Rapid heat treatment device for titanium alloy

Abstract

The invention discloses a titanium alloy rapid heat treatment device which is characterized in that the titanium alloy rapid heat treatment device comprises a box body, a mounting beam and a temperature sensor, a mounting beam movement driving mechanism is arranged on the box body, so that the mounting beam can move up and down, and a stress application clamping mechanism and a movable clamping mechanism are arranged on the mounting beam; the stress application clamping mechanism is fixed to the mounting beam and used for clamping one end of a titanium alloy bar, the movable clamping mechanism can slide relative to the mounting beam and used for clamping the other end of the titanium alloy bar, the stress application clamping mechanism and the movable clamping mechanism are both conductive and electrically connected with a power source, and a water inlet and a water outlet are formed in the box body; the heat treatment device has the advantages that the titanium alloy bar can be rapidly heated to the target treatment temperature, the heat treatment time of the titanium alloy is greatly shortened, the production efficiency is improved, meanwhile, the titanium alloy can be rapidly cooled, the working procedures of the heat treatment process are simplified, and the production cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of heat treatment of metal materials, and in particular to a rapid heat treatment device for titanium alloys. Background Art

[0002] Titanium alloys are widely used in aerospace, energy, chemical industry and other fields due to their low density, high specific strength, corrosion resistance, high temperature resistance and other excellent properties. The mechanical properties of titanium alloys are closely related to their internal structure. Phase changes and organizational changes in titanium alloys usually lead to significant changes in their mechanical properties.

[0003] Heat treatment is one of the main means to optimize the structure of titanium alloys, especially through solution treatment and aging treatment, which can effectively regulate the microstructure of titanium alloys and enhance their strength, toughness and corrosion resistance. However, the traditional solution treatment method is to use a solution furnace for heating, which has a long heating and insulation time, high energy consumption, and long-term high temperature will cause large residual stress and organizational stress inside the titanium alloy material, resulting in easy deformation of the titanium alloy workpiece, reducing the fatigue life of the titanium alloy, etc., and the existing heat treatment method is easy to cause the titanium alloy to have a coarse structure, which seriously destroys the uniformity and density of the titanium alloy microstructure, greatly weakens the mechanical properties of the titanium alloy material, and greatly limits the effective application of titanium alloys in high-end application scenarios with extremely high requirements for strength performance and reliability. In addition, after heating the titanium alloy, the existing heat treatment method also needs to remove the titanium alloy from the solution furnace and then immerse it in coolant for cooling. The operation is cumbersome, and it is also necessary to increase the workpiece moving equipment between the two processes or move it manually, resulting in high production costs. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a rapid heat treatment device for titanium alloy, which can greatly shorten the heat treatment time of titanium alloy, improve its mechanical properties, simplify the heat treatment process and reduce production costs.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a rapid heat treatment device for titanium alloy, comprising a box body, a mounting beam and a temperature sensor, the box body is provided with a mounting beam moving drive mechanism, so that the mounting beam can move up and down, the mounting beam is provided with a force clamping mechanism and a mobile clamping mechanism, the force clamping mechanism is fixed on the mounting beam and is used to clamp one end of the titanium alloy bar, the mobile clamping mechanism and the mounting beam can slide relative to each other and are used to clamp the other end of the titanium alloy bar, the force clamping mechanism and the mobile clamping mechanism are both conductive and electrically connected to a power supply, the upper end of the box body is open, and the box body is provided with a water inlet and a drain, and the drain is located at the lower end or bottom of the box body.

[0006] Furthermore, the mounting beam moving drive mechanism includes a bracket fixed on the box body, a first horizontal plate and a second horizontal plate are fixedly provided on the bracket, the second horizontal plate is located below the first horizontal plate, a first cylinder is vertically fixed on the first horizontal plate, a piston rod of the first cylinder is fixed to the mounting beam, a first guide rod is fixedly provided between the first horizontal plate and the second horizontal plate, and the mounting beam vertically slides with the first guide rod.

[0007] Furthermore, the movable clamping mechanism includes a movable seat and a first conductive upper clamp and a first lower clamp, the movable seat is mounted on the mounting beam and horizontally slides with the mounting beam, a braking mechanism is arranged between the movable seat and the mounting beam, a second cylinder is vertically fixed on the movable seat, a groove extending along the sliding direction of the movable seat is arranged on the mounting beam, a piston rod of the second cylinder passes downward through the groove and is fixed to the first upper clamp, a second guide rod is fixedly arranged at the lower end of the movable seat, the first lower clamp is fixed to the lower end of the second guide rod, the first upper clamp vertically slides with the second guide rod, a first conductive block is fixedly arranged on the first lower clamp, and the first conductive block is electrically connected to the power supply.

[0008] Furthermore, a roller is rotatably connected inside the movable seat, and the roller is rollingly matched with the upper end surface of the mounting beam.

[0009] Furthermore, the braking mechanism includes a brake block and a third cylinder vertically fixed on the movable seat, the piston rod of the third cylinder is fixed to the brake block, the brake block is located above the mounting beam, and the third cylinder drives the brake block to move downward and against the mounting beam.

[0010] Furthermore, an anti-skid layer is fixedly provided on the lower end surface of the brake block.

[0011] Furthermore, the force-adding clamping mechanism includes a fixed block, a force-adding block, a conductive second upper clamp and a second lower clamp, the fixed block is fixed to the end of the mounting beam, a force-adding block moving drive mechanism is provided on the fixed block, a fourth cylinder is vertically fixed to the force-adding block, a piston rod of the fourth cylinder is fixed to the second upper clamp, a third guide rod is fixed to the lower end of the force-adding block, the second upper clamp is vertically slidably matched with the third guide rod, the second lower clamp is fixed to the lower end of the third guide rod, a second conductive block is fixed to the second lower clamp, and the second conductive block is electrically connected to the power supply.

[0012] Furthermore, the force block moving drive mechanism includes a fifth cylinder horizontally fixed on the fixed block, the piston rod of the fifth cylinder is fixed to the force block, a fourth guide rod horizontally arranged is fixed on the fixed block, and the force block is horizontally slidably matched with the fourth guide rod.

[0013] Furthermore, the temperature sensor is an infrared temperature sensor, and is fixed on the side wall of the box.

[0014] Compared with the prior art, the advantages of the present invention are: (1) The heat treatment device can quickly heat the titanium alloy bar to the target treatment temperature. Compared with the traditional heat treatment, it greatly shortens the heat treatment time of the titanium alloy and improves the production efficiency; (2) The heat treatment device can not only achieve rapid heating of the titanium alloy bar, but also achieve rapid cooling thereof, which greatly simplifies the heat treatment process and reduces production costs; (3) Rapid heating of the titanium alloy bar by the heat treatment device can effectively refine the grain structure inside the titanium alloy. At the same time as the electric heating, a tensile load is applied to the titanium alloy bar by the cooperation of the force-applying clamping mechanism and the mobile clamping mechanism. Through the coupling of tensile stress and current, the movement and interaction of dislocations inside the titanium alloy material can be promoted, and the phase transformation of the grains can be promoted, thereby improving the strength and plasticity (i.e., mechanical properties) of the titanium alloy material, and achieving a coordinated optimization of strength and plasticity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention; Figure 2 It is a structural stereogram of the present invention in another direction after removing the power supply; Figure 3 It is a structural schematic diagram of the mobile clamping mechanism of the present invention; Figure 4 It is a structural schematic diagram of the force-applying clamping mechanism of the present invention. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below with reference to the accompanying drawings.

[0017] like Figure 1As shown in FIG. 4 , a rapid heat treatment device for titanium alloy comprises a box body 1, a mounting beam 2 and a temperature sensor 3. The temperature sensor 3 is an infrared temperature sensor and is fixed on the side wall of the box body 1. The upper end of the box body 1 is open, and a water inlet 11 and a drain outlet 12 are arranged on the box body 1. The drain outlet 12 is located at the lower end or the bottom of the box body 1. The box body 1 is provided with a mounting beam moving driving mechanism. The mounting beam moving driving mechanism comprises a bracket 4 fixed on the box body 1. A first horizontal plate 41 and a second horizontal plate 42 are fixedly arranged on the bracket 4. The second horizontal plate 42 is located below the first horizontal plate 41. The first A first cylinder 43 is vertically fixed on the transverse plate 41, and a piston rod of the first cylinder 43 is fixed to the mounting beam 2. A first guide rod 44 is fixedly arranged between the first transverse plate 41 and the second transverse plate 42. The mounting beam 2 and the first guide rod 44 are vertically slidably matched, and the first cylinder 43 can drive the mounting beam 2 to move up and down; a mobile clamping mechanism 5 and a force clamping mechanism 6 are arranged on the mounting beam 2, the force clamping mechanism 6 is used to clamp one end of the titanium alloy bar, and the mobile clamping mechanism 5 is used to clamp the other end of the titanium alloy bar, and both the force clamping mechanism 6 and the mobile clamping mechanism 5 are conductive and electrically connected to the power supply 7; The mobile clamping mechanism 5 includes a mobile seat 50, a first upper clamp 51 and a first lower clamp 52. The first upper clamp 51 and the first lower clamp 52 are both conductive. The mobile seat 50 is sleeved on the mounting beam 2 and horizontally slides with the mounting beam 2. A braking mechanism is provided between the mobile seat 50 and the mounting beam 2. The braking mechanism includes a brake block 53 and a third cylinder 54 vertically fixed on the mobile seat 50. The piston rod of the third cylinder 54 is fixed to the brake block 53. The brake block 53 is located above the mounting beam 2. The third cylinder 54 drives the brake block 53 to move downward and abut against the mounting beam. 2, so that the moving seat 50 and the mounting beam 2 are relatively fixed; a second cylinder 55 is vertically fixed on the moving seat 50, and a slot 21 extending along the sliding direction of the moving seat 50 is provided on the mounting beam 2. The piston rod of the second cylinder 55 passes downward through the slot 21 and is fixed to the first upper clamp 51. A second guide rod 56 is fixedly provided at the lower end of the moving seat 50. The first upper clamp 51 and the second guide rod 56 are vertically slidably matched. The first lower clamp 52 is fixed to the lower end of the second guide rod 56. A first conductive block 57 is fixedly provided on the first lower clamp 52; The force-adding clamping mechanism 6 includes a fixed block 61, a force-adding block 62, a second upper clamp 63 and a second lower clamp 64. The second upper clamp 63 and the second lower clamp 64 are both conductive. The fixed block 61 is fixed to the end of the mounting beam 2. A horizontally arranged fifth cylinder 65 is fixed to the fixed block 61. The piston rod of the fifth cylinder 65 is fixed to the force-adding block 62. A horizontally arranged fourth guide rod 66 is fixed to the fixed block 61. The force-adding block 62 and the fourth guide rod 66 are horizontally slidably matched. A fourth cylinder 67 is vertically fixed to the force-adding block 62. The piston rod of the fourth cylinder 67 is fixed to the second upper clamp 63. A third guide rod 68 is fixed to the lower end of the force-adding block 62. The second upper clamp 63 and the third guide rod 68 are vertically slidably matched. The second lower clamp 64 is fixed to the lower end of the third guide rod 68. A second conductive block 69 is fixed to the second lower clamp 64. The second conductive block 69 and the first conductive block 57 are electrically connected to the positive and negative poles of the power supply 7, respectively.

[0018] In the above embodiment, in order to make the sliding of the moving seat 50 and the mounting beam 2 smooth, a roller 58 may be rotatably connected in the moving seat 50, and the roller 58 rolls with the upper end surface of the mounting beam 2. In addition, an anti-skid layer may be fixedly provided on the lower end surface of the brake block 53, and when the brake block 53 abuts against the upper end surface of the mounting beam 2 for braking the moving seat 50, the braking reliability of the brake block 53 on the moving seat 50 may be improved through the anti-skid layer.

[0019] In addition, the clamping groove between the first upper clamp 51 and the first lower clamp 52, and the clamping groove between the second upper clamp 63 and the second lower clamp 64 in the rapid heat treatment device of the present invention can be circular, V-shaped, etc., to facilitate clamping of titanium alloy bars; in addition, the first cylinder 43, the second cylinder 55, the third cylinder 54, the fourth cylinder 67 and the fifth cylinder 65 can also be replaced by hydraulic cylinders, electric push rods, etc.

[0020] The method of using the rapid heat treatment device of the present invention is as follows: first, add coolant such as water into the box body 1, then control the fourth cylinder 67 in the force clamping mechanism 6 to lift the second upper clamp 63 upward, place one end of the titanium alloy bar on the second lower clamp 64, and the fourth cylinder 67 drives the second upper clamp 63 to move down and clamp one end of the titanium alloy bar, and then manually push the movable seat 50 in the movable clamping mechanism 5 so that the movable clamping mechanism 5 is located at the other end of the titanium alloy bar, and then control the third cylinder 54 to drive the brake block 53 to move down and abut against the upper end surface of the mounting beam 2, so that the movable seat 50 is fixed on the mounting beam 2, and then control the second cylinder 55 to drive the first upper clamp 51 to move upward, place the other end of the titanium alloy bar on the first lower clamp 52, and the second cylinder 55 drives the first upper clamp 51 to move down and clamp the titanium alloy bar The other end of the material; then the titanium alloy bar is energized through the first conductive block 57 and the second conductive block 69, and the temperature of the titanium alloy bar is detected in real time through the temperature sensor 3; at the same time, the fifth cylinder 65 pushes the force block 62 to move away from the mounting beam 2, and applies a tensile load to the titanium alloy bar until the bar is heated to the required temperature; then the power supply 7 is disconnected, and the mounting beam 2 is driven downward by the first cylinder 43, and the mounting beam 2 drives the mobile clamping mechanism 5 and the force clamping mechanism 6 to move downward synchronously, and the titanium alloy bar is quickly immersed in water for cooling, completing the rapid quenching of the titanium alloy bar. After cooling to room temperature, the first cylinder 43 drives the mounting beam 2 to move upward, and then the first upper clamp 51 and the second upper clamp 63 are correspondingly lifted by the second cylinder 55 and the fourth cylinder 67, and the titanium alloy bar after rapid heat treatment is taken out.

[0021] The mechanical properties of the titanium alloy bar treated by the rapid heat treatment device of the present invention are verified, specifically: Take two titanium alloy bars of the same specification and nominal composition of Ti-6Al-4V, one of which is placed in a conventional solution furnace for solution treatment, and the other is installed in the rapid thermal treatment device of the present invention for rapid electric heating. While being electrically heated, a tensile load of 10 MPa is applied to the two titanium alloy bars. After being heated to 900°C, the two titanium alloy bars are immersed in coolant and cooled to room temperature, and then their tensile strength and yield strength are tested respectively. The results are as follows: Tensile strength (MPa) Yield strength (MPa) Solution treatment 963 785 Current heat treatment 1078 951 It can be seen from the table that the tensile strength and yield strength of the titanium alloy bar after rapid current heat treatment are significantly higher than those after traditional solution heat treatment, which are increased by 11.9% and 21.1% respectively.

[0022] The protection scope of the present invention includes but is not limited to the above embodiments, and its protection scope is subject to the claims. Any replacement, deformation, and improvement of the technology that can be easily thought of by technicians in this field shall fall within the protection scope of the present invention.

Claims

1. A rapid heat treatment device for titanium alloy, characterized in that It includes a box body, a mounting beam and a temperature sensor. The box body is provided with a mounting beam moving drive mechanism so that the mounting beam can move up and down. The mounting beam is provided with a force clamping mechanism and a mobile clamping mechanism. The force clamping mechanism is fixed on the mounting beam and is used to clamp one end of the titanium alloy bar. The mobile clamping mechanism and the mounting beam can slide relative to each other and are used to clamp the other end of the titanium alloy bar. Both the force clamping mechanism and the mobile clamping mechanism are conductive and electrically connected to a power supply. The upper end of the box body is open, and the box body is provided with a water inlet and a drain outlet. The drain outlet is located at the lower end or bottom of the box body.

2. A rapid heat treatment device for titanium alloy according to claim 1, characterized in that: The mounting beam moving drive mechanism includes a bracket fixed on the box body, a first horizontal plate and a second horizontal plate are fixedly arranged on the bracket, the second horizontal plate is located below the first horizontal plate, a first cylinder is vertically fixed on the first horizontal plate, a piston rod of the first cylinder is fixed to the mounting beam, a first guide rod is fixedly arranged between the first horizontal plate and the second horizontal plate, and the mounting beam is vertically slidably matched with the first guide rod.

3. A rapid heat treatment device for titanium alloy according to claim 1, characterized in that: The movable clamping mechanism includes a movable seat and a first conductive upper clamp and a first lower clamp. The movable seat is mounted on the mounting beam and horizontally slides with the mounting beam. A braking mechanism is arranged between the movable seat and the mounting beam. A second cylinder is vertically fixed on the movable seat. A groove extending along the sliding direction of the movable seat is arranged on the mounting beam. The piston rod of the second cylinder passes downward through the groove and is fixed to the first upper clamp. A second guide rod is fixedly arranged at the lower end of the movable seat. The first lower clamp is fixed to the lower end of the second guide rod. The first upper clamp vertically slides with the second guide rod. A first conductive block is fixedly arranged on the first lower clamp, and the first conductive block is electrically connected to the power supply.

4. A rapid heat treatment device for titanium alloy as claimed in claim 3, characterized in that: A roller is rotatably connected inside the movable seat, and the roller is rollingly matched with the upper end surface of the mounting beam.

5. A rapid heat treatment device for titanium alloy as claimed in claim 3, characterized in that: The braking mechanism includes a brake block and a third cylinder vertically fixed on the moving seat, the piston rod of the third cylinder is fixed to the brake block, the brake block is located above the mounting beam, and the third cylinder drives the brake block to move downward and abut against the mounting beam.

6. A rapid heat treatment device for titanium alloy according to claim 5, characterized in that: The lower end surface of the brake block is fixedly provided with an anti-skid layer.

7. A rapid heat treatment device for titanium alloy according to claim 1, characterized in that: The force-adding clamping mechanism includes a fixed block, a force-adding block, a conductive second upper clamp and a second lower clamp. The fixed block is fixed to the end of the mounting beam. A force-adding block moving drive mechanism is provided on the fixed block. A fourth cylinder is vertically fixed to the force-adding block. The piston rod of the fourth cylinder is fixed to the second upper clamp. A third guide rod is fixed to the lower end of the force-adding block. The second upper clamp is vertically slidably matched with the third guide rod. The second lower clamp is fixed to the lower end of the third guide rod. A second conductive block is fixed to the second lower clamp. The second conductive block is electrically connected to the power supply.

8. A rapid heat treatment device for titanium alloy according to claim 7, characterized in that: The force block moving drive mechanism includes a fifth cylinder horizontally fixed on the fixed block, the piston rod of the fifth cylinder is fixed to the force block, a fourth guide rod horizontally arranged is fixed on the fixed block, and the force block and the fourth guide rod are horizontally slidably matched.

9. A rapid heat treatment device for titanium alloy according to claim 1, characterized in that: The temperature sensor is an infrared temperature sensor and is fixed on the side wall of the box.

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