CN111451423A - Manufacturing process method of titanium alloy ultrahigh-pressure-resistant spherical shell blank - Google Patents
Manufacturing process method of titanium alloy ultrahigh-pressure-resistant spherical shell blank Download PDFInfo
- Publication number
- CN111451423A CN111451423A CN202010197016.1A CN202010197016A CN111451423A CN 111451423 A CN111451423 A CN 111451423A CN 202010197016 A CN202010197016 A CN 202010197016A CN 111451423 A CN111451423 A CN 111451423A
- Authority
- CN
- China
- Prior art keywords
- blank
- spherical shell
- die
- forging
- titanium alloy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 59
- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 49
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 45
- 238000005242 forging Methods 0.000 claims abstract description 61
- 238000010438 heat treatment Methods 0.000 claims abstract description 55
- 238000003754 machining Methods 0.000 claims abstract description 6
- 230000007704 transition Effects 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 239000011521 glass Substances 0.000 claims description 6
- 238000007689 inspection Methods 0.000 claims description 6
- 239000000314 lubricant Substances 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 238000004040 coloring Methods 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 5
- 238000003303 reheating Methods 0.000 description 9
- 230000009466 transformation Effects 0.000 description 9
- 238000011282 treatment Methods 0.000 description 9
- 229910045601 alloy Inorganic materials 0.000 description 8
- 239000000956 alloy Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 7
- 238000007493 shaping process Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910000713 I alloy Inorganic materials 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910000883 Ti6Al4V Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J3/00—Lubricating during forging or pressing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
- B21J5/025—Closed die forging
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Forging (AREA)
Abstract
A manufacturing process method of a titanium alloy ultrahigh pressure-resistant spherical shell blank specifically comprises the following steps; step 1, preparing a die: step 2, preparing a blank: step 3, heating: step 4, die forging: step 5, heat treatment: and (4) carrying out triple heat treatment on the forged piece obtained in the step (4), wherein the temperature of the first heat treatment is 20-80 ℃ below the phase transition point, the temperature of the second heat treatment is 500-850 ℃, and the temperature of the third heat treatment is 500-650 ℃ before final finish machining of the pressure-resistant spherical shell. Compared with the conventional die forging process, the process for forming the product by die forging basically omits the manufacture of the upper die, simplifies the manufacture of the lower die, reduces the processing time of the die by 2 weeks and improves the production efficiency by 50 percent; the cost of the die is reduced, the tonnage of forging equipment is reduced, the cost can be reduced by more than 40%, and the manufactured spherical shell blank has high comprehensive performance.
Description
Technical Field
The invention belongs to the field of metal material hot working process manufacturing methods, and particularly relates to a manufacturing method of a titanium alloy ultrahigh pressure-resistant spherical shell blank.
Background
The ocean covers 71 percent of the earth surface, surveys ocean resources, surveys submarine minerals, rescues lost submarine sailors, salvages submarine valuable instruments and equipment, carries out underwater equipment construction, inspection and maintenance and the like, which are important contents for ocean development in advanced countries in the world, and the deep submergence device is a powerful tool for deep sea research. Compared with other materials, the titanium alloy has the advantages of high specific strength, good high and low temperature performance, seawater corrosion resistance and the like, so the titanium alloy is always the preferred material for manufacturing the marine deep submergence vehicles. The titanium alloy pressure-resistant spherical shell is the most critical component on the deep submersible vehicle, and the submergence depth, the submergence range and the service life of the deep submersible vehicle are directly determined by the comprehensive performance (the comprehensive performance determines the weight).
The titanium alloy ultrahigh pressure-resistant spherical shell for the deep submersible has the general comprehensive performance indexes that:
1) tensile Strength R at Room temperaturep0.2、Rm；
2) Room temperature compressive strength Rpc0.2、Rmc；
3) Room temperature plasticity A, Z;
4) hardness;
5) impact toughness KV2/KU2；
6) Plane strain fracture toughness KIC；
7) Stress corrosion cracking susceptibility test KISCC；
8) Fatigue crack propagation rate da/dN;
9) high, low ploidy tissue, etc.
The patent entitled "a simple seal head forming process for titanium alloy gas cylinder" by the seventh second fifth research institute of the company of the ship re-engineering group of china (patent number: Z L200910227725.3) proposes a seal head forming process, which can also be used for manufacturing a common titanium alloy pressure-resistant spherical shell, i.e. a plate (plate blank) is adopted for punch forming, but the blank manufactured by the method has the following insurmountable defects in the aspect of the comprehensive performance of the titanium alloy:
1) the plate (plate blank) is used as a raw material for forming, so that the longitudinal and transverse performance difference of the plate (plate blank) cannot be overcome, and the imbalance of the performance of the pressure-resistant spherical shell body in each direction is caused.
2) The pressure-resistant spherical shell blank formed by the plate (plate blank) has larger defects such as internal linear cracks, cavities and the like (compared with a forging blank) detected by nondestructive testing.
3) The deformation of the pressure-resistant spherical shell blank formed by the stamping process is small (compared with a forging blank), and the comprehensive performance of the pressure-resistant spherical shell cannot be effectively improved.
4) Part of performance indexes can meet the index requirements, but part of performance can not meet the index requirements, and the comprehensive performance is poor.
In general pressure-resistant spherical shells, the defects of plate (slab) stamping forming have little influence on the use of the pressure-resistant spherical shells, but in the case of ultrahigh pressure-resistant spherical shells, the method cannot be sufficient, so that a new process method is urgently needed to manufacture titanium alloy ultrahigh pressure-resistant spherical shell blanks.
The performance of the pressure-resistant spherical shell is closely related to the corresponding heat treatment process besides the forming process.
A paper of Maringer and the like of the titanium alloy research department of the institute of metals of Chinese academy of sciences, namely the influence of multiple heat treatments on the structure and mechanical properties of TC4 alloy (the paper of materials research, 10 months 2008) adopts a phi 85mm bar to carry out 6 groups of multiple heat treatment tests at the temperature above a phase transition point, and only 5 properties including strength, plasticity, plane strain fracture toughness, fatigue crack propagation rate and structure are analyzed in the paper, and the result shows that the alloy structure obtained by the heat treatment process of the paper is a Widmanschner structure with coarse grains, and the alloy has good other properties but poor shaping (A: 8.8-13%, Z: 11-23%).
The influence of heat treatment on the structural performance of TC4-DT titanium alloy is carried out in a paper of Yanghaiying, etc. (Material development and application, 2009, 4 months) of northwest non-ferrous metal institute, 3 groups of double heat treatment tests are carried out on a phi 300mm bar at the temperature below a transformation point, and the paper only analyzes the strength, the plasticity, the plane strain fracture toughness, the fatigue crack propagation rate and 5 properties of the structure, and the result shows that the alloy structure obtained by the heat treatment process is a two-state structure, and the alloy has poor shaping (A: 8-11%, Z: 27-43%) although other properties are good.
The results of 6 groups of double or multiple heat treatment tests on the structure and performance of a Ti-6Al-4V E L I alloy thick plate by adopting a plate with the specification of 30 × 300 × 250mm in a treatise of Lihui and the like of northwest university of industry (rare metals, 12 months 2005), and only 4 properties of strength, plasticity, plane strain fracture toughness and structure are analyzed, show that the alloy structure obtained by the heat treatment process of the treatise is a Widmanschner structure or a two-state structure with coarse grains, the alloy shaping is good (A: 11.5-16.5% and Z: 27.5-50%), but the two properties of strength and plane strain fracture toughness cannot be good simultaneously, if the strength is high, the plane strain fracture toughness is low (76.71), and if the plane strain fracture toughness is high, the strength is low (R: 11.5-16.5-50%)m=915MPa，Rp0.2=835MPa，）。
The above data show that the heat treatment process of the existing data cannot obtain the comprehensive performance required by the ultrahigh pressure resistant spherical shell, and in addition, the specification of raw materials for data test is relatively small, and the heat treatment process is not suitable for manufacturing the ultrahigh pressure resistant spherical shell with a large size, so that a new heat treatment process is also urgently needed to be matched with the forging forming process to achieve the manufacturing requirement of the titanium alloy ultrahigh pressure resistant spherical shell blank.
Disclosure of Invention
In order to solve the technical problem, the invention provides a manufacturing process method of a titanium alloy ultrahigh pressure-resistant spherical shell blank, which is used for manufacturing a spherical shell blank with high comprehensive performance and large specification.
In order to realize the technical purpose, the adopted technical scheme is as follows: a manufacturing process method of a titanium alloy ultrahigh pressure resistant spherical shell blank is used for manufacturing the titanium alloy ultrahigh pressure resistant spherical shell blank by utilizing a spherical shell die and a forming process, and specifically comprises the following steps;
step 5, heat treatment: and (4) carrying out triple heat treatment on the forged piece obtained in the step (4), wherein the temperature of the first heat treatment is 20-80 ℃ below the phase transition point, the temperature of the second heat treatment is 500-850 ℃, and the temperature of the third heat treatment is 500-650 ℃ before final finish machining of the pressure-resistant spherical shell.
The inspection mode of the surface cracks of the blank is peeling, visible light and coloring inspection.
When the heating temperature is 20-80 ℃ below the transformation point, the heat preservation time is calculated according to 0.8-1.2 min/mm along the thickness direction.
And a laser thermodetector is adopted to measure the temperature of the surface of the blank in the die forging process so as to ensure that the temperature of the blank is always kept within the range of the hot forming temperature of the titanium alloy during forming.
The invention has the beneficial effects that the ultrahigh pressure resistant spherical shell manufactured by the manufacturing process of the titanium alloy ultrahigh pressure resistant spherical shell blank meets the requirements of various technical indexes at lower manufacturing cost, and practice shows that the process is very successful, not only meets the requirements of various performance indexes of the product, but also greatly improves the performance indexes of the product, through carrying out nondestructive detection on the spherical shell blank, no obvious defect exists in the blank, the metallographic structure of the titanium alloy obtained after heat treatment is that an equiaxial nascent α phase + β transformation structure, a β transformation structure consists of lamellar secondary α phase and residual β phase which are distributed in a basket-shaped staggered manner, and the ultrahigh pressure resistant spherical shell blank manufactured by adopting α + β type titanium alloy has the performance shown in table 1:
TABLE 1 titanium alloy ultra-high pressure resistant spherical shell Performance Table
As can be seen from Table 1, higher impact toughness and plane strain fracture toughness K are obtained under the condition of ensuring high strength and shaping of the pressure-resistant spherical shellICStress corrosion cracking susceptibility test KISCCAnd the like, so that excellent combination of comprehensive properties is achieved.
Compared with the conventional die forging process, the process for forming the product by die forging basically omits the manufacture of the upper die, simplifies the manufacture of the lower die, reduces the processing time of the die by 2 weeks and improves the production efficiency by 50 percent; the cost of the die is reduced, the tonnage of forging equipment is reduced, and the cost can be reduced by more than 40%.
Drawings
FIG. 1 is a schematic view of a spherical shell blank of the present invention;
FIG. 2 is a schematic structural diagram of a spherical shell lower die and a steel hemisphere upper die of the invention;
FIG. 3 is a schematic view of the forming process of the present invention;
FIG. 4 is a high and low power structure diagram of the titanium alloy ultra-high pressure resistant spherical shell of example 1 after heat treatment;
in the figure: 1. the device comprises a spherical shell lower die, a spherical shell upper die, a spherical shell lower die, a spherical shell upper.
Detailed Description
The invention relates to equipment required in the production process of a titanium alloy ultrahigh pressure-resistant spherical shell blank, which comprises the following steps: a box-type resistance furnace, an oil pressure forming machine and a laser temperature measuring instrument.
The blank schematic diagram of the titanium alloy ultrahigh pressure resistant spherical shell is shown in the attached figure 1.
The invention is suitable for manufacturing titanium alloy ultrahigh pressure resistant spherical shell blanks with the specification of phi 200-phi 600 mm.
The manufacturing method of the titanium alloy ultrahigh pressure-resistant spherical shell blank comprises the following steps:
1) mold design and fabrication
The die of the invention is designed by adopting 1 spherical shell lower die and 1 common steel hemispherical upper die (non-titanium alloy special die steel) for die forging. Compared with an upper die made of special die steel for titanium alloy, 1 common steel hemisphere is used as the upper die, so that the manufacturing cost of the die can be obviously reduced. In addition, the design of the spherical shell lower die adopts a penetrating type die ring, so that the manufacturing cost of the die can be greatly reduced. During forging, the lower spherical shell die can move on the equipment platform, and a partial free forging function can be adopted, so that the tonnage of forging equipment is greatly reduced, and the purpose of reducing the cost again is achieved.
The schematic diagram of the titanium alloy ultrahigh-pressure-resistant spherical shell blank forging die is shown in the attached figure 2.
2) Preparation of the blank before forging
a. The blank is firstly processed by peeling and visible light and is subjected to coloring inspection so as to prevent cracks on the surface of the blank from being brought into the spherical shell blank.
b. And chamfering the two ends of the blank to prevent the quality of the spherical shell blank from being influenced by too fast cooling of the corner of the blank.
c. The special glass lubricant is coated on the surface of the blank before heating, so that the frictional resistance between the blank and a die is reduced, the oxidation of the blank is reduced, and the temperature drop of the blank in the contact process with the die during forging is reduced.
3) Heating of
The electric furnace is adopted for heating, so that the damage of harmful atmosphere to the performance of the titanium alloy is prevented. Stainless steel plates are required to be arranged in the furnace for placing blanks, so that the pollution of furnace slag and the like in the furnace to the surface of the titanium alloy is avoided. The heating temperature is 20-80 ℃ below the transformation point, and the heat preservation time is calculated according to 0.8-1.2 min/mm along the thickness direction.
4) Die forging
The mold is preheated to 200-300 ℃ before forming, so that the phenomenon that the temperature difference between the mold and the blank is too large, and the blank is locally chilled is avoided.
When in die forging, the blank is basically forged into the lower die cavity of the spherical shell to fill most of the lower die cavity of the spherical shell; and then moving the spherical shell lower die, forging the lower die part in a free forging mode, and placing the hemispherical upper die for final forging under the condition of basically meeting the requirement of filling the lower die until the lower die is completely filled.
And a laser thermodetector is adopted to measure the temperature of the surface of the blank in the die forging process so as to ensure that the temperature of the blank is always kept within the range of the hot forming temperature of the titanium alloy during forming.
The schematic drawing of the die forging forming process of the titanium alloy ultrahigh pressure resistant spherical shell blank is shown in the attached figure 3.
5) Thermal treatment
According to the requirements of various properties of a blank forging, combined with various process parameters in the die forging process and subsequent machining stress elimination requirements, a triple heat treatment process is worked out, wherein the first heat treatment temperature is 20-80 ℃ below the phase transition point, the second heat treatment temperature is 500-850 ℃, and the third heat treatment is carried out before final finish machining of the pressure-resistant spherical shell, and the temperature is 500-650 ℃.
The α + β type titanium alloy high-power metallographic structure obtained by the heat treatment process is an equiaxial primary α phase + β transformation structure, the β transformation structure consists of a reticular basket-shaped staggered lamellar secondary α phase and a residual β phase, and as shown in figure 4, the structure ensures that the titanium alloy has higher strength, shaping and other properties, particularly the reticular basket-shaped staggered lamellar secondary α phase can gradually increase the fracture crack propagation path to gradually increase the energy required by crack propagation, and finally shows that the impact toughness, fracture toughness and other properties of the alloy are improved.
Example 1:
the invention has been applied to the manufacture of TC 4E L I titanium alloy ultra-high pressure resistant spherical shell with phi 360 specification.
1) The outer diameter of the forging piece with the specification is 360mm, the outer diameter of the maximum flange is 450mm, and the thickness of a finish machining spherical shell is 20 mm.
2) And after blanking, the blank is subjected to laser irradiation and chamfering, and then the surface of the blank is coated with a Ti-5 glass lubricant.
3) Heating in an electric furnace, placing stainless steel in the furnace, heating to 950 +/-10 ℃, and keeping the temperature for 1min/mm when the temperature is reached.
4) Preheating the die to 280 +/-20 ℃, and coating a graphite water solution on the surface of the lower die for proper lubrication in the die forging process.
5) And (3) measuring the temperature of the surface by using a laser thermometer to ensure that the forming temperature is kept above 750 ℃.
6) The heat treatment process comprises the following steps: the 1 st reheating treatment temperature is 930 ℃ plus or minus 10 ℃, the 2 nd reheating treatment temperature is 760 ℃ plus or minus 10 ℃, and the 3 rd reheating treatment temperature is 560 ℃ plus or minus 10 ℃.
The performance of the ultrahigh-pressure-resistant spherical shell blank forging body manufactured by the method is shown in Table 2, the overall performance is far better than the requirements of national standard (GB/T25137-p0.2The pressure is higher than the national standard requirement by 126MPa, and finally the spherical shell successfully passes the check test of 140MPa ultrahigh pressure.
TABLE 2 TC 4E L I titanium alloy pressure-proof spherical shell blank properties
The metallurgical structure of the TC 4E L I alloy obtained after the heat treatment is an equiaxial primary α phase + β transformation structure, and the β transformation structure consists of flaky (basket-shaped) secondary α phases and residual β phases which are distributed in a staggered mode, as shown in the attached figure 4.
Compared with the conventional die forging process, the process for forming the product by die forging basically omits the manufacture of the upper die, simplifies the manufacture of the lower die, reduces the processing time of the die by 2 weeks and improves the production efficiency by 50 percent; the cost of the die is reduced, the tonnage of forging equipment is reduced, and the cost can be reduced by more than 45%. Meanwhile, the comprehensive performance obtained is higher than that obtained by conventional die forging.
Example 2:
the invention has been applied to the manufacture of TC4 titanium alloy ultra-high pressure resistant spherical shell with the specification of phi 560.
1) The outer diameter of the forging with the specification is 560mm, and the inner diameter is 400 mm.
2) And after blanking, the blank is subjected to laser irradiation and chamfering, and then the surface of the blank is coated with a Ti-6 glass lubricant.
3) Heating in an electric furnace, placing stainless steel in the furnace, heating to 960 + -10 deg.C, and holding for 1 min/mm.
4) Preheating the die to 280 +/-20 ℃, and coating a graphite water solution on the surface of the lower die for proper lubrication in the die forging process.
5) And (3) measuring the temperature of the surface by using a laser thermometer to ensure that the forming temperature is kept above 750 ℃.
6) The heat treatment process comprises the following steps: the 1 st reheating treatment temperature is 950 ℃ plus or minus 10 ℃, the 2 nd reheating treatment temperature is 760 ℃ plus or minus 10 ℃, and the 3 rd reheating treatment temperature is 560 ℃ plus or minus 10 ℃.
The performance of the ultrahigh-pressure-resistant spherical shell blank forging body manufactured by the method is shown in Table 3, and the overall performance is far superior to the requirements of national standards (GB/T16598-2013).
TABLE 3 TC4 titanium alloy pressure-resistant spherical shell blank properties
Compared with the conventional die forging process, the process for forming the product by die forging basically omits the manufacture of the upper die, simplifies the manufacture of the lower die, reduces the processing time of the die by 2 weeks and improves the production efficiency by 50 percent; the cost of the die is reduced, the tonnage of forging equipment is reduced, and the cost can be reduced by more than 45%. Meanwhile, the comprehensive performance obtained is higher than that obtained by conventional die forging.
Example 3:
the invention has been applied to the manufacture of TA31 titanium alloy ultra-high pressure resistant spherical shell with the specification of phi 300.
1) The outer diameter phi of the spherical shell forging piece with the specification is 300mm, and the inner diameter phi of the spherical shell forging piece with the specification is 190 mm.
2) And after blanking, the blank is subjected to laser irradiation and chamfering, and then the surface of the blank is coated with a Ti-1 glass lubricant.
3) Heating with an electric furnace, placing stainless steel in the furnace, heating to 970 +/-10 ℃, and keeping the temperature for 1min/mm when the temperature is reached.
4) Preheating the die to 280 +/-20 ℃, and coating a graphite water solution on the surface of the lower die for proper lubrication in the die forging process.
5) And (3) measuring the temperature of the surface by using a laser thermometer to ensure that the forming temperature is kept above 750 ℃.
6) The heat treatment process comprises the following steps: the 1 st reheating treatment temperature is 960 ℃ +/-10 ℃, the 2 nd reheating treatment temperature is 650 +/-10 ℃, and the 3 rd reheating treatment temperature is 560 ℃ +/-10 ℃.
The performance of the ultrahigh pressure resistant spherical shell blank forging body manufactured by the method is shown in Table 4, and the overall performance is far superior to the requirements of national standard (GB/T35364-2017).
TABLE 4 TA31 titanium alloy pressure-resistant spherical shell blank properties
Compared with the conventional die forging process, the process for forming the product by die forging basically omits the manufacture of the upper die, simplifies the manufacture of the lower die, reduces the processing time of the die by 2 weeks and improves the production efficiency by 50 percent; the cost of the die is reduced, the tonnage of forging equipment is reduced, and the cost can be reduced by more than 45%.
Claims (4)
1. A manufacturing process method of a titanium alloy ultrahigh pressure-resistant spherical shell blank is characterized by comprising the following steps: the manufacturing of the titanium alloy ultrahigh pressure resistant spherical shell blank is completed by utilizing a spherical shell mold and a forming process, and the method specifically comprises the following steps;
step 1, preparing a die: a spherical shell lower die is matched with a steel hemisphere upper die for die forging;
step 2, preparing a blank: inspecting and removing the blank with cracks on the surface, chamfering the qualified blank and coating a glass lubricant on the surface;
step 3, heating: an electric furnace is adopted for heating, a stainless steel plate is padded in the electric furnace, and then a blank is placed and heated;
step 4, die forging: preheating a mold to 200-300 ℃ before forming, and forging a blank into a lower mold cavity of the spherical shell to fill most of the lower mold cavity when forging; then forging the blank by moving the spherical shell lower die, and placing the steel hemisphere upper die for final forging until the blank is completely filled under the condition that the filling of the spherical shell lower die is basically met;
step 5, heat treatment: and (4) carrying out triple heat treatment on the forged piece obtained in the step (4), wherein the temperature of the first heat treatment is 20-80 ℃ below the phase transition point, the temperature of the second heat treatment is 500-850 ℃, and the temperature of the third heat treatment is 500-650 ℃ before final finish machining of the pressure-resistant spherical shell.
2. The manufacturing process method of the titanium alloy ultrahigh pressure-resistant spherical shell blank as claimed in claim 1, characterized in that: the inspection mode of the surface cracks of the blank is peeling, visible light and coloring inspection.
3. The manufacturing process method of the titanium alloy ultrahigh pressure-resistant spherical shell blank as claimed in claim 1, characterized in that: the heating temperature in the step 3 is 20-80 ℃ below the phase transition point, and the heat preservation time is calculated according to 0.8-1.2 min/mm along the thickness direction.
4. The manufacturing process method of the titanium alloy ultrahigh pressure-resistant spherical shell blank as claimed in claim 1, characterized in that: and a laser thermodetector is adopted to measure the temperature of the surface of the blank in the die forging process so as to ensure that the temperature of the blank is always kept within the range of the hot forming temperature of the titanium alloy during forming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010197016.1A CN111451423B (en) | 2020-03-19 | 2020-03-19 | Manufacturing process method of titanium alloy ultrahigh-pressure-resistant spherical shell blank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010197016.1A CN111451423B (en) | 2020-03-19 | 2020-03-19 | Manufacturing process method of titanium alloy ultrahigh-pressure-resistant spherical shell blank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111451423A true CN111451423A (en) | 2020-07-28 |
| CN111451423B CN111451423B (en) | 2022-04-19 |
Family
ID=71672979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010197016.1A Active CN111451423B (en) | 2020-03-19 | 2020-03-19 | Manufacturing process method of titanium alloy ultrahigh-pressure-resistant spherical shell blank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111451423B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114535479A (en) * | 2022-03-01 | 2022-05-27 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Forging method of large arc die forging |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06285574A (en) * | 1993-03-31 | 1994-10-11 | Sumitomo Metal Ind Ltd | Manufacture of semispherical titanium alloy forged product |
| CN101693279A (en) * | 2009-10-20 | 2010-04-14 | 西安西工大超晶科技发展有限责任公司 | Upsetting and extruding precision die-forging forming method for large titanium alloy deep tube parts |
| CN101745784A (en) * | 2009-12-21 | 2010-06-23 | 中国船舶重工集团公司第七二五研究所 | Simple forming process of seal head for titanium alloy cylinder |
| CN102758159A (en) * | 2012-08-02 | 2012-10-31 | 西北工业大学 | Method for acquiring titanium alloy tristate structure by forging and heat treatment |
| CN102963100A (en) * | 2012-11-16 | 2013-03-13 | 中国船舶重工集团公司第七二五研究所 | Manufacturing method for titanium and titanium alloy products by coating and forming |
| CN103252434A (en) * | 2013-04-24 | 2013-08-21 | 安徽铖友汽车零部件制造有限公司 | Forging technology of bell housing |
| CN104923603A (en) * | 2015-06-23 | 2015-09-23 | 宝鸡钛业股份有限公司 | Technology for preparing pressure resisting titanium alloy half ball for bathyscaph manned ball |
| CN108057758A (en) * | 2017-12-08 | 2018-05-22 | 航天材料及工艺研究所 | A kind of superplasticity isothermal stamping process of TA7 titanium alloys thick spherical shell |
| CN207723402U (en) * | 2017-12-13 | 2018-08-14 | 陕西宏远航空锻造有限责任公司 | A kind of forging mold of large titanium alloy casing class forging part |
| CN110273118A (en) * | 2019-06-14 | 2019-09-24 | 中国航发北京航空材料研究院 | A kind of heat treatment process of titanium alloy |
-
2020
- 2020-03-19 CN CN202010197016.1A patent/CN111451423B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06285574A (en) * | 1993-03-31 | 1994-10-11 | Sumitomo Metal Ind Ltd | Manufacture of semispherical titanium alloy forged product |
| CN101693279A (en) * | 2009-10-20 | 2010-04-14 | 西安西工大超晶科技发展有限责任公司 | Upsetting and extruding precision die-forging forming method for large titanium alloy deep tube parts |
| CN101745784A (en) * | 2009-12-21 | 2010-06-23 | 中国船舶重工集团公司第七二五研究所 | Simple forming process of seal head for titanium alloy cylinder |
| CN102758159A (en) * | 2012-08-02 | 2012-10-31 | 西北工业大学 | Method for acquiring titanium alloy tristate structure by forging and heat treatment |
| CN102963100A (en) * | 2012-11-16 | 2013-03-13 | 中国船舶重工集团公司第七二五研究所 | Manufacturing method for titanium and titanium alloy products by coating and forming |
| CN103252434A (en) * | 2013-04-24 | 2013-08-21 | 安徽铖友汽车零部件制造有限公司 | Forging technology of bell housing |
| CN104923603A (en) * | 2015-06-23 | 2015-09-23 | 宝鸡钛业股份有限公司 | Technology for preparing pressure resisting titanium alloy half ball for bathyscaph manned ball |
| CN108057758A (en) * | 2017-12-08 | 2018-05-22 | 航天材料及工艺研究所 | A kind of superplasticity isothermal stamping process of TA7 titanium alloys thick spherical shell |
| CN207723402U (en) * | 2017-12-13 | 2018-08-14 | 陕西宏远航空锻造有限责任公司 | A kind of forging mold of large titanium alloy casing class forging part |
| CN110273118A (en) * | 2019-06-14 | 2019-09-24 | 中国航发北京航空材料研究院 | A kind of heat treatment process of titanium alloy |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114535479A (en) * | 2022-03-01 | 2022-05-27 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Forging method of large arc die forging |
| CN114535479B (en) * | 2022-03-01 | 2023-11-28 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Forging method of large arc die forging |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111451423B (en) | 2022-04-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103028912B (en) | Steel forging manufacturing method for valve seat of deep-sea oil production equipment | |
| CN108517461B (en) | High-performance martensitic stainless steel flange and manufacturing method thereof | |
| CN107866665B (en) | Million MW class nuclear power unit high intensity retaining ring manufacturing process | |
| Shi et al. | Effect of shot peening and vibration finishing on the fatigue behavior of TC17 titanium alloy at room and high temperature | |
| CN111940538B (en) | Cold rolling method for TC27 titanium alloy pipe | |
| CN106734465B (en) | Method based on the hot press-formed production automobile B-column of multilayer common metal composite plate | |
| CN111451423B (en) | Manufacturing process method of titanium alloy ultrahigh-pressure-resistant spherical shell blank | |
| CN109504877A (en) | A kind of TA23 sheet alloy and the preparation and application of high impact toughness and high-ductility | |
| CN112359300B (en) | Method for reducing quenching residual stress of die forging | |
| CN112317551A (en) | Method for forming L80-13 Cr martensitic stainless steel seamless steel tube | |
| CN110564924A (en) | Quenching and tempering and integral quenching process method for 40CrMnMo steel | |
| CN111926284B (en) | Steam turbine high-medium pressure inner cylinder steam oxidation resistant coating and preparation method thereof | |
| Kim et al. | Integrated hot forming and heat treatment process on Al6061 tailor rolled blank | |
| CN108580577A (en) | A kind of preparation method of the high-strength beta-titanium alloy silk material of spring | |
| CN104498692A (en) | Cold-drawn steel pipe mandrel and preparation method thereof | |
| CN107649834B (en) | A kind of manufacturing process of carbon steel forged shaft peculiar to vessel | |
| CN112958678B (en) | Processing technology of deep-sea pressure-resistant titanium alloy hemispherical cabin | |
| CN215916421U (en) | Golf club made of titanium alloy | |
| CN104353698A (en) | Production technology of high pressure fuel pipe | |
| CN212504990U (en) | Processing device for realizing surface nanocrystallization of crankshaft device | |
| CN112371886B (en) | Forging method of large-size titanium alloy bar blank for gas cylinder | |
| CN111069491B (en) | Hot forming method for improving structural uniformity of GH4586 alloy disc-shaped piece | |
| CN102357646A (en) | Method for forging nuclear-grade swing check valve body with high Cv value | |
| CN112496216A (en) | Forging production process of 30Cr15MoN high-nitrogen martensitic stainless steel bar | |
| CN112195318A (en) | Heat treatment process for high-yield, low-temperature and high-toughness seat frame steel casting for deep-sea ship |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240108 Address after: No. 169, Binhe South Road, Luolong District, Luoyang City, Henan Province Patentee after: Luoyang Shipbuilding Materials Research Institute (725th Research Institute of China Shipbuilding Corp.) Address before: No.32 Binhe North Road, high tech Zone, Luoyang City, Henan Province Patentee before: CHINA SHIPBUILDING INDUSTRY CORPORATION NO.725 Research Institute |