CN106148648B - A kind of 3Cr13 martensitic stain less steels with excellent anticorrosive performance - Google Patents
A kind of 3Cr13 martensitic stain less steels with excellent anticorrosive performance Download PDFInfo
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- CN106148648B CN106148648B CN201510130320.3A CN201510130320A CN106148648B CN 106148648 B CN106148648 B CN 106148648B CN 201510130320 A CN201510130320 A CN 201510130320A CN 106148648 B CN106148648 B CN 106148648B
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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 24
- 229910000734 martensite Inorganic materials 0.000 title claims abstract description 22
- 238000012545 processing Methods 0.000 claims abstract description 37
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 34
- 239000010959 steel Substances 0.000 claims abstract description 34
- 238000010438 heat treatment Methods 0.000 claims abstract description 26
- 238000010791 quenching Methods 0.000 claims abstract description 13
- 230000000171 quenching effect Effects 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 150000003839 salts Chemical class 0.000 claims abstract description 6
- 238000009413 insulation Methods 0.000 claims abstract description 5
- 238000010792 warming Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910001566 austenite Inorganic materials 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims 1
- 230000000717 retained effect Effects 0.000 claims 1
- 238000002791 soaking Methods 0.000 claims 1
- 229910001105 martensitic stainless steel Inorganic materials 0.000 abstract 1
- 229920003023 plastic Polymers 0.000 description 28
- 239000004033 plastic Substances 0.000 description 28
- 239000000243 solution Substances 0.000 description 13
- 238000005260 corrosion Methods 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 7
- 239000011651 chromium Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000010287 polarization Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 241000370738 Chlorion Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229940075397 calomel Drugs 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- ZOMNIUBKTOKEHS-UHFFFAOYSA-L dimercury dichloride Chemical compound Cl[Hg][Hg]Cl ZOMNIUBKTOKEHS-UHFFFAOYSA-L 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002848 electrochemical method Methods 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical class [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000329 molecular dynamics simulation Methods 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
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Abstract
The present invention relates to a kind of 3Cr13 martensitic stain less steels for having excellent mechanical property and decay resistance concurrently, and it is prepared by following processing step：First, the 3Cr13 steel is subjected to solution treatment in electrothermal furnace, the actual conditions of the solution treatment is, 250 DEG C of preheatings are warming up to 300 360 DEG C/h heating rate, 1,120 1140 DEG C for the treatment of temperature is heated to 100 150 DEG C/h heating rate again, the 2h of processing time 1.5, and high-purity Ar gas is passed through when handling, Ar pressure is 60 80MPa；Then, Quenching Treatment is carried out to 3Cr13 steel, specifically with 0.8 1.0 DEG C/s cooling velocity, the martensitic stain less steel is cooled to less than 220 DEG C rapidly；Then, carry out reallocation processing to 3Cr13 steel, the 3Cr13 steel after quenching is specifically inserted to rapidly 400 420 DEG C of salt bath processing environment and is heated to be incubated 3 5h, is then air-cooled to room temperature；Finally, temper is carried out to 3Cr13 steel, is specifically heated to that 330 350 DEG C of 2 3h of insulation carry out temper and water cooling is to room temperature with 150 200 DEG C/h heating rates.
Description
Technical field
The present invention relates to the technical field of plastic die steel, particularly a kind of Technology for Heating Processing of plastic die steel, especially
It is a kind of 3Cr13 martensitic stain less steels and its Technology for Heating Processing.
Background technology
The polymer plastic materials such as polyvinyl chloride, fire retardant ABS can decomposite the harmful elements such as Cl in forming process, right
Mold cavity has stronger corrosivity, causes spot corrosion, stress corrosion etc. to be failed, and then reduces die life and finished surface
Quality.
The methods of using molecular dynamics, first principle from micro-scale, has been calculated iron carbon clusters in Cr elements
Addition under can reduce absorption to chlorion, namely the carbide of common two kinds of configurations of M23C6, M3C is not easy to adsorb chlorine
Ion, but M23C6 carbide can cause its surrounding matrix " chromium depleted ", so as to cause spot corrosion；And M3C carbide then will not be right
" chromium depleted " influences too much.
Thus, how make it that the carbide in the tissue of plastic die steel exists in the form of M3C as far as possible, and avoid
A large amount of appearance of M23C6 carbide, have great importance for the decay resistance for improving plastic die steel.
The content of the invention
It is an object of the invention to provide a kind of Technology for Heating Processing of plastic die steel, to improve the resistance to of plastic die steel
Corrosive nature.
Heretofore described plastic die steel is 3Cr13 martensitic stain less steels, and it have passed through forging, hot rolling and nodularization and moves back
Fire.
The Technology for Heating Processing is specially：
First, the plastic die steel being subjected to solution treatment in electrothermal furnace, the actual conditions of the solution treatment is,
250 DEG C of preheatings are warming up to 300-360 DEG C/h heating rate, then processing temperature is heated to 100-150 DEG C/h heating rate
High-purity Ar gas is passed through when spending 1120-1140 DEG C, processing time 1.5-2h, and handling, Ar pressure is 60-80MPa；
Then, Quenching Treatment is carried out to the plastic die steel, specifically with 0.8-1.0 DEG C/s cooling velocity, rapidly
The plastic die steel is cooled to less than 220 DEG C；
Then, reallocation processing is carried out to the plastic die steel, specifically rapidly puts the plastic die steel after quenching
Enter 350-380 DEG C of salt bath processing environment to be heated to be incubated 3-5h, be then air-cooled to room temperature；
Finally, temper is carried out to plastic die steel, 330- is specifically heated to 150-200 DEG C/h heating rates
350 DEG C of insulation 2-3h carry out temper and water cooling is to room temperature.
Plastic die steel after the processing of the application Technology for Heating Processing, has excellent structure property, can be right well
M23C6 carbide is controlled so that the carbide in plastic die steel exists substantially in the form of M3C, so that mould
Steel has excellent mechanical property and decay resistance concurrently.
Brief description of the drawings
Fig. 1 is diffracting spectrum of the 3Cr13 martensitic stain less steels after different solid solution temperatures；
Fig. 2 is dynamic potential polarization curve of the 3Cr13 martensitic stain less steels after different solid solution temperatures；
Fig. 3 is diffracting spectrum of the 3Cr13 martensitic stain less steels after different reallocation treatment temperatures；
Fig. 4 is dynamic potential polarization curve of the 3Cr13 martensitic stain less steels after different reallocation treatment temperatures.
Embodiment
Embodiment 1.
First, the plastic die steel being subjected to solution treatment in electrothermal furnace, the actual conditions of the solution treatment is,
250 DEG C of preheatings are warming up to 300-360 DEG C/h heating rate, then processing temperature is heated to 100-150 DEG C/h heating rate
High-purity Ar gas is passed through when spending 1120-1140 DEG C, processing time 1.5-2h, and handling, Ar pressure is 60-80MPa；
Then, Quenching Treatment is carried out to plastic die steel, specifically with 0.8-1.0 DEG C/s cooling velocity, rapidly by institute
State plastic die steel and be cooled to less than 220 DEG C；
Then, reallocation processing is carried out to plastic die steel, the plastic die steel after quenching is specifically inserted 350 rapidly
DEG C salt bath processing environment be heated to be incubated 3h, be then air-cooled to room temperature；
Finally, temper is carried out to plastic die steel, 340 DEG C of insulations is specifically heated to 180 DEG C/h heating rates
2h carries out temper and water cooling is to room temperature.
Embodiment 2-3 and comparative example 1-3 specific processing parameter is referring to table 1（Unlisted expression and the phase of embodiment 1
Together）：
Corrosion resistance test result under the conditions of 1 different solution treatment of table
| No. | Treatment temperature（℃） | Processing time（h） | Processing pressure（MPa） | Pitting potential（mV） |
| 1 | 1120 | 1.5 | 60 | 175.36 |
| 2 | 1130 | 1.8 | 70 | 180.25 |
| 3 | 1140 | 2 | 80 | 173.44 |
| 1* | 980 | 1.8 | 70 | 75.42 |
| 2* | 1030 | 1.8 | 70 | 108.27 |
| 3* | 1080 | 1.8 | 70 | 162.15 |
Corrosion resistance test uses electrochemical method, and using Corrtest CS350 type electrochemical workstations, research material exists
Containing Cl-Electrochemical corrosion performance in the aqueous solution.Electrochemistry experiment uses three-electrode system, using Pt electrodes as to electrode, calomel
Electrode is reference electrode, and stainless steel curved beam is working electrode.Tested media selects the 3.5%NaCl aqueous solution, and working electrode is processed into
For 10 × 3 mm disk sample, and approved sample is carried out using epoxy resin.0.5h cathodic polarizations are carried out in test process first
To remove due to the different influence of stainless steel surfaces passivation membrane stage caused by standing time difference.0.5h open circuit electricity is carried out afterwards
Position measurement, to obtain the corrosion potential of stainless steel in media as well（OCP）, and using this current potential as zero point, carrying out alternating-current magnitude is
10mV, frequency range 10-2Hz ~ 105Hz AC impedance（EIS）Spectrometry, to obtain passivating film of the material under corrosion potential
Characteristic；Afterwards, with 0.166 mV/s sweep speed, in -0.5V（vs. OCP）~1V（vs. OCP）In the range of carry out electrokinetic potential
Polarization test, and be set in when current density is higher than 0.1 μ A/cm2 and terminate to measure, now corresponding potential value is material
Pitting potential.
By Fig. 1 it can be found that 3Cr13 martensitic stain less steels after heat treatment have the appearance of martensite peak position.Wherein pass through
After 1130 DEG C of solution treatment and quenching, there is obvious austenite peak, and after 980 DEG C and 1030 DEG C of solution treatment and quenching,
Then there is the peak position of obvious rich Cr types M23C6 carbide.
It is not difficult to find out by table 1 and Fig. 2, embodiment 1-3 has due to having carried out suitable solution treatment, decay resistance
Excellent decay resistance, although and comparative example 1-3 also implement the present invention Technology for Heating Processing, due to its solution treatment temperature
Spend and improper, decay resistance is difficult to reach satisfied effect.Meanwhile applicant also found that further improve solution treatment
Temperature, the decay resistance for improving 3Cr13 martensitic stain less steels, which there will be no, to be obviously improved, and can be caused on the contrary to a certain degree
Decline.It is therefore preferable that the temperature of solution treatment is 1120-1140 DEG C, processing time 1.5-2h, and it is passed through when handling high-purity
Ar gas, Ar pressure is 60-80MPa.
Embodiment 4.
First, the plastic die steel being subjected to solution treatment in electrothermal furnace, the actual conditions of the solution treatment is,
250 DEG C of preheatings are warming up to 330 DEG C/h heating rate, then 1120 DEG C for the treatment of temperature is heated to 120 DEG C/h heating rate,
Processing time 1.5h, and high-purity Ar gas is passed through when handling, Ar pressure is 60MPa；
Then, Quenching Treatment is carried out to the plastic die steel, specifically with 1.0 DEG C/s cooling velocity, rapidly by institute
State plastic die steel and be cooled to 210 DEG C；
Then, reallocation processing is carried out to the plastic die steel, specifically rapidly puts the plastic die steel after quenching
Enter 350 DEG C of salt bath processing environment to be heated to be incubated 3h, be then air-cooled to room temperature；
Finally, temper is carried out to plastic die steel, 340 DEG C of insulations is specifically heated to 180 DEG C/h heating rates
2h carries out temper and water cooling is to room temperature.
Embodiment 5 and comparative example 4-8 specific processing parameter are referring to table 2（Unlisted expression is same as Example 4）：
EIS fitting result fitting results under the different reallocation treatment conditions of table 2
| No. | Treatment temperature（℃） | Processing time（h） | Rs/Ω∙cm2 | Rp/kΩ∙cm2 | Paralympic content（vol.%） |
| 4 | 350 | 3 | 2.946 | 174.75 | 11.45 |
| 5 | 380 | 5 | 2..917 | 170.85 | 12.0 |
| 4* | 300 | 4 | 2.125 | 152.17 | 5.46 |
| 5* | 400 | 4 | 2.908 | 153.69 | 13.18 |
| 6* | 450 | 4 | 2.213 | 161.43 | 8.27 |
| 7* | 500 | 4 | 2.318 | 125.13 | ≈3 |
| 8* | It is untreated | - | 1.976 | 175.94 | <3 |
By table 2 and Fig. 3 it can be found that 3Cr13 martensitic stain less steels after heat treatment have the appearance of austenite peak position.Wherein
Maximum is reached at 450 DEG C, but decay resistance now decreases on the contrary.
It is not difficult to find out by table 2 and Fig. 4, embodiment 4-5 has due to having carried out suitable reallocation processing, decay resistance
Have excellent decay resistance, although and comparative example 5-8 also implement the present invention Technology for Heating Processing, at its reallocation
Reason temperature is simultaneously improper, and its decay resistance is all much worse than undressed quenching state.
Embodiment described above only expresses embodiments of the present invention, and its description is more specific and detailed, but can not
Therefore it is interpreted as the limitation to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art,
Without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection model of the present invention
Enclose.
Claims (4)
1. a kind of 3Cr13 martensitic stain less steels for having excellent mechanical property and decay resistance concurrently, it is characterised in that by such as
Lower Technology for Heating Processing step：
First, 3Cr13 martensitic stain less steels being subjected to solution treatment in electrothermal furnace, the actual conditions of the solution treatment is,
250 DEG C of preheatings are warming up to 300-360 DEG C/h heating rate, then processing temperature is heated to 100-150 DEG C/h heating rate
High-purity Ar gas is passed through when spending 1120-1140 DEG C, processing time 1.5-2h, and handling, Ar pressure is 60-80MPa；
Then, Quenching Treatment is carried out to 3Cr13 martensitic stain less steels, specifically with 0.8-1.0 DEG C/s cooling velocity, rapidly will
It is cooled to less than 220 DEG C；
Then, reallocation processing is carried out to 3Cr13 martensitic stain less steels, specifically rapidly by the 3Cr13 martensites after quenching not
The salt bath processing environment that rust steel inserts 350-380 DEG C is heated to be incubated 3-5h, is then air-cooled to room temperature；
Finally, temper is carried out to 3Cr13 martensitic stain less steels, be specifically heated to 150-200 DEG C/h heating rates
330-350 DEG C of insulation 2-3h carries out temper and water cooling is to room temperature；
Wherein, the content of retained austenite is 11.5-12vol.% in the 3Cr13 martensitic stain less steels after heat treatment.
2. 3Cr13 martensitic stain less steels according to claim 1, it is characterised in that：The treatment temperature of the solution treatment
For 1130 DEG C, processing time 1.8h.
3. 3Cr13 martensitic stain less steels according to claim 1, it is characterised in that：The pressure of the solution treatment is
70MPa。
4. 3Cr13 martensitic stain less steels according to claim 1, it is characterised in that：The salt bath temperature of the reallocation processing
Spend for 360 DEG C, soaking time 4h.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1664153A (en) * | 2005-03-17 | 2005-09-07 | 上海材料研究所 | Anticorrosion and antiwear martensitic stainless steel and its production method and use |
| CN101205592A (en) * | 2006-12-19 | 2008-06-25 | 中国科学院金属研究所 | Martensitic antibiotic stainless steel and thermal treatment method thereof |
| EP1739199B1 (en) * | 2005-06-30 | 2009-06-24 | OUTOKUMPU, Oyj | Martensitic stainless steel |
| CN104561482A (en) * | 2015-01-22 | 2015-04-29 | 机械科学研究总院先进制造技术研究中心 | Heat treatment technology for 3Cr13 martensite stainless steel |
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2015
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1664153A (en) * | 2005-03-17 | 2005-09-07 | 上海材料研究所 | Anticorrosion and antiwear martensitic stainless steel and its production method and use |
| EP1739199B1 (en) * | 2005-06-30 | 2009-06-24 | OUTOKUMPU, Oyj | Martensitic stainless steel |
| CN101205592A (en) * | 2006-12-19 | 2008-06-25 | 中国科学院金属研究所 | Martensitic antibiotic stainless steel and thermal treatment method thereof |
| CN104561482A (en) * | 2015-01-22 | 2015-04-29 | 机械科学研究总院先进制造技术研究中心 | Heat treatment technology for 3Cr13 martensite stainless steel |
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