CN102699495B - Method for preparing TiB2 metal ceramic wear-resistant coating - Google Patents
Method for preparing TiB2 metal ceramic wear-resistant coating Download PDFInfo
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- CN102699495B CN102699495B CN201110446423.2A CN201110446423A CN102699495B CN 102699495 B CN102699495 B CN 102699495B CN 201110446423 A CN201110446423 A CN 201110446423A CN 102699495 B CN102699495 B CN 102699495B
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Abstract
The invention provides a method for preparing a high-tenacity high-wear-resistance TiB2 metal ceramic coating. The method comprises the following steps of: melting a TiB2-containing precursor and a powder cored wire made of a Cr, Ni, Mn and Si alloy by using a tungsten inert gas (TIG) arc; and performing in-situ combination in a molten pool by using TiB2 to form the TiB2 metal ceramic coating on which metal is compactly combined with the TiB2, wherein the TiB2 accounts for 15 to 60 percent of the volume of the obtained coating, and the hardness HB of the coating is 380 to 780.
Description
Technical field
The invention belongs to Surface Engineering and high-abrasive material field, relate to the method that TIG arc melting powder cored filament material prepares TiB2 metal ceramic wear-resisting coating.
Background technology
TiB2 has many excellent properties such as high-melting-point, high rigidity, low-density, resistance to chemical corrosion that wearability is good, high, it is the alternative high-abrasive material of Cr3C2, WC, become the focus material of Research on Surface Modification, be widely used in the fields such as Aero-Space, weaponry, metallurgy, cutter.But the fragility of TiB2 is large, applies restricted.The high strength of TiB2 is combined with the high tenacity of metal/alloy to form TiB2 ceramic-metal composite be solve TiB2 material fragility to obtain one of effective way of high-ductility high abrasion resisting material.
Current TiB2 metal-cermic coating often adopts the technology preparations such as electric arc spraying, HVAF, plasma spraying and plasma transferred arc surface overlaying, laser melting and coating process.But due to the inherent characteristic of hot-spraying technique, its coating is lamellar structure, sheet inter-layer bonding force is low, combination mainly mechanical bond and the physical bond of coating and base material, bond strength is not high, and in spray coating process, TiB2 also easily exists with some unfavorable factors such as the oxygen reaction be involved in by high-speed jet; Although laser cladding coating is metallurgical binding mode, and easily obtain thin brilliant coating microstructure, equipment needed thereby costly; Plasma transferred arc surface overlaying hot-fluid is large, and bath temperature is high, and overlay cladding thermal stress is large, easily forms fire check.
TIG arc is the high density energy, and equipment cost is low, and molten bath cools fast under an argon atmosphere and solidifies, and degree of oxidation is low, easily obtains the solidified structure of thin crystalline substance, and obtains the coating material of strong mechanical performance.TIG arc is widely used in the hard-face overlaying welding of metal material.TIG welding method, at patent 90109398.X, is all documented in 03134043.1,200510081723.X, and the present invention no longer large fierce dog states.The research of ceramic-metal composite shows, 1) ceramic particle is as the hardening constituent of metallic matrix, and its content, granularity, distribution, especially alternate with metallic matrix interfacing relationship affects the mechanical property of ceramic-metal composite.Compared with ceramic particle external-added preparation technology, in adopting, the fabricated in situ technique of raw ceramic particle then can obtain the interface of ceramics particle strengthened cleaning alternate with metallic matrix; 2) high abrasion ceramic-metal composite not only requires that the hardness of hardening constituent is high, matrix phase good toughness, also require that the hardness of matrix phase is reasonably mated with the hardness of hardening constituent, otherwise matrix phase is not wear-resisting, causes hard phase to come off, and reduces wearability.Thus prepare in the technique of TiB2 metal-cermic coating at TIG arc melting powder cored filament material, predecessor Reactive Synthesis TiB2 hard particles in TIG arc molten bath of TiB2, as hardening constituent, by adding chromium, nickel, silicon, the manganese element of certain content in powder core powder filler, be dissolved in the tissue of steel, under the condition of fast cooling of molten bath, form alloy ferritic, alloy pearlite and alloyed cementite, thus the matrix phase of the tissue-TiB2 ceramic-metal composite of strengthening steel; The stirring action that blow force of arc produces molten bath, suppress the TiB2 grain growth of reaction generation and order about it to disperse in molten bath, after the quick cooled and solidified in molten bath, solidified structure is tiny, and TiB2 distribution of particles is more even.
Summary of the invention
The object of this invention is to provide that a kind of cost is low, quality good, the TIG arc melting powder cored filament material of high-ductility high abrasion prepares the method for TiB2 metal ceramic wear-resisting coating.
In order to achieve the above object, the present invention is by the following technical solutions:
A preparation method for TiB2 metal ceramic wear-resisting coating, is characterized in that, comprise the steps:
(1) by micron order titanium-iron powder or spongy titanium powder and ferro-boron powder or amorphous boron powder presses titanium in following equation, boron element mass ratio prepares TiB2 predecessor;
Ti+2B＝TiB2
(2) mixed with the metal dust or its alloy powder containing Cr, Ni, Mn, Si element by the predecessor of the TiB2 of preparation, the mass percentage of Cr, Ni, Mn, Si element is no more than 10%.Mixing is placed in ball grinder, ball milling 2 ~ 3 hours in anhydrous ethanol medium, dries, as the filler of powder cored filament material at 100 DEG C;
(3) select specification be 304 or the 08F steel band of 10mm × 0.3mm as crust, flux-cored wire forming machine is rolled into the powder cored filament material that diameter is 2.8mm ~ 3.0mm, and powder activity coefficient controls 18% ~ 26%;
(4) adopt TIG welding on carbon steel base material, melt prepared powder cored filament material, form TiB2 metal-cermic coating.
The powder size of described TiB2 predecessor is less than 200 orders, and titanium mass percent is not less than titanium-iron powder or the spongy titanium powder of 40%, and boron mass percent is not less than ferro-boron powder or the amorphous boron powder of 20%;
Described metal dust or alloy powder can select granularity to be less than 200 object chromium powders, nickel powder or ferrochrome powder, nichrome powder and ferrosilicon powder or rare earth silicon iron powder and ferromanganese powder, its in the powder filler of powder cored filament material mass percent shared by Cr, Ni, Mn, Si element lower than 10%;
In described TIG welding, TIG arc melting and coating process can adopt automatic, semi-automatic TIG arc welding process or manual TIG arc welding process; TIG arc current is 90A ~ 120A, and powder cored filament material and welding torch angle are 100 ° ~ 130 °, and the angle of welding torch and carbon steel base material is 60 ° ~ 75 °, before powder cored filament material is placed in welding torch moving direction, and welding torch translational speed is 2 ~ 4mm/s.
Obviously, in order to obtain the TiB2 metal-cermic coating of high abrasion, present invention employs following technological measure:
(1) spongy titanium powder and amorphous boron powder to be respectively used to regulate in pre-reaction material Ti, B content and proportion in powder cored filament material powder filler;
(2) add in powder cored filament material powder filler mass percent be less than 10% chromium, nickel, silicon, manganese alloying element, the Metal-coated substrates thing phase prepared by regulation and control;
(3) controlling powder activity coefficient in powder cored filament material preparation process is 18% ~ 26%;
(4) in TIG arc melting and coating process, by regulating arc current, transporting the technological parameters such as the angle of arc speed and powder cored filament material and welding torch angle, welding torch and carbon steel base material, regulate molten bath volume, thus regulate the content of TiB2 proportion and alloying element in cladding coating.
The present invention adopts TIG arc melting to comprise the powder cored filament material of TiB2 predecessor, at steel surface fabricated in situ TiB2 metal-cermic coating.Be 18% ~ 26% by controlling the powder activity coefficient of powder cored filament material, the alloyed powder of chromium, nickel, silicon, manganese adds mass percent and is less than 10% in powder cored filament material powder filler, and control TIG arc melting and coating process parameter, in the TiB2 metal-cermic coating obtained, TiB2 volumn concentration reaches 15% ~ 60%, coating hardness HB380 ~ 780.
Accompanying drawing explanation
Fig. 1 to be TiB2 volumn concentration prepared by the present invention be 35.6% TiB2 metal-cermic coating micro-organization chart;
Fig. 2 to be TiB2 volumn concentration prepared by the present invention be 52.4% TiB2 metal-cermic coating micro-organization chart;
In figure, wherein black particle is expressed as TiB2.
Detailed description of the invention
Embodiment 1:
(1) getting granularity is respectively 300 order ~ 200 orders, be the titanium-iron powder of 40wt.% containing Ti, granularity is 300 order ~ 200 orders is the ferro-boron powder of 20wt.% containing B, and particle mean size is the amorphous boron powder of 2 μm, be about 5: 5: 1 by mass percentage to prepare burden, total amount is 200g; Again by the chromium powder, the nickel powder of 3g, 55 ferromanganese of 15g, 75 ferrosilicon of 12g that add 6g.Be placed in ball grinder, absolute ethyl alcohol, as ball-milling medium, with the rotating speed ball milling 2 hours of 300r/min, after air-dry, is placed in the oven dry of 80 DEG C, heating furnace, as the powder filler of powder cored filament material;
(2) rolling powder cored filament material on flux-cored wire forming machine.Get 304 steel bands that specification is 10mm × 0.3mm, it is 20% that adjustment adds powder coefficient, and drawing tube reducing is to 2.8mm;
(3) TiB2 metal-cermic coating is prepared in manual TIG arc-welding.Specification be 200mm × 100mm × 10mm 45 carbon steels through sand papering, watery hydrochloric acid cleaning after as base material, adjustment powder cored filament material and welding torch angle are 100 °, the angle of welding torch and base material is 60 °, welding torch translational speed be 3mm/s, TIG arc current is 100A, voltage 12V, argon flow amount 20l/min, and adjacent welding bead overlaps 1/4.
Above-mentioned prepared TiB2 metal-cermic coating, the volumn concentration analyzing TiB2 particle through Image image software is 34.7%, is HB460, by GB 12444.2-1990 by Brinell hardness instrument tested for hardness, adopt ring block friction-wear test, its wearability is higher than chromium series low-alloy abrasion-resistant stee.
Embodiment 2:
(1) getting granularity is respectively 300 order ~ 200 object spongy titanium powders, and granularity is 300 order ~ 200 orders is the ferro-boron powder of 20wt.% containing B, and particle mean size is the amorphous boron powder of 2 μm, is about 5: 8: 1 by mass percentage and prepares burden, and total amount is 200g; Again by the chromium powder, the nickel powder of 5g, 55 ferromanganese of 10g, 75 ferrosilicon of 12g that add 6g.Be placed in ball grinder, absolute ethyl alcohol, as ball-milling medium, with the rotating speed ball milling 2 hours of 300r/min, after air-dry, is placed in the oven dry of 80 DEG C, heating furnace, as the powder filler of powder cored filament material;
(2) rolling powder cored filament material on flux-cored wire forming machine.Get 304 steel bands that specification is 10mm × 0.3mm, it is 25% that adjustment adds powder coefficient, and drawing tube reducing is to 3mm;
(3) TiB2 metal-cermic coating is prepared in semi-automatic TIG arc-welding.Specification be 200mm × 100mm × 10mm 45 carbon steels through sand papering, watery hydrochloric acid cleaning after as base material, adjustment powder cored filament material and welding torch angle are 120 °, the angle of welding torch and base material is 72 °, welding torch translational speed be 3mm/s, TIG arc current is 120A, voltage 12V, argon flow amount 20l/min, and adjacent welding bead overlaps 1/4.
Above-mentioned prepared TiB2 metal-cermic coating, the volumn concentration analyzing TiB2 particle through Image image software is 52.5%, is HB710, by GB 12444.2-1990 by Brinell hardness instrument tested for hardness, adopt ring block friction-wear test, its wearability is higher than martensite wear resistant steel.
The present invention adopts TIG arc melting to comprise the predecessor of TiB2 and the powder cored filament material of Cr, Ni, Mn, Si alloy, utilizes TiB2 in the synthesis of molten bath situ, forms metal and be combined fine and close TiB2 metal-cermic coating with TiB2.In the coating obtained, TiB2 volumn concentration reaches 15% ~ 60%, coating hardness HB380 ~ 780.
Above-described embodiment is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Every belong to technical scheme of the present invention the apparent change of extending out or variation be still in the row of protection scope of the present invention.
Claims (2)
1. a preparation method for TiB2 metal ceramic wear-resisting coating, is characterized in that, comprises the steps:
(1) by micron order titanium-iron powder or spongy titanium powder and ferro-boron powder or amorphous boron powder presses titanium in following equation, boron element mass ratio prepares TiB2 predecessor;
Ti+2B＝TiB2
(2) predecessor of the TiB2 of preparation is mixed with the metal dust or its alloy powder containing Cr, Ni, Mn, Si element, mixing is placed in ball grinder, ball milling 2 ~ 3 hours in anhydrous ethanol medium, dries, as the filler of powder cored filament material at 100 DEG C;
(3) select specification be 304 or the 08F steel band of 10mm × 0.3mm as crust, flux-cored wire forming machine is rolled into the powder cored filament material that diameter is 2.8mm ~ 3.0mm, and powder activity coefficient controls 18% ~ 26%;
(4) adopt TIG welding on carbon steel base material, melt prepared powder cored filament material, form TiB2 metal-cermic coating;
Wherein, the powder size of TiB2 predecessor is less than 200 orders, and titanium mass percent is not less than titanium-iron powder or the spongy titanium powder of 40%, and boron mass percent is not less than ferro-boron powder or the amorphous boron powder of 20%;
In the powder filler of powder cored filament material, shared by described Cr, Ni, Mn, Si element, mass percentage is no more than 10%; Describedly be less than 200 orders containing the metal dust of Cr, Ni, Mn, Si element or the granularity of its alloy powder.
2. the preparation method of a kind of TiB2 metal ceramic wear-resisting coating according to claim 1, it is characterized in that: in TIG welding, TIG arc melting and coating process can adopt automatic, semi-automatic TIG arc welding process or manual TIG arc welding process; TIG arc-welding electric current is 90A ~ 120A, and powder cored filament material and welding torch angle are 100 ° ~ 130 °, and the angle of welding torch and carbon steel base material is 60 ° ~ 75 °, before powder cored filament material is placed in welding torch moving direction, and welding torch translational speed is 2 ~ 4mm/s.
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| US9475154B2 (en) | 2013-05-30 | 2016-10-25 | Lincoln Global, Inc. | High boron hardfacing electrode |
| CN103305829A (en) * | 2013-06-18 | 2013-09-18 | 江苏和昊激光科技有限公司 | Special nickel-based cermet alloy powder for laser cladding of surface of screw |
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| US5837326A (en) * | 1996-04-10 | 1998-11-17 | National Research Council Of Canada | Thermally sprayed titanium diboride composite coatings |
| CN101223294A (en) * | 2005-01-31 | 2008-07-16 | 材料及电化学研究公司 | Method for the manufacture of titanium alloy structure |
| CN101403054A (en) * | 2008-11-13 | 2009-04-08 | 四川大学 | Method for generating TiB2/Fe based composite material with reaction in-situ |
| CN101602132A (en) * | 2009-07-15 | 2009-12-16 | 华北电力大学 | The preparation method who is used for the powder-cored welding wire and the cladding layer of surface of hot working die cladding |
| CN101837520A (en) * | 2010-04-07 | 2010-09-22 | 华北电力大学 | Anti-wear powder-cored wire for wear plate and cutting ring and preparation method thereof |
| RU2446930C1 (en) * | 2010-12-15 | 2012-04-10 | Государственное образовательное учреждение высшего профессионального образования Волгоградский государственный технический университет (ВолгГТУ) | Flux-cored wire |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5837326A (en) * | 1996-04-10 | 1998-11-17 | National Research Council Of Canada | Thermally sprayed titanium diboride composite coatings |
| CN101223294A (en) * | 2005-01-31 | 2008-07-16 | 材料及电化学研究公司 | Method for the manufacture of titanium alloy structure |
| CN101403054A (en) * | 2008-11-13 | 2009-04-08 | 四川大学 | Method for generating TiB2/Fe based composite material with reaction in-situ |
| CN101602132A (en) * | 2009-07-15 | 2009-12-16 | 华北电力大学 | The preparation method who is used for the powder-cored welding wire and the cladding layer of surface of hot working die cladding |
| CN101837520A (en) * | 2010-04-07 | 2010-09-22 | 华北电力大学 | Anti-wear powder-cored wire for wear plate and cutting ring and preparation method thereof |
| RU2446930C1 (en) * | 2010-12-15 | 2012-04-10 | Государственное образовательное учреждение высшего профессионального образования Волгоградский государственный технический университет (ВолгГТУ) | Flux-cored wire |
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