CN104294208A - Low-temperature salt bath treating agent - Google Patents
Low-temperature salt bath treating agent Download PDFInfo
- Publication number
- CN104294208A CN104294208A CN201410522107.2A CN201410522107A CN104294208A CN 104294208 A CN104294208 A CN 104294208A CN 201410522107 A CN201410522107 A CN 201410522107A CN 104294208 A CN104294208 A CN 104294208A
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- China
- Prior art keywords
- salt bath
- salt
- treating agent
- temperature
- low
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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
- C23C8/40—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 liquids, e.g. salt baths, liquid suspensions
- C23C8/42—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 liquids, e.g. salt baths, liquid suspensions only one element being applied
- C23C8/48—Nitriding
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cosmetics (AREA)
Abstract
The invention discloses a low-temperature salt bath treating agent. The low-temperature salt bath treating agent comprises the following components in percentage by mass: 20-30% of urea, 25-35% of soda ash, 10-20% of potassium carbonate, 8-15% of lithium carbonate, 3-8% of Me2SO4 and the balance of additives, wherein Me is a metal cation and the additive is an oxide or a chloride of a rare earth element. According to the low-temperature salt bath treating agent, the formula of the raw materials is adjusted, the melting point of the salt bath is reduced to be 390-450 DEG C, a material of which the tempering temperature is 430-500 DEG C or high-precision-requirement and complex-shape or slender rod-type parts can be treated and the application range of the salt bath surface treating agent is greatly extended; in addition, by reducing the application temperature of the treating agent, the energy consumption can be also significantly reduced.
Description
Technical field
The invention belongs to metal surface overlay film field, relate to metallic surface salt bath process, particularly a kind of salt bath treatment agent being applicable to cold condition.
Background technology
Salt bath process is purposes process for treating surface very widely, salt bath treatment agent has conclusive impact to product treatment effect, but existing salt bath treatment agent is generally containing prussiate, has very strong toxicity, not only damage workman healthy, and easy environmental pollution.For solving this problem, publication number be 2009101572613 Chinese patent application disclose a kind of take urea as nitrogenous source, the carbanion salt bath treatment agent that is carbon source, not containing prussiate in this salt bath treatment agent raw material, effectively reduce treatment temp, essentially eliminate the potential threat of environment, but still its treatment temp is higher than 530 DEG C, the processing requirements of the process lower part of tempering temperature or slender rod type part can not be met.
Therefore, need to develop and be a kind ofly applicable to the low temperature salt-bath treatment agent of tempering temperature lower than 530 DEG C or slender rod type part.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of low temperature salt-bath treatment agent.
For achieving the above object, the invention provides following technical scheme:
A kind of low temperature salt-bath treatment agent, is made up of following: urea: 20-30% by mass; Soda ash: 25-35%; Salt of wormwood: 10-20%; Quilonum Retard: 8-15%; Me
2sO
4: 3-8%; Surplus is additive; Wherein: Me is metallic cation.
Preferred as low temperature salt-bath treatment agent of the present invention, the content of described urea is 25-28%, and described soda content is 28-32%, and the content of described salt of wormwood is 13-17%, and the content of described Quilonum Retard is 11-13%, described Me
2sO
4content be 5-6.5%.
Preferred as low temperature salt-bath treatment agent of the present invention, described additive is oxide compound or the muriate of rare earth element.
Beneficial effect of the present invention is:
The present invention adjusts composition of raw materials, and the fusing point of salt bath is reduced to 390-450 DEG C, can be that the material of 430-500 DEG C or the slender rod type part higher to accuracy requirement process to tempering temperature, greatly extend the use range of salt bath treatment agent; In addition, the present invention, by reducing treatment agent temperature, significantly can also reduce energy consumption.
Accompanying drawing explanation
In order to make object of the present invention, technical scheme and beneficial effect clearly, the invention provides following accompanying drawing and being described:
Fig. 1 is product shape appearance figure after the process of embodiment 1 salt bath;
Fig. 2 is product shape appearance figure after the process of embodiment 2 salt bath;
Fig. 3 is product shape appearance figure after the process of embodiment 3 salt bath.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
Following examples will disclose a kind of low temperature salt-bath treatment agent, composed of the following components by mass, urea: 20-30%; Soda ash: 25-35%; Salt of wormwood: 10-20%; Quilonum Retard: 8-15%; Me
2sO
4: 3-8%; Surplus is additive (each component total amount is 100%); Wherein: Me is metallic cation; Described additive is oxide compound or the muriate of rare earth element.
Embodiment 1:
The salt bath treatment process of the present embodiment, comprises the following steps:
1) sample: it is high ferro Wheel set detecting press strip that the present embodiment gets pending part, and its length is 1.5 meters, and material is Cr12MoV;
2) product cleaning: by step 1) press strip be placed in ultrasonic cleaning agent and clean, remove surface and oil contaminant and rusty stain;
3) preheating: the sample after cleaning is heated to 380 DEG C of insulations 30 minutes;
4) salt-bath nitriding: the press strip of preheating is added in salt bath solution and carries out salt-bath nitriding, nitriding temperature is 530 DEG C; Nitridation time is 3h;
5) liquid oxidizing: the press strip after nitriding treatment is carried out liquid oxidizing process.
In the present embodiment: the composition of nitridation salt body lotion is: urea: 28%; Soda ash: 28%; Salt of wormwood: 17%; Quilonum Retard: 12%; Me
2sO
4: 5%; Surplus is additive; Wherein: Me is metallic cation (as sodium ion, potassium ion); Described additive is oxide compound and the muriate of rare earth element.
Embodiment 2:
The salt bath treatment process of the present embodiment, comprises the following steps:
1) sample: it is chemical machinery wear ring that the present embodiment gets pending part, and its diameter is 260-428mm, and thickness is 5-20mm, has step, and material is 304 stainless steels;
2) product cleaning: by step 1) sealing member be placed in ultrasonic cleaning agent and clean, remove surface and oil contaminant and rusty stain;
3) preheating: the sealing member after cleaning is heated to 370 DEG C of insulations 30 minutes;
4) salt-bath nitriding: the sealing member of preheating is added in salt bath solution and carries out salt-bath nitriding, nitriding temperature is 520 DEG C; Nitridation time is 3H;
5) liquid oxidizing: the sealing member after nitriding treatment is carried out liquid oxidizing process.
In the present embodiment: the composition of nitridation salt body lotion is: urea: 20%; Soda ash: 35%; Salt of wormwood: 10%; Quilonum Retard: 15%; Me
2sO
4: 3%; Surplus is additive; Wherein: Me is metallic cation; Described additive is the oxide compound of rare earth element.
Embodiment 3:
The salt bath treatment process of the present embodiment, comprises the following steps:
1) sample: it is steamer nozzle ring that the present embodiment gets pending part, and its diameter is 460mm, height 50mm, thickness 6mm, material is Cr12MoV;
2) product cleaning: by step 1) nozzle ring be placed in supersonic cleaning machine and clean, remove surface and oil contaminant and rusty stain;
3) preheating: the nozzle ring after cleaning is heated to 400 DEG C of insulations 30 minutes;
4) salt-bath nitriding: the nozzle ring of preheating is added in salt bath solution and carries out salt-bath nitriding, nitriding temperature is 520 DEG C; Nitridation time is 2.5h;
5) liquid oxidizing: the nozzle ring after nitriding treatment is carried out liquid oxidizing process.
In the present embodiment: the composition of nitridation salt body lotion is: urea: 30%; Soda ash: 25%; Salt of wormwood: 20%; Quilonum Retard: 15%; Me
2sO
4: 3%; Surplus is additive; Wherein: Me is metallic cation; Described additive is the muriate of rare earth element.
In above-described embodiment, liquid oxidizing step adopts this area ordinary method.
Fig. 1-3 is respectively the rear product photo of embodiment 1-3 process, and can find out that after adopting the process of above-described embodiment salt bath treatment process, product surface is highly polished, top layer is combined well with matrix.
As can be seen from above-described embodiment, after the present invention adjusts formula, the fusing point of salt bath is reduced to 390-450 DEG C, and salt bath treatment effect is enhanced on the contrary, greatly extends the use range of salt bath treatment agent.
What finally illustrate is, above preferred embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although by above preferred embodiment to invention has been detailed description, but those skilled in the art are to be understood that, various change can be made to it in the form and details, and not depart from claims of the present invention limited range.
Claims (3)
1. a low temperature salt-bath treatment agent, is characterized in that, is made up of by mass: urea: 20-30% following; Soda ash: 25-35%; Salt of wormwood: 10-20%; Quilonum Retard: 8-15%; Me
2sO
4: 3-8%; Surplus is additive; Wherein: Me is metallic cation.
2. low temperature salt-bath treatment agent according to claim 1, it is characterized in that: the content of described urea is 25-28%, and described soda content is 28-32%, the content of described salt of wormwood is 13-17%, and the content of described Quilonum Retard is 11-13%, described Me
2sO
4content be 5-6.5%.
3. low temperature salt-bath treatment agent according to claim 1, is characterized in that: described additive is oxide compound or the muriate of rare earth element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410522107.2A CN104294208A (en) | 2014-09-30 | 2014-09-30 | Low-temperature salt bath treating agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410522107.2A CN104294208A (en) | 2014-09-30 | 2014-09-30 | Low-temperature salt bath treating agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104294208A true CN104294208A (en) | 2015-01-21 |
Family
ID=52314154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410522107.2A Pending CN104294208A (en) | 2014-09-30 | 2014-09-30 | Low-temperature salt bath treating agent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104294208A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106244982A (en) * | 2016-08-23 | 2016-12-21 | 吴忠仪表有限责任公司 | A kind of process the rare earth salt bath of austenitic stainless steel and preparation method and application for low temperature nitride |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1080331A (en) * | 1992-06-17 | 1994-01-05 | 湖南汽车车桥厂 | A kind of method of rare earth catalytic diffusion salt-bath anti-corrosion nitriding |
| CN101580925A (en) * | 2009-07-06 | 2009-11-18 | 青岛张氏机械有限公司 | Piston rod salt-bath treatment nitridizing agent |
| CN102220552A (en) * | 2011-06-07 | 2011-10-19 | 四川大学 | Nitriding salt for low-temperature salt-bath nitriding |
| CN102392212A (en) * | 2011-11-15 | 2012-03-28 | 西华大学 | Low-temperature nitriding nitride salt |
-
2014
- 2014-09-30 CN CN201410522107.2A patent/CN104294208A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1080331A (en) * | 1992-06-17 | 1994-01-05 | 湖南汽车车桥厂 | A kind of method of rare earth catalytic diffusion salt-bath anti-corrosion nitriding |
| CN101580925A (en) * | 2009-07-06 | 2009-11-18 | 青岛张氏机械有限公司 | Piston rod salt-bath treatment nitridizing agent |
| CN102220552A (en) * | 2011-06-07 | 2011-10-19 | 四川大学 | Nitriding salt for low-temperature salt-bath nitriding |
| CN102392212A (en) * | 2011-11-15 | 2012-03-28 | 西华大学 | Low-temperature nitriding nitride salt |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106244982A (en) * | 2016-08-23 | 2016-12-21 | 吴忠仪表有限责任公司 | A kind of process the rare earth salt bath of austenitic stainless steel and preparation method and application for low temperature nitride |
| CN106244982B (en) * | 2016-08-23 | 2018-09-14 | 吴忠仪表有限责任公司 | A kind of rare earth salt bath and preparation method and application for low temperature nitride processing austenitic stainless steel |
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Application publication date: 20150121 |
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