CN110330987B - Laser alloying coke dry quenching lining plate and preparation method thereof - Google Patents
Laser alloying coke dry quenching lining plate and preparation method thereof Download PDFInfo
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- CN110330987B CN110330987B CN201910653593.4A CN201910653593A CN110330987B CN 110330987 B CN110330987 B CN 110330987B CN 201910653593 A CN201910653593 A CN 201910653593A CN 110330987 B CN110330987 B CN 110330987B
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- 238000005275 alloying Methods 0.000 title claims abstract description 126
- 238000010791 quenching Methods 0.000 title claims abstract description 55
- 230000000171 quenching effect Effects 0.000 title claims abstract description 55
- 239000000571 coke Substances 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 90
- 239000000758 substrate Substances 0.000 claims abstract description 23
- 238000004140 cleaning Methods 0.000 claims abstract description 17
- 238000003892 spreading Methods 0.000 claims abstract description 13
- 230000007480 spreading Effects 0.000 claims abstract description 13
- 239000011248 coating agent Substances 0.000 claims abstract description 12
- 238000000576 coating method Methods 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 12
- 238000005507 spraying Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000007689 inspection Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 4
- 238000009659 non-destructive testing Methods 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 description 13
- 239000000956 alloy Substances 0.000 description 13
- 230000007547 defect Effects 0.000 description 12
- 238000005266 casting Methods 0.000 description 10
- 238000001514 detection method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000002679 ablation Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- -1 oxide skin Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B39/00—Cooling or quenching coke
- C10B39/02—Dry cooling outside the oven
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/30—Ferrous alloys, e.g. steel alloys containing chromium with cobalt
-
- 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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- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Coating By Spraying Or Casting (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention relates to a laser alloying dry quenching lining plate and a preparation method thereof, wherein the preparation method comprises the following steps: (1) cleaning the working surface of the cast substrate lining plate; (2) coating the inside of each counter bore on the working surface of the substrate lining plate with the well-mixed quick-drying powder, and airing; (3) formulating an alloying powder comprising: c: 1.45-1.65 wt.%, Si: 0.15-0.4 wt.%, Cr: 3.75-5.0 wt.%, W: 11.75-13 wt.%, Co: 4.75-5.25 wt.% and the balance Fe; (4) uniformly spraying the prepared alloying powder on the working surface of the substrate lining plate by an electrostatic powder sprayer in a preset powder spreading mode; (5) and carrying out laser alloying on the working surface of the substrate lining plate to obtain the laser alloying coke dry quenching lining plate. The laser alloying dry quenching lining plate prepared by the method can obviously improve the working surface hardness, the wear resistance and the burning loss resistance of the lining plate, obviously improve the service life of the lining plate and reduce the enterprise cost.
Description
Technical Field
The invention relates to the technical field of metal surface treatment, in particular to a laser alloying coke dry quenching lining plate and a preparation method thereof.
Background
The dry quenching (CDQ) is an energy-saving production process widely applied to metallurgy and coking enterprises at home and abroad at present, red coke is extinguished through inert gas to prepare coke, and simultaneously the sensible heat of the red coke is effectively recovered and utilized to generate electricity, so that the dry quenching coke has the advantages of energy conservation, environmental protection and the like. In the production of dry quenching coke, a coke tank is used as one of main devices, periodically receives red coke pushed out from a coke oven, runs to the top of a quenching tower, discharges the red coke into the quenching tower, and repeats the cycle. The coke tank lining plate frequently bears ablation, oxidation, corrosion, impact and scouring abrasion of red coke at about 1050 ℃, the working environment is severe, and the requirement is high. At present, cast heat-resistant alloy steel (ZG35Cr24Ni7SiN) lining plates widely used are poor in abrasion resistance and ablation resistance, short in service life and low in reliability, and particularly, the bottom of a coke tank and a conical section cast alloy lining plate are prone to burning loss, and production accidents can be caused when the damaged lining plate falls into a coke quenching tower. The traditional heat-resistant cast alloy lining plate is frequently replaced in use, has high cost and high labor intensity of replacement, influences the normal operation of coke dry quenching production, and is one of bottlenecks which restrict cost reduction of enterprises.
Disclosure of Invention
The invention aims to provide a laser alloying coke dry quenching lining plate which has simple process and low cost and can obviously improve the wear resistance, burning loss resistance and service life of the coke dry quenching lining plate and a preparation method thereof, thereby prolonging the service life of a coke dry quenching tank, ensuring continuous production, reducing the replacement times of the lining plate and reducing the enterprise cost. In order to achieve the above object, the present invention provides the following technical solutions:
a preparation method of a laser alloying dry quenching lining plate comprises the following steps:
(1) cleaning the working surface of the cast substrate lining plate;
(2) coating the inside of each counter bore on the working surface of the substrate lining plate with the well-mixed quick-drying powder, and airing;
(3) formulating an alloying powder comprising: c: 1.45-1.65 wt.%, Si: 0.15-0.4 wt.%, Cr: 3.75-5.0 wt.%, W: 11.75-13 wt.%, Co: 4.75-5.25 wt.% and the balance Fe;
(4) uniformly spraying the prepared alloying powder on the working surface of the substrate lining plate by an electrostatic powder sprayer in a preset powder spreading mode;
(5) and carrying out laser alloying on the working surface of the substrate lining plate to obtain the laser alloying coke dry quenching lining plate.
According to the preparation method of the laser alloying dry quenching lining plate, under the action of a high-energy-density laser beam output by a laser, the alloy powder and the metal on the surface of the substrate lining plate are subjected to rapid metallurgical reaction, and under the rapid cooling action of the substrate metal of the surrounding normal-temperature lining plate, an alloying layer with fine grains and compact structure is obtained, the hardness of the alloying layer reaches above HRC63, and the alloying layer has no cracks, air holes and inclusion defects, so that the alloying layer on the working surface of the dry quenching lining plate is prepared; meanwhile, the method can prepare a burning loss resistant and high wear resistant alloying layer on the working surface of the substrate lining plate, and simultaneously completes the laser quenching treatment process on the casting base metal below the alloying layer, wherein the quenching structure of the laser quenching treatment process starts from the alloy layer until the part which is 1.5mm deep into the lining plate base body, the hardness of the laser quenching layer shows gradient change, the hardness of the laser quenching layer is changed from HRC55 to HRC45 from the lower boundary of the laser alloy layer, a heat affected zone is arranged below the quenching layer, the hardness is generally about HRC35-40, the heat affected zone is generally within 0.5mm of the depth from the lower part of the quenching layer to the inner part of the base body, and then the ZG35Cr24Ni7SiN substrate with the hardness of HRC28-32 is arranged. By the method, the anti-burning loss and high-hardness alloying layer is prepared on the surface of the substrate lining plate, then the quenching layer with higher hardness is formed, then the heat affected zone with medium hardness is formed until the substrate, and the wear-resistant layer on the working surface of the lining plate with gradient change is formed, so that the impact resistance and wear resistance of the lining plate are improved, the burning loss resistance of the dry quenching lining plate is improved, and the service life is obviously prolonged.
The laser processing adopted by the invention belongs to a green manufacturing technology, and the method has the remarkable advantages of energy conservation and environmental protection.
Preferably, the substrate liner plate is a ZG35Cr24Ni7SiN liner plate.
The alloying powder of the invention fully considers the wettability and compatibility with ZG35Cr24Ni7SiN material, and avoids the occurrence of cracks in the alloying process.
Preferably, the grain size of the alloying powder is 135-325 meshes.
Preferably, the laser alloying laser scanning power is 3800-4000W, and the scanning speed is 1000-1200 mm/min.
Preferably, the laser alloying lap joint rate is 20-30%.
Preferably, the laser alloyed laser spot has a size of 2 x 14 mm.
Preferably, the thickness of the preset powder layer is 0.5-0.7 mm.
Preferably, the thickness of the laser alloying layer is 0.3-0.5 mm.
Preferably, the preparation method further comprises: and carrying out nondestructive testing on the laser alloying layer by surface dye inspection after laser alloying.
Meanwhile, the invention also provides a laser alloying dry quenching lining plate which is prepared by the preparation method.
Drawings
FIG. 1 is a topographical view of metallurgical bonding of a laser alloying layer of the laser alloying dry quenching lining board and the surface metal of a substrate lining board.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the following embodiments. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
A preparation method of a laser alloying dry quenching lining plate comprises the following steps:
(1) cleaning the working surface of the cast substrate lining plate;
(2) coating the inside of each counter bore on the working surface of the substrate lining plate with the well-mixed quick-drying powder, and airing;
(3) formulating an alloying powder comprising: c: 1.45-1.65 wt.%, Si: 0.15-0.4 wt.%, Cr: 3.75-5.0 wt.%, W: 11.75-13 wt.%, Co: 4.75-5.25 wt.% and the balance Fe;
(4) uniformly spraying the prepared alloying powder on the working surface of the substrate lining plate by an electrostatic powder sprayer in a preset powder spreading mode;
(5) and carrying out laser alloying on the working surface of the substrate lining plate to obtain the laser alloying coke dry quenching lining plate.
In the invention, the cleaning agent used for cleaning is preferably industrial alcohol, and the cleaning mode well known to those skilled in the art can be adopted without special requirements on the cleaning embodiment of the invention. The cleaning treatment of the invention can remove impurities such as oxide skin, oil stain and the like on the working surface of the lining plate.
The invention has no special requirement on the base material of the dry quenching lining plate, and ZG35Cr24Ni7SiN which is well known by the technical personnel in the field and is used in the production on a large scale can be used.
After cleaning, before the laser alloying, the inside of each counter bore on the working surface of the lining plate is coated with good quick dry powder and dried, so that the counter bores are not damaged during the laser alloying. The counter sink holes are used for fixing the coke dry quenching lining plate on the coke dry quenching tank body, and have higher requirement on dimensional accuracy.
In the present invention, the grain size of the alloying powder is preferably 135 to 325 mesh. The invention controls the components of the alloying powder in the range, fully considers the wettability and the compatibility with the ZG35Cr24Ni7SiN casting base material, and avoids the occurrence of defects such as cracks and the like in the alloying process.
In the invention, preferably, the laser alloying laser scanning power is 3800-4000W, the scanning speed is 1000-1200 mm/min, the laser alloying overlap ratio is 20-30%, the laser alloying laser spot size is 2 x 14mm, the alloying powder is uniformly sprayed on the working surface of the lining plate by an electrostatic powder sprayer in a preset powder spreading mode, the thickness of a preset powder layer is 0.5-0.7 mm, the thickness of a laser alloying layer is 0.3-0.5 mm, the laser alloying layer is subjected to nondestructive testing, and the surface dye check is carried out to detect whether defects such as cracks exist.
The present invention will be described in detail with reference to the following examples:
example 1
Formulating an alloy powder comprising: c: 1.65wt.%, Si: 0.4wt.%, Cr: 5.0wt.%, W: 13wt.%, Co: 5.25wt.% of Fe and the balance of Fe, wherein the grain diameter of the alloying powder is 135-325 meshes; casting the ZG35Cr24Ni7SiN lining plate according to a drawing; cleaning the working surface of the cast lining plate; coating the inside of each counter bore on the working surface of the lining plate with the well-mixed quick-drying powder, and airing; uniformly spraying alloying powder on the working surface of the lining plate by an electrostatic powder sprayer in a preset powder spreading mode, wherein the thickness of a preset powder layer is 0.5 mm; carrying out laser alloying, wherein the size of a laser spot is 2 multiplied by 14mm, the laser scanning power is 3800W, the scanning speed is 1000mm/min, the lap joint rate is 20%, and the thickness of an obtained laser alloying layer is 0.3 mm; and carrying out nondestructive detection on the laser alloying layer through surface dye inspection to detect whether defects such as cracks exist.
In the dry quenching lining plate prepared by laser alloying in the embodiment, the hardness of the alloying layer reaches HRC 63.
Example 2
Formulating an alloy powder comprising: c: 1.45 wt.%, Si: 0.15 wt.%, Cr: 3.75 wt.%, W: 11.75 wt.%, Co: 4.75 wt.% of Fe and the balance of Fe, wherein the grain size of the alloying powder is 135-325 meshes; casting the ZG35Cr24Ni7SiN lining plate according to a drawing; cleaning the working surface of the cast lining plate; coating the inside of each counter bore on the working surface of the lining plate with the well-mixed quick-drying powder, and airing; uniformly spraying alloying powder on the working surface of the lining plate by an electrostatic powder sprayer in a preset powder spreading mode, wherein the thickness of a preset powder layer is 0.7 mm; carrying out laser alloying, wherein the size of a laser spot is 2 multiplied by 14mm, the laser scanning power is 4000W, the scanning speed is 1200mm/min, the lap joint rate is 30 percent, and the thickness of an obtained laser alloying layer is 0.5 mm; and carrying out nondestructive detection on the laser alloying layer through surface dye inspection to detect whether defects such as cracks exist.
In the dry quenching lining plate prepared by laser alloying in the embodiment, the hardness of the alloying layer reaches HRC 64.
Example 3
Formulating an alloy powder comprising: c: 1.55 wt.%, Si: 0.25 wt.%, Cr: 3.75 wt.%, W: 11.75 wt.%, Co: 4.75 wt.% of Fe and the balance of Fe, wherein the grain size of the alloying powder is 135-325 meshes; casting the ZG35Cr24Ni7SiN lining plate according to a drawing; cleaning the working surface of the cast lining plate; coating the inside of each counter bore on the working surface of the lining plate with the well-mixed quick-drying powder, and airing; uniformly spraying alloying powder on the working surface of the lining plate by an electrostatic powder sprayer in a preset powder spreading mode, wherein the thickness of a preset powder layer is 0.5 mm; carrying out laser alloying, wherein the size of a laser spot is 2 multiplied by 14mm, the laser scanning power is 3800W, the scanning speed is 1000mm/min, the lap joint rate is 20%, and the thickness of an obtained laser alloying layer is 0.3 mm; and carrying out nondestructive detection on the laser alloying layer through surface dye inspection to detect whether defects such as cracks exist.
In the dry quenching lining plate prepared by laser alloying in the embodiment, the hardness of the alloying layer reaches HRC 63.
Example 4
Formulating an alloy powder comprising: c: 1.65wt.%, Si: 0.35 wt.%, Cr: 4.75 wt.%, W: 12.7 wt.%, Co: 4.85 wt.% of Fe and the balance of Fe, wherein the grain diameter of the alloying powder is 135-325 meshes; casting the ZG35Cr24Ni7SiN lining plate according to a drawing; cleaning the working surface of the cast lining plate; coating the inside of each counter bore on the working surface of the lining plate with the well-mixed quick-drying powder, and airing; uniformly spraying alloying powder on the working surface of the lining plate by an electrostatic powder sprayer in a preset powder spreading mode, wherein the thickness of a preset powder layer is 0.5 mm; carrying out laser alloying, wherein the size of a laser spot is 2 multiplied by 14mm, the laser scanning power is 3900W, the scanning speed is 1100mm/min, the lap joint rate is 20%, and the thickness of an obtained laser alloying layer is 0.3 mm; and carrying out nondestructive detection on the laser alloying layer through surface dye inspection to detect whether defects such as cracks exist.
In the dry quenching lining plate prepared by laser alloying in the embodiment, the hardness of the alloying layer reaches HRC 63.
Example 5
Formulating an alloy powder comprising: c: 1.45 wt.%, Si: 0.25 wt.%, Cr: 5.0wt.%, W: 11.75 wt.%, Co: 5.15 wt.% of Fe and the balance of Fe, wherein the grain diameter of the alloying powder is 135-325 meshes; casting the ZG35Cr24Ni7SiN lining plate according to a drawing; cleaning the working surface of the cast lining plate; coating the inside of each counter bore on the working surface of the lining plate with the well-mixed quick-drying powder, and airing; uniformly spraying alloying powder on the working surface of the lining plate by an electrostatic powder sprayer in a preset powder spreading mode, wherein the thickness of a preset powder layer is 0.6 mm; carrying out laser alloying, wherein the size of a laser spot is 2 multiplied by 14mm, the laser scanning power is 3900W, the scanning speed is 1100mm/min, the lap joint rate is 30%, and the thickness of an obtained laser alloying layer is 0.4 mm; and carrying out nondestructive detection on the laser alloying layer through surface dye inspection to detect whether defects such as cracks exist.
In the dry quenching lining plate prepared by laser alloying in the embodiment, the hardness of the alloying layer reaches HRC 63.
Example 6
Formulating an alloy powder comprising: c: 1.65wt.%, Si: 0.15 wt.%, Cr: 3.75 wt.%, W: 11.75 wt.%, Co: 5.15 wt.% of Fe and the balance of Fe, wherein the grain diameter of the alloying powder is 135-325 meshes; casting the ZG35Cr24Ni7SiN lining plate according to a drawing; cleaning the working surface of the cast lining plate; coating the inside of each counter bore on the working surface of the lining plate with the well-mixed quick-drying powder, and airing; uniformly spraying alloying powder on the working surface of the lining plate by an electrostatic powder sprayer in a preset powder spreading mode, wherein the thickness of a preset powder layer is 0.7 mm; carrying out laser alloying, wherein the size of a laser spot is 2 multiplied by 14mm, the laser scanning power is 4000W, the scanning speed is 1200mm/min, the lap joint rate is 20%, and the thickness of an obtained laser alloying layer is 0.5 mm; and carrying out nondestructive detection on the laser alloying layer through surface dye inspection to detect whether defects such as cracks exist.
In the dry quenching lining plate prepared by laser alloying in the embodiment, the hardness of the alloying layer reaches HRC 63.
Example 7
Formulating an alloy powder comprising: c: 1.55 wt.%, Si: 0.18 wt.%, Cr: 3.75 wt.%, W: 11.75 wt.%, Co: 4.75 wt.% of Fe and the balance of Fe, wherein the grain size of the alloying powder is 135-325 meshes; casting the ZG35Cr24Ni7SiN lining plate according to a drawing; cleaning the working surface of the cast lining plate; coating the inside of each counter bore on the working surface of the lining plate with the well-mixed quick-drying powder, and airing; uniformly spraying alloying powder on the working surface of the lining plate by an electrostatic powder sprayer in a preset powder spreading mode, wherein the thickness of a preset powder layer is 0.5 mm; carrying out laser alloying, wherein the size of a laser spot is 2 multiplied by 14mm, the laser scanning power is 3800W, the scanning speed is 1000mm/min, the lap joint rate is 20%, and the thickness of an obtained laser alloying layer is 0.3 mm; and carrying out nondestructive detection on the laser alloying layer through surface dye inspection to detect whether defects such as cracks exist.
In the dry quenching lining plate prepared by laser alloying in the embodiment, the hardness of the alloying layer reaches HRC 64.
Example 8
Formulating an alloy powder comprising: c: 1.65wt.%, Si: 0.35 wt.%, Cr: 3.75 wt.%, W: 11.8 wt.%, Co: 4.75 wt.% of Fe and the balance of Fe, wherein the grain size of the alloying powder is 135-325 meshes; casting the ZG35Cr24Ni7SiN lining plate according to a drawing; cleaning the working surface of the cast lining plate; coating the inside of each counter bore on the working surface of the lining plate with the well-mixed quick-drying powder, and airing; uniformly spraying alloying powder on the working surface of the lining plate by an electrostatic powder sprayer in a preset powder spreading mode, wherein the thickness of a preset powder layer is 0.6 mm; carrying out laser alloying, wherein the size of a laser spot is 2 multiplied by 14mm, the laser scanning power is 4000W, the scanning speed is 1200mm/min, the lap joint rate is 30 percent, and the thickness of an obtained laser alloying layer is 0.4 mm; and carrying out nondestructive detection on the laser alloying layer through surface dye inspection to detect whether defects such as cracks exist.
In the dry quenching lining plate prepared by laser alloying in the embodiment, the hardness of the alloying layer reaches HRC 63.
After the laser alloying preparation, the surface of the coke dry quenching lining plate has no cracking, the obtained alloying layer has high surface quality, and no defects such as air holes, sand holes, cracks and the like exist, the obtained alloying lining plate has good hardness and wear resistance, especially has excellent burning loss resistance, the service life is prolonged by more than 2 times compared with that of the traditional ZG35Cr24Ni7SiN lining plate, and the service life of the coke pot is obviously prolonged.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A preparation method of a laser alloying dry quenching lining plate is characterized by comprising the following steps:
(1) cleaning the working surface of the cast ZG35Cr24Ni7SiN base material lining plate;
(2) coating the inside of each counter bore on the working surface of the substrate lining plate with the well-mixed quick-drying powder, and airing;
(3) formulating an alloying powder comprising: c: 1.45-1.65 wt.%, Si: 0.15-0.4 wt.%, Cr: 3.75-5.0 wt.%, W: 11.75-13 wt.%, Co: 4.75-5.25 wt.% and the balance Fe;
(4) uniformly spraying the prepared alloying powder on the working surface of the substrate lining plate by an electrostatic powder sprayer in a preset powder spreading mode;
(5) and carrying out laser alloying on the working surface of the substrate lining plate to obtain the laser alloying coke dry quenching lining plate.
2. The preparation method of the laser alloying dry quenching lining plate as claimed in claim 1, wherein the grain size of the alloying powder is 135-325 mesh.
3. The preparation method of the laser alloying dry quenching lining plate as claimed in claim 1, wherein the laser scanning power of the laser alloying is 3800-4000W, and the scanning speed is 1000-1200 mm/min.
4. The method for preparing the laser alloying dry quenching lining plate according to claim 1, wherein the laser alloying lap ratio is 20-30%.
5. The method of making a laser alloyed dry quenching liner plate according to claim 1, wherein the size of the laser alloyed laser spot is 2 x 14 mm.
6. The preparation method of the laser alloying dry quenching lining plate as claimed in claim 1, wherein the thickness of the powder layer of the pre-laid powder is 0.5-0.7 mm.
7. The method for preparing the laser alloying dry quenching lining plate according to claim 1, wherein the thickness of the laser alloying is 0.3-0.5 mm.
8. The method of making a laser alloyed dry quenching liner plate as claimed in claim 1, wherein the method of making further comprises: and carrying out nondestructive testing on the laser alloying layer by surface dye inspection after laser alloying.
9. A laser alloying dry quenching lining plate, which is characterized by being prepared by the preparation method of any one of claims 1 to 8.
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| CN201910653593.4A CN110330987B (en) | 2019-07-19 | 2019-07-19 | Laser alloying coke dry quenching lining plate and preparation method thereof |
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| CN201910653593.4A CN110330987B (en) | 2019-07-19 | 2019-07-19 | Laser alloying coke dry quenching lining plate and preparation method thereof |
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| CN110330987A CN110330987A (en) | 2019-10-15 |
| CN110330987B true CN110330987B (en) | 2020-10-02 |
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| CN102212820A (en) * | 2011-05-25 | 2011-10-12 | 石家庄华鼎高科强化合金设备制造有限公司 | High-temperature-wear-resistant lining plate for coke pot for coke dry quenching and preparation method thereof |
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| DE112015005736T5 (en) * | 2014-12-23 | 2017-09-28 | Magna International Inc. | Method for local laser beam coating |
| CN105506616B (en) * | 2015-12-14 | 2017-05-10 | 西安文理学院 | Laser cladding nickel base alloy powder for repairing damaged blower vane and repair method |
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