Titanium alloy forge piece forging method and titanium alloy forge piece

Abstract

The invention provides a titanium alloy forge piece forging method and a titanium alloy forge piece, and relates to the field of aircraft part forging, and the method comprises the steps that according to the required cooling rate in the titanium alloy forge piece forging process requirement, a target heat preservation sheath corresponding to the titanium alloy forge piece is selected from a temperature drop rate table; the temperature drop rate table is used for representing the temperature drop rate when the titanium alloy forge piece is coated with different heat preservation jackets; and the titanium alloy forge piece is wrapped with the target heat preservation sheath for forging. The method is suitable for being used in the forging process of the titanium alloy forge piece and is used for selecting a proper thermal insulation material.

Description

Technical Field

[0001] The present application relates to the field of aircraft parts forging, and in particular to a titanium alloy forging method and a titanium alloy forging. Background Art

[0002] Titanium alloys are widely used in aircraft parts. The thermal insulation materials used in the forging process of titanium alloy forgings play a key role in product forming. For example, excellent thermal insulation materials can not only ensure the smooth forging, but also extend the life of the die and improve the quality of workpiece forming. Inappropriate thermal insulation materials lead to poor thermal insulation effects, which not only hinder the forging forming and accelerate the loss of die life, but also easily cause cold die effect. Cold die structure, i.e., surface coarse grain structure, affects the uniformity of forging structure and greatly reduces the plasticity and toughness of the product.

[0003] Therefore, how to choose suitable insulation materials becomes our need. Summary of the invention

[0004] The present application provides a titanium alloy forging method and a titanium alloy forging, which are used to select a suitable thermal insulation material during the forging process of the titanium alloy forging.

[0005] In a first aspect, the present application provides a method for forging a titanium alloy forging, the method comprising: selecting a target insulation cover corresponding to the titanium alloy forging from a temperature drop rate table according to the required cooling rate in the forging process requirements of the titanium alloy forging; the temperature drop rate table is used to indicate the temperature drop rate when the titanium alloy forging is covered with different insulation covers; and forging the titanium alloy forging by covering the target insulation cover.

[0006] The titanium alloy forging method provided in the present application can select the target insulation package corresponding to the titanium alloy forging from the temperature drop rate table according to the required cooling rate in the forging process requirements of the titanium alloy forging, and the temperature drop rate table is used to indicate the temperature drop rate when the titanium alloy forging is covered with different insulation packages. In this way, the selected target insulation package is the insulation package that matches the cooling rate required by the process, thereby providing a solution for selecting a suitable insulation material.

[0007] Optionally, the temperature drop rate table includes the temperature drop rate of each insulation bag in different temperature ranges.

[0008] Optionally, according to the required cooling rate in the forging process requirements of the titanium alloy forgings, a target insulation sheath corresponding to the titanium alloy forgings is selected from the temperature drop rate table, including: according to the forging temperature in the forging process requirements of the titanium alloy forgings, determining the target temperature range of the forging temperature from the temperature drop rate table; within the target temperature range in the temperature drop rate table, determining an insulation sheath whose temperature drop rate matches the required cooling rate as the target insulation sheath.

[0009] Optionally, the temperature drop rate table includes a ceramic fiber blanket temperature drop rate table and a glass fiber cloth temperature drop rate table; the ceramic fiber blanket temperature drop rate table includes ceramic fiber blankets of various thickness specifications, and the temperature drop rate of each ceramic fiber blanket of each thickness specification in different temperature ranges; the glass fiber cloth temperature drop rate table includes glass fiber cloths of various thickness specifications, and the temperature drop rate of each glass fiber cloth of each thickness specification in different temperature ranges.

[0010] Optionally, the temperature drop rate table of the ceramic fiber blanket includes ceramic fiber blankets of 6mm, 12.5mm, and 20mm thickness specifications; the temperature drop rate of the ceramic fiber blanket of 6mm thickness specification in the temperature range of 900℃-501℃ is 4.70℃ / min, the temperature drop rate in the temperature range of 500℃-301℃ is 2.00℃ / min, the temperature drop rate in the temperature range of 300℃-101℃ is 0.60℃ / min, and the temperature drop rate in the temperature range of 100℃-25℃ is 0.14℃ / min; the temperature drop rate of the ceramic fiber blanket of 12.5mm thickness specification in the temperature range of 900℃-501℃ is 3.50℃ / min, and the temperature drop rate in the temperature range of 500℃-301℃ is 2.00℃ / min, the temperature drop rate in the temperature range of 300℃-101℃ is 0.60℃ / min, and the temperature drop rate in the temperature range of 100℃-25℃ is 0.14℃ / min. The temperature drop rate in the temperature range of 100℃-301℃ is 1.50℃ / min, the temperature drop rate in the temperature range of 300℃-101℃ is 0.50℃ / min, and the temperature drop rate in the temperature range of 100℃-25℃ is 0.13℃ / min; the temperature drop rate of the ceramic fiber blanket with a thickness of 20mm in the temperature range of 900℃-501℃ is 3.00℃ / min, the temperature drop rate in the temperature range of 500℃-301℃ is 1.40℃ / min, the temperature drop rate in the temperature range of 300℃-101℃ is 0.40℃ / min, and the temperature drop rate in the temperature range of 100℃-25℃ is 0.13℃ / min.

[0011] Optionally, the temperature drop rate table of the glass fiber cloth includes glass fiber cloths of thickness specifications of 0.2 mm, 0.4 mm, and 0.6 mm; the temperature drop rate of the glass fiber cloth of 0.2 mm thickness in the temperature range of 900°C-501°C is 17.5°C / min, the temperature drop rate in the temperature range of 500°C-301°C is 6.10°C / min, the temperature drop rate in the temperature range of 300°C-101°C is 1.60°C / min, and the temperature drop rate in the temperature range of 100°C-25°C is 0.20°C / min; the temperature drop rate of the glass fiber cloth of 0.4 mm thickness in the temperature range of 900°C-501°C is 17.2°C / min, and the temperature drop rate in the temperature range of 500°C-301°C is 6.10°C / min, The temperature drop rate in the temperature range of 0℃-301℃ is 6.00℃ / min, the temperature drop rate in the temperature range of 300℃-101℃ is 1.70℃ / min, and the temperature drop rate in the temperature range of 100℃-25℃ is 0.15℃ / min; the temperature drop rate of 0.6mm thick glass fiber cloth in the temperature range of 900℃-501℃ is 16.9℃ / min, the temperature drop rate in the temperature range of 500℃-301℃ is 5.90℃ / min, the temperature drop rate in the temperature range of 300℃-101℃ is 1.90℃ / min, and the temperature drop rate in the temperature range of 100℃-25℃ is 0.16℃ / min.

[0012] Optionally, the method also includes: heating multiple identical titanium alloy forging specimens to a preset temperature; covering multiple titanium alloy forging specimens with insulation sleeves of different materials and specifications; inserting multiple temperature-controlling thermocouples into the slots of each titanium alloy forging specimen respectively; connecting multiple temperature-controlling thermocouples to a control instrument; recording the temperature collected by each temperature-controlling thermocouple displayed by the control instrument; based on the temperature displayed by the control instrument, drawing a curve of the temperature change over time of the titanium alloy forging specimen covered by each insulation sleeve; and determining a temperature drop rate table based on the curve.

[0013] Optionally, inserting a plurality of temperature-controlling couples into the slots of each titanium alloy forging sample respectively comprises: wrapping the plurality of temperature-controlling couples with asbestos respectively and inserting the couples into the slots of each titanium alloy forging sample.

[0014] Optionally, the titanium alloy forging is a β-type titanium alloy forging.

[0015] In a second aspect, the present application provides a titanium alloy forging, which is forged by the titanium alloy forging method described in the first aspect above.

[0016] The beneficial effects of the second aspect above can be referred to those described in the first aspect above and will not be elaborated on again. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the dimensions of a TC4 forging specimen provided in an embodiment of the present application; Figure 2 A schematic diagram of a coating method provided in an embodiment of the present application; Figure 3 A schematic diagram of the placement of objects in a furnace provided in an embodiment of the present application; Figure 4 A schematic diagram of temperature measurement provided in an embodiment of the present application; Figure 5 A data graph provided for an embodiment of the present application; Figure 6 Schematic diagram of the titanium alloy forging method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0020] It should be noted that, in the embodiments of the present application, words such as "exemplarily" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplarily" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplarily" or "for example" is intended to present related concepts in a specific way.

[0021] In order to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish between identical items or similar items with basically the same functions and effects. Those skilled in the art can understand that words such as "first" and "second" do not limit the quantity and execution order.

[0022] Titanium alloys are widely used in aircraft parts. Although forged titanium alloys have excellent performance, their thermomechanical processing technology is complex for complex structural parts, there is springback during processing, long cycle and low material utilization.

[0023] The thermal insulation materials used in the forging process of titanium alloy forgings play a key role in product forming. For example, thermal insulation materials with excellent performance can not only ensure the smooth forging, but also extend the life of the die and improve the forming quality of the workpiece. Inappropriate thermal insulation materials lead to poor thermal insulation effects, which not only hinder the forging forming and accelerate the loss of die life, but also easily cause cold die effect. The cold die structure, i.e. the surface coarse grain structure, affects the uniformity of the forging structure and greatly reduces the plasticity and toughness of the product.

[0024] The insulation material used in the forging process of titanium alloy forgings is usually an insulation bag. The insulation bag can be used to cover the surface of the forging with refractory materials for insulation forging to address the problem of narrow deformation temperature and high deformation resistance of the forging material. This can extend the effective deformation time and increase the deformation amount per fire. Different insulation materials have different insulation effects.

[0025] Therefore, how to choose suitable insulation materials (or insulation bags) becomes our need.

[0026] First, the commonly used centralized insulation packages are introduced.

[0027] (1) Ceramic fiber blanket.

[0028] Applicable to temperatures below 1000℃, softening point temperature up to 1300℃, also known as aluminum silicate fiber blanket, the main component is aluminum oxide. Ceramic fiber has excellent thermal insulation properties of general low thermal conductivity materials, and also has long-term excellent heat resistance at high temperatures.

[0029] (2) Fiberglass cloth.

[0030] It is suitable for high temperature environments of 500℃~900℃, has excellent high temperature resistance, low thermal conductivity, chemical corrosion resistance and other characteristics, and is used in insulation, heat preservation, sealing, flame retardancy and other fields. Glass fiber cloth has good flexibility and plasticity, is easy to install and process, and is suitable for insulation of various shapes and complex environments.

[0031] The insulation bag should not contain any liquid components. Liquid components can easily cause cracks on the mold cavity surface and the forging surface due to uneven heat. No volatile gas is generated at high temperature during the formation of the protective layer. Gas in a closed cavity or closed die forging hinders the flow of metal and affects the filling effect.

[0032] In order to analyze the thermal insulation performance of the thermal insulation bag, a test analysis can be carried out. The test analysis can specifically include the following steps: 1) Prepare titanium alloy forging specimens.

[0033] Titanium alloy forging sample material: TC4; quantity: 4 pieces; the incoming materials must be marked with the serial numbers "1, 2, 3, 4" on the upper end surface.

[0034] For example, Figure 1 This is a schematic diagram of the TC4 forging sample size provided in the embodiment of the present application. Figure 1 As shown, the TC4 forging specimen is a cylinder with a diameter of 80mm and a height of 90mm±1mm. The corners of the cylinder are rounded with R10. A slot with a diameter of 7mm and a depth of 45mm is opened 45mm to the right of the center line of the cylinder. The corners of the slot are rounded with R2.

[0035] 2) Coating.

[0036] According to the number of channels of the temperature control instrument, each group of heating tests is divided into 4 samples. Before heating, the samples are wrapped with insulation bags, including the front samples, which are allowed to be preheated to 300°C and sprinkled with adhesive for adhering the insulation coating.

[0037] For example, the material information of the thermal insulation bag may be specifically shown in the following Table 1: Table 1 As shown in Table 1, the No. 1 titanium alloy forging specimen can be covered with a single layer of glass fiber cloth with a thickness of 0.2 mm, the No. 2 titanium alloy forging specimen can be covered with a single layer of ceramic fiber blanket with a thickness of 6 mm, the No. 3 titanium alloy forging specimen can be covered with a single layer of ceramic fiber blanket with a thickness of 12.5 mm, and the No. 4 titanium alloy forging specimen can be covered with a single layer of ceramic fiber blanket with a thickness of 20 mm. All insulation covers require that the exposed metal surface is not visible.

[0038] For example, Figure 2 This is a schematic diagram of the coating method provided in the embodiment of the present application. Figure 2 As shown, taking a ceramic fiber blanket as an example, the ceramic fiber blanket can completely wrap the sample.

[0039] 3) Preparation before heating.

[0040] Before taking out of the furnace, prepare a 20mm thick ceramic fiber blanket and place it on a flat ground. The length of the fiber blanket should ensure that the interval between the 4 load materials is more than 100mm.

[0041] Prepare 4 temperature-controlling thermocouples in advance and connect the 4 channels of the control instrument. Place the control instrument flatly near the prepared ceramic fiber blanket to facilitate timely insertion of the thermocouple into the slot hole of the load material. Also wrap the thermocouple probe with asbestos in advance to ensure that it will not fall off when inserted into the slot hole of the load material to enhance the sealing.

[0042] 4) Heating.

[0043] Heating temperature: 980℃; heating with the furnace, holding time after reaching temperature: 3h (including heat-through time). After the transfer of each titanium alloy forging sample out of the furnace, insert the thermocouple and connect the instrument to start recording the temperature. When loading the furnace, the slot position is upward, and the interval between materials is 100mm.

[0044] For example, Figure 3 This is a schematic diagram of the actual placement of objects in the furnace provided in the embodiment of this application. Figure 3 , Figure 3 The figure shows the placement of four titanium alloy forging samples in the furnace, where the four titanium alloy forging samples are placed at intervals.

[0045] 5) Take it out of the oven and cool it down.

[0046] For example, Figure 4 This is a temperature measurement schematic diagram provided in the embodiment of the present application. Figure 4 As shown, after taking out of the furnace, the titanium alloy forging samples can be placed in sequence according to the serial numbers 1 to 4, which is convenient for the instrument worker to record. The time from taking out of the furnace to transferring to the ceramic fiber blanket is ≤30s, and the interval between two adjacent titanium alloy forging samples is ≥100mm.

[0047] 6) Data collection and analysis.

[0048] The temperature drop data of the loaded forging for 1010min was monitored by a four-channel temperature control instrument. The temperature control instrument recorded the temperature of the load thermocouple every 10min, and a total of 102 sets of data were recorded.

[0049] For example, the experimental temperature drop rate of the ceramic fiber blanket can be obtained according to 102 sets of data, as shown in the following Table 2: Table 2 As shown in Table 2, the temperature drop rate of the 6 mm ceramic fiber blanket coated titanium alloy forging specimen is 4.74 ° C / min at ≥ 500 ° C, 1.97 ° C / min at 500 ° C - 301 ° C, 0.61 ° C / min at 300 ° C - 101 ° C, and 0.14 ° C / min at 100 ° C - 25 ° C.

[0050] The temperature drop rate of the titanium alloy forging specimen coated with 12.5mm ceramic fiber blanket is 3.42℃ / min at ≥500℃, 1.46℃ / min at 500℃-301℃, 0.46℃ / min at 300℃-101℃, and 0.13℃ / min at 100℃-25℃.

[0051] The temperature drop rate of the titanium alloy forging specimen covered with a 20mm ceramic fiber blanket is 2.97℃ / min at ≥500℃, 1.45℃ / min at 500℃-301℃, 0.39℃ / min at 300℃-101℃, and 0.13℃ / min at 100℃-25℃.

[0052] For example, the temperature curve of each titanium alloy forging sample covered by the insulation bag is plotted based on the 102 sets of recorded data. Figure 5 This is a data curve diagram provided by the embodiment of the present application. Figure 5 As shown, from bottom to top are the temperature variation curves of the titanium alloy forging sample No. 1 covered with 0.2 mm glass fiber cloth, the titanium alloy forging sample No. 2 covered with 5 mm ceramic fiber blanket, the titanium alloy forging sample No. 3 covered with 12.5 mm ceramic fiber blanket, and the titanium alloy forging sample No. 4 covered with 20 mm ceramic fiber blanket. Figure 5 It can be seen that the temperature of 0.2 mm glass fiber cloth drops to 50°C in 2 hours, which is close to the natural cooling state of the forging. In the high temperature stage, the cooling rate of the test blank decreases with the increase of the thickness of the ceramic fiber blanket, until the cooling rate of the ceramic fiber blanket of each thickness in the temperature range of 100°C to 25°C reaches the same level.

[0053] Based on the understanding of the above embodiments, the present application provides a titanium alloy forging method. Figure 6 Schematic diagram of the titanium alloy forging method provided in the embodiment of the present application. Figure 6 As shown, the method includes the following steps: S101. According to the required cooling rate in the forging process requirements of the titanium alloy forging, select the target insulation package corresponding to the titanium alloy forging from the temperature drop rate table.

[0054] Among them, the temperature drop rate table is used to indicate the temperature drop rate when titanium alloy forgings are coated with different insulation packages.

[0055] Optionally, as shown in Table 2 above, the temperature drop rate table may include the temperature drop rate of each thermal insulation package in different temperature ranges.

[0056] In a possible implementation, the above S101 may include the following steps: Step 1a: According to the forging temperature in the forging process requirements of the titanium alloy forging, the target temperature range of the forging temperature is determined from the temperature drop rate table.

[0057] Step 2a: within the target temperature range of the temperature drop rate table, determine the insulation package whose temperature drop rate matches the required cooling rate as the target insulation package.

[0058] The temperature drop rate matches the required cooling rate, which means that the two are the same or similar. Similar, for example, can be a difference less than a preset threshold. The preset threshold can be, for example, 1°C / min, 2°C / min, or 3°C / min. The embodiment of the present application does not limit the specific value of the preset threshold.

[0059] Optionally, the temperature drop rate table may include a ceramic fiber blanket temperature drop rate table and a glass fiber cloth temperature drop rate table.

[0060] The temperature drop rate table of ceramic fiber blankets may include ceramic fiber blankets of various thickness specifications, and the temperature drop rate of each ceramic fiber blanket of thickness specifications in different temperature ranges. The temperature drop rate table of glass fiber cloths may include glass fiber cloths of various thickness specifications, and the temperature drop rate of each glass fiber cloth of thickness specifications in different temperature ranges.

[0061] For example, the temperature drop rate table of the ceramic fiber blanket may be specifically shown in the following Table 3: Table 3 As shown in Table 3, the temperature drop rate table of the ceramic fiber blanket includes ceramic fiber blankets with thickness specifications of 6 mm, 12.5 mm, and 20 mm.

[0062] The temperature drop rate of the ceramic fiber blanket with a thickness of 6mm is 4.70℃ / min in the temperature range of 900℃-501℃, 2.00℃ / min in the temperature range of 500℃-301℃, 0.60℃ / min in the temperature range of 300℃-101℃, and 0.14℃ / min in the temperature range of 100℃-25℃.

[0063] The temperature drop rate of the ceramic fiber blanket with a thickness of 12.5mm in the temperature range of 900℃-501℃ is 3.50℃ / min, the temperature drop rate in the temperature range of 500℃-301℃ is 1.50℃ / min, the temperature drop rate in the temperature range of 300℃-101℃ is 0.50℃ / min, and the temperature drop rate in the temperature range of 100℃-25℃ is 0.13℃ / min.

[0064] The temperature drop rate of the ceramic fiber blanket with a thickness of 20mm in the temperature range of 900℃-501℃ is 3.00℃ / min, the temperature drop rate in the temperature range of 500℃-301℃ is 1.40℃ / min, the temperature drop rate in the temperature range of 300℃-101℃ is 0.40℃ / min, and the temperature drop rate in the temperature range of 100℃-25℃ is 0.13℃ / min.

[0065] For example, the temperature drop rate table of the glass fiber cloth can be specifically shown in the following Table 4: Table 4 As shown in Table 4, the temperature drop rate table of the glass fiber cloth includes glass fiber cloths with thickness specifications of 0.2 mm, 0.4 mm, and 0.6 mm.

[0066] The temperature drop rate of glass fiber cloth with a thickness of 0.2mm in the temperature range of 900℃-501℃ is 17.5℃ / min, the temperature drop rate in the temperature range of 500℃-301℃ is 6.10℃ / min, the temperature drop rate in the temperature range of 300℃-101℃ is 1.60℃ / min, and the temperature drop rate in the temperature range of 100℃-25℃ is 0.20℃ / min.

[0067] The temperature drop rate of glass fiber cloth with a thickness of 0.4mm in the temperature range of 900℃-501℃ is 17.2℃ / min, the temperature drop rate in the temperature range of 500℃-301℃ is 6.00℃ / min, the temperature drop rate in the temperature range of 300℃-101℃ is 1.70℃ / min, and the temperature drop rate in the temperature range of 100℃-25℃ is 0.15℃ / min.

[0068] The temperature drop rate of glass fiber cloth with a thickness of 0.6mm in the temperature range of 900℃-501℃ is 16.9℃ / min, the temperature drop rate in the temperature range of 500℃-301℃ is 5.90℃ / min, the temperature drop rate in the temperature range of 300℃-101℃ is 1.90℃ / min, and the temperature drop rate in the temperature range of 100℃-25℃ is 0.16℃ / min.

[0069] S102. Use a target thermal insulation bag to cover the titanium alloy forging for forging.

[0070] Optionally, the titanium alloy forging may specifically be a β-type titanium alloy forging.

[0071] The titanium alloy forging method provided in the embodiment of the present application can select the target insulation package corresponding to the titanium alloy forging from the temperature drop rate table according to the required cooling rate in the forging process requirements of the titanium alloy forging, and the temperature drop rate table is used to indicate the temperature drop rate when the titanium alloy forging is covered with different insulation packages. In this way, the selected target insulation package is the insulation package that matches the cooling rate required by the process, thereby providing a solution for selecting a suitable insulation material.

[0072] In some embodiments, before the above S101, a temperature drop rate table may be obtained by experiment. In this case, before the above S101, the method may further include the following steps: Step 1b: heating a plurality of identical titanium alloy forging specimens to a preset temperature.

[0073] Step 1b can refer to 1) and 2) in the above test analysis, which will not be repeated here. The preset temperature can be, for example, 300°C in 2) above. The specific size of the titanium alloy forging sample can refer to the above Figure 1 As shown, no further description is given here.

[0074] Step 2b: using thermal insulation packages of different materials and specifications to cover a plurality of titanium alloy forging specimens.

[0075] Step 2b can refer to the description in 2) of the above experimental analysis and will not be repeated here.

[0076] Step 3b: insert a plurality of temperature-controlled thermocouples into the slots of each titanium alloy forging sample.

[0077] Among them, a plurality of temperature-controlled thermocouples are connected to a control instrument.

[0078] Step 3b can refer to the description in 3) of the above experimental analysis and will not be repeated here.

[0079] Step 4b, record the temperature collected by each temperature-controlling thermocouple displayed by the control instrument.

[0080] Step 4b can refer to 6) in the above experimental analysis and will not be repeated here.

[0081] Step 5b: based on the temperature displayed on the control instrument, draw a curve of the temperature change over time of each insulation bag corresponding to the titanium alloy forging sample covered.

[0082] The curve in step 5b can refer to the above Figure 5 As shown, no further description is given here.

[0083] Step 6b: Determine the temperature drop rate table based on the curve.

[0084] Among them, the temperature drop rate table can refer to the above-mentioned Table 3 and Table 4, which will not be repeated here.

[0085] The technical solution of the embodiment of the present application is introduced above from the perspective of method. In an exemplary embodiment, the embodiment of the present application further provides a titanium alloy forging, which can be forged by the titanium alloy forging method in the above embodiment.

[0086] Based on the understanding of the above embodiments, the following conclusions can be drawn: 1) Ceramic fiber blankets exhibit remarkable thermal insulation properties. Test data show that as the thickness of the fiber blanket increases, the cooling rate decreases, which can effectively delay heat loss.

[0087] 2) In the high temperature range of 900℃~501℃, the cooling rate of the 20mm thick fiber blanket is much lower than that of the 6mm thick fiber blanket, until the cooling rates of ceramic fiber blankets of different thicknesses reach the same level in the temperature range of 100℃~25℃.

[0088] 3) As a thermal insulation material for titanium alloy forgings, ceramic fiber blanket has better thermal insulation effect than glass fiber cloth, especially in high temperature environment, and its thermal conductivity is very low.

[0089] Although the present application has been described in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations may be made thereto without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are merely exemplary illustrations of the present application as defined by the appended claims, and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0090] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A titanium alloy forging method, characterized in that: The method comprises: According to the required cooling rate in the forging process requirements of the titanium alloy forging, a target insulation package corresponding to the titanium alloy forging is selected from a temperature drop rate table; the temperature drop rate table is used to indicate the temperature drop rate when the titanium alloy forging is covered with different insulation packages; The titanium alloy forging is forged by covering the titanium alloy forging with the target thermal insulation jacket.

2. The method according to claim 1, characterized in that The temperature drop rate table includes the temperature drop rate of each insulation package in different temperature ranges.

3. The method according to claim 2, characterized in that The step of selecting a target insulation package corresponding to the titanium alloy forging from a temperature drop rate table according to the required cooling rate in the forging process requirements of the titanium alloy forging comprises: According to the forging temperature in the forging process requirements of the titanium alloy forging, determining the target temperature range of the forging temperature from the temperature drop rate table; Within the target temperature range of the temperature drop rate table, determine the insulation package whose temperature drop rate matches the required cooling rate as the target insulation package.

4. The method according to claim 1, characterized in that: The temperature drop rate table includes a ceramic fiber blanket temperature drop rate table and a glass fiber cloth temperature drop rate table; The ceramic fiber blanket temperature drop rate table includes ceramic fiber blankets of various thickness specifications, and the temperature drop rate of each ceramic fiber blanket of each thickness specification in different temperature ranges; The glass fiber cloth temperature drop rate table includes glass fiber cloths of various thickness specifications, and the temperature drop rate of the glass fiber cloth of each thickness specification in different temperature ranges.

5. The method according to claim 4, characterized in that The ceramic fiber blanket temperature drop rate table includes ceramic fiber blankets with thickness specifications of 6mm, 12.5mm, and 20mm; The temperature drop rate of the ceramic fiber blanket with a thickness of 6 mm in the temperature range of 900°C-501°C is 4.70°C / min, the temperature drop rate in the temperature range of 500°C-301°C is 2.00°C / min, the temperature drop rate in the temperature range of 300°C-101°C is 0.60°C / min, and the temperature drop rate in the temperature range of 100°C-25°C is 0.14°C / min; The temperature drop rate of the ceramic fiber blanket with a thickness of 12.5 mm in the temperature range of 900°C-501°C is 3.50°C / min, the temperature drop rate in the temperature range of 500°C-301°C is 1.50°C / min, the temperature drop rate in the temperature range of 300°C-101°C is 0.50°C / min, and the temperature drop rate in the temperature range of 100°C-25°C is 0.13°C / min; The temperature drop rate of the ceramic fiber blanket with a thickness of 20 mm in the temperature range of 900°C-501°C is 3.00°C / min, the temperature drop rate in the temperature range of 500°C-301°C is 1.40°C / min, the temperature drop rate in the temperature range of 300°C-101°C is 0.40°C / min, and the temperature drop rate in the temperature range of 100°C-25°C is 0.13°C / min.

6. The method according to claim 4, characterized in that The temperature drop rate table of the glass fiber cloth includes glass fiber cloths with thickness specifications of 0.2mm, 0.4mm, and 0.6mm; The temperature drop rate of the glass fiber cloth with a thickness of 0.2 mm in the temperature range of 900°C-501°C is 17.5°C / min, the temperature drop rate in the temperature range of 500°C-301°C is 6.10°C / min, the temperature drop rate in the temperature range of 300°C-101°C is 1.60°C / min, and the temperature drop rate in the temperature range of 100°C-25°C is 0.20°C / min; The temperature drop rate of the glass fiber cloth with a thickness of 0.4 mm in the temperature range of 900°C-501°C is 17.2°C / min, the temperature drop rate in the temperature range of 500°C-301°C is 6.00°C / min, the temperature drop rate in the temperature range of 300°C-101°C is 1.70°C / min, and the temperature drop rate in the temperature range of 100°C-25°C is 0.15°C / min; The temperature drop rate of the glass fiber cloth with a thickness of 0.6 mm in the temperature range of 900°C-501°C is 16.9°C / min, the temperature drop rate in the temperature range of 500°C-301°C is 5.90°C / min, the temperature drop rate in the temperature range of 300°C-101°C is 1.90°C / min, and the temperature drop rate in the temperature range of 100°C-25°C is 0.16°C / min.

7. The method according to claim 1, characterized in that The method further comprises: heating a plurality of identical titanium alloy forging specimens to a preset temperature; Using thermal insulation packages of different materials and specifications to cover the plurality of titanium alloy forging specimens; Inserting a plurality of temperature-controlling thermocouples into the slots of each titanium alloy forging sample respectively; the plurality of temperature-controlling thermocouples are connected to a control instrument; Record the temperature collected by each temperature-controlling thermocouple displayed by the control instrument; Based on the temperature displayed by the control instrument, a curve of the temperature change over time of the titanium alloy forging sample covered by each insulation bag corresponding to the insulation bag is drawn; According to the curve, the temperature drop rate table is determined.

8. The method according to claim 7, characterized in that A plurality of temperature-controlled thermocouples are respectively inserted into the slots of each titanium alloy forging specimen, including: A plurality of temperature-controlling electric couples are respectively wrapped with asbestos and inserted into the slots of each titanium alloy forging sample.

9. The method according to any one of claims 1 to 8, characterized in that: The titanium alloy forging is a β-type titanium alloy forging.

10. A titanium alloy forging, characterized in that: The titanium alloy forging is forged by the titanium alloy forging method according to any one of claims 1 to 9.

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