CN106917045A - Cast the manufacture method of cold upsetting die of car - Google Patents
Cast the manufacture method of cold upsetting die of car Download PDFInfo
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- CN106917045A CN106917045A CN201710131951.6A CN201710131951A CN106917045A CN 106917045 A CN106917045 A CN 106917045A CN 201710131951 A CN201710131951 A CN 201710131951A CN 106917045 A CN106917045 A CN 106917045A
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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
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/5264—Manufacture of alloyed steels including ferro-alloys
-
- 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
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- C—CHEMISTRY; METALLURGY
- 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
- C22C33/06—Making ferrous alloys by melting using master alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—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
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with 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
- C22C38/40—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
- 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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F17/00—Multi-step processes for surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by subclass C21D or C22F or class C25
Abstract
One kind casting cold upsetting die of car, chemical composition is C 0.6 1.0%, Si 0.8 1.2%, Mn 0.7 1.0%, P≤0.03%, S≤0.03%, Cr 4.5 5.5%, Mo 1.0 1.5%, V 0.7 1.2%, Ni 1.0 1.3%, Cu 0.5 1.0%；Use medium-frequency induction furnace melting, deoxidation to skim after finishing, during molten steel poured into precoated sand cold upsetting die of car casting mold, obtain the part blank of casting cold upsetting die of car；Blank is carried out to carry out Surface hardening treatment after Strengthening and Toughening treatment again, it is machined after casting cold upsetting die of car carry out surface gas Nitrizing Treatment.Compared with cold upsetting die of car is forged, die life is improved the method for the present invention, and manufacturing process simplifies, workload is reduced, and cost reduction, stock utilization is improved, and die steel is reduced, raw material loss when saving substantial amounts of machining and Forge Heating.
Description
Technical field
The invention belongs to the method field of manufacturing of cold-working mould, particularly casting cold upsetting die of car.
Background technology
Cold-heading is efficiently to produce one of method of fastener, therefore, cold heading die is very big in the consumption of Investment in fastener industry.Cold-heading
Mould will bear very big unit pressure in cold-heading deformation process, especially deformation extent is big and during the strength of materials higher, held
The unit pressure received is bigger, while the flowing of metal is again very fierce.Therefore fastener high production rate, automation, large quantities of is met
Amount production the characteristics of, cold heading die it is necessary to have corresponding service life, to play the highest efficiency of cold heading technique.But, for a long time
Since, cold heading die is manufactured using forging mold steel (such as Cr12, Cr12MoV), because forging module steel ingot structure is loose,
Strength and toughness is low, it is necessary to by rubbing forging repeatedly, can just make modular organisation fine and close.But forging die blank alloying element in forging process
Scaling loss be about 5%, and easily cause the waste products such as the cracking of mould, burning.Additionally, the mould of forging easily forms banding
Tissue, it is poor along machine direction performance, it is very easy to ftracture during military service, and the Performance comparision in vertical fibers direction
It is good.The defect of this Mechanical Property Anisotropy of module steel ingot is forged, normal heat treatment method is difficult to eliminate.There is document report
Road, by high-tech approaches such as vacuum heats, can improve the disadvantage of forging this Mechanical Property Anisotropy of module steel ingot,
And then the service life for forging cold upsetting die of car is improved, but the method investment is big, complex process, high cost, therefore be difficult to promote.
As described above, current cold upsetting die of car generally existing service life in Investment in fastener industry is short, manufacturing process is complicated, system
It is long to make the cycle, the problems such as being more expensive to manufacture.
The content of the invention
The technical problem to be solved in the present invention be to provide a kind of casting and forging technique manufacture cold upsetting die of car, using cast it is cold
The method that upsetting mould steel substitutes forging mold steel making cold upsetting die of car, to greatly improve die life, reduces manufacturing effort, drop
Low manufacture die cost.
The present invention solves above-mentioned technical problem with following technical scheme：
1st, the chemical composition of cold-heading die steel is cast
Cast cold-heading die steel chemical composition be：C 0.6-1.0%, Si 0.8-1.2%, Mn 0.7-1.0%, P≤
0.03%, S≤0.03%, Cr 4.5-5.5%, Mo 1.0-1.5%, V 0.7-1.2%, Ni 1.0-1.3%, Cu 0.5-
1.0%；
2nd, the preparation technology of cold upsetting die of car is cast
Using the medium-frequency induction furnace smelting metal of acid lining, mild steel is first added, treat that molten steel is melted to 75-85%
When, the ferrochrome of formula ratio is first added, molybdenum-iron, vanadium iron, metal nickel sheet, ferrosilicon, the ferromanganese of formula ratio are added, it is eventually adding by rice
The coverture covering that plant ash are constituted with dry charcoal, is warming up to 1650 DEG C ± 5 DEG C, after after furnace charge all fusing, is cooled to 1480-
1500 DEG C, the cathode copper of formula ratio is added, stand 5 minutes, deoxidation slagging-off.Smelting metal gross weight 0.15- will be accounted for before going out molten steel
0.25% metallic cerium is placed in casting ladle bottom, is sufficiently stirred for after molten steel injection casting ladle, and the deoxidation again in casting ladle, and deoxidation is finished
After skim clean, during molten steel poured into precoated sand cold upsetting die of car casting mold, obtain the part blank of casting cold upsetting die of car.
3rd, the Strengthening and Toughening treatment of casting cold upsetting die of car
1. conditioning treatment
Cold upsetting die of car blank is heated to 910-930 DEG C, 1.5-2 hours is incubated, come out of the stove when cooling to 520-530 DEG C with the furnace
Air cooling.
2. high temperature quenching+high tempering
Cold upsetting die of car blank is heated to 1080-1120 DEG C, 2-2.5 hours is incubated, immediately water-cooled.
Cold upsetting die of car blank after will be quenched is reheated to 780 ± 5 DEG C, is incubated 3.5 hours, air cooling of then coming out of the stove.
4th, the Surface hardening treatment of cold upsetting die of car is cast
Casting cold upsetting die of car after machined carries out surface gas Nitrizing Treatment.
The invention compared with prior art, has the advantage that as follows with good effect：
(1) compared with cold upsetting die of car is forged, die life raising 50%~85%, manufacturing effort reduction 50%~
80%, manufacture die cost reduction by 50%~70%；
(2) compared with cold upsetting die of car is forged, die steel reduces 60%, and stock utilization is brought up to by 50%~65%
90%~95%, give up in addition cast steel and useless mold can direct remelting and casting Cheng Xin cold heading die, this is most effective and most economical
Twice laid；
(3) machining allowance is reduced, and has 35%~60% metal material to be changed into cutting in forging cold upsetting die of car manufacturing process
Bits, and can reduce 3~10 times using the consumption of casting cold upsetting die of car this respect；
(4) material, the loss of raw material when can save substantial amounts of machining and Forge Heating are saved.
Brief description of the drawings
Fig. 1 is attached casting sample metallographic structure figure (not corroding 100 ×) of casting cold upsetting die of car.
Fig. 2 is attached casting sample metallographic structure figure (not corroding 500 ×) of casting cold upsetting die of car.
Fig. 3 is the attached casting sample metallographic structure figure of casting cold upsetting die of car (4% nital corrodes 500 ×)
Fig. 4 is the attached casting sample stretching fracture shape appearance figure of casting cold upsetting die of car.
Specific embodiment
Cold upsetting die of car is prepared using the method for the present invention, can improve the service life of cold upsetting die of car, and manufacture work
Sequence simplifies, and the manufacturing cycle shortens, and die manufacturing cost is substantially reduced.
When cold upsetting die of car is prepared according to the method for the present invention, it is necessary to determine various technique ginsengs according to situation as described below
Number：
1st, rational casting cold upsetting die of car chemical composition is selected
According to the working condition requirement of cold heading die, casting cold upsetting die of car must have intensity and wearability high, while have again
Good toughness.In order to ensure that casting cold upsetting die of car has this special performance, it is necessary to rational selection casting cold upsetting die of car
Chemical composition.Because casting and forging molding make a big difference, if using forging cold-heading die steel chemistry into
Divide and prepare casting cold upsetting die of car, the result is that intensity, hardness fully achieve requirement, and impact flexibility is very low.
In the component of casting cold-heading die steel, C can synthesize various special carbide with the element such as Cr, Mo, V,
These carbide have a great impact to casting hardness and heat endurance after tempering resistance, the tempering of cold-heading die steel.With
The increase of phosphorus content, the hardness of casting die steel increases, and impact toughness decreased.Phosphorus content is reduced, under can making as-quenched
The undissolved carbide of steel is reduced, and is conducive to improving the toughness of steel.Therefore, there is good toughness in order to ensure casting cold heading die,
The C content for casting cold-heading die steel should be relatively low.In cold-heading die steel is cast, chromium can significantly improve intensity, hardness and wearability,
But plasticity and toughness are reduced simultaneously.Additionally, Cr can improve quenching degree and oxidation resistance, promote alloying.Casting cold upsetting die of car
Molybdenum is added in steel, mechanical performance can be improved, can also suppress to cast the fragility that cold-heading die steel is caused due to quenching.Vanadium is steel
Excellent deoxidier, added in casting cold-heading die steel vanadium can thinning microstructure crystal grain, improve intensity and toughness, what vanadium and carbon were formed
Carbide, can improve wearability.Nickel is added to be conducive to improving the impact flexibility of casting cold upsetting die of car in casting cold-heading die steel, together
When can also make the even tissue of casting module, can also improve casting cold-heading die steel quenching degree.
Tetra- kinds of elements of Gr, Mo, V, Ni are being considered to casting the influence of cold heading die mechanical property, especially to casting
Cold heading die hardness, tensile strength, the influence of impact flexibility and by range analysis, the application employs the level of four factor three
Orthogonal test method, selects L9(3 4) orthogonal arrage is tested, and the chemical composition of the casting cold-heading die steel of design is：C
0.6-1.0%, Si 0.8-1.2%, Mn 0.7-1.0%, P≤0.03%, S≤0.03%, Cr 4.5-5.5%, Mo 1.0-
1.5%, V 0.7-1.2%, Ni 1.0-1.3%, Cu 0.5-1.0%；
2nd, the preparation technology of perfect casting cold upsetting die of car is designed：
The control for casting cold-heading die steel material is most important to casting the performance of cold upsetting die of car.Casting cold-heading die steel
Molten steel must be steel cleaning, even tissue, segregation it is slight, etc. the good high-quality steel of tropism.Therefore, wanting deoxidation in fusion process
Slagging-off is thorough, improves molten steel cleanness, and adds cerium cleaning molten steel and improve the impact flexibility of material, cold to ensure casting
The inherent quality of upsetting mould steel material.
The application first adds mild steel using the medium-frequency induction furnace smelting metal of acid lining, treats that molten steel is melted to 75-
When 85%, the ferrochrome of formula ratio is first added, add molybdenum-iron, vanadium iron, metal nickel sheet, ferrosilicon, the ferromanganese of formula ratio, be eventually adding
The coverture being made up of rice-straw ash and dry charcoal is covered, and is warming up to 1650 DEG C ± 5 DEG C, after after furnace charge all fusing, is cooled to
1480-1500 DEG C, the cathode copper of formula ratio is added, stand 5 minutes, deoxidation slagging-off.Smelting metal gross weight will be accounted for before going out molten steel
The metallic cerium of 0.15-0.25% is placed in casting ladle bottom, is sufficiently stirred for after molten steel injection casting ladle, and the deoxidation again in casting ladle, takes off
Oxygen is skimmed totally after finishing, and during molten steel poured into precoated sand cold upsetting die of car casting mold, obtains the part blank of casting cold upsetting die of car.
3rd, the Strengthening and Toughening treatment of casting cold upsetting die of car
Casting cold upsetting die of car is different with forging cold upsetting die of car, and complete equipilibrium can not possibly be reached during casting solidification, has into
Divide segregation to exist, this influence to hardness and intensity is insensitive, but the influence of On Impact Toughness is fairly obvious, casting can be caused
The impact flexibility reduction of cold upsetting die of car.In order to ensure to cast cold upsetting die of car existing intensity and wearability high, while have good again
Good toughness, it is necessary to which Strengthening and Toughening treatment is carried out to casting cold upsetting die of car blank.Carry out conditioning treatment first, with crystal grain thinning,
Machining stress, uniform unbalance microstructure etc. are eliminated, is that finished heat treatment below establishes good organization foundation.Then carry out
High temperature quenching+high tempering, to improve the plasticity and toughness of casting cold upsetting die of car.
Cold upsetting die of car blank is heated to 910-930 DEG C during conditioning treatment, 1.5-2 hours is incubated, cooled to the furnace
Come out of the stove at 520-530 DEG C air cooling.
Cold upsetting die of car blank is heated to 1080-1120 DEG C when high temperature quenches, 2-2.5 hours is incubated, immediately water-cooled.
Cold upsetting die of car blank after will be quenched during high tempering is reheated to 780 ± 5 DEG C, is incubated 3.5 hours, then
Come out of the stove air cooling.
4th, the Surface hardening treatment of cold upsetting die of car is cast
On the basis of possessing certain intensity and toughness, hardness and wear resistance is casting cold upsetting die of car (particularly cavity plate)
The determinant in life-span, particularly in the case of cold headers productivity ratio more and more higher, the hardness and wearability of cold upsetting die of car are more
Plus seem important.In order to improve the case hardness of casting cold upsetting die of car, good anti-wear performance is made it have, compared by analyzing
Compared with using the case hardness of gas nitriding processing method raising casting cold upsetting die of car.
Surface gas Nitrizing Treatment is carried out to the casting cold upsetting die of car after machined.Its technological specification is：Heating temperature
580 DEG C of degree；Soaking time 42h；Room temperature is air cooled to after treatment.
Embodiment casts the preparation of cold upsetting die of car
1st, test material
(1) casting cold upsetting die of car tests raw material chemical composition as shown in table 1-1.
Table 1-1 tests the chemical composition (unit of raw material：Wt%)
(2) casting cold upsetting die of car chemical composition is as shown in table 1-2.
Table 1-2 casts cold upsetting die of car chemical composition (Wt%)
| C | Si | Mn | P | S | Cr | Mo | V | Ni | Cu |
| 0.8 | 1.0 | 0.9 | 0.03 | 0.02 | 5.0 | 1.3 | 1.0 | 1.2 | 0.8 |
2nd, test apparatus equipment
QTC-5000 stokeholds molten iron carbon silicomanganese phosphorus analyzer, HTV-1000 metallographic microscopes, Hitachi S-3400N scanning electricity
Mirror, the Material Testing Machine of Instron 8801, WDW3100 microcomputers control universal electrical testing machine, MCT-110 precision digital thermometrics
Instrument, Shanghai experimental electric furnace factory produce 50 ㎏ medium-frequency induction furnaces.
3rd, the preparation of cold upsetting die of car is cast
Using the medium-frequency induction furnace smelting metal of acid lining, mild steel is first added, treat that molten steel is melted to 75-85%
When, the ferrochrome of formula ratio is added, molybdenum-iron, vanadium iron, metal nickel sheet, ferrosilicon, the ferromanganese of formula ratio are added, it is eventually adding by straw
The grey coverture covering (rice-straw ash and the mass ratio of dry charcoal are 70% ︰ 30% in coverture) constituted with dry charcoal, is warming up to
1650 DEG C ± 5 DEG C, after after furnace charge all fusing, 1480-1500 DEG C is cooled to, adds the cathode copper of formula ratio, stand 5 minutes,
Deoxidation removes the gred.The metallic cerium for going out before molten steel to account for smelting metal gross weight 0.15-0.25% is placed in casting ladle bottom, and molten steel injection is poured
It is sufficiently stirred for after bag, and the deoxidation again in casting ladle, deoxidation is skimmed totally after finishing, and molten steel is poured into the casting of precoated sand cold upsetting die of car
In type, you can obtain casting the part blank of cold upsetting die of car.
4th, the Strengthening and Toughening treatment of casting cold upsetting die of car
1. conditioning treatment
Cold upsetting die of car blank is heated to 910-930 DEG C, 1.5-2 hours is incubated, come out of the stove when cooling to 520-530 DEG C with the furnace
Air cooling.
2. high temperature quenching+high tempering
Cold upsetting die of car blank is heated to 1080-1120 DEG C, 2-2.5 hours is incubated, immediately water-cooled.
Cold upsetting die of car blank after will be quenched is reheated to 780 ± 5 DEG C, is incubated 3.5 hours, air cooling of then coming out of the stove.
5th, the Surface hardening treatment of cold upsetting die of car is cast
Casting cold upsetting die of car after machined carries out surface gas Nitrizing Treatment.
Technological specification：
Heating-up temperature：580℃.
Soaking time：42h.
Room temperature is air cooled to after treatment.
6th, result of the test
Fig. 1, Fig. 2 and Fig. 3 are the metallographic structures of the attached casting sample of casting cold upsetting die of car of the invention, be can see by figure,
Dispersed precipitate the carbide particle of the high rigidity such as a considerable amount of VC, Cr3C, Mo6C in tissue, and is evenly distributed.This shows
Casting cold upsetting die of car material is tempered sorbite by reinforcement particle and the phase composition of matrix two, its matrix, and reinforcement particle is then equal
It is distributed evenly wherein.This is a kind of tissue of typical high-abrasive material, there is the preferable matrix of obdurability, and embedding securely therein
The component for having hard component, hard protrusion bears pressure as support frame.Therefore, the intensity of this material, hardness and
Anti-wear performance is good, and has preferable plasticity toughness simultaneously.Fig. 4 is the attached casting sample stretching fracture pattern of casting cold upsetting die of car
Figure, by Fig. 4 it can be seen that, fracture shows as obvious dimpled fracture feature, and with part tear rib, because alloy
There is tiny reinforcement particle in matrix, because matrix is softer, a part can produce dimple, it is a part of then with favourable crystal face
Cracking, forms Quasi cleavage face, and these crackles are interconnected causes eventual failure.Fracture apperance further illustrates casting of the invention
Making cold upsetting die of car has preferable plasticity and toughness.Table 1-3 is mechanics properties testing result.Result shows, casting cold heading die of the invention
Tool not only has intensity hardness high, and plasticity toughness is good.Table 1-4 is the forging for casting cold upsetting die of car and Cr12MoV materials
The refrigeration upsetting die life table of comparisons, as shown by data in table, compared with the forging cold upsetting die of car of Cr12MoV materials, the present invention
Casting cold upsetting die of car service life extend 50-60%, and simplify manufacturing process, shorten the manufacturing cycle, reduce
Manufacturing cost, therefore have very much DEVELOPMENT PROSPECT.
Table 1-3 casts cold upsetting die of car mechanics properties testing result
Table 1-4 casts cold upsetting die of car with forging cold upsetting die of car (Cr12MoV) service life table of comparisons
Note：Data in table 1-4 are under Nanning three-tree automobile component manufacture Co., Ltd working condition
The data for drawing.
Claims (1)
1. it is a kind of cast cold upsetting die of car manufacture method, it is characterized in that：
(1) cold upsetting die of car steel chemical composition is cast：C 0.6-1.0%, Si 0.8-1.2%, Mn 0.7-1.0%, P≤0.03%,
S≤0.03%, Cr 4.5-5.5%, Mo 1.0-1.5%, V 0.7-1.2%, Ni 1.0-1.3%, Cu 0.5-1.0%；
(2) the manufacturing process of cold upsetting die of car is cast：
Using the medium-frequency induction furnace smelting metal of acid lining, mild steel is first added, when molten steel is melted to 75-85%, first
The ferrochrome of formula ratio is added, molybdenum-iron, vanadium iron, metal nickel sheet, ferrosilicon, the ferromanganese of formula ratio is added, is eventually adding by rice-straw ash
The coverture covering constituted with dry charcoal, is warming up to 1650 DEG C ± 5 DEG C, after after furnace charge all fusing, is cooled to 1480-1500
DEG C, the cathode copper of formula ratio is added, 5 minutes are stood, deoxidation slagging-off.Smelting metal gross weight 0.15- will be accounted for before going out molten steel
0.25% metallic cerium is placed in casting ladle bottom, is sufficiently stirred for after molten steel injection casting ladle, and the deoxidation again in casting ladle, and deoxidation is finished
After skim clean, during molten steel poured into precoated sand cold upsetting die of car casting mold, obtain the part blank of casting cold upsetting die of car；
(3) the Strengthening and Toughening treatment of casting cold upsetting die of car：
Conditioning treatment:Cold upsetting die of car blank is heated to 910-930 DEG C, 1.5-2 hours is incubated, 520-530 is cooled to the furnace
DEG C when come out of the stove air cooling；
High temperature quenches and high tempering:Cold upsetting die of car blank is heated to 1080-1120 DEG C, 2-2.5 hours is incubated, immediately water
It is cold；Cold upsetting die of car blank after will be quenched is reheated to 780 ± 5 DEG C, is incubated 3.5 hours, air cooling of then coming out of the stove；
(4) the Surface hardening treatment of cold upsetting die of car is cast：
Casting cold upsetting die of car after machined carries out surface gas Nitrizing Treatment.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109750232A (en) * | 2017-11-08 | 2019-05-14 | 韩国机械硏究院 | Cast steel and the steel product manufacturing method for utilizing it |
| EP3889285A4 (en) * | 2018-11-28 | 2022-07-06 | Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd. | High-nitrogen and high-chromium plastic die steel, and smelting method and thermal processing method therefor |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1511969A (en) * | 2002-11-06 | 2004-07-14 | 大同特殊钢株式会社 | Alloy tool steel and its producing method and mold using it |
| JP2005023375A (en) * | 2003-07-02 | 2005-01-27 | Daido Steel Co Ltd | High hardness steel having excellent cold workability, heat resistance and wear resistance |
| CN101104903A (en) * | 2007-08-07 | 2008-01-16 | 广西大学 | Low-temperature titanium addition method for preparing TiCp/Fe composite material by in situ reaction casting method |
| CN103128505A (en) * | 2013-02-04 | 2013-06-05 | 繁昌县琪鑫铸造有限公司 | Preparation method of high-strength steel cable bolt |
| CN103403206A (en) * | 2011-02-21 | 2013-11-20 | 日立金属株式会社 | Cold-work tool steel exhibiting superior machinability |
| JP2014141716A (en) * | 2013-01-24 | 2014-08-07 | Kobe Steel Ltd | Steel wire material excellent in mechanical descaling property and manufacturing method of steel wire |
| CN104400359A (en) * | 2014-11-28 | 2015-03-11 | 杨帆 | Method for preparing foundation bolts |
| CN104498829A (en) * | 2014-12-12 | 2015-04-08 | 中国第一汽车股份有限公司 | Casting medium alloy steel for cold stamping mould of automobile |
| CN105695703A (en) * | 2014-11-28 | 2016-06-22 | 重庆基石机械有限公司 | Heat treatment process for die steel |
-
2017
- 2017-03-07 CN CN201710131951.6A patent/CN106917045B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1511969A (en) * | 2002-11-06 | 2004-07-14 | 大同特殊钢株式会社 | Alloy tool steel and its producing method and mold using it |
| JP2005023375A (en) * | 2003-07-02 | 2005-01-27 | Daido Steel Co Ltd | High hardness steel having excellent cold workability, heat resistance and wear resistance |
| CN101104903A (en) * | 2007-08-07 | 2008-01-16 | 广西大学 | Low-temperature titanium addition method for preparing TiCp/Fe composite material by in situ reaction casting method |
| CN103403206A (en) * | 2011-02-21 | 2013-11-20 | 日立金属株式会社 | Cold-work tool steel exhibiting superior machinability |
| JP2014141716A (en) * | 2013-01-24 | 2014-08-07 | Kobe Steel Ltd | Steel wire material excellent in mechanical descaling property and manufacturing method of steel wire |
| CN103128505A (en) * | 2013-02-04 | 2013-06-05 | 繁昌县琪鑫铸造有限公司 | Preparation method of high-strength steel cable bolt |
| CN104400359A (en) * | 2014-11-28 | 2015-03-11 | 杨帆 | Method for preparing foundation bolts |
| CN105695703A (en) * | 2014-11-28 | 2016-06-22 | 重庆基石机械有限公司 | Heat treatment process for die steel |
| CN104498829A (en) * | 2014-12-12 | 2015-04-08 | 中国第一汽车股份有限公司 | Casting medium alloy steel for cold stamping mould of automobile |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109750232A (en) * | 2017-11-08 | 2019-05-14 | 韩国机械硏究院 | Cast steel and the steel product manufacturing method for utilizing it |
| EP3889285A4 (en) * | 2018-11-28 | 2022-07-06 | Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd. | High-nitrogen and high-chromium plastic die steel, and smelting method and thermal processing method therefor |
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