CN106191424A - A kind of modification method of box heat treatment heating furnace temperature retention time - Google Patents
A kind of modification method of box heat treatment heating furnace temperature retention time Download PDFInfo
- Publication number
- CN106191424A CN106191424A CN201610806232.5A CN201610806232A CN106191424A CN 106191424 A CN106191424 A CN 106191424A CN 201610806232 A CN201610806232 A CN 201610806232A CN 106191424 A CN106191424 A CN 106191424A
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- temperature
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- heat treatment
- heating furnace
- box heat
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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
- C21D11/00—Process control or regulation for heat treatments
-
- 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
- C21D1/28—Normalising
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- 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)
- Control Of Heat Treatment Processes (AREA)
Abstract
The invention provides the modification method of a kind of box heat treatment heating furnace temperature retention time, it comprises the following steps: (1), arrange a number of temperature thermocouple in the effective heating area of box heat treatment heating furnace；(2), in temperature-rise period, when the thermometric instrument of box heat treatment heating furnace is shown as design temperature, record this time for the insulation time started, hereafter the temperature of the temperature thermocouple that separated in time is arranged in measuring this heating furnace, when the temperature of each temperature thermocouple is in the deviation range of permission with design temperature, recording this time is the samming time started, and the time difference between samming time started and insulation time started is designated as Δ t；(3), the heat treatment time of the then actual execution of Technology for Heating Processing should be heat treatment time and the Δ t sum of Technology for Heating Processing evaluation.
Description
Technical field
The present invention relates to the modification method of a kind of box heat treatment heating furnace temperature retention time, belong to technical field of heat treatment.
Background technology
Box heat treatment heating furnace has a wide range of applications in the industrial production, its be mainly used in workpiece normalizing, quenching,
Heating in annealing and drawing process.Box heat treatment heating furnace is relatively large due to volume, and is arranged by temperature thermocouple
Position, mode of heating etc. affect, and the temperature homogeneity in burner hearth is poor, causes the actual holding temperature in heating process and insulation
The temperature and time deviation that time requires with Technology for Heating Processing.
When box heat treatment heating furnace is heated, need to preset and add thermal target holding temperature, when temperature arrives
During target holding temperature, regulate heating power by the PID of heating furnace own temperature instrument and enter holding stage.Now in burner hearth
Each point temperature actually and miss the mark holding temperature, the target insulation temperature of the actual temperature of each point and setting in burner hearth
There is more significantly difference in degree.
Prior art related to the present invention:
Present stage utilizes box heat treatment heating furnace all to preset process goal holding temperature and temperature retention time when heating,
The difference of each point temperature in burner hearth was not considered workpiece is incubated when, or simply in the technique temperature retention time of evaluation
On the basis of add a time empirical parameter.This time empirical parameter is entirely derived from experience, and the stringency that technique performs is poor.
Now, it is difficult to realize consistent with the process time of the temperature retention time of holding stage.Owing in burner hearth, each point exists temperature
Degree difference, simply considers the temperature of the temperature thermocouple of heating furnace itself, when the temperature of this thermocouple reaches target insulation temperature
When spending, i.e. start to calculate temperature retention time, and the now temperature of other positions miss the mark holding temperature in burner hearth, cause reality
Obvious time difference is there is in the temperature retention time on border with the temperature retention time of technological requirement.
Summary of the invention
During in order to solve that in prior art, workpiece carries out heat treatment in box heat treatment heating furnace, when starting due to insulation
Between and the difference of samming time started be likely to result in the problem that the temperature retention time of normalizing is shorter than technological requirement, the present invention combines box
The feature of heat treatment heating furnace, it is considered to equal temperature time, revises workpiece temperature retention time in heat-treatment furnace.That is, the mesh of the present invention
Be to provide the modification method of a kind of box heat treatment heating furnace temperature retention time.
For reaching above-mentioned purpose, the present invention provides the modification method of a kind of box heat treatment heating furnace temperature retention time, its bag
Include following steps:
(1), in the effective heating area of box heat treatment heating furnace, a number of temperature thermocouple is arranged；
(2), in temperature-rise period, when the thermometric instrument of box heat treatment heating furnace is shown as design temperature, record should
Time is insulation time started, the hereafter temperature of the temperature thermocouple that separated in time is arranged in measuring this heating furnace, when
When the temperature of each temperature thermocouple is in the deviation range of permission with design temperature, recording this time is the samming time started,
And the time difference between samming time started and insulation time started is designated as Δ t；
(3), the heat treatment time of the then actual execution of Technology for Heating Processing should be Technology for Heating Processing evaluation heat treatment time with
Δ t sum.
According to method of the present invention, it is preferable that step (1) comprises the following steps: with reference to GB/T 9452 " heat treatment
Stove effective heating area assay method " in regulation in the effective heating area of described box heat treatment heating furnace arrange some
Temperature thermocouple.
Additionally, position and the quantity of temperature thermocouple in step (1) are not done specific requirement, this area skill by the present invention
Art personnel are referred to the regulation in GB/T 9452 " heat-treatment furnace effective heating area assay method " and combine field operation needs
The position of reasonable Arrangement temperature thermocouple also selects appropriate number of temperature thermocouple.As: special to some heating locations and
Rearrangement temperature thermocouple should be answered from the temperature thermocouple remote position of burner hearth itself.
According to method of the present invention, in step (2), for the display of box heat treatment heating furnace own temperature instrument
Temperature is with the difference existed between the temperature of the temperature thermocouple of actual arrangement in burner hearth.The present invention defines: heating furnace self instrument
It is the insulation time started that table arrives the time point of target temperature, to be incubated the time started as starting point, in burner hearth the temperature of each point by
Gradually close to target heating temperature, within the scope of in burner hearth, each point actual temperature is in the temperature deviation of permission with target temperature
Time point is defined as the samming time started.Schematic diagram is as shown in Figure 1.
In actual heat treatment process, all with the insulation time started as starting point, do not calculate from the insulation time started to all
The samming process of temperature time started, as shown in Figure 1.Therefore, the present invention is directed to be incubated the time started with the samming time started between
The time difference existed is demarcated, to revise the temperature retention time of heating furnace.
Additionally, the common knowledge that " deviation range of permission " is this area described in step (2), different accuracy requires
" deviation range of permission " of box heat treatment heating furnace is different, and the such as precision of III level heat treatment is ± 10 DEG C).
" separated in time " described in step (2) is that those skilled in the art can need to carry out according to field operation
The time rationally arranged, such as: under relatively lower temp during insulation, due between the insulation time started to samming time started
Every longer, typically can rule of thumb be spaced the long period, and when higher temperature is incubated, interval time can obtain relatively short one
A bit.In actual mechanical process, interval time typically takes 5 minutes.
The modification method of box heat treatment heating furnace temperature retention time provided by the present invention passes through in insulating process adding
The mensuration of the Actual-Temperature-Points in the effective heating area of hot stove, revises the temperature retention time during heat treatment of workpieces, thus ensures
The accurate execution of the Technology for Heating Processing of workpiece so that the execution of Technology for Heating Processing obtains more precise control.
Accompanying drawing explanation
Fig. 1 is heat treatment cycle curve schematic diagram of the present invention；
Fig. 2 a-Fig. 2 c is that in the embodiment of the present invention, temperature thermocouple arranges schematic diagram；
Fig. 3 be in the embodiment of the present invention time difference Δ t and temperature between samming time started and insulation time started it
Between graph of relation.
Detailed description of the invention
In order to the technical characteristic of the present invention, purpose and beneficial effect are more clearly understood from, in conjunction with in detail below
Technical scheme is carried out described further below by embodiment and Figure of description, but it is not intended that to the present invention can
The restriction of practical range.
Embodiment 1
Present embodiments providing the modification method of a kind of box heat treatment heating furnace temperature retention time, it comprises the following steps:
(1), at box heat treatment heating furnace, (model that Wuhan Jiahua Furnace Industry Co., Ltd. produces is adding of RT3-750-12
Hot stove) effective heating area in arrange a number of temperature thermocouple；
(2), in temperature-rise period, when the thermometric instrument of box heat treatment heating furnace is shown as design temperature, record should
Time is insulation time started, the hereafter temperature of the temperature thermocouple that separated in time is arranged in measuring this heating furnace, when
The temperature of each temperature thermocouple is in the deviation range of permission (precision such as III level heat treatment is ± 10 DEG C) with design temperature
Time, recording this time is the samming time started, and the time difference between samming time started and insulation time started is designated as Δ
t；
(3), the heat treatment time of the then actual execution of Technology for Heating Processing should be Technology for Heating Processing evaluation heat treatment time with
Δ t sum；
Wherein, step (1) comprises the following steps: with reference in GB/T 9452 " heat-treatment furnace effective heating area assay method "
Regulation in the effective heating area of described box heat treatment heating furnace, arrange a number of temperature thermocouple, in the present embodiment
The layout schematic diagram of temperature thermocouple is as shown in Fig. 2 a-Fig. 2 c, and the present embodiment arranges 9 temperature thermocouples altogether, and particular location is such as
Shown in Fig. 2 c, it is designated as K1-K9 respectively.
Thus, the present embodiment can in different temperature points, calibrate from insulation time started to the samming time started time
Between section.Such as to this box heat treatment heating furnace 600 DEG C, 770 DEG C, 950 DEG C, the 1050 DEG C times reaching temperature basically identical big
About it is respectively 70 minutes, 55 minutes, 40 minutes, 30 minutes, i.e. time difference between samming time started and insulation time started
Δ t is respectively 70 minutes, 55 minutes, 40 minutes, 30 minutes.Wherein, with between samming time started and insulation time started
Time difference Δ t (unit for minute) is vertical coordinate, with temperature (unit for degree Celsius) as abscissa, and relation curve therebetween
Figure is as shown in Figure 3.
Visible, in industrial processes, owing to by size of burner hearth large effect, in burner hearth, each point exists temperature difference
Different, reason is the insulation time started that the thermometric instrument of Equipment for Heating Processing monitors to reach the consistent samming time started with temperature
There is the regular hour poor, cause the deficiency of temperature retention time.In actual technology establishment, should be in conjunction with Equipment for Heating Processing to each
The temperature retention time of temperature spot is modified.For the example shown in Fig. 3, if the technique of Technology for Heating Processing evaluation is 1050 DEG C of guarantors
Temperature 90 minutes, then should control with the samming time started existence difference of 30 minutes, the actual technique performed according to the insulation time started
Being made as on the basis of being incubated 90 minutes adding the equal temperature time of 30 minutes, last technique should be 1050 DEG C and is incubated 120 minutes.
Claims (2)
1. a modification method for box heat treatment heating furnace temperature retention time, it comprises the following steps:
(1), in the effective heating area of box heat treatment heating furnace, a number of temperature thermocouple is arranged；
(2), in temperature-rise period, when the thermometric instrument of box heat treatment heating furnace is shown as design temperature, this time is recorded
For being incubated the time started, the hereafter temperature of the temperature thermocouple that separated in time is arranged in measuring this heating furnace, when each survey
When the temperature of warm galvanic couple is in the deviation range of permission with design temperature, recording this time is the samming time started, and will
Time difference between samming time started and insulation time started is designated as Δ t；
(3), the heat treatment time of the then actual execution of Technology for Heating Processing should be Technology for Heating Processing evaluation heat treatment time and Δ t it
With.
Method the most according to claim 1, it is characterised in that step (1) comprises the following steps: with reference to GB/T 9452 " heat
Process stove effective heating area assay method " in regulation arrange certain in the effective heating area of described box heat treatment heating furnace
The temperature thermocouple of quantity.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610806232.5A CN106191424A (en) | 2016-09-06 | 2016-09-06 | A kind of modification method of box heat treatment heating furnace temperature retention time |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610806232.5A CN106191424A (en) | 2016-09-06 | 2016-09-06 | A kind of modification method of box heat treatment heating furnace temperature retention time |
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| CN106191424A true CN106191424A (en) | 2016-12-07 |
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| CN201610806232.5A Pending CN106191424A (en) | 2016-09-06 | 2016-09-06 | A kind of modification method of box heat treatment heating furnace temperature retention time |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110587050A (en) * | 2019-09-24 | 2019-12-20 | 贵州永红航空机械有限责任公司 | Brazing method for controlling ablation and cracks of titanium and titanium alloy plate fin radiator |
Citations (4)
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|---|---|---|---|---|
| CN102344998A (en) * | 2011-07-21 | 2012-02-08 | 南京迪威尔重型锻造股份有限公司 | Method for determining quenching soaking time of shaft parts |
| CN103060538A (en) * | 2011-10-19 | 2013-04-24 | 昆山鑫昌泰模具科技有限公司 | Setting method in sections of high alloy steel vacuum heat treatment high-temperature region parameters |
| CN105567947A (en) * | 2015-12-24 | 2016-05-11 | 江苏丰东热技术股份有限公司 | Method for determining heat preservation time |
| CN105838869A (en) * | 2015-01-15 | 2016-08-10 | 宝山钢铁股份有限公司 | Steel plate quenching furnace heating process on-line adjustment method |
-
2016
- 2016-09-06 CN CN201610806232.5A patent/CN106191424A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102344998A (en) * | 2011-07-21 | 2012-02-08 | 南京迪威尔重型锻造股份有限公司 | Method for determining quenching soaking time of shaft parts |
| CN103060538A (en) * | 2011-10-19 | 2013-04-24 | 昆山鑫昌泰模具科技有限公司 | Setting method in sections of high alloy steel vacuum heat treatment high-temperature region parameters |
| CN105838869A (en) * | 2015-01-15 | 2016-08-10 | 宝山钢铁股份有限公司 | Steel plate quenching furnace heating process on-line adjustment method |
| CN105567947A (en) * | 2015-12-24 | 2016-05-11 | 江苏丰东热技术股份有限公司 | Method for determining heat preservation time |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110587050A (en) * | 2019-09-24 | 2019-12-20 | 贵州永红航空机械有限责任公司 | Brazing method for controlling ablation and cracks of titanium and titanium alloy plate fin radiator |
| CN110587050B (en) * | 2019-09-24 | 2021-08-27 | 贵州永红航空机械有限责任公司 | Brazing method for controlling ablation and cracks of titanium and titanium alloy plate fin radiator |
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Application publication date: 20161207 |