CN106282910A - Niobium reinforcement process is oozed on bearing pin surface - Google Patents
Niobium reinforcement process is oozed on bearing pin surface Download PDFInfo
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- CN106282910A CN106282910A CN201610713171.8A CN201610713171A CN106282910A CN 106282910 A CN106282910 A CN 106282910A CN 201610713171 A CN201610713171 A CN 201610713171A CN 106282910 A CN106282910 A CN 106282910A
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- CN
- China
- Prior art keywords
- bearing pin
- niobium
- oozed
- reinforcement process
- layer
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Classifications
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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
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/18—Solid state diffusion of only metal elements or silicon into metallic material surfaces using liquids, e.g. salt baths, liquid suspensions
- C23C10/20—Solid state diffusion of only metal elements or silicon into metallic material surfaces using liquids, e.g. salt baths, liquid suspensions only one element being diffused
- C23C10/24—Salt bath containing the element to be diffused
Abstract
The invention discloses bearing pin surface and ooze niobium reinforcement process, (1) fine grinding bearing pin；(2) salt bath formula: the powdery niobium powder of 4 8%, the Borax of 92% 96% and a certain amount of reducing agent, weigh each component mix homogeneously；(3) add to load in resistant to elevated temperatures crucible after the bearing pin refined is sufficiently stirred for and seal, and in 950 1050 DEG C of environment, be incubated 4 6h, carry out oozing niobium；(4) the bearing pin furnace cooling after oozing niobium；(5) the bearing pin boiling water after cooling cooks off the abraum salt that top layer is remaining；(6) follow-up bearing pin is carried out conventional quenching and tempering.Having the advantage that seepage velocity is fast, ooze the wearability of niobium layer, antifraying property stronger than Chromizing Layer, infiltration layer is more uniform；Ooze the infiltration layer of niobium bearing pin compare chromising infiltration layer will more matter close, between infiltration layer and matrix, bond strength is more preferable, and surface strength is greatly improved, and improves anti-wear performance and shear strength.
Description
Technical field
The invention belongs to auto parts and components and manufacture field, can be in bigger load, corruption wear-resistant, anti-more particularly to one
Niobium reinforcement process is oozed on erosion, antioxidation, good and length in service life the chain hinge pin surface of fatigue behaviour.
Background technology
The development at full speed due to chain industry and parts are to the requirement of the performances such as wear-resisting, against corrosion, resistance to high temperature oxidation not
Disconnected raising, promotes the development of piece surface reinforcement process.Wherein, the development of piece surface metallic cementation is the rapidest with application.Mesh
Before more ripe surface intensified technique be surface chromising strengthening, although the performance of chromising piece surface has promoted, but ooze
The performance of layer is the most poor, and there is many weakness.Though the high temperature oxidation resistance of Chromizing Layer is good, but hardness is relatively low, wear-resisting
Property is poor, and deep delamination easily occurs, is all easily formed carbon-poor area, therefore is only applicable to underloading under the Chromizing Layer of low, medium carbon steel
The workpiece of lower work.
Summary of the invention
The technical problem to be solved is to provide one and avoids hardness in bearing pin chromizing technique low, and wearability is relatively
Difference, flaky deficiency, to design one and metallic cementation part can be made to bear bigger load, thermal fatigue property is good, high rigidity,
Niobium reinforcement process is oozed on the bearing pin surface of high-wearing feature.
For solving above-mentioned technical problem, niobium reinforcement process is oozed on the bearing pin surface that the present invention provides, and technique is as follows:
(1) fine grinding bearing pin；
(2) the powdery niobium powder of salt bath formula: 4-8%, the Borax of 92%-96% and a certain amount of reducing agent, weigh each component and mix
Close uniformly；
(3) add to load in resistant to elevated temperatures crucible after the bearing pin refined is sufficiently stirred for and seal, and protect in 950-1050 DEG C of environment
Temperature 4-6h, carries out oozing niobium；
(4) the bearing pin furnace cooling after oozing niobium；
(5) the bearing pin boiling water after cooling cooks off the abraum salt that top layer is remaining；
(6) follow-up bearing pin is carried out conventional quenching and tempering.
Niobium powder and oxygen reaction produce niobium pentaoxide (Nb2O5), part Borax high temperature thermal decomposition and produce diboron trioxide
(B203), salt bath now has niobium pentaoxide (Nb2O5) and diboron trioxide (B203) two oxides depositing.
Known each element oxide stability descending order is as follows:
Ca Mg Zr Al Ti Si B Cr Nb V W
Described reducing agent is to be arranged in each element before each element, diboron trioxide (B in two oxides203) the most
Stable, niobium pentaoxide (Nb2O5) stability is worst, after adding reducing agent in salt bath, be first reduced is niobium, if also
Former dose of excess its is possible to restore boron simultaneously, can respectively obtain the niobium of activity, niobium boron atom according to the consumption difference of reducing agent,
Niobium, niobium boron co-diffusion is oozed with realize steel.When carrying out unit and oozing niobium, if with aluminum as reducing agent, then in salt bath under main generation
Row chemical reaction:
2/5Nb2O5+4/3Al=4/5Nb+2/3Al2O3
The niobium atom of activity is obtained by above-mentioned chemical reaction.After workpiece immerses salt bath, the niobium atom of activity is adsorbed in steel simultaneously
Surface and inner layer diffusion, niobium carbon formation carbide just and in steel matrix subsequently.Owing to the carbon in carbide comes from base
Body, for still having enough phosphorus content after ensureing matrix metallic cementation, is unlikely to form local carbon-poor area, needs the pin for metallic cementation
Axle raw material has higher phosphorus content, and general phosphorus content is answered > 0.6%.
Further, the surface roughness of described bearing pin≤Ra0.1 μm.
Further, described bearing pin surface alloying layer thickness be 10-15 μm and alloying layer thickness uniform.
Further, described bearing pin material is GCr15 bearing steel.Through great many of experiments, analytical data is reached a conclusion, and uses
GCr15 bearing steel does the bearing pin of material and is superior to common iron matrix oozes niobium through oozing each impact of performance in niobium rear pin shaft surface
Effect.
Niobium reinforcement process is oozed compared with prior art in the bearing pin surface of the present invention, has the advantage that seepage velocity is fast, oozes
The wearability of niobium layer, antifraying property are stronger than Chromizing Layer, and infiltration layer is more uniform；Ooze the infiltration layer of niobium bearing pin to compare the infiltration layer of chromising and want
More matter is close, and between infiltration layer and matrix, bond strength is more preferable, and surface strength is greatly improved, and improves anti-wear performance and shears strong
Degree.
Accompanying drawing explanation
Fig. 1 is bearing pin metallograph after chromising processes；
Fig. 2 is bearing pin metallograph after oozing niobium and processing.
Detailed description of the invention
The invention will be further described to combine accompanying drawing below by embodiment.
Niobium reinforcement process is oozed on the bearing pin surface that the present embodiment provides, and is passed through by the bearing pin manufactured with GCr15 bearing steel material
Fine grinding；By salt bath formula: the powdery niobium powder of 4-8%, the Borax of 92%-96% and a certain amount of reducing agent Al, weigh each component also
Mix homogeneously；Add to load in resistant to elevated temperatures crucible after the bearing pin refined is sufficiently stirred for and seal, and in 950-1050 DEG C of environment
Insulation 4-6h, carries out oozing niobium；Bearing pin furnace cooling after oozing niobium；Bearing pin boiling water after cooling cooks off remaining the giving up in top layer
Salt；Follow-up bearing pin is quenched with tempering.
Known each element oxide stability descending order is as follows:
Ca Mg Zr Al Ti Si B Cr Nb V W
Diboron trioxide (B in two oxides203) the most stable, niobium pentaoxide (Nb2O5) stability is worst, when to salt bath
After middle addition reducing agent Al, be first reduced is niobium atom, oozes niobium with realize steel.
Infiltration layer 10-15 μm, infiltration layer is uniform, and bearing pin surface roughness≤Ra0.1 μm, nitrided layer hardness can reach 2500-
2800HV。
As shown in Figure 1-2, ooze the infiltration layer of niobium bearing pin compare chromising infiltration layer will more matter close, combine between infiltration layer and matrix
Intensity is more preferable, and surface strength is greatly improved, and improves anti-wear performance and shear strength.
Claims (7)
1. niobium reinforcement process is oozed on a bearing pin surface, it is characterised in that technique is as follows:
(1) fine grinding bearing pin；
(2) the powdery niobium powder of salt bath formula: 4-8%, the Borax of 92%-96% and a certain amount of reducing agent, weigh each component and mix
Close uniformly；
(3) add to load in resistant to elevated temperatures crucible after the bearing pin refined is sufficiently stirred for and seal, and protect in 950-1050 DEG C of environment
Temperature 4-6h, carries out oozing niobium；
(4) the bearing pin furnace cooling after oozing niobium；
(5) the bearing pin boiling water after cooling cooks off the abraum salt that top layer is remaining；
(6) follow-up bearing pin is carried out conventional quenching and tempering.
Niobium reinforcement process is oozed on bearing pin surface the most according to claim 1, it is characterised in that: niobium powder and oxygen reaction produce five
Aoxidize two niobiums, part Borax high temperature thermal decomposition and produce diboron trioxide, now salt bath has niobium pentaoxide and three oxidation two
Boron two oxides is also deposited.
Niobium reinforcement process is oozed on bearing pin surface the most according to claim 2, it is characterised in that: known each element oxide is stable
Property descending order is as follows: Ca Mg Zr Al Ti Si B Cr Nb V W, described reducing agent is for being arranged in before each element
Each element, in two oxides, diboron trioxide is the most stable, and niobium pentaoxide stability is worst, when in salt bath add
After reducing agent, be first reduced is niobium.
Niobium reinforcement process is oozed on bearing pin surface the most according to claim 2, it is characterised in that: the raw-material carbon containing of described bearing pin
Amount is more than 0.6%.
Niobium reinforcement process is oozed on bearing pin surface the most according to claim 2, it is characterised in that: the rough surface of described bearing pin
Degree≤Ra0.1 μm.
Niobium reinforcement process is oozed on bearing pin surface the most according to claim 2, it is characterised in that: described bearing pin surface infiltration layer is thick
Degree is uniform for 10-15 μm and alloying layer thickness.
Niobium reinforcement process is oozed on bearing pin surface the most according to claim 2, it is characterised in that: described bearing pin material is
GCr15 bearing steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610713171.8A CN106282910A (en) | 2016-08-24 | 2016-08-24 | Niobium reinforcement process is oozed on bearing pin surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610713171.8A CN106282910A (en) | 2016-08-24 | 2016-08-24 | Niobium reinforcement process is oozed on bearing pin surface |
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| Publication Number | Publication Date |
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| CN106282910A true CN106282910A (en) | 2017-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610713171.8A Pending CN106282910A (en) | 2016-08-24 | 2016-08-24 | Niobium reinforcement process is oozed on bearing pin surface |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115029660A (en) * | 2022-05-16 | 2022-09-09 | 泉州职业技术大学 | Strengthening treatment method for 40CrNiMo cutting pick body material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1876887A (en) * | 2006-07-07 | 2006-12-13 | 成都金品科技发展有限公司 | Metal workpiece with vanadium-niobium impregnated surface using borax molten salt as carrier and production method thereof |
| CN102808147A (en) * | 2012-09-05 | 2012-12-05 | 武汉力盾新材料科技有限公司 | Metallic carbide ceramic coating and preparation method thereof |
| CN105239037A (en) * | 2015-11-02 | 2016-01-13 | 杭州持正科技股份有限公司 | Chain pin shaft surface vanadinizing strengthening process |
-
2016
- 2016-08-24 CN CN201610713171.8A patent/CN106282910A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1876887A (en) * | 2006-07-07 | 2006-12-13 | 成都金品科技发展有限公司 | Metal workpiece with vanadium-niobium impregnated surface using borax molten salt as carrier and production method thereof |
| CN102808147A (en) * | 2012-09-05 | 2012-12-05 | 武汉力盾新材料科技有限公司 | Metallic carbide ceramic coating and preparation method thereof |
| CN105239037A (en) * | 2015-11-02 | 2016-01-13 | 杭州持正科技股份有限公司 | Chain pin shaft surface vanadinizing strengthening process |
Non-Patent Citations (1)
| Title |
|---|
| 宁夏西北轴承厂技术科: ""硼砂盐浴中渗铌的试验"", 《金属热处理》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115029660A (en) * | 2022-05-16 | 2022-09-09 | 泉州职业技术大学 | Strengthening treatment method for 40CrNiMo cutting pick body material |
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Application publication date: 20170104 |