CN108620761A - A method of improving water heater porcelain enamel steel liner welding point yield deformation drag - Google Patents
A method of improving water heater porcelain enamel steel liner welding point yield deformation drag Download PDFInfo
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- CN108620761A CN108620761A CN201710152827.8A CN201710152827A CN108620761A CN 108620761 A CN108620761 A CN 108620761A CN 201710152827 A CN201710152827 A CN 201710152827A CN 108620761 A CN108620761 A CN 108620761A
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- water heater
- heater liner
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- porcelain enamel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
- B23K33/004—Filling of continuous seams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/12—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to investigating the properties, e.g. the weldability, of materials
- B23K31/125—Weld quality monitoring
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- Quality & Reliability (AREA)
- Heat Treatment Of Articles (AREA)
- Arc Welding In General (AREA)
Abstract
The present invention relates to a kind of method improving water heater porcelain enamel steel liner welding point yield deformation drag, the technical issues of surface oxidation decarburization, yield deformation drag are low existing for existing water heater porcelain enamel steel liner welding point, welding point is easy cracking leak is mainly solved.A kind of method improving water heater porcelain enamel steel liner welding point yield deformation drag of the present invention, including：1) water heater liner blank is prepared；2) degreasing and activation process are carried out to water heater liner blank surface successively；3) frit for porcelain enamel is coated with to water heater liner blank surface with wet coating；4) enamel firing processing is carried out to water heater liner blank.The method of the present invention can improve water heater porcelain enamel steel liner welding point and obtain yield deformation drag 5~15%；The method of the present invention manipulation is easy, and implementation cost is low.
Description
Technical field
The present invention relates to a kind of method of steel plate face of weld processing, more particularly to a kind of raising water heater porcelain enamel steel liners
The method of welding point yield deformation drag belongs to steel material welding processing technical field.
Background technology
Water heater liner generally uses enamel steel substrate, such as pickled hot steel plate or cold-rolled steel sheet, carries out welding, inner surface
Enamel firing is made after the application of slip.In water heater liner manufacturing process, enamel steel substrate undergoes the works such as welding, 750~850 DEG C of high temperature enamel firings
Sequence, the water heater liner inner surface application of slip, outer surface are naked state, the outer surface oxidation and decarbonization after high temperature enamel firing, weldering
The weak link of connector is more prominent.
Welding point is the weak link of water heater liner, and many water heater liner leaks mostly occur in weld region
Domain, the main reason is that intensity locally occurs in welding point, yield deformation drag declines, fatigue life reduces.Improve water heater
Liner welding point fatigue life, the method for reducing fatigue cracking are presently mainly to increase steel plate thickness, improve welding method
For main means.Increase welding steel thickness and necessarily improve liner weight, production cost, and applies more advanced welding method
It needs more to put into.
The Chinese patent application of application publication number CN102679554A discloses " a kind of inner container of electric water heater of list weld seam ",
By reducing the manufacturing method of water heater liner splicing welding joint, the bearing capacity of water heater liner is improved, water heater liner is avoided
The defect of leak, deformation is susceptible to due to weld seam.
The Chinese patent application of application publication number CN102649221A discloses a kind of " producer of inner container of electric water heater
Method " is manufactured using this method, no-welding-seam intersect, enamel layer uniform ground, prevent in the prior art weld seam leaked by aqueous corrosion
Water extends service life.
Lack the local strength for water heater porcelain enamel steel liner welding point in the prior art, yield deformation drag declines
The effective workaround of problem.
Invention content
The object of the present invention is to provide it is a kind of improve water heater porcelain enamel steel liner welding point yield deformation drag method,
Mainly solve that surface oxidation decarburization existing for existing water heater porcelain enamel steel liner welding point, yield deformation drag is low, connects
Head is easy the technical issues of cracking leak.
The technical scheme is that：A kind of side for improving water heater porcelain enamel steel liner welding point yield deformation drag
Method includes the following steps：
1) water heater liner blank is prepared, water heater liner enamel steel substrate is cut by the size of water heater liner, it will
The water heater liner cut carries out splicing group pair and welding with enamel steel substrate successively, and water heater liner blank is made；
2) degreasing and activation process are carried out to water heater liner blank surface successively, water heater liner blank is first placed in dress
In the container for having degreasing agent solution, impregnates water heater liner blank 20~50 seconds with degreasing agent solution, remove water heater liner
The grease on surface；Then the water heater liner blank after degreasing is placed in the container equipped with weak acid solution, is soaked with weak acid solution
Steep water heater liner blank 20~50 seconds；Water heater liner blank is taken out from weak acid solution, it will be in water heater with deionized water
Courage blank surface rinsed clean purges water heater liner blank surface 2~5 seconds with 80~100 DEG C of hot-airs, it is ensured that drying
Water heater liner blank prevents water heater liner blank surface from rusty stain occur；
3) frit for porcelain enamel is coated with to water heater liner blank surface with wet coating, with deionized water by frit for porcelain enamel dry powder tune
Gluey frit for porcelain enamel is made, the quality proportioning of frit for porcelain enamel dry powder and deionized water is 200 in gluey frit for porcelain enamel：30~200：
20；All base material surface smear glue frit for porcelain enamel of back of weld and the same side to the water heater liner blank after drying,
The thickness of the vitreous enamel bed of material is 0.1~0.8mm；It is fused to the weld seam of the water heater liner blank after drying front and away from weld seam
The thickness of base material surface smear glue frit for porcelain enamel in the 5~50mm width ranges of line both sides, the vitreous enamel bed of material is 0.3~1mm；
4) enamel firing processing is carried out to water heater liner blank, first will be coated with frit for porcelain enamel with 5~10 DEG C/min heating speeds
Water heater liner blank be slowly heated to 100~150 DEG C from 15~25 DEG C, it is ensured that drying water heater liner blank；Then it uses
Water heater liner blank is heated to 300~350 DEG C by 10~20 DEG C/min heating speeds from 100~150 DEG C；With 50~100 DEG C/
Water heater liner blank is heated to 750~850 DEG C by min heating speeds from 300~350 DEG C, at 750~850 DEG C to water heater
3~5min of liner blank high temperature enamel firing generates enamel layer；It will be in the water heater after enamel firing with 50~100 DEG C/min cooling velocities
Courage is cooled to 300~350 DEG C from 750~850 DEG C；With 5~20 DEG C/min cooling velocities by the water heater liner after enamel firing from
300~350 DEG C slowly cool to 15~25 DEG C, are prepared into water heater porcelain enamel steel liner.
Further, in step 3), to the weld seam of the water heater liner blank after drying front and away from weld-fusion line two
The thickness of base material surface smear glue frit for porcelain enamel in the 5~50mm width ranges of side, the vitreous enamel bed of material is 0.3~1mm, is such as warded off
The thickness of the enamel bed of material is less than 0.3mm, then the vitreous enamel bed of material is too thin, no positive effect；If glaze layer thickness is more than 1.0mm, then
The vitreous enamel bed of material is too thick, is not only susceptible to enamel layer cracking, but also increase manufacturing cost.Applicant, for many years the study found that heat
The frit for porcelain enamel of the back of weld of thickness >=water heater liner blank of the positive vitreous enamel bed of material of weld seam of water heater liner blank
The thickness of layer, best results.
In the method for the present invention, the weld seam face side of water heater liner is the outer surface of water heater liner.
The method of the present invention passes through to water heater liner blank weld seam front and away from melt run both sides 5~50mm width ranges
Interior base material carries out enamel firing process, can not only prevent the region surface oxidation and decarbonization, and pass through enamel firing process
Obtain certain thickness enamel layer so that water heater porcelain enamel steel liner welding point obtains more large bearing capacity and rigidity, improves
The yield deformation drag of water heater porcelain enamel steel liner welding point.
To pressing the welding point for the water heater porcelain enamel steel liner that single side enamel technology is handled in the prior art and by the present invention
The welding point of the water heater porcelain enamel steel liner of method processing tests its yield deformation drag respectively, and the method for the present invention can improve
Water heater porcelain enamel steel liner welding point obtains yield deformation drag 5~15%.
The present invention has following good effect compared with prior art：1, the method for the present invention improves water heater porcelain enamel steel liner
The bearing capacity of welding point extends the fatigue life of water heater porcelain enamel steel liner welding point, can effectively prevent hot water
Device glassed steel liner welding point heat affected area surface oxidation, decarburization improve the surrender of water heater porcelain enamel steel liner welding point and become
Shape drag 5~15%, overcoming water heater porcelain enamel steel liner welding point heat-affected zone softened in the prior art causes to connect
The defect that the decline of head yield deformation drag, welding point fatigue life decline, thoroughly solves because water heater porcelain enamel steel liner welds
The problem of connecing water heater porcelain enamel steel liner leak caused by joint cracking.2, the method for the present invention manipulation is easy, and implementation cost is low.
Description of the drawings
Fig. 1 is the schematic cross-section of water heater porcelain enamel steel liner welding point of the embodiment of the present invention.
Description of symbols in figure：1- enamel steel substrates, 2- weld seams, 3- enamel layers.
Specific implementation mode
Below in conjunction with the accompanying drawings 1 and specific embodiment the present invention is further illustrated.
Embodiment 1, water heater porcelain enamel steel substrate are the acid that the trade mark of Baoshan Iron ＆ Steel Co., Ltd's production is BTC330R
Wash steel plate, steel plate thickness 1.8mm.
Referring to Fig.1, a method of improving water heater porcelain enamel steel liner welding point yield deformation drag, including following step
Suddenly：
1) water heater liner blank is prepared, water heater liner enamel steel substrate 1 is cut by the size of water heater liner, it will
It is to be welded to forming the docking of I shape grooves that the water heater liner cut carries out splicing group with enamel steel substrate 1 successively；Using plasma
The welding of enamel steel substrate 1 of group pair is formed weld seam 2 by melting welding single side forming a solder technique, and water heater liner blank is made；
2) degreasing and activation process are carried out to water heater liner blank surface successively, water heater liner blank is first placed in dress
In the container for having degreasing agent solution, water heater liner blank is impregnated with degreasing agent (NaOH+ activating agents) solution of mass concentration 5%
25 seconds, the grease on removal water heater liner surface；Then the water heater liner blank after degreasing is placed in molten equipped with dilute sulfuric acid
In the container of liquid, water heater liner blank is impregnated 25 seconds with the dilution heat of sulfuric acid of mass concentration 5%；It then takes out in water heater
Courage blank, with deionized water by water heater liner blank surface rinsed clean, with 80 DEG C of hot-airs to water heater liner blank table
Face purges 5 seconds；
3) frit for porcelain enamel is coated with to water heater liner blank surface with wet coating, with deionized water by frit for porcelain enamel dry powder tune
Gluey frit for porcelain enamel is made, the quality proportioning of frit for porcelain enamel dry powder and deionized water is 200 in gluey frit for porcelain enamel：30；To blowing
All base material surface smear glue frit for porcelain enamel in 2 back side of weld seam and the same side of water heater liner blank after dry, vitreous enamel
The thickness of the bed of material is 0.3mm；The front of weld seam 2 to water heater liner blank and away from weld-fusion line both sides 20mm width ranges
The thickness of interior base material surface smear glue frit for porcelain enamel, the vitreous enamel bed of material is 0.5mm；
4) enamel firing processing is carried out to water heater liner blank, the heat of frit for porcelain enamel will be first coated with 6 DEG C/min heating speeds
Water heater liner blank is heated to 110 DEG C from 15 DEG C；Then water heater liner blank is added from 110 DEG C with 15 DEG C/min heating speeds
Heat is to 310 DEG C；Water heater liner blank is heated to 780 DEG C from 310 DEG C with 60 DEG C/min heating speeds afterwards, at 780 DEG C to heat
Water heater liner blank high temperature enamel firing 5min generates enamel layer 3；With 60 DEG C/min cooling velocities by the water heater liner after enamel firing
It is cooled to 310 DEG C from 780 DEG C；The water heater liner after enamel firing is cooled to 20 DEG C from 310 DEG C with 10 DEG C/min cooling velocities,
It is prepared into water heater porcelain enamel steel liner.
Welding point and present invention reality to the water heater porcelain enamel steel liner for pressing the processing of single side enamel technology in the prior art
The welding point for applying 1 water heater porcelain enamel steel liner of example tests its yield deformation drag respectively：By single side enamel work in the prior art
The single side enamel layer thickness of skill processing is that the steel plate of 0.3mm is processed into the sample of 25mm × 200mm, and stretching measures sample and occurs to bend
The minimum load of clothes deformation is 14.8KN；1 enamelled pressed steel of the embodiment of the present invention is processed into the sample of 25mm × 200mm, is stretched
It is 16.3KN to measure sample the minimum load of yield deformation occurs, and the present invention, which implements 1, can improve the weldering of water heater porcelain enamel steel liner
Connector obtains yield deformation drag 10%.
Embodiment 2, water heater porcelain enamel steel substrate are the acid that the trade mark of Baoshan Iron ＆ Steel Co., Ltd's production is BTC330R
Wash steel plate, steel plate thickness 1.6mm.
Referring to Fig.1, a method of improving water heater porcelain enamel steel liner welding point yield deformation drag, including following step
Suddenly：
1) water heater liner blank is prepared, water heater liner enamel steel substrate 1 is cut by the size of water heater liner, it will
It is to be welded to forming the docking of I shape grooves that the water heater liner cut carries out splicing group with enamel steel substrate 1 successively；Using TIG argons
The welding of enamel steel substrate 1 of group pair is formed weld seam 2 by arc-welding melting welding single side forming a solder technique, and water heater liner hair is made
Base；
2) degreasing and activation process are carried out to water heater liner blank surface successively, water heater liner blank is first placed in dress
In the container for having degreasing agent solution, water heater liner hair is impregnated with degreasing agent (NaOH+ activating agents) solution of mass concentration 3.5%
Base 40 seconds, the grease on removal water heater liner surface；Then the water heater liner blank after degreasing is placed in equipped with dilute sulfuric acid
In the container of solution, water heater liner blank is impregnated 35 seconds with the dilution heat of sulfuric acid of mass concentration 3.5%；Then take out hot water
Device liner blank, with deionized water by water heater liner blank surface rinsed clean, with 90 DEG C of hot-airs to water heater liner hair
Base surface purges 3 seconds；
3) frit for porcelain enamel is coated with to water heater liner blank surface with wet coating, with deionized water by frit for porcelain enamel dry powder tune
Gluey frit for porcelain enamel is made, the quality proportioning of frit for porcelain enamel dry powder and deionized water is 200 in gluey frit for porcelain enamel：20；To blowing
All base material surface smear glue frit for porcelain enamel in 2 back side of weld seam and the same side of water heater liner blank after dry, vitreous enamel
The thickness of the bed of material is 0.7mm；The front of weld seam 2 to water heater liner blank and away from weld-fusion line both sides 50mm width ranges
The thickness of interior base material surface smear glue frit for porcelain enamel, the vitreous enamel bed of material is 0.9mm；
4) enamel firing processing is carried out to water heater liner blank, the heat of frit for porcelain enamel will be first coated with 10 DEG C/min heating speeds
Water heater liner blank is heated to 130 DEG C from 15 DEG C, it is ensured that drying water heater liner blank；It then will with 20 DEG C/min heating speeds
Water heater liner blank is heated to 350 DEG C from 130 DEG C；Afterwards with 80 DEG C/min heating speeds by water heater liner blank from 350 DEG C
820 DEG C are heated to, enamel layer 3 is generated to water heater liner blank high temperature enamel firing 3min at 820 DEG C；With 80 DEG C/min cooling velocities
Water heater liner after enamel firing is cooled to 300 DEG C from 820 DEG C；With 15 DEG C/min cooling velocities by the water heater after enamel firing
Liner is cooled to 20 DEG C from 300 DEG C, is prepared into water heater porcelain enamel steel liner.
Welding point and present invention reality to the water heater porcelain enamel steel liner for pressing the processing of single side enamel technology in the prior art
The welding point for applying 2 water heater porcelain enamel steel liner of example tests its yield deformation drag respectively：By single side enamel work in the prior art
The single side enamel layer thickness of skill processing is that the steel plate of 0.7mm is processed into the sample of 25mm × 200mm, and stretching measures sample and occurs to bend
The minimum load of clothes deformation is 15.2KN, and 2 enamelled pressed steel of the embodiment of the present invention is processed into the sample of 25mm × 200mm, is stretched
It is 17.3KN to measure sample the minimum load of yield deformation occurs, and the method for the present invention can improve the welding of water heater porcelain enamel steel liner
Connector obtains yield deformation drag 14.5%.
Embodiment 3, water heater porcelain enamel steel substrate are the acid that the trade mark of Baoshan Iron ＆ Steel Co., Ltd's production is BTC330R
Wash steel plate, steel plate thickness 1.5mm.
Referring to Fig.1, a method of improving water heater porcelain enamel steel liner welding point yield deformation drag, including following step
Suddenly：
1) water heater liner blank is prepared, water heater liner enamel steel substrate 1 is cut by the size of water heater liner, it will
It is to be welded to forming the docking of I shape grooves that the water heater liner cut carries out splicing group with enamel steel substrate 1 successively；Using MAG gas
It protects weldering melting welding single side forming a solder technique and the welding of enamel steel substrate 1 of group pair is formed into weld seam 2, water heater liner hair is made
Base；
2) degreasing and activation process are carried out to water heater liner blank surface successively, water heater liner blank is first placed in dress
In the container for having degreasing agent solution, water heater liner blank is impregnated with degreasing agent (NaOH+ activating agents) solution of mass concentration 3%
40 seconds, the grease on removal water heater liner surface；Then the water heater liner blank after degreasing is placed in molten equipped with dilute sulfuric acid
In the container of liquid, water heater liner blank is impregnated 35 seconds with the dilution heat of sulfuric acid of mass concentration 3%；It then takes out in water heater
Courage blank, with deionized water by water heater liner blank surface rinsed clean, with 95 DEG C of hot-airs to water heater liner blank table
Face purges 3 seconds；
3) frit for porcelain enamel is coated with to water heater liner blank surface with wet coating, with deionized water by frit for porcelain enamel dry powder tune
Gluey frit for porcelain enamel is made, the quality proportioning of frit for porcelain enamel dry powder and deionized water is 200 in gluey frit for porcelain enamel：20；To blowing
All base material surface smear glue frit for porcelain enamel in 2 back side of weld seam and the same side of water heater liner blank after dry, vitreous enamel
The thickness of the bed of material is 0.5mm；The front of weld seam 2 to water heater liner blank and away from weld-fusion line both sides 30mm width ranges
The thickness of interior base material surface smear glue frit for porcelain enamel, the vitreous enamel bed of material is 0.8mm；
4) enamel firing processing is carried out to water heater liner blank, the heat of frit for porcelain enamel will be first coated with 10 DEG C/min heating speeds
Water heater liner blank is heated to 150 DEG C from 15 DEG C, it is ensured that drying water heater liner blank；It then will with 25 DEG C/min heating speeds
Water heater liner blank is heated to 350 DEG C from 150 DEG C；Afterwards with 100 DEG C/min heating speeds by water heater liner blank from 350 DEG C
850 DEG C are heated to, enamel layer 3 is generated to water heater liner blank high temperature enamel firing 3min at 850 DEG C；Speed is cooled down with 100 DEG C/min
Water heater liner after enamel firing is cooled to 300 DEG C by degree from 850 DEG C；With 25 DEG C/min cooling velocities by the hot water after enamel firing
Device liner is cooled to 20 DEG C from 300 DEG C, is prepared into water heater porcelain enamel steel liner.
Welding point and present invention reality to the water heater porcelain enamel steel liner for pressing the processing of single side enamel technology in the prior art
The welding point for applying 3 water heater porcelain enamel steel liner of example tests its yield deformation drag respectively：By single side enamel work in the prior art
The steel plate of the single side enamel layer thickness 0.5mm of skill processing is processed into the sample of 25mm × 200mm, and stretching measures sample and surrenders
The minimum load of deformation is 14.9KN, and 3 enamelled pressed steel of the embodiment of the present invention is processed into the sample of 25mm × 200mm, stretches and surveys
It is 17.1KN to obtain sample the minimum load of yield deformation occurs, and the method for the present invention can improve water heater porcelain enamel steel liner and connect
Head obtains yield deformation drag 14.8%.
In addition to the implementation, the present invention can also have other embodiment.It is all to use equivalent substitution or equivalent transformation shape
At technical solution, fall within the scope of protection required by the present invention.
Claims (2)
1. a kind of method improving water heater porcelain enamel steel liner welding point yield deformation drag, characterized in that the method
Include the following steps：
1) water heater liner blank is prepared, water heater liner enamel steel substrate is cut by the size of water heater liner, will cut
Good water heater liner carries out splicing group pair and welding with enamel steel substrate successively, and water heater liner blank is made；
2) degreasing and activation process are carried out to water heater liner blank surface successively, first water heater liner blank is placed in equipped with de-
In the container of fat agent solution, water heater liner blank is impregnated 20~50 seconds with degreasing agent solution, removal water heater liner surface
Grease；Then the water heater liner blank after degreasing is placed in the container equipped with weak acid solution, impregnates heat with weak acid solution
Water heater liner blank 20~50 seconds；Water heater liner blank is taken out from weak acid solution, with deionized water by water heater liner hair
Base surface rinsed clean purges water heater liner blank surface 2~5 seconds with 80~100 DEG C of hot-airs；
3) frit for porcelain enamel is coated with to water heater liner blank surface with wet coating, is modulated into frit for porcelain enamel dry powder with deionized water
Gluey frit for porcelain enamel, the quality proportioning of frit for porcelain enamel dry powder and deionized water is 200 in gluey frit for porcelain enamel：30~200：20；
All base material surface smear glue frit for porcelain enamel of back of weld and the same side to the water heater liner blank after drying, enamel
The thickness of glaze layer is 0.1~0.8mm；To the weld seam of the water heater liner blank after drying front and away from weld-fusion line two
The thickness of base material surface smear glue frit for porcelain enamel in the 5~50mm width ranges of side, the vitreous enamel bed of material is 0.3~1mm；
4) enamel firing processing is carried out to water heater liner blank, the heat of frit for porcelain enamel will be first coated with 5~10 DEG C/min heating speeds
Water heater liner blank is slowly heated to 100~150 DEG C from 15~25 DEG C, it is ensured that drying water heater liner blank；Then with 10~
Water heater liner blank is heated to 300~350 DEG C by 20 DEG C/min heating speeds from 100~150 DEG C；With 50~100 DEG C/min
Water heater liner blank is heated to 750~850 DEG C by heating speed from 300~350 DEG C, at 750~850 DEG C to water heater liner
3~5min of blank high temperature enamel firing generates enamel layer；With 50~100 DEG C/min cooling velocities by the water heater liner after enamel firing from
750~850 DEG C are cooled to 300~350 DEG C；With 5~20 DEG C/min cooling velocities by the water heater liner after enamel firing from 300~
350 DEG C slowly cool to 15~25 DEG C, are prepared into water heater porcelain enamel steel liner.
2. a kind of method improving water heater porcelain enamel steel liner welding point yield deformation drag as described in claim 1,
It is characterized in, the back of weld of thickness >=water heater liner blank of the positive vitreous enamel bed of material of weld seam of water heater liner blank
The thickness of the vitreous enamel bed of material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710152827.8A CN108620761B (en) | 2017-03-15 | 2017-03-15 | Method for improving yield deformation resistance of welding joint of enamel steel liner of water heater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710152827.8A CN108620761B (en) | 2017-03-15 | 2017-03-15 | Method for improving yield deformation resistance of welding joint of enamel steel liner of water heater |
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| Publication Number | Publication Date |
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| CN108620761A true CN108620761A (en) | 2018-10-09 |
| CN108620761B CN108620761B (en) | 2020-08-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113624937A (en) * | 2020-05-06 | 2021-11-09 | 上海梅山钢铁股份有限公司 | Method for detecting fish scaling resistance of hot-rolled pickled enameled steel plate |
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| CN103836797A (en) * | 2014-03-06 | 2014-06-04 | 江苏迈能高科技有限公司 | Double-interlayer inner container of water heater and assembling technique of double-interlayer inner container |
| CN105399328A (en) * | 2015-11-20 | 2016-03-16 | 平顶山市圣康炊具有限公司 | High-strength enamel pan and production technology thereof |
| CN106288396A (en) * | 2016-10-21 | 2017-01-04 | 江阴硅普搪瓷股份有限公司 | A kind of pair of D-shaped quick-acting water heater inner bag and the fusion method of enamel glass coating thereof |
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| CN113624937A (en) * | 2020-05-06 | 2021-11-09 | 上海梅山钢铁股份有限公司 | Method for detecting fish scaling resistance of hot-rolled pickled enameled steel plate |
| CN113624937B (en) * | 2020-05-06 | 2022-07-15 | 上海梅山钢铁股份有限公司 | Method for detecting fish scaling resistance of hot-rolled pickled enameled steel plate |
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