CN86108744A - Paste boron-doping agent and protective cover thereof - Google Patents
Paste boron-doping agent and protective cover thereof Download PDFInfo
- Publication number
- CN86108744A CN86108744A CN 86108744 CN86108744A CN86108744A CN 86108744 A CN86108744 A CN 86108744A CN 86108744 CN86108744 CN 86108744 CN 86108744 A CN86108744 A CN 86108744A CN 86108744 A CN86108744 A CN 86108744A
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- CN
- China
- Prior art keywords
- protective cover
- penetration enhancer
- prescription
- sic
- binding agent
- 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.)
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Abstract
A kind of prescription of stopping off paste boron-doping is characterized in that this prescription B consumption is low, can obtain stable two-phase BFe+BFe
2Structure oozes active better promoting agent owing to added in the prescription to urge, and boronizing process carries out soon, infiltration layer is dark.The protective cover that relates among the present invention is non-microcracked to have excellent protective with the trickling phenomenon.
Description
This paper has introduced a kind of stopping off paste boron-doping prescription, promptly is to apply one deck supercoat outside the penetration enhancer layer, can be in air the directly penetration enhancer and the protective cover prescription of the paste method boronising of pyroprocessing.
Various paste boron-doping prescriptions all are to be made of boron supplying agent, energizer, weighting agent, binding agent and protective cover, and the batching that relates in the prescription can be:
Boron supplying agent: B-Fe, B
4C.
Energizer: KBF
4, Al
2O
3, AlF
3, NaF, CaF
2, SiC, Na
2SiF
6, Na
3AlF
6, Na
3AlF
6+ CaF
2, Na
3AlF
6+ NaF.
Weighting agent: Al
2O
3, SiC.
Binding agent: dextrin, water glass, ethyl silicate, 1053 resins, polyvinyl acetal, modified phenolic resins, three oxidative ethanes, rosin alcohol.
Protective cover: the protective cover of borax composition, the protective cover that contains the glass composition, silicon carbide protective cover, anti-oxidant anti-decarburizing coating.
Prescription and the application thereof formed according to above batching have:
Steel grade prescription and treatment process infiltration layer concentration surface hardness weave construction
（mm） HvO.100
50% 0.0616 1263 pair of 20Cr paste composition
35CrM
B
4C35%CaF
20.069 1539 phases
37CrNi
15%Na
2SiF
60.077 1531 layers
45 binding agents: peach 0.120 1698
Steel grade prescription and treatment process depth of penetration surface hardness weave construction
35Cr glue solution 0.077 1482
2Crl3 920-940℃ 0.070 1730
45Cr 4 hours 0.108 1331
20 0.162 1422
It is low that the present invention's purpose is to develop a kind of boron consumption, and good penetrability can obtain stable and dark infiltration layer, and easy cleaned penetration enhancer and can overcome crizzle and the phenomenon of trickling has the protective cover prescription of fine provide protection.
Invention is achieved in that boron supplying agent adopts the higher B of boron gesture
4C also is equipped with NaF as energizer, and the present invention adds an amount of (NH in energizer
2)
2CO, NH
4HCO
3With anhydrous Na CO
3Can improve the activity of penetration enhancer like this, have more intensive and urge the effect of oozing, shorten the boronising time greatly, obtain stable darker boride layer, for making not sintering of penetration enhancer, easy cleaning, and required reducing atmosphere can cause boronising the time, also add activated carbon and wooden carbon dust partly among the filler SiC of the present invention.The protective layer batching is based on SiC in the invention, is equipped with an amount of SiO
2Allotment forms with refractory powder, uses SiC as protective layer the tiny crack phenomenon to be arranged at high temperature separately, and its sealing effectiveness is bad, and the inventor has utilized SiO just
2Solidify being under 900 ℃ of temperature under this characteristic of little melt, the tiny crack sealing of SiC can not caused surface trickling phenomenon with a certain amount of refractory powder.Its operating process is all solids penetration enhancer and solid protective material to be prepared respectively in proportion the binding agent of mixing thoroughly is slowly poured into after mixing 200 orders that sieve again; and constantly stir that transfer to can the pull-up silk; till not trickling; and with processed workpiece deburring and surface derusting; after dehydrated alcohol (99.5%) the cleaning degreasing penetration enhancer evenly is coated in thick approximately 2mm on the workpiece; shady dried to again the protective cover that mixes up being coated in thick approximately 2mm on the penetration enhancer layer firmly, can shadyly do or dry below 100 ℃.At this moment can directly put into the stove processing or place the high-frequency induction coil processing to get final product, for the way of the also available flame local heating of Local treatment.
Various batchings proportioning in the present invention percentage ratio is by weight counted: 20%B
4C, 15%NaF, 8%(NH
2)
2CO, 3%NH
4HCO
3, 1% anhydrous Na CO
3, the SiC surplus, 2% activated carbon, 8% wooden carbon dust, binding agent is an amount of.
Protective cover proportioning: 75%SiC, 5%SiO
2, 20% refractory powder binding agent is an amount of.It is few to adopt this kind proportioning to have the boron supplying agent consumption as penetration enhancer and protective cover boronising, and the penetration enhancer activity is good, and infiltration layer boron pin is long, and the protective layer good airproof performance oozes characteristics such as back easy cleaning, and can obtain stable two-phase BFe+BFe
2Structure.
Description of drawings:
Figure (1) A
3Steel 6.4 * 40 shows little photo.
Figure (2) 45 steel 6.4 * 40 show little photo.
Figure (3) T10 steel 6.4 * 40 shows little photo.
Below further describe for example:
Press following proportioning system penetration enhancer and protective cover to the A3 steel, 45 steel, T10 steel are done boronising and are handled.
B
4C20% NaF15% （NH
2）
2CO8%
NH
4HCO
33%。
Anhydrous Na CO
31%, green SiC surplus, activated carbon 2%.
Wood carbon dust 8%, binding agent is an amount of.
Protective cover: green SiC75% SiO
25% refractory powder 20%
Binding agent is an amount of.
Each prepare burden specification and physicochemical data are as follows
Batching title B
4C NaF(NH
2)
2CO NH
4HCO
3Anhydrous Na CO
3
Fineness (order) 300 300 300 300 300
The purity technical pure
Chemical pure technical pure chemistry pure chemistry is pure
Abrasive material
Batching title SiC SiO
2Refractory powder activated carbon wood carbon
Fineness (order) 300 300 300 300 300
The purity technical pure
The former powder technical pure of technical pure technical pure
Abrasive material
Processing condition:
900 ℃ ± 5 ℃ of furnace temperature, the processed workpiece surface smoothness
6 give heat goes into stove during to 300～400 ℃ and handles 20 minutes quench treatment immediately of coming out of the stove, and takes out gently the knock-off crust and cleans in water with cotton yarn.
Observed result is as follows: (X-ray diffraction analysis)
Abrasive wear simultaneous test data are as follows:
Abrasive species: M
20(01
#) sand paper, 60 rev/mins of 150 seconds times of trier
860 ℃ of quenchings of sample, 180 ℃ of temper half an hour
Photomicrograph is as follows:
6.4×40 6.4×40 6.4×40
45
#Handle A in the steel stove
3The steel high frequency is handled T10 steel high frequency and is handled
20 minutes 20 minutes 30 minutes
Claims (3)
1, a kind of boronizing paste and protective cover thereof include B in this prescription penetration enhancer
4C, NaF, SiC and binder formulation include SiC and binding agent in the protective cover, it is characterized in that also being equipped with in the penetration enhancer (NH
2)
2CO, NH
4HCO
3, Na
2CO
3And activated carbon and wooden carbon dust, also be equipped with SiO in the protective cover
2And refractory powder.
2, according to the described penetration enhancer of claim (1), when it is characterized in that preparing penetration enhancer its proportioning by weight percentage ratio count: B
4C20%, NaF15%, (NH
2)
2CO8%, NH
4HCO
33%, anhydrous Na
2CO
31%, the SiC surplus, activated carbon 2%, wooden carbon dust 8%, binding agent is an amount of.
3, according to the described penetration enhancer of claim (1), when it is characterized in that preparing protective cover its proportioning by weight percentage ratio count SiC75%, SiO
25%, refractory powder 20%, binding agent is an amount of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86108744 CN86108744A (en) | 1986-12-17 | 1986-12-17 | Paste boron-doping agent and protective cover thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86108744 CN86108744A (en) | 1986-12-17 | 1986-12-17 | Paste boron-doping agent and protective cover thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86108744A true CN86108744A (en) | 1988-06-29 |
Family
ID=4804041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86108744 Pending CN86108744A (en) | 1986-12-17 | 1986-12-17 | Paste boron-doping agent and protective cover thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86108744A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1293227C (en) * | 2004-10-29 | 2007-01-03 | 武汉理工大学 | Quick preparation method of metal surface boronizing layer |
| WO2008100155A1 (en) * | 2007-02-15 | 2008-08-21 | Sinvent As | Self-protective boron containing paste and application of this on metal components |
| CN104746001A (en) * | 2014-03-24 | 2015-07-01 | 南京理工大学 | Method for boronization surface treatment of workpieces |
| CN106563927A (en) * | 2016-11-09 | 2017-04-19 | 安徽千禧精密轴承制造有限公司 | Machining technique for boriding bearing cylinder roller |
| CN110777248A (en) * | 2019-11-25 | 2020-02-11 | 华迪钢业集团有限公司 | Heat treatment process of seamless steel pipe |
| CN114277235A (en) * | 2021-12-03 | 2022-04-05 | 山东大众机械制造股份有限公司 | Heat treatment method of high-strength anti-fatigue engine connecting rod |
-
1986
- 1986-12-17 CN CN 86108744 patent/CN86108744A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1293227C (en) * | 2004-10-29 | 2007-01-03 | 武汉理工大学 | Quick preparation method of metal surface boronizing layer |
| WO2008100155A1 (en) * | 2007-02-15 | 2008-08-21 | Sinvent As | Self-protective boron containing paste and application of this on metal components |
| CN104746001A (en) * | 2014-03-24 | 2015-07-01 | 南京理工大学 | Method for boronization surface treatment of workpieces |
| CN104746001B (en) * | 2014-03-24 | 2017-06-27 | 南京理工大学 | A kind of surface treatment method that boronising is carried out to workpiece |
| CN106563927A (en) * | 2016-11-09 | 2017-04-19 | 安徽千禧精密轴承制造有限公司 | Machining technique for boriding bearing cylinder roller |
| CN110777248A (en) * | 2019-11-25 | 2020-02-11 | 华迪钢业集团有限公司 | Heat treatment process of seamless steel pipe |
| CN114277235A (en) * | 2021-12-03 | 2022-04-05 | 山东大众机械制造股份有限公司 | Heat treatment method of high-strength anti-fatigue engine connecting rod |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |