CN108660390A - A kind of high impact toughness cold work die steel and preparation method thereof - Google Patents
A kind of high impact toughness cold work die steel and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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- 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
- C21D6/002—Heat treatment of ferrous alloys containing Cr
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- 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
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- 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
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- 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
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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
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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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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Abstract
The present invention provides a kind of high impact toughness cold work die steel and preparation method thereof, which includes the following element of percentage：C, 0.45~0.50%；Si, 0.10~0.30%；Mn, 0.40~0.60%；Cr, 4.80~5.30%；Mo, 2.20~2.40%；V, 0.50~0.90%；Surplus is iron and inevitable impurity element.The preparation method is：Melting steel ingot, and electroslag remelting is carried out using the steel ingot as consutrode, obtain liquid metals；The liquid metals is cooled to ESR ingot；Forging processing is carried out after the ESR ingot is kept the temperature 2~4h at 1190~1220 DEG C, is quenched and is tempered successively, the high impact toughness cold work die steel is obtained.The alloy element component of cold work die steel of the present invention designs, and is that C and Cr are suitably reduced on the basis of Cr12MoV, increases Mo and V, and good microscopic structure is obtained to reduce simultaneously refining eutectic carbide, crystal grain thinning.
Description
Technical field
The present invention relates to a kind of high impact toughness cold work die steels and preparation method thereof.Have more particularly, to one kind excellent
Microscopic structure, and the cold mold material with high impact toughness.Suitable for cold forming precise punching mould cold forging, automobile component
Bending mould, hydroforming die.
Background technology
Cold work die steel is mainly for the manufacture of the mold of progress compression moulding under the conditions of cold state (room temperature), such as cold stretch
Mold, cold upsetting die of car, cold extrusion die, imprint mold, rolling die etc..Some phases of the operating condition and cutlery of cold-working mold
Seemingly, but because machined material deforms in the cold state, therefore resistance of deformation is very big.Compared with cutting tool steel, cold work die steel should require
Higher quenching degree, wearability and toughness, and the requirement of red hardness can be lower, temperature raising will not when general cold-working mold work
More than 200-300 DEG C.
Currently, the cold working die steel material that domestic mold materials are most widely used in the market is high carbon and chromium cold-working mold
Steel Cr12MoV selects universal cold working die steel material as main.And with higher quenching degree, hardenability, wearability, high temperature
Antioxygenic property is good, universal cold working die steel material can be used as manufacturing cold-working mold for various purposes, such as shape
Complicated punching concave die, cold extruding die, roll threading wheel, cold shears cutter and fine measuring instrument etc..But this Cr12MoV is universal
Contain higher carbon and chromium (material chemical composition mass percent in alloying element composition in cold working die steel material
For：C 1.45~1.70%, Si≤0.40%, Mn≤0.40%, Cr11.0~12.5%, Mo0.4~0.6, Ni≤0.10, Cu
≤ 0.10, P≤0.030%, S≤0.030%), and excessive carbon and chromium content can make that there are nets in material microstructure
The ledeburite carbide of shape causes the notched bar impact strength of material not high.Mold in use easy tipping, be broken or collapse.
The performance indicator of Cr12MoV steel is, after 980 DEG C of quenchings, 200 DEG C of tempering, notched bar impact strength 50J/cm,
Microscopic structure is AS12 grades.And these performance indicators are the key technical index of cold work die steel.Cold-working mold is mainly used for gold
The cold forming, including cold stamping, cold extrusion and cold-heading etc. of category or nonmetallic materials.This kind of mold work load is big, dimensional accuracy,
Surface quality requirements are high.The cold work die steel requirement usually selected has enough intensity, toughness, hardness and wearability.And
Cr12MoV steel is due to containing non-uniform ledeburite carbide in tissue, although by having higher hardness after Q-tempering
And wear-resisting property, but toughness is relatively low.It is easy to happen in actual use and bursts apart and collapse.
Above-mentioned Cr12MoV steel uses arc melting, is cast into steel ingot hammer cogging, and specific steps are followed successively by steel-making, forging
It makes, be heat-treated, eventually form product.Its heating temperature forged is 1110 DEG C -1130 DEG C, and final forging temperature is >=900 DEG C, cooling
Mode is using high annealing, the cold or sand cooling in hole.Since Cr12MoV steel forms a large amount of coarse eutectics in continuous net-shaped distribution
Carbide.This netted eutectic carbide seriously isolates matrix, is alternatively arranged as formation of crack and crack propagation when mould steel fracture
Approach, so that the crystal boundary serious embrittlement of mould steel, toughness are very low.And in forging, due to being limited by forging ratio,
For large scale strand, the eutectic carbide of center portion is difficult to smash, so being frequently present of in mold structure of steel after forging
Cold Roll is segregated, and the performance of mould steel is made anisotropy occur.And it due to the presence of netted eutectic carbide, is forging
It is susceptible to waste product caused by cracking and burning etc. in the process.
Invention content
The present invention is for optimization, organizational controls, the metallurgical quality control of mould steel steel grade composition, forging, roll process control, confession
The novel of novel high impact toughness value is developed in the research work such as organizational controls, the application technology of goods state and use state
Cold work die steel applies to the high-end market of die industry to substitute traditional cold working die steel material.
The present invention is achieved by the following technical solutions：
A kind of high impact toughness cold work die steel comprising the following element of percentage：C, 0.45~
0.50%；Si, 0.10~0.30%；Mn, 0.40~0.60%；Cr, 4.80~5.30%；Mo, 2.20~2.40%；V、0.50
~0.90%；Surplus is iron and inevitable impurity element.
Preferably, the impurity element includes S and P, wherein content of the content of S not higher than 0.005%, P is not
Higher than 0.018%.
The composition design principle of each element is in the high impact toughness cold work die steel of the present invention：On the basis of Cr12MoV
It is appropriate to reduce C and Cr, increase Mo elements, to reduce simultaneously refining eutectic carbide, crystal grain thinning, to refine steel microscopic structure
The notched bar impact strength that steel is substantially improved is achieved the effect that.Alloying component：The main conjunction of the high impact toughness value cold work die steel
Gold element is (mass percent)：C, 0.45~0.50%；Si, 0.10~0.30%；Mn, 0.40~0.60%；P、<
0.018%；S、<0.005%；Cr, 4.80~5.30%；Mo, 2.20~2.40%；V0.50~0.90%, surplus Fe.And
And following relationship should be met：C=1/20Cr+1/15Mo+1/8V, because in the present invention, chromium, molybdenum and v element are all
Strong carbide forms alloying element, they and carbon combination can form M23C7, M7C3, MC2 type carbide, suitable carbide
Type and quantity are the bases that material obtains high microscopic structure and high impact toughness, only the content and carbon of chromium, molybdenum and v element
The content of element, which meets above-mentioned relationship, could make material obtain best microscopic structure, this best microscopic structure
It is characterized in being distributed on the body of microscopic structure for M23C7, M7C3, MC2 type carbide presentation fine uniform, to ensure that
The high impact toughness value and best microscopic structure of material.
It is effect and its restriction explanation of essential element of the present invention below：
C 0.45~0.50%
C carbons are one of main chemical elements of high-strength toughness cold working die steel, are to form vanadium carbide, molybdenum carbide
With the indispensable basic element of the various carbide such as chromium carbide, and the even tissue of the component segregation and steel of influence steel
The important element of property, being dissolved in martensite can ensure that martensite possesses good intensity and quenching degree.Phosphorus content increases in steel
Add, yield point and tensile strength increase, but plasticity and impact reduce.In addition, carbon can increase the cold brittleness and aging sensitivity of steel
Property.For the design composition of steel compared with Cr12MoV steel, carbon content has larger reduction, and the purpose is to improve the microscopic structure of steel
In carbide distribution and property, improve the rank of the net carbide of steel.Lower carbon element content can prevent steel from existing
Segregation tissue is generated during solidification to cause the bending strength and impact toughness decreased of steel.Therefore, if carbon content is high
In this composition design upper limit, the formation of excessive carbide and the segregation of tissue will be caused to generate, the netted performance for influencing steel refers to
Mark, especially causes the impact flexibility of steel to reduce；But carbon will also cause carbon less than the scope of design of this ingredient
With other alloying elements combine formed carbide equivalent occur deviation, be not effectively form stable tiny carbide and
The compound action of carbide influences the intensity of steel and the performance of steel.
Si0.10~0.30%
Si, which is dissolved in matrix, can improve matrix strength, and when tempering can hinder the decomposition of martensite to improve steel belt roof bolt
Stablize, reducing agent and deoxidier can be played the role of in steelmaking process.Silicon can significantly improve the elastic limit of steel, yield point
And tensile strength.Element silicon can effectively hinder point of martensite in the drawing process after the transformation of austenite to martensite
Solution, this mainly growing up and expand ε-carbide stable region by ε-carbide particle of drawing up, delays ε-carbide to Fe3C's
Transformation.The purpose of control of the silicone content of this patent is the decomposition in drawing process after further preventing martensite transfor mation, to carrying
The impact property value of high steel after quenching has certain effect.
Mn 0.40~0.60%
Mn has largely been added in matrix during austenitizing, is improved the alloy content in matrix, is added
Strong solution strengthening effect, to improve the intensity of matrix.But Mn has serious normal segregation to be inclined to, and can be enriched in eutectic cell crystalline substance
Intergranular carbide is formed at boundary, can reduce the toughness of material.In a certain range by Mn control of element, it is therefore an objective to increase matrix
Intensity, and the performance of material is made to stablize.
Cr4.80~5.30%
Cr is carbide, can improve the quenching degree of material.But Cr is also the master that net carbide is formed
Reason is wanted, influences the toughness of material, therefore the content of Cr is unsuitable excessively high.Containing 11.0~13.0% Cr in CrMoV steel, this
A little Cr and C have formed netted ledeburite carbide, and the carbide of these chromium is unevenly distributed in the crystallization process of steel, not only
It affects chromium and promotes the effect of quenching degree in steel grade, and reduce the intensity and notched bar impact strength index of steel.Reduce Cr
Content, it is therefore an objective to keep materials microstructure uniform, improve the toughness of material.On the other hand it reduces the content of Cr also while reducing
The manufacturing cost of alloying element.
Mo2.20~2.40%, V0.50~0.90%
Mo and V forms the Second Phase Precipitation object of disperse in steel, and the precipitate of these disperses can not only play precipitation by force
Change acts on, and can effectively hinder growing up for austenite grain, improves the impact flexibility of material.And due to Mo and V with
The affinity of carbon atom is strong, and the decomposition rate of martensite is reduced in drawing process, improves the stability of steel.With Cr12MoV
Compared to Mo and V content is properly increased, group is made to be woven with more proeutectoid carbide disperse educt, so that martensite is had sufficiently high strong
Degree, improves notched bar impact strength and has refined microscopic structure.
P ＜ 0.018%
Phosphorus is the harmful element in steel, increases the brittleness of steel, reduces the impact flexibility of steel, therefore P elements control is more traditional
Cold work die steel it is lower, the raising of On Impact Toughness performance index value has certain effect.
S ＜ 0.005%
Element sulphur be easy to cause the deterioration of the processing performance of steel in certain degree, is easy so that steel is in hot worked mistake
Overheat and burn-off phenomenon are generated in journey.Therefore control sulfur content is lower compared with original technology Cr12MoV steel can improve steel processing
Performance and mechanical performance, especially to diameter forging machine hammer cogging when continuous forging processing caused by superheating phenomenon play it is quasi-
The effect of system.The notched bar impact strength that can reduce steel is precipitated in the crystal boundary of S, and therefore, notched bar impact strength can be improved by reducing S contents.
Preferably, each weight percent with element is respectively：C, 0.47~0.49%；Si, 0.12~
0.25%；Mn, 0.43~0.58%；Cr, 4.98~5.10%；Mo, 2.25~2.30%；V, 0.60~0.88%.
A kind of preparation method of high impact toughness cold work die steel as the aforementioned comprising following steps：
Melting steel ingot, and electroslag remelting is carried out using the steel ingot as consutrode, obtain liquid metals；
The liquid metals is cooled to ESR ingot；
Forging processing is carried out after the ESR ingot is kept the temperature 2~4h at 1190~1220 DEG C,
It is quenched and is tempered successively, obtain the high impact toughness cold work die steel.
Preferably, control initial forging temperature is 1020~1060 DEG C, and final forging temperature is not less than 830 DEG C.Due to this
Steel has best high temperature thermoplasticity, is conducive in the austenite one phase tissue regions that 1020~1060 DEG C of temperature ranges are steel
High temperature deformation working process, it is not easy to generate high temperature hot-working cracking.Since steel ingot finishing temperature has steel ingot rolling quality
Important influence, diameter forging machine stop forging the control range that temperature is less than defined, are very easy to that steel ingot is caused to be opened in diameter forging machine forging
Ingot cracking is generated during base, still, stops forging temperature and easily causes steel after diameter forging machine hammer cogging higher than control range and produce
Cast steel tissue coarse-grain phenomenon, is unfavorable for refinement microstructure, and form serious net carbide, reduces the impact flexibility of steel
Energy.
Preferably, the ESR ingot is 80~120 DEG C/h in the heating rate for being heated to 1190~1220 DEG C.Steel
The thermal stress sensibility of ingot during heating is higher, easy tos produce stress cracking, and heating rate control can in 80~120 DEG C/h
To prevent steel ingot from generating crack due to thermal stress during heating, 2~4 hours are kept the temperature after being heated to 1190~1220 DEG C, is made
Obtaining the temperature of whole surface to the center portion of steel ingot can keep uniform, can improve the malleable shape of steel ingot in this way, prevent steel from existing
Tearing tendency in forging process, and the microscopic structure index of steel can be improved, improve the toughness of steel.
Preferably, the temperature of the quenching is 1020~1040 DEG C, and the temperature of the tempering is 500~550 DEG C.
The control of 1020~1040 DEG C of hardening heat, 500~550 DEG C of temperature, hardening heat mainly considers in austenite
For the purpose of carbide uniformly dissolves in, the control of temperature mainly considers the precipitation strength effect of the carbide of Cr and Mo and V,
And Soxhlet body tissue is formed, the hardness and toughness of steel are improved, and there is good microscopic structure.
Compared with prior art, the present invention has following advantageous effect：
1, the alloy element component design of cold work die steel of the present invention, is suitably to reduce C and Cr on the basis of Cr12MoV,
Increase Mo and V, good microscopic structure is obtained to reduce simultaneously refining eutectic carbide, crystal grain thinning；
2, since steel of the present invention is compared with Cr12MoV steel, alloying element content is low, point of the carbide in microscopic structure
The rank of cloth and property net carbide is all greatly improved.Therefore under the conditions of same forging ratio, this patent steel ratio
Cr12MoV can more make dendroid carbide morphology in the tissue of as cast condition obtain better fragmentation, refine the microscopic structure of steel, carry
High steel impact flexibility performance；
3, rational chemical composition proportioning and advanced manufacturing process make the performance indicator of steel be obviously improved, traditional
Cr12MoV steel notched bar impact strengths are 50J/cm, microscopic structure for AS12 grade and steel of the present invention quenches 520 DEG C times by 1030 DEG C
After burning hot processing, ballistic work 150J/cm, microscopic structure reaches AS5 grades, and the notched bar impact strength of steel improves 3 times.
Specific implementation mode
With reference to specific embodiment, the present invention is described in detail.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection domain.
Embodiment 1
In this example, using the Composition Control value and its weight of high toughness wear resistant cold work die steel chemical element proportioning composition
Percentage is as follows：
C, 0.48%；Si, 0.15%；Mn, 0.50%；Cr, 5.10%；Mo, 2.30%；V, 0.60%；P, 0.013%；
S, 0.003%；Fe surpluses.
In the present embodiment, the technical process of cold work die steel and steps are as follows：
It is positioned in electroslag remelting device as consutrode using the steel ingot for carrying out being cast into after melting in induction furnace,
Electroslag remelting is carried out, liquid metals is fallen to by the slag blanket of slag bath in following water mold, then is frozen into steel ingot again；
Above-mentioned Heating Steel Ingots to 1230 DEG C of temperature range inside holdings are subjected to forging processing after 4 hours；Initial forging temperature：1100 DEG C, finish-forging
870 DEG C of temperature.
The treatment process temperature of Q-tempering controls：1030 DEG C of hardening heat；530 DEG C of temperature
Reach AS6 grades using the microscopic structure rank of the high impact toughness value cold work die steel of the present embodiment, it is more universal
Cold work die steel Cr12MoV improve 100%；Notched bar impact strength 150J/cm, more universal cold work die steel Cr12MoV are carried
It is high by 300%.
The specific chemical composition (weight percent Wt%) of embodiment 2~6 is shown in Table 1, and process parameter control is shown in Table 2 institutes
Show, performance indicator is shown in Table 3.
Table 1
| Embodiment | C | Mn | Cr | Si | Mo | V | P | S |
| 2 | 0.47 | 0.43 | 4.80 | 0.12 | 2.20 | 0.60 | 0.015 | 0.003 |
| 3 | 0.50 | 0.40 | 5.20 | 0.10 | 2.28 | 0.50 | 0.018 | 0.002 |
| 4 | 0.45 | 0.52 | 5.00 | 0.25 | 2.25 | 0.70 | 0.015 | 0.003 |
| 5 | 0.47 | 0.60 | 5.30 | 0.19 | 2.27 | 0.90 | 0.012 | 0.005 |
| 6 | 0.49 | 0.58 | 4.98 | 0.30 | 2.30 | 0.88 | 0.011 | 0.004 |
Table 2
Table 3
Mould steel prepared by embodiment 1, which is found out, is uniform-distribution with the tiny carbide particle of disperse on martensitic matrix, this
The metallographic microstructure of sample ensures that steel of the present invention has excellent notched bar impact strength.There are ledeburite carbides by conventional Cr12MoV
Segregation leads to the decline of material impact toughness.
Comparative example 1
This comparative example is a kind of cold work die steel in high alloy through disclosed in Chinese patent CN1854324, chemical analysis weight
Degree is：C, 1.45~1.55%, Cr, 7.8~8.2%, V, 3.9~4.1%, Mo, 1.4~1.6%, Si, 0.9~
1.1%, Mn, 0.3~0.5%, remaining Fe.
Comparative example 2
This comparative example is a kind of high-strength toughness cold working die steel disclosed in Chinese patent CN101182619, chemical analysis
Weight percent content is：C, 0.9~1.0%, Cr9~10%, V0.8~1.0%, Mo, 2.0%, Si, 1.0%, remaining Fe.
The comparative analysis of Examples 1 to 6 and comparative example 1~2 is as follows：From the comparison of composition as can be seen that the change of this patent
It is lower than the patent retrieved to study the carbon content in the constituent content of part, silicone content, chromium content etc., patent CN1854324's
Chemical analysis composition compared with the chemical analysis that this technology designs have the special feature that be containing higher carbon and v element, and
The segregation for reducing primary carbide in the chemical analysis composition of this technology containing lower carbon content and chromium content, increases Mo
Content can form the Second Phase Precipitation object of disperse in steel, and the precipitate of these disperses can not only play refinement microstructure
Effect, and can effectively hinder growing up for austenite grain, improve the notched bar impact strength of material.Related patents
The chemical element design that traditional cold-working steel is compareed in the Design of Chemical Composition of CN101182619, suitably reduces the content of Cr
(but being compared or high with the Cr elemental compositions design in this technology), increases the content of V element, mainly according to
By the alloy carbide invigoration effect of Cr and V element, improve the hardness of material, but due to carbon, chromium in process of setting easy shape
It is insufficient so as to cause the toughness of steel at a large amount of primary carbide.The above analysis can show the machine of this technology and correlation technique
Reason and the design concept of ingredient are different froms, and there is also larger difference for the proportioning of chemical composition.
In conclusion only presently preferred embodiments of the present invention, is not used for limiting the scope of implementation of the present invention, it is all according to
The equivalent changes and modifications carried out by shape, construction, feature and spirit described in scope of the invention as claimed should all be included in this
In the right of invention.
Claims (7)
1. a kind of high impact toughness cold work die steel, which is characterized in that the following element including percentage：C、0.45
~0.50%；Si, 0.10~0.30%；Mn, 0.40~0.60%；Cr, 4.80~5.30%；Mo, 2.20~2.40%；V、
0.50~0.90%；Surplus is iron and inevitable impurity element.
2. high impact toughness cold work die steel as described in claim 1, which is characterized in that the impurity element includes S and P,
Wherein, content of the content of S not higher than 0.005%, P is not higher than 0.018%.
3. high impact toughness cold work die steel as described in claim 1, which is characterized in that each weight percent with element
Number is respectively：C, 0.47~0.49%；Si, 0.12~0.25%；Mn, 0.43~0.58%；Cr, 4.98~5.10%；Mo、
2.25~2.30%；V, 0.60~0.88%.
4. a kind of preparation method of high impact toughness cold work die steel as described in claim 1, which is characterized in that including as follows
Step：
Melting steel ingot, and electroslag remelting is carried out using the steel ingot as consutrode, obtain liquid metals；
The liquid metals is cooled to ESR ingot；
Forging processing is carried out after the ESR ingot is kept the temperature 2~4h at 1190~1220 DEG C,
It is quenched and is tempered successively, obtain the high impact toughness cold work die steel.
5. such as the preparation method of claim 4 high impact toughness cold work die steel, which is characterized in that in the forging processing, control
Initial forging temperature processed is 1020~1060 DEG C, and final forging temperature is not less than 830 DEG C.
6. such as the preparation method of claim 4 high impact toughness cold work die steel, which is characterized in that the ESR ingot is being heated to
1190~1220 DEG C of heating rate is 80~120 DEG C/h.
7. such as the preparation method of claim 4 high impact toughness cold work die steel, which is characterized in that the temperature of the quenching is
1020~1040 DEG C, the temperature of the tempering is 500~550 DEG C.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109306434A (en) * | 2018-09-28 | 2019-02-05 | 上大鑫仑材料科技（广东）有限公司 | A kind of cold stamping shaping dies steel and the preparation method and application thereof |
| CN109355574A (en) * | 2018-12-13 | 2019-02-19 | 天津钢研海德科技有限公司 | A kind of cutter ring alloy of high abrasion high tenacity and preparation method thereof |
| CN109852777A (en) * | 2019-01-18 | 2019-06-07 | 西华大学 | A kind of H13 mould steel and its heat treatment process |
| CN113897547A (en) * | 2021-10-08 | 2022-01-07 | 内蒙古北方重工业集团有限公司 | Cr-Mo-V type medium carbon hot work die steel and tissue spheroidizing method thereof |
| CN114166605A (en) * | 2021-12-07 | 2022-03-11 | 安徽林洪重工科技有限公司 | Method for simulating and predicting core structure performance of large-size CrMo steel component |
| CN115094337A (en) * | 2022-07-22 | 2022-09-23 | 上海大学(浙江)高端装备基础件材料研究院 | Ultrahigh-strength alloy steel, 19.8-grade threaded fastener and preparation method thereof |
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| CN109306434A (en) * | 2018-09-28 | 2019-02-05 | 上大鑫仑材料科技（广东）有限公司 | A kind of cold stamping shaping dies steel and the preparation method and application thereof |
| CN109355574A (en) * | 2018-12-13 | 2019-02-19 | 天津钢研海德科技有限公司 | A kind of cutter ring alloy of high abrasion high tenacity and preparation method thereof |
| CN109852777A (en) * | 2019-01-18 | 2019-06-07 | 西华大学 | A kind of H13 mould steel and its heat treatment process |
| CN109852777B (en) * | 2019-01-18 | 2021-09-28 | 西华大学 | H13 die steel and heat treatment process thereof |
| CN113897547A (en) * | 2021-10-08 | 2022-01-07 | 内蒙古北方重工业集团有限公司 | Cr-Mo-V type medium carbon hot work die steel and tissue spheroidizing method thereof |
| CN114166605A (en) * | 2021-12-07 | 2022-03-11 | 安徽林洪重工科技有限公司 | Method for simulating and predicting core structure performance of large-size CrMo steel component |
| CN114166605B (en) * | 2021-12-07 | 2024-03-29 | 安徽林洪重工科技有限公司 | Method for simulating and predicting core tissue performance of large-size CrMo steel member |
| CN115094337A (en) * | 2022-07-22 | 2022-09-23 | 上海大学(浙江)高端装备基础件材料研究院 | Ultrahigh-strength alloy steel, 19.8-grade threaded fastener and preparation method thereof |
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