CN106399651A - Integral vacuum quenching process for thin-wall large-diameter mould - Google Patents
Integral vacuum quenching process for thin-wall large-diameter mould Download PDFInfo
- Publication number
- CN106399651A CN106399651A CN201611110313.8A CN201611110313A CN106399651A CN 106399651 A CN106399651 A CN 106399651A CN 201611110313 A CN201611110313 A CN 201611110313A CN 106399651 A CN106399651 A CN 106399651A
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- CN
- China
- Prior art keywords
- mould
- cover body
- thin
- vacuum
- diameter
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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
- C21D1/62—Quenching devices
-
- 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
- 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
Abstract
The invention relates to an integral vacuum quenching process for a thin-wall large-diameter mould. The integral vacuum quenching process comprises the following steps: 1, vertically putting the mould onto a tray, wherein a plurality of first through holes are uniformly formed in the tray; 2, covering a cover body over the mould for accommodating the mould in a cavity enclosed by the cover body and the tray, wherein the cover body is in the shape of barrel, the cover body consists of side surfaces and a top surface, a gap being 25-30 mm is formed between the cover body and the mould, a second through hole is formed in the center of the top surface of the cover body, the diameter of the second through hole is pore diameter +/-10 mm of the mould, a plurality of vent holes are uniformly formed in the side surfaces and the top surface of the cover body, and the hole diameter of the vent holes is 5-6 mm; and 3, carrying out vacuum quenching on the mould along with the tray and the cover body. The integral vacuum quenching process can effectively reduce mould deformation, increases a yield, accurately controls the diameter of the outer circle of the quenched mould as well as dimensions and shapes of patterns of an outer circular surface of the quenched mould, saves materials, reduces follow-up processing allowance, does not need to trim the dimensions and the shapes of the patterns after quenching, and reduces processing cost.
Description
Technical field
The present invention relates to technical field of heat treatment, specifically a kind of thin-walled major diameter mould overall vacuum quenching technical.
Background technology
Diameter >=300mm, the thin-walled major diameter mould of wall thickness 20mm～30mm, because its diameter is big, wall thickness is thin, using whole
When body vacuum hardening technique carries out heat treatment to it, there is deformation of products greatly, percent defective is high, be difficult to accurately control the mould after quenching
The defect of tool outside diameter and outer round surface decorative pattern size and dimension, it is necessary to increase following process surplus, also needs to after quenching
Decorative pattern size and dimension is repaired, leads to waste of material, processing cost remains high.
Content of the invention
In order to overcome the defect of above-mentioned prior art, the technical problem to be solved is to provide one kind can effectively subtract
Few die deformation, improves yield rate, accurately controls the mould outside diameter after quenching and outer round surface decorative pattern size and dimension
Thin-walled major diameter mould overall vacuum quenching technical.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is：
A kind of thin-walled major diameter mould overall vacuum quenching technical, comprises the steps：
Step 1, mould is vertically placed on a pallet, described pallet uniformly offers multiple first through holes；
Step 2, cover body is located on mould, in make mould be placed in cavity that cover body and pallet surround, described cover body
It is cylindrical in shape, described cover body is made up of side and top surface, between cover body and mould, leave the gap of 25～30mm, the top of described cover body
Face central authorities offer the second through hole, aperture ± 10mm, the side of described cover body and the top of a diameter of mould of described second through hole
Multiple passages are uniformly offered on face, the aperture of described passage is 5～6mm；
Step 3, mould is carried out vacuum hardening together with pallet and cover body.
The beneficial effects of the present invention is：It is different from prior art, after mould is located on pallet present invention cover body
Entirety carries out vacuum hardening again, makes the rate of cooling at each position of mould more uniform, thus reducing workpiece deflection；Cover body side
The passage of 5～6mm equally distributed with top surface, both can ensure that mould can compare and had been rapidly achieved hardening heat, saved power consumption, and
Can make to be insufflated to the air-flow of die surface evenly, thus reaching the effect reducing workpiece deformation.By thin using the present invention
Wall major diameter mould overall vacuum quenching technical, can effectively reduce die deformation, improve yield rate, accurately control the mould after quenching
Tool outside diameter and outer round surface decorative pattern size and dimension, material-saving, reduces following process surplus, need not repair after quenching
Decorative pattern size and dimension, reduces processing cost.
Brief description
Fig. 1 show the mould of thin-walled major diameter mould overall vacuum quenching technical and pallet, the dress of cover body of the present invention
Join schematic diagram.
Fig. 2 show the top view of Fig. 1.
Label declaration：
1- pallet；2- cover body；3- mould；10- first through hole；20- side；21- top surface；
200- second through hole；210- passage.
Specific embodiment
By describing the technology contents of the present invention in detail, being realized purpose and effect, below in conjunction with embodiment and coordinate attached
Figure is explained.
The design of most critical of the present invention is：After mould being located on pallet with cover body, entirety carries out vacuum hardening again,
And the technique of vacuum hardening is optimized.
Refer to Fig. 1 and Fig. 2, the thin-walled major diameter mould overall vacuum quenching technical that the present invention provides, including as follows
Step：
Step 1, mould 3 is vertically placed on a pallet 1, described pallet 1 uniformly offers multiple first through holes 10；
Step 2, cover body 2 is located on mould 3, in make mould 3 be placed in cavity that cover body 2 and pallet 1 surround, described
Cover body 2 is cylindrical in shape, and described cover body 2 is made up of side 20 and top surface 21, leaves the gap of 25～30mm between cover body 2 and mould 3,
Top surface 21 central authorities of described cover body 2 offer the second through hole 200, and the aperture of a diameter of mould 3 of described second through hole 200 ±
10mm, the side 20 of described cover body 2 and top surface 21 uniformly offer multiple passages 210, and the aperture of described passage 210 is
5～6mm；
Step 3, mould 3 is carried out vacuum hardening together with pallet 1 and cover body 2.
After setting up cover body, the volume being equivalent to whole mould becomes big, and weight increases, so heating up at 650～680 DEG C and protecting
The warm time respectively extends 10min, 850～880 DEG C of intensifications and temperature retention time and respectively extends 10min, 1050～1080 DEG C of intensifications and be incubated
Time lengthening 6min, 1150～1180 DEG C heat up and holding time 4min；Be equivalent to wall thickness increases simultaneously, and rate of cooling drops
Low, so by nitrogen (cooling medium) pressure, bringing up to 0.5～0.6MPa, rotation speed of fan is brought up to by original 2700r/min
2900～3000 revs/min it is ensured that there being enough rate of cooling, thus ensure quench after workpiece comprehensive mechanical performance.
Specifically, the vacuum hardening of described step 3 is carried out in vacuum air-quenching furnace, and the technique of vacuum hardening is：
(1) mould is warmed up to 650～680 DEG C from room temperature, heating-up time 50～55min, it is incubated 30～35min；
(2) mould is warmed up to 850～880 DEG C from 650～680 DEG C, heating-up time 35～40min, insulation 20～
25min；
(3) mould is warmed up to 1050～1080 DEG C from 850～880 DEG C, heating-up time 35～40min, insulation 20～
25min；
(4) mould is warmed up to 1150～1180 DEG C from 1050～1080 DEG C, heating-up time 30～35min, insulation 20～
25min；
(5) insulation terminates, the inflated with nitrogen toward in vacuum air-quenching furnace burner hearth, and nitrogen pressure is 0.5～0.6MPa, opens wind simultaneously
Machine, rotation speed of fan is 2900～3000 revs/min, and mould is quickly cooled to 100 DEG C；Again rotation speed of fan is reduced to 2400～
2500 revs/min, workpiece is cooled to 70 DEG C, then comes out of the stove.
Knowable to foregoing description, the beneficial effects of the present invention is：It is different from prior art, present invention cover body is by mould
After being located on pallet, entirety carries out vacuum hardening again, makes the rate of cooling at each position of mould more uniform, thus reducing workpiece
Deflection；Cover body side and the passage of the equally distributed 5～6mm of top surface, both can ensure that mould can compare and be rapidly achieved quenching
Temperature, saves power consumption, can make to be insufflated to the air-flow of die surface evenly again, thus reaching the effect reducing workpiece deformation.Logical
Cross the thin-walled major diameter mould vacuum hardening technique using the present invention, can effectively reduce die deformation, improve yield rate, accurately control
Mould outside diameter after system quenching and outer round surface decorative pattern size and dimension, material-saving, reduces following process surplus, quenches
Decorative pattern size and dimension need not be repaired after fire, reduce processing cost.
Further, the material of described cover body 2 is Q235-A, and the wall thickness of described cover body 2 is 4～5mm.
Knowable to foregoing description, the beneficial effects of the present invention is：Cover body selects Q235-A (A3) material, and fusing point is high, valency
Lattice are low, and wall thickness is chosen as 4～5mm, and the air quenching that so can reach a high temperature will not deform, and can mitigate weight simultaneously, reduce shove charge
Weight, saves power consumption.
Further, the pitch-row of described passage 210 is 15～20mm.
Knowable to foregoing description, the beneficial effects of the present invention is：By the pitch-row of passage is set to 15～20mm,
Can ensure cover body overall construction intensity in the case of distribution passage as much as possible, it is to avoid cover body deform, to the greatest extent may be used simultaneously
Passage more than energy can make workpiece reach hardening heat more quickly, saves power consumption, and the air-flow being insufflated to surface of the work is more equal
Even, thus reaching the effect reducing workpiece deformation.
Using the present invention thin-walled major diameter mould overall vacuum quenching technical to thin-walled major diameter mould (diameter >=
300mm, wall thickness 20mm～30mm) carry out vacuum hardening, the performance of obtained product is as follows：
1st, three-coordinate measuring machine or other appliance is adopted to detect deflection and the allowance of product
After overall vacuum quenching, the deflection of product is greatly decreased, and the allowance of mould outside diameter is greatly decreased.Than
As：The deflection of high speed steel mould is reduced to 1-1.5mm by original 2-2.5mm, and powder metallurgy die deflection is by original
1.5-2mm is reduced to 0.4-0.8mm, and need not repair outer round surface decorative pattern size and dimension.
2nd, Rockwell apparatus is adopted to detect the hardness of product
After overall vacuum quenching, the comprehensive mechanical performance of product keeps constant, each position hardness evenly, by originally differing
Within HRC2 is reduced to HRC1.
In sum, the thin-walled major diameter mould overall vacuum quenching technical that the present invention provides, can effectively reduce mould and become
Shape, improves yield rate, accurately controls the mould outside diameter after quenching and outer round surface decorative pattern size and dimension, saves material
Material, reduces following process surplus, need not repair decorative pattern size and dimension after quenching, reduces processing cost.
The foregoing is only embodiments of the invention, not thereby limit the present invention the scope of the claims, every using this
The equivalents that bright description and accompanying drawing content are made, or directly or indirectly it is used in the technical field of correlation, all include in the same manner
In the scope of patent protection of the present invention.
Claims (4)
1. a kind of thin-walled major diameter mould overall vacuum quenching technical is it is characterised in that comprise the steps：
Step 1, mould is vertically placed on a pallet, described pallet uniformly offers multiple first through holes；
Step 2, cover body is located on mould, in make mould be placed in cavity that cover body and pallet surround, described cover body is in cylinder
Shape, described cover body is made up of side and top surface, leaves the gap of 25～30mm, in the top surface of described cover body between cover body and mould
Centre offers the second through hole, and the aperture ± 10mm of a diameter of mould of described second through hole, on the side and top surface of described cover body
Uniformly offer multiple passages, the aperture of described passage is 5～6mm；
Step 3, mould is carried out vacuum hardening together with pallet and cover body.
2. thin-walled major diameter mould overall vacuum quenching technical according to claim 1 it is characterised in that：Described step 3
Vacuum hardening carry out in vacuum air-quenching furnace, the technique of vacuum hardening is：
(1) mould is warmed up to 650～680 DEG C from room temperature, heating-up time 50～55min, it is incubated 30～35min；
(2) mould is warmed up to 850～880 DEG C from 650～680 DEG C, heating-up time 35～40min, it is incubated 20～25min；
(3) mould is warmed up to 1050～1080 DEG C from 850～880 DEG C, heating-up time 35～40min, it is incubated 20～25min；
(4) mould is warmed up to 1150～1180 DEG C from 1050～1080 DEG C, heating-up time 30～35min, insulation 20～
25min；
(5) insulation terminates, the inflated with nitrogen toward in vacuum air-quenching furnace burner hearth, and nitrogen pressure is 0.5～0.6MPa, opens blower fan simultaneously,
Rotation speed of fan is 2900～3000 revs/min, and mould is quickly cooled to 100 DEG C；Again rotation speed of fan is reduced to 2400～
2500 revs/min, workpiece is cooled to 70 DEG C, then comes out of the stove.
3. thin-walled major diameter mould overall vacuum quenching technical according to claim 1 it is characterised in that：Described cover body
Material is Q235-A, and the wall thickness of described cover body is 4～5mm.
4. thin-walled major diameter mould overall vacuum quenching technical according to claim 1 it is characterised in that：Described passage
Pitch-row be 15～20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611110313.8A CN106399651B (en) | 2016-12-06 | 2016-12-06 | A kind of thin-walled major diameter mould overall vacuum quenching technical |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611110313.8A CN106399651B (en) | 2016-12-06 | 2016-12-06 | A kind of thin-walled major diameter mould overall vacuum quenching technical |
Publications (2)
| Publication Number | Publication Date |
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| CN106399651A true CN106399651A (en) | 2017-02-15 |
| CN106399651B CN106399651B (en) | 2018-04-03 |
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| CN201611110313.8A Active CN106399651B (en) | 2016-12-06 | 2016-12-06 | A kind of thin-walled major diameter mould overall vacuum quenching technical |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109338286A (en) * | 2018-10-08 | 2019-02-15 | 河南精诚汽车零部件有限公司 | A kind of boron-aluminium co-permeation treatment process of stamping die |
| CN109402332A (en) * | 2018-10-08 | 2019-03-01 | 河南精诚汽车零部件有限公司 | A kind of heat treatment process of aluminium alloy extrusion mould |
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| CN101760602A (en) * | 2009-12-25 | 2010-06-30 | 重庆齿轮箱有限责任公司 | Large-scale thin wall gear ring quenching deformation control method |
| CN201634734U (en) * | 2009-12-25 | 2010-11-17 | 重庆齿轮箱有限责任公司 | Special die for controlling quenching deformation of large thin-wall gear ring |
| WO2013047526A1 (en) * | 2011-09-30 | 2013-04-04 | 株式会社神戸製鋼所 | Method for manufacturing press-molded article and press molding equipment |
| CN104451069A (en) * | 2014-11-28 | 2015-03-25 | 江阴市晶磁电子有限公司 | Nitrogen-protection amorphous iron core heat treatment furnace |
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2016
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101457287A (en) * | 2008-12-30 | 2009-06-17 | 二重集团（德阳）重型装备股份有限公司 | Auxiliary quenching fixture and quenching method of thin wall internal tooth ring |
| CN101760602A (en) * | 2009-12-25 | 2010-06-30 | 重庆齿轮箱有限责任公司 | Large-scale thin wall gear ring quenching deformation control method |
| CN201634734U (en) * | 2009-12-25 | 2010-11-17 | 重庆齿轮箱有限责任公司 | Special die for controlling quenching deformation of large thin-wall gear ring |
| WO2013047526A1 (en) * | 2011-09-30 | 2013-04-04 | 株式会社神戸製鋼所 | Method for manufacturing press-molded article and press molding equipment |
| CN104451069A (en) * | 2014-11-28 | 2015-03-25 | 江阴市晶磁电子有限公司 | Nitrogen-protection amorphous iron core heat treatment furnace |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109338286A (en) * | 2018-10-08 | 2019-02-15 | 河南精诚汽车零部件有限公司 | A kind of boron-aluminium co-permeation treatment process of stamping die |
| CN109402332A (en) * | 2018-10-08 | 2019-03-01 | 河南精诚汽车零部件有限公司 | A kind of heat treatment process of aluminium alloy extrusion mould |
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| Publication number | Publication date |
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| CN106399651B (en) | 2018-04-03 |
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Denomination of invention: An integral vacuum quenching process for thin wall and large diameter die Effective date of registration: 20200927 Granted publication date: 20180403 Pledgee: Industrial Bank Limited by Share Ltd. Sanming branch Pledgor: SHENGZHI (FUJIAN) HEAT TREATMENT Co.,Ltd. Registration number: Y2020350000113 |
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