CN109517964A - A kind of mold vacuum heat treatment anti-deformation method - Google Patents
A kind of mold vacuum heat treatment anti-deformation method Download PDFInfo
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- CN109517964A CN109517964A CN201811623074.5A CN201811623074A CN109517964A CN 109517964 A CN109517964 A CN 109517964A CN 201811623074 A CN201811623074 A CN 201811623074A CN 109517964 A CN109517964 A CN 109517964A
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- mold
- heat treatment
- vacuum heat
- deformation method
- treatment anti
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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
- 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
-
- 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
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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)
Abstract
A kind of mold vacuum heat treatment anti-deformation method of the invention, it is characterised in that: the following steps are included: S1: heat-resisting filler is filled in each pores of mold, relatively deep biggish inner concave shape chamber；S2: the mold that will be filled with heat-resisting filler is packed into vacuum quencher, is heat-treated.With can be during not interfering die & mold treatment, by using some the exterior measures, to reduce mold because under thermal stress and structural stress comprehensive function, caused volume expansion and the advantages of deform caused by shrinking.
Description
Technical field
The present invention relates to heat treatment technics technology field more particularly to mold vacuum heat treatment anti-deformation methods.
Background technique
For mold in vacuum heat treatment, especially big mold is during vacuum hardening, due to die size effect and type
The depth of Cavity surface is different, when especially in the presence of large number of orifices and deeper cavity surface, each section heating and cooling velocity it is inconsistent
Caused by temperature difference, reasons such as non-isochronism of structural transformation in addition so that mold sections each section volume dilational is uneven,
Structural transformation it is uneven, so as to cause thermal stress caused by structural stress and mold internal-external temperature difference.When its internal stress is more than
When the yield limit of mold, the deformation of mold will be caused.Mold once deforms, for the good mold of roughing,
It can cause the apparent dimensional accuracy problem of mold cavity, for example, original designed hole site can shift, while to subsequent
Mold finishing brings bigger difficulty, significantly the delay mold process-cycle, influences to deliver goods.
At present for preventing the measure of deformation of heat treatment on die & mould, mainly by reasonable material, rationally design mould structure,
Heating temperature and control heating speed are pre-processed and reasonably selected to mold.But above-mentioned measure still cannot effectively be kept away
Exempt from the deformation during die & mold treatment, requirement of the deflection less than 3/1000ths in engineering is not achieved.
Therefore, how to prevent deformation of heat treatment on die & mould method from improving to existing, it is made to overcome the above problem, be this
A field technical staff problem urgently to be resolved.
Summary of the invention
It is an object of the present invention to provide it is a kind of can be during not interfering die & mold treatment, by using some
The exterior measures, to reduce mold because under thermal stress and structural stress comprehensive function, caused volume expansion and caused by shrinking
The mold vacuum heat treatment anti-deformation method of deformation.
To achieve the above objectives, the technical solution adopted by the present invention are as follows: a kind of mold vacuum heat treatment anti-deformation method,
It is characterized in that: the following steps are included:
S1: heat-resisting filler is filled in each pores of mold, relatively deep biggish inner concave shape chamber；
S2: the mold that will be filled with heat-resisting filler is packed into vacuum quencher, is heat-treated.
As an improvement, further including S11 in above-mentioned S1: will be filled with the mold of heat-resisting filler using external package measure into
The anti-hardening break processing of row.
Specifically, the external package measure in above-mentioned S11 be using asbestos by the position easy to crack of mold wrap up into
Row protection.
Specifically, heat-resisting filler in above-mentioned S1 is that asbestos, bloom, iron one of are cut or a variety of.It needs to illustrate
It is that asbestos, bloom, iron cuts is that can conduct heat and the preferable material of thermal insulation property.
Preferably, further including S10 in above-mentioned S1: meeting the mold of surface quality requirements after selection roughing, and check
Whether mold mesoporous, mold cavity surface are intact, if there are the places of cracking risk；Process is filled after there is no problem again；
Specifically, burr, sharp angles, defect should not occur in bore edges, mold cavity surface in mold in upper S10.
Preferably, the heat treatment method of segmentally heating is carried out in upper S2 using control heating speed.Guarantee each portion of mold
The temperature uniformity divided.
Specifically, above-mentioned control heating speed carries out the heat treatment method of segmentally heating are as follows: the room temperature~650 DEG C temperature rise period
Using 30~50 DEG C/h, 650~850 DEG C of temperature rise periods use 50~80 DEG C/h, and 850~austenitizing temperature temperature rise period uses
80~100 DEG C/h.
Compared with prior art, be the advantages of technical solution of the present invention: technical solution of the present invention mainly passes through outer secondary
Assistant's section cooperation heating speed controls to prevent mold vacuum heat treatment from deforming, and easy to operate, filler is easily sought, low in cost,
It does not need to realize by cumbersome mould material composition design, organization design and overall process process parameter control.On the one hand it gives
Die & mold treatment operator simplifies, operability with higher, on the other hand, is greatly saved and seeks small deformation material
The cost of material effectively reduces mold vacuum heat treatment deflection, ensure that going on smoothly for the subsequent finishing of mold.
Detailed description of the invention
Fig. 1 be using a preferred embodiment of the present invention to certain populated heat-resisting filler of vehicle floor side member compression mod after
Scene photograph；
Fig. 2 be using a preferred embodiment of the present invention to certain populated heat-resisting filler of vehicle damping tower compression mod after
Scene photograph；
Fig. 3 be using a preferred embodiment of the present invention to certain vehicle floor side member compression mod carry out vacuum heat treatment after,
Whether there is or not three-dimensional coordinates measurement deflection comparative result figures when heat-resisting filler；
Fig. 4 be using a preferred embodiment of the present invention to certain vehicle damping tower compression mod carry out vacuum heat treatment after,
Whether there is or not three-dimensional coordinates measurement deflection comparative result figures when heat-resisting filler.
Specific embodiment
It is described below for disclosing the present invention so that those skilled in the art can be realized the present invention.It is excellent in being described below
Embodiment is selected to be only used as illustrating, it may occur to persons skilled in the art that other obvious modifications.
In the description of the present invention, it should be noted that " transverse direction ", " vertical if any term " center " for the noun of locality
To ", " length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top",
The indicating positions such as "bottom", "inner", "outside", " clockwise ", " counterclockwise " and positional relationship are orientation based on the figure or position
Relationship is set, the narration present invention is merely for convenience of and simplifies description, rather than the device or element of indication or suggestion meaning are necessary
It constructs and operates with specific orientation, with particular orientation, should not be understood as limiting specific protection scope of the invention.
Embodiment one:
In embodiment one kind, tested using certain automobile rear longitudinal girder compression mod made of SDYZ steel, as shown in Fig. 1,
Specific vacuum heat treatment anti-deformation method is as follows:
Meet the mold of surface quality requirements after step 1, selection roughing, and whether checks mold mesoporous, mold cavity surface
It is intact, if there are the place of cracking risk, burr, sharp angles, defect should not occur in bore edges, mold cavity surface in mold
Deng.
Step 2 will meet the die surface that step 1 requires and clean out, then in each pores, relatively deep biggish inner concave shape
Asbestos are filled in chamber, bloom, iron are cut etc. can conduct heat and the preferable material of thermal insulation property.
Position easy to crack is wrapped up using asbestos and is protected by step 3 by the mold after the completion of step 2.
Mold after the completion of step 3 is packed into vacuum quencher by step 4, is segmented using control heating speed method
Heating, guarantees the temperature uniformity of mold portions.Specific segmentally heating method and heating speed are as follows: room temperature~650 DEG C heating
Stage uses 30 DEG C/h, and 650~850 DEG C of temperature rise periods use 50 DEG C/h, and 850~austenitizing temperature temperature rise period uses 80
℃/h。
Maximum length, width and height are measured using three-coordinates measuring machine, 2 points is measured in X and Z-direction, measures 4 in the Y direction
Point.It finally obtains filling and without the change in size after filler die & mold treatment, can be obtained in conjunction with initial mold dimensions
Deflection after to die & mold treatment, the die deformation rate of filler does not have the mould of filler substantially in 0.2%-0.35%
Has deformation rate substantially in 0.05%-0.15%, deformation rate can reduce 2-3 times, as shown in Fig. 3.
Implement two:
In example 2, it is tested using certain automobile shock tower compression mod made of SDYZ steel, as shown in Fig. 2,
Specific vacuum heat treatment anti-deformation method is as follows:
Meet the mold of surface quality requirements after step 1, selection roughing, and whether checks mold mesoporous, mold cavity surface
It is intact, if there are the place of cracking risk, burr, sharp angles, defect should not occur in bore edges, mold cavity surface in mold
Deng；
Step 2 will meet the die surface that step 1 requires and clean out, then in each pores, relatively deep biggish inner concave shape
Asbestos are filled in chamber, bloom, iron are cut etc. can conduct heat and the preferable material of thermal insulation property；
Position easy to crack is wrapped up using asbestos and is protected by step 3 by the mold after the completion of step 2；
Mold after the completion of step 3 is packed into vacuum quencher by step 4, is segmented using control heating speed method
Heating, guarantees the temperature uniformity of mold portions.Specific segmentally heating method and heating speed are as follows: room temperature~650 DEG C heating
Stage uses 50 DEG C/h, and 650~850 DEG C of temperature rise periods use 80 DEG C/h, and 850~austenitizing temperature temperature rise period uses 100
℃/h。
Maximum length, width and height are measured using three-coordinates measuring machine, 2 points is measured in X and Z-direction, measures 4 in the Y direction
Point.It finally obtains filling and without the change in size after filler die & mold treatment, can be obtained in conjunction with initial mold dimensions
Deflection after to die & mold treatment, the die deformation rate of filler does not have the mould of filler substantially in 0.4%-0.55%
Has deformation rate substantially in 0.15%-0.25%, deformation rate can reduce 2-3 times, as shown in Fig. 4.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and what is described in the above embodiment and the description is only the present invention
Principle, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these variation and
Improvement is both fallen in the range of claimed invention.The present invention claims protection scope by appended claims and its
Equivalent defines.
Claims (8)
1. a kind of mold vacuum heat treatment anti-deformation method, it is characterised in that: the following steps are included:
S1: heat-resisting filler is filled in each pores of mold, relatively deep biggish inner concave shape chamber；
S2: the mold that will be filled with heat-resisting filler is packed into vacuum quencher, is heat-treated.
2. a kind of mold vacuum heat treatment anti-deformation method according to claim 1, it is characterised in that: also wrapped in above-mentioned S1
Include S11: the mold that will be filled with heat-resisting filler carries out anti-hardening break processing using external package measure.
3. a kind of mold vacuum heat treatment anti-deformation method according to claim 2, it is characterised in that: in above-mentioned S11
External package measure is to wrap up the position easy to crack of mold using asbestos to protect.
4. a kind of mold vacuum heat treatment anti-deformation method according to claim 1, it is characterised in that: resistance in above-mentioned S1
Hot filler is that asbestos, bloom, iron one of are cut or a variety of.
5. a kind of mold vacuum heat treatment anti-deformation method according to claim 1, it is characterised in that: also wrapped in above-mentioned S1
It includes S10: meeting the mold of surface quality requirements after selection roughing, and check whether mold mesoporous, mold cavity surface are intact, if
There are the places of cracking risk；Process is filled after there is no problem again.
6. a kind of mold vacuum heat treatment anti-deformation method according to claim 5, it is characterised in that: the mould in upper S10
Burr, sharp angles, defect should not occur in bore edges, mold cavity surface in tool.
7. a kind of mold vacuum heat treatment anti-deformation method according to claim 1, it is characterised in that: using control in upper S2
Heating speed processed carries out the heat treatment method of segmentally heating.
8. a kind of mold vacuum heat treatment anti-deformation method according to claim 7, it is characterised in that: above-mentioned control heating
The heat treatment method of speed progress segmentally heating are as follows: the room temperature~650 DEG C temperature rise period uses 30~50 DEG C/h, and 650~850 DEG C rise
Thermophase uses 50~80 DEG C/h, and 850~austenitizing temperature temperature rise period uses 80~100 DEG C/h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811623074.5A CN109517964A (en) | 2018-12-28 | 2018-12-28 | A kind of mold vacuum heat treatment anti-deformation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811623074.5A CN109517964A (en) | 2018-12-28 | 2018-12-28 | A kind of mold vacuum heat treatment anti-deformation method |
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| CN109517964A true CN109517964A (en) | 2019-03-26 |
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| CN201811623074.5A Pending CN109517964A (en) | 2018-12-28 | 2018-12-28 | A kind of mold vacuum heat treatment anti-deformation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115259640A (en) * | 2022-04-15 | 2022-11-01 | 常熟佳合显示科技有限公司 | Heat treatment method and device for special-shaped curved surface cover plate |
| CN115259640B (en) * | 2022-04-15 | 2024-05-14 | 常熟佳合显示科技有限公司 | Heat treatment method and device for special-shaped curved surface cover plate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115259640A (en) * | 2022-04-15 | 2022-11-01 | 常熟佳合显示科技有限公司 | Heat treatment method and device for special-shaped curved surface cover plate |
| CN115259640B (en) * | 2022-04-15 | 2024-05-14 | 常熟佳合显示科技有限公司 | Heat treatment method and device for special-shaped curved surface cover plate |
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Application publication date: 20190326 |