CN106498132A - High-pressure gas quenching process for die - Google Patents
High-pressure gas quenching process for die Download PDFInfo
- Publication number
- CN106498132A CN106498132A CN201611052394.0A CN201611052394A CN106498132A CN 106498132 A CN106498132 A CN 106498132A CN 201611052394 A CN201611052394 A CN 201611052394A CN 106498132 A CN106498132 A CN 106498132A
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- Prior art keywords
- air quenching
- quenching
- gas
- room
- air
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Classifications
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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
-
- 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
- C21D1/62—Quenching devices
- C21D1/667—Quenching devices for spray quenching
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0062—Heat-treating apparatus with a cooling or quenching zone
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The invention relates to a high-pressure gas quenching process for a die, and relates to the technical field of quenching. The high-pressure gas quenching process adopts a staged cooling process, so that no new defect is formed in the process of ending gas quenching, and the process is carried out in a high-pressure gas quenching furnace. The gas quenching chamber of the high-pressure gas quenching furnace is a spherical cavity formed by the shell, a plurality of nozzles used for introducing gas media into the gas quenching chamber are arranged in the gas quenching chamber, the nozzles are uniformly distributed in the gas quenching chamber of the spherical cavity along the circumferential direction, and meanwhile, the workpiece support is placed near the nozzles, so that the gas media entering the gas quenching chamber can contact workpieces to be processed under the conditions of the highest flow rate and the highest gas pressure, the gas media can play the largest gas quenching effect, and the purposes of shortening the gas quenching time and reducing the energy consumption are achieved.
Description
Technical field
The present invention relates to a kind of mould high pressure gas quenching technique, is related to quenching technology field.
Background technology
Quenching, is metal works to be heated to a certain proper temperature and is kept for a period of time, immediately in immersion quenching media
The metal heating processing technology of quick cooling.Conventional quenching media has saline, water, mineral oil, air etc..Quenching can improve gold
The hardness and wearability of metal work-pieces, thus be widely used in various works, mould, measurer and require that the part of surface abrasion resistance (such as gear, rolls
Roller, carburized parts etc.).
Quenching technical is mainly used in steel part.Conventional steel when being heated to more than critical temperature, original group at room temperature
Knit and whole or big portion is changed into austenite.Subsequently steel is immersed and is quickly cooled down in water or oil, austenite is changed into martensite.
According to cooling means, quenching technical is divided into single-stage quenching, interrupted quenching, martempering and austempering 4
Class.
" air quenching ", is the technique quenched as hardening media using gas, and this kind of quenching technical can be according to workpiece shape
The requirement adjustment quenching process of state and material, is particularly suited for the Quenching Treatment of the workpiece with labyrinth.But, due to gas
Body is all little compared with the heat conductivity of liquid medium, and therefore, the cost of air quenching is of a relatively high.Meanwhile, at the end of air quenching is carried out, its
Temperature directly drops to temperature from operating temperature, and the temperature difference is larger, easily forms workpiece, defect.
Content of the invention
It is an object of the invention to provide a kind of mould high pressure gas quenching technique, to solve above-mentioned technical problem.
Mould high pressure gas quenching technique, the air quenching technique are carried out in high-pressure gas quenching furnace, and the condition of the air quenching technique is：
Air quenching office work 0.2～1MPa of pressure, works 20～40min of total time, and gas medium is nitrogen, hydrogen, helium
At least one in gas,
850 DEG C～1200 DEG C of initial operating temperature, when air quenching carry out to work total time 1/2 when, reduce in air quenching room
Temperature to 420 DEG C～600 DEG C, be incubated 1～5min；At the uniform velocity the temperature in air quenching room is reduced within the remaining working time
60 DEG C～120 DEG C.
Further, the air quenching technique is carried out in high-pressure gas quenching furnace, and the condition of the air quenching technique is：In air quenching room
0.5～0.7MPa of operating pressure, works 30～40min of total time,
850 DEG C～1100 DEG C of initial operating temperature, when air quenching carry out to work total time 1/2 when, reduce in air quenching room
Temperature to 420 DEG C～500 DEG C, be incubated 3～5min；At the uniform velocity the temperature in air quenching room is reduced within the remaining working time
60 DEG C～120 DEG C.
Further, the gas medium is hydrogen and nitrogen by volume 1:The gaseous mixture of 1～1.8 composition.
Further, high pressure gas quenching technique of the present invention is carried out in high-pressure gas quenching furnace.
A kind of high-pressure gas quenching furnace, the air-quenching furnace include air quenching room, and the air quenching room is the spherical cavity that housing is formed,
Be provided with some nozzles for gas medium is passed through into air quenching room in the air quenching room, the nozzle is in spherical cavity
Bromhidrosis quench interior distribution as follows：
8 nozzles are circumferentially placed equidistant at maximum cross-section of the spherical cavity parallel to ground, attached in 8 nozzles
Liftable sub- work rest is closely provided with；
4 sprays are circumferentially placed equidistant at section of the area parallel to ground for the 1/4 of maximum cross-section area
Mouth；
On the summit of the spherical cavity, 1 nozzle is set；
Liftable main work rest is provided with the center of the spherical cavity.
The position of sub- work rest of the present invention is arranged near nozzle, while the work rest liftable, the root when using
The position of work rest is adjusted according to the size of pending workpiece so that the gas medium entered from nozzle can sufficiently act on work
On part.
The inner wall surface of the preferably described housing of high-pressure gas quenching furnace of the present invention is carbon fibre composite surface.
The preferably described nozzle of high-pressure gas quenching furnace of the present invention is graphite nozzle.Further, the nozzle has independent
On-off control.
High-pressure gas quenching furnace of the present invention is preferably provided with agitator in the bottom of spherical cavity.
Above-mentioned high-pressure gas quenching furnace is based on, a preferred technical scheme of the invention is：
Pending workpiece is placed on main work rest (103), is opened all nozzle (101), control air quenching office work pressure
0.2～1MPa of power.
Above-mentioned high-pressure gas quenching furnace is based on, presently preferred technical scheme is：
Pending workpiece is placed on sub- work rest (102), spherical cavity is opened and is justified parallel at the maximum cross-section on ground
8 nozzles (101) on week, control air quenching office work 0.2～1MPa of pressure.
Beneficial effects of the present invention are：High pressure gas quenching technique of the present invention adopts stage temperature reduction technology, it is ensured that
During air quenching closes to an end, new defect is not formed, meanwhile, the present invention is carried out in high-pressure gas quenching furnace, the high pressure gas
Quench stove air quenching room be housing formed spherical cavity, be provided with the air quenching room some for be passed through into air quenching room gas Jie
The nozzle of matter, the nozzle are distributed uniformly and circumferentially in spherical cavity air quenching room, while being placed around work in nozzle
Part frame so that the gas medium for entering air quenching room can contact pending workpiece in the case of peak flow rate (PFR) and highest air pressure,
And then make gas medium play maximum air quenching effect, the shortening air quenching time is reached, reduces the purpose of energy consumption.Meanwhile, spherical
The centre of cavity arranges main work rest, can be used to process large volume of workpiece；Can open when using main work rest
The agitator of bottom, optimizes gas flow rate.
Description of the drawings
Fig. 1 be air quenching room spherical cavity parallel to the schematic diagram at the maximum cross-section on ground；
Fig. 2 is air quenching room spherical cavity side view；
Fig. 3 is the sectional view in Fig. 2 at A-A,
Reference is as follows：1 air quenching room, 2 housings, 101 nozzles, 102 sub- work rests, 103 main work rests.
Specific embodiment
Following non-limiting examples can make one of ordinary skill in the art be more fully understood the present invention, but not with
Any mode limits the present invention.
Test method described in following embodiments, if no special instructions, is conventional method；The reagent and material, such as
Without specified otherwise, commercially obtain.
High-pressure gas quenching furnace used by following enforcements has following structures：
A kind of high-pressure gas quenching furnace, the air-quenching furnace include air quenching room 1, and the air quenching room 1 is the spherical cavity that housing 2 is formed
Body,
Be provided with some nozzles 101 for gas medium is passed through into air quenching room 1, the nozzle 101 in the air quenching room 1
Distribution in spherical cavity air quenching room 1 is as follows：
8 nozzles 101 are circumferentially placed equidistant at maximum cross-section of the spherical cavity parallel to ground, are sprayed at 8
Mouth 101 is nearby provided with liftable sub- work rest 102；
4 sprays are circumferentially placed equidistant at section of the area parallel to ground for the 1/4 of maximum cross-section area
Mouth 101；
On the summit of the spherical cavity, 1 nozzle 101 is set；The nozzle 101 has independent on-off control.
Liftable main work rest 103 is provided with the center of the spherical cavity.It is provided with the bottom of spherical cavity and stirs
Mix device.
The inner wall surface of the housing 2 is carbon fibre composite surface.The nozzle 101 is graphite nozzle.
Embodiment 1
Mould high pressure gas quenching technique, the air quenching technique are carried out in high-pressure gas quenching furnace, and the condition of the air quenching technique is：
Workpiece is GCr15 steel molds, and GCr15 steel molds are placed on main work rest 103, opens all nozzles 101, and air quenching medium is height
Pure nitrogen gas,
Air quenching office work pressure 0.7MPa, work total time 30min, 850 DEG C of initial operating temperature, when air quenching carry out to
Work total time 1/2 when, reduce the temperature in air quenching room to 420 DEG C, be incubated 5min；At the uniform velocity will within the remaining working time
Temperature in air quenching room is reduced to 65 DEG C.
Steel part hardness after process is improved, and free of surface defects.
Embodiment 2
Mould high pressure gas quenching technique, the air quenching technique are carried out in high-pressure gas quenching furnace, and the condition of the air quenching technique is：
Workpiece be 3Cr2W8 steel molds, 3Cr2W8 steel molds are placed on sub- work rest 102, open spherical cavity parallel to ground most
8 nozzles 101 at heavy in section on circumference, air quenching medium are that hydrogen and nitrogen press 1:The gaseous mixture of 1.8 compositions,
Air quenching office work pressure 0.5MPa, work total time 30min, 950 DEG C of initial operating temperature, when air quenching carry out to
Work total time 1/2 when, reduce the temperature in air quenching room to 470 DEG C, be incubated 3min；At the uniform velocity will within the remaining working time
Temperature in air quenching room is reduced to 90 DEG C.
Steel part hardness after process is improved, and free of surface defects.
Claims (6)
1. mould high pressure gas quenching technique, it is characterised in that：The air quenching technique is carried out in high-pressure gas quenching furnace, the air quenching technique
Condition be：
Air quenching office work 0.2～1MPa of pressure, works 20～40min of total time, and gas medium is nitrogen, hydrogen, in helium
At least one,
850 DEG C～1200 DEG C of initial operating temperature, when air quenching carry out to work total time 1/2 when, reduce the temperature in air quenching room
Spend to 420 DEG C～600 DEG C, be incubated 1～5min；The temperature in air quenching room is reduced to 60 DEG C at the uniform velocity within the remaining working time
～120 DEG C.
2. technique according to claim 1, it is characterised in that：The air quenching technique is carried out in high-pressure gas quenching furnace, described
The condition of air quenching technique is：
Air quenching office work 0.5～0.7MPa of pressure, works 30～40min of total time,
850 DEG C～1100 DEG C of initial operating temperature, when air quenching carry out to work total time 1/2 when, reduce the temperature in air quenching room
Spend to 420 DEG C～500 DEG C, be incubated 3～5min；The temperature in air quenching room is reduced to 60 DEG C at the uniform velocity within the remaining working time
～120 DEG C.
3. technique according to claim 1, it is characterised in that：The gas medium is hydrogen and nitrogen by volume 1:1
The gaseous mixture of～1.8 compositions.
4. technique according to claim 1, it is characterised in that：High-pressure gas quenching furnace includes air quenching room (1), the air quenching room
(1) spherical cavity formed for housing (2),
Be provided with some nozzles (101) for gas medium is passed through into air quenching room (1), the nozzle in air quenching room (1)
(101) distribution in the spherical cavity air quenching room (1) is as follows：
8 nozzles (101) are circumferentially placed equidistant at maximum cross-section of the spherical cavity parallel to ground, in 8 nozzles
(101) liftable sub- work rest (102) are provided with nearby；
4 nozzles are circumferentially placed equidistant at section of the area parallel to ground for the 1/4 of maximum cross-section area
(101)；
On the summit of the spherical cavity, 1 nozzle (101) is set；
Liftable main work rest (103) are provided with the center of the spherical cavity.
5. technique according to claim 4, it is characterised in that：Pending workpiece is placed on main work rest (103), is opened
All nozzle (101), control air quenching office work 0.2～1MPa of pressure.
6. technique according to claim 4, it is characterised in that：Pending workpiece is placed on sub- work rest (102), is opened
Spherical cavity parallel to 8 nozzles (101) on circumference at the maximum cross-section on ground, control air quenching office work pressure 0.2～
1MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611052394.0A CN106498132B (en) | 2016-11-24 | 2016-11-24 | High-pressure gas quenching process for die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611052394.0A CN106498132B (en) | 2016-11-24 | 2016-11-24 | High-pressure gas quenching process for die |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106498132A true CN106498132A (en) | 2017-03-15 |
| CN106498132B CN106498132B (en) | 2018-09-25 |
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ID=58328478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611052394.0A Active CN106498132B (en) | 2016-11-24 | 2016-11-24 | High-pressure gas quenching process for die |
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| Country | Link |
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| CN (1) | CN106498132B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107937698A (en) * | 2017-12-25 | 2018-04-20 | 合肥南方汽车零部件有限公司 | A kind of heat treatment process of 45 steel molds of metal casting |
| CN111745030A (en) * | 2020-06-30 | 2020-10-09 | 北京航星机器制造有限公司 | Gas-expansion gas-quenching forming die and method for reinforced aluminum alloy near-conical thin-wall part |
Citations (4)
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|---|---|---|---|---|
| US20050104266A1 (en) * | 2003-11-13 | 2005-05-19 | Iq Technologies, Inc. | Vacuum furnace with pressurized intensive water quench tank |
| CN102102139A (en) * | 2011-03-23 | 2011-06-22 | 马鞍山钢铁股份有限公司 | Wheel quenching device |
| CN103103326A (en) * | 2011-11-15 | 2013-05-15 | 昆山鑫昌泰模具科技有限公司 | Vacuum isothermal treatment technology for hot work die steel |
| CN103192084A (en) * | 2013-05-05 | 2013-07-10 | 沈阳中北真空磁电科技有限公司 | Rotary vacuum heat treatment equipment |
-
2016
- 2016-11-24 CN CN201611052394.0A patent/CN106498132B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050104266A1 (en) * | 2003-11-13 | 2005-05-19 | Iq Technologies, Inc. | Vacuum furnace with pressurized intensive water quench tank |
| CN102102139A (en) * | 2011-03-23 | 2011-06-22 | 马鞍山钢铁股份有限公司 | Wheel quenching device |
| CN103103326A (en) * | 2011-11-15 | 2013-05-15 | 昆山鑫昌泰模具科技有限公司 | Vacuum isothermal treatment technology for hot work die steel |
| CN103192084A (en) * | 2013-05-05 | 2013-07-10 | 沈阳中北真空磁电科技有限公司 | Rotary vacuum heat treatment equipment |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107937698A (en) * | 2017-12-25 | 2018-04-20 | 合肥南方汽车零部件有限公司 | A kind of heat treatment process of 45 steel molds of metal casting |
| CN107937698B (en) * | 2017-12-25 | 2019-02-01 | 合肥南方汽车零部件有限公司 | A kind of heat treatment process of 45 steel molds of metal casting |
| CN111745030A (en) * | 2020-06-30 | 2020-10-09 | 北京航星机器制造有限公司 | Gas-expansion gas-quenching forming die and method for reinforced aluminum alloy near-conical thin-wall part |
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| Publication number | Publication date |
|---|---|
| CN106498132B (en) | 2018-09-25 |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220517 Address after: 034000 guanguanying Industrial Park, Dingxiang County, Xinzhou City, Shanxi Province Patentee after: SHANXI GUANJIAYING FLANGE FORGING GROUP CO.,LTD. Address before: 116000 floor 1-6, No. 92, Tieshan East Road, Jinzhou new district, Dalian, Liaoning Province Patentee before: DALIAN SHENGJIE HEAT TREATMENT TECHNOLOGY DEVELOPMENT Co.,Ltd. |
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| CP03 | Change of name, title or address |
Address after: 035404 Guanjiaying Industrial Park, Shenshan Township, Dingxiang County, Xinzhou, Shanxi Province Patentee after: Shanxi Guanjiaying Flange Forging Co.,Ltd. Address before: 034000 guanguanying Industrial Park, Dingxiang County, Xinzhou City, Shanxi Province Patentee before: SHANXI GUANJIAYING FLANGE FORGING GROUP CO.,LTD. |
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