CN1025226C - Rare earth catalytic ion S, N, C co-osmosizing agent and its technology - Google Patents
Rare earth catalytic ion S, N, C co-osmosizing agent and its technology Download PDFInfo
- Publication number
- CN1025226C CN1025226C CN 92114422 CN92114422A CN1025226C CN 1025226 C CN1025226 C CN 1025226C CN 92114422 CN92114422 CN 92114422 CN 92114422 A CN92114422 A CN 92114422A CN 1025226 C CN1025226 C CN 1025226C
- Authority
- CN
- China
- Prior art keywords
- rare earth
- mixed solution
- alcohols
- ammonia
- ethanol
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The present invention belongs to the field of metal chemical heat treatment, and is one kind of co-permeating agent for RE ion, S, N and C and its technological process. The invention aims to accelerate the penetration rate of ion multicomponent co-penetration by utilizing the chemical activity of rare earth elements and improve the comprehensive mechanical property of a processed workpiece. The penetrant of the invention comprises ammonia, a mixed solution I consisting of methanol and alcohol rare earth, and a mixed solution II consisting of ethanol, carbon disulfide and alcohol rare earth. And (3) mixing the ammonia gas under positive pressure and the mixed solution I and II under negative pressure, and introducing the mixed solution into a vacuum container with a direct-current electric field to fully ionize and bombard the surface of a workpiece placed on a cathode. The invention is mainly used for surface treatment of structural steel and die steel workpieces.
Description
The invention belongs to metallochemistry thermal treatment, is a kind of rare earth ion sulphur, nitrogen, carbon co-cementation agent and technology.
Ion sulphur, nitrogen, carbon multiple permeation can significantly improve the iron and steel friction condition of part in addition, improve wear resistance, anti-attrition, seizure resistance and the fatigue strength of other part, and its penetration enhancer mainly is made up of ammonia, ethanol, dithiocarbonic anhydride or other sulfocompound.As 7～16 pages of China's " metal heat treatmet " 1981 6 phases and 1988 2 phases 3～9 pages of disclosed ion sulphur, nitrogen, carbon co-cementation agent be exactly to form by above-mentioned substance.Compare with gas multielement co-penetration, the production cycle of ion multi element copermeation is shorter, and workpiece deformation is little.But, other part of machine is had higher requirement along with science and technology development.Therefore, also be faced with the problem of further improving its quality as ion multi element copermeation technology, and one of key of ion multi element copermeation is to seek more suitable penetration enhancer.
The object of the present invention is to provide a kind of infiltration rate very fast, and can make processed workpiece surface have rare earth catalytic cementation ion sulphur, nitrogen, carbon co-cementation agent and the technology of better synthesis mechanical property.
Basic point of departure of the present invention is: the chemically reactive of utilizing rare earth element to have is come the kinetics of diffusion process in the speeding-up ion multiple permeation, reaches the purpose of catalyzer.As previously mentioned, one of key of ion multi element copermeation technology is a penetration enhancer.When selecting penetration enhancer, should consider the useful effect of rare earth element in the ion multi element copermeation process, also will consider the requirement of ion multi element copermeation technology and equipment itself penetration enhancer.Should be nontoxic such as penetration enhancer itself, body of heater there is not corrosive nature, must be nontoxic behind the pyrolytic decomposition, and be reducing atmosphere.With the exception of this, should consider that also penetration enhancer should be convenient to operation and factor such as control in technological process.Yet, seek the but not a duck soup of rare-earth carburizer that meets above requirement.Be dissolved in the alcohol as rare earth chloride commonly used, can contain a large amount of chlorions, cause the heavy corrosion of body of heater, pipeline and pump.As being dissolved in the alcohol, the CN of severe toxicity is arranged in the furnace gas then with the thiocyanic acid rare earth
-1Ion causes environmental pollution, and human body is had serious harm.As being dissolved in the alcohol with rare earth nitrate, then decomposes is emitted oxygen, makes furnace atmosphere be oxidisability.
Rare earth catalytic cementation ion sulphur provided by the present invention, nitrogen, carbon co-cementation agent also have methyl alcohol and alcohols rare earth, wherein except that ammonia, dithiocarbonic anhydride and ethanol are arranged
(1) form the mixed solution I by alcohols rare earth and methyl alcohol, its ratio is: when methyl alcohol was 50～80 milliliters, the alcohols rare earth was 5～15 milligrams;
(2) form the mixed solution II by dithiocarbonic anhydride, alcohols rare earth and ethanol, its ratio is: when ethanol was 20～50 milliliters, dithiocarbonic anhydride was 10～20 milliliters, and the alcohols rare earth is 2～5 milligrams;
(3) ratio of above-mentioned mixed solution I, II and ammonia is:
(mixed solution I)/(ammonia)=0.1/10～0.4/10, (mixed solution II)/(ammonia)=0.05/10～0.5/10.
Use the ion multi element copermeation technology of this penetration enhancer to be: penetration enhancer feeds with gaseous state to have in the vacuum vessel of DC electric field, make the abundant ionization of this gas, and bombardment places the workpiece surface on the negative electrode, vacuum tightness in the vacuum vessel is 133～1330pa, working temperature is 500～600 ℃, and voltage is 500～700 volts.Above parameter is identical with existing ion multi element copermeation technology parameter.Characteristics of the present invention are:
(1) ammonia in the penetration enhancer is formed mixed solution I gas and is mixed back the feeding in the vacuum vessel to be made of mixed solution II gas ethanol, dithiocarbonic anhydride, alcohols rare earth with negative pressure by methyl alcohol and alcohols rare earth with malleation.
(2) come the rare earth in the controlled atmosphere and the content of carbon by the inlet of regulating mixed solution I gas.If increase the shared ratio of mixed solution I, then the rare earth content in the atmosphere will increase.For the carbon in the atmosphere, increase the shared ratio of mixed solution I, then will play diluting effect.Therefore,, regulate, can make atmosphere stable, and operation is also more convenient with the input of mixed solution I the basic input of mixed solution II as sulphur, carbon, rare earth.
Example one
(1) with technology of the present invention to pure Fe, 20,20MnB, 40Cr, 40CrMo, 25Cr
2The MoV steel is handled.Processing parameter is: 560 ℃ of temperature; 4 hours time; Vacuum tightness 650Pa; The proportioning of mixed solution I is to add 10mg alcohols mishmetal in the 80ml methyl alcohol; The proportioning of mixed solution II is to add 10ml CS in the 20ml ethanol
2With 3mg alcohols mishmetal; Mixed solution I gas and NH
3The ratio of gas is 0.15/10; Mixed solution II gas and NH
3The ratio of gas is 0.2/10.
(2) with existing ion S, N, C confusion technology the workpiece of above-mentioned grade of steel is handled, diffusion medium is made up of ethanol, dithiocarbonic anhydride and ammonia; Other condition is identical with (1).Handle the depth of penetration that workpiece is detected in the back.
Comparing result is as shown in table 1.(table 1 is seen the literary composition back)
Example two
(1) with technology of the present invention 30CrMnSiA, 38CrMoAlA, 3Cr2W8V and 5CrMnMo steel are handled.Processing parameter is: 560 ℃ of temperature; 6 hours time; Vacuum tightness is 750Pa; The proportioning of mixed solution I and mixed solution II is with example one; Mixed solution I gas and NH
3The ratio of gas is 0.25/10; Mixed solution II gas and NH
3The ratio of gas is 0.15/10.
(2) steel of above-mentioned grade of steel is handled under the condition identical with existing ion S, N, C confusion technology with (1).
Comparing result is as shown in table 2.(table 2 is seen the literary composition back)
Example three
(1) with technology of the present invention the 30CrMnSiA steel is handled: its temperature is 510～520 ℃; 4 hours time; Vacuum tightness is 700Pa; Mixed solution I and II and NH
3Ratio be respectively 0.2/10 and 0.18/10.
(2) with existing ion S, N, C confusion technology the 30CrMnSiA steel is handled, the time was respectively 4 hours and 6 hours, and other conditions are identical with (1).
Above processed sample is carried out wearing test on MHK-500 ring piece trier, its result as shown in drawings.
Accompanying drawing is the wearing test curve with the sample of the present invention and other art breading.
As can be seen from the above results: because the activating catalysis and infiltration effect of rare earth, the present invention makes infiltration rate improve 20～40%, and wearability has improved about 50%. Metallographic Analysis shows, the workpiece that the present invention processes, its diffusion layer organize more refinement. Rare earth is energizer, is again to infiltrate element, and it has the effect of microalloying, thereby can improve the fatigue resistance of workpiece. In addition, the present invention selects the alcohols rare earth to make energizer, and it is soluble in the organic solvents such as methyl alcohol, ethanol, has to prepare advantage simple, easy to operate, the penetration enhancer stable performance; And nontoxic, pollution-free, equipment also there is not corrosiveness. The present invention is owing to improved infiltration rate, and the price of penetration enhancer is more cheap, so production cost is lower.
The workpiece depth of penetration (mm) that 560 ℃ * 4h of table 1 processes
The pure Fe 20 20MnB 40Cr 40CrMo 25Cr2MoV of grade of steel
Classification
Technology (2) 0.60 0.42 0.35 0.31 0.25 0.25
The present invention 0.81 0.56 0.44 0.41 0.34 0.30
Urge and ooze effect % 35 33 26 32 36 20
The workpiece depth of penetration (mm) that 560 ℃ * 6h of table 2 processes
Grade of steel 30CrMnSiA 38CrMoAlA 3Cr2W8V 5CrMnMo
Classification
Technology (2) 0.30 0.27 0.22 0.27
The present invention 0.38 0.35 0.36 0.38
Urge and ooze effect % 27 30 36 41
Claims (3)
1, a kind of rare earth catalytic cementation ion sulphur, nitrogen, carbon co-cementation agent comprise ammonia, dithiocarbonic anhydride and ethanol, it is characterized in that also having methyl alcohol and alcohols rare earth, wherein
(1) form the mixed solution I by alcohols rare earth and methyl alcohol, its ratio is: when methyl alcohol was 50～80 milliliters, the alcohols rare earth was 5～15 milligrams;
(2) form the mixed solution II by dithiocarbonic anhydride, alcohols rare earth and ethanol, its ratio is: when ethanol was 20～50 milliliters, dithiocarbonic anhydride was 10～20 milliliters, and the alcohols rare earth is 2～5 milligrams;
(3) ratio of above-mentioned mixed solution I, II and ammonia is:
(mixed solution I)/(ammonia)=0.1/10～0.4/10, (mixed solution II)/(ammonia)=0.05/10～0.5/10
2, ionitriding technology according to claim 1 is characterized in that said alcohols rare earth is the alcohols mishmetal.
3, a kind of rare earth ion sulphur, nitrogen, carbon co-infiltration method that uses the described penetration enhancer of claim 1, be penetration enhancer to be fed with gaseous state have in the vacuum vessel of DC electric field, make the abundant ionization of this gas, and bombardment places the workpiece surface on the negative electrode, vacuum tightness in the vacuum vessel is 133～1330pa, working temperature is 500～600 ℃, and voltage is 500～700 volts, it is characterized in that
(1) ammonia in the penetration enhancer is formed mixed solution I gas and is mixed back the feeding in the vacuum vessel to be made of mixed solution II gas ethanol, dithiocarbonic anhydride, alcohols rare earth with negative pressure by methyl alcohol and alcohols rare earth with malleation,
(2) come the rare earth in the controlled atmosphere and the content of carbon by the inlet of regulating mixed solution I gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92114422 CN1025226C (en) | 1992-12-10 | 1992-12-10 | Rare earth catalytic ion S, N, C co-osmosizing agent and its technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92114422 CN1025226C (en) | 1992-12-10 | 1992-12-10 | Rare earth catalytic ion S, N, C co-osmosizing agent and its technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1074490A CN1074490A (en) | 1993-07-21 |
| CN1025226C true CN1025226C (en) | 1994-06-29 |
Family
ID=4946924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92114422 Expired - Fee Related CN1025226C (en) | 1992-12-10 | 1992-12-10 | Rare earth catalytic ion S, N, C co-osmosizing agent and its technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1025226C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1049252C (en) * | 1997-12-26 | 2000-02-09 | 清华大学 | Compound treatment method for ion nitrogen carbon co-seeping and medium temperature ion sulfuriztion |
| CN100343651C (en) * | 2005-09-27 | 2007-10-17 | 上海新三思计量仪器制造有限公司 | Method for manufacturing steel inlaid guide rail sheet of large tonnage tester for metal tension test |
| CN106048516B (en) * | 2016-07-06 | 2018-08-31 | 四川宏源锐达科技有限公司 | A kind of preset multielement enhanced method of three-stage process gas phase of low temperature |
-
1992
- 1992-12-10 CN CN 92114422 patent/CN1025226C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1074490A (en) | 1993-07-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Macaskie et al. | A new approach for the recovery of precious metals from solution and from leachates derived from electronic scrap | |
| Gadd et al. | Biomineralization, bioremediation and biorecovery of toxic metals and radionuclides | |
| Lewis et al. | Physiological factors affecting carbon tetrachloride dehalogenation by the denitrifying bacterium Pseudomonas sp. strain KC | |
| Mabbett et al. | Effect of complexing agents on reduction of Cr (VI) by Desulfovibrio vulgaris ATCC 29579 | |
| SE506530C2 (en) | Method of steel nitration | |
| CN114409051B (en) | Method for removing pollutants through high-efficiency reduction of ball-milling lignin sulfonated zero-valent iron | |
| CN1025226C (en) | Rare earth catalytic ion S, N, C co-osmosizing agent and its technology | |
| Zou et al. | Impact of heavy metals on denitrification of simulated mining wastewaters | |
| CN102125862B (en) | Low-temperature carbonitriding catalyst and carbonitriding method thereof | |
| CN1106454C (en) | Nitrizing for steel | |
| DE69902169T2 (en) | METHOD FOR LOW PRESSURE NITROCARBURING METAL WORKPIECES | |
| CN1401820A (en) | Ordinary temp. parkerizing liquid | |
| McCarty et al. | Inhibition of nitrification in soil by gaseous hydrocarbons | |
| CN113649034A (en) | Transition metal phosphide-modified nano-iron composite material and preparation method and application thereof | |
| McKenney et al. | Effect of cadmium contamination on denitrification processes in Brookston clay and Fox sandy loam | |
| Fekete et al. | Isolation and preliminary characterization of hydroxamic acids formed by nitrogen-fixing Azotobacter chroococcum B-8 | |
| CN85100129A (en) | The surface of high speed steel co-infiltration technique of sulfur, oxygen, carbon, nitrogen and boron into | |
| Szabo et al. | Mass spectrometric diagnosis of the surface nitriding mechanism in a dc glow discharge | |
| CN1081209A (en) | New particulate boronizing agent and compound method | |
| Hou et al. | Efficient iron single-atom materials for environmental pollutants removal from aqueous solutions: A review | |
| CN85100594A (en) | Rare earth, carbon, nitrogen three-component co-infiltration, rare earth, carbon binary co-infiltration chemical infiltration agent and formula | |
| CN114226446A (en) | A method for strengthening persulfate remediation of pesticide-contaminated soil by regulating the addition time of remediation agents | |
| Wood | The Structure of Iron-Carboxylic Acid Surface Films | |
| Gang et al. | Impact of heavy metals on denitrification of simulated mining wastewater | |
| CN1032316C (en) | Repid fumigating cementation method for nitriding iron steel working pieces |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |