A method for manufacturing and applying a glass mat for hot extrusion of a steel pipe

Abstract

The present invention discloses a method for making and applying a glass mat for hot extrusion of a steel pipe, comprising the following steps: S1, powder mixing: uniformly mixing a first glass powder, a second glass powder, water glass and water according to a set ratio to obtain a glass powder mixture; S2, shaping: pouring the glass powder mixture into a glass mat mold, removing the glass mat mold after the glass powder mixture is uniformly shaped in the glass mat mold, and obtaining a formed glass mat; S3, baking and solidifying: placing the formed glass mat in an oven for heating and heat preservation for a period of time, and then cooling to room temperature with the furnace, so that the formed glass mat is baked and solidified; S4, moisture-proofing: taking out the solidified glass mat and placing it in a drying room for moisture-proofing. The present invention can effectively avoid the waste of glass powder raw materials, and the prepared glass mat has the excellent properties of high viscosity, high strength and low brittleness, which can greatly reduce cracking and damage during transportation and use.

Description

Technical Field

[0001] The invention belongs to the technical field of metal hot extrusion, and specifically relates to a manufacturing method and an application method of a glass mat for hot extrusion of a steel pipe. Background Art

[0002] During the hot extrusion process of the steel pipe, an annular die hole is formed between the extrusion die and the extrusion mandrel. The high-temperature metal billet flows out of the annular die hole under the push of the extrusion mandrel. The inner diameter of the steel pipe is determined by the diameter of the extrusion mandrel, and the outer diameter of the steel pipe is determined by the inner diameter of the extrusion die.

[0003] The hot extrusion of steel pipes is generally carried out under high temperature and high pressure, and the requirements for lubricants are very high. Glass mats can be used as lubricants in the hot extrusion molding process of steel pipes. Before extrusion, the glass mat is placed at the die mouth of the extrusion mold to isolate the extrusion mold from the high-temperature metal blank, which plays a role in heat insulation and protection for the extrusion mold. During the extrusion process, the high-temperature metal blank causes the glass mat to melt instantly. Under the action of the extrusion mandrel, the liquid glass flows with the high-temperature metal blank, and forms a layered and regular continuous melting and flowing lubricating film between the blank and the extrusion die, achieving the effects of heat insulation, protection and lubrication. Therefore, the use of glass mats in the hot extrusion molding process of steel pipes can reduce the wear of the extrusion die, increase the service life of the extrusion die, reduce the flow resistance of the high-temperature metal blank and improve the uniformity of metal flow, thereby improving the surface quality and dimensional accuracy of the extruded steel pipe profile.

[0004] The specifications of the glass powder used to make the glass pad, the preparation ratio of the glass powder and the production process of the glass pad all have a great influence on the performance of the glass pad. If the selected glass powder is not suitable, or the preparation ratio of the glass powder is not suitable, or the production process of the glass pad is not suitable, the viscosity of the glass pad will be low, the strength will not be high, and the brittleness will be high, which will greatly increase the cracking and damage during transportation and use, thereby affecting the hot extrusion effect of the steel pipe in the later stage. Moreover, if the performance of the glass pad is not good due to the inappropriate preparation ratio of the glass powder, the preparation ratio of the glass powder needs to be re-determined, which will cause a waste of glass powder raw materials. Summary of the invention

[0005] In view of the above-mentioned defects of the prior art, the present invention provides a method for preparing and applying a glass mat for hot extrusion of a steel pipe, which can effectively avoid the waste of glass powder raw materials. The prepared glass mat has excellent properties of high viscosity, high strength and low brittleness, and can greatly reduce cracking and damage during transportation and use.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A method for manufacturing a glass mat for hot extrusion of a steel pipe comprises the following steps:

[0008] S1, powder mixing: uniformly mixing the first glass powder, the second glass powder, water glass and water according to a set ratio to obtain a glass powder mixture;

[0009] S2, shaping: pouring the glass powder mixture into a glass mat mold, and removing the glass mat mold after the glass powder mixture is evenly shaped in the glass mat mold to obtain a shaped glass mat;

[0010] S3, baking and solidifying: putting the formed glass mat into an oven, heating and keeping the temperature for a period of time, and then cooling it to room temperature with the oven, so that the formed glass mat is baked and solidified;

[0011] S4, moisture-proof: take out the solidified glass mat and put it into a drying room for moisture-proof treatment.

[0012] Furthermore, in step S1: a main component of the first glass powder is a mixture of SiO2 and B2O3, the weight percentage of the mixture of SiO2 and B2O3 in the first glass powder is 96±2wt%, and the first glass powder also includes 4±2wt% of Na2O; a main component of the second glass powder is a mixture of SiO2 and B2O3, the weight percentage of the mixture of SiO2 and B2O3 in the second glass powder is 98±1wt%, and the second glass powder also includes K2O and CaO, and the weight percentage of the mixture of K2O and CaO in the second glass powder is 2±1wt%.

[0013] Furthermore, in step S1: the main component of the water glass is Na2O·nSiO2, and the concentration is 12±2wt%.

[0014] Further, in step S1:

[0015] When the total mass of the first glass powder and the second glass powder is 100 kg, the mass of the first glass powder is 25±3 kg, and the mass of the second glass powder is 75±3 kg.

[0016] When the glass powder mixture is mixed in spring and autumn, the volume of the water glass is 65±3 mL, when the glass powder mixture is mixed on a sunny day in spring and autumn, the volume of the water is 120-150 mL, when the glass powder mixture is mixed on a cloudy day in spring and autumn, the volume of the water is 100-120 mL, and when the glass powder mixture is mixed on a rainy day in spring and autumn, the volume of the water is 70-100 mL;

[0017] When the glass powder mixture is mixed in summer, the volume of the water glass is 68±3 mL, when the glass powder mixture is mixed on a sunny day in summer, the volume of the water is 140-180 mL, when the glass powder mixture is mixed on a cloudy day in summer, the volume of the water is 110-140 mL, and when the glass powder mixture is mixed on a rainy day in summer, the volume of the water is 80-110 mL;

[0018] When mixing the glass powder mixture in winter, the volume of the water glass is 60±3mL, when mixing the glass powder mixture on a sunny day in winter, the volume of the water is 100-130mL, when mixing the glass powder mixture on a cloudy day in winter, the volume of the water is 80-120mL, and when mixing the glass powder mixture on a rainy day in winter, the volume of the water is 60-80mL.

[0019] Furthermore, step S3 is specifically as follows: putting the formed glass mat into an oven, heating the glass mat to 120±10° C. and keeping the temperature for 40±4 minutes, and then cooling the glass mat to room temperature.

[0020] Furthermore, in step S4, the temperature T of the drying room is greater than 30±2° C., and the humidity RH is less than or equal to 25±2% rh. During the moisture-proof treatment, the door of the drying room is locked tightly to ensure that the glass mat is in the enclosed space of the drying room.

[0021] Further, in step S2: the glass pad mold includes a glass pad outer mold and a glass pad core mold, a receiving cavity for receiving the glass pad core mold is provided in the middle of the glass pad outer mold, the glass pad core mold is fixed on the operating table, the glass pad outer mold is sleeved on the outside of the glass pad core mold, and a molding cavity of the glass pad is formed between the glass pad outer mold and the glass pad core mold.

[0022] Furthermore, the glass pad outer mold and the glass pad core mold have the same height. After the glass pad outer mold is sleeved on the outside of the glass pad core mold, the glass pad outer mold is flush with the top of the glass pad core mold, the inner wall of the bottom of the glass pad outer mold is in contact with the outer wall of the bottom of the glass pad core mold, the molding cavity is located at the upper part of the glass pad outer mold, and a vertical exhaust hole is provided in the middle of the glass pad core mold; the glass pad outer mold is a wooden mold, and the glass pad core mold is an iron mold.

[0023] Further,

[0024] Step S2 specifically includes: sleeve the glass mat outer mold on the outer side of the glass mat core mold, pour the glass powder mixture evenly into the molding cavity, tap and compact it with a mortar stick, and cover the top of the glass mat outer mold with a pad, so that the glass powder mixture is evenly molded in the molding cavity. After molding, the glass mat outer mold together with the pad is lifted up and turned over, and then the glass mat outer mold is removed to obtain a molded glass mat;

[0025] In step S3, the formed glass pad is flatly carried to an oven by the pad to be baked and solidified;

[0026] In step S4, the solidified glass mat is taken out through the pad, and the solidified glass mat is taken off the pad and transported to a drying room for moisture-proof treatment.

[0027] A method for applying a glass mat, wherein the glass mat prepared by the preparation method is used for hot extrusion production of titanium alloy steel pipes.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] In the present invention, since the glass powder mixture is obtained by uniformly mixing the first glass powder, the second glass powder, water glass and water in a set ratio, and the glass powder mixture is shaped by a glass mat mold to obtain a formed glass mat, the formed glass mat has excellent properties of high viscosity, high strength and low brittleness after baking, solidification and moisture-proof treatment. Therefore, there is no need to redetermine the preparation ratio of the first glass powder, the second glass powder, water glass and water, thereby effectively avoiding the waste of the first glass powder and the second glass powder raw materials, and greatly reducing cracking and damage during transportation and use. The prepared glass mat has a good heat insulation and protection effect on the extrusion mold during use, thereby increasing the service life of the extrusion mold, reducing the metal flow resistance during the hot extrusion molding of the steel pipe and improving the uniformity of the metal flow, thereby improving the surface quality and dimensional accuracy of the extruded steel pipe profile.

[0030] In the present invention, the main component of the first glass powder is a mixture of SiO2 and B2O3, the weight percentage of the mixture of SiO2 and B2O3 in the first glass powder is 96±2wt%, and the first glass powder further includes 4±2wt% of Na2O; the main component of the second glass powder is a mixture of SiO2 and B2O3, the weight percentage of the mixture of SiO2 and B2O3 in the second glass powder is 98±1wt%, and the second glass powder further includes K2O and CaO, the weight percentage of the mixture of K2O and CaO in the second glass powder is 2±1wt%; the main component of water glass is N a2O·nSiO2, and the concentration is 12±2wt%; when the total mass of the first glass powder and the second glass powder is 100kg, the mass of the first glass powder is 25±3kg, the mass of the second glass powder is 75±3kg, and when the glass powder mixture is mixed in spring and autumn, the volume of water glass is 65±3mL; when the glass powder mixture is mixed on a sunny day in spring and autumn, the volume of water is 120-150mL, when the glass powder mixture is mixed on a cloudy day in spring and autumn, the volume of water is 100-120mL, and when the glass powder mixture is mixed on a rainy day in spring and autumn, the volume of water is 70-100mL; in summer When mixing the glass powder mixture, the volume of water glass is 68±3mL. When mixing the glass powder mixture on a sunny day in summer, the volume of water is 140-180mL. When mixing the glass powder mixture on a cloudy day in summer, the volume of water is 110-140mL. When mixing the glass powder mixture on a rainy day in summer, the volume of water is 80-110mL. When mixing the glass powder mixture in winter, the volume of water glass is 60±3mL. When mixing the glass powder mixture on a sunny day in winter, the volume of water is 100-130mL. When mixing the glass powder mixture on a cloudy day in winter, the volume of water is 80-120mL. L, when mixing the glass powder mixture on a rainy day in winter, the volume of water is 60-80mL; in this way, by reasonably selecting the specifications of the first glass powder and the second glass powder, and by reasonably setting the mixing ratio of the first glass powder and the second glass powder, and after setting the mixing ratio of the first glass powder and the second glass powder, the volume of water glass is reasonably set according to the mixing season, and after setting the volume of water glass, the volume of water is reasonably set according to the weather conditions during mixing, so that the mixed glass powder mixture has excellent properties, thereby making the prepared glass mat have excellent properties of high viscosity, high strength and low brittleness.

[0031] In the present invention, step S3 is specifically as follows: placing the formed glass mat into an oven, heating the glass mat to 120±10°C and keeping it warm for 40±4 minutes, and then cooling it to room temperature with the oven; in this way, by reasonably setting the baking temperature and insulation time in the oven, the strength of the baked and solidified glass mat can be made higher.

[0032] In the present invention, in step S4, the temperature T of the drying room is greater than 30±2°C, and the humidity RH is less than or equal to 25±2% rh. During the moisture-proof treatment process, the door lock of the drying room is tightly closed to ensure that the glass mat is in the enclosed space of the drying room. In this way, by reasonably setting the temperature and humidity in the drying room, the storage time of the glass mat in a state of use after solidification can be extended, and the moisture-proof treated glass mat will not absorb moisture and disintegrate, and will not cause damage.

[0033] In summary, the glass mats made according to the method of the present invention can greatly reduce cracking and damage during transportation and use, and the qualified rate of the glass mats is increased from the original 80% to 95%. The glass mats play a good role in heat insulation and protection for the extrusion mold during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the main structure of the glass mat outer mold;

[0035] Figure 2 for Figure 1 A schematic diagram of a top view structure;

[0036] Figure 3 This is a schematic diagram of the main structure of the glass mat core mold;

[0037] Figure 4 It is a schematic diagram of the main structure of the formed glass mat;

[0038] Figure 5 for Figure 4 A schematic diagram of a top view structure;

[0039] Figure 6 It is a process diagram of baking and solidification in a specific embodiment;

[0040] Figure 7 It is a process diagram of moisture-proof treatment in a specific embodiment.

[0041] Explanation of the reference numerals in the figure: 1. glass pad outer mold, 1.1. containing cavity, 2. glass pad core mold, 2.1. exhaust hole, 3. molding cavity, 4. handle, 5. glass pad. DETAILED DESCRIPTION

[0042] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, but not to limit the present invention.

[0043] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0044] A method for manufacturing a glass mat for hot extrusion of a steel pipe comprises the following steps:

[0045] S1, powder mixing: uniformly mixing the first glass powder, the second glass powder, water glass and water according to a set ratio to obtain a glass powder mixture;

[0046] S2, shaping: pouring the glass powder mixture into a glass mat mold, and removing the glass mat mold after the glass powder mixture is evenly shaped in the glass mat mold to obtain a shaped glass mat 5;

[0047] S3, baking and solidification: the formed glass mat 5 is placed in an oven, the glass mat 5 is heated to 120±10°C and kept warm for 40±4 minutes, and then cooled to room temperature, so that the formed glass mat 5 is baked and solidified; by reasonably setting the baking temperature and the holding time in the oven, the strength of the baked and solidified glass mat 5 can be made higher;

[0048] S4, moisture-proof: take out the solidified glass mat 5 and put it into a drying room for moisture-proof treatment, wherein the temperature T of the drying room is greater than 30±2°C, and the humidity RH is less than or equal to 25±2% rh. During the moisture-proof treatment, the door lock of the drying room is tightly closed to ensure that the glass mat 5 is in the enclosed space of the drying room. In this way, by reasonably setting the temperature and humidity in the drying room, the storage time of the glass mat 5 in a state of use after solidification can be extended, and the moisture-proof treated glass mat 5 will not absorb moisture and disintegrate, and will not cause damage.

[0049] In the present invention, since the glass powder mixture is obtained by uniformly mixing the first glass powder, the second glass powder, water glass and water in a set ratio, and the glass powder mixture is formed by a glass mat mold to obtain a formed glass mat 5, the formed glass mat 5 has excellent properties of high viscosity, high strength and low brittleness after baking, solidification and moisture-proof treatment. Therefore, there is no need to redetermine the preparation ratio of the first glass powder, the second glass powder, water glass and water, thereby effectively avoiding the waste of the first glass powder and the second glass powder raw materials, and greatly reducing cracking and damage during transportation and use. The prepared glass mat 5 has a good heat insulation and protection effect on the extrusion mold during use, thereby increasing the service life of the extrusion mold, reducing the metal flow resistance during the hot extrusion molding of the steel pipe, and improving the uniformity of the metal flow, thereby improving the surface quality and dimensional accuracy of the extruded steel pipe profile.

[0050] Wherein, in step S1: the main component of the first glass powder is a mixture of SiO2 and B2O3, the weight percentage of the mixture of SiO2 and B2O3 in the first glass powder is 96±2wt%, and the first glass powder also includes 4±2wt% of Na2O; the main component of the second glass powder is a mixture of SiO2 and B2O3, the weight percentage of the mixture of SiO2 and B2O3 in the second glass powder is 98±1wt%, and the second glass powder also includes K2O and CaO, and the weight percentage of the mixture of K2O and CaO in the second glass powder is 2±1wt%; the main component of water glass is Na2O·nSiO2, and the concentration is 12±2wt%;

[0051] When the total mass of the first glass powder and the second glass powder is 100 kg, the mass of the first glass powder is 25±3 kg, and the mass of the second glass powder is 75±3 kg.

[0052] When mixing the glass powder mixture in spring and autumn, the volume of water glass is 65±3mL, when mixing the glass powder mixture on a sunny day in spring and autumn, the volume of water is 120-150mL, when mixing the glass powder mixture on a cloudy day in spring and autumn, the volume of water is 100-120mL, and when mixing the glass powder mixture on a rainy day in spring and autumn, the volume of water is 70-100mL;

[0053] When mixing the glass powder mixture in summer, the volume of water glass is 68±3mL, when mixing the glass powder mixture on a sunny day in summer, the volume of water is 140-180mL, when mixing the glass powder mixture on a cloudy day in summer, the volume of water is 110-140mL, and when mixing the glass powder mixture on a rainy day in summer, the volume of water is 80-110mL;

[0054] When mixing the glass powder mixture in winter, the volume of water glass is 60±3mL, when mixing the glass powder mixture on a sunny day in winter, the volume of water is 100-130mL, when mixing the glass powder mixture on a cloudy day in winter, the volume of water is 80-120mL, and when mixing the glass powder mixture on a rainy day in winter, the volume of water is 60-80mL.

[0055] In this way, by reasonably selecting the specifications of the first glass powder and the second glass powder, and by reasonably setting the mixing ratio of the first glass powder and the second glass powder, and after setting the mixing ratio of the first glass powder and the second glass powder, reasonably setting the volume of water glass according to the mixing season, and after setting the volume of water glass, reasonably setting the volume of water according to the weather conditions during mixing, the mixed glass powder mixture has excellent properties, and the prepared glass mat 5 has excellent properties of high viscosity, high strength and low brittleness.

[0056] in,

[0057] In step S2: Figure 1-3 As shown, the glass pad mold comprises a glass pad outer mold 1 and a glass pad core mold 2 of the same height, the glass pad outer mold 1 is a wooden mold, the glass pad core mold 2 is an iron mold, a receiving cavity 1.1 for receiving the glass pad core mold 2 is provided in the middle of the glass pad outer mold 1, the glass pad core mold 2 is fixed on the operating table, the glass pad outer mold 1 is sleeved on the outside of the glass pad core mold 2, and a molding cavity 3 for a glass pad 5 is formed between the glass pad outer mold 1 and the glass pad core mold 2; after the glass pad outer mold 1 is sleeved on the outside of the glass pad core mold 2, the glass pad outer mold 1 is flush with the top of the glass pad core mold 2, the inner side wall of the bottom of the glass pad outer mold 1 is fitted with the outer side wall of the bottom of the glass pad core mold 2, the molding cavity 3 is located at the upper part of the glass pad outer mold 1, and a vertical exhaust through hole 2.1 is provided in the middle of the glass pad core mold 2; a plurality of handles 4 are provided on the outer side wall of the glass pad outer mold 1;

[0058] Step S2 specifically includes: using the handle 4 to sleeve the glass mat outer mold 1 on the outer side of the glass mat core mold 2, pouring the glass powder mixture evenly into the molding cavity 3, tapping and compacting with a mortar stick, and covering the top of the glass mat outer mold 1 with a pad, and the glass powder mixture is evenly molded in the molding cavity 3. After molding, the glass mat outer mold 1 and the pad are lifted up and turned over by the handle 4, and then the glass mat outer mold 1 is removed to obtain a molded glass mat 5, the inner diameter of the glass mat is 130-360 mm, see Figure 4 and 5 ;

[0059] In step S3, the formed glass pad 5 is carried to an oven by a pad to be baked and solidified; thus, the formed glass pad 5 is carried by the pad to prevent the formed glass pad 5 from being damaged before being baked and solidified;

[0060] In step S4, the solidified glass mat 5 is taken out through the pad, and the solidified glass mat 5 is taken off the pad and transported to a drying room for moisture-proof treatment.

[0061] A method for applying a glass mat, wherein the glass mat prepared by the preparation method is used for hot extrusion production of titanium alloy steel pipes. Specific embodiments

[0063] A method for manufacturing a glass mat for hot extrusion of a steel pipe comprises the following steps:

[0064] S1. Powder mixing: adding the first glass powder, the second glass powder, water glass and water into a mixer according to a set ratio, and mixing them evenly to obtain a glass powder mixture.

[0065] The main component of the first glass powder is a mixture of SiO2 and B2O3, the weight percentage of the mixture of SiO2 and B2O3 in the first glass powder is 96wt%, and the first glass powder further includes 4wt% of Na2O; the main component of the second glass powder is a mixture of SiO2 and B2O3, the weight percentage of the mixture of SiO2 and B2O3 in the second glass powder is 98wt%, and the second glass powder further includes K2O and CaO, the weight percentage of the mixture of K2O and CaO in the second glass powder is 2wt%; the main component of water glass is Na2O·nSiO2, and the concentration is 12wt%;

[0066] When the total mass of the first glass powder and the second glass powder is 100 kg, the mass of the first glass powder is 25 kg, and the mass of the second glass powder is 75 kg.

[0067] When mixing the glass powder mixture in spring and autumn, the volume of water glass is 65mL, when mixing the glass powder mixture on a sunny day in spring and autumn, the volume of water is 120-150mL, when mixing the glass powder mixture on a cloudy day in spring and autumn, the volume of water is 100-120mL, and when mixing the glass powder mixture on a rainy day in spring and autumn, the volume of water is 70-100mL;

[0068] When mixing the glass powder mixture in summer, the volume of water glass is 68 mL, when mixing the glass powder mixture on a sunny day in summer, the volume of water is 140-180 mL, when mixing the glass powder mixture on a cloudy day in summer, the volume of water is 110-140 mL, and when mixing the glass powder mixture on a rainy day in summer, the volume of water is 80-110 mL;

[0069] When mixing the glass powder mixture in winter, the volume of water glass is 60 mL, when mixing the glass powder mixture on a sunny day in winter, the volume of water is 100-130 mL, when mixing the glass powder mixture on a cloudy day in winter, the volume of water is 80-120 mL, and when mixing the glass powder mixture on a rainy day in winter, the volume of water is 60-80 mL;

[0070] The specific mixing ratio of each raw material in the glass powder mixture is shown in Table 1.

[0071] Table 1 Mixing ratio of each raw material in the glass powder mixture The total mass of the first glass powder and the second glass powder is 100 kg

[0072]

[0073] S2, molding: The glass mat outer mold 1 is placed on the outside of the glass mat core mold 2 by means of the handle 4, the glass powder mixture is evenly poured into the molding cavity 3, and the mixture is compacted by means of a pounding sand rod, and a pad is placed on the top of the glass mat outer mold 1. The glass powder mixture is evenly molded in the molding cavity 3. After molding, the glass mat outer mold 1 together with the pad is lifted up and turned over by means of the handle 4, and then the glass mat outer mold 1 is removed to obtain a molded glass mat 5. Figure 4 and 5 ,;

[0074] S3, baking and solidification: The formed glass mat 5 is carried flat by the pad to the oven for baking and solidification. The oven temperature is adjusted to 120°C first, and the heating power is turned off after heating. After keeping warm for 40 minutes, the oven power is turned off, and then the oven is cooled to room temperature with the furnace. The baking and solidification process is shown in FIG. Figure 6 ;

[0075] S4, moisture-proof: After cooling, the solidified glass mat 5 is taken out through the pad, and the solidified glass mat 5 is taken out from the pad and transported to the drying room for moisture-proof treatment, wherein the temperature T of the drying room is greater than 30°C, and the humidity RH is less than or equal to 25% rh. During the moisture-proof treatment, the door lock of the drying room is tightly closed to ensure that the glass mat 5 is in the enclosed space of the drying room. The process of moisture-proof treatment is shown in Figure 7 .

[0076] In summary, the present invention reasonably selects the specifications of the first glass powder and the second glass powder, reasonably sets the mixing ratio of the first glass powder and the second glass powder, and after setting the mixing ratio of the first glass powder and the second glass powder, reasonably sets the volume of water glass according to the mixing season, and after setting the volume of water glass, reasonably sets the volume of water according to the weather conditions during mixing, so that the mixed glass powder mixture has excellent properties, and then the prepared glass mat 5 has the excellent properties of high viscosity, high strength and low brittleness, ensuring the smooth operation of the steel pipe hot extrusion production line, and because there is no need to redefine the mixing ratio of the first glass powder, the second glass powder, water glass and water, the waste of the first glass powder and the second glass powder raw materials can be effectively avoided; the present invention forms a complete set of processes for the production of glass mats 5, which can provide technical guidance for staff and improve the production efficiency of glass mats 5; the glass mats 5 produced by the above method can greatly reduce cracking and damage during transportation and use, and the qualified rate of the glass mats 5 is increased from the original 80% to 95%, which plays a good role in heat insulation and protection for the extrusion mold during use; and the reasonable moisture-proof process extends the service life of the glass mats 5.

[0077] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A method for manufacturing a glass mat for hot extrusion of a steel pipe, characterized in that The following steps are involved: S1, powder mixing: uniformly mixing the first glass powder, the second glass powder, water glass and water according to a set ratio to obtain a glass powder mixture; S2, shaping: pouring the glass powder mixture into a glass mat mold, and removing the glass mat mold after the glass powder mixture is evenly shaped in the glass mat mold to obtain a shaped glass mat (5); S3, baking and solidifying: placing the formed glass mat (5) in an oven, heating and keeping it warm for a period of time, and then cooling it to room temperature with the oven, so that the formed glass mat (5) is baked and solidified; S4, moisture-proof: taking out the solidified glass mat (5) and putting it into a drying room for moisture-proof treatment; In step S1: the main component of the first glass powder is a mixture of SiO2 and B2O3, the weight percentage of the mixture of SiO2 and B2O3 in the first glass powder is 96±2wt%, and the first glass powder further includes 4±2wt% of Na2O; the main component of the second glass powder is a mixture of SiO2 and B2O3, the weight percentage of the mixture of SiO2 and B2O3 in the second glass powder is 98±1wt%, and the second glass powder further includes K2O and CaO, and the weight percentage of the mixture of K2O and CaO in the second glass powder is 2±1wt%; The main component of the water glass is Na2O·nSiO2, and the concentration is 12±2wt%; When the total mass of the first glass powder and the second glass powder is 100 kg, the mass of the first glass powder is 25±3 kg, and the mass of the second glass powder is 75±3 kg. When the glass powder mixture is mixed in spring and autumn, the volume of the water glass is 65±3 mL, when the glass powder mixture is mixed on a sunny day in spring and autumn, the volume of the water is 120-150 mL, when the glass powder mixture is mixed on a cloudy day in spring and autumn, the volume of the water is 100-120 mL, and when the glass powder mixture is mixed on a rainy day in spring and autumn, the volume of the water is 70-100 mL; When the glass powder mixture is mixed in summer, the volume of the water glass is 68±3 mL, when the glass powder mixture is mixed on a sunny day in summer, the volume of the water is 140-180 mL, when the glass powder mixture is mixed on a cloudy day in summer, the volume of the water is 110-140 mL, and when the glass powder mixture is mixed on a rainy day in summer, the volume of the water is 80-110 mL; When mixing the glass powder mixture in winter, the volume of the water glass is 60±3mL, when mixing the glass powder mixture on a sunny day in winter, the volume of the water is 100-130mL, when mixing the glass powder mixture on a cloudy day in winter, the volume of the water is 80-120mL, and when mixing the glass powder mixture on a rainy day in winter, the volume of the water is 60-80mL.

2. The method for manufacturing a glass mat for hot extrusion of a steel pipe according to claim 1, characterized in that: Step S3 specifically includes: placing the formed glass mat (5) into an oven, heating the glass mat (5) to 120±10° C. and keeping the temperature for 40±4 minutes, and then cooling the glass mat to room temperature.

3. The method for manufacturing a glass mat for hot extrusion of a steel pipe according to claim 1, characterized in that: In step S4, the temperature T of the drying room is greater than 30±2° C., and the humidity RH is less than or equal to 25±2% rh. During the moisture-proof treatment process, the door of the drying room is locked tightly to ensure that the glass mat (5) is in the enclosed space of the drying room.

4. The method for manufacturing a glass mat for hot extrusion of a steel pipe according to claim 1, characterized in that: In step S2: the glass pad (5) mold comprises a glass pad outer mold (1) and a glass pad core mold (2); a receiving cavity (1.1) for receiving the glass pad core mold (2) is provided in the middle of the glass pad outer mold (1); the glass pad core mold (2) is fixed on an operating table; the glass pad outer mold (1) is sleeved on the outside of the glass pad core mold (2); a molding cavity (3) of the glass pad (5) is formed between the glass pad outer mold (1) and the glass pad core mold (2).

5. The method for manufacturing a glass mat for hot extrusion of a steel pipe according to claim 4, characterized in that: The glass pad outer mold (1) and the glass pad core mold (2) have the same height. After the glass pad outer mold (1) is sleeved on the outside of the glass pad core mold (2), the tops of the glass pad outer mold (1) and the glass pad core mold (2) are flush, the bottom inner wall of the glass pad outer mold (1) is in contact with the bottom outer wall of the glass pad core mold (2), the molding cavity (3) is located at the top of the glass pad outer mold (1), and a vertical exhaust hole (2.1) is provided in the middle of the glass pad core mold (2); the glass pad outer mold (1) is a wooden mold, and the glass pad core mold (2) is an iron mold.

6. The method for manufacturing a glass mat for hot extrusion of a steel pipe according to claim 4, characterized in that: Step S2 specifically comprises: sleeve-mounting the glass mat outer mold (1) on the outer side of the glass mat core mold (2), uniformly pouring the glass powder mixture into the molding cavity (3), tapping and compacting with a mortar stick, and covering the top end of the glass mat outer mold (1) with a pad, so that the glass powder mixture is uniformly molded in the molding cavity (3), and after molding, lifting the glass mat outer mold (1) together with the pad upwards and turning over, and then removing the glass mat outer mold (1) to obtain a molded glass mat (5); In step S3, the formed glass mat (5) is carried flat by the pad to an oven for baking and solidification; In step S4, the solidified glass mat (5) is taken out through the pad, and the solidified glass mat (5) is removed from the pad and transported to a drying room for moisture-proof treatment.

7. A method for applying a glass mat, characterized in that: The glass mat produced by the production method described in any one of claims 1 to 6 is used for hot extrusion production of titanium alloy steel pipes.

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