Titanium alloy and high-temperature alloy bar and wire rod continuous rolling production line and production process

Abstract

The invention relates to the technical field of rod and wire rod production, in particular to a titanium alloy and high-temperature alloy rod and wire rod continuous rolling production line and a production process. The production line comprises a first heating stepping furnace, a second heating stepping furnace, a first pinch roll, a roughing mill unit, a head removing rail, a second pinch roll, an intermediate mill unit, a finishing mill unit and a rod and wire production line which are sequentially connected in the longitudinal direction. A feeding port of the first heating stepping furnace is connected with the automatic feeding machine, the automatic feeding machine comprises a first feeding frame and a second feeding frame, the discharging end of the second feeding frame is connected with a feeding port of the second heating stepping furnace, and the feeding end of the second feeding frame is connected with the discharging end of the first feeding frame in a staggered mode. According to the production line, rapid switching can be achieved, continuous rolling can be efficiently and stably conducted, a rolled titanium alloy structure is uniform, and a high-temperature alloy structure is free of mixed crystals.

Description

Technical Field

[0001] The present invention relates to the technical field of bar and wire production, and particularly to a continuous rolling production line and production process for titanium alloy and superalloy bars and wires. Background Art

[0002] A bar and wire continuous rolling production line is usually a steel metallurgy industrial equipment for continuous rolling of round bars, square bars and other bars, as well as round wires, flat wires and equal-length wires. The main body of the rolling mill adopts a multi-stand configuration, and these stands can be divided into rough rolling, medium rolling and finishing rolling units. With the progress of the steel industry and the development and application of new materials, bar and wire rolling is gradually developing towards meeting the rolling requirements of multiple categories of metal materials. Titanium alloy and superalloy, as important strategic metal materials in the aerospace field, are characterized by multiple batches and small batches in their significant applications.

[0003] Superalloy refers to a class of metal materials that can work for a long time under high temperature above 600°C and certain stress, with excellent high-temperature strength, good oxidation and hot corrosion resistance, good fatigue performance, fracture toughness and other comprehensive properties, including cobalt-based superalloy, nickel-based superalloy, and iron-based superalloy, belonging to the category of special steel. During the rolling process of superalloy, problems such as abnormal grain growth caused by uneven temperature or stress, and "mixed crystal" structure caused by insufficient recrystallization ability due to unreasonable distribution of rolling deformation amount often occur. Superalloy has a high thermal conductivity and is suitable for high-speed rolling. The deformation heat generated during high-speed rolling can compensate for the self-cooling of the material, thereby avoiding the "mixed crystal" structure caused by the reduction of the material surface temperature during the rolling process.

[0004] Titanium alloy has a low thermal conductivity, and the heat release during the rolling deformation process is obvious. The rolling temperature and rolling speed will significantly affect the microstructure and properties of titanium alloy bars and wires. The key to obtaining good titanium alloy microstructure is to reduce the rolling speed and adopt a controlled rolling method with a dwell time between rolling passes.

[0005] Traditional superalloy rolling relies on special steel bar and wire continuous rolling mills, while titanium alloy rolling generally uses traditional portal rolling mills or transforms the ordinary steel rolling line by reducing the speed. Such methods not only make it difficult for the microstructure uniformity of titanium alloy to meet the high-quality requirements, but also the ordinary production line lacks the ability to freely switch between high-speed and low-speed rolling modes and cannot adapt to the mixed rolling requirements of titanium alloy and superalloy in multiple batches and small batches. Therefore, breaking through the design criteria of traditional steel rolling production lines and developing a dual-purpose production line with both titanium alloy and superalloy rolling functions has important engineering significance.

[0006] In view of this, the present invention is particularly proposed. Summary of the Invention

[0007] In view of the deficiencies of the prior art, the present invention proposes a continuous rolling production line and production process for titanium alloy and superalloy bars and wire rods. This production line can be quickly switched and can perform continuous rolling efficiently and stably. The titanium alloy rolled out has a uniform structure, and the superalloy structure has "no mixed crystals", and the grain size reaches grade 9.

[0008] To achieve the above object, the present invention adopts the following technical solutions:

[0009] The present invention proposes a continuous rolling production line for titanium alloy and superalloy bars and wire rods, including: a first heating walking beam furnace, a second heating walking beam furnace, a first pinch roll, a rough rolling mill group, a head-removing track, a second pinch roll, an intermediate rolling mill group, a finishing rolling mill group, and a bar and wire rod production line connected in sequence along the longitudinal direction; the feed inlet of the first heating walking beam furnace is connected to an automatic loading machine, the automatic loading machine includes a first loading rack and a second loading rack, the discharge end of the second loading rack is connected to the feed inlet of the second heating walking beam furnace, the feed end of the second loading rack is connected in a staggered manner with the discharge end of the first loading rack, the discharge end of the first loading rack is located above the feed inlet of the first heating walking beam furnace, and the discharge outlets of the first heating walking beam furnace and the second heating walking beam furnace are connected to the rough rolling mill group through a feeding track.

[0010] Specifically, the finishing rolling mill group includes a primary finishing rolling mill group and a secondary finishing rolling mill group. A controlled cooling unit is arranged between the primary finishing rolling mill group and the secondary finishing rolling mill group, and a reheat track is arranged between the controlled cooling unit and the secondary finishing rolling mill group.

[0011] Specifically, the mill spacing of the primary finishing rolling mill group is 4.5m to 6.5m, and the rolling speed is 3m / s to 9m / s; the controlled cooling unit cools the surface of the rolled piece by means of water mist, and realizes precise control of the temperature of the rolled piece through a temperature detection module combined with feedforward-feedback control.

[0012] Specifically, the length of the reheat track is 13m to 18m.

[0013] Specifically, a steel-splitting turnout is arranged at one end of the bar and wire rod production line connected to the finishing rolling mill group. The steel-splitting turnout divides the bar and wire rod production line into a bar production line and a wire rod production line. The bar production line includes a cooling bed and a bar conveying device. The bar conveying device is located between the cooling bed and the steel-splitting turnout. The wire rod production line includes a water quenching unit. An ultimate finishing rolling mill group is arranged between the water quenching unit and the steel-splitting turnout. A coiling device is arranged between the ultimate finishing rolling mill group and the water quenching unit, and a third pinch roll is arranged between the coiling device and the ultimate finishing rolling mill group.

[0014] Specifically, the cooling bed is a chain-type cooling bed.

[0015] Specifically, an induction reheating furnace is arranged between the head-removing track and the second pinch roll.

[0016] Specifically, the mill spacing of the roughing mill set is 2.5 m to 3.5 m, and the starting rolling speed is 0.2 mm / s; the mill spacing of the intermediate rolling mill set is 2.5 m to 3.5 m, and the rolling speed is 0.2 m / s to 1.0 m / s.

[0017] Specifically, the length of the run-out table is 30 m to 50 m.

[0018] The present invention also provides a continuous rolling production process for titanium alloy and superalloy bars and wires. The production process is based on the production line described in claim 1 and includes the following steps:

[0019] S1. Materials are added to the first heating walking beam furnace and the second heating walking beam furnace through an automatic loading machine. After being heated, the materials fall onto the feeding track. The first pinch roll feeds the heated materials to the roughing mill set for rolling to obtain rough rolled pieces.

[0020] S2. The run-out table transports the rough rolled pieces to the induction reheating furnace. The second pinch roll feeds the rough rolled pieces from the discharge port of the induction reheating furnace to the intermediate rolling mill set for rolling to obtain intermediate rolled pieces.

[0021] S3. The finishing mill set rolls the intermediate rolled pieces. During the rolling process, the primary finishing mill in the finishing mill set rolls the intermediate rolled pieces to obtain primary bars. The temperature control cooling unit in the finishing mill set cools and controls the temperature of the primary bars. After the cooled primary bars enter the warming track for warming, they enter the secondary finishing mill in the finishing mill set for rolling to obtain secondary bars.

[0022] S4. The secondary bars enter the bar production line through the steel sorting switch and are cooled to obtain final bars;

[0023] Or the secondary bars enter the wire production line through the steel sorting switch. The final rolling mill set rolls the secondary bars to obtain primary wires. The coiling device coils the primary wires to obtain coiled wires. After the coiled wires are cooled by the water quenching unit, final wires are obtained.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] (1) The automatic loading machine of the present invention includes a first loading rack and a second loading rack. The discharging end of the first loading rack is connected to the feeding end of the second loading rack in a staggered manner, and the discharging end of the second loading rack is connected to the feeding port of the second heating walking beam furnace. The discharging end of the first loading rack is located above the feeding port of the first heating walking beam furnace. During feeding, the first loading rack feeds longitudinally and discharges laterally, and can feed the first heating walking beam furnace or turn the material to the second loading rack. The second loading rack feeds and discharges laterally and can feed the second heating walking beam furnace. By setting up a set of automatic loading machines, the present invention realizes the synchronous operation of feeding the first heating walking beam furnace and the second heating walking beam furnace, and the separate operation of heating, which can save site space and provide material conditions for the rapid switching of titanium alloy and superalloy rolling.

[0026] (2) A temperature control cooling unit and a warming track are arranged between the primary finishing mill unit and the secondary finishing mill unit of the finishing mill unit on the production line of the present invention. The workpiece rolled by the primary finishing mill unit is cooled by the temperature control cooling unit. During the cooling process, the temperature control cooling unit can accurately control the surface temperature of the rolled piece. Since there is a temperature difference between the core and the edge of the cooled rolled piece, it is warmed on the warming track, and the temperature of the core of the cooled rolled piece can slowly spread to the edge, ensuring the uniformity of the edge and core temperatures of the rolled piece.

[0027] (3) By reasonably setting the spacing between the rolling mills in the rolling mill unit of the production line of the present invention, the rolled piece has sufficient soaking time before entering the next rolling mill, avoiding the too rapid increase in the core temperature of the rolled piece during rolling, which may cause non-uniformity of the rolled piece structure.

[0028] (4) A water quenching system is arranged on the wire rod production line of the production line of the present invention, which can quickly cool the coiled wire rod into water after coiling, providing ideal processing conditions for the subsequent drawing process and ensuring the stability of the material properties. In addition, a chain cooling bed is arranged on the bar production line of the production line of the present invention. The secondary bar is straightened without external stress and residual temperature on the chain cooling bed through natural cooling and self-turning, effectively ensuring the straightness of the final bar and reducing the problems of deformation and stress concentration in subsequent processing.

[0029] (5) The production line of the present invention supports the rapid switching rolling of small batches, multiple batches, and multiple grades of special metals, and is equipped with an efficient and rapid roll change system, which can complete the switching in an extremely short time, realize the continuous production of products of different grades and specifications, significantly improve the production flexibility and efficiency, and meet the diversified and customized production needs of special metal materials. Description of the Drawings

[0030] Figure 1 is the layout diagram of the rough rolling mill unit, the intermediate rolling mill unit and the finishing mill unit in the production line of the present invention;

[0031] Figure 2 is the layout diagram of the bar and wire rod production line in the production line of the present invention;

[0032] Figure 3 It is the transverse edge metallographic diagram of the GH4169 superalloy ultimate bar prepared in Example 2 of the present invention;

[0033] Figure 4 It is the core metallographic diagram of the GH4169 superalloy ultimate bar prepared in Example 2 of the present invention

[0034] Figure 5 It is the transverse edge metallographic diagram of the TC4 titanium alloy ultimate wire prepared in Example 3 of the present invention;

[0035] Figure 6 It is the core metallographic diagram of the TC4 titanium alloy ultimate wire prepared in Example 3 of the present invention.

[0036] Reference numerals: 1. Automatic loading machine; 101. First loading rack; 102. Second loading rack; 2. First heating walking beam furnace; 3. Second heating walking beam furnace; 4. First pinch roll; 5. Rough rolling mill group; 6. Decapitation track; 7. Induction reheating furnace; 8. Second pinch roll; 9. Medium rolling mill group; 10. Primary finishing mill group; 11. Temperature control cooling unit; 12. Reheating track; 13. Secondary finishing mill group; 14. Steel splitting switch; 15. Ultimate finishing mill group; 16. Third pinch roll; 17. Water quenching unit; 18. Cooling bed. Detailed implementation manners

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] Example 1

[0039] Reference Figure 1 and Figure 2, this embodiment provides a continuous rolling production line for titanium alloy and superalloy bars and wire rods, including a first heating walking beam furnace 2, a second heating walking beam furnace 3, a first pinch roll 4, a rough rolling mill set 5, a head-removing track 6, a second pinch roll 8, an intermediate rolling mill set 9, a finishing rolling mill set, and a bar and wire rod production line, which are connected in sequence along the longitudinal direction. The feed inlet of the first heating walking beam furnace 2 is connected to the automatic loading machine 1. The automatic loading machine 1 includes a first loading rack 101 and a second loading rack 102. The discharge end of the second loading rack 102 is connected to the feed inlet of the second heating walking beam furnace 3. The feed end of the second loading rack 102 is connected to the discharge end of the first loading rack 101 in a staggered manner. The discharge end of the first loading rack 101 is located above the feed inlet of the first heating walking beam furnace 3. The discharge outlets of the first heating walking beam furnace 2 and the second heating walking beam furnace 3 are connected to the rough rolling mill set 5 through a feeding track.

[0040] In this embodiment, since the discharge end of the first loading rack 101 is connected to the feed end of the second loading rack 102 in a staggered manner, the first loading rack 101 can feed longitudinally and discharge laterally, which can feed the first heating walking beam furnace 2 and can also turn the material over to the second loading rack 102. The second loading rack 102 can feed the second heating walking beam furnace 3 by lateral feeding and discharging. Such a setting enables a set of automatic loading machine 1 to simultaneously meet the feeding requirements of both the first heating walking beam furnace 2 and the second heating walking beam furnace 3, while the heating operates separately, saving site space and providing material conditions for the rapid switching of titanium alloy and superalloy rolling. Among them, the first heating walking beam furnace 2 and the second heating walking beam furnace 3 respectively heat the titanium alloy billet and the superalloy billet. In this embodiment, the first heating walking beam furnace 2 heats the titanium alloy billet at a heating temperature of 650°C to 1000°C, and the second walking beam furnace 3 heats the superalloy billet at a heating temperature of 900°C to 1250°C. The billets after being heated by the first walking beam heating furnace and the second walking beam furnace roll onto the same feeding track. The first pinch roll 4 sends the heated material to the rough rolling mill set 5 for rolling to obtain a rough rolled piece. The rough rolled piece falls onto the head-removing track 6. The length of the head-removing track 6 is set to be 30m to 50m. During the process of transporting the rough rolled piece on the head-removing track 6, the rough rolled piece can be naturally cooled on the head-removing track 6 to achieve the uniformization of the temperature of the edge and the core of the rough rolled piece. The second pinch roll 8 sends the rough rolled piece on the head-removing track 6 to the intermediate rolling mill set 9 for rolling to obtain an intermediate rolled piece. The intermediate rolled piece enters the finishing rolling mill set for rolling to obtain a secondary bar. The secondary bar enters the bar and wire rod production line and is processed by the bar and wire rod production line to obtain the final bar or the final wire.

[0041] The finishing mill set includes a primary finishing mill 10 and a secondary finishing mill 13. A controlled cooling unit 11 is arranged between the primary finishing mill 10 and the secondary finishing mill 13, and a rewarming track 12 is arranged between the controlled cooling unit 11 and the secondary finishing mill 13. When the finishing mill set rolls the rolled piece, the rolled piece is first rolled by the primary finishing mill 10 to obtain a primary bar. The primary bar enters the controlled cooling unit 11. The controlled cooling unit 11 rapidly cools the surface of the rolled piece by means of water mist, and precisely controls the temperature of the rolled piece through a temperature detection module combined with feedforward-feedback control. The cooled rolled piece enters the rewarming track 12 for rewarming, controls the cross-sectional temperature of the rolled piece within the process requirements range, and ensures the uniformity of the edge and core temperatures of the rolled piece, thereby ensuring the uniformity of the final structure.

[0042] A steel splitting switch 14 is arranged at one end of the bar and wire production line connected to the finishing mill set. The steel splitting switch 14 divides the bar and wire production line into a bar production line and a wire production line;

[0043] The bar production line includes a cooling bed 18 and a bar conveying device. The bar conveying device is located between the cooling bed 18 and the steel splitting switch 14. In this embodiment, the cooling bed 18 is preferably a chain-type cooling bed. After the secondary bar enters the bar production line through the steel splitting switch 14, it realizes stress-free after-temperature straightening through natural cooling and self-turning on the chain-type cooling bed, effectively ensuring the straightness of the rolled piece and reducing the problems of deformation and stress concentration in subsequent processing;

[0044] The wire production line includes a water quenching unit 17. An ultimate finishing mill 15 is arranged between the water quenching unit 17 and the steel splitting switch 14. A coiling device is arranged between the ultimate finishing mill 15 and the water quenching unit 17, and a third pinch roll 16 is arranged between the coiling device and the ultimate finishing mill 15. After the secondary bar enters the wire production line through the steel splitting switch 14, it is first rolled by the ultimate rolling mill set to obtain a primary wire. After the coiling device coils the primary wire, a coiled wire is obtained. The obtained coiled wire immediately enters the water quenching unit 17 for cooling to obtain an ultimate wire.

[0045] To perform temperature compensation on the rough rolled workpiece, an induction reheating furnace 7 may also be provided between the head-removing track 6 and the second pinch roll 8. When the titanium alloy rough rolled workpiece passes through the induction reheating furnace 7, the induction reheating furnace 7 does not operate. When the superalloy rough rolled workpiece enters the induction reheating furnace 7 for automatic temperature compensation, the induction reheating furnace 7 achieves a three-dimensional temperature field uniformity of ±10% industrial-grade precision standard through multi-dimensional magnetic flux optimization design, effectively suppressing the phenomenon of local overheating, fundamentally eliminating the risk of thermally induced phase transformation of the material microstructure, and having a high-power induction function for reheating from 900°C to 1200°C. The superalloy rough rolled workpiece after reheating enters the intermediate rolling mill set 9 through the second pinch roll 8, and the rolling of the superalloy intermediate rolled workpiece can be realized.

[0046] In this embodiment, the material added by the automatic loader 1 is a billet with a diameter of Φ90mm to Φ110mm, the rough rolled workpiece is a bar with a diameter of Φ50mm to Φ60mm, the intermediate rolled workpiece is a bar with a diameter of Φ26.5 to Φ50mm, the primary bar is a bar with a diameter of Φ19.5mm to Φ45mm, the secondary bar is a bar with a diameter of Φ13.5mm to Φ40mm, the specification of the final wire rod is Φ12mm to Φ13.5mm, the distance between the rolling mills in the rough rolling mill set 5 is 2.5m to 3.5m, the starting rolling speed is 0.2mm / s, the distance between the rolling mills in the intermediate rolling mill set 9 is 2.5m to 3.5m, and the rolling speed is adjustable within the range of 0.2m / s to 1.0m / s to adapt to the different rolling speeds of titanium alloy and superalloy. The distance between the rolling mills in the primary rolling mill set is 4.5m to 6.5m, and the rolling speed is adjustable within the range of 3m / s to 9m / s. In the final rolling mill set, the distance between the rolling mills is set to 2.5 to 3.5m.

[0047] Embodiment 2

[0048] This embodiment proposes a production process for TC4 titanium alloy and GH4169 superalloy wire rods, specifically the following steps:

[0049] S1. The automatic loader 1 adds a Φ100mm TC4 titanium alloy billet to the first heating walking beam furnace 2 through the first loading rack 101. At the same time, the Φ100mm GH4169 superalloy billet is flipped onto the second loading rack 102 through the first loading rack 101. The second loading rack 102 adds the Φ100mm GH4169 superalloy billet to the second heating walking beam furnace 3 through lateral discharging. The heated billets all fall onto the feeding track, and the first pinch roll 4 sends the heated billets to the rough rolling mill set 5 for rolling to obtain a Φ55mm rough rolled workpiece. Among them, the heating temperature of the first heating walking beam furnace 2 is 800°C, the heating temperature of the second heating walking beam furnace 3 is 1100°C, and the spacing of the billets on the feeding track after heating can be controlled by setting the discharging time interval of the two heating walking beam furnaces.

[0050] S2. The head-removing track 6 transports the rough rolled workpiece to the induction reheating furnace 7. When the titanium alloy rough rolled workpiece passes through the induction reheating furnace 7, the induction reheating furnace 7 does not operate. The superalloy rough rolled workpiece enters the induction reheating furnace 7 for automatic temperature compensation. The second pinch roll 8 sends the material at the outlet of the induction furnace to the medium rolling mill unit 9 for rolling to obtain a medium rolled workpiece with a diameter of Φ26.5 mm.

[0051] S3. The finishing mill unit rolls the medium rolled workpiece. During the rolling process, the primary finishing mill 10 in the finishing mill unit rolls the medium rolled workpiece to obtain a primary bar with a diameter of Φ19.5 mm. The temperature control and cooling unit 11 in the finishing mill unit cools and controls the temperature of the primary bar. After the cooled primary bar enters the warming track 12 for warming, it enters the secondary finishing mill 13 in the finishing mill unit for rolling to obtain a secondary bar with a diameter of Φ13.5 mm.

[0052] S4. After the secondary bar enters the bar production line through the steel-splitting switch 14 and is cooled, a TC4 titanium alloy final bar with a diameter of Φ13.5 mm and a GH4169 superalloy final bar are obtained.

[0053] In this embodiment, the distance between the rolling mills in the rough rolling mill unit 5 is 3 m, and the starting rolling speed is 0.2 mm / s. The distance between the rolling mills in the medium rolling mill unit 9 is 3 m, and the rolling speed is adjustable within the range of 0.2 m / s to 1.0 m / s to adapt to the different rolling speeds of titanium alloy and superalloy. The distance between the rolling mills in the primary rolling mill unit is 5 m, and the rolling speed is adjustable within the range of 3 m / s to 9 m / s. In the final rolling mill unit, the distance between the rolling mills is set to 3 m.

[0054] In this embodiment, the materials and working temperatures of the materials added to the two heating walking beam furnaces can be flexibly adjusted according to requirements.

[0055] In this embodiment, the metallographic diagram of the obtained superalloy bar refers to Figure 3 and Figure 4 , it can be seen that the transverse structure of the bar is fine and uniform, without "mixed crystal" structure, and the grain size can reach grade 9, meeting the requirements of high-quality superalloy standards.

[0056] Example 3

[0057] The difference between this embodiment and Comparative Example 2 is that in S4 of this embodiment, after the secondary bar enters the wire production line through the steel-splitting switch 14, a TC4 titanium alloy final wire with a diameter of Φ12 mm and a GH4169 superalloy final wire are obtained.

[0058] In this embodiment, the metallographic diagram of the obtained titanium alloy wire refers to Figure 5 and Figure 6 , it can be seen that the transverse structure of the wire is fine and uniform, all of which are equiaxed structures, and can meet the requirements of market customers and standards.

[0059] In the above embodiments, a part of the secondary bars can also enter the bar production line through the steel dividing switch 14 according to requirements, and another part of the secondary bars enter the wire production line through the steel dividing switch 14.

[0060] In the above embodiments, the specifications of the secondary bars can also be controlled by whether the bars are empty in the primary finishing mill or the secondary finishing mill. Among them, the secondary bars with a diameter of Φ13.5mm to Φ15mm can enter the bar production line or the wire production line through the steel dividing switch 14, while the secondary bars with a diameter of Φ15mm to Φ40mm can only enter the bar production line through the steel dividing switch 14.

[0061] The specific implementation manners of the present invention enable those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0062] It should be understood that the present invention is not limited to the content already described above, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A continuous rolling production line for titanium alloy and superalloy bars and wires, characterized in that, Including: A first heating walking beam furnace (2), a second heating walking beam furnace (3), a first pinch roll (4), a rough rolling mill set (5), a head-removing track (6), a second pinch roll (8), a medium rolling mill set (9), a finishing mill set, and a bar and wire rod production line, which are connected in sequence longitudinally; the feed inlet of the first heating walking beam furnace (2) is connected to an automatic loading machine (1), the automatic loading machine (1) includes a first loading rack (101) and a second loading rack (102), the discharge end of the second loading rack (102) is connected to the feed inlet of the second heating walking beam furnace (3), the feed end of the second loading rack (102) is connected to the discharge end of the first loading rack (101) in a staggered manner, the discharge end of the first loading rack (101) is located above the feed inlet of the first heating walking beam furnace (2), and the discharge outlets of the first heating walking beam furnace (2) and the second heating walking beam furnace (3) are connected to the rough rolling mill set (5) through a feeding track.

2. The titanium alloy and superalloy bar and wire continuous rolling production line according to claim 1, characterized in that, The finishing mill set includes a primary finishing mill set (10) and a secondary finishing mill set (13), a controlled cooling unit (11) is arranged between the primary finishing mill set (10) and the secondary finishing mill set (13), and a reheat track (12) is arranged between the controlled cooling unit (11) and the secondary finishing mill set (13).

3. The titanium alloy and superalloy bar and wire continuous rolling production line according to claim 2, wherein, The mill spacing of the primary finishing mill set (10) is 4.5 m to 6.5 m, and the rolling speed is 3 m / s to 9 m / s; the controlled cooling unit (11) cools the surface of the rolled piece by means of water mist, and realizes precise control of the temperature of the rolled piece through a temperature detection module combined with feedforward-feedback control.

4. The titanium alloy and superalloy bar and wire continuous rolling production line according to claim 2, characterized in that The length of the reheat track (12) is 13 m to 18 m.

5. The titanium alloy and superalloy bar and wire continuous rolling production line according to claim 1, characterized in that, At one end of the bar and wire rod production line connected to the finishing mill set, a steel splitting switch (14) is arranged, the steel splitting switch (14) divides the bar and wire rod production line into a bar production line and a wire production line, the bar production line includes a cooling bed (18) and a bar conveying device, the bar conveying device is located between the cooling bed (18) and the steel splitting switch (14), the wire production line includes a water quenching unit (17), an ultimate finishing mill set (15) is arranged between the water quenching unit (17) and the steel splitting switch (14), a coiling device is arranged between the ultimate finishing mill set (15) and the water quenching unit (17), and a third pinch roll (16) is arranged between the coiling device and the ultimate finishing mill set (15).

6. The titanium alloy and superalloy bar and wire continuous rolling production line according to claim 5, characterized in that, The cooling bed (18) is a chain-type cooling bed.

7. The titanium alloy and superalloy bar and wire continuous rolling production line according to claim 1, characterized in that, An induction reheating furnace (7) is arranged between the head-removing track (6) and the second pinch roll (8).

8. The titanium alloy and superalloy bar and wire continuous rolling production line according to claim 1, characterized in that, The mill spacing of the rough rolling mill set (5) is 2.5 m to 3.5 m, and the starting rolling speed is 0.2 mm / s; the mill spacing of the medium rolling mill set (9) is 2.5 m to 3.5 m, and the rolling speed is 0.2 m / s to 1.0 m / s.

9. The titanium alloy and superalloy bar and wire continuous rolling production line according to claim 1, wherein The length of the head-removing track (6) is 30 m to 50 m.

10. A continuous rolling production process for titanium alloy and superalloy bars and wires, characterized in that, The production process is based on the production line described in claim 1 and includes the following steps: S1. Add materials to the first heating walking beam furnace (2) and the second heating walking beam furnace (3) through an automatic feeding machine (1). After heating, the materials fall onto the feeding track, and the first pinch roll (4) sends the heated materials to the rough rolling mill (5) for rolling to obtain rough rolled parts. S2. The head-removing track (6) transports the rough rolled parts to the induction reheating furnace (7), and the second pinch roll (8) sends the rough rolled parts from the discharge port of the induction reheating furnace (7) to the intermediate rolling mill (9) for rolling to obtain intermediate rolled parts. S3. The finishing mill rolls the intermediate rolled parts. During the rolling process, the primary finishing mill (10) in the finishing mill rolls the intermediate rolled parts to obtain primary bars. The controlled cooling unit (11) in the finishing mill cools and controls the temperature of the primary bars. After the cooled primary bars enter the warming track (12) for warming, they enter the secondary finishing mill (13) in the finishing mill for rolling to obtain secondary bars. S4. The secondary bars enter the bar production line through the steel-splitting switch (14), and after cooling, the final bars are obtained. Or the secondary bars enter the wire production line through the steel-splitting switch (14). The final rolling mill rolls the secondary bars to obtain primary wire. After the coiling device coils the primary wire, coiled wire is obtained. After the water quenching unit (17) cools the coiled wire, the final wire is obtained.

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