CN101597728A - A kind of method of improving hot dipping Ni-based alloy coating property with solid solution aging - Google Patents
A kind of method of improving hot dipping Ni-based alloy coating property with solid solution aging Download PDFInfo
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- CN101597728A CN101597728A CNA2009100881535A CN200910088153A CN101597728A CN 101597728 A CN101597728 A CN 101597728A CN A2009100881535 A CNA2009100881535 A CN A2009100881535A CN 200910088153 A CN200910088153 A CN 200910088153A CN 101597728 A CN101597728 A CN 101597728A
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Abstract
The invention belongs to metallurgical technology field, relate to a kind of method of improving hot dipping Ni-based alloy coating property with solid solution aging.It is characterized in that: after process sandblast pretreatment of steel matrix surface and plating assistant agent are handled; be immersed in 980 ℃～1150 ℃ the nickel-base alloy plating bath; the immersion plating time is 0.5～60s, carries out naturally cooling under vacuum or protection of inert gas, obtains ni base alloy coating.Sample put into be connected with N
2Retort furnace in, in 850 ℃～950 ℃ temperature range, be incubated 5～10h and carry out solution treatment, cool off fast then.At last the sample after the solution treatment is put in 600 ℃～750 ℃ the stove, insulation 16～30h carries out ageing treatment, in the whole process, is connected with N in the stove
2, with the protection sample.After solid solution aging is handled, separated out the more hard phase on the Ni-based sosoloid, and disperse is evenly distributed on the Ni-based sosoloid, they have improved assurance for improving abrasion property, and behind solid solution aging, the toughness of coating obviously is improved simultaneously.
Description
Technical field
The invention belongs to metallurgical technology field, relate to a kind of method of improving the Ni-based total coating performance of hot dip process with thermal treatment.
Background technology
The method for preparing at present Ni-based coating has hot spray process, vacuum cladding method etc., but the limitation of self is all arranged.As: the Ni-based coating voidage of hot spray process preparation is bigger, and environmental pollution is more serious, and coating quality is low etc.; Vacuum cladding equipment used costliness, the production cycle is long, exists certain element volatilization phenomenon etc.The inventor prepares the nickel-base antiwear anti-corrosion coating with the method for hot dip process and has obtained very quantum jump (a kind of hot dip coating method for nickel base antifriction anticorrosion alloy now, application number: 200510011589.6), combine Research on effect with basal body interface and also obtained certain progress (a kind of method of improving carbon steel and nickel-base alloy bonding interface with plating assistant agent about improving the hot dip process ni base alloy coating in addition, application number: 200910081789.7) hot dip process nickel-base alloy technology biggest advantage is exactly that cost is low, with short production cycle, the production efficiency height, environmental pollution is little etc.Ni-based coating has good wear resistance and corrosion resistance, the material that can play with minute quantity plays the effect that a large amount of, expensive integral material is difficult to play, greatly reduce the tooling cost of product, improve the wrapped product quality, increase the service life, economize on resources and the energy thereby reach.The basic technology of hot dip process nickel-base alloy is: steel matrix is carried out surface preparation; make it expose fresh and have the surface of certain roughness; then its immersion had atmosphere protection and temperature range in 980 ℃～1150 ℃ Ni-based plating bath; the immersion plating time is 0.5～60s; then matrix is taken out from plating bath; under vacuum or protection of inert gas, carry out naturally cooling, obtain nickel alloy plating layer.
But at present eutectic structure is different and distribution is more mixed and disorderly in the hot dip process ni base alloy coating tissue, the toughness that shows as coating on the macroscopic view is relatively poor, in use cause cracking easily, increased the danger of coating hot tearing and cold cracking simultaneously, the skewness of hard in Ni-based sosoloid also is unfavorable for the raising of coating abrasion performance.
Summary of the invention
The purpose of this invention is to provide a kind of method of improving hot dipping Ni-based alloy coating property, i.e. solid solution aging.With the Ni-based coating process solution treatment for preparing, then it is carried out ageing treatment earlier, thereby can improve the tissue of hot dip process Ni-based coating and improve abrasion property.
A kind of method of improving hot dipping Ni-based alloy coating property with solid solution aging, it is characterized in that: the steel matrix surface is through sandblast pretreatment, cover one deck plating assistant agent by soaking then, after the moisture and crystal water in the oven dry plating assistant agent, be immersed in the nickel-base alloy plating bath, then matrix is taken out from plating bath, air cooling obtains ni base alloy coating, then in 850 ℃～950 ℃ temperature ranges, soaking time is that 5～10h carries out solution treatment, and insulation is cooled off after finishing fast, at last the sample after the solid solution is placed in 600 ℃～750 ℃ the stove, insulation 16～30h carries out ageing treatment.The composition weight percent of nickel-base alloy is Cr:5～20%, B:1～6%, and Si:1～6%, C:0～1.1%, Fe :≤10%, Ni: surplus.
The optimum combination that solid solution aging is handled is 950 ℃ the interior insulation of temperature range 5h, carries out solution treatment, and after insulation finished, sample cooled off fast.At last the sample after the solution treatment is put in 750 ℃ the stove, insulation 16h carries out ageing treatment, furnace cooling.
Concrete steps are as follows:
One, the plating pre-treatment on steel matrix surface
The steel matrix surface has greasy dirt, iron rust and oxide skin in transportation and storage, surfactivity is lower, must plate pre-treatment before its surface heat immersion plating nickel-base alloy.Therefore in order to obtain fresh and active high steel matrix surface, adopt sandblasting to remove greasy dirt, iron rust and the oxide skin on steel matrix surface, then it be immersed in the plating assistant agent aqueous solution, after for some time with its taking-up, at this moment oven dry has just obtained surperficial fresh, active higher steel matrix.
Two, hot dip process nickel-base alloy
At first carry out the melting of nickel-base alloy, Cr:5～20% by weight percentage, B:1～6%, Si:1～6%, C:0～1.1%, Fe :≤10%, Ni: surplus, prepare burden, and in fusion process, carry out atmosphere protection (N
2Protection); when material melt fully and plating bath clean after; the steel matrix of thorough drying immersed in 980 ℃～1150 ℃ the Ni-based plating bath; and make steel matrix and nickel-base alloy gas and impurity come-up at the interface by mobile steel matrix; thereby make between Ni-based plating bath and the steel matrix fully wetting with sprawl, to form the good binding interface.Steel matrix behind mobile 0.5～60s, is taken out from plating bath in plating bath, under vacuum or atmosphere protection, cool off, can guarantee that by mobile steel matrix the temperature on steel matrix surface is even, thereby the thickness of coating that obtains is even, smooth surface.
Three, solid solution aging is handled
The nickel base alloy carbon steel matrix material that utilizes hot dip coating method preparation put into be connected with N
2Retort furnace in, in 850 ℃～950 ℃ temperature range, be incubated 5～10h, carry out solution treatment, make surplus fully be dissolved in the Ni-based sosoloid back cooling fast mutually, obtain supersaturated solid solution, for ageing treatment is got ready.At last the sample after the solution treatment is put in 600 ℃～750 ℃ the stove, insulation 16～30h carries out ageing treatment, and furnace cooling, eliminate the internal stress of nickel-base alloy, stabilizing tissue and size make simultaneously that hard is mutually full and uniform separates out, thereby improve the wear resistance of Ni-based coating.
Four, end properties detects
Comparison diagram 1 and Fig. 2 find, behind the solid solution aging, have separated out the more hard phase on the Ni-based sosoloid, and disperse is evenly distributed on the Ni-based sosoloid, they have improved assurance for improving abrasion property, and behind solid solution aging, the toughness of coating obviously is improved simultaneously.
Sample behind original sample of hot dip process and the solid solution aging is made 20 * 20 * 12mm, they are carried out the erosive wear experiment.90 ° of erosion angles, time 10min, delivery medium pressurized air (air pressure 0.6MPa), abrasive material are that 24 order white fused alumina sand, nozzle diameter 7.5mm, sandblast are apart from 100mm.
Aqueous solution plating assistant agent provided by the invention has the following advantages:
(1) eutectic structure in the Ni-based coating tissue disappears, and the toughness of coating has obtained good raising, has reduced coating rimose probability in actual use like this.
(2) Ni-based coating obviously improves with the effect that combines between the steel matrix, and bonding force increases.
(3) hard is evenly distributed mutually in the Ni-based coating tissue, and the fritter shape disperse that is of hard phase is distributed in the Ni-based sosoloid, can improve abrasion property well.
Description of drawings
Fig. 1 is a hot dip process Ni-based coating original structure photo;
After Fig. 2 was solid solution aging, Ni-based coating was organized photo.
Embodiment
Embodiment 1:
One, the plating pre-treatment on steel matrix surface
At first, be abrasive material with white fused alumina sand, utilize sandblast machine that the iron rust and the oxide skin on steel matrix surface are removed, expose fresh steel matrix surface.Then, fresh steel matrix is immersed in the plating assistant agent aqueous solution for preparing, after immersion for some time, takes out oven dry.
Two, hot dip process nickel-base alloy
Before steel matrix immerses the nickel-base alloy plating bath; earlier the nickel-base alloy plating bath is carried out deep deoxidation; to remove the impurity on plating bath surface simultaneously; the steel matrix of finish-drying is immersed in 980 ℃～1150 ℃ the Ni-based plating bath; and keep steel matrix in plating bath, to move; take out matrix behind the 15s, under nitrogen protection, carry out naturally cooling then, analyze then.
Three, solid solution aging is handled
The nickel base alloy carbon steel matrix material of hot dip coating method preparation put into be connected with N
2Retort furnace in, in 850 ℃ temperature range, be incubated 5h, carry out solution treatment, after insulation finished, sample cooled off fast, obtains supersaturated solid solution, for ageing treatment is got ready.At last the sample after the solution treatment is put in 600 ℃ the stove, insulation 16h carries out ageing treatment, and furnace cooling, eliminate the internal stress of nickel-base alloy, stabilizing tissue and size, make simultaneously that hard is mutually full and uniform separates out, thereby improve the wear resistance of Ni-based coating.
Four, end properties detects
Sample after original sample of hot dip process and the solid solution aging processing is made 20 * 20 * 12mm, it is carried out the erosive wear experiment.The result shows that the abrasion loss of coating is 50% of the original coating of hot dip process behind the solid solution aging.
Embodiment 2:
The steel matrix of sandblasting is dipped in the plating assistant agent aqueous solution for preparing, after for some time, takes out dry; then it is immersed in 980 ℃～1150 ℃ the Ni-based plating bath; and keep steel matrix in plating bath, to move, and take out matrix behind the 10s, under nitrogen protection, carry out naturally cooling.The nickel base alloy carbon steel matrix material of hot dip coating method preparation put into be connected with N
2Retort furnace in, in 950 ℃ temperature range, be incubated 5h, carry out solution treatment, after insulation finished, sample cooled off fast.At last the sample after the solution treatment is put in 750 ℃ the stove, insulation 16h carries out ageing treatment, furnace cooling.
Embodiment 3:
The steel matrix of sandblasting is dipped in the plating assistant agent aqueous solution for preparing, after for some time, takes out dry; then it is immersed in 980 ℃～1150 ℃ the Ni-based plating bath; and keep steel matrix in plating bath, to move, and take out matrix behind the 10s, under nitrogen protection, carry out naturally cooling.The nickel base alloy carbon steel matrix material of hot dip coating method preparation put into be connected with N
2Retort furnace in, in 950 ℃ temperature range, be incubated 10h, carry out solution treatment, after insulation finished, sample cooled off fast.At last the sample after the solution treatment is put in 750 ℃ the stove, insulation 30h carries out ageing treatment, furnace cooling.
Embodiment 4:
The steel matrix of sandblasting is dipped in the plating assistant agent aqueous solution for preparing, after for some time, takes out dry; then it is immersed in 980 ℃～1150 ℃ the Ni-based plating bath; and keep steel matrix in plating bath, to move, and take out matrix behind the 10s, under nitrogen protection, carry out naturally cooling.The nickel base alloy carbon steel matrix material of hot dip coating method preparation put into be connected with N
2Retort furnace in, in 900 ℃ temperature range, be incubated 7h, carry out solution treatment, after insulation finished, sample cooled off fast.At last the sample after the solution treatment is put in 680 ℃ the stove, insulation 20h carries out ageing treatment, furnace cooling.
Embodiment 5:
The steel matrix of sandblasting is dipped in the plating assistant agent aqueous solution for preparing, after for some time, takes out dry; then it is immersed in 980 ℃～1150 ℃ the Ni-based plating bath; and keep steel matrix in plating bath, to move, and take out matrix behind the 10s, under nitrogen protection, carry out naturally cooling.The nickel base alloy carbon steel matrix material of hot dip coating method preparation put into be connected with N
2Retort furnace in, in 900 ℃ temperature range, be incubated 5h, carry out solution treatment, after insulation finished, sample cooled off fast.At last the sample after the solution treatment is put in 680 ℃ the stove, insulation 16h carries out ageing treatment, furnace cooling.
Embodiment 6:
The steel matrix of sandblasting is dipped in the plating assistant agent aqueous solution for preparing, after for some time, takes out dry; then it is immersed in 980 ℃～1150 ℃ the Ni-based plating bath; and keep steel matrix in plating bath, to move, and take out matrix behind the 10s, under nitrogen protection, carry out naturally cooling.The nickel base alloy carbon steel matrix material of hot dip coating method preparation put into be connected with N
2Retort furnace in, in 900 ℃ temperature range, be incubated 10h, carry out solution treatment, after insulation finished, sample cooled off fast.At last the sample after the solution treatment is put in 680 ℃ the stove, insulation 30h carries out ageing treatment, furnace cooling.
Claims (2)
1, a kind of method of improving hot dipping Ni-based alloy coating property with solid solution aging, it is characterized in that: the steel matrix surface is through sandblast pretreatment, cover one deck plating assistant agent by soaking then, after the moisture and crystal water in the oven dry plating assistant agent, be immersed in the nickel-base alloy plating bath, then matrix is taken out from plating bath, air cooling obtains ni base alloy coating, then in 850 ℃～950 ℃ temperature ranges, soaking time is that 5～10h carries out solution treatment, and insulation is cooled off after finishing fast, at last the sample after the solid solution is placed in 600 ℃～750 ℃ the stove, insulation 16～30h carries out ageing treatment; The composition weight percent of nickel-base alloy is Cr:5～20%, B:1～6%, and Si:1～6%, C:0～1.1%, Fe :≤10%, Ni: surplus.
2, improve the method for hot dipping Ni-based alloy coating property according to claim 1 is described with solid solution aging, it is characterized in that: solid solution aging is treated to insulation 5h in 950 ℃ the temperature range, carries out solution treatment, and after insulation finished, sample cooled off fast; At last the sample after the solution treatment is put in 750 ℃ the stove, insulation 16h carries out ageing treatment, furnace cooling.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101890483A (en) * | 2010-07-23 | 2010-11-24 | 哈尔滨工业大学 | Method for preparing special alloy thin-walled member |
| CN105745337A (en) * | 2013-12-02 | 2016-07-06 | 陶氏环球技术有限责任公司 | Precipitation hardening of tantalum coated metals |
| CN109694948A (en) * | 2019-02-20 | 2019-04-30 | 上海春玉金属热处理有限公司 | A kind of planetary gear shaft nickel plating aging technique |
-
2009
- 2009-07-03 CN CNA2009100881535A patent/CN101597728A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101890483A (en) * | 2010-07-23 | 2010-11-24 | 哈尔滨工业大学 | Method for preparing special alloy thin-walled member |
| CN105745337A (en) * | 2013-12-02 | 2016-07-06 | 陶氏环球技术有限责任公司 | Precipitation hardening of tantalum coated metals |
| US9963757B2 (en) | 2013-12-02 | 2018-05-08 | Dow Global Technologies Llc | Precipitation hardening of tantalum coated metals |
| CN105745337B (en) * | 2013-12-02 | 2018-06-19 | 陶氏环球技术有限责任公司 | The precipitation-hardening of the metal of tantalum coating |
| CN109694948A (en) * | 2019-02-20 | 2019-04-30 | 上海春玉金属热处理有限公司 | A kind of planetary gear shaft nickel plating aging technique |
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Open date: 20091209 |