CN113351676B - Method for controlling tissue performance and size uniformity of wide-width integral extruded wallboard and rolled plate - Google Patents
Method for controlling tissue performance and size uniformity of wide-width integral extruded wallboard and rolled plate Download PDFInfo
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- CN113351676B CN113351676B CN202110641846.3A CN202110641846A CN113351676B CN 113351676 B CN113351676 B CN 113351676B CN 202110641846 A CN202110641846 A CN 202110641846A CN 113351676 B CN113351676 B CN 113351676B
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- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000001125 extrusion Methods 0.000 claims abstract description 34
- 238000001816 cooling Methods 0.000 claims description 46
- 239000011521 glass Substances 0.000 claims description 40
- 238000010438 heat treatment Methods 0.000 claims description 38
- 238000005242 forging Methods 0.000 claims description 37
- 238000003825 pressing Methods 0.000 claims description 28
- 238000004321 preservation Methods 0.000 claims description 23
- 230000008569 process Effects 0.000 claims description 22
- 230000001276 controlling effect Effects 0.000 claims description 21
- 239000000843 powder Substances 0.000 claims description 15
- 230000006835 compression Effects 0.000 claims description 13
- 238000007906 compression Methods 0.000 claims description 13
- 238000005496 tempering Methods 0.000 claims description 12
- 238000003723 Smelting Methods 0.000 claims description 10
- 239000000956 alloy Substances 0.000 claims description 10
- 229910045601 alloy Inorganic materials 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 238000005461 lubrication Methods 0.000 claims description 10
- 238000010791 quenching Methods 0.000 claims description 9
- 230000000171 quenching effect Effects 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000000137 annealing Methods 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000003892 spreading Methods 0.000 claims description 5
- 230000007480 spreading Effects 0.000 claims description 5
- 239000002918 waste heat Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 4
- 230000000630 rising effect Effects 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 5
- 230000008520 organization Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J3/00—Lubricating during forging or pressing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- 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
- C21D1/26—Methods of annealing
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
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- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
- Forging (AREA)
Abstract
The invention discloses a control method for tissue performance and size uniformity of a broad-width integral extrusion wallboard and a rolled board, and particularly relates to the technical field of extrusion deformation.
Description
Technical Field
The invention relates to the technical field of extrusion deformation, in particular to a method for controlling tissue performance and size uniformity of a wide integral extrusion wallboard and a rolled plate.
Background
Extrusion technology has become an extremely important means for plastic forming processing of metals in the departments of machinery, automobiles, astronavigation, aviation, military industry, electric appliances and the like as an efficient, high-quality and low-consumption small-chip-free processing technology, and the wall plate extrusion technology in the prior art has some problems: for example, the structural performance of the wallboard cannot be improved before the wallboard is extruded, the uniformity of the size of the wallboard after the wallboard is extruded is not ideal, and the temperature of the wallboard is reduced along with the time in the extrusion process, so that the temperature change in the whole extrusion process easily affects the extrusion quality of the wallboard, and therefore, the research on a wide-width integral extrusion wallboard and a rolled plate structural performance and size uniformity control method is of great significance for solving the problems.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a control method for tissue performance and size uniformity of a wide-width integral extruded wallboard and a rolled plate, and the technical problems to be solved by the invention are as follows: the wall plate extrusion technology in the prior art has some problems: for example, the structural property of the wall plate cannot be improved before the wall plate is extruded, the uniformity of the size of the wall plate is not ideal after the wall plate is extruded, and the temperature of the wall plate is reduced along with the time in the extrusion process, so that the temperature change in the whole extrusion process easily affects the extrusion quality of the wall plate.
In order to achieve the above purpose, the present invention provides the following technical solutions: the method for controlling the tissue performance and the size uniformity of the wide integral extruded wallboard and the rolled plate comprises the following steps:
firstly, selecting a TA15 alloy plate as a blank, smelting according to a conventional process, simultaneously heating a heat treatment furnace, preheating, placing the treated blank in a treatment furnace at 1000-1200 ℃ for uniform organization treatment after smelting, preserving heat for 18-24 hours at the temperature, slowly cooling, heating to 1200-1300 ℃, forging, firstly carrying out 45-degree opposite pressing on the blank, respectively compressing once according to the directions of a X, Y shaft and a Z shaft, respectively carrying out five-time drawing treatment after compression, repeatedly folding and forging the blank after each drawing, carrying out 45-degree opposite pressing again after the treatment, carrying out furnace return heat preservation, controlling the temperature at 950-1000 ℃ for 3-5 hours, and then repeating the steps of compression, drawing and forging, wherein the finish forging temperature is more than or equal to 750 ℃, thereby obtaining the pretreated section.
And step two, returning the obtained pretreated section to the furnace again for heat preservation, wherein the temperature is reduced by 100-200 ℃, the heat preservation time is unchanged, then cooling is carried out, annealing is carried out at 850-900 ℃, then heating to 1000-1100 ℃ by adopting a hood-type resistance heating furnace, heat preservation is carried out for 6-12 hours, quenching is carried out, then primary tempering is carried out at 550-600 ℃, secondary tempering is carried out at 600-650 ℃, the temperature rising speed during tempering is also controlled within the range of 60-100 ℃/h, the heat preservation time is controlled within 8-14 hours, the structure is refined by double refinement treatment, the size of carbide particles is controlled, and the structure performance and the size uniformity are improved.
Step three, carrying out gradient heating on the section bar obtained in the step two, then adjusting the temperature range of a film outlet hole of the section bar to 750-850 ℃, inputting the section bar into the film outlet hole from one end with lower temperature for extrusion, detecting the temperature near the film outlet hole, adopting air cooling or water cooling for cooling treatment when the temperature near the film outlet hole is more than 850 ℃, and carrying out heating treatment on the section bar by using a heating device when the temperature near the film outlet hole is less than 750 ℃, so that the contact position of the section bar and the film outlet hole can be kept between 750-850 ℃ all the time, and extruding the cylindrical section bar.
And fourthly, performing physical treatment on the cylindrical section by utilizing an involute principle after the cylindrical section is extruded, so that the cylindrical section can be unfolded, performing finishing treatment on the cylindrical section, extruding the cylindrical section by utilizing waste heat of the cylindrical section by utilizing two layers of rollers, uniformly spreading the cylindrical section, and performing on-line forced air cooling and water cooling quenching after the rollers are extruded to enable the cylindrical section to be rapidly cooled, thereby obtaining the wide wallboard.
As a further aspect of the invention: and in the fourth step, the cooling speed is not less than 60 ℃/min, and the speed can refine the internal structure of the forging piece and improve the performance of the forging piece.
As a further aspect of the invention: the TA15 alloy plate comprises the components of Al6.7, zr2.0, mo1.7 and V2.2, and the balance of Ti and unavoidable impurities.
As a further aspect of the invention: in the pressing process of the 45-degree angle in the first step, the pressing amount is controlled to be 15-30% each time, the pressing amount of the first step which is compressed according to the directions of the X, Y axis and the Z axis is controlled to be 40-60% each time, and the pressing amount of the first step which is the pulling and processing is controlled to be 25-35%.
As a further aspect of the invention: the cooling speed in the first step is controlled to be 5-20 ℃/min, and the cooling speed can refine the internal structure of the forging piece and improve the performance of the forging piece.
As a further aspect of the invention: the finishing treatment in the step four mainly comprises sawing head and tail and straightening treatment processes.
As a further aspect of the invention: the granularity of the external coating glass powder used for lubrication between the outer surface of the cylindrical section and the extrusion cylinder in the extrusion process of the step four is 130-150 meshes, the thickness of the glass film is 0.4-0.5 mm, the granularity of the internal coating glass powder used for lubrication between the inner surface of the cylindrical section and the outer surface of the core rod is 80-100 meshes, the thickness of the glass film is 0.3-0.4 mm, a glass cushion is adopted between the cylindrical section and the outlet die, the granularity of the glass powder for manufacturing the glass cushion is 100-120 meshes, and the thickness of the glass cushion is uniform.
As a further aspect of the invention: and in the third step, when the section bar is subjected to gradient heating, the temperature difference between two ends of the section bar is controlled to be 60-100 ℃.
The invention has the beneficial effects that:
1. according to the invention, the blank of the plate is smelted before the plate is extruded, the blank is processed through compression, drawing and forging processing technologies, then the blank is subjected to furnace return heat preservation by controlling the temperature so as to improve the organization performance and the size uniformity of the blank, finally the obtained plate is subjected to gradient heating, the film outlet holes are input from one end with lower temperature of the section bar for extrusion, and meanwhile, the temperature near the film outlet holes is detected and regulated, so that the contact position of the section bar and the film outlet holes can be always kept in a temperature range, the organization performance and the size uniformity of the wall plate can be improved before the wall plate extrusion, and the contact position temperature of the wall plate and the film outlet holes can be kept in the wall plate extrusion process, so that the negative influence of the wall plate extrusion caused by the wall plate temperature change in the extrusion process can be avoided.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1:
the method for controlling the tissue performance and the size uniformity of the wide integral extruded wallboard and the rolled plate comprises the following steps:
firstly, selecting a TA15 alloy plate as a blank, smelting according to a conventional process, simultaneously heating a furnace for preheating, and after smelting, placing the treated blank in a treatment furnace at 1000-1200 ℃ for uniform tissue treatment to obtain a pretreated section.
And step two, returning the obtained pretreated section to the furnace again for heat preservation, wherein the temperature is reduced by 100-200 ℃, the heat preservation time is unchanged, then cooling is carried out, annealing is carried out at 850-900 ℃, then heating to 1000-1100 ℃ by adopting a hood-type resistance heating furnace, heat preservation is carried out for 6-12 hours, quenching is carried out, then primary tempering is carried out at 550-600 ℃, secondary tempering is carried out at 600-650 ℃, the temperature rising speed during tempering is also controlled within the range of 60-100 ℃/h, the heat preservation time is controlled within 8-14 hours, the structure is refined by double refinement treatment, the size of carbide particles is controlled, and the structure performance and the size uniformity are improved.
Step three, carrying out gradient heating on the section bar obtained in the step two, then adjusting the temperature range of a film outlet hole of the section bar to 750-850 ℃, inputting the section bar into the film outlet hole from one end with lower temperature for extrusion, detecting the temperature near the film outlet hole, adopting air cooling or water cooling for cooling treatment when the temperature near the film outlet hole is more than 850 ℃, and carrying out heating treatment on the section bar by using a heating device when the temperature near the film outlet hole is less than 750 ℃, so that the contact position of the section bar and the film outlet hole can be kept between 750-850 ℃ all the time, and extruding the cylindrical section bar.
And fourthly, performing physical treatment on the cylindrical section by utilizing an involute principle after the cylindrical section is extruded, so that the cylindrical section can be unfolded, performing finishing treatment on the cylindrical section, extruding the cylindrical section by utilizing waste heat of the cylindrical section by utilizing two layers of rollers, uniformly spreading the cylindrical section, and performing on-line forced air cooling and water cooling quenching after the rollers are extruded to enable the cylindrical section to be rapidly cooled, thereby obtaining the wide wallboard.
And step four, the cooling speed is not less than 60 ℃/min, and the speed can refine the internal structure of the forging piece and improve the performance of the forging piece.
The TA15 alloy plate comprises the components of Al6.7, zr2.0, mo1.7 and V2.2, and the balance of Ti and unavoidable impurities.
In the pressing process of the 45-degree angle in the first step, the pressing amount is controlled to be 15-30% each time, the pressing amount of the first step for compression is controlled to be 40-60% according to the directions of the X, Y axis and the Z axis respectively, and the pressing amount of the first step for pulling and processing is controlled to be 25-35%.
The cooling speed in the first step is controlled between 5-20 ℃/min, and the cooling speed can refine the internal structure of the forging piece and improve the performance of the forging piece.
The finishing treatment in the fourth step mainly comprises sawing head and tail and straightening treatment.
In the extrusion process of the fourth step, the granularity of the external coating glass powder used for lubrication between the outer surface of the cylindrical section and the extrusion cylinder is 130-150 meshes, the thickness of the glass film is 0.4-0.5 mm, the granularity of the internal coating glass powder used for lubrication between the inner surface of the cylindrical section and the outer surface of the core rod is 80-100 meshes, the thickness of the glass film is 0.3-0.4 mm, a glass cushion is adopted between the cylindrical section and the outlet die, the granularity of the glass powder for manufacturing the glass cushion is 100-120 meshes, and the thickness of the glass cushion is uniform.
And step three, controlling the temperature difference between two ends of the profile to be 60-100 ℃ when the profile is subjected to gradient heating.
Example 2:
the method for controlling the tissue performance and the size uniformity of the wide integral extruded wallboard and the rolled plate comprises the following steps:
firstly, selecting a TA15 alloy plate as a blank, smelting according to a conventional process, simultaneously heating a heat treatment furnace, preheating, placing the treated blank in a treatment furnace at 1000-1200 ℃ for uniform organization treatment after smelting, preserving heat for 18-24 hours at the temperature, slowly cooling, heating to 1200-1300 ℃, forging, firstly carrying out 45-degree opposite pressing on the blank, respectively compressing once according to the directions of a X, Y shaft and a Z shaft, respectively carrying out five-time drawing treatment after compression, repeatedly folding and forging the blank after each drawing, carrying out 45-degree opposite pressing again after the treatment, carrying out furnace return heat preservation, controlling the temperature at 950-1000 ℃ for 3-5 hours, and then repeating the steps of compression, drawing and forging, wherein the finish forging temperature is more than or equal to 750 ℃, thereby obtaining the pretreated section.
And step two, returning the obtained pretreated section to the furnace again for heat preservation, wherein the temperature is reduced by 100-200 ℃, the heat preservation time is unchanged, then cooling, and annealing at 850-900 ℃ for 40 min.
Step three, carrying out gradient heating on the section bar obtained in the step two, then adjusting the temperature range of a film outlet hole of the section bar to 750-850 ℃, inputting the section bar into the film outlet hole from one end with lower temperature for extrusion, detecting the temperature near the film outlet hole, adopting air cooling or water cooling for cooling treatment when the temperature near the film outlet hole is more than 850 ℃, and carrying out heating treatment on the section bar by using a heating device when the temperature near the film outlet hole is less than 750 ℃, so that the contact position of the section bar and the film outlet hole can be kept between 750-850 ℃ all the time, and extruding the cylindrical section bar.
And fourthly, performing physical treatment on the cylindrical section by utilizing an involute principle after the cylindrical section is extruded, so that the cylindrical section can be unfolded, performing finishing treatment on the cylindrical section, extruding the cylindrical section by utilizing waste heat of the cylindrical section by utilizing two layers of rollers, uniformly spreading the cylindrical section, and performing on-line forced air cooling and water cooling quenching after the rollers are extruded to enable the cylindrical section to be rapidly cooled, thereby obtaining the wide wallboard.
And step four, the cooling speed is not less than 60 ℃/min, and the speed can refine the internal structure of the forging piece and improve the performance of the forging piece.
The TA15 alloy plate comprises the components of Al6.7, zr2.0, mo1.7 and V2.2, and the balance of Ti and unavoidable impurities.
In the pressing process of the 45-degree angle in the first step, the pressing amount is controlled to be 15-30% each time, the pressing amount of the first step for compression is controlled to be 40-60% according to the directions of the X, Y axis and the Z axis respectively, and the pressing amount of the first step for pulling and processing is controlled to be 25-35%.
The cooling speed in the first step is controlled between 5-20 ℃/min, and the cooling speed can refine the internal structure of the forging piece and improve the performance of the forging piece.
The finishing treatment in the fourth step mainly comprises sawing head and tail and straightening treatment.
In the extrusion process of the fourth step, the granularity of the external coating glass powder used for lubrication between the outer surface of the cylindrical section and the extrusion cylinder is 130-150 meshes, the thickness of the glass film is 0.4-0.5 mm, the granularity of the internal coating glass powder used for lubrication between the inner surface of the cylindrical section and the outer surface of the core rod is 80-100 meshes, the thickness of the glass film is 0.3-0.4 mm, a glass cushion is adopted between the cylindrical section and the outlet die, the granularity of the glass powder for manufacturing the glass cushion is 100-120 meshes, and the thickness of the glass cushion is uniform.
And step three, controlling the temperature difference between two ends of the profile to be 60-100 ℃ when the profile is subjected to gradient heating.
Example 3:
the method for controlling the tissue performance and the size uniformity of the wide integral extruded wallboard and the rolled plate comprises the following steps:
firstly, selecting a TA15 alloy plate as a blank, smelting according to a conventional process, simultaneously heating a heat treatment furnace, preheating, placing the treated blank in a treatment furnace at 1000-1200 ℃ for uniform organization treatment after smelting, preserving heat for 18-24 hours at the temperature, slowly cooling, heating to 1200-1300 ℃, forging, firstly carrying out 45-degree opposite pressing on the blank, respectively compressing once according to the directions of a X, Y shaft and a Z shaft, respectively carrying out five-time drawing treatment after compression, repeatedly folding and forging the blank after each drawing, carrying out 45-degree opposite pressing again after the treatment, carrying out furnace return heat preservation, controlling the temperature at 950-1000 ℃ for 3-5 hours, and then repeating the steps of compression, drawing and forging, wherein the finish forging temperature is more than or equal to 750 ℃, thereby obtaining the pretreated section.
And step two, returning the obtained pretreated section to the furnace again for heat preservation, wherein the temperature is reduced by 100-200 ℃, the heat preservation time is unchanged, then cooling is carried out, annealing is carried out at 850-900 ℃, then heating to 1000-1100 ℃ by adopting a hood-type resistance heating furnace, heat preservation is carried out for 6-12 hours, quenching is carried out, then primary tempering is carried out at 550-600 ℃, secondary tempering is carried out at 600-650 ℃, the temperature rising speed during tempering is also controlled within the range of 60-100 ℃/h, the heat preservation time is controlled within 8-14 hours, the structure is refined by double refinement treatment, the size of carbide particles is controlled, and the structure performance and the size uniformity are improved.
And thirdly, heating the section bar obtained in the second step, adjusting the temperature range of the film outlet hole of the section bar to 750-850 ℃, extruding, and extruding the cylindrical section bar.
And fourthly, performing physical treatment on the cylindrical section by utilizing an involute principle after the cylindrical section is extruded, so that the cylindrical section can be unfolded, performing finishing treatment on the cylindrical section, extruding the cylindrical section by utilizing waste heat of the cylindrical section by utilizing two layers of rollers, uniformly spreading the cylindrical section, and performing on-line forced air cooling and water cooling quenching after the rollers are extruded to enable the cylindrical section to be rapidly cooled, thereby obtaining the wide wallboard.
And step four, the cooling speed is not less than 60 ℃/min, and the speed can refine the internal structure of the forging piece and improve the performance of the forging piece.
The TA15 alloy plate comprises the components of Al6.7, zr2.0, mo1.7 and V2.2, and the balance of Ti and unavoidable impurities.
In the pressing process of the 45-degree angle in the first step, the pressing amount is controlled to be 15-30% each time, the pressing amount of the first step for compression is controlled to be 40-60% according to the directions of the X, Y axis and the Z axis respectively, and the pressing amount of the first step for pulling and processing is controlled to be 25-35%.
The cooling speed in the first step is controlled between 5-20 ℃/min, and the cooling speed can refine the internal structure of the forging piece and improve the performance of the forging piece.
The finishing treatment in the fourth step mainly comprises sawing head and tail and straightening treatment.
In the extrusion process of the fourth step, the granularity of the external coating glass powder used for lubrication between the outer surface of the cylindrical section and the extrusion cylinder is 130-150 meshes, the thickness of the glass film is 0.4-0.5 mm, the granularity of the internal coating glass powder used for lubrication between the inner surface of the cylindrical section and the outer surface of the core rod is 80-100 meshes, the thickness of the glass film is 0.3-0.4 mm, a glass cushion is adopted between the cylindrical section and the outlet die, the granularity of the glass powder for manufacturing the glass cushion is 100-120 meshes, and the thickness of the glass cushion is uniform.
The following table is derived according to examples 1-3:
| structural properties of sheet material | Uniformity of size | Extrusion uniformity | |
| Example 1 | In general | Preferably | Preferably |
| Example 2 | Preferably | In general | Preferably |
| Example 3 | Preferably | Preferably | In general |
The last points to be described are: while the invention has been described in detail in the foregoing general description and with reference to specific embodiments, the foregoing embodiments are merely illustrative of the technical aspects of the invention and are not limiting thereof; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (8)
1. The method for controlling the tissue performance and the size uniformity of the wide integral extruded wallboard and the rolled plate is characterized by comprising the following steps of:
firstly, selecting a TA15 alloy plate as a blank, smelting according to a conventional process, simultaneously heating a heat treatment furnace, preheating, placing the treated blank in a treatment furnace at 1000-1200 ℃ for uniform tissue treatment after smelting, preserving heat for 18-24 hours at the temperature, slowly cooling, heating to 1200-1300 ℃, forging, firstly carrying out 45-degree opposite pressing on the blank, respectively compressing once according to the directions of a X, Y shaft and a Z shaft, respectively carrying out five-time drawing treatment after compression, repeatedly folding and forging the blank after each drawing, carrying out 45-degree opposite pressing again after the treatment is finished, then carrying out furnace return heat preservation, controlling the temperature at 950-1000 ℃ for 3-5 hours, and then repeating the steps of compression, drawing and forging, wherein the finish forging temperature is more than or equal to 750 ℃, so as to obtain a pretreated section;
step two, returning the obtained pretreated section to the furnace again for heat preservation, wherein the temperature is reduced by 100-200 ℃, the heat preservation time is unchanged, then cooling is carried out, annealing is carried out at 850-900 ℃, then austenitizing is carried out by adopting a hood-type resistance heating furnace, heat preservation is carried out for 6-12 hours, quenching is carried out, then primary tempering is carried out at 550-600 ℃, secondary tempering is carried out at 600-650 ℃, the temperature rising speed is controlled within the range of 60-100 ℃/h during tempering, the heat preservation time is controlled within 8-14 hours, the structure is refined through double refinement treatment, the size of carbide particles is controlled, and the structure performance and the size uniformity are improved;
step three, carrying out gradient heating on the profile obtained in the step two, then regulating the temperature range of a profile die outlet to 750-850 ℃, inputting the profile die outlet from one end with lower profile die temperature for extrusion, detecting the temperature near the die outlet, adopting air cooling or water cooling for cooling when the temperature near the die outlet is greater than 850 ℃, and carrying out heating on the profile by using a heating device when the temperature near the die outlet is less than 750 ℃, so that the contact position of the profile and the die outlet can be kept between 750-850 ℃ all the time, and extruding the cylindrical profile;
and fourthly, performing physical treatment on the cylindrical section by utilizing an involute principle after the cylindrical section is extruded, so that the cylindrical section can be unfolded, performing finishing treatment on the cylindrical section, extruding the cylindrical section by utilizing waste heat of the cylindrical section by utilizing two layers of rollers, uniformly spreading the cylindrical section, and performing on-line forced air cooling and water cooling quenching after the rollers are extruded to enable the cylindrical section to be rapidly cooled, thereby obtaining the wide wallboard.
2. The method for controlling the tissue performance and the dimensional uniformity of the wide-width integral extruded wallboard and the rolled sheet according to claim 1, wherein the method comprises the following steps of: and in the fourth step, the cooling speed is not less than 60 ℃/min, and the speed can refine the internal structure of the forging piece and improve the performance of the forging piece.
3. The method for controlling the tissue performance and the dimensional uniformity of the wide-width integral extruded wallboard and the rolled sheet according to claim 1, wherein the method comprises the following steps of: the TA15 alloy plate comprises the components of Al6.7, zr2.0, mo1.7 and V2.2, and the balance of Ti and unavoidable impurities.
4. The method for controlling the tissue performance and the dimensional uniformity of the wide-width integral extruded wallboard and the rolled sheet according to claim 1, wherein the method comprises the following steps of: in the pressing process of the 45-degree angle in the first step, the pressing amount is controlled to be 15-30% each time, the pressing amount of the first step for compression is controlled to be 40-60% according to the directions of the X, Y axis and the Z axis, and the pressing amount of the first step for pulling and processing is controlled to be 25-35%.
5. The method for controlling the tissue performance and the dimensional uniformity of the wide-width integral extruded wallboard and the rolled sheet according to claim 1, wherein the method comprises the following steps of: the cooling speed in the first step is controlled to be 5-20 ℃/min, and the cooling speed can refine the internal structure of the forging piece and improve the performance of the forging piece.
6. The method for controlling the tissue performance and the dimensional uniformity of the wide-width integral extruded wallboard and the rolled sheet according to claim 1, wherein the method comprises the following steps of: and the finishing treatment in the step four is sawing head and tail and straightening treatment.
7. The method for controlling the tissue performance and the dimensional uniformity of the wide-width integral extruded wallboard and the rolled sheet according to claim 1, wherein the method comprises the following steps of: the granularity of the external coating glass powder used for lubrication between the outer surface of the cylindrical section and the extrusion cylinder in the extrusion process of the step four is 130-150 meshes, the thickness of the glass film is 0.4-0.5 mm, the granularity of the internal coating glass powder used for lubrication between the inner surface of the cylindrical section and the outer surface of the core rod is 80-100 meshes, the thickness of the glass film is 0.3-0.4 mm, a glass cushion is adopted between the cylindrical section and the outlet die, the granularity of the glass powder for manufacturing the glass cushion is 100-120 meshes, and the thickness of the glass cushion is uniform.
8. The method for controlling the tissue performance and the dimensional uniformity of the wide-width integral extruded wallboard and the rolled sheet according to claim 1, wherein the method comprises the following steps of: and in the third step, when the section bar is subjected to gradient heating, the temperature difference between two ends of the section bar is controlled to be 60-100 ℃.
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