CN103266297A - Novel salt bath vanadizing method and novel salt bath vanadizing agent - Google Patents
Novel salt bath vanadizing method and novel salt bath vanadizing agent Download PDFInfo
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- CN103266297A CN103266297A CN 201310197621 CN201310197621A CN103266297A CN 103266297 A CN103266297 A CN 103266297A CN 201310197621 CN201310197621 CN 201310197621 CN 201310197621 A CN201310197621 A CN 201310197621A CN 103266297 A CN103266297 A CN 103266297A
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Abstract
The invention discloses a novel salt bath vanadizing method which comprises the following steps of: weighing 88wt% of anhydrous borax, 8wt% of vanadium pentoxide and 4wt% of aluminum, wherein the weight of the anhydrous borax is calculated according to the test result of the water content of the supplied borax; and when in preparation, adding the borax into a crucible, heating the hydrous borax to 950 DEG C, preserving heat for 4 hours, adding vanadium pentoxide, and adding aluminum 10-20 minutes later. By vanadizing on several steel surfaces through two different types of salt baths (borax salt bath and mixed salt bath) and comparing the texture and performance of the vanadizing coating, the mixed salt bath (the mixed vanadizing agent provided by the invention) has faster vanadizing than borax salt bath vanadizing under the same technological conditions, and can reduce the treatment temperature. The grain size of the mixed salt bath vanadizing layer is smaller than that of the borax salt bath, and the hardness of the vanadizing layer is higher than that of the borax salt bath.
Description
Technical field
The present invention relates to a kind of new salt bath vanadizing method, relate to a kind of new salt bath vanadizing agent simultaneously.
Background technology
The salt bath vanadizing technique functions comes from Japan, have another name called molten salt diffusion metallizing, vanadinizing, TD technology, since TD method salt bath metallic cementation was developed in Toyota research centre in 1972, its vanadinizing layer enjoyed countries in the world to pay attention to because having premium propertiess such as high rigidity, high-wearing feature always.Japan's original adoption be to be the acid borax salt bath of basic salt with borax, the major advantage of this salt bath is that density is big, the salt bath segregation is little, vitrified borax can with the oxide compound reaction of metallic surface, can clean workpiece surface, promote coating to form.But this salt bath fusing point is higher, and is mobile poor, and residual salt cleans difficult, and bigger to the corrodibility of crucible and anchor clamps, thereby causes defectives such as equipment life is low.Ooze through TD with high-carbon high-alloy steel and to cover processing, surface hardness only can reach 2000-3000HV.
Summary of the invention
By our development for many years to novel vanadinizing agent, a kind of hardened layer that makes workpiece surface form 3200-3600HV now is provided, and has the salt bath vanadizing method of high performances such as wear-resisting bite-resistant.
Described new salt bath vanadizing method, its inventive point is:
A kind of new salt bath vanadizing method
The vanadinizing agent that vanadinizing process is wherein used is prepared according to following process
At first, borax, Vanadium Pentoxide in FLAKES and aluminium are weighed up by following proportioning respectively, its weight percent is: Borax pentahydrate 88%, and Vanadium Pentoxide in FLAKES 8%, aluminium 4%, Borax pentahydrate weight should be calculated according to the assay of the water content of the borax of supply:
During preparation, should at first in crucible, add borax, and hydrous borax is heated to 950 ℃ of insulations 4 hours, add Vanadium Pentoxide in FLAKES then, add aluminium behind the 10-20min.
New salt bath vanadizing agent is prepared according to following process
At first, borax, Vanadium Pentoxide in FLAKES and aluminium are weighed up by following proportioning respectively, its weight percent is: Borax pentahydrate 88%, and Vanadium Pentoxide in FLAKES 8%, aluminium 4%, Borax pentahydrate weight should be calculated according to the assay of the water content of the borax of supply:
?
During preparation, should at first in crucible, add borax, and hydrous borax is heated to 950 ℃ of insulations 4 hours, add Vanadium Pentoxide in FLAKES then, add aluminium behind the 10-20min.
The salt bath vanadizing method of Cr12MoV steel: at first, borax, Vanadium Pentoxide in FLAKES and aluminium are weighed up by following proportioning respectively, and its weight percent is: Borax pentahydrate 88%, Vanadium Pentoxide in FLAKES 8%, aluminium 4%, Borax pentahydrate weight should be calculated according to the assay of the water content of the borax of supply:
During preparation, should at first in crucible, add borax, and hydrous borax is heated to 950 ℃ of insulations 4 hours, add Vanadium Pentoxide in FLAKES then, add aluminium behind the 10-20min, the salt bath vanadizing of Cr12MoV steel oil quenching and 180 ℃ * 2h tempering behind 980 ℃ of insulation 5h is handled.
Add man-hour, except the preparation steps of this vanadinizing agent, other step all can adopt those of ordinary skills' mode known or that expect easily to operate.Use the product that produces with conventional processing means at home after the present technique to be better than imported product fully.
Adopt borax salt bath and two kinds of dissimilar salt baths of mixed salt-bath to carry out vanadinizing on several steel surface, and tissue, the performance of vanadinizing coating compared, find that mixed salt-bath provided by the invention (being mixing vanadinizing provided by the invention agent) is faster than the speed of borax salt bath vanadizing, and can reduce treatment temp.
Under the same process condition, the grain fineness number of mixed salt-bath vanadinizing layer is littler than borax salt bath, and the height of the hardness ratio borax salt bath of vanadinizing layer.
This technology successful Application and has obtained extremely excellent result of use to class moulds such as the stretching of industries such as automobile, household electrical appliances, five metals, tubulation, metallurgy, bending, flange, rolling formation, cold-heading, powder metallurgy.Especially to some special component that not only required high abrasion but also required high tenacity, the product that uses after the present technique at home the processing means with routine to produce is better than imported product fully.
Embodiment
Embodiment 1
At first, borax, Vanadium Pentoxide in FLAKES and aluminium are weighed up by following proportioning respectively, its weight percent is: Borax pentahydrate 88%, and Vanadium Pentoxide in FLAKES 8%, aluminium 4%, Borax pentahydrate weight should be calculated according to the assay of the water content of the borax of supply.
During preparation, should at first in crucible, add borax, and hydrous borax is heated to 950 ℃ of insulations 4 hours, add Vanadium Pentoxide in FLAKES then, add aluminium behind the 10-20min.After the TD salt bath vanadizing of oil quenching and 180 ℃ * 2h tempering behind 980 ℃ of insulation 5h is handled, can form the Cr12MoV steel by what the compound that contains V and C was formed and thickly be about the surperficial infiltration layer of 11.41 μ mN, and alloying layer thickness even compact and be metallurgical binding with matrix.Simultaneously, the surface hardness of infiltration layer makes the wear resisting property of material be greatly improved up to 3600Hv.And under the identical condition of other technologies, adopt common borax salt bath vanadizing, and the surperficial infiltration layer that obtains is 8.42 μ mN only, and surface hardness is 2800 Hv only.It is 3 times of borax salt bath vanadizing layer that mixing vanadinizing provided by the invention agent comes the grain fineness number of salt bath vanadizing layer, and the height of the hardness ratio borax salt bath of vanadinizing layer.
2
Embodiment 2
T10A steel seamless steel tube cold-drawn internal mold after this technical finesse, 1. can improve die life more than 5 times (with hard chrome plating relatively) reduce mould consumption greatly, improve hour operating rate; 2. because die surface hardness height, smooth finish are good, under the situation that guarantees steel pipe inwall quality, can make yield rate improve 15-30%; 3. its appearance has replaced cold-drawn internal mold chromium plating traditional technology, and then has eliminated the environmental pollution that chromium plating causes.
Embodiment 3
H13 steel automobile connecting bar hot-forging die is after this technical finesse, and the life-span can be improved 4 times.Through the 4Cr5MoSiV1 of this technical finesse steel die, when be used for forging copper alloy, the life-span is 6 times of W6Mo5Cr4V2 steel of Q-tempering.Roll forming can not produce adhesion with oozing on the roll when covering this technology carbide coating even be not coated with lubricant yet, not only improves roll campaign, and has reduced the environmental pollution of lubricant.
This salt bath vanadizing treatment technology is applied to the mould manufacture view: be to utilize its high abrasion, anti-stick property on the one hand, fundamentally solve shaping class mould and pull workpiece or sizing problem as the surface of moulds such as stretching, bending, flange, rolling forming, die casting, improve the quality of products, and significantly improve die life; Be to utilize its high-wear resistance on the other hand, increase substantially the work-ing life that causes tool and mould or the workpiece of inefficacy because of all kinds of wearing and tearing, as moulds such as stamping-out, cold-heading, powder compression.
Claims (3)
1. new salt bath vanadizing method is characterized in that:
The vanadinizing agent that vanadinizing process is wherein used is prepared according to following process
At first, borax, Vanadium Pentoxide in FLAKES and aluminium are weighed up by following proportioning respectively, its weight percent is: Borax pentahydrate 88%, and Vanadium Pentoxide in FLAKES 8%, aluminium 4%, Borax pentahydrate weight should be calculated according to the assay of the water content of the borax of supply:
During preparation, should at first in crucible, add borax, and hydrous borax is heated to 950 ℃ of insulations 4 hours, add Vanadium Pentoxide in FLAKES then, add aluminium behind the 10-20min.
2. new salt bath vanadizing agent according to claim 1 is characterized in that:
According to following process preparation
At first, borax, Vanadium Pentoxide in FLAKES and aluminium are weighed up by following proportioning respectively, its weight percent is: Borax pentahydrate 88%, and Vanadium Pentoxide in FLAKES 8%, aluminium 4%, Borax pentahydrate weight should be calculated according to the assay of the water content of the borax of supply:
?
During preparation, should at first in crucible, add borax, and hydrous borax is heated to 950 ℃ of insulations 4 hours, add Vanadium Pentoxide in FLAKES then, add aluminium behind the 10-20min.
3. new salt bath vanadizing agent according to claim 1, the salt bath vanadizing method that it is characterized in that the Cr12MoV steel: at first, borax, Vanadium Pentoxide in FLAKES and aluminium are weighed up by following proportioning respectively, its weight percent is: Borax pentahydrate 88%, Vanadium Pentoxide in FLAKES 8%, aluminium 4%, Borax pentahydrate weight should be calculated according to the assay of the water content of the borax of supply:
During preparation, should at first in crucible, add borax, and hydrous borax is heated to 950 ℃ of insulations 4 hours, add Vanadium Pentoxide in FLAKES then, add aluminium behind the 10-20min, the salt bath vanadizing of Cr12MoV steel oil quenching and 180 ℃ * 2h tempering behind 980 ℃ of insulation 5h is handled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310197621 CN103266297A (en) | 2013-05-24 | 2013-05-24 | Novel salt bath vanadizing method and novel salt bath vanadizing agent |
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| CN 201310197621 CN103266297A (en) | 2013-05-24 | 2013-05-24 | Novel salt bath vanadizing method and novel salt bath vanadizing agent |
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| CN103266297A true CN103266297A (en) | 2013-08-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107858637A (en) * | 2017-12-11 | 2018-03-30 | 马鞍山蓝科再制造技术有限公司 | A kind of method of steel mold salt bath vanadizing |
-
2013
- 2013-05-24 CN CN 201310197621 patent/CN103266297A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107858637A (en) * | 2017-12-11 | 2018-03-30 | 马鞍山蓝科再制造技术有限公司 | A kind of method of steel mold salt bath vanadizing |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130828 |
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| WD01 | Invention patent application deemed withdrawn after publication |