CN111760915A - Detection device and detection method for steel billet sprayed with high-temperature antioxidant coating - Google Patents
Detection device and detection method for steel billet sprayed with high-temperature antioxidant coating Download PDFInfo
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- CN111760915A CN111760915A CN202010651128.XA CN202010651128A CN111760915A CN 111760915 A CN111760915 A CN 111760915A CN 202010651128 A CN202010651128 A CN 202010651128A CN 111760915 A CN111760915 A CN 111760915A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
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- C—CHEMISTRY; METALLURGY
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/68—Temporary coatings or embedding materials applied before or during heat treatment
- C21D1/70—Temporary coatings or embedding materials applied before or during heat treatment while heating or quenching
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Abstract
The invention discloses a detection device and a detection method for a steel billet sprayed with a high-temperature antioxidant coating, and belongs to the technical field of steel billet surface quality detection. The invention relates to a detection device and a detection method for a steel billet sprayed with a high-temperature anti-oxidation coating, which comprises a heating furnace and a steel billet storage table, wherein an experimental steel billet is horizontally placed on the steel billet storage table, the experimental steel billet comprises a horizontally placed steel billet, a plurality of groups of test blocks are placed on the steel billet at equal intervals, and the test blocks are shielded to distinguish blank test blocks and sprayed test blocks; carrying out on-line spraying and furnace heating on the experimental steel billet loaded with the test block, and independently lifting and storing the experimental steel billet taken out of the furnace; and rapidly taking off the test blocks on the experimental steel billets in the same production batch, and reflecting the using effect of the high-temperature antioxidant coating by counting and calculating the burning loss change conditions of the sprayed test blocks and the blank test blocks so as to eliminate the uncertain influence brought under the non-same production working condition.
Description
Technical Field
The invention relates to the technical field of billet surface quality detection, in particular to a detection device and a detection method for a billet sprayed with a high-temperature antioxidant coating.
Background
Generally, a billet needs to be heated at a high temperature in a heating furnace before rolling, and the surface of the billet and oxygen in the atmosphere undergo a strong oxidation reaction at a high temperature to generate a large amount of scale. According to statistics, in the production of metallurgical enterprises, the oxidation burning loss caused by high-temperature oxidation of the surface of a steel billet reaches 0.5-2.5%; in the machine shop, this oxidation burn-off represents about 5% of the weight of the blank during forging. The oxidation burning loss not only affects the yield loss of steel production, but also directly affects the product quality due to incomplete removal of the iron scale, and a large amount of social resources are consumed for cleaning and recycling the iron scale. In order to effectively inhibit the occurrence of high-temperature oxidation in a heating furnace, the technology of spraying the high-temperature anti-oxidation coating on the billet on line is applied, namely the anti-oxidation isolation coating is sprayed on the surface of the billet before the billet enters the furnace, and the anti-oxidation isolation coating on the surface of the billet forms a layer of protective isolation layer to isolate furnace gas in the high-temperature heating process of the billet entering the furnace, thereby achieving the purposes of inhibiting high-temperature oxidation reaction and reducing oxidation burning loss.
The using effect of the high-temperature antioxidant coating directly reflects the cost performance of the product, and the high-temperature antioxidant coating is very concerned by the using party, the developing party and the supplying party of the coating. Scientific and objective detection and judgment methods are important, laboratory experimental data cannot reflect the real use effect of the field working condition, parameters such as yield and the like on the field can theoretically reflect the change condition of oxidation burning loss, but in actual operation, the real use effect of the field working condition cannot be accurately reflected due to the influences of factors such as large weighing error, cutting loss in the rolling process and the like caused by large dead weight of steel billets.
Disclosure of Invention
1. Technical problem to be solved by the invention
Aiming at the problems of errors and the like in the detection of the using effect of the high-temperature anti-oxidation coating for the steel billet in the prior art, the invention provides the detection device and the detection method for the steel billet sprayed with the high-temperature anti-oxidation coating.
2. Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a detection device for steel billets sprayed with high-temperature anti-oxidation coatings comprises a heating furnace and a steel billet storage table, wherein experimental steel billets are horizontally placed on the steel billet storage table and comprise the horizontally placed steel billets, a plurality of groups of blank test blocks and spraying test blocks are placed on the steel billets at equal intervals, the experimental steel billets mainly aim at bearing the experimental test blocks so as to complete the subsequent whole process, the size and the material of the experimental steel billets are consistent with those of the produced steel billets, the thickness of the experimental steel billets is about 0.23 multiplied by 1.4 multiplied by 12m, and the surface of the bearing test blocks needs to be smooth; the spraying effect is reflected by the burning loss change of the blank test block and the spraying test block; the steel grade of the experimental test block is consistent with that of the produced steel billet, the size of the experimental test block is 30 multiplied by 140mm, the accuracy is +/-1 mm, the weight difference between the test blocks is +/-5 g, and the surface is smooth and oilless; the heating furnace outside is provided with online spraying and conveying unit, online spraying and conveying unit include that the level sets up the dress steel side roller way of steel mouthful department in the heating furnace to and the level sets up the side roller way of going out of the stove in heating furnace steel tapping department, reflect high temperature anti-oxidant coating result of use through the change condition of spraying test block and blank test block scaling loss under the same production operating mode of contrast, got rid of the uncertain influence that brings under all non-same production operating modes, and data pertinence, the representativeness is stronger.
According to the technical scheme, the steel loading side roller way is coaxially sleeved and fixedly provided with the online spraying equipment, when the production steel billet block is conveyed to the lower part of the production steel billet block through the steel loading side roller way, the online spraying equipment can automatically and uniformly spray the high-temperature anti-oxidation coating on the upper surface and the lower surface of the experimental steel billet, the online spraying equipment has a spraying amount control function, and the spraying amount can be adjusted.
According to a further technical scheme, the furnace discharging side roller way is horizontally arranged, one side of the furnace discharging side roller way is a rolling mill side, and the outer end of the rolling mill side is connected with a rolling mill system; the other side of the furnace discharging side roller way is a non-rolling-machine side, and the discharged experimental steel billet on the non-rolling-machine side is conveyed to a steel billet storage platform along with the roller way; the furnace discharging side roller way is used for conveying the heated furnace discharged experimental billets to a rolling mill system for rolling or rolling back, wherein the furnace discharged experimental billets conveyed along the side of the rolling mill are conveyed to the rolling mill system for rolling treatment; the experimental billet after tapping, which is conveyed along the non-rolling mill side, is returned to the billet storage table for detection, so that the experimental billet after tapping can be lifted out and stored independently without entering a rolling line along with the production billet, and normal production of the rolling line is not affected.
According to the technical scheme, the device comprises a field test unit, wherein the field test unit comprises an experimental steel billet, an experimental steel billet after discharging and an electronic platform scale, the metering precision of the electronic platform scale is 0.1g, the maximum measuring range is 5000g, the mass of a test block on the experimental steel billet before and after burning loss is weighed, and the change of the burning loss of the test block is calculated, so that the using effect of the high-temperature antioxidant coating is reflected.
A detection method of a steel billet sprayed with a high-temperature antioxidant coating comprises the following steps:
step one, arranging test blocks on experimental steel billets: horizontally placing steel billets on a steel billet storage table, and placing a plurality of groups of blank test blocks and spraying test blocks on the steel billets at equal intervals;
step two, online spraying of experimental billets: the method comprises the following steps of putting an experimental steel billet on a roller way from one end of a steel loading side roller way, automatically and uniformly spraying high-temperature anti-oxidation coating on the upper surface and the lower surface of the experimental steel billet when an online spraying device on the roller way recognizes that the experimental steel billet passes through the online spraying device, wherein the spraying amount can be adjusted;
step three, heating an experimental steel billet: conveying the sprayed experimental steel billet from a steel inlet of the heating furnace to the heating furnace by a steel loading side roller way for heating, thereby heating the experimental steel billet in the conveying process to a process temperature meeting the rolling requirement;
step four, detecting the test block after discharging: conveying the discharged experimental steel billet to a discharge side roller way from a steel outlet of a heating furnace, conveying the discharged experimental steel billet to a steel billet storage table along the non-rolling-mill side direction along the discharge side roller way, quickly taking down blank test blocks and spraying test blocks placed on the experimental steel billet, carrying out water cooling, descaling, drying and other treatment on the blank test blocks and the spraying test blocks, and weighing each test block by adopting an electronic platform scale.
According to a further technical scheme, in the step one, the surface of the experimental billet is flat, smooth and oilless, and blank test blocks and spraying test blocks are weighed by an electronic platform scale in advance.
According to the further technical scheme, in the second step, before spraying, the blank test block wraps all six surfaces of the test block with the oilless paper, the sprayed test block wraps the lower surface and the peripheral side surfaces of the test block with the oilless paper, after the sprayed test steel blank enters the heating furnace, the oilless paper is burnt at high temperature and separated, the blank test block and the sprayed test block are different in that the upper surface of the sprayed test block is provided with one layer of high-temperature oxidation-resistant coating more than that of the blank test block, so that the correlation between the spraying amount per unit area and the oxidation burning loss reduction amount is deduced, and the optimal spraying parameter is found.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
(1) the invention relates to a detection device and a detection method for a steel billet sprayed with a high-temperature anti-oxidation coating, which select a steel billet to be heated in a furnace as an experimental steel billet, regularly arrange a plurality of weighed test blocks with consistent block sizes and materials on the upper surface of the steel billet, and shield the test blocks to distinguish blank test blocks and sprayed test blocks; the experimental steel billet loaded with the test block enters the production flow along with the production steel billet to complete the processes of on-line spraying, furnace entering heating and furnace discharging, and the experimental steel billet discharged from the furnace does not enter a rolling line along with the production steel billet and is separately lifted out for storage; rapidly taking down test blocks on experimental steel billets in the same production batch, performing water cooling, descaling, drying, weighing and other operations on the test blocks, reflecting the using effect of the high-temperature antioxidant coating by counting and calculating the burning loss change conditions of the sprayed test blocks and blank test blocks, and eliminating the uncertain influence caused by the test blocks under the same production working condition;
(2) the invention relates to a detection device and a detection method for a steel billet sprayed with a high-temperature anti-oxidation coating, wherein a steel billet on-line spraying and conveying unit comprises a steel loading side roller way, a furnace discharging side roller way and on-line spraying equipment, and the roller way is transportation equipment for conveying rolled pieces by using the rotation of cylindrical rollers; the steel loading side roller way is used for conveying the heated steel billet to a steel inlet of the heating furnace; the furnace discharging side roller way is used for conveying the heated steel billets to a rolling mill system for rolling or rolling back; the online spraying equipment is arranged on a track of a steel-loading side roller way of the heating furnace, and when a production steel billet block is identified to be conveyed to the lower part of the production steel billet block by the steel-loading side roller way, the online spraying equipment automatically and uniformly sprays high-temperature antioxidant coating on the upper surface and the lower surface of the steel billet, has a spraying amount control function, and can set and adjust the spraying amount;
(3) the invention relates to a detection device and a detection method for a steel billet sprayed with a high-temperature anti-oxidation coating, wherein a field test unit comprises an experimental steel billet, the experimental steel billet discharged from a furnace and an electronic platform scale, the metering precision of the electronic platform scale is 0.1g, the maximum measuring range is 5000g, and the using effect of the high-temperature anti-oxidation coating is reflected by weighing the mass of a test block on the experimental steel billet before and after burning and calculating the change of the burning loss of the test block;
(4) according to the detection device and the detection method for the steel billet sprayed with the high-temperature anti-oxidation coating, after weighing and before placing and spraying, the blank test block wraps all six surfaces of the test block with the oilless paper, the sprayed test block wraps the lower surface and the peripheral side surfaces of the test block with the oilless paper, after the sprayed test steel billet enters a heating furnace, the oilless paper is burnt and separated at high temperature, the blank test block and the sprayed test block are different in that the upper surface of the sprayed test block is provided with a layer of high-temperature anti-oxidation coating more than the blank test block, and the spraying amount per unit area and the reduction amount of the oxidation burning loss are found to have a certain correlation through calculation, so that the best spraying parameter is found, and the economic benefit maximization is realized.
Drawings
FIG. 1 is a process flow diagram of the detection apparatus of the present invention;
FIG. 2 is a layout diagram of test blocks on experimental billets according to the present invention.
In the figure: 1-heating a furnace; 2-a billet storage table; 3-an online spraying and conveying unit; 4-a rolling mill system; 5-blank test block; 6-spraying a test block; 11-heating the transport direction; 21-a steel billet; 22-experimental steel billet; 23-discharging the experimental steel billet; 31-on-line spraying equipment; 32-installing a steel side roller way; 33-a furnace-out side roller way; 331-the mill side; 332-non-mill side.
Detailed Description
For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings.
Example 1
The detection device for the steel billet sprayed with the high-temperature anti-oxidation coating comprises a heating furnace 1 and a steel billet storage table 2, wherein an experimental steel billet 22 is horizontally placed on the steel billet storage table 2, the experimental steel billet 22 comprises a horizontally placed steel billet 21, as shown in fig. 2, a plurality of groups of blank test blocks 5 and spraying test blocks 6 are placed on the steel billet 21 at equal intervals, the experimental steel billet 22 is mainly used for bearing the experimental test blocks to complete the subsequent whole process, the size and the material of the experimental steel billet are consistent with those of the produced steel billet, about 0.23 × 1.4 × 12m, and the surface of the bearing test block needs to be smooth; the spraying effect is reflected by the burning loss change of the blank test block 5 and the spraying test block 6; the steel grade of the experimental test block is consistent with that of the produced steel billet, the size of the experimental test block is 30 multiplied by 140mm, the accuracy is +/-1 mm, the weight difference between the test blocks is +/-5 g, and the surface is smooth and oilless; the online spraying and conveying unit 3 is arranged outside the heating furnace 1, the online spraying and conveying unit 3 comprises a steel loading side roller way 32 horizontally arranged at a steel inlet of the heating furnace 1 and a furnace outlet side roller way 33 horizontally arranged at a steel outlet of the heating furnace 1, the use effect of the high-temperature antioxidant coating is reflected by comparing the burning loss change conditions of the sprayed test block 6 and the blank test block 5 under the same production working condition, the uncertainty influence caused by all non-same production working conditions is eliminated, and the data pertinence and the representativeness are stronger; the steel loading side roller bed 32 is coaxially sleeved and fixedly provided with an online spraying device 31, when a production steel billet block is identified to be conveyed to the lower part of the production steel billet block by the steel loading side roller bed, the online spraying device 3 can automatically and uniformly spray high-temperature antioxidant coating on the upper surface and the lower surface of the experimental steel billet 22, and has a spraying amount control function, and the spraying amount can be adjusted; .
Example 2
The basic structure of the detection device for the steel billet sprayed with the high-temperature anti-oxidation coating is the same as that of the detection device in the embodiment 1, and the differences and improvements are as follows: as shown in fig. 1, the tapping side roller table 33 is horizontally arranged, one side of the tapping side roller table is a rolling mill side 331, and the outer end of the rolling mill side 331 is connected with a rolling mill system 4; the other side of the furnace discharging side roller way 33 is a non-rolling-machine side 332, and the furnace-discharged experimental billet 23 on the non-rolling-machine side 332 is conveyed to the billet storage table 2 along with the roller way; the tapping side roller table 33 is used for conveying the heated tapping experimental billet 23 to the rolling mill system 4 for rolling or retracting, wherein the tapping experimental billet 23 conveyed along the rolling mill side 331 is conveyed to the rolling mill system 4 for rolling treatment; the discharged experimental billet 23 conveyed along the non-rolling-mill side 332 is returned to the billet storage table 2 for detection, so that the discharged experimental billet 23 can be independently lifted out and stored without entering a rolling line along with a production billet, and normal production of the rolling line is not affected.
Example 3
The basic structure of the detection device for the steel billet sprayed with the high-temperature anti-oxidation coating is the same as that of the embodiment 2, and the differences and improvements are as follows: the test bed further comprises a field test unit, wherein the field test unit comprises an experimental billet 22, an experimental billet 23 after discharge and an electronic platform scale, the electronic platform scale has the metering precision of 0.1g and the maximum measuring range of 5000g, and the using effect of the high-temperature antioxidant coating is reflected by weighing the mass of test blocks on the experimental billet before and after burning and calculating the change of the burning loss of the test blocks;
in this embodiment, the test blocks before and after the experiment are weighed, counted, and calculated to obtain the following data, as shown in table 1:
TABLE 1
As can be seen from table 1, after the high-temperature antioxidant coating is sprayed on the upper surface (area 0.14 × 0.14 — 0.0196m2) of the experimental test block, the burning loss is reduced by 51.5g, and the burning loss per unit area is reduced by 2.607 kg/m;
during the actual production process, the outer surface of the billet is completely exposed in furnace gas in the heating process of the billet in the furnace, and the spraying equipment only sprays the upper surface and the lower surface of the billet and does not spray the periphery of the billet.
As shown in Table 2, assuming that the spraying effects on the upper and lower surfaces are the same, the billet size is 0.23m × 1.4m × 12m, and the billet density is measured by taking 7.9t/m 3:
TABLE 2
The weight of the steel billet is 1.4 multiplied by 0.23 multiplied by 12 multiplied by 7.9 which is 30.53 t;
the sum of the upper surface area and the lower surface area of the billet is 1.4 multiplied by 12 multiplied by 2 which is 33.6m 2;
the burning loss caused by spraying high-temperature oxidation resistant paint on the upper and lower surface areas of the billet is reduced to 33.6 multiplied by 2.607 which is 1025.66kg, and the corresponding oxidation burning loss is reduced to 1025.66/30.53/1000 multiplied by 100 which is 0.287%, namely, after the paint is used, the oxidation of each ton of steel is reduced to 2.87 kg.
Example 4
The basic structure of the detection method of the steel billet sprayed with the high-temperature anti-oxidation coating is the same as that of the embodiment 3, and the differences and improvements are as follows: as shown in fig. 1, the method comprises the following steps:
step one, arranging test blocks on the experimental steel billet 22: horizontally placing a steel billet 21 on the steel billet storage table 2, and placing a plurality of groups of blank test blocks 5 and spraying test blocks 6 on the steel billet 21 at equal intervals;
step two, carrying out online spraying on the experimental steel billet 22: putting the experimental steel billet 22 on a roller way 32 from one end of the steel side roller way, and automatically and uniformly spraying high-temperature antioxidant coating on the upper and lower surfaces of the experimental steel billet 22 when the online spraying equipment 31 on the roller way recognizes that the experimental steel billet 22 passes through the online spraying equipment, wherein the spraying amount can be adjusted;
step three, heating the experimental steel billet 22: the steel loading side roller table 32 conveys the sprayed experimental billet 22 from the steel inlet of the heating furnace 1 into the heating furnace 1 for heating, so that the experimental billet 22 in the conveying process is heated to the process temperature meeting the rolling requirement;
step four, detecting the test block after discharging: conveying the discharged experimental billet 23 from a steel outlet of the heating furnace 1 to a discharge side roller way 33, conveying the discharged experimental billet 23 to a billet storage table 2 along a direction of a non-rolling side 332 along the discharge side roller way 33, quickly taking down a blank test block 5 and a spraying test block 6 which are placed on the experimental billet 23, carrying out water cooling, descaling, drying and other treatment on the blank test block and the spraying test block, and weighing each test block by adopting an electronic platform scale;
in this embodiment, in the first step, the surface of the experimental billet 22 is flat, smooth and oilless, and 24 experimental test blocks are placed on the experimental billet, where the experimental test blocks have the following technical requirements: the steel grade is consistent with the production billet, the size is 30 multiplied by 140mm, the accuracy is +/-1 mm, the weight difference between test blocks is +/-5 g, the surface is smooth and clean, and oil is not contained, an electronic platform scale is adopted to weigh each test block, and the electronic platform scale has the technical requirements that: the maximum measuring range is 5000g, the measuring precision is 0.1g, and an electronic platform scale is adopted to weigh each blank test block 5 and each spraying test block 6 in advance; and step two, before spraying, the blank test block 5 wraps all six surfaces of the test block with oilless paper, the sprayed test block 6 wraps the lower surface and the peripheral side surfaces of the test block with oilless paper, after the sprayed test billet 22 enters a heating furnace, the oilless paper is burnt and separated at a high temperature, and the blank test block 5 and the sprayed test block 6 are different in that the upper surface of the sprayed test block 6 has a layer of high-temperature anti-oxidation coating more than that of the blank test block 5 so as to deduce the correlation between the spraying amount per unit area and the oxidation burning loss, thereby finding the optimal spraying parameter.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (7)
1. The utility model provides a detection apparatus for spraying high temperature anti-oxidant coating steel billet, deposits platform (2) including heating furnace (1) and steel billet, its characterized in that: experimental billets (22) are horizontally placed on the billet storage table (2), the experimental billets (22) comprise horizontally placed billets (21), and a plurality of groups of blank test blocks (5) and spraying test blocks (6) are alternately placed on the billets (21) at equal intervals; the online spraying and conveying unit (3) is arranged outside the heating furnace (1), and the online spraying and conveying unit (3) comprises a steel loading side roller way (32) horizontally arranged at a steel inlet of the heating furnace (1) and a furnace outlet side roller way (33) horizontally arranged at a steel outlet of the heating furnace (1).
2. The detection device for the steel billet sprayed with the high-temperature anti-oxidation coating according to claim 1, is characterized in that: and an online spraying device (31) is coaxially sleeved and fixedly arranged on the steel loading side roller way (32).
3. The detection device for the steel billet sprayed with the high-temperature anti-oxidation coating according to claim 2, characterized in that: the furnace discharging side roller way (33) is horizontally arranged, one side of the furnace discharging side roller way is a rolling mill side (331), and the outer end of the rolling mill side (331) is connected with a rolling mill system (4); the other side of the furnace discharging side roller way (33) is a non-rolling mill side (332), and the discharged experimental billet (23) on the non-rolling mill side (332) is conveyed to the billet storage table (2) along with the roller way.
4. The detection device for the steel billet sprayed with the high-temperature anti-oxidation coating according to claim 3, wherein: the test device is characterized by further comprising a field test unit, wherein the field test unit comprises an experiment steel billet (22), an experiment steel billet (23) after being discharged and an electronic platform scale, the metering precision of the electronic platform scale is 0.1g, and the maximum measuring range is 5000 g.
5. A detection method for a steel billet sprayed with a high-temperature antioxidant coating is characterized by comprising the following steps:
step one, arranging test blocks on an experimental billet (22): horizontally placing steel billets (21) on the steel billet storage table (2), and placing a plurality of groups of blank test blocks (5) and spraying test blocks (6) on the steel billets (21) at equal intervals;
step two, carrying out on-line spraying on the experimental steel billet (22): putting an experimental billet (22) on a roller way (32) from one end of the steel loading side roller way, and automatically and uniformly spraying high-temperature antioxidant paint on the upper and lower surfaces of the experimental billet (22) when an online spraying device (31) on the roller way recognizes that the experimental billet (22) passes through the online spraying device, wherein the spraying amount can be adjusted;
step three, heating an experimental billet (22): conveying the sprayed experimental billet (22) from a steel inlet of the heating furnace (1) to the heating furnace (1) for heating by a steel loading side roller way (32);
step four, detecting the test block after discharging: the method comprises the following steps that after the steel is discharged, an experimental billet (23) is conveyed to a furnace discharging side roller way (33) from a steel outlet of a heating furnace (1), the experimental billet (23) after the steel is discharged is conveyed to a billet storage table (2) along the direction of a non-rolling machine side (332) along the furnace discharging side roller way (33), blank test blocks (5) and spraying test blocks (6) placed on the experimental billet (23) are rapidly taken down, water cooling, descaling, drying and other treatment are carried out on the blank test blocks and the spraying test blocks, and an electronic platform scale is used for weighing each test block.
6. The method for detecting the steel billet sprayed with the high-temperature anti-oxidation coating according to claim 5, wherein the method comprises the following steps: in the first step, the surface of the experimental billet (22) is flat, smooth and oilless, and each blank test block (5) and each spraying test block (6) are weighed by an electronic platform scale in advance.
7. The method for detecting the steel billet sprayed with the high-temperature anti-oxidation coating according to claim 6, wherein the method comprises the following steps: and step two, before spraying, the blank test block (5) wraps all six surfaces of the test block by using oil-free paper, and the sprayed test block (6) wraps the lower surface and the peripheral side surfaces of the test block by using the oil-free paper.
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