CN107794494A - A kind of solid powder method chromizing technique and diffusion agent formulation - Google Patents
A kind of solid powder method chromizing technique and diffusion agent formulation Download PDFInfo
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- CN107794494A CN107794494A CN201710901570.1A CN201710901570A CN107794494A CN 107794494 A CN107794494 A CN 107794494A CN 201710901570 A CN201710901570 A CN 201710901570A CN 107794494 A CN107794494 A CN 107794494A
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- Prior art keywords
- solid powder
- penetration enhancer
- chromizing
- agent formulation
- diffusion agent
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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
- C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
- C23C10/34—Embedding in a powder mixture, i.e. pack cementation
- C23C10/36—Embedding in a powder mixture, i.e. pack cementation only one element being diffused
- C23C10/38—Chromising
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- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
Abstract
The present invention discloses a kind of solid powder method chromizing technique and diffusion agent formulation, and solid powder diffusion agent formulation includes by mass percentage：20~40% pure chromium powder, 58~78% alundum (Al2O3) and 1~3% ammonium chloride；Dry blast is carried out to part chromized surface using dry blowing machine, part is loaded into Muffle pot bottom after dry blast, Muffle pot is heated, is incubated, cool down completion part chromising；The solid powder method chromizing technique and diffusion agent formulation of the present invention, penetration enhancer raising workpiece is anti-oxidant, corrosion resistance；The Chromizing Layer case hardness prepared by chromizing technique can reach 1200~1500HV, improve the anti-wear performance of workpiece, chromizing technique simple flow, process, steady quality.
Description
Technical field
The invention belongs to metallic cementation field, it is related to chemical vapour deposition technique, and in particular to a kind of solid powder method chromising
Technique and diffusion agent formulation.
Background technology
The tumbler of long-term work under marine environment, should there is stronger decay resistance, possess again certain resistance to
Mill property, in general coating are difficult the advantages of possessing both, select solid powder method chromising technology to solve the above problems very well.
The content of the invention
Easy present invention aims at a kind of dispensing is provided, easy to operate solid powder method chromizing technique and penetration enhancer are matched somebody with somebody
Side, for the gas phase metallic cementation of blade inner chamber, the surface energy of workpiece obtains uniform Chromizing Layer, enhances the antiseptic property of part
And anti-wear performance, improve the service life of part.
To reach above-mentioned purpose, the present invention, which adopts the following technical scheme that, to be achieved：
A kind of solid powder diffusion agent formulation, includes by mass percentage：20~40% pure chromium powder, 58~78%
Alundum (Al2O3) and 1~3% ammonium chloride.
Further, Cr content >=98% in described pure chromium powder, particle diameter are 200 mesh.
Further, described alundum (Al2O3) is calcination type α-al2o3powder, and particle diameter is 120~220 mesh.
Further, described ammonium chloride is pure to analyze.
The technique that chromising is carried out to part, comprises the following steps：
Step 1: it is sealed after taking the appropriate penetration enhancer of configuration to carry out ball milling, drying stand-by；
Step 2: carrying out dry blast to part chromized surface using dry blowing machine, sand mold is alundum (Al2O3), after dry blast
The residual sand of piece surface is removed with drying compressed air；
Step 3: part to be loaded to the magazine for completing penetration enhancer, magazine is placed in Muffle pot bottom, tank body vacuumized, very
Reciprocal of duty cycle -0.01MPa, Muffle pot is heated to 980 ± 10 DEG C, soaking time 5~7 hours, after insulation terminates, cooled to the furnace
Less than 680 DEG C air coolings of coming out of the stove, complete part chromising.
Further, penetration enhancer is placed in ceramic pot in the step 1, using ball mill ball milling 8~12 hours.
Further, the penetration enhancer after ball milling is put into drying in oven in the step 1,1 is incubated at a temperature of 100~120 DEG C
~1.5h, being sealed after drying is stand-by.
Further, dry blast, blowing machine blast≤0.2MPa are carried out in the step 2 to part chromized surface；Three oxidations
Two aluminium particle sizes are 120~220 mesh.
Further, appropriate penetration enhancer is laid in magazine bottom in the step 3, part is embedded among penetration enhancer；Magazine
Penetration enhancer thickness >=25mm of bottom, penetration enhancer filling thickness >=20mm between part and part, part and magazine inwall.
The solid powder method chromizing technique and diffusion agent formulation of the present invention, penetration enhancer raising workpiece is anti-oxidant, corrosion resistance；Through
The Chromizing Layer case hardness for crossing chromizing technique preparation can reach 1200~1500HV, improve the anti-wear performance of workpiece, chromizing technique
Simple flow, process, steady quality.
Brief description of the drawings
Fig. 1 parts and penetration enhancer putting position schematic diagram
The metallographic structure figure of Fig. 2 Chromizing Layers
Fig. 3 solid powder method chromizing technique flow charts
In figure：1- magazines；2- parts；3- penetration enhancers.
Embodiment
With reference to the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Description, embodiment described herein is only the part of the embodiment of the present invention, and not all embodiment.Based on this hair
Embodiment in bright, the every other embodiment that those of ordinary skill in the art are obtained under the premise of no creative work,
Belong to the scope of the present invention.
% meters include solid powder diffusion agent formulation by mass percentage：
Pure chromium powder：20-40% (Cr content >=98%, mesh number：200 mesh)
Alundum (Al2O3)：58%-78% (calcination type α-al2o3powder, mesh number：120~220 mesh)
Ammonium chloride：1-3% (analysis is pure)
Solid powder method chromizing technique comprises the following steps：
1st, ball milling
The appropriate penetration enhancer of configuration is placed in ceramic pot, diameter about 30mm 6 pieces~9 pieces of Ceramic Balls are placed, using rolling bar
Formula ball mill, ball milling 8~12 hours.
2nd, dry
Penetration enhancer after ball milling is put into drying in oven, temperature：100~120 DEG C, 1~1.5h is incubated, will be close after drying
Envelope is stored in polybag, stand-by.
3rd, dry blast
Blast, design parameter are carried out to part chromized surface using dry blowing machine：
Sand mold：Alundum (Al2O3)；
Blowing machine blast：≤0.2MPa；
Granularity：120~220 mesh
The residual sand of piece surface is removed with dry compressed air.
4th, chromising
Appropriate penetration enhancer is laid in magazine bottom, part is embedded among penetration enhancer；The penetration enhancer thickness of magazine bottom >=
Penetration enhancer filling thickness >=20mm between 25mm, part and part, part and magazine inwall, as shown in Figure 1.
Part is loaded to the magazine for completing penetration enhancer, magazine is placed in Muffle pot bottom.Tank body is vacuumized using mechanical pump,
Vacuum -0.01MPa (pressure gauge), tank will be oozed and be heated to chromising holding temperature.
Holding temperature：980±10℃
Soaking time：5~7 hours, after insulation terminates, cool to less than 680 DEG C air coolings of coming out of the stove with the furnace.
Metallographic Analysis shows：Infiltration layer is fine and close, uniform continuity is preferable, 5~6 μm of depth.
Spectral detection shows：Chromium content 70~80% (wt).
Technical process is as shown in Figure 3.
Embodiment 1
Penetration enhancer：3 kilograms of penetration enhancer
Chromising temperature：970 DEG C, insulation 7 hours
As a result：As shown in Fig. 2 6~8 μm of blade surface alloying layer thickness, diffusion layer organization is uniformly, continuously；Cobalt element content
70%.
Embodiment 2
Penetration enhancer：5 kilograms of penetration enhancer
Chromising temperature：980 DEG C, insulation 6 hours
As a result：6~8 μm of alloying layer thickness, diffusion layer organization is uniformly, continuously；Cobalt element content 76%.
Embodiment 3
Penetration enhancer：5 kilograms of penetration enhancer
Chromising temperature：990 DEG C, insulation 5 hours
As a result：5~6 μm of alloying layer thickness, diffusion layer organization is uniformly, continuously；Cobalt element content 78%.
Above example is merely to illustrate technical scheme rather than its limitations, although with reference to above-described embodiment pair
The present invention is described in detail, and those of ordinary skill in the art can still be carried out to specific embodiments of the present invention
Modification or equivalent substitution, and these are without departing from any modification of spirit and scope of the invention or equivalent substitution, it exists
Within the claims of the present invention.
Claims (9)
1. a kind of solid powder diffusion agent formulation, it is characterised in that include by mass percentage：20~40% pure chromium powder, 58
~78% alundum (Al2O3) and 1~3% ammonium chloride.
2. solid powder diffusion agent formulation according to claim 1, it is characterised in that：Cr contents in described pure chromium powder >=
98%, particle diameter is 200 mesh.
3. solid powder diffusion agent formulation according to claim 1, it is characterised in that：Described alundum (Al2O3) is calcination type
α-al2o3powder, particle diameter are 120~220 mesh.
4. solid powder diffusion agent formulation according to claim 1, it is characterised in that：Described ammonium chloride is pure to analyze.
5. the technique that chromising is carried out to part using the solid powder penetration enhancer of claim 1, it is characterised in that comprise the following steps：
Step 1: it is sealed after taking the appropriate penetration enhancer of configuration to carry out ball milling, drying stand-by；
Step 2: carrying out dry blast to part chromized surface using dry blowing machine, sand mold is alundum (Al2O3), with dry after dry blast
Dry compressed air removes the residual sand of piece surface；
Step 3: part to be loaded to the magazine for completing penetration enhancer, magazine is placed in Muffle pot bottom, tank body is vacuumized, vacuum-
0.01MPa, Muffle pot is heated to 980 ± 10 DEG C, soaking time 5~7 hours, after insulation terminates, cool to the furnace 680 DEG C with
Under come out of the stove air cooling, complete part chromising.
6. solid powder method chromizing technique according to claim 5, it is characterised in that：Penetration enhancer is placed in the step 1
In ceramic pot, using ball mill ball milling 8~12 hours.
7. solid powder method chromizing technique according to claim 5, it is characterised in that：By after ball milling in the step 1
Penetration enhancer is put into drying in oven, and 1~1.5h is incubated at a temperature of 100~120 DEG C, and being sealed after drying is stand-by.
8. solid powder method chromizing technique according to claim 5, it is characterised in that：To part chromising in the step 2
Surface carries out dry blast, blowing machine blast≤0.2MPa；Alundum (Al2O3) granularity is 120~220 mesh.
9. solid powder method chromizing technique according to claim 5, it is characterised in that：Appropriate is oozed in the step 3
Agent is laid in magazine bottom, and part is embedded among penetration enhancer；Penetration enhancer thickness >=25mm of magazine bottom, part and part, part
Penetration enhancer filling thickness >=20mm between magazine inwall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710901570.1A CN107794494A (en) | 2017-09-28 | 2017-09-28 | A kind of solid powder method chromizing technique and diffusion agent formulation |
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| CN201710901570.1A CN107794494A (en) | 2017-09-28 | 2017-09-28 | A kind of solid powder method chromizing technique and diffusion agent formulation |
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| CN107794494A true CN107794494A (en) | 2018-03-13 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112159954A (en) * | 2020-10-29 | 2021-01-01 | 中国航发南方工业有限公司 | Aluminizing agent and application thereof |
| CN112195437A (en) * | 2020-10-29 | 2021-01-08 | 中国航发南方工业有限公司 | Aluminum-chromium co-permeation agent and application thereof |
| CN115058684A (en) * | 2022-06-29 | 2022-09-16 | 中国航发动力股份有限公司 | Preparation method of chromium hardened layer of high-carbon tool steel |
| CN115181931A (en) * | 2022-07-07 | 2022-10-14 | 湖南申亿精密零部件股份有限公司 | Wear-resistant penetrated layer surface treatment process |
| CN115323317A (en) * | 2022-08-12 | 2022-11-11 | 西安理工大学 | Preparation method of chromizing steel collar, chromizing agent and preparation method thereof |
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| US20130269837A1 (en) * | 2012-04-17 | 2013-10-17 | Lidiya Omovna CHUNYAYEVA | Composition and method for diffusion alloying of ferrocarbon workpiece |
| CN106282913A (en) * | 2016-08-30 | 2017-01-04 | 中航动力股份有限公司 | The penetration enhancer slip of a kind of slip chromising and Chromizing Layer preparation method |
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Patent Citations (2)
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| US20130269837A1 (en) * | 2012-04-17 | 2013-10-17 | Lidiya Omovna CHUNYAYEVA | Composition and method for diffusion alloying of ferrocarbon workpiece |
| CN106282913A (en) * | 2016-08-30 | 2017-01-04 | 中航动力股份有限公司 | The penetration enhancer slip of a kind of slip chromising and Chromizing Layer preparation method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112159954A (en) * | 2020-10-29 | 2021-01-01 | 中国航发南方工业有限公司 | Aluminizing agent and application thereof |
| CN112195437A (en) * | 2020-10-29 | 2021-01-08 | 中国航发南方工业有限公司 | Aluminum-chromium co-permeation agent and application thereof |
| CN112159954B (en) * | 2020-10-29 | 2022-10-18 | 中国航发南方工业有限公司 | Aluminizing agent and application thereof |
| CN112195437B (en) * | 2020-10-29 | 2022-10-18 | 中国航发南方工业有限公司 | Aluminum-chromium co-permeation agent and application thereof |
| CN115058684A (en) * | 2022-06-29 | 2022-09-16 | 中国航发动力股份有限公司 | Preparation method of chromium hardened layer of high-carbon tool steel |
| CN115058684B (en) * | 2022-06-29 | 2024-02-09 | 中国航发动力股份有限公司 | Preparation method of chromium hardening layer of high-carbon tool steel |
| CN115181931A (en) * | 2022-07-07 | 2022-10-14 | 湖南申亿精密零部件股份有限公司 | Wear-resistant penetrated layer surface treatment process |
| CN115323317A (en) * | 2022-08-12 | 2022-11-11 | 西安理工大学 | Preparation method of chromizing steel collar, chromizing agent and preparation method thereof |
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Application publication date: 20180313 |
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