CN1804081A - Fused zinc corrosion resistant intermetallic compound Ti-Al-Nb alloy - Google Patents
Fused zinc corrosion resistant intermetallic compound Ti-Al-Nb alloy Download PDFInfo
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- CN1804081A CN1804081A CN 200610011237 CN200610011237A CN1804081A CN 1804081 A CN1804081 A CN 1804081A CN 200610011237 CN200610011237 CN 200610011237 CN 200610011237 A CN200610011237 A CN 200610011237A CN 1804081 A CN1804081 A CN 1804081A
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Abstract
The invention provides an intermetallic compound-Ti-Al-Nb alloy comprising the following constituents: Al 40-60%, Nb 5-20%, W 0.1-2%, B 0.05-2%, Y 0.05-2%, and balancing Ti, the ratio is calculated by atom percent.
Description
Technical field
The invention belongs to the intermetallic compound technical field, a kind of intermetallic compound-Ti-Al-Nb alloy of resisting corrosion of molten zinc particularly is provided.Relate to a kind of novel high-niobium TiAl-base alloy with good resisting corrosion of molten zinc performance.The various component that are used for galvanizing zinc pot, as the sinking rod, stablize rod, guide roller, stove nose and bearing etc.
Background technology
The zinc of molten state has low viscosity and low surface tension, and it can easily be penetrated in the minim gap with micron-scale.It to most metals all have intensive corrodibility (1] R.W.Richards, R.D.Jones, P.D.Clements, and H.Clarke, Metallurgy of Continuous Hot-Dip Aluminizing, The Institute ofMaterials and ASM International, 1994:191-212.; Office of industrial technologiesenergy efficiency and renewable energy U.S.Department Of Energy January 2002:1-2.; Galvanizing for Corrosion Protection A Pacifier ' s Guide AMERICANGALVANIZERS ASSOCIATION.2000.4-10).The average fortnight M.S.Brunnock of the maintenance cycle of general steel band continuous hot galvanizing line, R.D.Jones, G.A.Jenkins, D.T.Llewellyn, " Investigation of theInteractions Between Liquid Zinc and Stainless Steels for Use in Continuous GalvanizingHardware; " Zinc-Based Steel Coating Systems:Production and Performance, ed.F.E.Goodwin, The Minerals, Metals ﹠amp; Materials Society, 1998:51-62.).This is to produce corrosion owing to fused zinc in the galvanizing kettle makes rolling member wherein, air spots, and the product (Fe-Zn series intermetallic compound) of corrosion formation is deposited in the fused zinc on the other hand, also can destroy the surface of coating.The loss that this regular and irregular stopping production maintenance causes is very serious.If can suppress the formation that the product of corrosion formation takes place and reduces corrosive, will reduce the off-time, improve quality of coating, reduce cost, the save energy of maintenance and renewal part and improve environment (A.R.B.Verma, W.J.van Ooij " 560 ℃ of High-temperature batch hot-dipgalvanizing.Part 1.General description of coatings formed at; " Surface andCoatings Technology 1997,89:132-142.; Galvanizing for Corrosion Protection:ASpecifier ' s Guide, American Galvanizers Association, 2000; Hot-Dip Galvanizing forCorrosion Protection of Steel Products, American Galvanizers Association, 2000; ZincCoatings:Microstructures of Various Zinc Coatings, AMERICAN ALVANIZERSASSOCIATION, 2000.).
In the hot dip process at present, the material of sinking rod is a stainless steel HVOF spraying WC-12Co powder.Nagoya factory of Nippon Steel Corporation has developed the boride composite powder now again.HVOF spraying WC-17Co+ boride (WB, MoB2) composite powder.WC is an abrasion-resistant powder, and Co (5%-15%) increases coating's adhesion and compactness, and Cr and Co form solid appearance body.Boride has erosion resistance to liquid zinc.But actual service life super only 20 days (The Design ofProducts to be Hot-Dip Galvanized After Fabrication, AMERICAN ALVANIZERSASSOCIATION, 2000).Have the existing report of element of ceramic coating, this coating comprises the metal alloy or the mixture of carbide or boride.Has the heat spray ceramic coating element that the WC-Co composition constitutes, have the heat spray ceramic coating element that constitutes by metal and metal boride or metallic carbide, and element (the Japanese Patent JP 2001271151 with the hot melt coating that constitutes by cobalt and boride or carbide; Japanese Patent JP2000144358).In these coatings, be good basically corrosion-resistant coating such as metal ingredient, boride and the carbide of cobalt, but they can not be worked in melt zinc effectively.The resisting corrosion of molten zinc alloy of development such as J.C Wood.It is a kind of alloy of forming by boron and the surplus molybdenum of 3-9wt%, adopt MoB to apply by blast and gas flame spraying technology in weak oxide atmosphere as raw material powder, perhaps adopting provides the Mo-B alloy to apply (Chinese invention patent CN 1083122A.) as raw material powder by plasma spraying technology.The internal heater with performance of resisting corrosion of molten zinc of development such as Cao Xiaoming.Be through the rare earth modified Fe-B-Mo-W iron-based zinc of anti-liquid corrosion material.The technology that is adopted is the method for oozing altogether by solid boron-rare earth element, and the boron atom is infiltrated the plain carbon stool surface; Perhaps adopt powder metallurgic method, sintering behind die mould on the plain carbon stool pipe (Chinese invention patent CN 1200894A).
In sum, the work that investigators carried out mainly is to adopt thermospray or other technology that body material is carried out surface treatment.The shortcoming of these methods is that complex process, raw materials cost height, cycle are long, and is difficult to guarantee the quality of coating.Coating is in a single day destroyed, and liquid zinc just corrodes matrix rapidly, and its destruction is unexpected.And for the research of high-niobium TiAl-base alloy liquid zinc corrosion resistant, report not also both at home and abroad at present.
Summary of the invention
The object of the present invention is to provide a kind of intermetallic compound-Ti-Al-Nb alloy of resisting corrosion of molten zinc, this alloy has good anti-corrosion and wear resistance, can be impregnated in the melt zinc or contact with it, to prevent of the corrosion of zinc liquid to each parts in the zinc pot, prolong their work-ing life, enhance productivity save energy.
Composition range of the present invention is: Al:40～60%,, Nb:5～20%, W:0.1-2%, B:0.05-2%, Y:0.05-2%, surplus is Ti; Be atomic percent.
In test, the high-niobium TiAl-base alloy sheet sample after the line cutting after ultrasonic cleaning, does not pass through other any processing, shows superpower erosion resistance in zinc liquid (containing about 0.2% weight percent of aluminium, 450 ℃).
The corrosion of high-niobium TiAl-base alloy in zinc liquid is divided into two stages: the fs is incubation period, about 65-70 days, does not corrode in incubation period; Subordinate phase is the corrosion phase, and corrosion takes place rapidly, the about 0.3mm/ of corrosion speed days.
(4) after corrosion began to take place, zinc liquid showed as dissolved corrosion mechanism to the corrosion of high-niobium TiAl-base alloy.
The invention effect
(1) high-niobium TiAl-base alloy shows superpower erosion resistance in zinc liquid.
(2) high-niobium TiAl-base alloy is divided into two stages in the corrosion of zinc liquid: the fs required time is long, does not corrode; The subordinate phase corrosion sharply takes place, and elapsed-time standards is short.
(3) in test,, and also have a lot of holes, do not influence its erosion resistance although the tissue of the high-niobium TiAl-base alloy of as cast condition, composition are all inhomogeneous.
Description of drawings
Fig. 1 is a static corrosion equipment synoptic diagram of the present invention.Wherein, tabular sample 1, well heater 2, furnace wall 3, zinc liquid 4, crucible 5.
Fig. 2 is an as-cast high-Nb titanium aluminum alloy tissue topography.
Fig. 3 is not for corroding high-niobium TiAl-base alloy specimen surface pattern.
Fig. 4 is 60 days high-niobium TiAl-base alloy specimen surface patterns of corrosion.
Fig. 5 is 65 days high-niobium TiAl-base alloy specimen surface patterns of corrosion.
Fig. 6 is 68 days high-niobium TiAl-base alloy specimen surface patterns of corrosion.
Fig. 7 is that the high-niobium TiAl-base alloy sample soaks the cross-sectional picture after 60 days in zinc liquid.
Fig. 8 is high-niobium TiAl-base alloy and 316 stainless thickness loss value and time relation.
Embodiment
Embodiment 1:
The nominal composition of testing used alloy is Ti-45Al-8Nb-0.1W-0.1B-0.1Y) (atomic percent), ingot casting forms by the vacuum consumable skull melting.In the experiment, the erosion resistance of this alloy and 316 stainless steels compare.The high-Nb Ti-Al size of sample of 316 stainless steel samples and as cast condition is 50 * 20 * 2mm
3, with ultrasonic wave sample is cleaned up before the test.Zinc ingot metal (about 0.2% weight percent of aluminium content) is put into the crucible heating make it fusing, and be heated to 450 ℃ of insulations.Then sample is inserted in the zinc liquid, under 450 ℃, do static corrosion-resistant life test.Observe the variation of different experiments specimen surface in period pattern, and measure its thickness loss.Fig. 1 is a static corrosion equipment synoptic diagram.Fig. 2 is the northern scattering photo of the tissue of the high Nb-TiAl of as cast condition.As can be seen from the figure the high Nb-TiAl of as cast condition is by α
2/ γ synusia is rolled into a ball the bifurcation tissue of forming, and also has the β phase of a spot of white.
Compare with 316 stainless steels, show superpower erosion resistance in the high-niobium TiAl-base alloy liquid, Fig. 3 (a) is the original sample of high-niobium TiAl-base alloy sheet, from figure, can see significantly, specimen surface can be seen specimen surface because line cuts the vestige of left strip significantly not through handling polishing from figure.Fig. 3 (b) is the sample that soaks in zinc liquid after 60 days, and high-niobium TiAl-base alloy and zinc liquid are not moistening fully as can be seen, and without any corrosion, it is high-visible that line cuts left strip vestige to sample for zinc liquid, and cooled zinc is very easy to be peeled off.Fig. 3 (c) is that etching time is 65 days a sample, and the corrosion situation is with (b) basic identical.Fig. 3 (d) is that etching time is 68 days a sample, and zinc has been difficult to separate with sample, and this explanation corrosion has begun.Fig. 7 is that the high-niobium TiAl-base alloy sample soaks cross-sectional picture after 60 days in zinc liquid.Zinc liquid and high-niobium TiAl-base alloy specimen surface are nonwetting fully as can be seen, do not corrode.
Fig. 8 is the thickness loss value and the time relation curve of high-niobium TiAl-base alloy and 316 stainless steel samples.At preceding 65 days, the thickness of high-niobium TiAl-base alloy did not change, but corrosion and aggravation rapidly took place in back 4 days, and high-niobium TiAl-base alloy is corroded rapidly.Though the corrosion speed of 316 stainless steels in zinc liquid is very slow, the iron in the stainless steel easily and zinc form dystectic compound, stick to and be difficult on the stainless steel come off, finally cause stainless steel sample and zinc liquid clog.Experiment can't be proceeded, and the problem in the production is also like this.
Embodiment 2:
The nominal composition of testing used alloy is Ti-50Al-17Nb-0.5W-1B-1Y) (atomic percent), ingot casting forms by the vacuum consumable skull melting.In the experiment, the erosion resistance of this alloy and 316 stainless steels compare.The high-Nb Ti-Al size of sample of 316 stainless steel samples and as cast condition is 50 * 20 * 2mm
3, with ultrasonic wave sample is cleaned up before the test.Zinc ingot metal (about 0.2% weight percent of aluminium content) is put into the crucible heating make it fusing, and be heated to 450 ℃ of insulations.Then sample is inserted in the zinc liquid, under 450 ℃, do static corrosion-resistant life test.Observe the variation of different experiments specimen surface in period pattern, and measure its thickness loss.
Experimental result shows that zinc liquid shows superpower erosion resistance in (containing about 0.2% weight percent of aluminium, 450 ℃).The corrosion of the high-niobium TiAl-base alloy of this composition in zinc liquid is divided into two stages: the fs is incubation period, about 70-80 days, does not corrode in incubation period; Subordinate phase is the corrosion phase, and corrosion takes place rapidly, the about 0.2mm/ of corrosion speed days.
Embodiment 3:
The nominal composition of testing used alloy is Ti-55Al-13Nb-2W-1.5B-2Y) (atomic percent), ingot casting forms by the vacuum consumable skull melting.In the experiment, the erosion resistance of this alloy and 316 stainless steels compare.The high-Nb Ti-Al size of sample of 316 stainless steel samples and as cast condition is 50 * 20 * 2mm
3, with ultrasonic wave sample is cleaned up before the test.Zinc ingot metal (about 0.2% weight percent of aluminium content) is put into the crucible heating make it fusing, and be heated to 450 ℃ of insulations.Then sample is inserted in the zinc liquid, under 450 ℃, do static corrosion-resistant life test.Observe the variation of different experiments specimen surface in period pattern, and measure its thickness loss.
Experimental result shows that zinc liquid shows superpower erosion resistance in (containing about 0.2% weight percent of aluminium, 450 ℃).The corrosion of the high-niobium TiAl-base alloy of this composition in zinc liquid is divided into two stages: the fs is incubation period, about 75 days, does not corrode in incubation period; Subordinate phase is the corrosion phase, and corrosion takes place rapidly, the about 0.2mm/ of corrosion speed days.
Claims (1)
1, a kind of intermetallic compound of resisting corrosion of molten zinc-Ti-Al-Nb alloy, it is characterized in that: composition range is: Al:40～60%,, Nb:5～20%, W:0.1-2%, B:0.05-2%, Y:0.05-2%, surplus is Ti, is atomic percent.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101748354B (en) * | 2008-12-16 | 2011-08-31 | 上海宝钢设备检修有限公司 | Spray method of composite coating resisting corrosive wear of zinc solution |
| CN102212766A (en) * | 2011-05-24 | 2011-10-12 | 哈尔滨工业大学 | Hot machining method for thinning Ti2AlNb-based alloy grains |
| CN102352504A (en) * | 2011-10-10 | 2012-02-15 | 北京科技大学 | Pretreatment method for improving TiAl-Nb alloy liquid zinc corrosion resistance performance |
| CN102418064A (en) * | 2011-12-09 | 2012-04-18 | 北京科技大学 | Method for preparing TiAl-Nb composite coating with liquid zinc corrosion resistance through supersonic spray ing |
| CN102925892A (en) * | 2012-11-23 | 2013-02-13 | 北京科技大学 | Electric spark deposition method for molten zinc corrosion resistant Ti-Al-Nb coating |
| CN105970026A (en) * | 2016-05-31 | 2016-09-28 | 黄河科技学院 | Light weight alloy material and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1142305C (en) * | 2001-11-08 | 2004-03-17 | 北京科技大学 | High temperature high performance high-niobium titanium-aluminium alloy |
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2006
- 2006-01-19 CN CNB2006100112375A patent/CN100363519C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101748354B (en) * | 2008-12-16 | 2011-08-31 | 上海宝钢设备检修有限公司 | Spray method of composite coating resisting corrosive wear of zinc solution |
| CN102212766A (en) * | 2011-05-24 | 2011-10-12 | 哈尔滨工业大学 | Hot machining method for thinning Ti2AlNb-based alloy grains |
| CN102212766B (en) * | 2011-05-24 | 2012-10-03 | 哈尔滨工业大学 | Hot machining method for thinning Ti2AlNb-based alloy grains |
| CN102352504A (en) * | 2011-10-10 | 2012-02-15 | 北京科技大学 | Pretreatment method for improving TiAl-Nb alloy liquid zinc corrosion resistance performance |
| CN102352504B (en) * | 2011-10-10 | 2013-05-22 | 北京科技大学 | Pretreatment method for improving TiAl-Nb alloy liquid zinc corrosion resistance performance |
| CN102418064A (en) * | 2011-12-09 | 2012-04-18 | 北京科技大学 | Method for preparing TiAl-Nb composite coating with liquid zinc corrosion resistance through supersonic spray ing |
| CN102418064B (en) * | 2011-12-09 | 2013-07-17 | 北京科技大学 | Method for preparing TiAl-Nb composite coating with liquid zinc corrosion resistance through supersonic spraying |
| CN102925892A (en) * | 2012-11-23 | 2013-02-13 | 北京科技大学 | Electric spark deposition method for molten zinc corrosion resistant Ti-Al-Nb coating |
| CN102925892B (en) * | 2012-11-23 | 2014-07-23 | 北京科技大学 | Electric spark deposition method for molten zinc corrosion resistant Ti-Al-Nb coating |
| CN105970026A (en) * | 2016-05-31 | 2016-09-28 | 黄河科技学院 | Light weight alloy material and preparation method thereof |
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Granted publication date: 20080123 Termination date: 20120119 |