CN102230175A - Surface strengthening method of metal material - Google Patents
Surface strengthening method of metal material Download PDFInfo
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- CN102230175A CN102230175A CN 201110191708 CN201110191708A CN102230175A CN 102230175 A CN102230175 A CN 102230175A CN 201110191708 CN201110191708 CN 201110191708 CN 201110191708 A CN201110191708 A CN 201110191708A CN 102230175 A CN102230175 A CN 102230175A
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Abstract
The invention discloses a surface strengthening method of a metal material. The surface strengthening method comprises the following steps: firstly mixing metallic element powder with nonmetallic element powder; adding an adhesive to the obtained mixture, and evenly stirring until the mixture is pasty; uniformly coating the pasty mixture on the surface of the metal material to be strengthened so as to form coatings; scanning the coatings formed on the surface of the metal material line by line by utilizing a spot-shaped heat source under the protection of an argon atmosphere; and finally cooling under the protection of the argon atmosphere to obtain the metal material with the strengthened surface. In the invention, the coatings are scanned line by line by utilizing the spot-shaped heat source so as to induce exothermic combination reaction among the element powder in the coatings so that external heat and heat released from the coatings are highly concentrated in a small area and the coatings are fully molten and react, and the cooled melt forms a compact coating which is well bonded with an alloy substrate. By utilizing the surface strengthening method, surface strength, surface hardness, wear resistance, oxidation resistance and corrosion resistance of the metal material can be improved.
Description
Technical field
The invention belongs to the metal material surface processing technology field, be specifically related to a kind of metal material surface enhancement method.
Background technology
Along with the development of society, constantly to the expansion of ultrahigh-temperature field, the use temperature of material improves constantly activity of human beings.Yet all there are the various problems that are difficult to overcome in the hyperthermal material that is using at present, and causes it to be difficult to processing as the low temperature brittleness of tungsten; Various ultrahigh-temperature potteries have the complicacy of intrinsic fragility and preparation; Carbon-carbon composite then oxidation-resistance is too poor, also can't satisfy the requirement of harsh extreme thermal environment fully.Many good design philosophys can't realize that because of material can't meet the demands therefore, material has just become restriction and hindered the bottleneck that ultrahigh-temperature is used.
In order to improve the use temperature of current material, people want to have use up various ways.Adopt heterogeneous composite ceramics and in pottery, added high strength fibre, overcome the fragility of stupalith; Prevent oxidation in the various coatings of carbon-carbon composite surface preparation, a kind of method wherein adopts refractory carbide in carbon-carbon composite surface preparation oxidation resistant coating exactly, particularly use TaC to mix in the carbon-carbon composite matrix as the principal constituent raw material, or use tantalum compound precursor sintering reaction to generate the TaC thin layer on the surface, but effect is all undesirable, the most thinner thickness of top coat or the resistance to elevated temperatures of preparation are lower or have porousness, thereby cause that strength of coating is low, high thermal resistance difference or premature failure.
Summary of the invention
Technical problem to be solved by this invention is at above-mentioned the deficiencies in the prior art, and the metal material surface that a kind of method is simple, equipment is common, be easy to realize enhancement method is provided.Adopt method of the present invention can improve surface strength, hardness and wear-resistant, anti-oxidant, the corrosion resistance of metallic substance, little to the performance change of material monolithic.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of metal material surface enhancement method, it is characterized in that, this method is: at first elemental metalpowder and non-metallic element powder are mixed by 2: 1～4 atomic ratio, adding caking agent then and stir in mixture makes mixture in the pasty state, then pasty mixture evenly is coated on metal material surface to be strengthened and forms coating, under argon gas atmosphere is protected, adopt the point-like thermal source that the coating that metal material surface forms is lined by line scan again, under the argon gas atmosphere protection, cool off the metallic substance that obtains surface strengthening at last; Described metallic element is a yttrium, and described non-metallic element is one or more among C, B and the Si.
Above-mentioned a kind of metal material surface enhancement method, described yttrium is one or more among Ta, Hf and the Zr.
Above-mentioned a kind of metal material surface enhancement method, described caking agent are water glass, starch caking agent or aqueous sucrose solution.
Above-mentioned a kind of metal material surface enhancement method, the thickness of described coating is 0.1mm～2mm.
Above-mentioned a kind of metal material surface enhancement method, described point-like thermal source is produced by argon-arc welding gun.
Above-mentioned a kind of metal material surface enhancement method, the working current of described argon-arc welding gun is 50A～200A.
Above-mentioned a kind of metal material surface enhancement method, control point-like thermal source is 1mm/s～10mm/s with the relative moving speed of metallic substance to be strengthened in the described process of lining by line scan, scanning line spacing is 1mm～5mm.
The present invention compared with prior art has the following advantages:
1, the inventive method is simple, equipment is common, be easy to realization.
2, the present invention applies one deck coating at substrate surface earlier, adopt then be widely used, argon-arc welding gun (also point-like thermals source such as available electron bundle, laser) with low cost lines by line scan to coat, bring out the heat release combination reaction between element powders in the coating, the heat release that adds heat and coat is concentrated in the zonule, the heat high concentration, coat melts fully, and can fully react, and has just formed after the melt cooling and has combined good dense coating with base material.The present invention has utilized the heat of combination of coating system itself, but save energy reduces plant capacity.
3, employing method of the present invention can improve surface strength, hardness and wear-resistant, anti-oxidant, the corrosion resistance of metallic substance, and is little to the performance change of material monolithic.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 is the micro-structure diagram of the TaW10 alloy material of the embodiment of the invention 1 after surface strengthening.
Embodiment
Embodiment 1
The reinforcement on TaW10 alloy material surface
At first elemental metalpowder Ta is mixed by 1: 1 atomic ratio with non-metallic element powder C; adding caking agent (water glass) then and stir in mixture makes mixture in the pasty state; then pasty mixture evenly being coated on formation thickness in TaW10 alloy material surface to be strengthened is the coating of 0.5mm; the point-like thermal source that adopts argon-arc welding gun to produce under the argon gas atmosphere protection is lined by line scan to the coating that TaW10 alloy material surface forms again; the working current of argon-arc welding gun is 50A; the relative moving speed of control point-like thermal source and TaW10 alloy material is 1mm/s in the process of lining by line scan; scanning line spacing is 3mm, cools off the TaW10 alloy material that obtains surface strengthening at last under the argon gas atmosphere protection.
Fig. 1 is the micro-structure diagram of the TaW10 alloy material of present embodiment after surface strengthening.As can be seen from the figure, TaW10 alloy material surface after surface strengthening has one deck TaC overlay, have one to have component gradient and the transition layer of organizing gradient, no tangible straight interface between overlay, transition layer and alloy base material between overlay and the alloy base material.
Present embodiment adds point-like thermal source and Ta outside; between the C powder under the acting in conjunction of heat release combination reaction; coating generates the Ta-C melt on alloy base material; after under argon shield, cooling off; what the alloy base material surface obtained one deck densification is the overlay of principal phase with TaC; have one to have component gradient and the transition layer of organizing gradient between overlay and the alloy base material; the thickness of overlay is greater than 500 μ m; average hardness HV670; be 3 times of alloy base material; the about 100 μ m of transition region thickness; hardness between overlay and alloy base material, overlay; no tangible straight interface between transition layer and alloy base material.
Embodiment 2
The reinforcement on TaW10 alloy material surface
The enhancement method of present embodiment is identical with embodiment 1, and wherein difference is: elemental metalpowder is Hf or Zr, perhaps is at least two kinds among Ta, Hf and the Zr; The non-metallic element powder is B or Si, perhaps is at least two kinds among C, B and the Si.
Present embodiment adds under the acting in conjunction of heat release combination reaction between point-like thermal source and elemental metalpowder and non-metallic element powder outside; coating generates melt on alloy base material; after under argon shield, cooling off; the alloy base material surface obtains the overlay of one deck densification; have one to have component gradient and the transition layer of organizing gradient, no tangible straight interface between overlay, transition layer and alloy base material between overlay and the alloy base material.
Embodiment 3
The reinforcement on TaW10 alloy material surface
At first elemental metalpowder (Ta and Hf) is mixed with the atomic ratio of non-metallic element powder (C) by 2: 1; adding caking agent (starch caking agent) then and stir in mixture makes mixture in the pasty state; then pasty mixture evenly being coated on formation thickness in TaW10 alloy material surface to be strengthened is the coating of 0.5mm; the point-like thermal source that adopts argon-arc welding gun to produce under the argon gas atmosphere protection is lined by line scan to the coating that TaW10 alloy material surface forms again; the working current of argon-arc welding gun is 100A; the relative moving speed of control point-like thermal source and TaW10 alloy material is 5mm/s in the process of lining by line scan; scanning line spacing is 3mm, cools off the TaW10 alloy material that obtains surface strengthening at last under the argon gas atmosphere protection.
Present embodiment adds under the acting in conjunction of heat release combination reaction between point-like thermal source and Ta, Hf, C powder outside; coating generates the Ta-Hf-C melt on alloy base material; after under argon shield, cooling off; what the alloy base material surface obtained one deck densification is the overlay of principal phase with Ta-Hf sosoloid and TaC; Hf as an alternative the solid solution of formula solid solution element in Ta and TaC mutually in; have one to have component gradient and the transition layer of organizing gradient between overlay and the alloy base material; the thickness of overlay is greater than 500 μ m, no tangible straight interface between overlay, transition layer and alloy base material.
Embodiment 4
The reinforcement on TaW10 alloy material surface
The enhancement method of present embodiment is identical with embodiment 3, and wherein difference is: elemental metalpowder is a kind of among Ta, Hf and the Zr or three kinds, perhaps is Ta and Zr, perhaps is Hf and Zr; The non-metallic element powder is B or Si, perhaps is at least two kinds among C, B and the Si.
Present embodiment adds under the acting in conjunction of heat release combination reaction between point-like thermal source and elemental metalpowder and non-metallic element powder outside; coating generates melt on alloy base material; after under argon shield, cooling off; the alloy base material surface obtains the overlay of one deck densification; have one to have component gradient and the transition layer of organizing gradient, no tangible straight interface between overlay, transition layer and alloy base material between overlay and the alloy base material.
Embodiment 5
The reinforcement on TaW10 alloy material surface
At first with elemental metalpowder (Ta; Hf and Zr) mix by 1: 2 atomic ratio with non-metallic element powder (C and B); adding caking agent (water glass) then and stir in mixture makes mixture in the pasty state; then pasty mixture evenly being coated on formation thickness in TaW10 alloy material surface to be strengthened is the coating of 0.1mm; the point-like thermal source that adopts argon-arc welding gun to produce under the argon gas atmosphere protection is lined by line scan to the coating that TaW10 alloy material surface forms again; the working current of argon-arc welding gun is 150A; the relative moving speed of control point-like thermal source and TaW10 alloy material is 10mm/s in the process of lining by line scan; scanning line spacing is 1mm, cools off the TaW10 alloy material that obtains surface strengthening at last under the argon gas atmosphere protection.
Present embodiment adds point-like thermal source and Ta outside; Hf; Zr; between the C powder under the acting in conjunction of heat release combination reaction; coating generates the Ta-Hf-Zr-C-B melt on alloy base material; after under argon shield, cooling off; the alloy base material surface obtains the overlay of one deck densification; phase composite in the overlay is a principal phase with TaC type carbide and ZrB2 type boride; two types infusible compound uniform mixing; two types phase constitution yardstick is mostly less than 10 μ m; visible sharp interface between overlay and the alloy base material; but be rough spination interface; flawless on the interface, no hole is in conjunction with firm.The thickness of overlay is greater than 200 μ m, and hardness reaches as high as HV970, is 4 times of alloy base material.
Embodiment 6
The reinforcement on TaW10 alloy material surface
The enhancement method of present embodiment is identical with embodiment 5, and wherein difference is: elemental metalpowder is one or both among Ta, Hf and the Zr; The non-metallic element powder is a kind of among C, B and the Si or three kinds, perhaps is C and Si, perhaps is B and Si.
Present embodiment adds under the acting in conjunction of heat release combination reaction between point-like thermal source and elemental metalpowder and non-metallic element powder outside; coating generates melt on alloy base material; after under argon shield, cooling off; the alloy base material surface obtains the overlay of one deck densification; have one to have component gradient and the transition layer of organizing gradient, no tangible straight interface between overlay, transition layer and alloy base material between overlay and the alloy base material.
Embodiment 7
The reinforcement of niobium alloy material surface
At first elemental metalpowder (Ta) is mixed with the atomic ratio of non-metallic element powder (C) by 1: 1; adding caking agent (aqueous sucrose solution) then and stir in mixture makes mixture in the pasty state; then pasty mixture evenly being coated on niobium alloy material surface formation thickness to be strengthened is the coating of 2mm; the point-like thermal source that adopts argon-arc welding gun to produce under the argon gas atmosphere protection is lined by line scan to the coating that the niobium alloy material surface forms again; the working current of argon-arc welding gun is 200A; the relative moving speed of control point-like thermal source and niobium alloy material is 5mm/s in the process of lining by line scan; scanning line spacing is 5mm, cools off the niobium alloy material that obtains surface strengthening at last under the argon gas atmosphere protection.
Present embodiment adds under the acting in conjunction of heat release combination reaction between point-like thermal source and Ta, C powder outside; generate the Ta-C melt; after under argon shield, cooling off; what the alloy base material surface obtained one deck densification is the overlay of principal phase with TaC; the thickness of overlay is greater than 500 μ m; have one to have component gradient and the transition layer of organizing gradient between overlay and the alloy base material, hardness is between overlay and alloy base material.
Embodiment 8
The reinforcement of niobium alloy material surface
The enhancement method of present embodiment is identical with embodiment 7, and wherein difference is: elemental metalpowder is Hf or Zr, perhaps is at least two kinds among Ta, Hf and the Zr; The non-metallic element powder is B or Si, perhaps is at least two kinds among C, B and the Si.
Present embodiment adds under the acting in conjunction of heat release combination reaction between point-like thermal source and elemental metalpowder and non-metallic element powder outside; coating generates melt on alloy base material; after under argon shield, cooling off; the alloy base material surface obtains the overlay of one deck densification; have one to have component gradient and the transition layer of organizing gradient, no tangible straight interface between overlay, transition layer and alloy base material between overlay and the alloy base material.
Embodiment 9
The reinforcement on titanium alloy material surface
At first elemental metalpowder (Ta) is mixed with the atomic ratio of non-metallic element powder (C) by 1: 1; adding caking agent (starch caking agent) then and stir in mixture makes mixture in the pasty state; then pasty mixture evenly being coated on formation thickness in titanium alloy material surface to be strengthened is the coating of 1mm; the point-like thermal source that adopts argon-arc welding gun to produce under the argon gas atmosphere protection is lined by line scan to the coating that the titanium alloy material surface forms again; the working current of argon-arc welding gun is 120A; the relative moving speed of control point-like thermal source and titanium alloy material is 10mm/s in the process of lining by line scan; scanning line spacing is 2mm, cools off the titanium alloy material that obtains surface strengthening at last under the argon gas atmosphere protection.
Present embodiment adds under the acting in conjunction of heat release combination reaction between point-like thermal source and Ta, C powder outside; generate the Ta-C melt; after under argon shield, cooling off; what the alloy base material surface obtained one deck densification is the overlay of principal phase with TaC; have one to have component gradient and the transition layer of organizing gradient, no tangible straight interface between overlay, transition layer and alloy base material between overlay and the alloy base material.
Embodiment 10
The reinforcement on titanium alloy material surface
The enhancement method of present embodiment is identical with embodiment 9, and wherein difference is: elemental metalpowder is Hf or Zr, perhaps is at least two kinds among Ta, Hf and the Zr; The non-metallic element powder is B or Si, perhaps is at least two kinds among C, B and the Si.
Present embodiment adds under the acting in conjunction of heat release combination reaction between point-like thermal source and elemental metalpowder and non-metallic element powder outside; coating generates melt on alloy base material; after under argon shield, cooling off; the alloy base material surface obtains the overlay of one deck densification; have one to have component gradient and the transition layer of organizing gradient, no tangible straight interface between overlay, transition layer and alloy base material between overlay and the alloy base material.
The above; it only is preferred embodiment of the present invention; be not that the present invention is done any restriction, everyly any simple modification that above embodiment did, change and equivalent structure changed, all still belong in the protection domain of technical solution of the present invention according to the invention technical spirit.
Claims (7)
1. metal material surface enhancement method, it is characterized in that, this method is: at first elemental metalpowder and non-metallic element powder are mixed by 2: 1～4 atomic ratio, adding caking agent then and stir in mixture makes mixture in the pasty state, then pasty mixture evenly is coated on metal material surface to be strengthened and forms coating, under argon gas atmosphere is protected, adopt the point-like thermal source that the coating that metal material surface forms is lined by line scan again, under the argon gas atmosphere protection, cool off the metallic substance that obtains surface strengthening at last; Described metallic element is a yttrium, and described non-metallic element is one or more among C, B and the Si.
2. a kind of metal material surface enhancement method according to claim 1 is characterized in that described yttrium is one or more among Ta, Hf and the Zr.
3. a kind of metal material surface enhancement method according to claim 1 is characterized in that, described caking agent is water glass, starch caking agent or aqueous sucrose solution.
4. a kind of metal material surface enhancement method according to claim 1 is characterized in that the thickness of described coating is 0.1mm～2mm.
5. a kind of metal material surface enhancement method according to claim 1 is characterized in that described point-like thermal source is produced by argon-arc welding gun.
6. a kind of metal material surface enhancement method according to claim 5 is characterized in that the working current of described argon-arc welding gun is 50A～200A.
7. a kind of metal material surface enhancement method according to claim 1 is characterized in that, control point-like thermal source is 1mm/s～10mm/s with the relative moving speed of metallic substance to be strengthened in the described process of lining by line scan, and scanning line spacing is 1mm～5mm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102400086A (en) * | 2011-11-24 | 2012-04-04 | 苏州大学 | Titanium alloy oxygen permeation surface strengthening treatment method |
| CN104831268A (en) * | 2015-04-03 | 2015-08-12 | 航天材料及工艺研究所 | Preparation method of composite alloy coating on tantalum-tungsten alloy |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1197126A (en) * | 1997-04-22 | 1998-10-28 | 山东矿业学院 | Method for hardening surface of metal parts |
| CN101012561A (en) * | 2007-02-01 | 2007-08-08 | 天津工业大学 | Aluminum alloy surface strengthening method using laser melting and coating |
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2011
- 2011-07-10 CN CN 201110191708 patent/CN102230175A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1197126A (en) * | 1997-04-22 | 1998-10-28 | 山东矿业学院 | Method for hardening surface of metal parts |
| CN101012561A (en) * | 2007-02-01 | 2007-08-08 | 天津工业大学 | Aluminum alloy surface strengthening method using laser melting and coating |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102400086A (en) * | 2011-11-24 | 2012-04-04 | 苏州大学 | Titanium alloy oxygen permeation surface strengthening treatment method |
| CN104831268A (en) * | 2015-04-03 | 2015-08-12 | 航天材料及工艺研究所 | Preparation method of composite alloy coating on tantalum-tungsten alloy |
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Application publication date: 20111102 |