CN205368498U - Adopt metallurgical device of realizing steel surface nitrogen pick -up of nitrogen arc and nitride normal position - Google Patents
Adopt metallurgical device of realizing steel surface nitrogen pick -up of nitrogen arc and nitride normal position Download PDFInfo
- Publication number
- CN205368498U CN205368498U CN201620009351.3U CN201620009351U CN205368498U CN 205368498 U CN205368498 U CN 205368498U CN 201620009351 U CN201620009351 U CN 201620009351U CN 205368498 U CN205368498 U CN 205368498U
- Authority
- CN
- China
- Prior art keywords
- nitrogen
- powder
- gas
- groove
- spiral
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 245
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 125
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 65
- 239000010959 steel Substances 0.000 title claims abstract description 65
- 150000004767 nitrides Chemical class 0.000 title claims abstract description 37
- 239000000843 powder Substances 0.000 claims abstract description 163
- 239000007789 gas Substances 0.000 claims abstract description 118
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000003466 welding Methods 0.000 claims description 31
- 238000011065 in-situ storage Methods 0.000 claims description 23
- 238000005272 metallurgy Methods 0.000 claims description 19
- 230000002146 bilateral effect Effects 0.000 claims description 8
- 239000000919 ceramic Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 64
- 239000000956 alloy Substances 0.000 abstract description 40
- 229910045601 alloy Inorganic materials 0.000 abstract description 40
- 238000000034 method Methods 0.000 abstract description 30
- 239000000203 mixture Substances 0.000 abstract description 19
- 230000008569 process Effects 0.000 abstract description 17
- 238000005275 alloying Methods 0.000 abstract description 13
- 229910052751 metal Inorganic materials 0.000 abstract description 8
- 239000002184 metal Substances 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000010891 electric arc Methods 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 238000004381 surface treatment Methods 0.000 abstract description 3
- 238000003756 stirring Methods 0.000 abstract 2
- 241001062472 Stokellia anisodon Species 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 238000005121 nitriding Methods 0.000 description 28
- 229910052742 iron Inorganic materials 0.000 description 12
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 8
- 239000002994 raw material Substances 0.000 description 6
- 239000007921 spray Substances 0.000 description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 4
- 239000011651 chromium Substances 0.000 description 4
- 239000011572 manganese Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000008246 gaseous mixture Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000007751 thermal spraying Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910018540 Si C Inorganic materials 0.000 description 1
- 241001417490 Sillaginidae Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- CXOWYMLTGOFURZ-UHFFFAOYSA-N azanylidynechromium Chemical compound [Cr]#N CXOWYMLTGOFURZ-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000010849 ion bombardment Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The utility model belongs to material surface treatment field, specifically for a device that adopts the quick high -nitrogen steel ization in the metallurgical nitrogen pick -up technology steel surface of nitrogen arc and nitride normal position, pass through the coaxial spiral gas of bi -pass powder cover misce bene with nitride alloy powder and iron powder, deliver to pending steel mother metal on the surface after the nitrogen arc heating, add heat fusing nitride alloy powder with nitrogen arc simultaneously, iron powder and partial mother metal, stir the molten bath through the electromagnetic stirring of electric arc and welder's swing, make the alloying element in the molten bath fully smelt the mixture with fusional mother metal, the molten bath cooling is solidified and to be formed the high -nitrogen steel layer on the steel surface. The utility model discloses high -nitrogen steel layer nitrogen content after the processing is high, is greater than conventional surperficial nitrogen pick -up far away and handles the biggest nitrogen content that can obtain. And the real -time regulation through the nitrogen pick -up process, can obtain the high -nitrogen steel layer of variance component and performance.
Description
Technical field
This utility model relates to field of material surface treatment, is specially a kind of device adopting nitrogen arc and nitride in-situ metallurgy nitrogen pick-up to realize the quick high nitrogen steel in steel surface.
Background technology
The increasing method for nitrogen on conventional surface has gas nitriding and glow discharge nitriding.
Gas nitriding can adopt general nitriding process (i.e. single stage nitriding) or multistage (two-stage nitration, three sections) nitriding process.The former is that nitriding temperature and ammonia decomposition remain unchanged in whole nitriding process.Temperature is typically between 480～520 DEG C, and ammonia decomposition is 15～30%, nearly 80 hours of temperature retention time.This technique is applicable to the part that infiltration layer is shallow, distortion requires sternly, hardness requirement is high, but processes overlong time.Multiple stage nitriding be in whole nitriding process, be respectively adopted different temperatures by different phase, different ammonia dissociation rate, different time carry out nitriding and diffusion.Whole nitriding time can shorten to nearly 50 hours, can obtain deeper infiltration layer, but so nitriding temperature is higher, distorts bigger.
Glow discharge nitriding utilizes glow discharge principle to carry out.Compared with general gas nitriding, glow discharge nitriding is characterized in: 1. can suitably shorten the nitriding cycle；2. nitriding layer fragility is little；3. the consumption of the energy and ammonia can be saved；4. the part maskable not needing nitriding is got up, it is achieved selective nitriding；5. ion bom bardment has purification surface action, can remove surface of the work passivating film, can make rustless steel, the direct nitriding of heat resisting steel workpiece；6. alloying layer thickness and tissue can control.But its equipment controls complexity, and the uniformity of furnace temperature is bad.
In summary, conventional both nitriding methods, need conditioning treatment modified before nitriding and conditioning treatment destressing processes, and the surface roughness Ra of nitriding part should be less than 1.6um etc. restriction simultaneously.The cycle length of Nitrizing Treatment technique, nitriding layer are thin, temperature control requirement is tight, the surface preparation of part requiring, strict, equipment controls complexity.Two kinds of gas nitriding process are required for carrying out in airtight environment, and length consuming time, and nitriding layer is thin, nitrogen increased amount is low, nitrogen pick-up composition of layer is non-adjustable.
For other process for treating surface, as conventional thermal spraying, surfacing and built-up welding can also be used for the nitrogen pick-up process of material surface.Thermal spraying on surface nitrogen pick-up is owned by France in nitride ceramics spraying technology, is not metallurgical binding, and hot spray process is higher to the pre-processing requirements of substrate surface simultaneously, it is necessary to carries out roughening treatment, and requires higher to the particle diameter of spray coating powder.
Traditional spray welding technology can make powder or welding wire, it is possible to form metallurgical binding with mother metal, but the dilution rate of spray-welding coating is high, general about 5%～10%, and need the pre-heat treatment, the fusing point of spray material requires lower than matrix fusing point, meanwhile, in spray process, the composition of the high nitrogen layer of surfacing is non-adjustable.Welding wire is generally used in built-up welding, and overlay cladding composition can only be component of weld wire, and overlay cladding composition can not design, and namely with overlaying method, steel surface is carried out nitrogen pick-up process, and the composition of the nitrogen pick-up layer obtained can not design.
Chinese patent (201310398151.2) discloses and a kind of uses high velocity oxy-fuel thermal spray and plasma nitriding for the method and system of mould compensation and reparation.The nitrogen pick-up composition of layer obtained can not design, thickness is thin, and alloy particle diameters requires strict.Chinese patent (201110309131.4) relates to a kind of reaction nitrogen arc fusing and coating wear-resistant coating preparation technology remanufacturing reparation based on part.The slurry of modulation is coated in after piece surface dries, uses nitrogen arc deposition, not Nitrogen element in slurry, only by nitrogen arc nitrogen pick-up DeGrain, and drying and require time for, hydrogen induced cracking may be caused if drying completely.And nitride alloy powder is directly laid on pending steel surface by this utility model, adopt nitrogen arc in-situ metallurgical, it is not necessary to increasing stoving process, and have employed nitride and nitrogen arc associating nitrogen pick-up technology, nitrogen pick-up effect is obvious and consuming time short.Chinese patent (201310650075.X) discloses a kind of plasma arc and adds the method that nitrogen smelts nitrogen containing metal material, fill high pressure nitrogen condition plasma arc specifically by vacuum purification and add nitrogen melting steel billet, needing to add vacuum, preparation condition is harsh, and final nitrogen increased amount is low.
Utility model content
The purpose of this utility model there are provided a kind of device adopting nitrogen arc and nitride in-situ metallurgy to realize the nitrogen pick-up of steel surface.
A kind of device adopting nitrogen arc and nitride in-situ metallurgy to realize the nitrogen pick-up of steel surface, including:
One non-consumable gas shielded arc welding rifle；
A pair of colludes axle gas powder transporter, is provided with non-consumable gas shielded arc welding rifle with axial screw gas powder cover, has, in spiral gas powder cover, the screw thread being fastenedly connected with non-consumable gas shielded arc welding rifle in it；
The coaxial transporter of gas powder is interior, spiral gas powder cover is externally provided with two the powder feeding plenum ducts tangent with spiral gas powder cover outer wall；
Described powder feeding plenum duct has air taking port and powder feeding mouth；The inwall of described spiral gas powder cover has spiral gas powder groove.
Spiral gas powder groove is for becoming helical-varying pitch-variable section structure, and spiral gas powder groove includes double spiral groove, heavy in section single helical groove, small bore single helical groove, and described groove is half slot；Spiral gas powder groove top is double-stranded double spiral groove near gas powder feeder connection place, and groove diameter is 4mm～7mm, and described double-spiral structure has at least three circles；
The double spiral groove that two gas powder channel connections two are adjacent；
What be connected with double spiral groove is heavy in section single helical groove, and groove diameter is 7mm～12mm；Groove width increases to ensure that nitride alloy powder and iron powder are sufficiently mixed uniformly, and what be connected with heavy in section single helical groove is small bore single helical groove, and groove diameter is 4mm～7mm.
From the top to the bottom, its lead angle tends to the straight angle to spiral gas powder groove gradually, and spiral gas powder groove lead angle is 0 °～60 °；The lead angle that spiral gas powder groove exports at spiral gas powder cover is 0 °～5 °.
Spiral gas powder cover adopts heat proof material SiC ceramic to manufacture.
Powder feeding mouth as above and air taking port are respectively provided with powder feeding speed regulator and gas flowmeter.
The gas powder outlet of spiral gas powder cover as above is in necking down shape, and the extended line in necking down face points to arc center.
Manufacturing heat-barrier material parcel, described non-consumable gas shielded arc welding rifle by SiC ceramic outside non-consumable gas shielded arc welding rifle as above, the reach of its outer upper processing is at least the twice of its diameter.
This utility model also provides for a kind of method adopting nitrogen arc and nitride in-situ metallurgy to realize the nitrogen pick-up of steel surface, comprises the following steps that
Step 1, by the subject alloy composition of target high nitrogen steel layer, it is determined that iron content WFe%；Determine that iron powder is supplied gas as first the powder feeding raw material of powder feeding passage；
Subject alloy composition according to target high nitrogen steel layer, it is determined that the second powder feeding raw material supplying gas powder feeding passage, in alloy powder, the content Wif% ratio of alloying element i, is corrected relational expression WifRevise% ≈ Wif% × (1+ μ i+ ξ) obtains the correction value Wif of alloying element i content in powder after revisingRevise%；Wherein μ i is scaling loss coefficient, μ i=0.2%～5%, and ξ is scattering spatter loss coefficient, ξ=2%～8%；Described second supply gas powder feeding passage powder feeding raw material alloy powder in alloying element i for ferrum.
Step 2, the relational expression according to the content Wi% of the alloying element i outside deironing element in target high nitrogen steel Yu iron contentObtain composition ratio α: β of all alloying elements and ferrum element；Determine the alloy powder quality m sending into molten bathAlloy powderQuality m with iron powderIron powderRatio is for α: β, if the alloy powder quality m entered in molten bathAlloy powder=Vf × Δ t, if entering the iron powder quality m in molten bathIron powder=VFe× Δ t, wherein Vf is alloy powder powder feeding rate, and unit is g/min；VFeFor adding iron powder speed, unit is g/min；Δ t is the time, and unit is min；
Step 3, according to formula mAlloy powder:mIron powder=(Vf × Δ t): (VFe× Δ t)=α: β, it is determined that alloy powder powder feeding rate Vf and interpolation iron powder speed VFeParameter matching relationship, Vf:VFe=α: β；
Step 4, choosing suitable welding current size I is 80A～200A；Choose interpolation iron powder speed VFeFor 20g/min～150g/min；By formula Vf:VFe=α: β, it is determined that alloy powder powder feeding rate Vf；
Step 5, starts welder, adjusts the surface distance 8-15mm of the required process steel that welding gun arrives, and adopts welding current I, alloy powder powder feeding rate Vf, and speed of supplying gas is VGas 1, add iron powder speed VFe, speed of supplying gas is VGas 2, at non-consumable gas shielded arc welding rifle by 10%Ar and 90%N2Gaseous mixture, regulating its speed is VGas 3, weld, steel surface carried out in-situ metallurgical nitrogen pick-up process.
Further, bonding speed v is 3～16mm/min.
Further, speed of supplying gas is VGas 1, speed of supplying gas is VGas 2；Speed of supplying gas is VGas 3, meet VGas 1≈VGas 2≈VGas 3=15～40L/min.
This utility model compared with prior art has following remarkable advantage:
1, the method that this utility model provides can realize the nitrogen pick-up of steel surface high nitrogen steel at short notice, it is thus achieved that nitrogen pick-up layer thickness up to several millimeters even Centimeter Level, and nitrogen pick-up composition of layer can design；
2, the device that this utility model provides is double-spiral structure at the bilateral coaxial spiral gas powder cover helicla flute near gas powder passway place, can effectively prevent powder blocking channel mouth；Heavy in section, middle part single coil configuration groove contributes to being sufficiently mixed of two kinds of gas powder streams；Varying pitch, change lead angle contribute to the Homogeneous phase mixing of gas powder stream.
3, the method that this utility model provides not only achieves steel surface nitrogen pick-up effect, it is also possible to adding other useful alloy elements, it is achieved steel surface high nitrogen steel, the nitrogen pick-up layer obtained has good high strength anti-corrosion performance.Being metallurgical binding between the nitrogen pick-up layer and the steel matrix that obtain, bond strength is high.
4, this utility model adopts nitrogen arc and nitride alloy associating in-situ metallurgical nitrogen pick-up technology, simple to operate, it is possible to by regulating size of current and welding gun translational speed flexible nitrogen pick-up layer thickness.To not needing the place of nitrogen pick-up also without taking protective measure, it may be achieved local nitrogen pick-up.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that nitrogen arc and nitride in-situ metallurgy realize steel surface nitrogen pick-up device；
Fig. 2 is the longitudinal sectional view of bilateral coaxial spiral gas powder cover；
Fig. 3 is nitrogen arc and nitride in-situ metallurgy realizes the sectional view of section A-A of steel surface nitrogen pick-up device；
Wherein, 1 is the first air taking port, 2 first powder feeding mouths, and 3 is bilateral coaxial spiral gas powder cover, 4 second air taking ports, and 5 is the second powder feeding mouth, and 6 is spiral gas powder groove, and 7 is non-consumable gas shielded arc welding rifle；
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, a kind of method adopting nitrogen arc and nitride composite in-situ metallurgy to realize the nitrogen pick-up of steel surface described in the utility model is further described.
This utility model adopts nitrogen arc and nitride in-situ metallurgy to realize the device of steel surface nitrogen pick-up, including:
One non-consumable gas shielded arc welding rifle 7；
A pair of colludes axle transporter, is provided with non-consumable gas shielded arc welding rifle 3 with axial screw gas powder cover 3, has, in spiral gas powder cover 3, the screw thread being fastenedly connected with non-consumable gas shielded arc welding rifle 7 in it；
In the coaxial transporter of bilateral gas powder, spiral gas powder cover 3 be externally provided with two the powder feeding plenum ducts tangent with spiral gas powder cover 3 outer wall, respectively the first powder feeding passage and second of supplying gas is supplied gas powder feeding passage；
First powder feeding passage of supplying gas has the first air taking port 1 and the first powder feeding mouth 2；Second powder feeding passage of supplying gas has the second air taking port 3 and the second powder feeding mouth 4；
The inwall of spiral gas powder cover 3 has spiral gas powder groove 6.
Spiral gas powder groove 6 is for becoming helical-varying pitch-variable section structure, and spiral gas powder groove 6 includes double spiral groove, heavy in section single helical groove, small bore single helical groove, and groove is half slot；Spiral gas powder groove 6 top is double-stranded double spiral groove near gas powder feeder connection place, and groove diameter is 4mm～7mm, and double-spiral structure has at least three circles；
The double spiral groove place that two gas powder channel connections two are adjacent；
What be connected with double spiral groove is heavy in section single helical groove, and groove diameter is 7mm～12mm；What be connected with heavy in section single helical groove is small bore single helical groove, and groove diameter is 4mm～7mm.
From the top to the bottom, its lead angle tends to the straight angle to spiral gas powder groove 6 gradually, and spiral gas powder groove 6 lead angle is 0 °～60 °；The lead angle that spiral gas powder groove 6 exports at spiral gas powder cover 3 is 0 °～5 °.
Spiral gas powder cover 3 adopts heat proof material SiC ceramic manufacture.
Respectively equipped with powder feeding speed regulator and gas flowmeter on powder feeding mouth and air taking port.
The gas powder outlet of spiral gas powder cover 3 is in necking down shape, and the extended line in necking down face points to arc center.
Manufacturing heat-barrier material parcel, described non-consumable gas shielded arc welding rifle 7 by SiC ceramic outside described non-consumable gas shielded arc welding rifle 7, the reach of its outer upper processing is at least the twice of its diameter.
Nitrogen arc of the present utility model is blanket of nitrogen electric arc, including electric arc and plasma arc；Nitride alloy powder and iron powder are passed through bilateral coaxial gas powder cover mix homogeneously, deliver on pending steel mother metal surface after nitrogen arc heats, add heat fusing nitride alloy powder, iron powder and part mother metal with nitrogen arc simultaneously, by the swing of the electromagnetic agitation of electric arc and welding gun, molten bath is stirred, making the melting abundant with the mother metal of fusing of the alloying element in molten bath mix, molten bath cooled and solidified can form high nitrogen steel layer on steel surface.By controlling the parameter coupling of surface treatment, the high nitrogen steel surface of different nitrogen contents, different-thickness can be obtained.
The nitrogen pick-up principle adopted, on the one hand, nitride alloy powder, iron powder and part steel mother metal add heat fusing in nitrogen arc, nitrogen in nitrogen arc enters molten bath, improve the nitrogen content in molten bath, in nitrogen arc, nitrogen partial pressure is higher simultaneously, it is possible to control to have fused in molten bath the effusion of nitrogen；On the other hand, containing substantial amounts of nitrogen element in nitride alloy powder, also fused in molten bath in nitrogen arc heating process, further increased the nitrogen content in molten bath.Meanwhile, nitride alloy powder is also equipped with the alloying element containing, for example Cr, Mn, Mo etc., with in the high nitrogen steel layer that guarantees nitrogen element to be solid-solubilized in atomic form to be formed.
Embodiment 1
Utilize device as shown in Figure 1, adopt the method that nitrogen arc and nitride in-situ metallurgy realize the nitrogen pick-up of steel surface, obtain the high nitrogen steel layer that thickness is 2mm on Q235B steel surface.The target component of high nitrogen steel layer is as shown in table 1.
The chemical composition of table 1 target high nitrogen steel layer requires (%)
| Chemical composition | N | Mn | Cr | Mo | Si | C | Fe |
| Standard criterion | 0.8-2.4 | 12-18 | 18-23 | 1.0-2.5 | ≤1 | ≤0.1 | Surplus |
Adopting the method that employing nitrogen arc described in the utility model and nitride in-situ metallurgy realize the nitrogen pick-up of steel surface, it concretely comprises the following steps:
Step 1, by the subject alloy composition of target high nitrogen steel layer, it is determined that iron content WFe%；Determine that iron powder is supplied gas as first the powder feeding raw material of powder feeding passage；
Subject alloy composition according to target high nitrogen steel goods, it is determined that alloy powder is the second powder feeding raw material supplying gas powder feeding passage, it is determined that is required as the content Wif% ratio of alloying element i in the nitride alloy powder of powder feeding raw material, is corrected relational expression WifRevise% ≈ Wif% × (1+ μ i+ ξ) obtains the correction value Wif of alloying element i content in powder after revisingRevise%, and prepare nitride alloy powder；Wherein μ i is scaling loss coefficient, μ i=0.2%～5%, and ξ is scattering spatter loss coefficient, ξ=2%～8%；
Nitride alloy powder stock includes: chromium nitride powder, nitrogenized manganese powder, chromium powder, manganese powder, molybdenum powder etc..
When powder presses CrN:MnN:Cr:Mn:Mo=4:4:18.85:11.8:1.5, meet high nitrogen steel layer target component content ratio.According to revising relational expression WifRevise% ≈ Wif% × (1+ μ i+ ξ), revising the formula obtaining material powder is: during CrN:MnN:Cr:Mn:Mo=4:4:19:12:1.5, with iron powder with the use of Q235B steel surface can be made to obtain high nitrogen steel layer, and the theoretical composition of high nitrogen steel layer is N:1.66%, Mn:15%, Cr:22%, Mo:1.5%, surplus is ferrum.
Step 2, the relational expression according to the content Wi% of the alloying element i outside deironing element in target high nitrogen steel Yu iron contentObtain all alloying elements composition with ferrum element than α: β ≈ 2:3；Determine the alloy powder quality m sending into molten bathAlloy powderQuality m with iron powderIron powderRatio is 2:3, enters the alloy powder quality m in molten bathAlloy powder=Vf × Δ t, enters the iron powder quality m in molten bathIron powder=VFe× Δ t, wherein Vf is for adding alloy powder speed, and unit is g/min；VFeFor adding iron powder speed, unit is g/min；Δ t is the time, and unit is min.
Step 3, according to formula mAlloy powder:mIron powder=(Vf × Δ t): (VFe× Δ t)=α: β, it is determined that add alloy powder speed Vf and add iron powder speed VFeParameter matching relationship, Vf:VFe=2:3.
Step 4, chooses suitable electric current I=120A；Choose suitable interpolation iron powder speed VFe=75g/min；Secondly, by formula Vf:VFe=α: β, draw interpolation alloy powder speed Vf=52g/min；Bonding speed v generally takes 8mm/min.It addition, first supplying gas the logical nitrogen powder feeding of powder feeding passage on the coaxial gas powder transporter of bilateral, its speed of supplying gas is VGas 1；Second supplies gas the logical nitrogen powder feeding of powder feeding passage, and its speed of supplying gas is VGas 2；Welding gun leads to 10%Ar+N2 gaseous mixture, and its speed is VGas 3, meet VGas 1≈VGas 2≈VGas 3=20L/min.
Step 5, utilize nitrogen arc and nitride in-situ metallurgy that starting this utility model provides realize the device of steel surface nitrogen pick-up, and adopting the speed of supplying gas on the coaxial gas powder transporter of bilateral is VGas 1, speed of supplying gas be VGas 2, and the logical 10%Ar+N2 gaseous mixture speed of welding gun is VGas 3, meet VGas 1≈VGas 2≈VGas 3=20L/min, passage two adds nitride alloy powder speed Vf=52g/min, passage one adds iron powder speed V in adjustmentFe=75g/min, welds, and steel surface carries out in-situ metallurgical nitrogen pick-up process.
Q235B steel surface carries out built-up welding deposition with speed v=58.3cm/min, finally obtains the high nitrogen steel layer that thickness is 2mm on Q235B steel surface.
Claims (7)
1. one kind adopts the device that nitrogen arc and nitride in-situ metallurgy realize the nitrogen pick-up of steel surface, it is characterised in that including:
One non-consumable gas shielded arc welding rifle (7)；
A pair of colludes axle transporter; it is provided with in it with non-consumable gas shielded arc welding rifle (7) with axial screw gas powder cover (3), in spiral gas powder cover (3), has the screw thread being fastenedly connected with non-consumable gas shielded arc welding rifle (7)；
In the coaxial transporter of bilateral gas powder, spiral gas powder cover (3) be externally provided with two the powder feeding plenum ducts tangent with spiral gas powder cover (3) outer wall, respectively the first powder feeding passage and second of supplying gas is supplied gas powder feeding passage；
Described first powder feeding passage of supplying gas has the first air taking port (1) and the first powder feeding mouth (2)；Second powder feeding passage of supplying gas has the second air taking port (4) and the second powder feeding mouth (5)；
The inwall of described spiral gas powder cover (3) has spiral gas powder groove (6).
2. employing nitrogen arc according to claim 1 and nitride in-situ metallurgy realize the device of steel surface nitrogen pick-up, it is characterized in that, described spiral gas powder groove (6) is for becoming helical-varying pitch-variable section structure, spiral gas powder groove (6) includes double spiral groove, heavy in section single helical groove, small bore single helical groove, and described spiral gas powder groove (6) is half slot；Spiral gas powder groove (6) top is double-stranded double spiral groove near gas powder feeder connection place, and groove diameter is 4mm～7mm, and described double-spiral structure has at least three circles；
The double spiral groove place that two described gas powder channel connections two are adjacent；
What be connected with described double spiral groove is heavy in section single helical groove, and groove diameter is 7mm～12mm；What be connected with heavy in section single helical groove is small bore single helical groove, and groove diameter is 4～7mm.
3. employing nitrogen arc according to claim 1 and nitride in-situ metallurgy realize the device of steel surface nitrogen pick-up, it is characterized in that, described spiral gas powder groove (6) is from the top to the bottom, its lead angle tends to the straight angle gradually, and spiral gas powder groove (6) lead angle is 0 °～60 °；Spiral gas powder groove (6) is 0 °～5 ° at the lead angle that spiral gas powder cover (3) exports.
4. employing nitrogen arc according to claim 1 and nitride in-situ metallurgy realize the device of steel surface nitrogen pick-up, it is characterised in that described spiral gas powder cover (3) adopts heat proof material SiC ceramic to manufacture.
5. a kind of device adopting nitrogen arc and nitride in-situ metallurgy to realize the nitrogen pick-up of steel surface according to claim 1, it is characterised in that respectively equipped with powder feeding speed regulator and gas flowmeter on described powder feeding mouth and air taking port.
6. employing nitrogen arc according to claim 1 and nitride in-situ metallurgy realize the device of steel surface nitrogen pick-up, it is characterised in that the gas powder outlet of described spiral gas powder cover (3) is in necking down shape, and the extended line in necking down face points to arc center.
7. employing nitrogen arc according to claim 1 and nitride in-situ metallurgy realize the device of steel surface nitrogen pick-up; it is characterized in that; described non-consumable gas shielded arc welding rifle (7) outside SiC ceramic manufactures heat-barrier material parcel; described non-consumable gas shielded arc welding rifle (7), the reach of its outer upper processing is at least the twice of its diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620009351.3U CN205368498U (en) | 2016-01-06 | 2016-01-06 | Adopt metallurgical device of realizing steel surface nitrogen pick -up of nitrogen arc and nitride normal position |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620009351.3U CN205368498U (en) | 2016-01-06 | 2016-01-06 | Adopt metallurgical device of realizing steel surface nitrogen pick -up of nitrogen arc and nitride normal position |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205368498U true CN205368498U (en) | 2016-07-06 |
Family
ID=56275465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620009351.3U Expired - Fee Related CN205368498U (en) | 2016-01-06 | 2016-01-06 | Adopt metallurgical device of realizing steel surface nitrogen pick -up of nitrogen arc and nitride normal position |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205368498U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105525289A (en) * | 2016-01-06 | 2016-04-27 | 江苏烁石焊接科技有限公司 | Device for realizing nitrogen increment on surface of steel through nitrogen arc and nitride in-situ metallurgy |
| CN107022760A (en) * | 2017-04-01 | 2017-08-08 | 三峡大学 | A kind of fabricated in situ oriented growth M7C3The preparation method of coating |
-
2016
- 2016-01-06 CN CN201620009351.3U patent/CN205368498U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105525289A (en) * | 2016-01-06 | 2016-04-27 | 江苏烁石焊接科技有限公司 | Device for realizing nitrogen increment on surface of steel through nitrogen arc and nitride in-situ metallurgy |
| CN105525289B (en) * | 2016-01-06 | 2018-01-05 | 江苏烁石焊接科技有限公司 | A kind of device that steel surface nitrogen pick-up is realized using nitrogen arc and nitride in-situ metallurgy |
| CN107022760A (en) * | 2017-04-01 | 2017-08-08 | 三峡大学 | A kind of fabricated in situ oriented growth M7C3The preparation method of coating |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105618895B (en) | A kind of coaxial 3D printing device of silk powder pneumoelectric arc | |
| CN105772719B (en) | A kind of silk-coaxial 3D printing the method for powder-gas-electric arc | |
| KR100515608B1 (en) | Cold spray apparatus with powder preheating apparatus | |
| CN105522264B (en) | A kind of device using nitrogen arc and nitride 3D printing high nitrogen steel product | |
| CN205368498U (en) | Adopt metallurgical device of realizing steel surface nitrogen pick -up of nitrogen arc and nitride normal position | |
| CN205464721U (en) | Coaxial 3D printing device of silk - powder - gas - electric arc | |
| US11738391B2 (en) | 3D printer with computerized controller for progressive alloy composition characteristic modification | |
| JPH02203932A (en) | Method and apparatus for producing ultrafine particles | |
| CN110560842A (en) | nitrogen fixation device and method in welding based on paraxial wire feeding | |
| CN110587078A (en) | Nitrogen fixation device and method in multi-element activated nitrogen arc welding process | |
| CN105522253B (en) | A kind of nitrogen arc in-situ metallurgical is laid with the device that nitride realizes steel surface nitrogen pick-up in advance | |
| US6544597B2 (en) | Mixed powder thermal spraying method | |
| CN205362963U (en) | Utilize nitrogen arc and nitride 3D to print device of high -nitrogen steel goods | |
| CN105525289B (en) | A kind of device that steel surface nitrogen pick-up is realized using nitrogen arc and nitride in-situ metallurgy | |
| CN105603355B (en) | A kind of method that steel surface nitrogen pick-up is realized using nitrogen arc and nitride in-situ metallurgy | |
| CN205362955U (en) | Device that steel surface nitrogen pick -up was realized to nitride is laid in advance to nitrogen arc normal position metallurgy | |
| CN107447160A (en) | Reduce the smelting process of the residual vanadium of ferrovanadium slag | |
| CN105772906B (en) | A kind of nitrogen arc in-situ metallurgical is laid with the method that nitride realizes steel surface nitrogen pick-up in advance | |
| WO2022017425A1 (en) | Vacuum coating apparatus for uniformly distributing metal vapor using uniform mixing buffer structure | |
| CN115652247A (en) | Powder feeding sleeve for plasma spraying and coating manufacturing method for preventing deposition and nodulation | |
| CN113604627A (en) | Converter oxygen lance structure and carbon-spraying heat supplementing method for converter oxygen lance | |
| CN109848407A (en) | A kind of cobalt-chromium-tungsten alloy cladding tantalum carbide powder and preparation method thereof | |
| WO2017056510A1 (en) | Production method for alloy steel powder for powder metallurgy | |
| CN219752391U (en) | Large-volume intelligent multi-stage purification device | |
| CN112626444A (en) | Supersonic flame spraying nozzle and using method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160706 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |