Titanium 3D curved surface copy modeling material processing technology

Abstract

The application discloses a titanium material 3D curved surface imitation material processing technology and belongs to the technical field of titanium material processing. The processing technology comprises the following steps: peeling treatment is performed on the titanium material to remove surface defects; hot rolling processing is performed on the peeled titanium material to obtain a crude material A with a trapezoidal cross section; annealing treatment is performed on the crude material A to eliminate stress; cold-drawing precise size processing is performed on the annealed crude material A to obtain a material B with a trapezoidal cross section and an arc-shaped side of the trapezoidal cross section, so that the curved surface profile requirement is met; the material B is subjected to annealing and cutting treatment to eliminate residual stress, and a material C with a smaller volume is obtained; the material C is subjected to precise size cutting to obtain a formed material D; the formed material D is subjected to burnishing treatment to remove burrs and shawls generated in the cutting; and surface treatment is performed, so that the titanium material 3D curved surface imitation material with excellent tensile strength is obtained.

Description

Technical Field

[0001] This invention belongs to the field of titanium material processing technology, specifically relating to a titanium 3D curved surface contouring material processing technology. Background Technology

[0002] Titanium is widely used in aerospace, automotive, medical device, and chemical industries, and is an important engineering material. Titanium is mainly produced through processes such as smelting, forging, rolling, and extrusion. Common products include titanium plates, tubes, and rods. These processes not only allow titanium to achieve ideal shapes and dimensions but also allow for further optimization of its performance by adjusting process parameters. During processing, improper temperature control during heat treatment can increase the grain boundary slip velocity at high temperatures, leading to rapid termination of slip dislocations and a significant decrease in tensile strength, making titanium difficult to process and shape. Furthermore, different processing techniques can affect the structure and properties of titanium. For example, cold drawing and annealing can cause stress concentration, resulting in excessively high local stress and reducing overall tensile strength. The reduction in the tensile strength of titanium negatively impacts product quality, requiring attention and timely, effective repair or replacement measures. Summary of the Invention

[0003] This invention discloses a processing technology for 3D curved surface modeling materials made of titanium, belonging to the field of titanium processing technology. The processing technology includes the following steps: peeling the titanium material to remove surface defects; hot rolling the peeled titanium material to obtain a rough material A with a trapezoidal cross-section; annealing the rough material A to eliminate stress; cold drawing the annealed rough material A to obtain a material B with a trapezoidal cross-section and one side of the trapezoid being an arc-shaped edge, meeting the requirements for curved surface contour; annealing and hedging the material B to eliminate residual stress and obtain a material C with a smaller volume; precisely cutting the material C to obtain a shaped material D; smoothing the shaped material D to remove burrs and flash generated during cutting; and surface treatment to obtain a 3D curved surface modeling material made of titanium with excellent tensile strength.

[0004] The technical problem to be solved by this invention is to prepare titanium 3D curved surface modeling materials with excellent tensile strength.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A 3D curved surface modeling process for titanium materials, the process comprising the following steps:

[0007] S1. Peel the titanium material to remove surface defects;

[0008] S2. The peeled titanium material is hot-rolled to obtain a rough material A with a trapezoidal cross-section;

[0009] S3. Anneal the coarse material A to relieve stress. The tensile strength range of the annealed coarse material A is:

[0010] S4. After annealing, the rough material A is cold-drawn for precise dimensional processing to obtain material B with a trapezoidal cross-section and one side of the trapezoid being an arc edge, which meets the surface profile requirements.

[0011] S5. Anneal and cut material B to eliminate residual stress and obtain material C with a smaller volume.

[0012] S6. Cut material C to precise dimensions to obtain shaped material D;

[0013] S7. Perform a smoothing treatment on the molding material D to remove burrs and burrs generated during cutting;

[0014] S8. Surface treatment, which yields the titanium 3D curved surface modeling material.

[0015] As a preferred technical solution of the present invention, in step S2, the hot rolling process includes hot rolling billet opening, hot rolling second heat treatment and hot rolling third heat treatment.

[0016] As a preferred embodiment of the present invention, the hot rolling blanking temperature is 840-860℃.

[0017] As a preferred embodiment of the present invention, the hot rolling second heat treatment temperature is 860-980℃.

[0018] As a preferred embodiment of the present invention, the hot rolling temperature is 840-860℃.

[0019] As a preferred embodiment of the present invention, in step S3, the annealing temperature is 680-750℃.

[0020] As a preferred technical solution of the present invention, in step S4, the cold drawing includes large curvature cold drawing and small curvature cold drawing.

[0021] As a preferred technical solution of the present invention, the tensile force is controlled between 20-45MPa during the large curvature cold drawing process, the synchronous moving speed of the clamps at both ends of the stretching machine is controlled between 15-35mm / s, and the material is unloaded when the large curvature cold drawing radius of the annealed rough material A is consistent with the mold.

[0022] As a preferred technical solution of the present invention, a section of the rough material A that needs to be partially formed after being cold-drawn with large curvature is fixed in the chuck of the stretching machine, and then locally clamped and fixed to the forming mold by tooling for cold drawing with small curvature.

[0023] During the small curvature cold drawing process, the tensile force is controlled between 12-20 MPa and kept constant. The material is unloaded when the local small curvature radius of the rough material A after large curvature cold drawing is consistent with the mold.

[0024] As a preferred embodiment of the present invention, the surface treatment includes the following steps:

[0025] The slickened molding material D is polished, then immersed in treatment solution M for 16-24 hours, taken out and cleaned, then immersed in treatment solution N at 60-65℃ for 8-10 hours, taken out, cleaned, and dried to complete the surface treatment.

[0026] The mass ratio of the slickering molding material D, the treatment liquid M, and the treatment liquid N is 1:80-100:80-100;

[0027] The treatment solution M comprises the following components in parts by weight: 0.4-0.6 parts by weight of sodium chloride; 0.7-0.8 parts by weight of calcium chloride; 0.4-0.5 parts by weight of potassium chloride; 0.7-0.9 parts by weight of sodium dihydrogen phosphate; 0.5-0.7 parts by weight of sodium fluoride; 0.002-0.003 parts by weight of sodium sulfide; and 1000 parts by weight of deionized water.

[0028] The treatment solution N comprises the following components in parts by weight: 2-3 parts by weight of cerium chloride; 5-6 parts by weight of potassium permanganate solution with a concentration of 2.5 g / L; 0.5-0.8 parts by weight of sodium tetraborate; 1-2 parts by weight of lanthanum chloride; 1-2 parts by weight of europium chloride; and 200 parts by weight of deionized water.

[0029] The beneficial effects of this invention are:

[0030] The titanium 3D curved surface profiling material processing technology disclosed in this invention optimizes the processing parameters, resulting in titanium 3D curved surface profiling materials with good tensile strength, good plasticity, easy processing and forming, and high-quality products. At the same time, through surface treatment, a corrosion-resistant protective film is formed on the surface of the titanium material, improving the corrosion resistance and durability of the titanium material. Detailed Implementation

[0031] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with embodiments, is provided below.

[0032] Example 1

[0033] A 3D curved surface modeling process for titanium materials, the process comprising the following steps:

[0034] S1. Peel the titanium material to remove surface defects;

[0035] S2. The peeled titanium material is hot-rolled to obtain a rough material A with a trapezoidal cross-section. The hot rolling process includes a 30-minute hot rolling initial treatment, a 4-hour hot rolling secondary treatment, and a 2-hour hot rolling tertiary treatment. The hot rolling initial treatment temperature is 840℃, and the tensile strength is 735MPa. The hot rolling secondary treatment temperature is 980℃, and the tensile strength is 659MPa. The hot rolling tertiary treatment temperature is 840℃, and the tensile strength is 742MPa.

[0036] S3. Anneal the crude material A for 2 hours to relieve stress; the annealing temperature is 660℃ and the tensile strength is 928MPa.

[0037] S4. After annealing, the rough material A is cold-drawn for precise dimensional processing to obtain material B with a trapezoidal cross-section and one side of the trapezoid being an arc edge, which meets the surface profile requirements.

[0038] The cold drawing includes large curvature cold drawing and small curvature cold drawing; during the large curvature cold drawing forming process, the tensile force is controlled between 20MPa, the synchronous moving speed of the clamps at both ends of the stretching machine is controlled between 15mm / s, and the material is unloaded when the large curvature cold drawing radius of the annealed rough material A is consistent with the mold.

[0039] The section of the rough material A that needs to be partially formed after being cold-drawn with a large curvature is fixed in the chuck of the stretching machine and then locally clamped and fixed to the forming die by tooling for cold drawing with a small curvature.

[0040] During the small curvature cold drawing process, the tensile force is controlled within 12 MPa and kept constant. The material is unloaded when the local small curvature radius of the rough material A after large curvature cold drawing is consistent with the mold.

[0041] S5. Anneal and cut material B to eliminate residual stress and obtain material C with a smaller volume.

[0042] S6. Cut material C to precise dimensions to obtain shaped material D;

[0043] S7. Perform a smoothing treatment on the molding material D to remove burrs and burrs generated during cutting;

[0044] S8. Surface treatment, thus obtaining the titanium 3D curved surface modeling material;

[0045] The surface treatment includes the following steps:

[0046] The slickened molding material D is polished, then immersed in treatment solution M for 16 hours, taken out and cleaned, then immersed in treatment solution N at 60℃ for 8 hours, taken out and cleaned, and dried to complete the surface treatment.

[0047] The mass ratio of the slickering molding material D, the treatment liquid M, and the treatment liquid N is 1:80:80;

[0048] The treatment solution M comprises the following components in parts by weight: 0.4 parts sodium chloride; 0.7 parts calcium chloride; 0.4 parts potassium chloride; 0.7 parts sodium dihydrogen phosphate; 0.5 parts sodium fluoride; 0.002 parts sodium sulfide; and 1000 parts deionized water.

[0049] The treatment solution N comprises the following components in parts by weight: 2 parts cerium chloride; 5 parts potassium permanganate solution with a concentration of 2.5 g / L; 0.5 parts sodium tetraborate; 1 part lanthanum chloride; 1 part europium chloride; and 200 parts deionized water.

[0050] Example 2

[0051] A 3D curved surface modeling process for titanium materials, the process comprising the following steps:

[0052] S1. Peel the titanium material to remove surface defects;

[0053] S2. The peeled titanium material is hot-rolled to obtain a rough material A with a trapezoidal cross-section. The hot rolling process includes a 30-minute hot rolling initial treatment, a 4-hour hot rolling secondary treatment, and a 2-hour hot rolling tertiary treatment. The hot rolling initial treatment temperature is 850℃, and the tensile strength is 724MPa. The hot rolling secondary treatment temperature is 990℃, and the tensile strength is 653MPa. The hot rolling tertiary treatment temperature is 850℃, and the tensile strength is 728MPa.

[0054] S3. Anneal the crude material A for 2 hours to relieve stress; the annealing temperature is 670℃ and the tensile strength is 922MPa.

[0055] S4. After annealing, the rough material A is cold-drawn for precise dimensional processing to obtain material B with a trapezoidal cross-section and one side of the trapezoid being an arc edge, which meets the surface profile requirements.

[0056] The cold drawing includes large curvature cold drawing and small curvature cold drawing; during the large curvature cold drawing forming process, the tensile force is controlled between 32MPa, the synchronous moving speed of the clamps at both ends of the stretching machine is controlled between 25mm / s, and the material is unloaded when the large curvature cold drawing radius of the annealed rough material A is consistent with the mold.

[0057] The section of the rough material A that needs to be partially formed after being cold-drawn with a large curvature is fixed in the chuck of the stretching machine and then locally clamped and fixed to the forming die by tooling for cold drawing with a small curvature.

[0058] During the small curvature cold drawing process, the tensile force is controlled within 16 MPa and kept constant. When the local small curvature radius of the rough material A after large curvature cold drawing is consistent with the mold, the material is unloaded.

[0059] S5. Anneal and cut material B to eliminate residual stress and obtain material C with a smaller volume.

[0060] S6. Cut material C to precise dimensions to obtain shaped material D;

[0061] S7. Perform a smoothing treatment on the molding material D to remove burrs and burrs generated during cutting;

[0062] S8. Surface treatment, thus obtaining the titanium 3D curved surface modeling material;

[0063] The surface treatment includes the following steps:

[0064] The slickened molding material D is polished, then immersed in treatment solution M for 20 hours, taken out and cleaned, then immersed in treatment solution N at 62℃ for 9 hours, taken out and cleaned, and dried to complete the surface treatment.

[0065] The mass ratio of the slickering molding material D, the treatment liquid M, and the treatment liquid N is 1:90:90;

[0066] The treatment solution M comprises the following components in parts by weight: 0.5 parts sodium chloride; 0.75 parts calcium chloride; 0.45 parts potassium chloride; 0.8 parts sodium dihydrogen phosphate; 0.6 parts sodium fluoride; 0.0025 parts sodium sulfide; and 1000 parts deionized water.

[0067] The treatment solution N comprises the following components in parts by weight: 2.5 parts by weight of cerium chloride; 5.5 parts by weight of potassium permanganate solution with a concentration of 2.5 g / L; 0.65 parts by weight of sodium tetraborate; 1.5 parts by weight of lanthanum chloride; 1.5 parts by weight of europium chloride; and 200 parts by weight of deionized water.

[0068] Example 3

[0069] A 3D curved surface modeling process for titanium materials, the process comprising the following steps:

[0070] S1. Peel the titanium material to remove surface defects;

[0071] S2. The peeled titanium material is hot-rolled to obtain a rough material A with a trapezoidal cross-section. The hot rolling process includes a 30-minute hot rolling initial treatment, a 4-hour hot rolling secondary treatment, and a 2-hour hot rolling tertiary treatment. The hot rolling initial treatment temperature is 860℃, and the tensile strength is 718MPa. The hot rolling secondary treatment temperature is 1000℃, and the tensile strength is 646MPa. The hot rolling tertiary treatment temperature is 860℃, and the tensile strength is 721MPa.

[0072] S3. Anneal the crude material A for 2 hours to relieve stress; the annealing temperature is 680℃ and the tensile strength is 908MPa.

[0073] S4. After annealing, the rough material A is cold-drawn for precise dimensional processing to obtain material B with a trapezoidal cross-section and one side of the trapezoid being an arc edge, which meets the surface profile requirements.

[0074] The cold drawing includes large curvature cold drawing and small curvature cold drawing; during the large curvature cold drawing forming process, the tensile force is controlled between 45MPa, the synchronous moving speed of the clamps at both ends of the stretching machine is controlled between 35mm / s, and the material is unloaded when the large curvature cold drawing radius of the annealed rough material A is consistent with the mold.

[0075] The section of the rough material A that needs to be partially formed after being cold-drawn with a large curvature is fixed in the chuck of the stretching machine and then locally clamped and fixed to the forming die by tooling for cold drawing with a small curvature.

[0076] During the small curvature cold drawing process, the tensile force is controlled within 20 MPa and kept constant. The material is unloaded when the local small curvature radius of the rough material A after large curvature cold drawing is consistent with the mold.

[0077] S5. Anneal and cut material B to eliminate residual stress and obtain material C with a smaller volume.

[0078] S6. Cut material C to precise dimensions to obtain shaped material D;

[0079] S7. Perform a smoothing treatment on the molding material D to remove burrs and burrs generated during cutting;

[0080] S8. Surface treatment, thus obtaining the titanium 3D curved surface modeling material;

[0081] The surface treatment includes the following steps:

[0082] The slickened molding material D is polished, then immersed in treatment solution M for 24 hours, taken out and cleaned, then immersed in treatment solution N at 65℃ for 10 hours, taken out and cleaned, and dried to complete the surface treatment.

[0083] The mass ratio of the slickering molding material D, the treatment liquid M, and the treatment liquid N is 1:100:100;

[0084] The treatment solution M comprises the following components in parts by weight: 0.6 parts sodium chloride; 0.8 parts calcium chloride; 0.5 parts potassium chloride; 0.9 parts sodium dihydrogen phosphate; 0.7 parts sodium fluoride; 0.003 parts sodium sulfide; and 1000 parts deionized water.

[0085] The treatment solution N comprises the following components in parts by weight: 3 parts cerium chloride; 6 parts potassium permanganate solution with a concentration of 2.5 g / L; 0.8 parts sodium tetraborate; 2 parts lanthanum chloride; 2 parts europium chloride; and 200 parts deionized water.

[0086] Comparative Example 1

[0087] The difference from Example 1 is that in step S2, the hot rolling second heat treatment temperature is 970°C and the tensile strength is 665MPa; resulting in a tensile strength of 731MPa after hot rolling third heat treatment; and a tensile strength of 893MPa after annealing treatment.

[0088] Comparative Example 2

[0089] The difference from Example 1 is that in step S2, the hot rolling second heat treatment temperature is 1010℃ and the tensile strength is 642MPa; resulting in a tensile strength of 753MPa after hot rolling third heat treatment; and a tensile strength of 1004MPa after annealing treatment.

[0090] Comparative Example 3

[0091] The difference from Example 1 is that in step S2, the hot rolling temperature is 830°C and the tensile strength is 756 MPa; the tensile strength after annealing is 1012 MPa.

[0092] Comparative Example 4

[0093] The difference from Example 1 is that in step S2, the hot rolling temperature is 870°C and the tensile strength is 706 MPa; the tensile strength after annealing is 882 MPa.

[0094] Comparative Example 5

[0095] The difference from Example 1 is that the annealing temperature in step S3 is 650°C. The tensile strength is 945 MPa.

[0096] Comparative Example 6

[0097] The difference from Example 1 is that the annealing temperature in step S3 is 690°C. The tensile strength is 895 MPa.

[0098] In the heat treatment process of Examples 1-3, the process includes hot rolling, hot rolling secondary heat treatment, and hot rolling tertiary heat treatment, followed by annealing. After being processed in the hot rolling section, the titanium material with a certain tensile strength enters the hot rolling secondary heat treatment section. The temperature difference between the hot rolling secondary heat treatment section and the hot rolling initial heat treatment section is large. The sudden temperature change disrupts the lattice stability of the titanium material, causing a decrease in its tensile strength. Then, it enters the hot rolling tertiary heat treatment section and the annealing section. The two sudden temperature drops regulate the grain boundary structure and grain orientation, preventing the rapid termination of slip dislocations caused by the increased grain boundary slip velocity at high temperatures. This significantly improves the tensile strength of the titanium material. The optimized grain structure greatly enhances the processing and forming performance of the titanium material, making it easier to perform subsequent forming processes, obtain high-quality products, and reduce material loss and costs.

[0099] In Comparative Example 1, the low heat treatment temperature of the second hot rolling section resulted in incomplete elimination of residual thermal stress, leading to a lower final tensile strength in the titanium material, making it difficult to process and shape. In Comparative Example 2, the higher heat treatment temperature of the second hot rolling section resulted in a higher final tensile strength in the titanium material, increasing processing difficulty and requiring higher costs and time. In Comparative Example 3, the lower heat treatment temperature of the third hot rolling section resulted in a higher final tensile strength in the titanium material, increasing processing difficulty and requiring higher costs and time. In Comparative Example 4, the higher heat treatment temperature of the third hot rolling section resulted in a lower final tensile strength in the titanium material, making it difficult to process and shape. In Comparative Example 5, the lower heat treatment temperature of the annealing section resulted in a higher final tensile strength in the titanium material, increasing processing difficulty and requiring higher costs and time. In Comparative Example 6, the higher heat treatment temperature of the annealing section resulted in a lower final tensile strength in the titanium material, making it difficult to process and shape.

[0100] By controlling the heat treatment temperatures of hot rolling, hot rolling secondary heating, hot rolling tertiary heating, and annealing, titanium materials can achieve good tensile strength after the above processes, making them easy to process and form. This avoids the problems of excessive tensile strength leading to increased processing difficulty or insufficient tensile strength leading to difficulty in processing and forming.

[0101] Comparative Example 7

[0102] The difference from Example 1 is that the surface treatment includes the following steps:

[0103] The smoothed molding material D is polished, then immersed in the treatment solution N at 65℃ for 10 hours, taken out, cleaned, and dried to complete the surface treatment.

[0104] Comparative Example 8

[0105] The difference from Example 1 is that the treatment solution N comprises the following components in parts by mass: 0 parts by mass of cerium chloride; 5 parts by mass of potassium permanganate solution with a concentration of 2.5 g / L; 0.5 parts by mass of sodium tetraborate; 3 parts by mass of lanthanum chloride; 1 part by mass of europium chloride; and 200 parts by mass of deionized water.

[0106] Comparative Example 9

[0107] The treatment solution N comprises the following components in parts by weight: 3 parts cerium chloride; 5 parts potassium permanganate solution with a concentration of 2.5 g / L; 0.5 parts sodium tetraborate; 0 parts lanthanum chloride; 1 part europium chloride; and 200 parts deionized water.

[0108] Comparative Example 10

[0109] The treatment solution N comprises the following components in parts by weight: 2 parts cerium chloride; 5 parts potassium permanganate solution with a concentration of 2.5 g / L; 0.5 parts sodium tetraborate; 2 parts lanthanum chloride; 0 parts europium chloride; and 200 parts deionized water.

[0110] Comparative Example 11

[0111] The treatment solution N comprises the following components by mass: 2 parts cerium chloride; 5.5 parts potassium permanganate solution with a concentration of 2.5 g / L; 0 parts sodium tetraborate; 1 part lanthanum chloride; 1 part europium chloride; and 200 parts deionized water.

[0112] Performance testing

[0113] Corrosion resistance test

[0114] The titanium 3D curved surface modeling materials obtained from Examples 1-3 and Comparative Examples 7-11 were immersed in a 10% sodium chloride solution for 70 days, and the degree of surface corrosion of the titanium 3D curved surface modeling materials was observed.

[0115] The results showed that the titanium 3D curved surface modeling materials of Examples 1-3, after surface treatment, did not show obvious corrosion pits; the titanium 3D curved surface modeling material of Comparative Example 7 showed obvious corrosion pits after 40 days of immersion; and the titanium 3D curved surface modeling materials of Comparative Examples 8-11 showed a few corrosion pits after 70 days of immersion.

[0116] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A processing technology for 3D curved surface contouring of titanium materials, characterized in that, The processing technology includes the following steps: S1. Peel the titanium material; S2. The peeled titanium material is hot-rolled to obtain a rough material A with a trapezoidal cross-section; S3. Anneal the crude material A; S4. After annealing, the rough material A is cold-drawn for precise dimensional processing to obtain material B with a trapezoidal cross-section and one side of the trapezoid being an arc edge. S5. Anneal and cut material B to obtain material C with a smaller volume. S6. Cut material C to precise dimensions to obtain shaped material D; S7. Perform a smoothing treatment on the molding material D to remove burrs and burrs generated during cutting; S8. Surface treatment, thus obtaining the titanium 3D curved surface modeling material; The surface treatment in step S8 includes the following steps: The slickened molding material D is polished, then immersed in treatment solution M for 16-24 hours, taken out and cleaned, then immersed in treatment solution N at 60-65℃ for 8-10 hours, taken out, cleaned, and dried to complete the surface treatment. The mass ratio of the slickering molding material D, the treatment liquid M, and the treatment liquid N is 1:80-100:80-100; The treatment solution M comprises the following components in parts by weight: 0.4-0.6 parts by weight of sodium chloride; 0.7-0.8 parts by weight of calcium chloride; 0.4-0.5 parts by weight of potassium chloride; 0.7-0.9 parts by weight of sodium dihydrogen phosphate; 0.5-0.7 parts by weight of sodium fluoride; 0.002-0.003 parts by weight of sodium sulfide; and 1000 parts by weight of deionized water. The treatment solution N comprises the following components in parts by weight: 2-3 parts by weight of cerium chloride; 5-6 parts by weight of potassium permanganate solution with a concentration of 2.5 g / L; 0.5-0.8 parts by weight of sodium tetraborate; 1-2 parts by weight of lanthanum chloride; 1-2 parts by weight of europium chloride; and 200 parts by weight of deionized water.

2. The titanium 3D curved surface conforming material processing technology according to claim 1, characterized in that, In step S2, the hot rolling process includes hot rolling blanking, hot rolling second heat treatment, and hot rolling third heat treatment.

3. The titanium 3D curved surface conforming material processing technology according to claim 2, characterized in that, The hot-rolled billet processing temperature is 840-860℃.

4. The titanium 3D curved surface conforming material processing technology according to claim 2, characterized in that, The hot rolling second heat treatment temperature is 980-1000℃.

5. The titanium 3D curved surface conforming material processing technology according to claim 2, characterized in that, The hot-rolled three-stage heat treatment temperature is 840-860℃.

6. The titanium 3D curved surface conforming material processing technology according to claim 1, characterized in that, In step S3, the annealing temperature is 660-680℃.

7. The titanium 3D curved surface conforming material processing technology according to claim 1, characterized in that, In step S4, the cold drawing includes large curvature cold drawing and small curvature cold drawing.

8. The titanium 3D curved surface conforming material processing technology according to claim 7, characterized in that, During the large curvature cold drawing process, the tensile force is controlled between 20-45MPa, and the synchronous moving speed of the clamps at both ends of the stretching machine is controlled between 15-35mm / s. The material is unloaded when the large curvature cold drawing radius of the annealed rough material A is consistent with the mold.

9. The titanium 3D curved surface conforming material processing technology according to claim 8, characterized in that, The section of the rough material A that needs to be partially formed after being cold-drawn with a large curvature is fixed in the chuck of the stretching machine and then locally clamped and fixed to the forming die by tooling for cold drawing with a small curvature. During the small curvature cold drawing process, the tensile force is controlled between 12-20 MPa and kept constant. The material is unloaded when the local small curvature radius of the rough material A after large curvature cold drawing is consistent with the mold.