ingot casting using ingot furnace, and the internal temperature of ingot furnace is set as 1450 DEG C at this time, and The retention time of ingot furnace is set as 22min, obtains the ingot casting of 250kg；
Ingot casting described in S5:S4 carries out Ca processing using Ca treatment process, in Ca treated ingot casting comprising 0.3% Ca member Element, Ca treated ingot casting carry out Al processing using Al treatment process, include 1.2% Al element in Al treated ingot casting；
Ingot casting described in S6:S5 is made annealing treatment using vacuum annealing equipment, and the annealing temperature of annealing device is set as 855 DEG C, and the annealing time of annealing device is set as 3 h；
The internal temperature of annealing device described in S7:S6 is increased to 945 DEG C, and then annealing device protects internal ingot casting Temperature operation, soaking time are set as 25min, and last annealing device carries out water-cooled process, Zhi Daozhu to ingot casting using water cooling equipment The inside of ingot is cooled to 688 DEG C；
Ingot casting described in S8:S7 is repeated twice step S6 and step S7, is then cooled to room temperature using water cooling equipment, obtains The mould steel of high tenacity.
Embodiment three
A kind of mould steel preparation method of high tenacity is proposed in the present embodiment, comprising the following steps:
S1: first selection raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni, then by raw material V, Mo of selection, W, Cr, Sr, Co, S, T, Si, Be and Ni are utilized respectively grinder and carry out grinding operation, and the revolving speed of grinder is set as 1750r/min；
Raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni described in S2:S1 after milled processed were utilized respectively Filter is filtered operation to raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni after milled processed；
By filtered raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni according to following weight hundred described in S3:S2 Ratio is divided to be added in molten steel: V 1.9%, Mo 6.4%, W 2%, Cr 1.7%, Sr 1.6%, Co 19%, S 0.105%, T For 1.7%, Si 12%, Be 2.5%, Ni 0.9%, and molten steel is placed in vacuum electric furnace, and the inside of vacuum electric furnace is initially warm Degree is set as 1000-1200 DEG C, and simultaneously the rare earth that electrode bar bundlees rare earth bundle component wire is added in the inside of vacuum electric furnace, then vacuum electric Furnace is heated up with the rate of 30 DEG C/min, and the temperature inside vacuum electric furnace is increased to 1550 DEG C, at this time to vacuum furnace body Internal molten steel carries out turning over packet 3 times, and last molten steel uses LF+VD+ESR composite refining technique to be refined again, and LF+VD+ESR is multiple Need to be added deoxidier during closing refining, deoxidier is de- for silico-calcium；
Molten steel in S4:S3 after fine fodder carries out ingot casting using ingot furnace, and the internal temperature of ingot furnace is set as 1500 DEG C at this time, and The retention time of ingot furnace is set as 25min, obtains the ingot casting of 300kg；
Ingot casting described in S5:S4 carries out Ca processing using Ca treatment process, in Ca treated ingot casting comprising 0.4% Ca member Element, Ca treated ingot casting carry out Al processing using Al treatment process, include 1.4% Al element in Al treated ingot casting；
Ingot casting described in S6:S5 is made annealing treatment using vacuum annealing equipment, and the annealing temperature of annealing device is set as 860 DEG C, and the annealing time of annealing device is set as 3 h；
The internal temperature of annealing device described in S7:S6 is increased to 950 DEG C, and then annealing device protects internal ingot casting Temperature operation, soaking time are set as 30min, and last annealing device carries out water-cooled process, Zhi Daozhu to ingot casting using water cooling equipment The inside of ingot is cooled to 700 DEG C；
Ingot casting described in S8:S7 repeats 3 step S6 and step S7, is then cooled to room temperature using water cooling equipment, obtains The mould steel of high tenacity.
Example IV
A kind of mould steel preparation method of high tenacity is proposed in the present embodiment, comprising the following steps:
S1: first selection raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni, then by raw material V, Mo of selection, W, Cr, Sr, Co, S, T, Si, Be and Ni are utilized respectively grinder and carry out grinding operation, and the revolving speed of grinder is set as 1875r/min；
Raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni described in S2:S1 after milled processed were utilized respectively Filter is filtered operation to raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni after milled processed；
By filtered raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni according to following weight hundred described in S3:S2 Ratio is divided to be added in molten steel: V 2.2%, Mo 6.8%, W 2.2%, Cr 2.2%, Sr 2.2%, Co 2%, S 0.13%, T For 2%, Si 13%, Be 3.2%, Ni 1%, and molten steel is placed in vacuum electric furnace, and the inside initial temperature of vacuum electric furnace is set Be set to 1150 DEG C, the rare earth of electrode bar binding rare earth bundle component wire is simultaneously added in the inside of vacuum electric furnace, then vacuum electric furnace with 35 DEG C/ The rate of min heats up, and the temperature inside vacuum electric furnace is increased to 1575 DEG C, at this time to the molten steel inside vacuum furnace body It carries out turning over packet 3 times, last molten steel uses LF+VD+ESR composite refining technique to be refined again, the mistake of LF+VD+ESR composite refining Need to be added deoxidier in journey, deoxidier is de- for silico-calcium；
Molten steel in S4:S3 after fine fodder carries out ingot casting using ingot furnace, and the internal temperature of ingot furnace is set as 1450 DEG C at this time, and The retention time of ingot furnace is set as 28min, obtains the ingot casting of 250-350kg；
Ingot casting described in S5:S4 carries out Ca processing using Ca treatment process, in Ca treated ingot casting comprising 0.4% Ca member Element, Ca treated ingot casting carry out Al processing using Al treatment process, include 1.4% Al element in Al treated ingot casting；
Ingot casting described in S6:S5 is made annealing treatment using vacuum annealing equipment, and the annealing temperature of annealing device is set as 865 DEG C, and the annealing time of annealing device is set as 3 h；
The internal temperature of annealing device described in S7:S6 is increased to 955 DEG C, and then annealing device protects internal ingot casting Temperature operation, soaking time are set as 35in, and last annealing device carries out water-cooled process to ingot casting using water cooling equipment, until ingot casting Inside be cooled to 710 DEG C；
Ingot casting described in S8:S7 repeats 3 step S6 and step S7, is then cooled to room temperature using water cooling equipment, obtains The mould steel of high tenacity.
Embodiment five
A kind of mould steel preparation method of high tenacity is proposed in the present embodiment, comprising the following steps:
S1: first selection raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni, then by raw material V, Mo of selection, W, Cr, Sr, Co, S, T, Si, Be and Ni are utilized respectively grinder and carry out grinding operation, and the revolving speed of grinder is set as 2000r/min；
Raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni described in S2:S1 after milled processed were utilized respectively Filter is filtered operation to raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni after milled processed；
By filtered raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni according to following weight hundred described in S3:S2 Divide ratio to be added in molten steel: V 2.6%, Mo 7.2%, W 2.4%, Cr 2.6%, Sr 2.6%, Co 1.42.4%, S are 0.15%, T 2.4%, Si 14%, Be 3.6%, Ni 1.4%, and molten steel is placed in vacuum electric furnace, the inside of vacuum electric furnace Initial temperature is set as 1200 DEG C, and simultaneously the rare earth that electrode bar bundlees rare earth bundle component wire is added in the inside of vacuum electric furnace, then vacuum Electric furnace is heated up with the rate of 40 DEG C/min, and the temperature inside vacuum electric furnace is increased to 1600 DEG C, at this time to vacuum drying oven The molten steel in internal portion carries out turning over packet 3 times, and last molten steel uses LF+VD+ESR composite refining technique to be refined again, LF+VD+ESR Need to be added deoxidier during composite refining, deoxidier is de- for silico-calcium；
Molten steel in S4:S3 after fine fodder carries out ingot casting using ingot furnace, and the internal temperature of ingot furnace is set as 1600 DEG C at this time, and The retention time of ingot furnace is set as 30min, obtains the ingot casting of 350kg；
Ingot casting described in S5:S4 carries out Ca processing using Ca treatment process, in Ca treated ingot casting comprising 0.4% Ca member Element, Ca treated ingot casting carry out Al processing using Al treatment process, include 1.4% Al element in Al treated ingot casting；
Ingot casting described in S6:S5 is made annealing treatment using vacuum annealing equipment, and the annealing temperature of annealing device is set as 870 DEG C, and the annealing time of annealing device is set as 3 h；
The internal temperature of annealing device described in S7:S6 is increased to 960 DEG C, and then annealing device protects internal ingot casting Temperature operation, soaking time are set as 40min, and last annealing device carries out water-cooled process, Zhi Daozhu to ingot casting using water cooling equipment The inside of ingot is cooled to 720 DEG C；
Ingot casting described in S8:S7 repeats 3 step S6 and step S7, is then cooled to room temperature using water cooling equipment, obtains The mould steel of high tenacity.
Compare mould steel preparation method and embodiment one to five high tenacity mould steel preparation method, embodiment one to The raising percentage of the mould steel preparation method of five high tenacity is as follows:
By above table it is found that the toughness and intensity of the mould steel preparation method of high tenacity proposed by the present invention have obtained obviously Improvement, and implement three be most preferred embodiment.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto, Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.

Claims (10)

1. a kind of mould steel preparation method of high tenacity, which comprises the following steps:
S1: first selection raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni, then by raw material V, Mo of selection, W, Cr, Sr, Co, S, T, Si, Be and Ni are utilized respectively milling apparatus and carry out grinding operation；
Raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni described in S2:S1 after milled processed were utilized respectively Filter equipment is filtered operation；
It is added in molten steel described in S3:S2 by filtered raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni, and Molten steel is placed in vacuum electric furnace, and the inside initial temperature of vacuum electric furnace is set as 1000-1200 DEG C, and the inside of vacuum electric furnace is simultaneously The rare earth of electrode bar binding rare earth bundle component wire is added, then vacuum electric furnace is heated up with the rate of 20-40 DEG C/min, Zhi Daozhen Temperature inside empty electric furnace is increased to 1500-1600 DEG C, carries out turning over packet 2-3 times to the molten steel inside vacuum furnace body at this time, finally Molten steel uses LF+VD+ESR composite refining technique to be refined again；
Molten steel in S4:S3 after fine fodder carries out ingot casting using casting unit, and the retention time of casting unit is set as 20-30min, Obtain the ingot casting of 250-350kg；
Ingot casting successively carries out Ca processing and Al processing in S5:S4；
Ingot casting described in S6:S5 is made annealing treatment using annealing device, and the annealing temperature of annealing device is set as 850-870 DEG C, and the annealing time of annealing device is set as 3 h；
The internal temperature of annealing device described in S7:S6 is increased to 940-960 DEG C, then annealing device to internal ingot casting into Row heat preservation operation, soaking time are set as 20-40min, and last annealing device carries out water-cooled process to ingot casting using water cooling equipment, Until the inside of ingot casting is cooled to 680-720 DEG C；
Ingot casting described in S8:S7 repeats 2-3 step S6 and step S7, is then cooled to room temperature using water cooling equipment, obtains To the mould steel of high tenacity.
2. a kind of mould steel preparation method of high tenacity according to claim 1, which is characterized in that in the S1, grinding Equipment is grinder, and the revolving speed of milling apparatus is set as 1500-2000r/min.
3. a kind of mould steel preparation method of high tenacity according to claim 1, which is characterized in that in the S2, filtering Equipment is filter, and filter plant be used for raw material V, Mo, W, Cr, Sr, Co, S, T, Si, Be and Ni after milled processed into Row filtering.
4. a kind of mould steel preparation method of high tenacity according to claim 1, which is characterized in that in the S3, molten steel In added raw material according to following weight percent: V 1.2-2.6%, Mo 5.6-7.2%, W 1.6-2.4%, Cr are 0.8-2.6%, Sr 0.6-2.6%, Co 1.4-2.4%, S 0.06-0.15%, T 1-2.4%, Si 10-14%, Be are 1.4-3.6%, Ni 0.4-1.4%.
5. a kind of mould steel preparation method of high tenacity according to claim 1, which is characterized in that in the S3, molten steel In added raw material according to following weight percent: V 1.6-2.2%, Mo 6-6.8%, W 1.8-2.2%, Cr 1.2- 2.2%, Sr 1-2.2%, Co 1.8-2%, S 0.08-0.13%, T 1.4-2%, Si 11-13%, Be 1.8-3.2%, Ni For 0.8-1%.
6. a kind of mould steel preparation method of high tenacity according to claim 1, which is characterized in that in the S3, molten steel In added raw material according to following weight percent: V 1.9%, Mo 6.4%, W 2%, Cr 1.7%, Sr 1.6%, Co For 19%, S 0.105%, T 1.7%, Si 12%, Be 2.5%, Ni 0.9%.
7. a kind of mould steel preparation method of high tenacity according to claim 1, which is characterized in that in the S3, LF+VD Need to be added deoxidier during+ESR composite refining, deoxidier is de- for silico-calcium.
8. a kind of mould steel preparation method of high tenacity according to claim 1, which is characterized in that in the S4, ingot casting Equipment is ingot furnace, and the internal temperature of casting unit is set as 1400-1600 DEG C.
9. a kind of mould steel preparation method of high tenacity according to claim 1, which is characterized in that in the S5, ingot casting Ca processing is carried out using Ca treatment process, includes the Ca element of 0.3-0.4% in Ca treated ingot casting, Ca treated ingot casting Al processing is carried out using Al treatment process, includes the Al element of 1.2-1.4% in Al treated ingot casting.
10. a kind of mould steel preparation method of high tenacity according to claim 1, which is characterized in that in the S6, annealing Equipment is vacuum annealing equipment, and the optimum annealing temperature of annealing device is 860 DEG C.
CN201711442843.7A 2017-12-27 2017-12-27 A kind of mould steel preparation method of high tenacity Pending CN109972028A (en)

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