CN110205454A - 1.2316 pre- hard hardening plastic mold steel and preparation method thereof - Google Patents
1.2316 pre- hard hardening plastic mold steel and preparation method thereof Download PDFInfo
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- CN110205454A CN110205454A CN201910314349.5A CN201910314349A CN110205454A CN 110205454 A CN110205454 A CN 110205454A CN 201910314349 A CN201910314349 A CN 201910314349A CN 110205454 A CN110205454 A CN 110205454A
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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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
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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
- C21D1/32—Soft annealing, e.g. spheroidising
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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
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/58—Oils
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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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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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
- C22C38/40—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
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Abstract
1.2316 pre- hard hardening plastic mold steels of one kind and preparation method thereof, the invention belongs to mould steel preparation technical fields, it include: comprising: which 1.2316 pre- hard hardening plastic mold steels are successively carried out quenching after soft annealing, stepwise heating and tempering, its step are as follows: S1 soft annealing: 550 DEG C of in-furnace temperature being heated to 760-780 DEG C and is kept the temperature, soaking time is 3min/mm, is cooled to 500 DEG C and comes out of the stove；Quench after S2 stepwise heating: the in-furnace temperature mode of clicking before quenching heats up: in-furnace temperature being warming up to T1 temperature, then is warming up to T2 temperature, then heats to T3 temperature；S3 tempering: in-furnace temperature is 520-540 DEG C, and soaking time 3min/mm comes out of the stove air-cooled, then repeatedly tempering.It is grown up with preventing and treating the crystal grain of 1.2316 pre- hard hardening plastic mold steels, guarantee obtains homogeneous austenite structure and eliminates extra-stress.
Description
Technical field
The invention belongs to mould steel preparation technical fields, in particular to a kind of 1.2316 pre- hard hardening plastic molds
Steel and preparation method thereof.
Background technique
1.2316 be moral label number, is similar to China 3Cr17NiMo, because it is with excellent wear-resisting corrosivity, toughness, anti-
The advantages that thermal fatigue, is commonly used in plastic mould field.But 1.2316 pre- hard hardening plastic mold steels are added due to alloying element
Enter, reduces Ms point and easily crack over time.1.2316 after pre- vigour matter, it is desirable to obtain uniform fine grain
Grain tissue (7-8 grades).
But the problem is that: due to the addition of alloying element, Ms point is reduced, tempering link is only quenched in pre- vigour matter
Fiery martensite decomposes, and has obtained statenchyma.But retained austenite decomposes and is not decomposed in time, over time, easily
It cracks.Meanwhile the addition of alloying element, component segregation is easily caused, the uniformity for easily causing local coarse-grain, influencing crystal grain.
Summary of the invention
The first object of the present invention is to provide a kind of preparation method of 1.2316 pre- hard hardening plastic mold steels, with prevention and treatment
The crystal grain of 1.2316 pre- hard hardening plastic mold steels is grown up, and guarantee obtains homogeneous austenite structure and eliminates extra-stress.
The second object of the present invention is to provide a kind of 1.2316 pre- hard hardening plastic mold steels, with crystal grain uniformly,
Austenite is uniformly distributed and advantage not easy to crack.
The present invention is implemented as follows:
The present invention proposes a kind of 1.2316 pre- hard hardening plastic mold steel preparation methods comprising: by 1.2316 pre- vigours
Matter plastic die steel quenches after successively carrying out soft annealing, stepwise heating and tempering, and its step are as follows:
S1 soft annealing: being heated to 760-780 DEG C for 550 DEG C of in-furnace temperature and keep the temperature, soaking time 3min/
Mm is cooled to 500 DEG C and comes out of the stove；
Quench after S2 stepwise heating: the in-furnace temperature mode of clicking before quenching heats up: in-furnace temperature is warming up to
T1 temperature, then it is warming up to T2 temperature, then heat to T3 temperature；
S3 tempering: in-furnace temperature is 520-540 DEG C, and soaking time 3min/mm comes out of the stove air-cooled, then repeats back to
Fire processing.
Further, the T1 temperature after step S2 stepwise heating in quenching is 380-400 DEG C, and T2 temperature is 640-660 DEG C,
T3 is 840-860 DEG C.
Further, the soaking time of T1, T2 and T3 after step S2 stepwise heating in quenching are 0.5min/mm.
Further, in step S2, it is warming up to 1020-1040 DEG C again after being warming up to T3 temperature, soaking time 1min/
Then mm carries out out oil-temper at 120-150 DEG C.Oil is cold to be calculated as 1h/100mm.
Further, further include before step S1 smelt, specific steps be followed successively by EAF (electric furnace slightly refines), LF (ladle refining),
VD (vacuum outgas) and casting.
The present invention proposes a kind of 1.2316 pre- hard hardening plastic mold steels, by 1.2316 above-mentioned pre- hard hardening plastic molds
The preparation method of steel and obtain.
Above scheme the utility model has the advantages that the system of 1.2316 pre- hard hardening plastic mold steels of some offers of the embodiment of the present invention
Preparation Method prevents crystal grain from growing up by reducing softening annealing temperature；Stepwise heating is used before quenching, guarantees that alloy is fully dissolved in
Under the premise of austenite, homogeneous austenite structure is obtained；It is quenched it is pre- it is hard after, carrying out a tempering, eliminating residual austenite
Body generates additional stress when being tempered.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in the embodiment of the present invention
Technical solution is clearly and completely described, it is clear that described embodiments are some of the embodiments of the present invention, rather than complete
The embodiment in portion.Therefore, claimed is not intended to limit to the detailed description of the embodiment of the present invention of offer below
The range of invention, but it is merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Some embodiments of the invention provide a kind of 1.2316 pre- hard hardening plastic mold steel preparation methods comprising: it will
1.2316 pre- hard hardening plastic mold steels quench after successively carrying out soft annealing, stepwise heating and tempering, and step is such as
Under:
Soft annealing further includes smelting, and specific steps are followed successively by EAF (electric furnace slightly refines), LF (ladle refining), VD, and (vacuum is de-
Gas) and casting.
Smelt main points: pinner ash 15Kg, overall process control Ar gas as required, are restored with Ca powder, the diffusion of Al powder,
Change and feed Al line 5M/T, Ca-Si line 3M/T clearly, skim clean, white slag refining evacuates 20-23 minutes, breaks empty plus argon gas
After ring rushes argon, slotting AL to 0.10%Ca-Si line 3M/T Re (rhenium) 1Kg/T adds Cr-N 6kg/T eventually.Re, which is inserted into furnace, keeps faint
Argon gas after ten minutes properly tap by temperature.1580 DEG C -1590 DEG C of tapping temperature,1555-1565 DEG C of ladle temperature.1570 DEG C -1580 DEG C of tapping temperature,1545 DEG C -1555 DEG C of ladle temperature.
Burden process: it is 3200Kg that ingredient 1, which includes: 1.2316, and OCr18Ni9 140Kg, 1.2085 be 2540Kg, Fe-
Mo 35Kg (note: Cr-N does not calculate Cr content in ingredient).
Ingredient 2:Cr17Ni2 vehicle bits are 1800Kg, and 1.2085 be 5950Kg, HCr 30Kg, Fe-Mo 110Kg.
Batching control ingredient: 0.35% Si of C, 0.45% Mn, 0.57% Cr15.45% Ni0.85%
Mo1.03%.
Casting: ensure running gate system cleaning, drying.Argon for protecting pouring.Argon is rushed to feed trumpet and Mo Nei before ingot steel casting
5min, reinforcing filling prevents shrinkage cavity.Covering slag 12Kg/ branch, exothermic mixture 10Kg/ branch, carbonization rice husk 5Kg/ branch.It protects
Protect slag 2Kg/T, carbonization rice husk 0.5Kg/ branch.
Macrostructure: GB/T226 standard detection is pressed.Center porosity and pattern segregation≤2 grade must not have white point, crackle, contracting
The defects of hole, bubble.
Chemical component: chemical component is detected by GB/T223, GB/T222 and GB/T4336 standard sample.
1.2316 chemical component
Then forged: then gas-fired furnace point 2 sections of heating, 1200 DEG C of heat preservations, 3 hours bar holds melt down heating,
Keep the temperature 5 hours jumping-ups.Forging ratio: >=5,4500 tons of fast forging hydraulic press forgings, 1200 DEG C of initial forging temperature, final forging temperature >=950 DEG C；Forging
It is fitted into furnace and anneals immediately afterwards.
Refering to fig. 1, S1 soft annealing: being heated to 760-780 DEG C for 550 DEG C of in-furnace temperature and keep the temperature, soaking time
For 3min/mm, be cooled to 500 DEG C come out of the stove it is air-cooled；
Hardness: GB/T231 standard detection hardness is pressed.Ontology hardness determination≤HB255 is qualification after annealing.
Roughing: GB/T908 standard detection dimensional tolerance is pressed.Thickness+5/-10mm, width -10/+15mm.
A: after ultrasonic examination is qualified, sawing machine tack, sampling.
B: milling machine, fine feed first mill a plane, and subject to large area casting skin, turn-over is milled after flaw detection is qualified.
C: last knife for milling each face will reduce the depth of cut, and cooling with oil, improve surface roughness.Meet tolerance to want
It asks.
Ultrasonic examination: by SEP1921- standard carry out ultrasonic examination, qualified rank E/e grades, individual defect≤Ф's 3
Number must not exceed 2, and dispersed distribution.
Then stress relief annealing technique is carried out, referring to Fig.2, including 1.2316 pre- vigour matter after handling above-mentioned steps
It is 520-540 DEG C, soaking time 3min/mm that plastic die steel, which carries out in-furnace temperature, lower than 400 DEG C at a temperature of come out of the stove sky
It is cold.1. heating speed is fast for former heating curves, and heavy wall (thickness >=220mm) uneven heating is even to cause grain size different.
It should be noted that in an embodiment of the present invention, soaking time unit min/mm refers to steel ingot maximum gauge
Every millimeter keeps the temperature one minute, such as the steel ingot maximum gauge of processing is 100mm, then soaking time is 100min.
Mirco structure detection is carried out again: by the detection of GB/T10561 standard sample, evaluation non-metallic inclusion, qualified rank
No more than the respective specified in table.
1.2316 non-metallic inclusion
Microscopic structure: it is detected by GB/T1299 standard sample.It is not allow for strip chain and bulk carbide exists.
Referring to Fig. 3, quenching after S2 stepwise heating: the in-furnace temperature mode of clicking before quenching heats up: will be in furnace
Temperature is warming up to T1 temperature, then is warming up to T2 temperature, then heats to T3 temperature；In some embodiments of the invention, step
T1 temperature after S2 stepwise heating in quenching is 380-400 DEG C, and T2 temperature is 640-660 DEG C, and T3 is 840-860 DEG C, in this hair
In bright some embodiments, the soaking time of T1, T2 and T3 after step S2 stepwise heating in quenching are 0.5min/mm.
In step S2, it is warming up to 1020-1040 DEG C again after being warming up to T3 temperature, soaking time 1min/mm, then at 120-150 DEG C
Under carry out out oil-temper.Oil is cold to be calculated as 1h/100mm.
Referring to Fig. 4, S3 tempering: in-furnace temperature is 520-540 DEG C, and soaking time 3min/mm comes out of the stove air-cooled,
Then tempering is repeated.It should be noted that in some embodiments of the invention, hardening hardness requirement after modifier treatment
HRC28-32
It is only 1. tempered after original quenching, the retained austenite generated after quenching, retained austenite decomposes and becomes after tempering
Non-equilibrium microstructure produces new stress.New stress will make 1.2316 mold steel plates etc. generate ageing crack.
1. being tempered, the retained austenite generated after quenching produces new stress after tempering, then after being 2. tempered, both
The non-equilibrium microstructure that ensure that pre- hardness (HRC28-32), while retained austenite being generated, is changed into statenchyma, eliminates
Stress, avoids the generation of ageing crack.
The present invention proposes a kind of 1.2316 pre- hard hardening plastic mold steels, by 1.2316 above-mentioned pre- hard hardening plastic molds
The preparation method of steel and obtain.
Above scheme the utility model has the advantages that the system of 1.2316 pre- hard hardening plastic mold steels of some offers of the embodiment of the present invention
Preparation Method prevents crystal grain from growing up by reducing softening annealing temperature；Stepwise heating is used before quenching, guarantees that alloy is fully dissolved in
Under the premise of austenite, homogeneous austenite structure is obtained；It is quenched it is pre- it is hard after, carrying out a tempering, eliminating residual austenite
Body generates additional stress when being tempered.
Embodiment 1
The preparation method of 1.2316 pre- hard hardening plastic mold steels is present embodiments provided, S1 soft annealing: by 550 DEG C
In-furnace temperature is heated to 760 DEG C and is kept the temperature, soaking time 3min/mm, be cooled to 500 DEG C come out of the stove it is air-cooled；
Quench after S2 stepwise heating: the in-furnace temperature mode of clicking before quenching heats up: in-furnace temperature is warming up to
380 DEG C, then 640 DEG C are warming up to, 840-860 DEG C is then heated to, then be warming up to 1020 DEG C, soaking time 1min/mm, then
Oil-temper is carried out out at 120 DEG C.Oil is cold to be calculated as 1h/100mm；
S3 tempering: in-furnace temperature is 520 DEG C, and soaking time 3min/mm comes out of the stove air-cooled, then repeats back
Fire processing.
Embodiment 2
The preparation method of 1.2316 pre- hard hardening plastic mold steels is present embodiments provided, S1 soft annealing: by 550 DEG C
In-furnace temperature is heated to 780 DEG C and is kept the temperature, soaking time 3min/mm, be cooled to 500 DEG C come out of the stove it is air-cooled；
Quench after S2 stepwise heating: the in-furnace temperature mode of clicking before quenching heats up: in-furnace temperature is warming up to
400 DEG C, then 660 DEG C are warming up to, 840-860 DEG C is then heated to, then be warming up to 1040 DEG C, soaking time 1min/mm, then
Oil-temper is carried out out at 150 DEG C.Oil is cold to be calculated as 1h/100mm；
S3 tempering: in-furnace temperature is 540 DEG C, and soaking time 3min/mm comes out of the stove air-cooled, then repeats back
Fire processing.
Embodiment 3
The preparation method of 1.2316 pre- hard hardening plastic mold steels is present embodiments provided, S1 soft annealing: by 550 DEG C
In-furnace temperature is heated to 765 DEG C and is kept the temperature, soaking time 3min/mm, be cooled to 500 DEG C come out of the stove it is air-cooled；
Quench after S2 stepwise heating: the in-furnace temperature mode of clicking before quenching heats up: in-furnace temperature is warming up to
385 DEG C, then it is warming up to 640-660 DEG C, 845 DEG C are then heated to, then be warming up to 1025 DEG C, soaking time 1min/mm, then
Oil-temper is carried out out at 130 DEG C.Oil is cold to be calculated as 1h/100mm；
S3 tempering: in-furnace temperature is 525 DEG C, and soaking time 3min/mm comes out of the stove air-cooled, then repeats back
Fire processing.
Embodiment 4
The preparation method of 1.2316 pre- hard hardening plastic mold steels is present embodiments provided, S1 soft annealing: by 550 DEG C
In-furnace temperature is heated to 770 DEG C and is kept the temperature, soaking time 3min/mm, be cooled to 500 DEG C come out of the stove it is air-cooled；
Quench after S2 stepwise heating: the in-furnace temperature mode of clicking before quenching heats up: in-furnace temperature is warming up to
390 DEG C, then 650 DEG C are warming up to, 840-860 DEG C is then heated to, then be warming up to 1030 DEG C, soaking time 1min/mm, then
Oil-temper is carried out out at 135 DEG C.Oil is cold to be calculated as 1h/100mm；
S3 tempering: in-furnace temperature is 530 DEG C, and soaking time 3min/mm comes out of the stove air-cooled, then repeats back
Fire processing.
Embodiment 5
The preparation method of 1.2316 pre- hard hardening plastic mold steels is present embodiments provided, S1 soft annealing: by 550 DEG C
In-furnace temperature is heated to 775 DEG C and is kept the temperature, soaking time 3min/mm, be cooled to 500 DEG C come out of the stove it is air-cooled；
Quench after S2 stepwise heating: the in-furnace temperature mode of clicking before quenching heats up: in-furnace temperature is warming up to
395 DEG C, then 655 DEG C are warming up to, 855 DEG C are then heated to, then be warming up to 1035 DEG C, then soaking time 1min/mm exists
Oil-temper is carried out out at 140 DEG C.Oil is cold to be calculated as 1h/100mm；
S3 tempering: in-furnace temperature is 5350 DEG C, and soaking time 3min/mm comes out of the stove air-cooled, then repeats back
Fire processing.
Embodiment 6
The preparation method of 1.2316 pre- hard hardening plastic mold steels is present embodiments provided, S1 soft annealing: by 550 DEG C
In-furnace temperature is heated to 760 DEG C and is kept the temperature, soaking time 3min/mm, be cooled to 500 DEG C come out of the stove it is air-cooled；
Quench after S2 stepwise heating: the in-furnace temperature mode of clicking before quenching heats up: in-furnace temperature is warming up to
340 DEG C, then 640 DEG C are warming up to, 860 DEG C are then heated to, then be warming up to 1040 DEG C, then soaking time 1min/mm exists
Oil-temper is carried out out at 145 DEG C.Oil is cold to be calculated as 1h/100mm；
S3 tempering: in-furnace temperature is 520 DEG C, and soaking time 3min/mm comes out of the stove air-cooled, then repeats back
Fire processing.
Following effect may be implemented using the preparation method of provided by the invention 1.2316 pre- hard hardening plastic mold steels:
The preparation method of 1.2316 pre- hard hardening plastic mold steel provided in an embodiment of the present invention, by reducing soft annealing
Temperature prevents crystal grain from growing up；Stepwise heating is used before quenching, under the premise of guaranteeing that alloy is fully dissolved in austenite, is obtained uniformly
Austenite structure；It is quenched it is pre- it is hard after, carrying out a tempering, generating additional stress when eliminating retained austenite tempering.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc. should all include.
Claims (6)
1. a kind of 1.2316 pre- hard hardening plastic mold steel preparation methods characterized by comprising by described 1.2316 pre- vigours
Matter plastic die steel quenches after successively carrying out soft annealing, stepwise heating and tempering, and its step are as follows:
S1 soft annealing: being heated to 760-780 DEG C for 550 DEG C of in-furnace temperature and keep the temperature, soaking time 3min/mm, drop
Temperature is come out of the stove to 500 DEG C；
Quench after S2 stepwise heating: the in-furnace temperature mode of clicking before quenching heats up: in-furnace temperature is warming up to T1 temperature
Degree, then it is warming up to T2 temperature, then heat to T3 temperature；
S3 tempering: in-furnace temperature is 520-540 DEG C, soaking time 3min/mm, is come out of the stove air-cooled, then repeats described return
Fire processing.
2. 1.2316 pre- hard hardening plastic mold steel preparation method according to claim 1, which is characterized in that the step
T1 temperature after S2 stepwise heating in quenching is 380-400 DEG C, and T2 temperature is 640-660 DEG C, and T3 is 840-860 DEG C.
3. 1.2316 pre- hard hardening plastic mold steel preparation method according to claim 2, which is characterized in that the step
The soaking time of T1, T2 and T3 after S2 stepwise heating in quenching are 0.5min/mm.
4. 1.2316 pre- hard hardening plastic mold steel preparation method according to claim 1, which is characterized in that the step
After S2 stepwise heating in quenching, it is warming up to 1020-1040 DEG C again after being warming up to T3 temperature, then soaking time 1min/mm exists
Oil-temper is carried out out at 120-150 DEG C, oil is cold to be calculated as 1h/100mm.
5. 1.2316 pre- hard hardening plastic mold steel preparation method according to claim 1, which is characterized in that the step
Further include smelting before S1 soft annealing, specific steps are followed successively by EAF(electric furnace and slightly refine), LF(ladle refining), VD(vacuum outgas),
And casting.
6. a kind of 1.2316 pre- hard hardening plastic mold steels, by the pre- vigour of the claim 1-5 described in any item 1.2316
Matter plastic die steel preparation method is made.
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| CN114669699A (en) * | 2022-03-23 | 2022-06-28 | 北京少仕科技有限公司 | Torsion shaft manufacturing method |
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| 无: "1.2316 塑料模具钢", 《热处理技术与装备》 * |
| 陈洁等编著: "《民用飞机热表特种工艺技术》", 31 December 2016, 上海交通大学出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111187968A (en) * | 2020-02-13 | 2020-05-22 | 江油市长祥特殊钢制造有限公司 | Preparation method of 1.2367 hot-working extrusion die steel |
| CN114669699A (en) * | 2022-03-23 | 2022-06-28 | 北京少仕科技有限公司 | Torsion shaft manufacturing method |
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