CN107326323A - A kind of carbo-nitriding is heat-treated the real-time verification method of carbon potential - Google Patents
A kind of carbo-nitriding is heat-treated the real-time verification method of carbon potential Download PDFInfo
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- CN107326323A CN107326323A CN201710485195.7A CN201710485195A CN107326323A CN 107326323 A CN107326323 A CN 107326323A CN 201710485195 A CN201710485195 A CN 201710485195A CN 107326323 A CN107326323 A CN 107326323A
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- steel disc
- heat
- carbon potential
- carbo
- real
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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
- C23C8/28—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 one step
- C23C8/30—Carbo-nitriding
- C23C8/32—Carbo-nitriding of ferrous surfaces
-
- 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
- C21D1/76—Adjusting the composition of the atmosphere
Abstract
The invention discloses a kind of real-time verification method that carbo-nitriding is heat-treated carbon potential, it is related to carbon potential determination techniques field.This method step is as follows：S1, from low-carbon steel disc, steel disc supply of material state is cold rolling state；S2, steel disc first carry out surface clean before heat-treatment furnace is entered；S3, by sampler the thief hole of steel disc from heat-treatment furnace furnace roof is put into stove, allows steel disc to be handled with Technology for Heating Processing, keep 30 ~ 45min, move 2 ~ 3min of slow cooling in sampler to and take out；S4, steel disc carry out surface clean, and dry, broken；S5, weigh up sample with a ten thousandth balance, input computer, Infrared Carbon-sulphur analysis is carried out by selected analysis operation mode, analyze C, S content.Present invention process is simple, workable, non-maintaining, effectively can carry out real-time verification to carbo-nitriding heat treatment carbon potential, be advantageously implemented the accurate control to carbon potential.
Description
Technical field
The present invention relates to carbon potential determination techniques field, more particularly to a kind of carbo-nitriding is heat-treated the real-time verification of carbon potential
Method.
Background technology
Atmosphere controlled heat treatment furnace is the equipment that surface peening is carried out to workpiece surface using carburizing or cyanidation technology, its temperature
Degree and the accuracy of carbon-potential control will directly influence the performance of component surface modified layer.
In the prior art, the measuring method of carbon potential mainly has direct measurement and indirectly two kinds of measurement in stove, so-called directly to survey
Amount is exactly to be represented with balance carbon amounts of the low-carbon steel foil in carbon-containing atmosphere.Specific measuring method is as follows：When carbon potential is stable in stove
After, the steel foil with iron wire system is put into stove from the thief hole with water collar, blind nut is then screwed on；After 30 ~ 45min
The blind nut in sample hole is taken down, Qi Kou is blocked with asbestos cloth, iron wire is taken out；Steel foil in water collar after sufficiently cool 2 ~ 3min
（Prevent oxidation and decarbonization）Take out, wipe the carbon black on steel foil surface；Then its phosphorus content is determined with weight method（C%）, then this phosphorus content
It is just the carbon potential of furnace gas（Cη）.Carbon Potential Inside Furnace value, its calculation formula can be calculated exactly by being weighed with the balance of a ten thousandth
It is as follows：Cη（C%）=| W1×a%+(W2-W1)/W2| × 100%, in formula：W1For the weight before steel foil carburizing；W2After steel foil carburizing
Weight；A% is the original phosphorus content before steel foil carburizing.
, just can not be accurate using weight method due to the presence of nitrogen-atoms when workpiece needs to carry out carbo-nitriding heat treatment
Measure carbon potential in stove；In addition, steel foil is forbidden in sample making course because of situations such as oxidation, carburetting, defect are easily caused testing result
Really, referential is relatively low during practical application.
The content of the invention
When the technical problems to be solved by the invention are carbo-nitriding heat treatment in stove carbon potential can not Accurate Determining, overcome existing
There is technology there is provided a kind of real-time verification method that carbo-nitriding is heat-treated carbon potential, effectively carbo-nitriding can be heat-treated
When carbon potential carry out real-time verification, be advantageously implemented the accurate control to carbon potential.
In order to solve the above technical problems, the present invention provides a kind of real-time verification method that carbo-nitriding is heat-treated carbon potential,
This method step is as follows：
S1, from low-carbon steel disc, steel disc supply of material state is cold rolling state；
S2, steel disc first carry out surface clean before heat-treatment furnace is entered；
S3, by sampler the thief hole of steel disc from heat-treatment furnace furnace roof is put into stove, allows steel disc to enter with Technology for Heating Processing
Row processing, keeps 30 ~ 45min, moves 2 ~ 3min of slow cooling in sampler to and takes out；
S4, steel disc carry out surface clean, and dry, broken；
S5, weigh up sample with a ten thousandth balance, input computer, Infrared Carbon-sulphur analysis is carried out by selected analysis operation mode,
Analyze C, S content.
The beneficial effects of the invention are as follows：The present invention utilizes low-carbon steel disc for a period of time, to make steel disc in heat-treatment furnace inside holding
Balance is basically reached with carbon potential in stove, then carbon of the steel disc after carbo-nitriding is accurately measured by Infrared Carbon-sulphur analytic approach and is contained
Amount, thus characterizes the actual carbon potential under state at that time in stove, this numerical value is entered with the carbon-potential control value under measuring state at that time
Row comparative analysis is verified, to reach the purpose accurately controlled to carbon potential in stove in carbo-nitriding Technology for Heating Processing.Work of the present invention
Skill is simple, workable, non-maintaining, effectively can carry out real-time verification to carbo-nitriding heat treatment carbon potential, be advantageously implemented pair
The accurate control of carbon potential.
The technical scheme that further limits of the present invention is：
Further, the steel disc in step S1 is using 08,08F or 08A1 Fine Steel Casting irons.
The steel plate thickness that a kind of preceding described carbo-nitriding is heat-treated in the real-time verification method of carbon potential, step S1 be equal to or
Less than 0.1mm, and thickness deviation is less than 0.01mm.
A kind of preceding described carbo-nitriding is heat-treated the steel disc surface requirements light in the real-time verification method of carbon potential, step S1
Bright, non-oxidation and corrosion, steel disc edge is without flash, burr.
It is first before washing that a kind of preceding described carbo-nitriding is heat-treated steel disc in the real-time verification method of carbon potential, step S2
With abrasive paper for metallograph polishing steel disc surface.
Steel disc is clear in a kind of real-time verification method of preceding described carbo-nitriding heat treatment carbon potential, step S2 and step S4
Wash and cleaned using analysis pure acetone or scavenger specially.
A kind of preceding described carbo-nitriding, which is heat-treated steel disc in the real-time verification method of carbon potential, step S3, will wait heat-treatment furnace
Carbon potential reaches and placed into after setting value in stove.
The sampler that a kind of preceding described carbo-nitriding is heat-treated in the real-time verification method of carbon potential, step S3 includes cold
But sleeve pipe and iron wire, iron wire are tied up on steel disc, and cooling collar is located at thief hole.
（1）Steel disc surface is first polished in the present invention, is cleaned with pure or scavenger specially is analyzed, is kept cleaning, anaerobic
Change and corrosion, no flash and burr, in order to avoid because oxidation, carburetting, defect etc. cause testing result inaccurate；
（2）Steel disc wants carbon potential in stove to be heated to reach that setting value is placed into the present invention, can be obtained most with will pass through steel disc
Close to the carbon potential real-time measurement values of carbon-potential control value, detection accuracy is improved.
Embodiment
A kind of carbo-nitriding that the present embodiment is provided is heat-treated the real-time verification method of carbon potential, and step is as follows：
S1, from 08 Fine Steel Casting iron as low-carbon steel disc, steel disc supply of material state is cold rolling state, and thickness is 0.1mm, and thickness is inclined
Difference is less than 0.01mm, surface requirements light, non-oxidation and corrosion, and edge is without flash, burr；
S2, steel disc are first polished with abrasive paper for metallograph, and steel disc surface is cleaned with analysis pure acetone before heat-treatment furnace is entered；
S3, etc. in heat-treatment furnace carbon potential reach after setting value, by sampler by steel disc from the sampling of heat-treatment furnace furnace roof
Hole is put into stove, allows steel disc to be handled with Technology for Heating Processing, is kept 30 ~ 40min, is moved 2 ~ 3min of slow cooling in sampler to and take
Go out；Sampler includes cooling collar and iron wire, and iron wire is tied up on steel disc, and cooling collar is located at thief hole；
S4, with analysis pure acetone steel disc surface is cleaned, and drying, it is broken；
S5, weigh up sample with a ten thousandth balance, input computer, Infrared Carbon-sulphur analysis is carried out by selected analysis operation mode,
Analyze C, S content.
Finally the carbon potential real-time measurement values measured and carbon-potential control value are compared, so as to the carbon potential in heat-treatment furnace
It is adjusted.
In addition to the implementation, the present invention can also have other embodiment.All use equivalent substitution or equivalent transformation shape
Into technical scheme, all fall within the protection domain of application claims.
Claims (8)
1. a kind of carbo-nitriding is heat-treated the real-time verification method of carbon potential, it is characterised in that：This method step is as follows：
S1, from low-carbon steel disc, steel disc supply of material state is cold rolling state；
S2, steel disc first carry out surface clean before heat-treatment furnace is entered；
S3, by sampler the thief hole of steel disc from heat-treatment furnace furnace roof is put into stove, allows steel disc to enter with Technology for Heating Processing
Row processing, keeps 30 ~ 45min, moves 2 ~ 3min of slow cooling in sampler to and takes out；
S4, steel disc carry out surface clean, and dry, broken；
S5, weigh up sample with a ten thousandth balance, input computer, Infrared Carbon-sulphur analysis is carried out by selected analysis operation mode,
Analyze C, S content.
2. a kind of carbo-nitriding according to claim 1 is heat-treated the real-time verification method of carbon potential, it is characterised in that：It is described
Steel disc in step S1 is using 08,08F or 08A1 Fine Steel Casting irons.
3. a kind of carbo-nitriding according to claim 1 is heat-treated the real-time verification method of carbon potential, it is characterised in that：It is described
Steel plate thickness in step S1 is equal to or less than 0.1mm, and thickness deviation is less than 0.01mm.
4. a kind of carbo-nitriding according to claim 1 is heat-treated the real-time verification method of carbon potential, it is characterised in that：It is described
Steel disc surface requirements light, non-oxidation and corrosion in step S1, steel disc edge is without flash, burr.
5. a kind of carbo-nitriding according to claim 1 is heat-treated the real-time verification method of carbon potential, it is characterised in that：It is described
Steel disc is before washing first with abrasive paper for metallograph polishing steel disc surface in step S2.
6. a kind of carbo-nitriding according to claim 1 is heat-treated the real-time verification method of carbon potential, it is characterised in that：It is described
The cleaning of steel disc is cleaned using analysis pure acetone or scavenger specially in step S2 and step S4.
7. a kind of carbo-nitriding according to claim 1 is heat-treated the real-time verification method of carbon potential, it is characterised in that：It is described
Steel disc will wait in heat-treatment furnace carbon potential to reach and be placed into after setting value in step S3.
8. a kind of carbo-nitriding according to claim 1 is heat-treated the real-time verification method of carbon potential, it is characterised in that：It is described
Sampler in step S3 includes cooling collar and iron wire, and the iron wire is tied up on the steel disc, and the cooling collar is located at
At thief hole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710485195.7A CN107326323A (en) | 2017-06-23 | 2017-06-23 | A kind of carbo-nitriding is heat-treated the real-time verification method of carbon potential |
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| CN201710485195.7A CN107326323A (en) | 2017-06-23 | 2017-06-23 | A kind of carbo-nitriding is heat-treated the real-time verification method of carbon potential |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1542427A (en) * | 2003-11-06 | 2004-11-03 | 上海交通大学 | Loadable sampling and gas extracting apparatus for controlling atmosphere furnace |
| CN1560318A (en) * | 2004-03-04 | 2005-01-05 | 上海交通大学 | Apparatus of dynamic testing controlling for carbon potential of vacuum furnace |
| CN1587976A (en) * | 2004-10-14 | 2005-03-02 | 上海交通大学 | Real time detecting method for gas carburization three dimension concentration field of complicate shape workpiece |
| CN101187002A (en) * | 2007-12-29 | 2008-05-28 | 江苏丰东热技术股份有限公司 | Carburizing process for reducing internal oxidation |
| CN204405471U (en) * | 2015-03-16 | 2015-06-17 | 山推工程机械股份有限公司 | Carbon protective valve determined by a kind of cementing furnace steel foil |
| CN104865196A (en) * | 2014-09-09 | 2015-08-26 | 浙江迪特高强度螺栓有限公司 | Measuring method of carbon content inside mesh belt heat treatment furnace |
-
2017
- 2017-06-23 CN CN201710485195.7A patent/CN107326323A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1542427A (en) * | 2003-11-06 | 2004-11-03 | 上海交通大学 | Loadable sampling and gas extracting apparatus for controlling atmosphere furnace |
| CN1560318A (en) * | 2004-03-04 | 2005-01-05 | 上海交通大学 | Apparatus of dynamic testing controlling for carbon potential of vacuum furnace |
| CN1587976A (en) * | 2004-10-14 | 2005-03-02 | 上海交通大学 | Real time detecting method for gas carburization three dimension concentration field of complicate shape workpiece |
| CN101187002A (en) * | 2007-12-29 | 2008-05-28 | 江苏丰东热技术股份有限公司 | Carburizing process for reducing internal oxidation |
| CN104865196A (en) * | 2014-09-09 | 2015-08-26 | 浙江迪特高强度螺栓有限公司 | Measuring method of carbon content inside mesh belt heat treatment furnace |
| CN204405471U (en) * | 2015-03-16 | 2015-06-17 | 山推工程机械股份有限公司 | Carbon protective valve determined by a kind of cementing furnace steel foil |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: Nanxiang Road 224100 Jiangsu province Yancheng City Dafeng Economic Development Zone No. 333 Applicant after: JIANGSU FENGDONG HEAT TREATMENT AND SURFACE MODIFICATION ENGINEERING AND TECHNOLOGY RESEARCH CO., LTD. Address before: Nanxiang Road 224100 Jiangsu province Dafeng Yancheng City District No. 333 Applicant before: JIANGSU FENGDONG HEAT TREATMENT AND SURFACE MODIFICATION ENGINEERING AND TECHNOLOGY RESEARCH CO., LTD. |
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| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171107 |