CN103668171A - Combined treatment method for prolonging life of oversized shearing equipment tool - Google Patents
Combined treatment method for prolonging life of oversized shearing equipment tool Download PDFInfo
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- CN103668171A CN103668171A CN201310723165.7A CN201310723165A CN103668171A CN 103668171 A CN103668171 A CN 103668171A CN 201310723165 A CN201310723165 A CN 201310723165A CN 103668171 A CN103668171 A CN 103668171A
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- 238000000034 method Methods 0.000 title claims description 20
- 238000010008 shearing Methods 0.000 title abstract description 8
- 239000011248 coating agent Substances 0.000 claims abstract description 11
- 238000000576 coating method Methods 0.000 claims abstract description 11
- 238000012545 processing Methods 0.000 claims abstract description 10
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract 4
- 238000010521 absorption reaction Methods 0.000 claims description 13
- 238000013329 compounding Methods 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 6
- 239000005030 aluminium foil Substances 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 238000009659 non-destructive testing Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 20
- 239000002131 composite material Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000035939 shock Effects 0.000 abstract description 4
- 238000003672 processing method Methods 0.000 abstract 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 20
- 230000035882 stress Effects 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005480 shot peening Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003685 thermal hair damage Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- Cutting Tools, Boring Holders, And Turrets (AREA)
Abstract
延长超大剪切装备刀具寿命的复合处理方法，涉及机械制造与材料处理加工应用技术领域，本发明利用TiN表面涂层提高超大型剪切装备刀具的硬度、耐磨性和耐高温性，再利用激光冲击产生的高幅值残余压应力层，有效地改善超大型剪切装备刀具的机械性能，特别能大幅度提高材料的疲劳寿命。The composite processing method for prolonging the service life of super-large shearing equipment tools relates to the technical field of mechanical manufacturing and material processing and processing applications. The invention uses TiN surface coating to improve the hardness, wear resistance and high temperature resistance of super-large shearing equipment tools, and reuses The high-amplitude residual compressive stress layer produced by laser shock can effectively improve the mechanical properties of ultra-large shearing equipment tools, especially the fatigue life of materials can be greatly improved.
Description
Technical field
The present invention relates to machinofacture and material processing processed and applied technical field, relate in particular to the mechanical property modification technology that ultra-large type is sheared cutter in equipment.
Background technology
In advanced manufacturing technology, laser-impact processing technology is as the Typical Representative of high energy beam, it is a kind of processing means with good prospect, its principle is that shockwave and the material of high-energy short-pulse laser induction interacts, the high-pressure shocking wave that utilizes light laser and material effect to produce improves mechanical property, the especially fatigue lifetime of material.This technology is widely applied in all trades and professions such as mechanical engineering, boats and ships, aviation, microelectronics, and this technology is mainly used in material modification, metal shock peening and shaping at present, and the aspect such as nondestructive testing.
Titanium nitride (TiN) is a kind of non-metering compound, has the feature of Metallic Solids and covalent crystal simultaneously, and fusing point is up to 2955 ℃.As top coat, TiN has the good comprehensive mechanical properties such as high rigidity, wear-resistant, high temperature resistant, anti-thermal shock, frictional coefficient be low, is one of thin-film material of studying at present and being most widely used.TiN is successfully applied to as coating, on the instruments such as cutter, drill bit, be considered to the revolution in metal cutting tool technograph.
Ultra-large type is sheared equipment cutter and usually the steel material in 350 ℃ of left and right is implemented to shearing blanking, is subject to steel billet temperatures involved.Ultra-large type is sheared equipment cutter in shear history, also can be subject to the impact of shearing force, squeeze and frictional force.The phenomenon such as brittle failure, tipping therefore often occur, wear and tear, pull.
The patent No. is the Chinese patent of CN103205728 cutting tool of disclosing surface modified coat and preparation method thereof, adopts CVD method depositing TiN layer, TiCN layer, TiCO layer and α-Al successively on tool matrix
2o
3layer, can directly obtain coated cemented carbide endmill, but the coating that obtains with CVD method is all thinner, and coating and matrix be mechanical bond, and bonding surface intensity is low, and use floating coat easily peels off.
Summary of the invention
The object of the invention is to solve existing ultra-large type and shear the singularity requirement that the cutter material of equipment can not meet extraordinary military service, a kind of compounding method that ultra-large type is sheared equipment cutter life that extends is provided.
The present invention includes following steps:
1) blade of cutter is carried out to nondestructive testing, determine the rejected region of blade;
2) rejected region of blade is made to TiN top coat;
3) TiN top coat is carried out to laser-impact.
The present invention utilizes TiN top coat to improve hardness, wear resistance and high thermal resistance that ultra-large type is sheared equipment cutter, the high amplitude residual compressive stress layer that recycling laser-impact produces, effectively improve ultra-large type and shear the mechanical property of equipment cutter, can increase substantially especially the fatigue lifetime of material.
Beneficial effect of the present invention:
(1) TiN in the method is at tool surface original position composition generation, rather than at surface deposition, does not therefore have the bonding force problem of coating and matrix; The tool surface thickness that original position is compounded with TiN can reach 500 to 600 μ m, more than microhardness can reach HV1700 to HV1800, even if therefore in use there is wiping on surface, still has good hardness and wear resistance.
(2) the method generation unrelieved stress belongs to low temperature unrelieved stress, and the depth of residual stress that laser-impact forms is than the dark approximately 10 times of left and right of mechanic shot peening, and its unrelieved stress is difficult for producing thermal stresses and discharges in cutter shear history.
(3) can meet the multiple performance requriements of workpiece: this compounding method can not only be sheared equipment tool surface strengthening modification to ultra-large type, and be applicable to ultra-large type and shear other structural part of equipment, improve workpiece wear resistance, high thermal resistance, fatigue resistance and erosion resistance, so greatly improve the fatigue lifetime of workpiece;
(4) after this Combined Processing, the distortion of tool surface is very little, does not affect material heart portion performance.TiN coating can not change tool surface pattern, during laser-impact tool surface, due to the time compole of laser-impact short (ns magnitude), cutter is not almost subject to heat affecting, its surface temperature is only 120 ℃ of left and right, therefore it is mainly to utilize its high pressure mechanics effect and non-thermal effect that laser-impact is processed, thereby laser-impact treatment process can be classified as to cold machining process.After Combined Processing substantially indeformable, the outward appearance of workpiece evenly, beautiful, can be used as product and finally process;
(5) this composite treatment technology simple and fast, efficiency are high, and production maintenance cost is low, can realize continuous operations, has guaranteed the high-level efficiency of products production;
(6) this composite treatment technology feature of environmental protection is excellent, without any pollution.Secondary pollution to environment while avoiding the ways of recycling such as employing is melted down, smelting is green manufacturing again.
For at metal surface original position composition generation TiN, realize the strengthening of metallic surface and raising wear resistance, the present invention is in described step 2) in, first polishing and cleaning are carried out in the surface of cutter, and then apply with technical pure TiO at the rejected region of blade
2powder bed, finally take nitrogen as protection gas and plasma source of the gas, by plasma arc to the TiO on blade
2powder bed scans.
Rejected region at blade applies with technical pure TiO
2the thickness of powder bed is 1.5～2mm.Rejected region at blade applies technical pure TiO
2this thickness of powder bed can be guaranteed in the performance of metal surface original position composition generation TiN best.
In order further to improve the performance at metal surface original position composition generation TiN, described nitrogen flow is 10～14L/min, and the sweep velocity of plasma arc is 400～600mm/min, and arc-plasma current is 30～60A, and the flow of plasma arc is 12～18L/min.
In described step 3), first with alcohol, tool surface is cleaned, after drying, on the blade with TiN coating, be coated with absorption layer, under the effect of restraint layer, to scribbling the region of absorption layer on blade, carry out laser-impact processing.The effect of absorption layer is the absorption that farthest improves material for laser light energy, and is fixed on together with cutter on worktable, is beneficial to laser-impact.The effect of restraint layer is not Stimulated Light thermal damage of protecting materials surface, and the plasma stock wave that laser-impact produces is fully expanded under constraint, effectively improves shock peening effect.
Described absorption layer is pitch-dark or aluminium foil.
Described restraint layer is water or glass.
In order to reach the required shortest time of cutter material generation local plastic deformation, the distortion of material generation dynamic plasticity, in ductile bed, exist residual compressive stress, material dislocation desity is extended, material yield intensity is improved, thereby the life-span of material is extended, the single pulse energy of the laser that the present invention adopts is 35J, the output wavelength of laser is 10.6 μ m, and spot diameter is 5mm.
Accompanying drawing explanation
Fig. 1 microhardness that is tool surface after different process is processed and apart from the graph of a relation of tool surface spacing.
Embodiment
One, repair process technique:
Example one:
1, first the cutter of high temperature alloy is carried out to nondestructive testing, determine cutter blade mechanical property Ruo district, determine blade treatment sites to be composite.
2, make TiN top coat:
First to shearing the surface of equipment cutter, carry out polishing, then with alcohol, cutter blade is strictly cleaned, then in blade treatment sites to be composite, apply with technical pure TiO
2powder, TiO
2powder thickness is 1.5mm, and plasma arc is with N
2gas is as protection gas and plasma source of the gas, N
2gas flow is 12～18L/min, and plasma arc scans with 400～600mm/min speed, and arc-plasma current is 30～60A.Detection shows can to reach the TiN layer of 500 μ m at tool steel top layer original position composition generation thickness, and microhardness can reach HV1800.
Rejected region at blade applies with technical pure TiO
2the thickness of powder bed can be the uniform thickness of 1.5～2mm.
3, laser-impact, is specially:
First with alcohol, clean tool surface, after dry, on the TiN of blade top coat, coat pitch-dark (main component is acrylic paint) as absorption layer, by scribbling pitch-dark cutter, be fixed on worktable, take flowing water as restraint layer, to scribbling pitch-dark region on blade, carry out laser-impact processing, laser energy is 35J, and output wavelength is 10.6 μ m, spot diameter is 5mm, finally with alcohol, cleans the pitch-dark of impact zone.
Example two:
Basic identical with the step of example one, different is: the absorption layer in laser-impact step adopts pitch-dark, and restraint layer adopts glass, after laser-impact completes, removes glass, and cleans the pitch-dark of impact zone with alcohol.
Example three:
Basic identical with the step of example one, different is: the absorption layer in laser-impact step adopts aluminium foil, and restraint layer adopts water, after laser-impact completes, removes aluminium foil.
Example four:
Basic identical with the step of example one, different is: the absorption layer in laser-impact step adopts aluminium foil, and restraint layer adopts glass, after laser-impact completes, removes the glass of restraint layer and the aluminium foil of absorption layer.
Two, result verification:
Three curves in Fig. 1 are respectively: tool surface is microhardness and apart from the relation of tool surface spacing, tool surface microhardness and apart from the relation of tool surface spacing, tool surface microhardness and apart from the relation of tool surface spacing after TiN coating and laser-impact are processed after TiN coating is processed after TiN coating is processed not.
As seen from Figure 1, after composite reinforcement process of the present invention, cutter hardness is significantly higher than other technique, its surface becomes compressive stress state from residual stress state from tensile stress, the performances such as its fatigue lifetime and wear resistance are significantly improved, and this is significant to improving ultra-large type shearing equipment cutter material performance.
Claims (8)
1. extend the compounding method that super large is sheared equipment cutter life, it is characterized in that comprising the steps:
1) blade of cutter is carried out to nondestructive testing, determine the rejected region of blade;
2) rejected region of blade is made to TiN top coat;
3) TiN top coat is carried out to laser-impact.
2. compounding method according to claim 1, is characterized in that in described step 2) in, first polishing and cleaning are carried out in the surface of cutter, and then apply with technical pure TiO at the rejected region of blade
2powder bed, finally take nitrogen as protection gas and plasma source of the gas, by plasma arc to the TiO on blade
2powder bed scans.
3. compounding method according to claim 2, is characterized in that the described rejected region at blade applies with technical pure TiO
2the thickness of powder bed is 1.5～2mm.
4. according to compounding method described in claim 2 or 3, it is characterized in that described nitrogen flow is 10～14L/min, the sweep velocity of plasma arc is 400～600mm/min, and arc-plasma current is 30～60A, and the flow of plasma arc is 12～18L/min.
5. compounding method according to claim 1; it is characterized in that in described step 3); first with alcohol, tool surface is cleaned; after drying; on the blade with TiN coating, be coated with absorption layer; under the protection of restraint layer, to scribbling the region of absorption layer on blade, carry out laser-impact processing.
6. compounding method according to claim 5, is characterized in that described absorption layer is pitch-dark or aluminium foil.
7. compounding method according to claim 5, is characterized in that described restraint layer is water or glass.
8. according to compounding method described in claim 5 or 6 or 7, the energy that it is characterized in that laser is 35J, and the output wavelength of laser is 10.6um, and spot diameter is 5mm.
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|---|---|---|---|
| CN201310723165.7A CN103668171A (en) | 2013-12-25 | 2013-12-25 | Combined treatment method for prolonging life of oversized shearing equipment tool |
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| CN201310723165.7A CN103668171A (en) | 2013-12-25 | 2013-12-25 | Combined treatment method for prolonging life of oversized shearing equipment tool |
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| CN104947035A (en) * | 2015-06-19 | 2015-09-30 | 沈阳理工大学 | Method for enabling metal surface to penetrate nano powder by laser-induced impact |
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