CN105779997A - Method for cladding nickel-based alloy coating on surface of vermicular graphite cast iron mould after laser pre-heating treatment - Google Patents
Method for cladding nickel-based alloy coating on surface of vermicular graphite cast iron mould after laser pre-heating treatment Download PDFInfo
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- CN105779997A CN105779997A CN201610278408.4A CN201610278408A CN105779997A CN 105779997 A CN105779997 A CN 105779997A CN 201610278408 A CN201610278408 A CN 201610278408A CN 105779997 A CN105779997 A CN 105779997A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/058—Alloys based on nickel or cobalt based on nickel with chromium without Mo and W
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- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
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- Laser Beam Processing (AREA)
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Abstract
The invention discloses a method for cladding a nickel-based alloy coating on the surface of a vermicular graphite cast iron mould after laser pre-heating treatment. The method comprises the following steps: firstly, performing pre-treatment on the surface of a substrate with laser in advance; and then laser-cladding a Ni-based alloy by virtue of a synchronous powder feeding method. The Ni-based coating prepared by the method disclosed by the invention is well bonded with a base body, and is metallurgically bonded; the coating is free of cracks, holes and inclusions, and multiple layers of coatings can be continuously cladded. By virtue of the synchronous powder feeding method, the method disclosed by the invention is simple in process; the alloy powder is high in utilization ratio and good in controllability, and can be continuously stacked and cladded; and coatings with certain thickness can be continuously cladded without the need of repeatedly pre-placing powder. Compared with pre-placed powder feeding, the method is easy to realize automation and industrialization. According to the method disclosed by the invention, the surface of the base body is pre-heated by using laser, the base body is subjected to relatively small influence, and the method is less in energy consumption, simple in process and high in efficiency.
Description
Technical field
The present invention is laser melting and coating technique field, is specifically related to a kind of method of deposited nickel-base alloy coating after vermicular cast iron die surface laser the pre-heat treatment.
Background technology
Cast iron is the phosphorus content iron-carbon alloy more than 2.11%, and melting is simple, with low cost, has excellent casting character and significantly high antifriction and wearability, good weakening and machinability etc., and application is widely.Vermicular cast iron is development in recent years a kind of cast iron material rapidly.Graphite in vermicular cast iron shape under an optical microscope seems slabbing, but graphite flake is short and thick, and head is more blunt, relatively round, is similar to vermiform.Have both some advantages of casting pig and spheroidal graphite cast-iron, be used as glass mold, ingot mould, exhaustor, cylinder, automobile engine etc. widely.
In actual production is lived, mould is often caused shorten die life by multiple tests such as high-temperature oxydation, growth deformation, heat exhaustion, abrasions or lost efficacy, and common failure mode has: peeling, peeling, pit, crackle etc..Laser melting coating is also referred to as laser cladding or laser cladding.Experiment proves that adopting laser melting and coating technique repairing mould is practicable approach, the document of related application as: 1. application number be 201510076340.7 Chinese patent disclose a kind of laser cladding method preparing Co-based alloy coating on vermicular cast iron surface, Co-based alloy powder is layered on matrix surface by the method adopting preset powder feeding, then carrying out laser melting coating, making alloy powder and base material is metallurgical binding.Co-based alloy powder is elementary composition by C, Si, Cr, W, Co, content respectively C≤1%, Si≤0.8%, Cr≤30%, W≤12%, and surplus is Co.Coating hardness prepared by the method is higher, has good wearability and corrosion resistance under high temperature, and coat inside is without slag inclusion or bubble, and bond strength is high.2. application number is that the Chinese patent of 201510669072.X discloses a kind of spheroidal graphite cast-iron surface laser restorative procedure.Adopting the cladding area flawless defect that formed of the method, cladding layer and nodular cast iron substrate interface present discontinuous fusing trend, and interface be typical zigzag, and bond strength is high, it is to avoid interface cracks due to the generation of metamorphosis ledeburite continuously.3. white structure and the problem of Cracking for ironcasting laser melting coating in document " ironcasting laser melting coating NiCuFeBSi alloy structure and mechanical property " such as Dong Shiyun is studied, base material entirety is adopted different preheating temperatures, result shows to raise with preheating temperature, cladding layer interface white structure width increases, white structure presents dispersion, the distribution of interrupted shape, advantageously reduce interfacial brittle, it is suppressed that cladding layer tearing tendency.But simultaneously because the raising of preheating temperature, making cladding layer and interface cohesion district hardness decline, cladding layer dilution rate is big.The present invention adopts laser preheated substrate surface, and base material heat affecting is little, while improving crack defect, other performance impacts of cladding layer are less, at present, has no pertinent literature report.
Summary of the invention
It is an object of the invention to provide one to get togather with body junction, the method for fusion covered nickel base coating after a kind of vermicular cast iron die surface laser the pre-heat treatment of coating uniform densification, pore-free, crackle and field trash.
The technical scheme is that
A kind of method of deposited nickel-base alloy coating after vermicular cast iron die surface laser the pre-heat treatment, operating procedure is as follows:
1. step one: with line cutting vermicular cast iron matrix is cut into the sample of 45*35*10, and successively with 80,240,360,400 order sand paperings bright and clean → carry out that blasting treatment → totally → hair-dryer dries up sample with acetone, ultrasonic waves for cleaning → deionized water rinsing.
2. step 2: with the dry Co-based alloy powder of vacuum drier, drying temperature is 100 degree, and the time is 5 hours.The each component content of described Co-based alloy powder is as follows: < 6.0Wt%, surplus are Ni, and the granularity of Co-based alloy powder is-150～320 orders for C < 0.1Wt%, Si content 1.8～3.0Wt%, Cr < 1.0Wt%, B content 0.9～1.5Wt%, Fe.
3. step 3: carry out laser pre-treated with optical fiber laser, laser output power is 0W, 100W, 200W, 300W, 350W, and scanning speed is 2mm/s.
4. step 4: use optical fiber laser to carry out laser melting coating, laser output power is 600～1500W, spot size is 1.5～2.5mm, focal length is 18～22mm, powder feeding voltage is 8～15V, and carrier gas stream is 6L/min powder feeding gas is high-purity argon gas, and flow is 3～8L/min, scanning speed is 2～8mm/s, and overlapping rate is 20%.
The invention has the beneficial effects as follows:
1. first sample is carried out the pre-heat treatment with laser by the present invention, then synchronous powder feeding system laser melting coating is adopted to obtain ni base alloy coating, after pretreatment, the thermograde within cladding layer after laser melting coating can be reduced, reduce the generation of thermal stress, reduce the probability of cladding layer crack initiation to a certain extent.Simultaneously that other performance impacts such as hardness, dilution rate are less.
2. the method for warming up that the present invention adopts is laser pre-treated, and compared with traditional pretreatment, laser pre-treated simply heats at matrix surface, and the impact of base material is less.Additionally, better saved the energy, reduce production cost, improve efficiency.
3. the ni base alloy coating that the present invention obtains and matrix are metallurgical binding, and bond strength is high.
4. the Co-based alloy powder selected by the present invention, belongs to self-fluxing alloyed powder, has good wettability.
5. the method that the present invention adopts synchronous powder feeding system, it is possible to repeatedly pile up cladding layer, the cladding layer of preceding layer has been carried out heat treatment by piling up of later layer cladding layer, improves the performance such as hardness of cladding layer.Do not need to repeat fore-put powder, do not limited by cladding layer thickness, it is possible to pile up the cladding layer of any thickness, substantially increase efficiency.
Accompanying drawing explanation
Fig. 1 is the cross section crack defect shape appearance figure of the embodiment of the present invention 1.
The cladding layer Cross Section Morphology figure that Fig. 2 provides for the embodiment of the present invention 1.
Fig. 3 is the combination interface Elemental redistribution of the embodiment of the present invention 1.
The cladding layer Cross Section Morphology figure that Fig. 4 provides for the embodiment of the present invention 2.
Fig. 5 is the combination interface Elemental redistribution of the embodiment of the present invention 2.
Fig. 6 is the microhardness of the embodiment of the present invention 1,2.
Fig. 7 is the XRD figure picture of present example 2.
Detailed description of the invention
Below in conjunction with specific embodiment and accompanying drawing, the invention will be further described, but does not constitute the restriction to the claims in the present invention protection domain.
Embodiment 1
A kind of method of cladding Ni base alloy coat after vermicular cast iron die surface laser the pre-heat treatment, operating procedure is as follows:
1. step one: with line cutting vermicular cast iron matrix is cut into the sample of 45*35*10, and successively with 80,240,360,400 order sand paperings bright and clean → carry out that blasting treatment → totally → hair-dryer dries up sample with acetone, ultrasonic waves for cleaning → deionized water rinsing.
2. step 2: with the dry Co-based alloy powder of vacuum drier, drying temperature is 100 degree, and the time is 5 hours.The each component content of described Co-based alloy powder is as follows: < 6.0Wt%, surplus are Ni, and the granularity of Co-based alloy powder is-150～320 orders for C < 0.1Wt%, Si content 1.8～3.0Wt%, Cr < 1.0Wt%, B content 0.9～1.5Wt%, Fe.
3. step 3: without carrying out laser pre-treated, optical fiber laser is directly used to carry out laser melting coating, laser output power is 1200W, spot size is 2mm, and focal length is 20.9mm, and powder feeding voltage is 12V, powder feeding gas is high-purity argon gas, flow is 6L/min, and scanning speed is 4mm/s, and overlapping rate is 20%.
Embodiment 2
A kind of method of cladding Ni base alloy coat after vermicular cast iron die surface laser the pre-heat treatment, operating procedure is as follows:
1. step one: with the step one of example 1.
2. step 2: with the step 2 of example 1.
3. step 3: carry out laser pre-treated with optical fiber laser, laser output power is 350W, and scanning speed is 2mm/s.
4. step 4: using optical fiber laser to carry out laser melting coating, laser output power is 1200W, and spot size is 2mm, and focal length is 20.9mm, and powder feeding voltage is 12V, and powder feeding gas is high-purity argon gas, and flow is 6L/min, and scanning speed is 4mm/s, and overlapping rate is 20%.
Embodiment 3
A kind of method of cladding Ni base alloy coat after vermicular cast iron die surface laser the pre-heat treatment, operating procedure is as follows:
1. step one: with the step one of example 1.
2. step 2: with the step 2 of example 1.
3. step 3: carry out laser pre-treated with optical fiber laser, laser output power is 100W, and scanning speed is 2mm/s.
4. step 4: using optical fiber laser to carry out laser melting coating, laser output power is 600W, and spot size is 1.5mm, focal length is 18mm, and powder feeding voltage is 8V, and carrier gas stream is 6L/min powder feeding gas is high-purity argon gas, flow is 3L/min, and scanning speed is 2mm/s, and overlapping rate is 20%.
Embodiment 4
A kind of method of cladding Ni base alloy coat after vermicular cast iron die surface laser the pre-heat treatment, operating procedure is as follows:
1. step one: with the step one of example 1.
2. step 2: with the step 2 of example 1.
3. step 3: carry out laser pre-treated with optical fiber laser, laser output power is 300W, and scanning speed is 2mm/s.
4. step 4: using optical fiber laser to carry out laser melting coating, laser output power is 1500W, and spot size is 2.5mm, focal length is 22mm, and powder feeding voltage is 15V, and carrier gas stream is 6L/min powder feeding gas is high-purity argon gas, flow is 8L/min, and scanning speed is 8mm/s, and overlapping rate is 20%.
The present invention is embodied as
1. cladding layer embodiment 1 and embodiment 2 prepared, it is utilized respectively scanning electron microscope (SEM) and observes the Cross Section Morphology of coating, energy disperse spectroscopy (EDS) is utilized to analyze the Elemental redistribution of cladding layer, transition region, matrix, utilize X-ray diffraction analysis instrument (XRD) to detect the phase structure of coating, utilize Vickers to measure the hardness distribution of cladding layer.Measurement result is shown in Fig. 1～Fig. 7, and measurement result shows:
As shown in Figure 2, embodiment 1 does not have the cladding layer white structure of preheating along interface continuous distribution.
As shown in Figure 4, embodiment 2 then presents noncontinuity distribution (adulterate in white structure some matrix) through the 350W cladding layer white structure preheated, and advantageously reduces interfacial brittle, can reduce the trend of cladding layer cracking to a certain extent.
By Fig. 3 and Fig. 5 it can be seen that combination interface constituent content fluctuation comparatively significantly unit have Fe, Ni, Cr, in cladding process, Fe diffuses into cladding layer in a large number.Embodiment 1 does not have the cladding layer combination interface place element variation amplitude preheated bigger as shown in Figure 3, as shown in Figure 5, embodiment 2 changes slowly through each element in the cladding layer interface relatively example 1 that 350W preheats, amplitude of variation is less, Fe in preheated rear matrix diffuses into cladding layer, and the elements such as Ni, the Cr in cladding layer also spread in matrix, therefore combination interface element variation amplitude is less, can increase dilution rate to a certain extent.Matrix Fe in Fig. 5, C element changes greatly is that inswept graphite grain structure during analysis swept by line.
As seen from Figure 6, after preheating, cladding layer is internal slightly to decline with interface cohesion district hardness, and heat affected area hardness slightly raises, but intensity of variation is all not as big, it is known that while laser preheated substrate surface modification crack defect, the impact of cladding layer hardness is less.
As shown in Figure 7, cladding layer is mainly by γ-(Ni, Fe), FeNi, α-Fe, Fe3C, Cr23C6 phase composition.
Claims (1)
1. the method for deposited nickel-base alloy coating after a vermicular cast iron die surface laser the pre-heat treatment, it is characterised in that operating procedure is as follows:
(1) step one: with line cutting vermicular cast iron matrix is cut into the sample of 45*35*10, and successively with 80,240,360,400 order sand paperings bright and clean → carry out that blasting treatment → totally → hair-dryer dries up sample with acetone, ultrasonic waves for cleaning → deionized water rinsing；
(2) step 2: with the dry Co-based alloy powder of vacuum drier, drying temperature is 100 degree, and the time is 5 hours；The each component content of described Co-based alloy powder is as follows: < 6.0Wt%, surplus are Ni, and the granularity of Co-based alloy powder is-150～320 orders for C < 0.1Wt%, Si content 1.8～3.0Wt%, Cr < 1.0Wt%, B content 0.9～1.5Wt%, Fe；
(3) step 3: carry out laser pre-treated with optical fiber laser, laser output power is 0～350W, and scanning speed is 2mm/s；
(4) step 4: use optical fiber laser to carry out laser melting coating, laser output power is 600～1500W, spot size is 1.5～2.5mm, focal length is 18～22mm, powder feeding voltage is 8～15V, and carrier gas stream is 6L/min powder feeding gas is high-purity argon gas, and flow is 3～8L/min, scanning speed is 2-8mm/s, and overlapping rate is 20%.
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Cited By (15)
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|---|---|---|---|---|
| CN107043933A (en) * | 2017-04-14 | 2017-08-15 | 广西大学 | A kind of method for preparing zero defect cladding layer in Cast Iron Surface |
| CN107419264A (en) * | 2017-08-10 | 2017-12-01 | 袁晓明 | A kind of tire-mold antifriction plate and its manufacturing process |
| CN108070854A (en) * | 2017-12-12 | 2018-05-25 | 沈阳农业大学 | A kind of agricultural soil-engaging component plasma melting coating process easy to wear |
| CN108265168A (en) * | 2018-01-25 | 2018-07-10 | 长春理工大学 | A kind of vermicular cast iron surface laser consolidation method |
| CN109023351A (en) * | 2018-09-12 | 2018-12-18 | 中国人民解放军陆军装甲兵学院 | A kind of preparation method of flawless laser melting coating amorphous coating |
| CN109385631A (en) * | 2018-12-10 | 2019-02-26 | 山东泰利先进制造研究院有限公司 | A kind of laser melting coating complex repairation manufacturing method and its application |
| CN112593230A (en) * | 2020-12-21 | 2021-04-02 | 福建丰力机械科技有限公司 | Laser repairing method for surface of nodular cast iron |
| CN113755833A (en) * | 2021-07-01 | 2021-12-07 | 江苏智远激光装备科技有限公司 | Laser cladding nickel-based alloy powder process for copper alloy primary mold glass mold |
| CN113840932A (en) * | 2019-05-23 | 2021-12-24 | 东洋制罐集团控股株式会社 | Ni-based self-fluxing alloy, glass-producing member using Ni-based self-fluxing alloy, mold using glass-producing member, and glass block-conveying member |
| CN113909736A (en) * | 2021-09-28 | 2022-01-11 | 杭州华光焊接新材料股份有限公司 | Nickel-based alloy welding powder and manufacturing method and using method thereof |
| CN114082962A (en) * | 2021-11-22 | 2022-02-25 | 国铭铸管股份有限公司 | Online repairing and annealing process for nodular cast pipe |
| CN115161632A (en) * | 2022-07-11 | 2022-10-11 | 山东雷石智能制造股份有限公司 | Laser cladding modification method for cast iron engine cylinder cover and valve stem grinding surface |
| CN115369398A (en) * | 2021-12-22 | 2022-11-22 | 杭州航林机械制造有限公司 | Laser cladding process for gray iron casting and composite powder used by laser cladding process |
| CN116083914A (en) * | 2021-12-29 | 2023-05-09 | 苏州东海玻璃模具有限公司 | Method for laser cladding of self-fluxing nickel-based alloy powder on copper alloy glass die |
| CN116200628A (en) * | 2022-11-11 | 2023-06-02 | 天津辉锐激光科技有限公司 | Ductile iron corrosion-resistant alloy layer and preparation method thereof |
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| CN107043933A (en) * | 2017-04-14 | 2017-08-15 | 广西大学 | A kind of method for preparing zero defect cladding layer in Cast Iron Surface |
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| CN108265168A (en) * | 2018-01-25 | 2018-07-10 | 长春理工大学 | A kind of vermicular cast iron surface laser consolidation method |
| CN109023351A (en) * | 2018-09-12 | 2018-12-18 | 中国人民解放军陆军装甲兵学院 | A kind of preparation method of flawless laser melting coating amorphous coating |
| CN109385631A (en) * | 2018-12-10 | 2019-02-26 | 山东泰利先进制造研究院有限公司 | A kind of laser melting coating complex repairation manufacturing method and its application |
| CN113840932A (en) * | 2019-05-23 | 2021-12-24 | 东洋制罐集团控股株式会社 | Ni-based self-fluxing alloy, glass-producing member using Ni-based self-fluxing alloy, mold using glass-producing member, and glass block-conveying member |
| US11643708B2 (en) | 2019-05-23 | 2023-05-09 | Toyo Seikan Group Holdings, Ltd. | Nickel-based self-fluxing alloy, glass manufacturing member using the nickel-based self-fluxing alloy, as well as mold and glass gob transporting member each using the glass manufacturing member |
| CN112593230A (en) * | 2020-12-21 | 2021-04-02 | 福建丰力机械科技有限公司 | Laser repairing method for surface of nodular cast iron |
| CN113755833A (en) * | 2021-07-01 | 2021-12-07 | 江苏智远激光装备科技有限公司 | Laser cladding nickel-based alloy powder process for copper alloy primary mold glass mold |
| CN113909736A (en) * | 2021-09-28 | 2022-01-11 | 杭州华光焊接新材料股份有限公司 | Nickel-based alloy welding powder and manufacturing method and using method thereof |
| CN114082962A (en) * | 2021-11-22 | 2022-02-25 | 国铭铸管股份有限公司 | Online repairing and annealing process for nodular cast pipe |
| CN114082962B (en) * | 2021-11-22 | 2023-12-19 | 国铭铸管股份有限公司 | Online repairing and annealing process for spheroidal graphite cast tube |
| CN115369398A (en) * | 2021-12-22 | 2022-11-22 | 杭州航林机械制造有限公司 | Laser cladding process for gray iron casting and composite powder used by laser cladding process |
| CN116083914A (en) * | 2021-12-29 | 2023-05-09 | 苏州东海玻璃模具有限公司 | Method for laser cladding of self-fluxing nickel-based alloy powder on copper alloy glass die |
| CN115161632A (en) * | 2022-07-11 | 2022-10-11 | 山东雷石智能制造股份有限公司 | Laser cladding modification method for cast iron engine cylinder cover and valve stem grinding surface |
| CN116200628A (en) * | 2022-11-11 | 2023-06-02 | 天津辉锐激光科技有限公司 | Ductile iron corrosion-resistant alloy layer and preparation method thereof |
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