CN102912289A - Novel TD method salt bath diffusion agent with rare-earth Nd - Google Patents
Novel TD method salt bath diffusion agent with rare-earth Nd Download PDFInfo
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- CN102912289A CN102912289A CN2012104461525A CN201210446152A CN102912289A CN 102912289 A CN102912289 A CN 102912289A CN 2012104461525 A CN2012104461525 A CN 2012104461525A CN 201210446152 A CN201210446152 A CN 201210446152A CN 102912289 A CN102912289 A CN 102912289A
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Abstract
The invention belongs to the field of die surface strengthening treatment. Through the TD method treatment, a vanadium carbide (VC) coating of microns or scores of microns thick can be formed on the surface of a die; the coating is uniform in thickness and compact, and has properties of high hardness, good abrasive resistance, seizure resistance and the like; and the service life of the die can be efficiently improved. Meanwhile, the binding property of the coating and a base body can directly affect the use effect of the coating and the service life of the die. Compared with the conventional TD method salt bath diffusion agent, the novel diffusion agent with rare-earth Nd can facilitate diffusion of surface elements, improve the binding force of the coating surface, and form an obvious diffusion layer between the coating and the base body. As the hardness of the diffusion layer is higher than that of the base body, the diffusion layer can play better support role for the VC coating, the probability that the coating is stripped and broken during the service process is greatly lowered, and the purposes of improving the working quality of the die and prolonging the service life can be realized.
Description
Technical field
The present invention relates to field of metal surface treatment technology, specifically add a kind of novel TD method salt bath penetration enhancer of rare earth Nd.
Background technology
TD method salt bath vanadizing is one of material surface modifying treatment process, is widely used in surface strengthening, the raising mold use life-span of mould.The method is with basic salt promoter crucible, and is heated to 800 ~ 1250 ℃, adds a certain proportion of vanadium agent, activator and reductive agent of supplying again, and forms fused salt; Then the material that will process is immersed in the salt bath furnace and be incubated certain hour, the acquisition infiltration layer.In this process, the active vanadium atom that is reduced out is deposited on material surface, forms several microns to tens microns vanadium carbide (VC) coating with the carbon atom that is diffused into the surface by matrix.This coating thickness is even, fine and close, has the characteristics such as high rigidity, good wear resistance and seizure resistance, is conducive to improve the mold use life-span.Meanwhile, the bonding properties of coating and matrix also directly affects result of use and the die life of coating.
In order to optimize the bonding properties of coating and matrix, traditional TD method salt bath penetration enhancer is innovated, in penetration enhancer, add an amount of rare earth neodymium (Nd).Experiment shows, the interface is clear between the coating that uses traditional TD method salt bath penetration enhancer to process to obtain and matrix, without obvious diffusion layer; And the salt bath penetration enhancer that adds an amount of rare earth neodymium Nd can promote the diffusion of interface element, improves the bonding force at coating interface, forms obvious diffusion layer.This diffusion layer hardness is higher than matrix hardness, can be the VC coating better supporting role is provided, and greatly reduces coating and peels off broken possibility in the process under arms, and the use properties of coating is better brought into play.This salt bath penetration enhancer there is not yet report through preliminary search in the material surface process field, and this application for following this technology provides excellent opportunity.
This salt bath penetration enhancer has a extensive future in the surface strengthening field of mould in industrial production, to improving die life, improves enterprises production efficiency, reduces enterprise's production cost and resource consumption and has great significance.
Summary of the invention
The purpose of this invention is to provide a kind of a kind of novel TD method salt bath penetration enhancer that adds rare earth Nd, on traditional TD method salt bath penetration enhancer basis, in penetration enhancer, add innovatively rare earth neodymium, and drawn by experiment the optimum addition of neodymium, obtain a kind of novel TD method salt bath penetration enhancer.
Its technical scheme is as follows:, add a kind of novel TD method salt bath penetration enhancer of rare earth Nd, it is characterized in that: add neodymium in TD method salt bath penetration enhancer, the addition of neodymium is TD method salt bath penetration enhancer total amount: 0.5%-2.0 %.
TD method salt bath penetration enhancer comprises basic salt, supplies vanadium agent, activator, reductive agent, and its quality is basic salt 75%-80%, supplies vanadium agent 8%-12%, activator 8%-12%, reductive agent 2%-3% that than percentage ratio reductive agent is aluminium powder and neodymium.
Base salt is borax, sodium-chlor, dichloride barium or their mixture, is Vanadium Pentoxide in FLAKES for the vanadium agent, and activator is the Sodium Fluoride reductive agent.
This penetration enhancer for preparing is mixed, put into crucible after stove furnace temperature to be heated reaches 800 ℃, treat that salt melts evenly and when reaching 950 ℃ for the treatment of temps, workpiece is put into molten salt bath, be incubated 4 hours, the acquisition infiltration layer.
The SEM of the different infiltration layers of the parameter of reductive agent is also with difference.Adopt penetration enhancer shown in homemade external-heat electrical crucible and the table 1, H13 steel (being also referred to as the 4Cr5MoSiV1 steel) is carried out TD process, the tissue topography of the infiltration layer that obtains has diffusion layer.
Adopt the salt bath formula (soon reductive agent changes the 3.0wt% aluminium powder in the table 1) that does not contain rare earth neodymium, when other experiment condition was identical, the tissue topography of H13 steel surface infiltration layer had no obvious diffusion layer.
Be five H13 steel samples after different salt bath formulas are processed (other experiment condition is identical), the Hardness Distribution curve of the infiltration layer section that obtains.The neodymium addition is followed successively by in the 1-5# sample salt bath formula: 0wt%, 0.5wt%, 1.0 wt%, 1.5 wt%, 2.0 wt%.The VC coating of 3# sample and the hardness of diffusion layer are the highest, best performance, and the optimum addition of visible rare earth neodymium is 1.0 wt%.
Advantage of the present invention is: this penetration enhancer can promote the diffusion of interface element, improves the bonding force at coating interface, forms obvious diffusion layer.Because diffusion layer hardness is higher than matrix hardness, can be the VC coating better supporting role is provided, greatly reduces coating and peel off broken possibility in the process under arms.In the surface Hardening Treatment field of mould, significant with the aspect that increases the service life to improving the mold work quality.
Description of drawings
Fig. 1 is the infiltration layer SEM pattern that diffusion layer is arranged.
Fig. 2 is the infiltration layer SEM pattern that has no obvious diffusion layer.
Fig. 3 is hardness-to the relation curve of surface distance.
Among Fig. 1,1. white bright zone is the vanadium carbide coating; 2. texture zone more coarse, that be the pit shape is diffusion layer; 3. the smooth zone of texture is matrix.Fig. 3 be five H13 steel samples after different salt bath formulas are processed (other experiment condition is identical), the Hardness Distribution curve of the infiltration layer section that obtains.The neodymium addition is followed successively by in the 1-5# sample salt bath formula: 0wt%, 0.5wt%, 1.0 wt%, 1.5 wt%, 2.0 wt%.The VC coating of 3# sample and the hardness of diffusion layer are the highest, best performance, and the optimum addition of visible rare earth neodymium is 1.0 wt%.
Embodiment
Add in proportion rare earth Nd, add neodymium in TD method salt bath penetration enhancer, the addition of neodymium is TD method salt bath penetration enhancer total amount: 0.5%-2.0 %.
TD method salt bath penetration enhancer comprises basic salt, supplies vanadium agent, activator, reductive agent, and its quality is basic salt 75%-80%, supplies vanadium agent %8-12%, activator 8%-12%, reductive agent 2%-3% that than percentage ratio reductive agent is aluminium powder and neodymium.
Base salt is borax, sodium-chlor, dichloride barium or their mixture, is Vanadium Pentoxide in FLAKES for the vanadium agent, and activator is the Sodium Fluoride reductive agent.
The salt bath formula for preparing is mixed, put into crucible after stove furnace temperature to be heated reaches 800 ℃, treat that salt melts evenly and when reaching 950 ℃ for the treatment of temps, workpiece is put into molten salt bath, be incubated 4 hours, the acquisition infiltration layer.
When adopting homemade external-heat electrical crucible that the H13 steel is processed, the tissue topography of the infiltration layer that obtains as shown in Figure 1.
But optimal components and the massfraction thereof that all can realize the present invention this penetration enhancer in the aforementioned proportion scope are as shown in the table:
Claims (4)
1. add a kind of novel TD method salt bath penetration enhancer of rare earth Nd, it is characterized in that: add neodymium in TD method salt bath penetration enhancer, the addition of neodymium is TD method salt bath penetration enhancer total amount: 0.5%-2.0 %.
2. a kind of novel TD method salt bath penetration enhancer of adding rare earth Nd according to claim 1, it is characterized in that: TD method salt bath penetration enhancer comprises basic salt, the agent of confession vanadium, activator, reductive agent, and its quality is basic salt 70%-80%, confession vanadium agent %8-12%, activator 8%-12% than percentage ratio
,Reductive agent 2%-3%, reductive agent are aluminium powder and neodymium.
3. a kind of novel TD method salt bath penetration enhancer of adding rare earth Nd according to claim 1, it is characterized in that: basic salt is borax, sodium-chlor, dichloride barium or their mixture, is Vanadium Pentoxide in FLAKES for the vanadium agent, activator is the Sodium Fluoride reductive agent.
4. the preparation method of a kind of novel TD method salt bath penetration enhancer of adding rare earth Nd as claimed in claim 1, it is characterized in that: this penetration enhancer for preparing is mixed, after reaching 800 ℃, stove furnace temperature to be heated puts into crucible, treat that salt melts evenly and when reaching 950 ℃ for the treatment of temps, workpiece is put into molten salt bath, be incubated 4 hours, obtain infiltration layer.
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| CN2012104461525A CN102912289A (en) | 2012-11-09 | 2012-11-09 | Novel TD method salt bath diffusion agent with rare-earth Nd |
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| CN2012104461525A CN102912289A (en) | 2012-11-09 | 2012-11-09 | Novel TD method salt bath diffusion agent with rare-earth Nd |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103589991A (en) * | 2013-10-25 | 2014-02-19 | 沈阳建筑大学 | Rare-earth vanadinizing method for stainless steel cold stamping die |
| CN104847662A (en) * | 2015-06-09 | 2015-08-19 | 广东美芝制冷设备有限公司 | Compressing component of compressor, preparation method method of compressing component, compressor and refrigerating device |
| CN108165924A (en) * | 2017-12-29 | 2018-06-15 | 珠海格莱利摩擦材料有限公司 | A kind of salt bath penetration enhancer and its application process for being used to enhance mould steel case hardness |
| CN109402626A (en) * | 2017-08-18 | 2019-03-01 | 天津理工大学 | The method of super abrasive composite coating is prepared in heavily loaded stamping die |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87104782A (en) * | 1986-07-07 | 1988-01-20 | 株式会社丰田中央研究所 | Surface preparation and processing material thereof |
-
2012
- 2012-11-09 CN CN2012104461525A patent/CN102912289A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87104782A (en) * | 1986-07-07 | 1988-01-20 | 株式会社丰田中央研究所 | Surface preparation and processing material thereof |
Non-Patent Citations (2)
| Title |
|---|
| 王维等: "模具钢的TD法盐浴渗金属表面强化", 《热处理》, vol. 27, no. 3, 25 June 2012 (2012-06-25), pages 28 - 33 * |
| 邹隽: "TD法盐浴渗钒在冷作模表面强化中的应用研究", 《武汉理工大学硕士学位论文》, 15 August 2005 (2005-08-15) * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103589991A (en) * | 2013-10-25 | 2014-02-19 | 沈阳建筑大学 | Rare-earth vanadinizing method for stainless steel cold stamping die |
| CN103589991B (en) * | 2013-10-25 | 2016-06-01 | 沈阳建筑大学 | The rare earth of a kind of stainless steel cold punching die oozes vanadium method |
| CN104847662A (en) * | 2015-06-09 | 2015-08-19 | 广东美芝制冷设备有限公司 | Compressing component of compressor, preparation method method of compressing component, compressor and refrigerating device |
| CN109402626A (en) * | 2017-08-18 | 2019-03-01 | 天津理工大学 | The method of super abrasive composite coating is prepared in heavily loaded stamping die |
| CN108165924A (en) * | 2017-12-29 | 2018-06-15 | 珠海格莱利摩擦材料有限公司 | A kind of salt bath penetration enhancer and its application process for being used to enhance mould steel case hardness |
| CN108165924B (en) * | 2017-12-29 | 2020-06-16 | 珠海格莱利摩擦材料有限公司 | Salt bath penetrating agent for enhancing surface hardness of die steel and application method thereof |
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Application publication date: 20130206 |