CN107385387A - A kind of lanthana urges the big infiltration layer oozed, high quality salt bath B-V co-penetrant and co-penetration technology - Google Patents
A kind of lanthana urges the big infiltration layer oozed, high quality salt bath B-V co-penetrant and co-penetration technology Download PDFInfo
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- 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
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- C23C12/02—Diffusion in one step
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Abstract
A kind of lanthana urges the big infiltration layer oozed, high quality salt bath B-V co-penetrant and its co-penetration technology, and it is with B2O3For the salt bath B-V co-penetrant of base salt, mainly it is made up of boron oxide, sodium fluoride, boron carbide, barium chloride, vanadic anhydride by certain mass percent.Technique be workpiece surface is polished, clean after be put into the crucible equipped with salt bath medium, in 950 DEG C of environment, be incubated 4h, carry out boron-vanadium co-penetration.Residue is removed by the workpiece oil quenching of boron-vanadium co-penetration.The infiltration layer of the present invention has more preferable toughness and wearability, and compared to the penetration enhancer for not adding lanthana, properties are improved after adding lanthana, and its engineering use value is greatly improved.
Description
Technical field
It is specifically a kind of to be added in salt bath penetration enhancer the present invention relates to a kind of optimization of TD salt baths process for modifying surface
Lanthana energizer, the boron vanadium for rapidly and efficiently preparing thickness in 42CrMo steel surfaces by the method that chemical thermal diffusion reaction deposits are total to
Infiltration layer.
Background technology
42CrMo steel has high intensity and toughness and is widely used in gear manufacture and mould production.However as industry
Change process quickly propels, performance requirement more and more higher of the element part to material.Therefore develop higher performance material into
For a kind of trend.Surface Technics are as a kind of most popular method of material reinforcement, since the 60's of 20th century
Flourish, in order to meet the increasingly fast-developing high request to material surface property, developed many surfaces
The new method of processing, wherein Japanese Toyota center Research Institute go out in borax bath vanadinizing, ooze titanium, ooze niobium, ooze zirconium, chromising,
Oozing tungsten, ooze the isotonic strong carbide element method of molybdenum (Toyota Diffusion Coating Process, abbreviation TD method).Compared to it
His process for modifying surface, such as the technology such as physical vapour deposition (PVD), chemical vapor deposition, laser reinforcing, TD technologies have price low
It is honest and clean, the advantages that process stabilizing, effect stability, fast infiltration rate.Its principle is to use diffusion method, steel surface is formed the carbonization of institute's metallic cementation
The infiltration layer of thing, chromium solid solution, boride etc..Due to the ultrahigh hardness of carbide lamella, steel surface is obtained excellent wear-resisting, anti-
Corrosion.
The TD methods using borax as base salt have been obtained for extensive utilization, but mainly some lists in metal heat treatmet at present
Cementation process.Therefore co-penetration technology is favored by numerous scholars, but it is found that some performance levels of co-penetration layer are not high,
How to obtain the high co-penetration layer of quality by optimize technique becomes the difficult point of research.The present invention is based on this problem and carried
The one kind gone out adds lanthana as energizer in TD salt bath penetration enhancers, and it is fast, wear-resisting and thick to prepare infiltration rate in 42CrMo steel surfaces
Spend big boron-vanadium co-penetration layer process.Also use B in addition2O3Traditional borax bath is substituted, reduces corrosion of the salt bath to matrix, improves
The quality of infiltration layer.
The content of the invention
The purpose of the present invention be for current boron-vanadium co-penetration technology generally existing infiltration rate it is slow, infiltration layer is thin, surface quality is poor
The problems such as, there is provided a kind of lanthana urges the big infiltration layer oozed, high quality salt bath B-V co-penetrant and co-penetration technology, and it can not only
Obtain the boron-vanadium co-penetration layer of big layer surface good quality while infiltration rate is improved, and with preferable operability and excellent
Good economy.
One of technical scheme is：
A kind of lanthana urges the big infiltration layer oozed, high quality salt bath B-V co-penetrant, it is characterised in that it is with boron oxide（B2O3）
For the salt bath B-V co-penetrant of base salt, mainly by boron oxide（B2O3）, sodium fluoride（NaF）, boron carbide（B4C）, barium chloride
（BaCl2）, vanadic anhydride（V2O5）, lanthana（La2O3）Composition；The mass fraction of each composition is respectively：Boron oxide（B2O3）
50.49% ~ 51%, sodium fluoride（NaF）25.74% ~ 26%, vanadic anhydride（V2O5）9.9 ~ 10%, barium chloride（BaCl2）7.92~8%、
Boron carbide（B4C）4.95 ~ 5%, lanthana（La2O3）0.2 ~ 1%, the mass percent sum of each component is 100%.
Add La2O3Both catalytic action, which can have been played, makes reaction thoroughly, can also serve to urge and ooze to obtain thicker ooze
Layer.The B2O3Pure to analyze, its content is not less than 90%；V2O5Pure to analyze, content is not less than 99.5%；B4C content is not less than
90%；La2O3For high purity reagent, purity 99.99%.
The two of technical scheme are：
It is a kind of that the big infiltration layer oozed, the co-infiltrating method of high quality salt bath B-V co-penetrant are urged based on lanthana, it is characterised in that it is wrapped
Include following steps：
（1）According to boron-vanadium co-penetration agent prescription mass percent weigh raw material and mechanical mixture it is uniform after be put into it is standby in crucible；
（2）Matrix material pre-processes：Matrix material of the present invention selects 42CrMo steel, first by raw material wire cutting（Or other machines
Processing method）Into the sample of 10 × 10 × 3mm sizes, surface carries out sand paper polishing and machinery after oil removing, deionized water cleaning
Polishing, it is Ra1 μm that surface, which is thrown to roughness, and then acetone ultrasonic wave cleaning at least 10min, alcohol flushing drying, are made examination
Sample；
（3）Boron-vanadium co-penetration processing：Raw material after will be well mixed is poured into corundum crucible, is warming up to 1000 ± 50 DEG C of temperature, so
15 ± 5 min of insulation make penetration enhancer melt uniformly afterwards, are then cooled to 950 DEG C, and B-V co-penetrant is made；Sample is put into match somebody with somebody and got ready
Penetration enhancer salt bath in, and make sample groundwork face as far as possible keep it is vertical with salt bath flow direction, held for some time 4 ±
0.5h takes out oil quenching, i.e., boron vanadium layers is made in 42CrMo steel surfaces；
（4）Washed samples：Sample is gently tapped, the residual salt in its surface is come off, if still there is residual salt to adhere to, can be heated to water bath
100 DEG C are boiled 1h or so；
Well mixed be placed in corundum crucible of the penetration enhancer prepared is capped before experiment, then is put into high-temperature seal adhesive sealing in baking oven
45min drying is incubated in 100 DEG C；After the sample progress oil quenching of taking-up, specimen surface are cleaned up after experiment at 180 DEG C next time
Fiery 2h.
The beneficial effects of the invention are as follows：
（1）The invention provides a kind of lanthana simple to operate, that processing performance is excellent to urge boronising V co-penetrant and co-penetration technology,
Its final nitrided layer hardness is 2573.7-2612HV, relative to be not added with La2O3Hardness 2173.8 improve 18.4%-20.2%.
（2）Invention significantly improves the thickness of salt bath co-penetration layer.0.5%La is added under same process parameter2O3Ooze
Layer maximum gauge has reached 205 μm, is relatively not added with La2O3129 μm of alloying layer thickness improve 59%
（3）Invention significantly improves the interface binding power of salt bath co-penetration layer.0.5%La is added under same process parameter2O3's
Infiltration layer interface binding power is 68N, is not added with La2O3Infiltration layer interface binding power be 58N.
（3）The present invention effectively reduces the coefficient of friction of material surface.Add La2O3The boron-vanadium co-penetration layer oozed is urged to be averaged
Coefficient of friction is about 0.12, and is not added with La2O3Boron-vanadium co-penetration be 0.25, show add lanthana boron-vanadium co-penetration layer have
More preferable toughness and wearability.
（4）The invention provides optimal La2O3Addition, good reference is provided for follow-up correlative study.
Brief description of the drawings
Fig. 1 be embodiment one sample experiment after boron-vanadium co-penetration layer cross sectionization dye SEM shape appearance figures.
Fig. 2 be embodiment one sample experiment after boron-vanadium co-penetration layer surface XRD spectrum.
Fig. 3 be embodiment one sample experiment after the interface cohesion of boron-vanadium co-penetration layer and matrix try hard to.
Fig. 4 be embodiment one sample experiment after boron-vanadium co-penetration layer the friction coefficient frictional wear experiment carry out the time
Change.
Fig. 5 be embodiment two sample experiment after boron-vanadium co-penetration layer cross sectionization dye SEM shape appearance figures.
Fig. 6 be embodiment three sample experiment after boron-vanadium co-penetration layer cross sectionization dye SEM shape appearance figures.
Fig. 7 be comparative example one sample experiment after boron-vanadium co-penetration layer cross sectionization dye SEM shape appearance figures.
Fig. 8 be comparative example one sample experiment after the interface cohesion of boron-vanadium co-penetration layer and matrix try hard to.
Fig. 9 be comparative example one sample experiment after boron-vanadium co-penetration layer the friction coefficient frictional wear experiment carry out the time
Change.
Embodiment：
The present invention is further illustrated with example below in conjunction with the accompanying drawings.
Embodiment one.
As Figure 1-4.
The salt bath B-V co-penetrant of the present embodiment is by lanthana（La2O3）0.5g, boron oxide（B2O3）50.74g, sodium fluoride
（NaF）25.87g, vanadic anhydride（V2O5）9.95g, barium chloride（BaCl2）7.96g, boron carbide（B4C）4.98g composition.
Boron-vanadium co-penetration technique is：Specimen surface pretreatment-boron-vanadium co-penetration processing-washed samples
（1）According to boron-vanadium co-penetration agent prescription mass percent weigh raw material and mechanical mixture it is uniform after be put into it is standby in crucible；
During specific implementation preferably by the salt bath B-V co-penetrant mechanical mixture prepared it is uniform after be placed in corundum crucible and be capped, then use high temperature
Sealant sealing, which is put into baking oven, is incubated 45min drying in 100 DEG C.
（2）Matrix material pre-processes：Matrix material of the present invention selects 42CrMo steel, first by raw material wire cutting into 10 ×
The sample of 10 × 3mm sizes, surface carry out sand paper polishing and mechanical polishing after oil removing, deionized water cleaning, by surface throw to
Roughness isRa1 μm, then acetone ultrasonic wave cleaning at least 10min, alcohol flushing drying, are made sample；
（3）Boron-vanadium co-penetration processing：Raw material after will be well mixed is poured into corundum crucible, is warming up to 1000 ± 50 DEG C of temperature, so
15 ± 5min of insulation makes penetration enhancer melt uniformly afterwards, is then cooled to 950 DEG C, and B-V co-penetrant is made；Sample is put into match somebody with somebody and got ready
Penetration enhancer salt bath in, and make sample groundwork face as far as possible keep it is vertical with salt bath flow direction, held for some time 4 ±
0.5h takes out oil quenching, i.e., boron vanadium layers is made in 42CrMo steel surfaces；
（4）Washed samples：Sample is gently tapped, the residual salt in its surface is come off, if still there is residual salt to adhere to, can be heated to water bath
100 DEG C are boiled 1h or so；In order to further improve sample performance, preferably sample of the surface clean after clean is existed after experiment
2h is tempered at 180 DEG C.
Detected to taking out sample, the thickness of scanned Electronic Speculum test boron-vanadium co-penetration layer is 205 μm；Layer surface is micro-
Hardness is 2581.3HV；XRD material phase analysis shows that infiltration layer contains VC, Fe2C、Fe2B；The interface binding power of matrix and infiltration layer is
68N, it is about 0.12 that rubbed abrasion tester, which measures specimen surface coefficient of friction,.As Figure 1-4.
Embodiment two.
As shown in Figure 5.
The salt bath B-V co-penetrant of the present embodiment is by lanthana（La2O3）0.2g, boron oxide（B2O3）50.87g, sodium fluoride
（NaF）25.98g, vanadic anhydride（V2O5）9.98g, barium chloride（BaCl2）7.98g, boron carbide（B4C）4.99g composition.
Boron-vanadium co-penetration technique is：Specimen surface pretreatment-boron-vanadium co-penetration processing-washed samples
（1）According to boron-vanadium co-penetration agent prescription mass percent weigh raw material and mechanical mixture it is uniform after be put into it is standby in crucible；
During specific implementation preferably by the salt bath B-V co-penetrant mechanical mixture prepared it is uniform after be placed in corundum crucible and be capped, then use high temperature
Sealant sealing, which is put into baking oven, is incubated 45min drying in 100 DEG C.
（2）Matrix material pre-processes：Matrix material of the present invention selects 42CrMo steel, first by raw material wire cutting into 10 ×
The sample of 10 × 3mm sizes, surface carry out sand paper polishing and mechanical polishing after oil removing, deionized water cleaning, by surface throw to
Roughness isRa1 μm, then acetone ultrasonic wave cleaning 10min, alcohol flushing drying, are made sample；
（3）Boron-vanadium co-penetration processing：Raw material after will be well mixed is poured into corundum crucible, is warming up to 1000 DEG C of temperature, Ran Houbao
15 min of temperature make penetration enhancer melt uniformly, are then cooled to 950 DEG C, and B-V co-penetrant is made；Sample is put into the penetration enhancer got ready
In salt bath, and the groundwork face of sample is set to keep vertical with salt bath flow direction as far as possible, held for some time 4h takes out oil quenching,
Boron vanadium layers are made in 42CrMo steel surfaces；
（4）Washed samples：Sample is gently tapped, the residual salt in its surface is come off, if still there is residual salt to adhere to, can be heated to water bath
100 DEG C are boiled 1h or so；In order to further improve sample performance, preferably sample of the surface clean after clean is existed after experiment
2h is tempered at 180 DEG C.
Take out sample to be detected, the thickness of scanned Electronic Speculum test boron-vanadium co-penetration layer is 195 μm；Layer surface is micro- hard
Spend for 2573.7HV；The phase composition of infiltration layer thing and other performances and embodiment one are similar.
Embodiment three.
As shown in Figure 6.
The salt bath B-V co-penetrant of the present embodiment is by lanthana（La2O3）1g, boron oxide（B2O3）50.49g, sodium fluoride
（NaF）25.74g, vanadic anhydride（V2O5）9.9g, barium chloride（BaCl2）7.92g, boron carbide（B4C）4.95g composition.
Boron-vanadium co-penetration technique is：Specimen surface pretreatment-boron-vanadium co-penetration processing-washed samples
（1）According to boron-vanadium co-penetration agent prescription mass percent weigh raw material and mechanical mixture it is uniform after be put into it is standby in crucible；
During specific implementation preferably by the salt bath B-V co-penetrant mechanical mixture prepared it is uniform after be placed in corundum crucible and be capped, then use high temperature
Sealant sealing, which is put into baking oven, is incubated 45min drying in 100 DEG C.
（2）Matrix material pre-processes：Matrix material of the present invention selects 42CrMo steel, first by raw material wire cutting into 10 ×
The sample of 10 × 3mm sizes, surface carry out sand paper polishing and mechanical polishing after oil removing, deionized water cleaning, by surface throw to
Roughness isRa1 μm, then acetone ultrasonic wave cleaning 10min, alcohol flushing drying, are made sample；
（3）Boron-vanadium co-penetration processing：Raw material after will be well mixed is poured into corundum crucible, is warming up to 1000 DEG C of temperature, Ran Houbao
15 min of temperature make penetration enhancer melt uniformly, are then cooled to 950 DEG C, and B-V co-penetrant is made；Sample is put into the penetration enhancer got ready
In salt bath, and the groundwork face of sample is set to keep vertical with salt bath flow direction as far as possible, held for some time 4h takes out oil quenching,
Boron vanadium layers are made in 42CrMo steel surfaces；
（4）Washed samples：Sample is gently tapped, the residual salt in its surface is come off, if still there is residual salt to adhere to, can be heated to water bath
100 DEG C are boiled 1h or so；In order to further improve sample performance, preferably sample of the surface clean after clean is existed after experiment
2h is tempered at 180 DEG C.
Take out sample to be detected, the thickness of scanned Electronic Speculum test boron-vanadium co-penetration layer is 202 μm；Layer surface is micro- hard
Spend for 2612HV, the phase composition of infiltration layer thing and other performances and embodiment one it is similar.
Example IV
The salt bath B-V co-penetrant of the present embodiment is by lanthana（La2O3）0.3g, boron oxide（B2O3）51g, sodium fluoride（NaF）
25.8g, vanadic anhydride（V2O5）10g, barium chloride（BaCl2）7.92g, boron carbide（B4C）4. 98g is formed.
Boron-vanadium co-penetration technique is：Specimen surface pretreatment-boron-vanadium co-penetration processing-washed samples
（1）According to boron-vanadium co-penetration agent prescription mass percent weigh raw material and mechanical mixture it is uniform after be put into it is standby in crucible；
During specific implementation preferably by the salt bath B-V co-penetrant mechanical mixture prepared it is uniform after be placed in corundum crucible and be capped, then use high temperature
Sealant sealing, which is put into baking oven, is incubated 45min drying in 100 DEG C.
（2）Matrix material pre-processes：Matrix material of the present invention selects 42CrMo steel, first by raw material wire cutting into 10 ×
The sample of 10 × 3mm sizes, surface carry out sand paper polishing and mechanical polishing after oil removing, deionized water cleaning, by surface throw to
Roughness isRa1 μm, then acetone ultrasonic wave cleaning 15min, alcohol flushing drying, are made sample；
（3）Boron-vanadium co-penetration processing：Raw material after will be well mixed is poured into corundum crucible, is warming up to 1000 DEG C of temperature, Ran Houbao
10 min of temperature make penetration enhancer melt uniformly, are then cooled to 950 DEG C, and B-V co-penetrant is made；Sample is put into the penetration enhancer got ready
In salt bath, and the groundwork face of sample is set to keep vertical with salt bath flow direction as far as possible, held for some time 4h takes out oil quenching,
Boron vanadium layers are made in 42CrMo steel surfaces；
（4）Washed samples：Sample is gently tapped, the residual salt in its surface is come off, if still there is residual salt to adhere to, can be heated to water bath
100 DEG C are boiled 1h or so；In order to further improve sample performance, preferably sample of the surface clean after clean is existed after experiment
2h is tempered at 180 DEG C.
Take out sample to be detected, scanned Electronic Speculum tests the thickness of boron-vanadium co-penetration layer, layer surface microhardness etc.
It is similar to embodiment one.
Embodiment five
The salt bath B-V co-penetrant of the present embodiment is by lanthana（La2O3）0.59g, boron oxide（B2O3）50.5g, sodium fluoride（NaF）
26g, vanadic anhydride（V2O5）9.91g, barium chloride（BaCl2）8g, boron carbide（B4C）5g is formed.
Boron-vanadium co-penetration technique is：Specimen surface pretreatment-boron-vanadium co-penetration processing-washed samples
（1）According to boron-vanadium co-penetration agent prescription mass percent weigh raw material and mechanical mixture it is uniform after be put into it is standby in crucible；
During specific implementation preferably by the salt bath B-V co-penetrant mechanical mixture prepared it is uniform after be placed in corundum crucible and be capped, then use high temperature
Sealant sealing, which is put into baking oven, is incubated 45min drying in 100 DEG C.
（2）Matrix material pre-processes：Matrix material of the present invention selects 42CrMo steel, first by raw material wire cutting into 10 ×
The sample of 10 × 3mm sizes, surface carry out sand paper polishing and mechanical polishing after oil removing, deionized water cleaning, by surface throw to
Roughness isRa1 μm, then acetone ultrasonic wave cleaning 10min, alcohol flushing drying, are made sample；
（3）Boron-vanadium co-penetration processing：Raw material after will be well mixed is poured into corundum crucible, is warming up to 1100 DEG C of temperature, Ran Houbao
20 min of temperature make penetration enhancer melt uniformly, are then cooled to 950 DEG C, and B-V co-penetrant is made；Sample is put into the penetration enhancer got ready
In salt bath, and the groundwork face of sample is set to keep vertical with salt bath flow direction as far as possible, held for some time 4h takes out oil quenching,
Boron vanadium layers are made in 42CrMo steel surfaces；
（4）Washed samples：Sample is gently tapped, the residual salt in its surface is come off, if still there is residual salt to adhere to, can be heated to water bath
100 DEG C are boiled 1.5h or so；In order to further improve sample performance, preferably sample of the surface clean after clean is existed after experiment
2h is tempered at 180 DEG C.
Take out sample to be detected, scanned Electronic Speculum tests the thickness of boron-vanadium co-penetration layer, layer surface microhardness etc.
It is similar to embodiment one.
Comparative example one
As Figure 7-9
Used salt bath B-V co-penetrant is by lanthana（La2O3）0g, boron oxide（B2O3）51g, sodium fluoride（NaF）26g, five
V 2 O（V2O5）10g, barium chloride（BaCl2）8g, boron carbide（B4C）5g is formed.
Boron-vanadium co-penetration technique is：Specimen surface pretreatment-boron-vanadium co-penetration processing-washed samples
（1）According to boron-vanadium co-penetration agent prescription mass percent weigh raw material and mechanical mixture it is uniform after be put into it is standby in crucible；
（2）Matrix material pre-processes：Matrix material of the present invention selects 42CrMo steel, first by raw material wire cutting into 10 × 10 ×
The sample of 3mm sizes, surface carry out sand paper polishing and mechanical polishing after oil removing, deionized water cleaning, surface are thrown to coarse
Spend and beRa1 μm, then acetone ultrasonic wave cleaning 10min, alcohol flushing drying, are made sample；
（3）Boron-vanadium co-penetration processing：Raw material after will be well mixed is poured into corundum crucible, is warming up to 1000 DEG C of temperature, Ran Houbao
15 min of temperature make penetration enhancer melt uniformly, are then cooled to 950 DEG C, and B-V co-penetrant is made；Sample is put into the penetration enhancer got ready
In salt bath, and the groundwork face of sample is set to keep vertical with salt bath flow direction as far as possible, held for some time 4h takes out oil quenching,
Boron vanadium layers are made in 42CrMo steel surfaces；
（4）Washed samples：Sample is gently tapped, the residual salt in its surface is come off, if still there is residual salt to adhere to, can be heated to water bath
100 DEG C are boiled 1h or so；
Take out sample to be detected, the thickness of scanned Electronic Speculum test boron-vanadium co-penetration layer is 129 μm；Layer surface microhardness is
2173.8HV；XRD things phase is similar to embodiment one；The interface binding power of matrix and infiltration layer is 55N, and rubbed abrasion tester is surveyed
It is about 0.25 to obtain specimen surface coefficient of friction.
Part that the present invention does not relate to is identical or can be realized using prior art in prior art.
Claims (7)
1. a kind of lanthana urges the big infiltration layer oozed, high quality salt bath B-V co-penetrant, it is characterised in that it is with boron oxide（B2O3）
For the salt bath B-V co-penetrant of base salt, mainly by boron oxide（B2O3）, sodium fluoride（NaF）, boron carbide（B4C）, barium chloride
（BaCl2）, vanadic anhydride（V2O5）And lanthana（La2O3）Composition；The mass fraction of each component is respectively：Boron oxide（B2O3）
50.49% ~ 51%, sodium fluoride（NaF）25.74% ~ 26%, vanadic anhydride（V2O5）9.9 ~ 10%, barium chloride（BaCl2）7.92~8%、
Boron carbide（B4C）4.95 ~ 5%, lanthana（La2O3）0.2 ~ 1%, the mass percent sum of each component is 100%.
2. salt bath B-V co-penetrant according to claim 1, it is characterized in that adding La2O3Both catalytic action, which can have been played, to be made instead
It should carry out thoroughly, can also serving to urge and oozing to obtain thicker infiltration layer.
3. salt bath B-V co-penetrant according to claim 1, it is characterized in that described B2O3Pure to analyze, its content is not small
In 90%；V2O5Pure to analyze, content is not less than 99.5%；B4C content is not less than 90%；La2O3For high purity reagent.
4. a kind of co-infiltrating method of the salt bath B-V co-penetrant based on described in claim 1, it is characterised in that it includes following step
Suddenly：
（1）Mass percent according to the salt bath boron-vanadium co-penetration agent prescription described in claim 1 weighs raw material and mechanical mixture is equal
It is put into after even standby in crucible；
（2）Matrix material pre-processes：Matrix material is processed into the sample of required size first, surface is through oil removing, deionized water
Sand paper polishing and mechanical polishing are carried out after cleaning, surface is thrown to roughness isRa1 μm, then acetone ultrasonic wave cleaning at least
10min, then dried up with alcohol flushing, sample is made；
（3）Boron-vanadium co-penetration processing：Crucible is placed in heater box and is warming up to 1000 ± 50 DEG C, being then incubated 15 ± 5 min makes salt
Bath B-V co-penetrant each component melts uniformly, is then cooled to 950 DEG C, and B-V co-penetrant is made；Sample is put into and matches somebody with somebody what is got ready
Salt bath processing is carried out in B-V co-penetrant, and the groundwork face of sample is kept vertical with salt bath flow direction, insulation 4 ±
0.5h takes out oil quenching, i.e., in matrix material（42CrMo steel）Boron vanadium layers are made in surface；
（4）Washed samples：Sample is gently tapped, the residual salt in its surface is come off, if still there is residual salt to adhere to, is heated to water bath
100 DEG C are boiled 1 ± 0.5h or so.
5. according to the method for claim 4, it is characterized in that after the salt bath B-V co-penetrant prepared is well mixed before experiment
It is placed in corundum crucible and is capped, then is put into high-temperature seal adhesive sealing in baking oven and 45min drying is incubated in 100 DEG C.
6. according to the method for claim 4, it is characterized in that the sample of taking-up is carried out into oil quenching, specimen surface cleaning after experiment
After clean 2h is tempered at 180 DEG C.
7. according to the method for claim 4, it is characterized in that matrix material is 42CrMo steel.
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|---|---|---|---|---|
| JP2012031480A (en) * | 2010-07-30 | 2012-02-16 | Daito Kogyo Kk | Surface treatment method for iron alloy material |
| CN106367715A (en) * | 2016-09-12 | 2017-02-01 | 江苏大学 | Metallic titanium surface salt-bath vanadizing agent and vanadizing method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012031480A (en) * | 2010-07-30 | 2012-02-16 | Daito Kogyo Kk | Surface treatment method for iron alloy material |
| CN106367715A (en) * | 2016-09-12 | 2017-02-01 | 江苏大学 | Metallic titanium surface salt-bath vanadizing agent and vanadizing method |
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| 吉泽升著: "《多元渗硼技术及其应用》", 30 April 2004, 冶金工业出版社 * |
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