CN105671444B - A kind of Austenitic Hot Work Die Steel and its Technology for Heating Processing - Google Patents
A kind of Austenitic Hot Work Die Steel and its Technology for Heating Processing 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
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
Abstract
A kind of Austenitic Hot Work Die Steel, the composition and mass percent of the mould steel are：C：0.72%~0.80%, Si：0.90%~1.10%, Mn：11.0%~15.0%, Cr：0.60%~0.90%, Mo：0.80%~1.20%, V：1.40%~1.80%, N：0.030%~0.050%, Y：0.02%~0.10%, P<0.020%, S<0.008%, surplus is Fe.The Technology for Heating Processing of Austenitic Hot Work Die Steel of the present invention, first carries out steel ingot homogenizing annealing, and steel ingot is forged into blank after annealing；Then in 1250 DEG C~1400 DEG C solution treatment 0.5 hour~1 hour, in 750 DEG C~800 DEG C Ageing Treatments 2 hours~6 hours.Not only alloy total content is few by the design, production cost is low, and high high-temp stability is good, service life is long.
Description
Technical field
The present invention relates to metallurgical casting field, more particularly to a kind of Austenitic Hot Work Die Steel and its Technology for Heating Processing, tool
Body is applied to improve the high high-temp stability of mould steel.
Background technology
The service temperature of conventional martensitic type hot die steel is usually no more than 700 DEG C, such as H13, HD.Austenitic heat
Make mould steel matrix decomposition is not present because matrix is single austenite, during high-temperature service and softens problem, if matrix and analysis
Go out that phase control is proper, can be used above and keep good hardness and toughness at 700 DEG C.Forming austenitic matrix needs to add surely
Determine the alloying element of austenite, because austenitic matrix is softer, also need to add the second phase formation element of reinforcing matrix.It is existing
The addition of austenite mould steel alloying element is more, and production cost is higher, how to ensure austenite mould Steel Properties and matter
On the premise of amount, manufacturing cost is reduced, is the development trend of mould steel technology, be also that following development of austenite mould steel becomes
Gesture.
Chinese patent application publication No. is CN101302602A, and data of publication of application is the patent of invention on November 12nd, 2008
A kind of rare earth austenite hot work die steel material is disclosed, the composition and percentage by weight of hot die steel are：C：0.3~
0.7%, Si：0.5~1%, Mn：10.5~15%, Cr：2.0~6.0%, Mo：1.5~3.5%, V：0.5~2.0%, P：0.01~
0.02%,S<0.005%, rare earth element:0.003~0.01%, Fe surplus.The preparation method of hot die steel be melting after dispensing,
Casting, electroslag remelting, in 1240~1290 DEG C of high-temperature homogenizations；Carry out rough forge, blank forging and annealing, then 1140~
1200 DEG C of solution treatment and 700~760 DEG C of Ageing Treatments.Although the invention can make mould steel have high intensity, high tenacity, its
Still suffer from following defect：
1st, the Cr contents of the invention are higher, and Cr23C6 is easily separated out in the fabrication process causes grain coarsening, reduces this
The high high-temp stability of invention, intensity declines very fast when causing the mould steel to work in high temperature environments, causes the mould steel
Service life is shorter.
2nd, the rare earth element content of the invention is too low, causes the high-temperature oxidation resistance of the invention weaker, and the mould steel is solid
Austenite crystal is easily roughened during molten processing, causes that the mould steel high high-temp stability is poor, service life is short.
3rd, the total amount of adding of the alloying element of the invention is more, and production cost is higher.
The content of the invention
The purpose of the present invention is that there is provided a kind of high temperature the problem of overcoming the difference of high high-temp stability present in prior art
The good Austenitic Hot Work Die Steel of heat endurance and its Technology for Heating Processing.
To realize object above, technical solution of the invention is：
A kind of Austenitic Hot Work Die Steel, the composition and mass percent of the mould steel are：
C：0.72%~0.80%, Si：0.90%~1.10%, Mn：11.0%~15.0%, Cr：0.60%~0.90%, Mo：
0.80%~1.20%, V：1.40%~1.80%, N：0.030%~0.050%, Y：0.02%~0.10%, P<0.020%, S<
0.008%, surplus is Fe.
The composition and mass percent of the mould steel be：C：0.76%, Si：1.0%, Mn：13.0%, Cr：0.75%, Mo：
1.0%, V：1.60%, N：0.040%, Y：0.06%, P：0.010%, S：0.004%, surplus is Fe.
A kind of Technology for Heating Processing of Austenitic Hot Work Die Steel, comprises the following steps：
A, the steel ingot progress homogenizing annealing by the mould steel, the blank being forged into steel ingot carry out rough annealing；
B, by above-mentioned blank solution treatment:Solid solubility temperature is 1250 DEG C~1400 DEG C, and soaking time is 0.5 hour~1 small
When；
C, by the blank Ageing Treatment after solution treatment：Aging temp be 750 DEG C~800 DEG C, aging time be 2 hours~
6 hours, now mould steel heat treatment completion.
In a steps, the steel ingot of the mould steel carries out homogenizing annealing and referred to：By steel ingot at 1300 DEG C~1400 DEG C
Insulation 8 hours~10 hours, the rough annealing refers to：The blank that steel ingot is forged into is incubated 4 hours at 900 DEG C~950 DEG C
~6 hours.
Compared with prior art, beneficial effects of the present invention are：
1st, the composition and mass percent of a kind of Austenitic Hot Work Die Steel of the invention are：C：0.72%~0.80%, Si：
0.90%~1.10%, Mn：11.0%~15.0%, Cr：0.60%~0.90%, Mo：0.80%~1.20%, V：1.40%~1.80%,
N：0.030%~0.050%, Y：0.02%~0.10%, P<0.020%, S<0.008%, surplus is Fe, each composition in above-mentioned formula
Design advantage is：Y：0.02%~0.10%, rare earth element yttrium can help most alloying elements to be dissolved in solution treatment
Austenite, so that mould steel a large amount of disperse educts second in Ageing Treatment mutually strengthen austenitic matrix；In addition, yttrium segregation
In austenite grain boundary, it is ensured that austenite grain size will not be too thick during solution treatment, the high temperature of mould steel is effectively improved
Intensity, toughness and high-temperature oxidation resistance；V：1.40%~1.80%, content and the nitrogen of the v element of the design match, when
Vanadium disperse educt in the form of vanadium carbide nitride during effect processing, vanadium carbide nitride can strengthen austenitic matrix, and the heat for improving mould steel is strong
Property；C：0.72%~0.80%, the content that the design improves carbon can expand austenite region, the carbon shape in Ageing Treatment
Into alloy carbide, the matrix strength of mould steel is improved, while improving carbon element content can accordingly be reduced in mould steel formula
Nitrogen, the content of manganese are so as to reduce the cost of material of mould steel；Cr：0.60%~0.90%, the design is by reducing containing for chromium
Measure to suppress Cr23C6 precipitation, effectively prevent grain coarsening, improve the high high-temp stability of mould steel, reduce raw material into
This；Mo：0.80%~1.20%, the molybdenum element of the design is separated out in the form of Mo2C, strengthens the elevated temperature strength and high temperature of mould steel
Wearability, while reducing the content of molybdenum, reduces cost of material；Mn：11.0%~15.0%, manganese is austenite former, manganese member
Cellulose content is more than 11% essential condition for being acquisition austenitic matrix after the design mould steel solution treatment, if the manganese member of the design
Cellulose content is more than 15%, can cause mould steel processing hardening strongly, machining becomes difficult；The alloying element addition of the design
Total amount is less, effectively can reduce production cost while austenite mould Steel Properties are improved with quality.Therefore, the design exists
The high-temperature oxidation resistance and high high-temp stability of mould steel are significantly improved while reduction cost of material.
2nd, solution treatment in a kind of Technology for Heating Processing of Austenitic Hot Work Die Steel of the invention:Solid solubility temperature be 1250 DEG C~
1400 DEG C, soaking time is 0.5~1 hour, because the design mould steel contains 0.02%~0.10% yttrium, it is necessary to using higher
Solid solution temperature, make alloying element is as much as possible to be dissolved into solid solution, alloying element is dissolved in austenite by the design
Ratio bring up to more than 98%, alloying element is more uniformly distributed in austenite, greatly enhance follow-up timeliness strong
Change effect.Ageing Treatment：Aging temperature control is at 750 DEG C~800 DEG C, and aging time is 2~6 hours, at solid solution
Alloying element dissolving is abundant in reason, cause in Ageing Treatment can a large amount of phase of disperse educt second, so as to strengthen precipitation strength
Effect, effectively improves the high high-temp stability and inoxidizability of austenite mould steel.Therefore, the solution treatment of the design can be by
Most alloying elements are dissolved in austenitic steel, are effectively enhanced the reinforcing effect of Ageing Treatment, are effectively improved mould steel
High high-temp stability.
3rd, steel ingot homogenizing annealing in a kind of Technology for Heating Processing of Austenitic Hot Work Die Steel of the invention：Homogenizing annealing temperature
Spend for 1300 DEG C~1400 DEG C, soaking time is 8 hours~10 hours, the design carries out homogenization using higher temperature and moved back
Fire, makes the chemical composition and microstructure homogenization of mould steel, effectively prevents microsegregation, is that follow-up solution treatment and Ageing Treatment are carried
Basis is supplied.Therefore, the steel ingot homogenizing annealing step of the design can make the chemical composition and microstructure homogenization of mould steel.
Brief description of the drawings
Fig. 1 is the tissue SEM photograph of the embodiment of the present invention 1.
Fig. 2 is the heat endurance change curve of the embodiment of the present invention 1.
Embodiment
Below in conjunction with brief description of the drawings, the present invention is further detailed explanation with embodiment.
Referring to Fig. 1, Fig. 2, a kind of Austenitic Hot Work Die Steel, the composition and mass percent of the mould steel are：
C：0.72%~0.80%, Si：0.90%~1.10%, Mn：11.0%~15.0%, Cr：0.60%~0.90%, Mo：
0.80%~1.20%, V：1.40%~1.80%, N：0.030%~0.050%, Y：0.02%~0.10%, P<0.020%, S<
0.008%, surplus is Fe.
The composition and mass percent of the mould steel be：C：0.76%, Si：1.0%, Mn：13.0%, Cr：0.75%, Mo：
1.0%, V：1.60%, N：0.040%, Y：0.06%, P：0.010%, S：0.004%, surplus is Fe.
A kind of Technology for Heating Processing of Austenitic Hot Work Die Steel, comprises the following steps：
A, the steel ingot progress homogenizing annealing by the mould steel, the blank being forged into steel ingot carry out rough annealing；
B, by above-mentioned blank solution treatment:Solid solubility temperature is 1250 DEG C~1400 DEG C, and soaking time is 0.5 hour~1 small
When；
C, by the blank Ageing Treatment after solution treatment：Aging temp be 750 DEG C~800 DEG C, aging time be 2 hours~
6 hours, now mould steel heat treatment completion.
In a steps, the steel ingot of the mould steel carries out homogenizing annealing and referred to：By steel ingot at 1300 DEG C~1400 DEG C
Insulation 8 hours~10 hours, the rough annealing refers to：The blank that steel ingot is forged into is incubated 4 hours at 900 DEG C~950 DEG C
~6 hours.
The principle of the present invention is described as follows：
The performance of Austenitic Hot Work Die Steel depends on precipitated phase in the size and austenitic matrix of austenitic matrix crystal grain
Species, form, size and distribution.The selection of the chemical element of the austenite mould steel of the present invention and control reason are as follows：
C：0.72%~0.80%, carbon can expand austenite region, and nitrogen and manganese in formula can be reduced by improving carbon content
Content, reduction cost of material.The intensity of matrix can be improved by increasing carbon content simultaneously, and the different alloy carbides of formation reach
Strengthen the effect of matrix.But carbon content is too high, the toughness and high temperature anti-fatigue performance of mould steel can be reduced.
Si：0.90%~1.10%, silicon is solid-solution in Ovshinsky physical efficiency solution strengthening mould steel, enhancing drawing hardening effect, high temperature
Timeliness can effectively suppress the precipitation of alloyed cementite, improve the spread of alloy carbide, strengthen the anti-softening ability of matrix and anti-
Oxidability.The silicone content of present component mould steel is more than 1.1%, and the effect above is not obvious.
Mn：11.0%~15.0%, manganese is austenite former, manganese be more than 11% be inventive die steel solution treatment after
Obtain the essential condition of austenitic matrix.After manganese is more than 15%, processing hardening is strong, and machining becomes difficult.
Cr：0.60%~0.90%, chromium dissolves in austenite, plays solution strengthening effect to austenitic matrix, is analysed during Ageing Treatment
The alloy carbide gone out plays precipitation enhancement.According to the carbon content of inventive die steel, by the content control of chromium 0.60%~
0.90%, it can effectively suppress Cr23C6 precipitation, prevent from reducing cost of material while grain coarsening.
Mo：0.80%~1.20%, molybdenum dissolves in austenite, and solution strengthening effect is played to austenitic matrix.Analysed during Ageing Treatment
Go out carbide and play precipitation enhancement, strengthen the elevated temperature strength and wearability of mould steel.The molybdenum content of inventive die steel exceedes
When 1.20%, the effect above is not notable, therefore the design reduces the content of molybdenum, effectively reduces cost of material.
V：1.40%~1.80%, vanadium is mainly worked in the form of carbonitride.During solution treatment, the carbonitride of vanadium can
Fining austenite grains, improve the obdurability of mould steel；During Ageing Treatment, the vanadium carbide nitride of a large amount of disperse educts can strengthen Austria
Family name's body matrix, improves the elevated temperature strength and hardness of mould steel, enhances the high high-temp stability of mould steel.Inventive die steel
Content of vanadium more than 1.80% when, Ageing Treatment effect is not notable.
N：0.030%~0.050%, nitrogen dissolves in austenite, plays a part of stable and expands austenite phase field.Ageing Treatment
When, nitrogen makes carbide vanadium be separated out in the form of more stable, more disperse vanadium carbide nitride, improves the height of mould steel
Warm intensity and hardness, enhance the high high-temp stability of mould steel.When nitrogen content is more than 0.050% due to alloy of the present invention member
Cellulose content is relatively low to cause fixed nitrogen difficult, therefore Control of Nitrogen Content is in 0.030%~0.050%, best results.
Y：0.02%~0.10%, yttrium improves the elevated temperature strength and high-temperature oxidation resistance of mould steel, and addition yttrium can be improved
The solid solubility temperature of solution treatment, so as to ensure that most alloying elements dissolve in austenite in high temperature, is increased at timeliness
The precipitating reinforcing effect of reason；Yttrium segregation is at austenite grain boundary simultaneously, it is ensured that austenite grain size during solution treatment
Will not be too thick, effectively increase the high high-temp stability of mould steel.Yttrium content is very few to be unfavorable for keeping brilliant during high temperature
Grain refinement.
P ＜ 0.020%, S ＜ 0.008%, p and ses are the major impurities of inventive die steel.Phosphorus content is more than
0.020%, mould steel is also easy to produce crackle；Sulphur is more than 0.008% and sulfide easily occurs, reduces the plasticity and toughness of mould steel.Sulphur and phosphorus
Content should be reduced as far as possible.
The characteristics of Austenitic Hot Work Die Steel of the present invention has high thermal stability, high tenacity, at 800 DEG C, hardness is not
Less than 40HRC；Room temperature impact work(is more than 200J.The Austenitic Hot Work Die Steel of the present invention has cost low and high temperature heat steady simultaneously
Qualitative good advantage.
Solution treatment:The solid solubility temperature of the design is 1250 DEG C~1400 DEG C, and soaking time is 0.5~1 hour, due to this
Design mould steel contains 0.02%~0.10% yttrium, it is necessary to using higher solid solution temperature, make alloying element as many as possible
Be dissolved into solid solution, the ratio that alloying element dissolves in austenite is brought up to more than 98% by the design, makes alloying element more
Uniformly it is distributed in austenite, greatly enhances follow-up ageing strengthening effect.
Ageing Treatment：The design controls aging temperature at 750 DEG C~800 DEG C, and aging time is 2~6 hours, by
Alloying element dissolving is abundant in solution treatment, cause in Ageing Treatment can a large amount of phase of disperse educt second, so as to strengthen
Precipitation strength effect, effectively improves the high high-temp stability and inoxidizability of austenite mould steel.
Embodiment 1：
Referring to Fig. 1, Fig. 2, a kind of Austenitic Hot Work Die Steel, the composition and mass percent of the mould steel are：C：
0.75%, Si：0.95%, Mn：12.3%, Cr：0.70%, Mo：0.90%, V：1.70%, N：0.030%, Y：0.05%, P：0.015%,
S：0.007%, surplus is Fe.
A kind of Technology for Heating Processing of Austenitic Hot Work Die Steel, comprises the following steps：
A, the steel ingot progress homogenizing annealing by the mould steel：Homogenizing annealing temperature：1300 DEG C, soaking time：8 is small
When；It is forged into blank, rough annealing：Annealing temperature：930 DEG C, soaking time：5 hours；
B, by above-mentioned blank solution treatment:Solid solubility temperature is 1350 DEG C, and soaking time is 0.5 hour；
C, by the blank Ageing Treatment after solution treatment：Aging temp is 800 DEG C, and aging time is 5 hours, now mould
Steel heat treatment is completed.
7 × 10 × 55 mm of above-mentioned mould steel3 The room temperature impact work(of non-notch sample is：Forging stock impact of collision work(295J,
Forging stock side knock work(202J.
Embodiment 2：
A kind of Austenitic Hot Work Die Steel, the composition and mass percent of the mould steel are：C：0.72%, Si：1.05%,
Mn：13.2%, Cr：0.75%, Mo：1.00%, V：1.65%, N：0.040%, Y：0.09%, P：0.019%, S：0.006%, surplus is
Fe。
A kind of Technology for Heating Processing of Austenitic Hot Work Die Steel, comprises the following steps：
A, the steel ingot progress homogenizing annealing by the mould steel：Homogenizing annealing temperature：1350 DEG C, soaking time：8 is small
When；It is forged into blank, rough annealing：Annealing temperature：910 DEG C, soaking time：4 hours；
B, by above-mentioned blank solution treatment:Solid solubility temperature is 1300 DEG C, and soaking time is 1 hour；
C, by the blank Ageing Treatment after solution treatment：Aging temp is 750 DEG C, and aging time is 4 hours, now mould
Steel heat treatment is completed.
7 × 10 × 55 mm of above-mentioned mould steel3 The room temperature impact work(of non-notch sample is：Forging stock impact of collision work(310J,
Forging stock side knock work(230J.
Embodiment 3：
A kind of Austenitic Hot Work Die Steel, the composition and mass percent of the mould steel are：C：0.80%, Si：0.99%,
Mn：13.8%, Cr：0.60%, Mo：0.80%, V：1.40%, N：0.043%, Y：0.04%, P：0.017%, S：0.005%, surplus is
Fe。
A kind of Technology for Heating Processing of Austenitic Hot Work Die Steel, comprises the following steps：
A, the steel ingot progress homogenizing annealing by the mould steel：Homogenizing annealing temperature：1300 DEG C, soaking time：8 is small
When；It is forged into blank, rough annealing：Annealing temperature：900 DEG C, soaking time：4 hours；
B, by above-mentioned blank solution treatment:Solid solubility temperature is 1250 DEG C, and soaking time is 1 hour；
C, by the blank Ageing Treatment after solution treatment：Aging temp is 800 DEG C, and aging time is 2 hours, now mould
Steel heat treatment is completed.
7 × 10 × 55 mm of above-mentioned mould steel3 The room temperature impact work(of non-notch sample is：Forging stock impact of collision work(315J,
Forging stock side knock work(236J.
Embodiment 4：
A kind of Austenitic Hot Work Die Steel, the composition and mass percent of the mould steel are：C：0.76%, Si：1.10%,
Mn：11.7%, Cr：0.90%, Mo：1.20%, V：1.58%, N：0.039%, Y：0.10%, P：0.014%, S：0.003%, surplus is
Fe。
A kind of Technology for Heating Processing of Austenitic Hot Work Die Steel, comprises the following steps：
A, the steel ingot progress homogenizing annealing by the mould steel：Homogenizing annealing temperature：1300 DEG C, soaking time：8 is small
When；It is forged into blank, rough annealing：Annealing temperature：900 DEG C, soaking time：4 hours；
B, by above-mentioned blank solution treatment:Solid solubility temperature is 1280 DEG C, and soaking time is 0.7 hour；
C, by the blank Ageing Treatment after solution treatment：Aging temp is 750 DEG C, and aging time is 3 hours, now mould
Steel heat treatment is completed.
7 × 10 × 55 mm of above-mentioned mould steel3 The room temperature impact work(of non-notch sample is：Forging stock impact of collision work(308J,
Forging stock side knock work(226J.
Embodiment 5：
A kind of Austenitic Hot Work Die Steel, the composition and mass percent of the mould steel are：C：0.73%, Si：1.08%,
Mn：15.0%, Cr：0.86%, Mo：1.14%, V：1.80%, N：0.050%, Y：0.09%, P：0.010%, S：0.001%, surplus is
Fe。
A kind of Technology for Heating Processing of Austenitic Hot Work Die Steel, comprises the following steps：
A, the steel ingot progress homogenizing annealing by the mould steel：Homogenizing annealing temperature：1300 DEG C, soaking time：8 is small
When；It is forged into blank, rough annealing：Annealing temperature：900 DEG C, soaking time：4 hours；
B, by above-mentioned blank solution treatment:Solid solubility temperature is 1350 DEG C, and soaking time is 0.6 hour；
C, by the blank Ageing Treatment after solution treatment：Aging temp is 800 DEG C, and aging time is 5 hours, now mould
Steel heat treatment is completed.
7 × 10 × 55 mm of above-mentioned mould steel3 The room temperature impact work(of non-notch sample is：Forging stock impact of collision work(300J,
Forging stock side knock work(206J.
Claims (4)
1. a kind of Austenitic Hot Work Die Steel, it is characterised in that the composition and mass percent of the mould steel be：
C：0.72%~0.80%, Si：0.90%~1.10%, Mn：11.0%~15.0%, Cr：0.60%~0.90%, Mo：0.80%~
1.20%, V：1.40%~1.80%, N：0.030%~0.050%, Y：0.02%~0.10%, P<0.020%, S<0.008%, surplus is
Fe。
2. a kind of Austenitic Hot Work Die Steel according to claim 1, it is characterised in that the composition and matter of the mould steel
Measuring percentage is：
C：0.76%, Si：1.0%, Mn：13.0%, Cr：0.75%, Mo：1.0%, V：1.60%, N：0.040%, Y：0.06%, P：
0.010%, S：0.004%, surplus is Fe.
3. a kind of Technology for Heating Processing of the Austenitic Hot Work Die Steel described in claim 1 or 2, it is characterised in that：At the heat
Science and engineering skill comprises the following steps：
A, the steel ingot progress homogenizing annealing by the mould steel, the blank being forged into steel ingot carry out rough annealing；
B, by above-mentioned blank solution treatment:Solid solubility temperature is 1250 DEG C~1400 DEG C, and soaking time is 0.5 hour~1 hour；
C, by the blank Ageing Treatment after solution treatment：Aging temp is 750 DEG C~800 DEG C, and aging time is 2 hours~6 small
When, now mould steel heat treatment is completed.
4. a kind of Technology for Heating Processing of Austenitic Hot Work Die Steel according to claim 3, it is characterised in that：
In a steps, the steel ingot of the mould steel carries out homogenizing annealing and referred to：By steel ingot in 1300 DEG C~1400 DEG C insulations
8 hours~10 hours, the rough annealing referred to：The blank that steel ingot is forged into is small in 900 DEG C~950 DEG C insulations 4 hours~6
When.
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Citations (5)
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| CN1904122A (en) * | 2006-08-07 | 2007-01-31 | 易正伦 | High performance hot work mould steel |
| CN101302602A (en) * | 2008-07-01 | 2008-11-12 | 上海大学 | Rare earth austenite hot work die steel and preparation thereof |
| CN101942606A (en) * | 2010-09-21 | 2011-01-12 | 上海大学 | Nitrogen alloyed austenitic hot work die steel and preparation method thereof |
| CN102876996A (en) * | 2011-07-14 | 2013-01-16 | 宝山钢铁股份有限公司 | Austenitic hot-work die steel and preparation method thereof |
| CN103993223A (en) * | 2014-05-06 | 2014-08-20 | 上海大学 | Ultrahigh thermal conductivity wear-resistant hot stamping die steel and manufacturing method thereof |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1904122A (en) * | 2006-08-07 | 2007-01-31 | 易正伦 | High performance hot work mould steel |
| CN101302602A (en) * | 2008-07-01 | 2008-11-12 | 上海大学 | Rare earth austenite hot work die steel and preparation thereof |
| CN101942606A (en) * | 2010-09-21 | 2011-01-12 | 上海大学 | Nitrogen alloyed austenitic hot work die steel and preparation method thereof |
| CN102876996A (en) * | 2011-07-14 | 2013-01-16 | 宝山钢铁股份有限公司 | Austenitic hot-work die steel and preparation method thereof |
| CN103993223A (en) * | 2014-05-06 | 2014-08-20 | 上海大学 | Ultrahigh thermal conductivity wear-resistant hot stamping die steel and manufacturing method thereof |
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