CN108823524A - A kind of vacuum heat-treating method of mould steel - Google Patents
A kind of vacuum heat-treating method of mould steel Download PDFInfo
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- CN108823524A CN108823524A CN201810814075.1A CN201810814075A CN108823524A CN 108823524 A CN108823524 A CN 108823524A CN 201810814075 A CN201810814075 A CN 201810814075A CN 108823524 A CN108823524 A CN 108823524A
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- temperature
- vacuum heat
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- 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
- C23C8/34—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 more than one element being applied in more than one step
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The present invention relates to a kind of vacuum heat-treating methods of mould steel, include the following steps：1, mold is placed and carries out the pre-heat treatment in vacuum heat treatment furnace and keeps the temperature；2, it is passed through methane in vacuum heat treatment furnace, and promotes the temperature of vacuum heat treatment furnace, first time Carburization Treatment is carried out to mold；3, temperature and the heat preservation of vacuum heat treatment furnace are reduced；4, it is passed through methane in vacuum heat treatment furnace, and promotes the temperature of vacuum heat treatment furnace, second of Carburization Treatment is carried out to mold；5, it reduces the temperature in vacuum furnace and is passed through ammonia in a vacuum furnace and carry out Nitrizing Treatment；6, the mold in above-mentioned steps is quenched；7, the mold in above-mentioned steps is subjected to tempering.The present invention makes mold have good wearability, hardness, tensile strength and yield strength.
Description
Technical field
The invention belongs to vacuum heat treatment technology fields, and in particular to a kind of vacuum heat-treating method of mould steel.
Background technique
Vacuum heat treatment is the novel thermal process technology that vacuum technique is combined with heat treatment technics, locating for vacuum heat treatment
Vacuum environment refer to the atmosphere lower than an atmospheric pressure, including low vacuum, medium vacuum, high vacuum and superelevation are true
Sky, vacuum heat treatment is practical to also belong to control climate heat treatment.Mold is exactly in industrial production to be molded, be blow molded, squeeze out, cast
It makes, form, smelting, punching press, the methods of stretching obtain the various moulds and tool of required product.Cold punching die is mostly to be mounted on
On press machine, deformation force is applied to the plate in being placed at room temperature, is deformed it, so that certain shapes is obtained,
The special specific purpose tool of the product parts of size and performance.In order to improve the wearability, hardness and corrosion resistance of mold working surface,
It needs to be heat-treated stamping die.
Summary of the invention
The object of the invention is that providing a kind of vacuum heat-treating method of mould steel to solve the above-mentioned problems, make
Mold has good wearability, hardness, tensile strength and yield strength.
The present invention is achieved through the following technical solutions above-mentioned purpose：
A kind of vacuum heat-treating method of mould steel, includes the following steps：
Step 1：Mold is placed and carries out the pre-heat treatment in vacuum heat treatment furnace and keeps the temperature；
Step 2：It is passed through methane in vacuum heat treatment furnace, and promotes the temperature of vacuum heat treatment furnace, the is carried out to mold
Carburization Treatment；
Step 3：Reduce the temperature of vacuum heat treatment furnace and heat preservation；
Step 4：It is passed through methane in vacuum heat treatment furnace, and promotes the temperature of vacuum heat treatment furnace, the is carried out to mold
Secondary Carburization Treatment；
Step 5：It reduces the temperature in vacuum furnace and is passed through ammonia in a vacuum furnace and carry out Nitrizing Treatment；
Step 6：Mold in above-mentioned steps is quenched；
Step 7：Mold in above-mentioned steps is subjected to tempering.
As the scheme that the present invention advanced optimizes, the temperature preheated in step 1 is 400-500 DEG C, and soaking time is
30min-90min, carrying out the pre-heat treatment to mold reduces rejection rate.
As the scheme that the present invention advanced optimizes, the temperature of first time Carburization Treatment is 800-900 DEG C in step 2.
As the scheme that the present invention advanced optimizes, the temperature after temperature reduces in vacuum drying oven in step 3 is 400-500
DEG C, soaking time 20min-30min, reducing temperature keeps carburized layer more stable.
As the scheme that the present invention advanced optimizes, the temperature of second of Carburization Treatment is 850-950 DEG C in step 3, the
The temperature of secondary carburizing be higher than first time carburizing temperature, convenient for carbon can carburizing into original carburized layer.
As the scheme that the present invention advanced optimizes, the temperature of Nitrizing Treatment is 300-400 DEG C in step 4.
As the scheme that the present invention advanced optimizes, 30-50 DEG C is cooled to using oil after being quenched in step 6.
As the scheme that the present invention advanced optimizes, the number being tempered in step 7 is 2-3 times.
The beneficial effects of the present invention are：
The present invention to mold carry out twice Carburization Treatment keep carburizing effect more preferable, carburized layer with a thickness of 0.1-0.2mm, and
The phosphorus content of carburized layer is gradually reduced from appearance to internal layer, and the hardness for increasing die surface increases its wearability；Present invention processing
Die surface hardness and wearability, while there is preferable tensile strength and yield strength, and rejection rate is low.
Specific embodiment
The application is described in further detail below, it is necessary to which indicated herein to be, following specific embodiments are only used
It is further detailed in the application, should not be understood as the limitation to the application protection scope, person skilled in art
Some nonessential modifications and adaptations can be made to the application according to above-mentioned application content.
Embodiment one
Mold is made of using 304 steel, and vacuum heat-treating method includes the following steps：
Step 1：Mold to be placed and carries out the pre-heat treatment in vacuum heat treatment furnace and keeps the temperature, the temperature of preheating is 400 DEG C,
Soaking time is 30min；
Step 2：It is passed through methane in vacuum heat treatment furnace, and promotes the temperature of vacuum heat treatment furnace, the is carried out to mold
Carburization Treatment, the temperature of Carburization Treatment are 800 DEG C；
Step 3：The temperature of vacuum heat treatment furnace and heat preservation are reduced, the temperature after temperature reduces in vacuum drying oven is 400 DEG C,
Soaking time is 20min；
Step 4：It is passed through methane in vacuum heat treatment furnace, and promotes the temperature of vacuum heat treatment furnace, the is carried out to mold
Secondary Carburization Treatment, the temperature of second of Carburization Treatment are 850 DEG C；
Step 5：It reduces the temperature in vacuum furnace and is passed through ammonia in a vacuum furnace and carry out Nitrizing Treatment, the temperature of Nitrizing Treatment
Degree is 300 DEG C；
Step 6：Mold in above-mentioned steps is quenched, is cooled to 30 DEG C using oil after quenching treatment；
Step 7：Mold in above-mentioned steps is subjected to 2 temperings.
Some parameters of the mold measured after heat treatment are：Tensile strength is 930MPa, yield strength 900MPa, surface
Hardness is 310HB.
Embodiment two
Mold is made of using 304 steel, and vacuum heat-treating method includes the following steps：
Step 1：Mold to be placed and carries out the pre-heat treatment in vacuum heat treatment furnace and keeps the temperature, the temperature of preheating is 450 DEG C,
Soaking time is 60min；
Step 2：It is passed through methane in vacuum heat treatment furnace, and promotes the temperature of vacuum heat treatment furnace, the is carried out to mold
Carburization Treatment, the temperature of Carburization Treatment are 850 DEG C；
Step 3：The temperature of vacuum heat treatment furnace and heat preservation are reduced, the temperature after temperature reduces in vacuum drying oven is 450 DEG C,
Soaking time is 25min；
Step 4：It is passed through methane in vacuum heat treatment furnace, and promotes the temperature of vacuum heat treatment furnace, the is carried out to mold
Secondary Carburization Treatment, the temperature of second of Carburization Treatment are 900 DEG C；
Step 5：It reduces the temperature in vacuum furnace and is passed through ammonia in a vacuum furnace and carry out Nitrizing Treatment, the temperature of Nitrizing Treatment
Degree is 350 DEG C；
Step 6：Mold in above-mentioned steps is quenched, is cooled to 40 DEG C using oil after quenching treatment；
Step 7：Mold in above-mentioned steps is subjected to 2 temperings.
Some parameters of the mold measured after heat treatment are：Tensile strength is 925MPa, yield strength 910MPa, surface
Hardness is 320HB.
Embodiment three
Mold is made of using 304 steel, and vacuum heat-treating method includes the following steps：
Step 1：Mold to be placed and carries out the pre-heat treatment in vacuum heat treatment furnace and keeps the temperature, the temperature of preheating is 500 DEG C,
Soaking time is 90min；
Step 2：It is passed through methane in vacuum heat treatment furnace, and promotes the temperature of vacuum heat treatment furnace, the is carried out to mold
Carburization Treatment, the temperature of Carburization Treatment are 900 DEG C；
Step 3：The temperature of vacuum heat treatment furnace and heat preservation are reduced, the temperature after temperature reduces in vacuum drying oven is 500 DEG C,
Soaking time is 30min；
Step 4：It is passed through methane in vacuum heat treatment furnace, and promotes the temperature of vacuum heat treatment furnace, the is carried out to mold
Secondary Carburization Treatment, the temperature of second of Carburization Treatment are 950 DEG C；
Step 5：It reduces the temperature in vacuum furnace and is passed through ammonia in a vacuum furnace and carry out Nitrizing Treatment, the temperature of Nitrizing Treatment
Degree is 400 DEG C；
Step 6：Mold in above-mentioned steps is quenched, is cooled to 50 DEG C using oil after quenching treatment；
Step 7：Mold in above-mentioned steps is subjected to 3 temperings.
Some parameters of the mold measured after heat treatment are：Tensile strength is 935MPa, yield strength 890MPa, surface
Hardness is 325HB.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.
Claims (8)
1. a kind of vacuum heat-treating method of mould steel, which is characterized in that include the following steps：
Step 1：Mold is placed and carries out the pre-heat treatment in vacuum heat treatment furnace and keeps the temperature；
Step 2：It is passed through methane in vacuum heat treatment furnace, and promotes the temperature of vacuum heat treatment furnace, mold is carried out for the first time
Carburization Treatment；
Step 3：Reduce the temperature of vacuum heat treatment furnace and heat preservation；
Step 4：It is passed through methane in vacuum heat treatment furnace, and promotes the temperature of vacuum heat treatment furnace, mold is carried out second
Carburization Treatment；
Step 5：It reduces the temperature in vacuum furnace and is passed through ammonia in a vacuum furnace and carry out Nitrizing Treatment；
Step 6：Mold in above-mentioned steps is quenched；
Step 7：Mold in above-mentioned steps is subjected to tempering.
2. a kind of vacuum heat-treating method of mould steel according to claim 1, it is characterised in that：It is preheated in step 1
Temperature is 400-500 DEG C, soaking time 30min-90min.
3. a kind of vacuum heat-treating method of mould steel according to claim 1, it is characterised in that：In step 2 for the first time
The temperature of Carburization Treatment is 800-900 DEG C.
4. a kind of vacuum heat-treating method of mould steel according to claim 1, it is characterised in that：Vacuum drying oven in step 3
Temperature after middle temperature reduces is 400-500 DEG C, soaking time 20min-30min.
5. a kind of vacuum heat-treating method of mould steel according to claim 1, it is characterised in that：Second in step 3
The temperature of Carburization Treatment is 850-950 DEG C.
6. a kind of vacuum heat-treating method of mould steel according to claim 1, it is characterised in that：In step 4 at nitriding
The temperature of reason is 300-400 DEG C.
7. a kind of vacuum heat-treating method of mould steel according to claim 1, it is characterised in that：In step 6 at quenching
30-50 DEG C is cooled to using oil after reason.
8. a kind of vacuum heat-treating method of mould steel according to claim 1, it is characterised in that：It is tempered in step 7
Number is 2-3 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810814075.1A CN108823524A (en) | 2018-07-23 | 2018-07-23 | A kind of vacuum heat-treating method of mould steel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810814075.1A CN108823524A (en) | 2018-07-23 | 2018-07-23 | A kind of vacuum heat-treating method of mould steel |
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| CN108823524A true CN108823524A (en) | 2018-11-16 |
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| CN201810814075.1A Pending CN108823524A (en) | 2018-07-23 | 2018-07-23 | A kind of vacuum heat-treating method of mould steel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109702442A (en) * | 2019-03-11 | 2019-05-03 | 精利模塑科技（无锡）有限公司 | A kind of production method of precision rapid shaping auto electronics mold |
| RU2794272C1 (en) * | 2021-11-11 | 2023-04-13 | Федеральное Государственное Унитарное Предприятие "Центральный научно-исследовательский институт черной металлургии им. И.П. Бардина" (ФГУП "ЦНИИчермет им. И.П. Бардина") | METHOD FOR GAS, LOW-TEMPERATURE NITROCARBURISING OF TOOLS MADE OF HIGH-CHROMIUM DIE STEELS (SATURATION LAYERS FROM 0.08 TO 0.15 mm) WITH A MINIMAL CARBONITRIDE HIGH-NITROGEN SURFACE LAYER IN VACUUM FURNACES |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101994118A (en) * | 2009-08-11 | 2011-03-30 | 顾安民 | Heat treatment method for steel pieces |
| CN104439999A (en) * | 2014-11-05 | 2015-03-25 | 芜湖金龙模具锻造有限责任公司 | Manufacturing method of highly wear-resisting hammer upper die forging upper die |
| CN106086769A (en) * | 2016-06-20 | 2016-11-09 | 南通三荣实业有限公司 | A kind of Carburization Treatment method |
-
2018
- 2018-07-23 CN CN201810814075.1A patent/CN108823524A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101994118A (en) * | 2009-08-11 | 2011-03-30 | 顾安民 | Heat treatment method for steel pieces |
| CN104439999A (en) * | 2014-11-05 | 2015-03-25 | 芜湖金龙模具锻造有限责任公司 | Manufacturing method of highly wear-resisting hammer upper die forging upper die |
| CN106086769A (en) * | 2016-06-20 | 2016-11-09 | 南通三荣实业有限公司 | A kind of Carburization Treatment method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109702442A (en) * | 2019-03-11 | 2019-05-03 | 精利模塑科技（无锡）有限公司 | A kind of production method of precision rapid shaping auto electronics mold |
| RU2794272C1 (en) * | 2021-11-11 | 2023-04-13 | Федеральное Государственное Унитарное Предприятие "Центральный научно-исследовательский институт черной металлургии им. И.П. Бардина" (ФГУП "ЦНИИчермет им. И.П. Бардина") | METHOD FOR GAS, LOW-TEMPERATURE NITROCARBURISING OF TOOLS MADE OF HIGH-CHROMIUM DIE STEELS (SATURATION LAYERS FROM 0.08 TO 0.15 mm) WITH A MINIMAL CARBONITRIDE HIGH-NITROGEN SURFACE LAYER IN VACUUM FURNACES |
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Application publication date: 20181116 |
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