CN109295393A - The plastic die steel and preparation method thereof of novel high tenacity height polishing highly corrosion resistant - Google Patents

The plastic die steel and preparation method thereof of novel high tenacity height polishing highly corrosion resistant Download PDF

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CN109295393A
CN109295393A CN201811524548.0A CN201811524548A CN109295393A CN 109295393 A CN109295393 A CN 109295393A CN 201811524548 A CN201811524548 A CN 201811524548A CN 109295393 A CN109295393 A CN 109295393A
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temperature
steel
forging
steel ingot
plastic die
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CN109295393B (en
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王飞
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Tianjin Gang Yanhai Moral Science And Technology Ltd
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Tianjin Gang Yanhai Moral Science And Technology Ltd
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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
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • 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
    • C21D1/26—Methods of annealing
    • C21D1/32—Soft annealing, e.g. spheroidising
    • 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
    • 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
    • C22C38/04—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
    • C22C38/40—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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
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Abstract

The present invention provides a kind of plastic die steel and preparation method thereof of novel high tenacity height polishing highly corrosion resistant, the material for preparing the plastic die steel includes each ingredient of following weight percent: C 0.18-0.3%, Si 0.1-0.5%, Mn 0.3-0.48%, Cr 11.5-12.8%, Mo 0.15-0.4%, V 0.4-0.7%, Ni 0.3-0.59%, P < 0.025%, S < 0.001%, rare earth 0.003-0.009%, surplus is Fe, the plastic die steel can get more high rigidity, that is, 42.2-47.7HRC, ballistic work is 368-399J at this time, temper resistance significantly improves, with more superior wear-resisting property, corrosion resistance and high Polishability.

Description

The plastic die steel and preparation method thereof of novel high tenacity height polishing highly corrosion resistant
Technical field
The invention belongs to mould steel and machining field, in particular to a kind of novel high tenacity height polishes highly corrosion resistant Plastic die steel and preparation method thereof.
Background technique
With plastic products in industry and daily life using more and more extensive, plastic mould industry is to mould steel Demand is also increasing.In plastics processing, the quality of mold is self-evident to the guarantee effect of product quality.Modeling Material mold develops to the direction of precise treatment, enlargement and multi-cavity, and the requirement to the performance of plastic die steel is higher and higher, modeling The performance of mould steel should be depending on the requirement of plastics kind, product-use, production batch, dimensional accuracy and surface quality.
The failure mode of plastic die steel has following three kinds:
(1) surface abrasion
Since reinforced resin filler generates mold cavity surface and washes away, wears and corrosiveness in plastics, to influence It is increased to mold cavity surface roughness value, dimension overproof.
(2) it deforms
Mold locally generates plastic deformation, leads to that recess occurs for surface, wrinkle, point and corner angle heap collapse etc. and damages.
(3) it is broken
The phenomenon of rupture as caused by mold stress raisers.
For above-mentioned fracture failure form, need to improve a kind of plastic die steel of high tenacity height polishing highly corrosion resistant.
Summary of the invention
In view of the above-mentioned problems, the present invention provide a kind of novel high tenacity height polishing highly corrosion resistant plastic die steel and its Preparation method, the plastic die steel have high-wearing feature, high polishability and high tenacity.
Specific technical solution of the present invention is as follows:
The present invention provides a kind of plastic die steel of novel high tenacity height polishing highly corrosion resistant, prepares the plastic mould The material of steel includes each ingredient of following weight percent: C 0.18-0.3%, Si 0.1-0.5%, Mn 0.3-0.48%, Cr 11.5-12.8%, Mo 0.15-0.4%, V 0.4-0.7%, Ni 0.3-0.59%, P < 0.025%, S < 0.001%, rare earth 0.003-0.009%, surplus Fe.
Further to improve, the material for preparing the plastic die steel includes each ingredient of following weight percent: C 0.2-0.24%, Si 0.42-0.46%, Mn 0.35-0.43%, Cr 12-12.5%, Mo 0.23-0.35%, V 0.52- 0.6%, Ni 0.42-0.48%, P < 0.025%, S < 0.001%, rare earth 0.005-0.007%, surplus Fe.
Further to improve, the material for preparing the plastic die steel includes each ingredient of following weight percent: C 0.22%, Si 0.45%, Mn 0.4%, Cr 12.3%, Mo 0.29%, V 0.55%, Ni 0.44%, P < 0.02%, S < 0.001%, rare earth 0.006%, surplus Fe.
Further to improve, the rare earth is the mixture of the cerium that weight ratio is 1:2-4 and ferrosilicon.
Another aspect of the present invention provides a kind of preparation side of the plastic die steel of novel high tenacity height polishing highly corrosion resistant Method, the preparation method include the following steps:
1) melting: by scrap iron or iron block investment intermediate frequency furnace, high-temperature molten steel is poured into LF furnace by smelting acquisition high-temperature molten steel It is interior, according to the material and following weight percent C 0.18-0.3%, Si 0.1-0.5%, Mn for preparing the plastic die steel 0.3-0.48%, Cr 11.5-12.8%, Mo 0.15-0.4%, V 0.4-0.7%, Ni 0.3-0.59%, P < 0.025%, S It is multiple that ferrosilicon, manganese iron, ferrochrome, molybdenum-iron, vanadium iron, rare earth is added in < 0.001%, rare earth 0.003-0.009%, surplus Fe, ingredient Zygonema and electrolytic nickel or nickel plate carry out melting；
2) it deaerates: being de-gassed by VD furnace；
3) it is poured: being poured under protection of argon gas, form steel ingot；
4) electroslag remelting: by steel ingot electroslag remelting content of rare earth under protection of argon gas；The degree of purity of steel is improved, and improves steel Curing condition, so that dropping improves steel ingot compactness and structural homogenity and control primary carbide generates；
5) High temperature diffusion: will by electroslag remelting steel ingot carry out High temperature diffusion, eliminate process of setting in Aliquation carbide, Eliminate interdendritic segregation；
6) it forges: the steel ingot Jing Guo High temperature diffusion is forged, obtain forging blank；Improve structural homogenity；
7) it is heat-treated: the steel ingot after forging is heat-treated；Eliminate proeutectoid carbide intercrystalline precipitation；
8) nodularization degeneration processing spheroidizing: is carried out to the steel ingot after Overheating Treatment.
By process above, steel carbide spheroidization can be made, size is suitable, convenient for machining.
It is further to improve, High temperature diffusion specifically comprises the processes of: the steel ingot of electroslag remelting will be passed through at 1230-1280 DEG C Heat preservation, soaking time are 8-10 hours.
It is further to improve, forging specifically comprises the processes of: heating temperature is 1200-1250 DEG C when forging, keeps the temperature 5 hours, Starting forging temperature is 1160-1200 DEG C, 840-890 DEG C of final forging temperature, it is preferable that heating temperature is 1220-1240 DEG C when forging, is opened Forging temperature is 1180-1190 DEG C, 860-880 DEG C of final forging temperature.
It is further to improve, heat treatment specifically comprises the processes of: by the steel ingot after forging, in 1050-1080 DEG C of heat preservation 10-15 Hour, preferably in 1060-1070 DEG C heat preservation 10-15 hours, mist is cooled to 400-600 DEG C, preferably 500-540 DEG C.
It is further to improve, spheroidizing specifically comprises the processes of: by the steel ingot through Overheating Treatment in 400-500 DEG C of shove charge, It is warming up to 890-920 DEG C of heat preservation 6-7h, with 10-15 DEG C of speed slow cooling to 760-780 DEG C, keeps the temperature 15-35h, then with 5-15 DEG C Speed slow cooling is come out of the stove air-cooled to 610-650 DEG C.
It is further to improve, the preparation of the plastic die steel of novel high tenacity height polishing highly corrosion resistant provided by the invention Method includes the following steps:
1) melting: by scrap iron or iron block investment intermediate frequency furnace, high-temperature molten steel is poured into LF furnace by smelting acquisition high-temperature molten steel It is interior, according to the material and following weight percent C 0.18-0.3%, Si 0.1-0.5%, Mn for preparing the plastic die steel 0.3-0.48%, Cr 11.5-12.8%, Mo 0.15-0.4%, V 0.4-0.7%, Ni 0.3-0.59%, P < 0.025%, S It is multiple that ferrosilicon, manganese iron, ferrochrome, molybdenum-iron, vanadium iron, rare earth is added in < 0.001%, rare earth 0.003-0.009%, surplus Fe, ingredient Zygonema and electrolytic nickel or nickel plate carry out melting；
2) it deaerates: being de-gassed by VD furnace；
3) it is poured: being poured under protection of argon gas, form steel ingot；
4) electroslag remelting: by steel ingot electroslag remelting under protection of argon gas；
5) it High temperature diffusion: will be kept the temperature at 1265 DEG C by the steel ingot of electroslag remelting, soaking time is 9.5 hours；
6) it forges: will be forged by the steel ingot of electroslag remelting, heating temperature is 1235 DEG C when forging, 5 hours are kept the temperature, Starting forging temperature is 1185 DEG C, 870 DEG C of final forging temperature；
7) it is heat-treated: by the steel ingot after forging, keeping the temperature 12 hours at 1065 DEG C, mist is cooled to 520 DEG C；
8) spheroidizing: by the steel ingot through Overheating Treatment in 480 DEG C of shove charges, 900 DEG C of heat preservation 6h are warming up to, with 12 DEG C of speed Slow cooling keeps the temperature 27h to 775 DEG C, then is come out of the stove air-cooled with 10 DEG C of speed slow cooling to 625 DEG C.
The plastic die steel and preparation method thereof of novel high tenacity height polishing highly corrosion resistant provided by the present invention, tool It has the advantage that compared with 4Cr13 steel, the plastic die steel of novel high tenacity height polishing highly corrosion resistant provided by the invention can More high rigidity, that is, 42.2-47.7HRC is obtained, ballistic work is 368-399J at this time, and temper resistance significantly improves, and is had more superior Wear-resisting property, corrosion resistance and high polishability.
Detailed description of the invention
Fig. 1 is the abrasion test for the plastic die steel that the novel high tenacity height of the present invention polishes highly corrosion resistant；
Fig. 2 is the temper resistance test for the plastic die steel that the novel high tenacity height of the present invention polishes highly corrosion resistant；
Fig. 3 is the toughness test for the plastic die steel that the novel high tenacity height of the present invention polishes highly corrosion resistant；
Fig. 4 is the polishing performance test for the plastic die steel that the novel high tenacity height of the present invention polishes highly corrosion resistant；
Fig. 5 is the corrosion resistance test for the plastic die steel that the novel high tenacity height of the present invention polishes highly corrosion resistant.
Specific embodiment
Embodiment 1 is to embodiment 8
What various embodiments of the present invention provided prepares the plastic die steel material of novel high tenacity height polishing highly corrosion resistant The weight percent of ingredient and each ingredient is shown in Table 1.
Each embodiment of table 1 prepares the ingredient and weight percent (%) of plastic die steel material
Embodiment 1 2 3 4 5 6 7 8
C 0.18 0.19 0.2 0.22 0.24 0.26 0.28 0.3
Si 0.1 0.2 0.42 0.45 0.46 0.3 0.35 0.5
Mn 0.3 0.32 0.35 0.4 0.43 0.44 0.46 0.48
Cr 11.5 11.7 12 12.3 12.5 12.6 12.7 12.8
Mo 0.15 0.2 0.23 0.29 0.35 0.3 0.32 0.35
V 0.4 0.5 0.52 0.55 0.6 0.62 0.65 0.7
Ni 0.3 0.38 0.42 0.44 0.48 0.5 0.55 0.59
P 0.02 0.015 0.009 0.008 0.01 0.01 0.01 0.011
S 0.0007 0.0008 0.0002 0.0001 0.0003 0.0004 0.0009 0.0003
Rare earth 0.003 0.004 0.005 0.006 0.007 0.005 0.008 0.009
Fe Surplus Surplus Surplus Surplus Surplus Surplus Surplus Surplus
In above embodiments plastic die steel the preparation method comprises the following steps:
1) melting: by scrap iron or iron block investment intermediate frequency furnace, high-temperature molten steel is poured into LF furnace by smelting acquisition high-temperature molten steel It is interior, the material and following weight percent C 0.18-0.3%, Si 0.1- of the plastic die steel are prepared according to each embodiment 0.5%, Mn 0.3-0.48%, Cr 11.5-12.8%, Mo 0.15-0.4%, V 0.4-0.7%, Ni 0.3-0.59%, P < Ferrosilicon, manganese iron, ferrochrome, molybdenum-iron, vanadium is added in 0.025%, S < 0.001%, rare earth 0.003-0.009%, surplus Fe, ingredient Iron, rare earth recombination line and electrolytic nickel carry out melting；
2) it deaerates: being de-gassed by VD furnace；
3) it is poured: being poured under protection of argon gas, form steel ingot；
4) electroslag remelting: by steel ingot electroslag remelting under protection of argon gas；
5) it High temperature diffusion: will be kept the temperature at 1265 DEG C by the steel ingot of electroslag remelting, soaking time is 9.5 hours；
6) it forges: will be forged by the steel ingot of electroslag remelting, heating temperature is 1235 DEG C when forging, 5 hours are kept the temperature, Starting forging temperature is 1185 DEG C, 870 DEG C of final forging temperature；
7) it is heat-treated: by the steel ingot after forging, keeping the temperature 12 hours at 1065 DEG C, mist is cooled to 520 DEG C；
8) spheroidizing: by the steel ingot through Overheating Treatment in 480 DEG C of shove charges, 900 DEG C of heat preservation 6h are warming up to, with 12 DEG C of speed Slow cooling keeps the temperature 27h to 775 DEG C, then is come out of the stove air-cooled with 10 DEG C of speed slow cooling to 625 DEG C.
Embodiment 9
The plastic die steel material of what the embodiment of the present invention 9 provided prepare novel high tenacity height polishes highly corrosion resistant at Divide and the weight percent of each ingredient be as follows:
C 0.3%, Si 0.5%, Mn 0.48%, Cr 12.8%, Mo 0.15%, V 0.7%, Ni 0.5%, P 0.01%, S 0.0008%, rare earth 0.006%, surplus Fe.
The plastic die steel the preparation method comprises the following steps:
1) melting: by scrap iron or iron block investment intermediate frequency furnace, high-temperature molten steel is poured into LF furnace by smelting acquisition high-temperature molten steel It is interior, the material and following weight percent C 0.3% of the plastic die steel, Si 0.5%, Mn are prepared according to each embodiment 0.48%, Cr 12.8%, Mo 0.15%, V 0.7%, Ni 0.5%, P 0.01%, S 0.0008%, rare earth 0.006%, Surplus is Fe, and ferrosilicon, manganese iron, ferrochrome, molybdenum-iron, vanadium iron, rare earth recombination line and electrolytic nickel is added in ingredient, carries out melting；
2) it deaerates: being de-gassed by VD furnace；
3) it is poured: being poured under protection of argon gas, form steel ingot；
4) electroslag remelting: by steel ingot electroslag remelting under protection of argon gas；
5) it High temperature diffusion: will be kept the temperature at 1230 DEG C by the steel ingot of electroslag remelting, soaking time is 10 hours；
6) it forges: will be forged by the steel ingot of electroslag remelting, heating temperature is 1200 DEG C when forging, 5 hours are kept the temperature, Starting forging temperature is 1160 DEG C, 840 DEG C of final forging temperature；
7) it is heat-treated: by the steel ingot after forging, keeping the temperature 15 hours at 1050 DEG C, mist is cooled to 400 DEG C；
8) spheroidizing: by the steel ingot through Overheating Treatment in 400 DEG C of shove charges, 890 DEG C of heat preservation 6h are warming up to, with 15 DEG C of speed Slow cooling keeps the temperature 35h to 760 DEG C, then is come out of the stove air-cooled with 5 DEG C of speed slow cooling to 610 DEG C.
Embodiment 10
What the embodiment of the present invention 10 provided prepares the plastic die steel material of novel high tenacity height polishing highly corrosion resistant The weight percent of ingredient and each ingredient is as follows:
C 0.22%, Si 0.45%, Mn 0.35%, Cr 12%, Mo 0.23%, V 0.52%, Ni 0.42%, P 0.008%, S 0.0001%, rare earth 0.006%, surplus Fe.
The plastic die steel the preparation method comprises the following steps:
1) melting: by scrap iron or iron block investment intermediate frequency furnace, high-temperature molten steel is poured into LF furnace by smelting acquisition high-temperature molten steel It is interior, the material and following weight percent C 0.22% of the plastic die steel, Si 0.45%, Mn are prepared according to each embodiment 0.35%, Cr 12%, Mo 0.23%, V 0.52%, Ni 0.42%, P 0.008%, S 0.0001%, rare earth 0.006%, Surplus is Fe, and ferrosilicon, manganese iron, ferrochrome, molybdenum-iron, vanadium iron, rare earth recombination line and nickel plate is added in ingredient, carries out melting；
2) it deaerates: being de-gassed by VD furnace；
3) it is poured: being poured under protection of argon gas, form steel ingot；
4) electroslag remelting: by steel ingot electroslag remelting under protection of argon gas；
5) it High temperature diffusion: will be kept the temperature at 1280 DEG C by the steel ingot of electroslag remelting, soaking time is 8 hours；
6) it forges: will be forged by the steel ingot of electroslag remelting, heating temperature is 1250 DEG C when forging, 5 hours are kept the temperature, Starting forging temperature is 1200 DEG C, 890 DEG C of final forging temperature；
7) it is heat-treated: by the steel ingot after forging, keeping the temperature 10 hours at 1080 DEG C, mist is cooled to 600 DEG C；
8) spheroidizing: by the steel ingot through Overheating Treatment in 500 DEG C of shove charges, 920 DEG C of heat preservation 7h are warming up to, with 10 DEG C of speed Slow cooling keeps the temperature 15h to 780 DEG C, then is come out of the stove air-cooled with 15 DEG C of speed slow cooling to 650 DEG C.
Embodiment 11
What the embodiment of the present invention 11 provided prepares the plastic die steel material of novel high tenacity height polishing highly corrosion resistant The weight percent of ingredient and each ingredient is as follows:
C 0.22%, Si 0.45%, Mn 0.35%, Cr 12%, Mo 0.23%, V 0.52%, Ni0.42%, P 0.008%, S 0.0001%, rare earth 0.006%, surplus Fe.
The plastic die steel the preparation method comprises the following steps:
1) melting: by scrap iron or iron block investment intermediate frequency furnace, high-temperature molten steel is poured into LF furnace by smelting acquisition high-temperature molten steel It is interior, the material and following weight percent C 0.22% of the plastic die steel, Si 0.45%, Mn are prepared according to each embodiment 0.35%, Cr 12%, Mo 0.23%, V 0.52%, Ni 0.42%, P 0.008%, S 0.0001%, rare earth 0.006%, Surplus is Fe, and ferrosilicon, manganese iron, ferrochrome, molybdenum-iron, vanadium iron, rare earth recombination line and nickel plate is added in ingredient, carries out melting；
2) it deaerates: being de-gassed by VD furnace；
3) it is poured: being poured under protection of argon gas, form steel ingot；
4) electroslag remelting: by steel ingot electroslag remelting under protection of argon gas；
5) it High temperature diffusion: will be kept the temperature at 1250 DEG C by the steel ingot of electroslag remelting, soaking time is 9 hours；
6) it forges: will be forged by the steel ingot of electroslag remelting, heating temperature is 1235 DEG C when forging, 5 hours are kept the temperature, Starting forging temperature is 1220 DEG C, 860 DEG C of final forging temperature；
7) it is heat-treated: by the steel ingot after forging, keeping the temperature 11 hours at 1060 DEG C, mist is cooled to 500 DEG C；
8) spheroidizing: by the steel ingot through Overheating Treatment in 450 DEG C of shove charges, 895 DEG C of heat preservation 6h are warming up to, with 12 DEG C of speed Slow cooling keeps the temperature 20h to 765 DEG C, then is come out of the stove air-cooled with 10 DEG C of speed slow cooling to 620 DEG C.
Embodiment 12
What the embodiment of the present invention 12 provided prepares the plastic die steel material of novel high tenacity height polishing highly corrosion resistant The weight percent of ingredient and each ingredient is as follows:
C 0.22%, Si 0.45%, Mn 0.35%, Cr 12%, Mo 0.23%, V 0.52%, Ni0.42%, P 0.008%, S 0.0001%, rare earth 0.006%, surplus Fe.
The plastic die steel the preparation method comprises the following steps:
1) melting: by scrap iron or iron block investment intermediate frequency furnace, high-temperature molten steel is poured into LF furnace by smelting acquisition high-temperature molten steel It is interior, the material and following weight percent C 0.22% of the plastic die steel, Si 0.45%, Mn are prepared according to each embodiment 0.35%, Cr 12%, Mo 0.23%, V 0.52%, Ni 0.42%, P 0.008%, S 0.0001%, rare earth 0.006%, Surplus is Fe, and ferrosilicon, manganese iron, ferrochrome, molybdenum-iron, vanadium iron, rare earth recombination line and nickel plate is added in ingredient, carries out melting；
2) it deaerates: being de-gassed by VD furnace；
3) it is poured: being poured under protection of argon gas, form steel ingot；
4) electroslag remelting: by steel ingot electroslag remelting under protection of argon gas；
5) it High temperature diffusion: will be kept the temperature at 1270 DEG C by the steel ingot of electroslag remelting, soaking time is 9.7 hours；
6) it forges: will be forged by the steel ingot of electroslag remelting, heating temperature is 1240 DEG C when forging, 5 hours are kept the temperature, Starting forging temperature is 1190 DEG C, 880 DEG C of final forging temperature；
7) it is heat-treated: by the steel ingot after forging, keeping the temperature 13 hours at 1070 DEG C, mist is cooled to 540 DEG C；
8) spheroidizing: by the steel ingot through Overheating Treatment in 490 DEG C of shove charges, 910 DEG C of heat preservation 6.7h are warming up to, with 13 DEG C of speed It spends slow cooling and keeps the temperature 30h to 778 DEG C, then come out of the stove air-cooled with 12 DEG C of speed slow cooling to 640 DEG C.
Embodiment 13
What the embodiment of the present invention 13 provided prepares the plastic die steel material of novel high tenacity height polishing highly corrosion resistant The weight percent of ingredient and each ingredient is as follows:
C 0.22%, Si 0.45%, Mn 0.35%, Cr 12%, Mo 0.23%, V 0.52%, Ni0.42%, P 0.008%, S 0.0001%, rare earth 0.006%, surplus Fe.
The plastic die steel the preparation method comprises the following steps:
1) melting: by scrap iron or iron block investment intermediate frequency furnace, high-temperature molten steel is poured into LF furnace by smelting acquisition high-temperature molten steel It is interior, the material and following weight percent C 0.22% of the plastic die steel, Si 0.45%, Mn are prepared according to each embodiment 0.35%, Cr 12%, Mo 0.23%, V 0.52%, Ni 0.42%, P 0.008%, S 0.0001%, rare earth 0.006%, Surplus is Fe, and ferrosilicon, manganese iron, ferrochrome, molybdenum-iron, vanadium iron, rare earth recombination line and nickel plate is added in ingredient, carries out melting；
2) it deaerates: being de-gassed by VD furnace；
3) it is poured: being poured under protection of argon gas, form steel ingot；
4) electroslag remelting: by steel ingot electroslag remelting under protection of argon gas；
5) it High temperature diffusion: will be kept the temperature at 1265 DEG C by the steel ingot of electroslag remelting, soaking time is 9.5 hours；
6) it forges: will be forged by the steel ingot of electroslag remelting, heating temperature is 1235 DEG C when forging, 5 hours are kept the temperature, Starting forging temperature is 1185 DEG C, 870 DEG C of final forging temperature；
7) it is heat-treated: by the steel ingot after forging, keeping the temperature 12 hours at 1065 DEG C, mist is cooled to 520 DEG C；
8) spheroidizing: by the steel ingot through Overheating Treatment in 480 DEG C of shove charges, 900 DEG C of heat preservation 6h are warming up to, with 12 DEG C of speed Slow cooling keeps the temperature 27h to 775 DEG C, then is come out of the stove air-cooled with 10 DEG C of speed slow cooling to 625 DEG C.
Reference examples 1-10
What each reference examples of the present invention provided prepares the plastic die steel material of novel high tenacity height polishing highly corrosion resistant The weight percent of ingredient and each ingredient is shown in Table 2.
Each reference examples of table 2 prepare the ingredient and weight percent (%) of plastic die steel material
Using in the above reference examples plastic die steel the preparation method comprises the following steps:
1) melting: by scrap iron or iron block investment intermediate frequency furnace, high-temperature molten steel is poured into LF furnace by smelting acquisition high-temperature molten steel It is interior, the material and following weight percent C 0.18-0.3%, Si 0.1- of the plastic die steel are prepared according to each reference examples 0.5%, Mn 0.3-0.48%, Cr 11.5-12.8%, Mo 0.15-0.4%, V 0.4-0.7%, Ni 0.3-0.59%, P < Ferrosilicon, manganese iron, ferrochrome, molybdenum-iron, vanadium iron, rare earth is added in 0.025%, S < 0.001%, rare earth 0.006%, surplus Fe, ingredient Recombination line and nickel plate carry out melting；
2) it deaerates: being de-gassed by VD furnace；
3) it is poured: being poured under protection of argon gas, form steel ingot；
4) electroslag remelting: by steel ingot electroslag remelting under protection of argon gas；
5) it High temperature diffusion: will be kept the temperature at 1265 DEG C by the steel ingot of electroslag remelting, soaking time is 9.5 hours；
6) it forges: will be forged by the steel ingot of electroslag remelting, heating temperature is 1235 DEG C when forging, 5 hours are kept the temperature, Starting forging temperature is 1185 DEG C, 870 DEG C of final forging temperature；
7) it is heat-treated: by the steel ingot after forging, keeping the temperature 12 hours at 1065 DEG C, mist is cooled to 520 DEG C；
8) spheroidizing: by the steel ingot through Overheating Treatment in 480 DEG C of shove charges, 900 DEG C of heat preservation 6h are warming up to, with 12 DEG C of speed Slow cooling keeps the temperature 27h to 775 DEG C, then is come out of the stove air-cooled with 10 DEG C of speed slow cooling to 625 DEG C.
Reference examples 11
What reference examples 11 of the present invention provided prepares the plastic die steel material of novel high tenacity height polishing highly corrosion resistant The weight percent of ingredient and each ingredient is as follows:
C 0.22%, Si 0.45%, Mn 0.35%, Cr 12%, Mo 0.23%, V 0.52%, Ni0.42%, P 0.008%, S 0.0001%, rare earth 0.006%, surplus Fe.
The plastic die steel the preparation method comprises the following steps:
1) melting: by scrap iron or iron block investment intermediate frequency furnace, high-temperature molten steel is poured into LF furnace by smelting acquisition high-temperature molten steel It is interior, the material and following weight percent C 0.22% of the plastic die steel, Si 0.45%, Mn are prepared according to each embodiment 0.35%, Cr 12%, Mo 0.23%, V 0.52%, Ni 0.42%, P 0.008%, S 0.0001%, rare earth 0.006%, Surplus is Fe, and ferrosilicon, manganese iron, ferrochrome, molybdenum-iron, vanadium iron, rare earth recombination line and nickel plate is added in ingredient, carries out melting；
2) it deaerates: being de-gassed by VD furnace；
3) it is poured: being poured under protection of argon gas, form steel ingot；
4) electroslag remelting: by steel ingot electroslag remelting under protection of argon gas；
5) it forges: will be forged by the steel ingot of electroslag remelting, heating temperature is 1260 DEG C when forging, 6 hours are kept the temperature, Starting forging temperature is 1150 DEG C, 830 DEG C of final forging temperature；
6) it is heat-treated: by the steel ingot after forging, keeping the temperature 18 hours at 1100 DEG C, mist is cooled to 350 DEG C；
7) spheroidizing: by the steel ingot through Overheating Treatment in 190 DEG C of shove charges, 880 DEG C of heat preservation 8h are warming up to, with 20 DEG C of speed Slow cooling keeps the temperature 10h to 710 DEG C, then is come out of the stove air-cooled with 20 DEG C of speed slow cooling to 600 DEG C.
The plastic mould steel mechanical property of novel high tenacity height polishing highly corrosion resistant is investigated
The investigation of 1 wearability of test example
Wear test, the plastic mould of comparing embodiment 1-13 and reference examples 1-11 are carried out using rubber foot wheel abrasion tester The wearability of steel.Test result is shown in Fig. 1.
From figure 1 it appears that plastic die steel provided by the invention has extraordinary wearability.
The investigation of 2 temper resistance of test example
Example 1-13, the plastic die steel of reference examples 1-11 and 4Cr13 steel are placed in 620 DEG C, survey the hardness of each sample It is worth (HRC), testing result is shown in Fig. 2.
From figure 2 it can be seen that the hardness of plastic die steel provided by the invention significantly improves, hardness number (HRC) reaches 42.2-47.7。
The investigation of 3 toughness of test example
Example 1-13, the mould steel of reference examples 1-11 and 4Cr13 steel survey each mould steel under 45HRC hardness respectively Ballistic work, testing result is shown in Fig. 3.
From figure 3, it can be seen that the toughness of plastic die steel provided by the invention significantly improves, ballistic work reaches 368- 399J。
The investigation of 4 polishing performance of test example
The mould steel of Example 1-13 and reference examples 1-11 are polished with same process, then measure each steel surface roughness Ra (μm) value, is as a result shown in Fig. 4.
Figure 4, it is seen that plastic die steel provided by the invention has extraordinary polishability.
The investigation of 5 corrosive nature of test example
Measure corrosion rate (GB/T10125-1997, the artificial atmosphere of the mould steel of embodiment 1-13 and reference examples 1-11 Corrosion test salt spray test), 72 hours measurement corrosion rates are sprayed with 5%NaCl aqueous solution, as a result see Fig. 5.
From figure 5 it can be seen that plastic die steel provided by the invention has extraordinary corrosion resistance.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the scope of the present invention into Row limits, and without departing from the spirit of the design of the present invention, those of ordinary skill in the art make technical solution of the present invention Various changes and improvements out, should fall within the scope of protection determined by the claims of the present invention.

Claims (10)

1. a kind of plastic die steel of novel high tenacity height polishing highly corrosion resistant, which is characterized in that prepare the plastic mould The material of steel includes each ingredient of following weight percent: C 0.18-0.3%, Si 0.1-0.5%, Mn 0.3-0.48%, Cr 11.5-12.8%, Mo 0.15-0.4%, V 0.4-0.7%, Ni 0.3-0.59%, P < 0.025%, S < 0.001%, rare earth 0.003-0.009%, surplus Fe.
2. the plastic die steel of novel high tenacity height polishing highly corrosion resistant according to claim 1, which is characterized in that system The material of the standby plastic die steel includes each ingredient of following weight percent: C 0.2-0.24%, Si 0.42-0.46%, Mn 0.35-0.43%, Cr 12-12.5%, Mo 0.23-0.35%, V 0.52-0.6%, Ni 0.42-0.48%, P < 0.025%, S < 0.001%, rare earth 0.005-0.007%, surplus Fe.
3. the plastic die steel of novel high tenacity height polishing highly corrosion resistant according to claim 2, which is characterized in that system The material of the standby plastic die steel includes each ingredient of following weight percent: C 0.22%, Si 0.45%, Mn 0.4%, Cr 12.3%, Mo 0.29%, V 0.55%, Ni 0.44%, P < 0.02%, S < 0.001%, rare earth 0.006%, surplus are Fe。
4. the plastic die steel of novel high tenacity height polishing highly corrosion resistant according to claim 1, which is characterized in that institute State the mixture that rare earth is cerium and ferrosilicon that weight ratio is 1:2-4.
5. a kind of preparation method of the plastic die steel of novel high tenacity height polishing highly corrosion resistant described in claim 1, It is characterized in that, described method includes following steps:
1) melting: by scrap iron or iron block investment intermediate frequency furnace, smelting acquisition high-temperature molten steel pours into high-temperature molten steel in LF furnace, According to the material and following weight percent C 0.18-0.3%, Si 0.1-0.5%, Mn 0.3- for preparing the plastic die steel 0.48%, Cr 11.5-12.8%, Mo 0.15-0.4%, V 0.4-0.7%, Ni 0.3-0.59%, P < 0.025%, S < It is compound that ferrosilicon, manganese iron, ferrochrome, molybdenum-iron, vanadium iron, rare earth is added in 0.001%, rare earth 0.003-0.009%, surplus Fe, ingredient Line and electrolytic nickel or nickel plate carry out melting；
2) it deaerates: being de-gassed by VD furnace；
3) it is poured: being poured under protection of argon gas, form steel ingot；
4) electroslag remelting: by steel ingot electroslag remelting under protection of argon gas；
5) High temperature diffusion: High temperature diffusion will be carried out by the steel ingot of electroslag remelting；
6) it forges: the steel ingot Jing Guo High temperature diffusion is forged, obtain forging blank；
7) it is heat-treated: the steel ingot after forging is heat-treated；
8) nodularization degeneration processing spheroidizing: is carried out to the steel ingot after Overheating Treatment.
6. preparation method according to claim 5, which is characterized in that High temperature diffusion specifically comprises the processes of: electroslag will be passed through The steel ingot of remelting is kept the temperature at 1230-1280 DEG C, and soaking time is 8-10 hours.
7. preparation method according to claim 6, which is characterized in that forging specifically comprises the processes of: heating temperature when forging It is 1200-1250 DEG C, keeps the temperature 5 hours, starting forging temperature is 1160-1200 DEG C, 840-890 DEG C of final forging temperature, it is preferable that when forging Heating temperature is 1220-1240 DEG C, and starting forging temperature is 1180-1190 DEG C, 860-880 DEG C of final forging temperature.
8. preparation method as claimed in claim 7, which is characterized in that heat treatment specifically comprises the processes of: by the steel ingot after forging, 1050-1080 DEG C heat preservation 10-15 hours, preferably in 1060-1070 DEG C heat preservation 10-15 hours, mist is cooled to 400-600 DEG C, Preferably 500-540 DEG C.
9. preparation method as claimed in claim 8, which is characterized in that spheroidizing specifically comprises the processes of: will be through Overheating Treatment Steel ingot in 400-500 DEG C of shove charge, be warming up to 890-920 DEG C of heat preservation 6-7h, with 10-15 DEG C of speed slow cooling to 760-780 DEG C, protect Warm 15-35h, then come out of the stove air-cooled with 5-15 DEG C of speed slow cooling to 610-650 DEG C.
10. preparation method as claimed in claim 9, which is characterized in that described method includes following steps:
1) melting: by scrap iron or iron block investment intermediate frequency furnace, smelting acquisition high-temperature molten steel pours into high-temperature molten steel in LF furnace, According to the material and following weight percent C 0.18-0.3%, Si 0.1-0.5%, Mn 0.3- for preparing the plastic die steel 0.48%, Cr 11.5-12.8%, Mo 0.15-0.4%, V 0.4-0.7%, Ni 0.3-0.59%, P < 0.025%, S < It is compound that ferrosilicon, manganese iron, ferrochrome, molybdenum-iron, vanadium iron, rare earth is added in 0.001%, rare earth 0.003-0.009%, surplus Fe, ingredient Line and electrolytic nickel or nickel plate carry out melting；
2) it deaerates: being de-gassed by VD furnace；
3) it is poured: being poured under protection of argon gas, form steel ingot；
4) electroslag remelting: by steel ingot electroslag remelting under protection of argon gas；
5) it High temperature diffusion: will be kept the temperature at 1265 DEG C by the steel ingot of electroslag remelting, soaking time is 9.5 hours；
6) it forges: will be forged by the steel ingot of electroslag remelting, heating temperature is 1235 DEG C when forging, keeps the temperature 5 hours, opens forging Temperature is 1185 DEG C, 870 DEG C of final forging temperature；
7) it is heat-treated: by the steel ingot after forging, keeping the temperature 12 hours at 1065 DEG C, mist is cooled to 520 DEG C；
8) spheroidizing: by the steel ingot through Overheating Treatment in 480 DEG C of shove charges, 900 DEG C of heat preservation 6h are warming up to, with 12 DEG C of speed slow cooling To 775 DEG C, 27h is kept the temperature, then come out of the stove air-cooled to 625 DEG C with 10 DEG C of speed slow cooling.
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