CN107868928A - A kind of processing method for improving stainless steel mould corrosion resistance - Google Patents
A kind of processing method for improving stainless steel mould corrosion resistance Download PDFInfo
- Publication number
- CN107868928A CN107868928A CN201711149386.2A CN201711149386A CN107868928A CN 107868928 A CN107868928 A CN 107868928A CN 201711149386 A CN201711149386 A CN 201711149386A CN 107868928 A CN107868928 A CN 107868928A
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- CN
- China
- Prior art keywords
- stainless steel
- steel mould
- corrosion resistance
- processing method
- polishing
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Classifications
-
- 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
- C23C8/08—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 only one element being applied
- C23C8/24—Nitriding
- C23C8/26—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
- C21D1/18—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
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/60—Aqueous agents
-
- 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
- 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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F17/00—Multi-step processes for surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by subclass C21D or C22F or class C25
Abstract
The invention mainly relates to mold machining technology field, discloses a kind of processing method for improving stainless steel mould corrosion resistance, including：Cleaning, polishing, quenching, leaching nitrogen, packaging；Method is simple, easy to operation, and the stainless steel mould after casting is cleaned by ultrasonic, goes the removal of impurity, can carry out uniform treatment to stainless steel mould, improve the corrosion resistance of mould；First cryogenic freezing cryogenic polishing again after cleaning, the metallic luster of stainless steel mould is kept, reduce polishing difficulty, roughness is down to 0.09 μm, improve processing efficiency；Quickly rise temperature, then be placed in Diammonium phosphate (DAP) solution and quenched after polishing, diaphragm is formed in die surface, improves the decay resistance of mould.
Description
Technical field
The invention mainly relates to mold machining technology field, more particularly to a kind of place for improving stainless steel mould corrosion resistance
Reason method.
Background technology
In mould industry production being molded, being blow molded, extruding, die casting or obtain institute the methods of forging forming, smelting, punching press
The various moulds and instrument of product are needed, are the instruments for formed article；Mold use frequency is higher, and desired precision
It is higher, it is therefore desirable to which that mould has higher corrosion resistance, to ensure to be formed the size and performance of article；Use at present
Stainless steel mould be a kind of common metal mould, corrosion is not easy in dry air, but to the tolerance level of chemical reagent
It is relatively low, corrosion easily occurs, precision declines, it is necessary to often be cleared up, and process is cumbersome, hence it is evident that reduces production efficiency.
The content of the invention
The defects of in order to make up prior art, it is an object of the invention to provide a kind of raising stainless steel mould corrosion resistance
Processing method.
A kind of processing method for improving stainless steel mould corrosion resistance, comprises the following steps：
（1）Cleaning：Stainless steel mould after casting is placed in detergent solution, in 31 ~ 33kHz ultrasounds 20 ~ 25 minutes, obtained clearly
Wash part；
（2）Polishing：By cleaning part freeze 20 ~ 24 hours, be placed in ultrasonic polishing machine, in 8 ~ 10 DEG C, 28 ~ 30kHz polishing 40 ~
45 minutes, clean, obtain polished part；
（3）Quenching：Polished part is subject to 3.2 ~ 3.4 DEG C/min and is heated to 400 ~ 450 DEG C, 70 ~ 80 minutes is incubated, is placed in quality
Concentration is to be quenched in 1.3 ~ 1.5% Diammonium phosphate (DAP) solution, is naturally cooling to room temperature, obtains quenching part；
（4）Soak nitrogen：Quenching part is placed in heating furnace, is passed through ammonia, temperature is heated to as 260 ~ 280 DEG C, is incubated 20 ~ 25 points
Clock, continue to be heated to temperature as 360 ~ 400 DEG C, be incubated 80 ~ 90 minutes, Temperature fall, nitrogen part must be soaked；
（5）Packaging：Oiling, packaging, obtains corrosion-resistant stainless steel mould finished product.
The step（2）Freezing, temperature be -33 ~ -31 DEG C.
The step（2）Polishing, polishing suspension is silica suspension.
The step（4）Heating, heated up with 1.6 ~ 1.8 DEG C/min.
The step（4）Ammonia, volume fraction in heating furnace is 2.4 ~ 2.6%.
Corrosion-resistant stainless steel mould finished product prepared by the processing method for improving stainless steel mould corrosion resistance.
It is an advantage of the invention that：The processing method provided by the invention for improving stainless steel mould corrosion resistance, method is simple,
It is easy to operation, the stainless steel mould after casting is cleaned by ultrasonic, goes the removal of impurity, stainless steel mould can uniformly be located
Reason, improve the corrosion resistance of mould；First cryogenic freezing cryogenic polishing again after cleaning, keep the metallic luster of stainless steel mould, drop
Low polishing difficulty, roughness is down to 0.09 μm, improve processing efficiency；Quickly rise temperature, then be placed in Diammonium phosphate (DAP) after polishing
Quenched in solution, form diaphragm in die surface, improve the decay resistance of mould；Quench and be passed through in backward heating furnace
Ammonia slowly carries out interim heating again, promotes ammonia to penetrate into mould, increases mould protective layer, improves the corrosion resistance of mould
Can, slow cooling again after nitriding, metallic crystal granularity is reduced, improve the intensity and hardness of mould, strengthen wearability, extend mould
Service life, save production cost.
Embodiment
Illustrate the present invention with specific embodiment below.
Embodiment 1
A kind of processing method for improving stainless steel mould corrosion resistance, comprises the following steps：
（1）Cleaning：Stainless steel mould after casting is placed in detergent solution, it is ultrasonic 20 minutes in 31kHz, obtain cleaning part；
（2）Polishing：Cleaning part is freezed 20 hours, temperature is -33 DEG C, is placed in ultrasonic polishing machine, polishing suspension is dioxy
SiClx suspension, polished 40 minutes in 8 DEG C, 28kHz, clean, obtain polished part；
（3）Quenching：Polished part is subject to 3.2 DEG C/min and is heated to 400 DEG C, is incubated 70 minutes, it is 1.3% to be placed in mass concentration
Quenched in Diammonium phosphate (DAP) solution, be naturally cooling to room temperature, obtain quenching part；
（4）Soak nitrogen：Quenching part is placed in heating furnace, is passed through ammonia, the volume fraction in heating furnace be 2.4%, with 1.6 DEG C/
Minute is heated up, and is heated to temperature as 260 DEG C, is incubated 20 minutes, is continued to be heated to temperature as 360 DEG C, is incubated 80 minutes, certainly
So cooling, must soak nitrogen part；
（5）Packaging：Oiling, packaging, obtains corrosion-resistant stainless steel mould finished product.
Corrosion-resistant stainless steel mould finished product prepared by the processing method for improving stainless steel mould corrosion resistance.
Embodiment 2
A kind of processing method for improving stainless steel mould corrosion resistance, comprises the following steps：
（1）Cleaning：Stainless steel mould after casting is placed in detergent solution, it is ultrasonic 23 minutes in 32kHz, obtain cleaning part；
（2）Polishing：Cleaning part is freezed 22 hours, temperature is -32 DEG C, is placed in ultrasonic polishing machine, polishing suspension is dioxy
SiClx suspension, polished 43 minutes in 9 DEG C, 29kHz, clean, obtain polished part；
（3）Quenching：Polished part is subject to 3.3 DEG C/min and is heated to 430 DEG C, is incubated 75 minutes, it is 1.4% to be placed in mass concentration
Quenched in Diammonium phosphate (DAP) solution, be naturally cooling to room temperature, obtain quenching part；
（4）Soak nitrogen：Quenching part is placed in heating furnace, is passed through ammonia, the volume fraction in heating furnace be 2.5%, with 1.7 DEG C/
Minute is heated up, and is heated to temperature as 270 DEG C, is incubated 23 minutes, is continued to be heated to temperature as 380 DEG C, is incubated 85 minutes, certainly
So cooling, must soak nitrogen part；
（5）Packaging：Oiling, packaging, obtains corrosion-resistant stainless steel mould finished product.
Corrosion-resistant stainless steel mould finished product prepared by the processing method for improving stainless steel mould corrosion resistance.
Embodiment 3
A kind of processing method for improving stainless steel mould corrosion resistance, comprises the following steps：
（1）Cleaning：Stainless steel mould after casting is placed in detergent solution, it is ultrasonic 25 minutes in 33kHz, obtain cleaning part；
（2）Polishing：Cleaning part is freezed 24 hours, temperature is -31 DEG C, is placed in ultrasonic polishing machine, polishing suspension is dioxy
SiClx suspension, polished 45 minutes in 10 DEG C, 30kHz, clean, obtain polished part；
（3）Quenching：Polished part is subject to 3.4 DEG C/min and is heated to 450 DEG C, is incubated 80 minutes, be placed in mass concentration for 1.3 ~
Quenched in 1.5% Diammonium phosphate (DAP) solution, be naturally cooling to room temperature, obtain quenching part；
（4）Soak nitrogen：Quenching part is placed in heating furnace, is passed through ammonia, the volume fraction in heating furnace be 2.6%, with 1.8 DEG C/
Minute is heated up, and is heated to temperature as 280 DEG C, is incubated 25 minutes, is continued to be heated to temperature as 400 DEG C, is incubated 90 minutes, certainly
So cooling, must soak nitrogen part；
（5）Packaging：Oiling, packaging, obtains corrosion-resistant stainless steel mould finished product.
Corrosion-resistant stainless steel mould finished product prepared by the processing method for improving stainless steel mould corrosion resistance.
Comparative example 1
Existing traditional stainless steel mould finished product.
The performance of embodiment and comparative example mould：
Each 8 of the stainless steel mould finished product of selection example and comparative example respectively, at normal temperatures and pressures, each group selects 2 respectively
The 6mol/L NaCl aqueous solution is placed in, selects 2 HCl/water solution for being placed in 6mol/L, selects 2 NaOH water for being placed in 6mol/L
In solution, there is the time corroded in observation each group stainless steel mould finished product, and selects 2 to be used for Surface testing, results averaged,
Embodiment and the performance of comparative example mould are shown in Table 1.
Table 1：The performance of embodiment and comparative example mould
| Project | Roughness/(μm) | Acidproof/(d) | Alkaline-resisting/(d) | Salt tolerant/(d) | Wearability/（mm3） |
| Embodiment 1 | 0.10 | 309 | 334 | 316 | 20 |
| Embodiment 2 | 0.09 | 311 | 337 | 319 | 19 |
| Embodiment 3 | 0.09 | 307 | 335 | 318 | 19 |
| Comparative example 1 | 0.27 | 204 | 219 | 216 | 42 |
Show from the result of table 1, the processing method of the raising stainless steel mould corrosion resistance of embodiment obtains corrosion-resistant stainless
Steel mold finished product, roughness is substantially small compared with comparative example, and acidproof, alkaline-resisting and salt tolerance is substantially strong compared with comparative example, the volume after friction
Loss amount is substantially small compared with comparative example, illustrates the processing method of raising stainless steel mould corrosion resistance provided by the invention and has very well
Treatment effect.
Claims (5)
1. a kind of processing method for improving stainless steel mould corrosion resistance, it is characterised in that comprise the following steps：
（1）Cleaning：Stainless steel mould after casting is placed in detergent solution, in 31 ~ 33kHz ultrasounds 20 ~ 25 minutes, obtained clearly
Wash part；
（2）Polishing：By cleaning part freeze 20 ~ 24 hours, be placed in ultrasonic polishing machine, in 8 ~ 10 DEG C, 28 ~ 30kHz polishing 40 ~
45 minutes, clean, obtain polished part；
（3）Quenching：Polished part is subject to 3.2 ~ 3.4 DEG C/min and is heated to 400 ~ 450 DEG C, 70 ~ 80 minutes is incubated, is placed in quality
Concentration is to be quenched in 1.3 ~ 1.5% Diammonium phosphate (DAP) solution, is naturally cooling to room temperature, obtains quenching part；
（4）Soak nitrogen：Quenching part is placed in heating furnace, is passed through ammonia, temperature is heated to as 260 ~ 280 DEG C, is incubated 20 ~ 25 points
Clock, continue to be heated to temperature as 360 ~ 400 DEG C, be incubated 80 ~ 90 minutes, Temperature fall, nitrogen part must be soaked；
（5）Packaging：Oiling, packaging, obtains corrosion-resistant stainless steel mould finished product.
2. the processing method of stainless steel mould corrosion resistance is improved according to claim 1, it is characterised in that the step
（2）Freezing, temperature be -33 ~ -31 DEG C.
3. the processing method of stainless steel mould corrosion resistance is improved according to claim 1, it is characterised in that the step
（2）Polishing, polishing suspension is silica suspension
The processing method of stainless steel mould corrosion resistance is improved according to claim 1, it is characterised in that the step（4）
Heating, heated up with 1.6 ~ 1.8 DEG C/min.
4. the processing method of stainless steel mould corrosion resistance is improved according to claim 1, it is characterised in that the step
（4）Ammonia, volume fraction in heating furnace is 2.4 ~ 2.6%.
5. a kind of any one of claim 1 ~ 5 processing method for improving stainless steel mould corrosion resistance prepare it is corrosion-resistant not
Become rusty steel mold finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711149386.2A CN107868928A (en) | 2017-11-18 | 2017-11-18 | A kind of processing method for improving stainless steel mould corrosion resistance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711149386.2A CN107868928A (en) | 2017-11-18 | 2017-11-18 | A kind of processing method for improving stainless steel mould corrosion resistance |
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| CN107868928A true CN107868928A (en) | 2018-04-03 |
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| CN201711149386.2A Pending CN107868928A (en) | 2017-11-18 | 2017-11-18 | A kind of processing method for improving stainless steel mould corrosion resistance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110158022A (en) * | 2019-05-17 | 2019-08-23 | 安徽省汉甲机电设备科技有限公司 | A method of improving carbon steel anticorrosion corrosion peculiar to vessel |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102343544A (en) * | 2011-11-22 | 2012-02-08 | 山东理工大学 | Ultralow temperature polishing machine |
| CN102877070A (en) * | 2012-06-14 | 2013-01-16 | 浙江吉利汽车研究院有限公司杭州分公司 | Surface compound treatment method for steel mould |
-
2017
- 2017-11-18 CN CN201711149386.2A patent/CN107868928A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102343544A (en) * | 2011-11-22 | 2012-02-08 | 山东理工大学 | Ultralow temperature polishing machine |
| CN102877070A (en) * | 2012-06-14 | 2013-01-16 | 浙江吉利汽车研究院有限公司杭州分公司 | Surface compound treatment method for steel mould |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110158022A (en) * | 2019-05-17 | 2019-08-23 | 安徽省汉甲机电设备科技有限公司 | A method of improving carbon steel anticorrosion corrosion peculiar to vessel |
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Application publication date: 20180403 |
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