CN102489952A - Method for manufacturing titanium alloy thick-wall pressure-resistant cylinder body - Google Patents
Method for manufacturing titanium alloy thick-wall pressure-resistant cylinder body Download PDFInfo
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Abstract
本发明公开了一种钛合金厚壁耐压筒体的制造方法，该方法为：一、将原料铸锭开坯锻造成棒坯；二、将棒坯反复镦粗、拔长锻造得到棒材；三、对棒材进行退火处理或固溶处理，消除棒材残余应力；四、将棒材在深孔钻镗床设备上进行内排屑深孔钻镗，加工出与棒材同长度的筒体毛坯；五、对筒体毛坯进行内表面精镗和外表面精车处理，得到壁厚不小于15mm的厚壁筒体；或者对筒体毛坯进行内表面精镗和外表面精车处理后进行时效处理，得到壁厚不小于15mm的厚壁筒体。本发明制造的厚壁筒体为整体制造，无需焊接，提高了筒体抗应力腐蚀性能，采用该筒体制造的部件，能承受0～5MPa的设计压力的疲劳性能要求，筒体安全性和可靠性高。The invention discloses a method for manufacturing a titanium alloy thick-walled pressure-resistant cylinder. The method comprises the following steps: 1. opening and forging a raw material ingot into a billet; 2. repeatedly upsetting and elongating the billet to obtain a rod ; 3. Carry out annealing treatment or solid solution treatment on the bar to eliminate the residual stress of the bar; 4. Carry out internal chip removal deep hole drilling and boring on the bar on the deep hole drilling and boring machine equipment, and process a tube with the same length as the bar Body blank; 5. Carry out inner surface fine boring and outer surface finish turning treatment on the cylinder blank to obtain a thick-walled cylinder with a wall thickness not less than 15mm; or after performing inner surface fine boring and outer surface finish turning on the cylinder blank Aging treatment is carried out to obtain a thick-walled cylinder with a wall thickness not less than 15 mm. The thick-walled cylinder produced by the present invention is integrally manufactured without welding, which improves the stress corrosion resistance of the cylinder, and the parts made of the cylinder can withstand the fatigue performance requirements of the design pressure of 0-5MPa, and the safety and performance of the cylinder can be improved. High reliability.
Description
Technical field
The invention belongs to the titanium alloy material processing technique field, be specifically related to a kind of manufacturing approach of titanium alloy heavy wall overpressure resistant barrel.
Background technology
The processing method of general thin-wall barrel is that sheet material is rolled into a cylinder on veneer reeling machine, and bevel, groove assembly welding are then annealed, flaw detection, machined process big specification thin-wall barrel then.Thick-wall cylinder be with two semicircular cylinders of plate moulding moulding, then, import bevel processing, groove butt welding are detected a flaw, annealing, machined processes big specification thick-wall cylinder at last.There are two longitudinal seams in the manufacturing thick-wall cylinder, and there is a longitudinal seam in thin-wall barrel, in the welding process weld seam be easy to generate be mingled with, metallurgical imperfection such as cavity; The cylindrical shell wall thickness is thick more; The welding passage is just many more, and plasticity reduces big more, and the probability that metallurgical imperfection produces is big more.The thin-wall part welding is easily because of welding overheated generation distortion.Welding point weld seam and heat affected area are cast sturcture, organize crystal grain thick.Weld seam is compared with mother metal, and anti-stress corrosion performance reduces greatly, unavoidably brings potential safety hazard.
Application number is that 200710054017.5 patent has been introduced circle preparation seamless thin wall overpressure resistant barrel in a kind of forging bar, processing wire hole and the electric spark cutting, and this method only is suitable for processing length less than the 500mm cylindrical shell owing to receive the restriction of wire hole.
The steel thick wall cylindrical shell can adopt the processing of fullering with the core bar method, promptly forges excellent base earlier, bores a hole then, again with mandrel perforation carrying out attenuate, the pulling of cylindrical shell.The steel thermal conductivity is good, and hot melt is big, and yield strength is low, and elevated temperature strength is to temperature-insensitive, and surface temperature reduces slowly, and process window broad, drum surface are not prone to crackle, and it is little to be fit to fullering with the core bar forging diameter, the cylindrical shell that radius-thickness ratio is big, length is long.
Also useful abroad extruder extruding beta titanium alloy heavy wall Φ 460mm * 114mm * 2380mm cylindrical shell, but the tonnage of extruder is very huge, and processing charges is expensive.The high-performance cylindrical shell practical for privileged sites can adopt this method, but for the cylindrical shell that uses under the conventional environment, cost is higher.
For seamless shell, can also adopt the casting pipe, on spinning machine, carry out rotary pressing processing then.Titanium alloy only adopts acetylene heating pipe because thermal conductivity factor is poor, and hot melt is little, and temperature rise is difficulty, and temperature homogeneity is difficult to guarantee, adopts resistance furnace heating pipe at present, and then guarantees that with the acetylene heating bigger temperature drop does not take place spinning position pipe.Pipe is thin, and the acetylene heat energy that pipe absorbs is enough to the uniformity of holding temperature, and pipe is thick, and the acetylene heating is difficult to guarantee pipe temperature maintenance and uniformity, and titanium alloy surface temperature drop, spinning are easy to generate defectives such as crackle, peeling.Therefore, cast pipe+spinning United Technologies, be only applicable to the processing of the titanium alloy barrel body of thin-walled.
The thick-wall titanium alloy cylindrical shell also can directly adopt casting method processing; There are a large amount of pores in the cast titanium foundry goods; Foundry goods is not cold, high temperature insostatic pressing (HIP) although carry out cylindrical shell the casting back; But still having the residual pore of part in thick-wall cylinder inside, cast properties is lower than the intensity and the plasticity of forging, plate property, influences the performance and the service life of cylindrical shell.
Summary of the invention
Technical problem to be solved by this invention is the deficiency to above-mentioned prior art, a kind of whole manufacturing is provided, the manufacturing approach of the titanium alloy heavy wall overpressure resistant barrel that need not to weld.This method has been avoided the thick cast sturcture of welding point weld seam and heat affected area, has improved the cylindrical shell anti-stress corrosion performance.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of manufacturing approach of titanium alloy heavy wall overpressure resistant barrel is characterized in that this method may further comprise the steps:
Step 1, the nearly alpha titanium alloy ingot casting of employing, alpha and beta type titan alloy ingot casting or nearly beta titanium alloy ingot casting are raw material; Using fast forging machine is under 1050 ℃～1180 ℃ the condition raw material ingot casting to be forged 2～3 fire in the cogging of β phase region at initial forging temperature; Every fire time forging ratio is not less than 1.3, obtains nearly alpha titanium alloy rod base, alpha and beta type titan alloy rod base or nearly beta titanium alloy rod base;
Step 2, be that 2～7 fire are forged in jumping-up, pulling repeatedly under 10 ℃～70 ℃ the condition below the excellent base beta transformation point in forging temperature with nearly alpha titanium alloy rod base described in the step 1 or alpha and beta type titan alloy rod base; Every fire time forging ratio is not less than 1.3; Total forging ratio of two-phase section is not less than 10, obtains nearly alpha titanium alloy bar or type alpha+beta titanium alloy rod bar; Is that 2～7 fire are forged in jumping-up, pulling repeatedly under 50 ℃～150 ℃ the condition more than the excellent base beta transformation point with nearly beta titanium alloy rod base described in the step 1 in forging temperature; Every fire time forging ratio is not less than 1.3; Total forging ratio of two-phase section is not less than 10, obtains nearly beta titanium alloy bar;
Step 3, nearly alpha titanium alloy bar or type alpha+beta titanium alloy rod bar described in the step 2 are carried out annealing in process, eliminate the bar residual stress, nearly beta titanium alloy bar described in the step 2 is carried out solution treatment, eliminate the bar residual stress;
Step 4, the nearly alpha titanium alloy bar of eliminating residual stress in the step 3, type alpha+beta titanium alloy rod bar or nearly beta titanium alloy bar are carried out the bta deep hole drilling boring on deep hole drilling and boring machine equipment, process and bar with nearly alpha titanium alloy cylindrical shell blank, alpha and beta type titan alloy cylindrical shell blank or the nearly beta titanium alloy cylindrical shell blank of length;
Step 5, nearly alpha titanium alloy cylindrical shell blank or alpha and beta type titan alloy cylindrical shell blank described in the step 4 are carried out the inner surface right boring and the outer surface finish turning is handled, obtain wall thickness and be not less than the nearly alpha titanium alloy thick-wall cylinder of 15mm or the alpha and beta type titan alloy thick-wall cylinder that wall thickness is not less than 15mm; Perhaps nearly beta titanium alloy cylindrical shell blank described in the step 4 is carried out inner surface right boring and the processing of outer surface finish turning, then the beta titanium alloy cylindrical shell blank after handling is carried out Ageing Treatment, obtain the nearly beta titanium alloy thick-wall cylinder that wall thickness is not less than 15mm.
The manufacturing approach of above-mentioned a kind of titanium alloy heavy wall overpressure resistant barrel in the forging process of cogging described in the step 1, reduces by 20 ℃～130 ℃ of forging temperatures by fire.
The manufacturing approach of above-mentioned a kind of titanium alloy heavy wall overpressure resistant barrel, in the forging process of cogging described in the step 1, the inferior final forging temperature of every fire all is not less than 950 ℃.
The manufacturing approach of above-mentioned a kind of titanium alloy heavy wall overpressure resistant barrel in the forging process, reduces by 0 ℃～60 ℃ of forging temperatures by fire described in the step 2.
The manufacturing approach of above-mentioned a kind of titanium alloy heavy wall overpressure resistant barrel, in the forging process, the inferior final forging temperature of every fire all is not less than 800 ℃ described in the step 2.
The manufacturing approach of above-mentioned a kind of titanium alloy heavy wall overpressure resistant barrel, the system of annealing in process described in the step 3 is: 650 ℃～850 ℃ of annealing temperatures, temperature retention time 0.5h～4h.
The manufacturing approach of above-mentioned a kind of titanium alloy heavy wall overpressure resistant barrel, the system of solution treatment described in the step 3 is: above 10 ℃～50 ℃ of solid solubility temperature beta transformation point, temperature retention time 0.5h～2h.
The manufacturing approach of above-mentioned a kind of titanium alloy heavy wall overpressure resistant barrel, the lathe rotating speed of deep hole drilling and boring machine described in the step 4 is 20r/min～120r/min, the amount of feeding is 0.02mm/r～0.12mm/r.
The manufacturing approach of above-mentioned a kind of titanium alloy heavy wall overpressure resistant barrel, the system of Ageing Treatment described in the step 5 is: 500 ℃～570 ℃ of aging temps, temperature retention time 8h～24h.
The present invention compared with prior art has the following advantages:
1, the present invention is through forging bar and depth drill boring process technology; It is excessive to have solved two semicircular cylinders of heavy wall plate moulding moulding, semicircular cylinder welding preparation method weld width; The commissure organizes crystal grain thick; Be easy to generate be mingled with, metallurgical imperfection such as cavity, reduce the security reliability hidden danger that cylindrical shell uses under pressure environment.
2, thick-wall cylinder of the present invention is whole the manufacturing, need not welding, has avoided the thick cast sturcture of welding point weld seam and heat affected area, has improved the cylindrical shell anti-stress corrosion performance.
3, the parts that adopt heavy wall overpressure resistant barrel of the present invention to make can bear fatigue behaviour requirement, cylindrical shell security and the reliability height of the design pressure of 0～5MPa.
4, draw the complete bar of making in the depth drill process of the present invention, can need this specification forging perhaps forging to be forged into the blank of other shape, can carry out the material comprehensive utilization, improve the utilization rate of material as other.
Through embodiment, technical scheme of the present invention is done further detailed description below.
The specific embodiment
Embodiment 1
Wall thickness is the manufacturing of the nearly alpha titanium alloy heavy wall of the TA24 of 21mm overpressure resistant barrel:
Step 1, the nearly alpha titanium alloy ingot casting of employing TA24 are raw material; With fast forging machine the raw material ingot casting is forged 3 fire in the cogging of β phase region, obtain nearly alpha titanium alloy rod base, wherein: the first fire time initial forging temperature is 1120 ℃; The second fire time initial forging temperature is 1100 ℃; The 3rd fire time initial forging temperature is 1050 ℃, and the inferior final forging temperature of every fire all is not less than 950 ℃, and each fire time forging ratio is followed successively by 1.5,1.4 and 1.3;
Step 2,2 fire are forged in jumping-up, pulling repeatedly with nearly alpha titanium alloy rod base described in the step 1; First fiery forging temperature is following 10 ℃ of excellent base beta transformation point, and the second fire time forging temperature is following 70 ℃ of an excellent base beta transformation point, and the inferior forging ratio of first fire is 4.5; The second fire time forging ratio is 5.6; The inferior final forging temperature of every fire all is not less than 800 ℃, forges last fire and carries out shaping, returns circle, obtains the Φ 440mm * 2000mm bar of better linearity and circularity;
Step 3, be annealing in process 0.5h under 820 ℃ the condition with nearly alpha titanium alloy bar described in the step 2, eliminate the bar residual stress in temperature;
Step 4, the nearly alpha titanium alloy bar of eliminating residual stress in the step 3 is carried out the rough turn processing of outer surface and the end face car is flat, car descales and blemish, reaches the roughness of surface inspection; Carry out nondestructive flaw detection examination; Subsequently bar is placed on the T2150 deep hole drilling and boring machine equipment and carries out the bta deep hole drilling boring, the lathe rotating speed is 45r/min, and the amount of feeding is 0.08mm/r; Draw and make Φ 310mm * 2000mm bar, process and the nearly alpha titanium alloy cylindrical shell blank of bar with length;
Step 5, nearly alpha titanium alloy cylindrical shell blank described in the step 4 is carried out the inner surface right boring and the outer surface finish turning is handled, obtain being of a size of the nearly alpha titanium alloy thick-wall cylinder of TA24 of Φ 426mm * 21mm * 2000mm.
The tensile strength Rm of the nearly alpha titanium alloy thick-wall cylinder of TA24 of present embodiment preparation is 795MPa, and yield strength Rp0.2 is 685MPa, and percentage elongation A is 17%, and contraction percentage of area Z is 49.5%.
Embodiment 2
Wall thickness is the manufacturing of the nearly alpha titanium alloy heavy wall of the TA10 of 15mm overpressure resistant barrel:
Step 1, the nearly alpha titanium alloy ingot casting of employing TA10 are raw material; With fast forging machine the raw material ingot casting is forged 2 fire in the cogging of β phase region; The first fire time initial forging temperature is 1100 ℃; The second fire time initial forging temperature is 1050 ℃, and the inferior final forging temperature of every fire all is not less than 950 ℃, and each fire time forging ratio is followed successively by 1.7 and 1.6;
Step 2,4 fire are forged in jumping-up, pulling repeatedly with alpha titanium alloy described in step 1 rod base; The first fire time forging temperature is following 10 ℃ of an excellent base beta transformation point; Second fiery forging temperature is following 30 ℃ of excellent base beta transformation point, and the 3rd fiery forging temperature is following 50 ℃ of excellent base beta transformation point, and the inferior forging temperature of the 4th fire is following 70 ℃ of an excellent base beta transformation point; Each fire time forging ratio is followed successively by 2.6,2.6,2.8 and 2.6; The inferior final forging temperature of every fire all is not less than 800 ℃, forges last fire and carries out shaping, returns circle, obtains the Φ 400mm * 1800mm bar of better linearity and circularity;
Step 3, be annealing in process 2h under 650 ℃ the condition with nearly alpha titanium alloy bar described in the step 2, eliminate the bar residual stress in temperature;
Step 4, the nearly alpha titanium alloy bar of eliminating residual stress in the step 3 is carried out the rough turn processing of outer surface and the end face car is flat, car descales and blemish, reaches the roughness of surface inspection; Carry out nondestructive flaw detection examination; Subsequently bar is placed on the T2150 deep hole drilling and boring machine equipment and carries out the bta deep hole drilling boring, the lathe rotating speed is 120r/min, and the amount of feeding is 0.12mm/r; Draw and make Φ 290mm * 1800mm bar, process and the nearly alpha titanium alloy cylindrical shell blank of bar with length;
Step 5, nearly alpha titanium alloy cylindrical shell blank described in the step 4 is carried out the inner surface right boring and the outer surface finish turning is handled, obtain being of a size of the nearly alpha titanium alloy thick-wall cylinder of TA10 of Φ 385mm * 15mm * 1800mm.
The tensile strength Rm of the nearly alpha titanium alloy thick-wall cylinder of TA10 of present embodiment preparation is 485MPa, and yield strength Rp0.2 is 345MPa, and percentage elongation A is 18%, and contraction percentage of area Z is 25%.
Embodiment 3
Wall thickness is the manufacturing of the nearly alpha titanium alloy heavy wall of the TA24 of 50mm overpressure resistant barrel:
Step 1, the nearly alpha titanium alloy ingot casting of employing TA24 are raw material; With fast forging machine the raw material ingot casting is forged 2 fire in the cogging of β phase region; The first fire time initial forging temperature is 1120 ℃; The second fire time initial forging temperature is 1050 ℃, and the inferior final forging temperature of every fire all is not less than 950 ℃, and each fire time forging ratio is for being followed successively by 1.8 and 1.9;
Step 2,4 fire are forged in jumping-up, pulling repeatedly with nearly alpha titanium alloy rod base described in the step 1; The first fire time forging temperature is following 10 ℃ of an excellent base beta transformation point; Second fiery forging temperature is following 30 ℃ of excellent base beta transformation point, and the 3rd fiery forging temperature is following 50 ℃ of excellent base beta transformation point, and the inferior forging temperature of the 4th fire is following 70 ℃ of an excellent base beta transformation point; Each fire time forging ratio is followed successively by 2.5,2.8,2.3 and 2.6; The inferior final forging temperature of every fire all is not less than 800 ℃, forges last fire and carries out shaping, returns circle, obtains the Φ 500mm * 2500mm bar of better linearity and circularity;
Step 3, be annealing in process 4h under 850 ℃ the condition with nearly alpha titanium alloy bar described in the step 2, eliminate the bar residual stress in temperature;
Step 4, the nearly alpha titanium alloy bar of eliminating residual stress in the step 3 is carried out the rough turn processing of outer surface and the end face car is flat, car descales and blemish, reaches the roughness of surface inspection; Carry out nondestructive flaw detection examination; Subsequently bar is placed on the T2150 deep hole drilling and boring machine equipment and carries out the bta deep hole drilling boring, the lathe rotating speed is 20r/min, and the amount of feeding is 0.02mm/r; Draw and make Φ 300mm * 2500mm bar, process and the nearly alpha titanium alloy cylindrical shell blank of bar with length;
Step 5, nearly alpha titanium alloy cylindrical shell blank described in the step 4 is carried out the inner surface right boring and the outer surface finish turning is handled, obtain being of a size of the nearly alpha titanium alloy thick-wall cylinder of TA24 of Φ 480mm * 50mm * 2500mm.
The tensile strength Rm of the nearly alpha titanium alloy thick-wall cylinder of TA24 of present embodiment preparation is 785MPa, and yield strength Rp0.2 is 665MPa, and percentage elongation A is 16%, and contraction percentage of area Z is 47.0%.
Embodiment 4
Wall thickness is the manufacturing of the TC4 alpha and beta type titan alloy heavy wall overpressure resistant barrel of 15mm:
Step 1, employing TC4 alpha and beta type titan alloy ingot casting are raw material; Using 1600T to forge machine soon is under 1150 ℃ the condition raw material ingot casting to be forged 2 fire in the cogging of β phase region at initial forging temperature; The first fire time initial forging temperature is 1100 ℃, and the second fire time initial forging temperature is 1050 ℃, and the inferior final forging temperature of every fire all is not less than 950 ℃; Each fire time forging ratio is followed successively by 2.1 and 1.5, obtains alpha and beta type titan alloy rod base;
Step 2,7 fire are forged in jumping-up, pulling repeatedly with alpha and beta type titan alloy described in step 1 rod base; The first and second fire time forging temperatures are following 10 ℃ of excellent base beta transformation point; The third and fourth fire time forging temperature is following 40 ℃ of excellent base beta transformation point; Five, the 6th and the 7th fiery forging temperature is following 60 ℃ of excellent base beta transformation point, and each fire time forging ratio is followed successively by 2.1,1.5,2.2,1.6,2.1,1.5 and 1.3, and the inferior final forging temperature of every fire all is not less than 800 ℃; Forge last fire and carry out shaping, return circle, obtain the Φ 400mm * 2000mm bar of better linearity and circularity;
Step 3, be annealing in process 2h under 660 ℃ the condition with type alpha+beta titanium alloy rod bar described in the step 2, eliminate the bar residual stress in temperature;
Step 4, the type alpha+beta titanium alloy rod bar of eliminating residual stress in the step 3 is carried out the rough turn processing of outer surface and the end face car is flat, car descales and blemish, reaches the roughness of surface inspection; Carry out nondestructive flaw detection examination; Subsequently bar is placed on the T2150 deep hole drilling and boring machine equipment and carries out the bta deep hole drilling boring, the lathe rotating speed is 60r/min, and the amount of feeding is 0.07mm/r; Draw and make Φ 290mm * 2000mm bar, process and the alpha and beta type titan alloy cylindrical shell blank of bar with length;
Step 5, the cylindrical shell of alpha and beta type titan alloy described in step 4 blank is carried out inner surface right boring and outer surface finish turning handle, obtain being of a size of the TC4 alpha and beta type titan alloy thick-wall cylinder of Φ 380mm * 15mm * 2000mm.
The tensile strength Rm of the TC4 alpha and beta type titan alloy thick-wall cylinder of present embodiment preparation is 915MPa, and yield strength Rp0.2 is 845MPa, and percentage elongation A is 16%, and contraction percentage of area Z is 48%.
Embodiment 5
Wall thickness is the manufacturing of the TC4 alpha and beta type titan alloy heavy wall overpressure resistant barrel of 30mm:
Step 1, employing TC4 alpha and beta type titan alloy ingot casting are raw material, forge machine soon with 1600T the raw material ingot casting is forged 3 fire in the cogging of β phase region, and the inferior final forging temperature of every fire all is not less than 950 ℃, obtains the excellent base of alpha and beta type titan alloy; Wherein: the first fire time initial forging temperature is 1180 ℃, and the second fire time initial forging temperature is 1100 ℃, and the 3rd fire time initial forging temperature is 1050 ℃, and each fire time forging ratio is followed successively by 1.8,1.5 and 1.3;
Step 2,2 fire are forged in jumping-up, pulling repeatedly with alpha and beta type titan alloy described in step 1 rod base; First fiery forging temperature is following 10 ℃ of excellent base beta transformation point, and the second fire time forging temperature is following 70 ℃ of an excellent base beta transformation point, and the inferior forging ratio of first fire is 4.5; The second fire time forging ratio is 5.6; The inferior final forging temperature of every fire all is not less than 800 ℃, forges last fire and carries out shaping, returns circle, obtains the Φ 500mm * 2500mm bar of better linearity and circularity;
Step 3, be annealing in process 0.5h under 850 ℃ the condition with type alpha+beta titanium alloy rod bar described in the step 2, eliminate the bar residual stress in temperature;
Step 4, the type alpha+beta titanium alloy rod bar of eliminating residual stress in the step 3 is carried out the rough turn processing of outer surface and the end face car is flat, car descales and blemish, reaches the roughness of surface inspection; Carry out nondestructive flaw detection examination; Subsequently bar is placed on the T2150 deep hole drilling and boring machine equipment and carries out the bta deep hole drilling boring, the lathe rotating speed is 120r/min, and the amount of feeding is 0.02mm/r; Draw and make Φ 330mm * 2500mm bar, process and the alpha and beta type titan alloy cylindrical shell blank of bar with length;
Step 5, the cylindrical shell of alpha and beta type titan alloy described in step 4 blank is carried out inner surface right boring and outer surface finish turning handle, obtain being of a size of the TC4 alpha and beta type titan alloy thick-wall cylinder of Φ 485mm * 30mm * 2500mm.
The tensile strength Rm of the TC4 alpha and beta type titan alloy thick-wall cylinder of present embodiment preparation is 935MPa, and yield strength Rp0.2 is 860MPa, and percentage elongation A is 19%, and contraction percentage of area Z is 55%.
Embodiment 6
Wall thickness is the manufacturing of the TC4 alpha and beta type titan alloy heavy wall overpressure resistant barrel of 21mm:
Step 1, employing TC4 alpha and beta type titan alloy ingot casting are raw material, forge machine soon with 1600T the raw material ingot casting is forged 2 fire in the cogging of β phase region, and the inferior final forging temperature of every fire all is not less than 950 ℃, obtains the excellent base of alpha and beta type titan alloy; Wherein: the first fire time initial forging temperature is 1120 ℃, and the second fire time initial forging temperature is 1050 ℃, and each fire time forging ratio is followed successively by 1.8 and 1.9;
Step 2, with alpha and beta type titan alloy described in step 1 rod base repeatedly jumping-up, pulling forge 4 fire, the first fire time forging temperature is below the excellent base beta transformation point 10 ℃, the second fire time forging temperature is below the excellent base beta transformation point 30 ℃; The 3rd fiery forging temperature is following 50 ℃ of excellent base beta transformation point, and the 4th fire time forging temperature is following 70 ℃ of an excellent base beta transformation point, and the inferior forging ratio of first fire is 2.8; The second fire time forging ratio is 2.6; The second fire time forging ratio is that 2.6, the four fire time forging ratios are 2.5, and the inferior final forging temperature of every fire all is not less than 800 ℃; Forge last fire and carry out shaping, return circle, obtain the Φ 400mm * 2000mm bar of better linearity and circularity;
Step 3, be annealing in process 4h under 750 ℃ the condition with type alpha+beta titanium alloy rod bar described in the step 2, eliminate the bar residual stress in temperature;
Step 4, the type alpha+beta titanium alloy rod bar of eliminating residual stress in the step 3 is carried out the rough turn processing of outer surface and the end face car is flat, car descales and blemish, reaches the roughness of surface inspection; Carry out nondestructive flaw detection examination; Subsequently bar is placed on the T2150 deep hole drilling and boring machine equipment and carries out the bta deep hole drilling boring, the lathe rotating speed is 20r/min, and the amount of feeding is 0.12mm/r; Draw and make Φ 275mm * 2000mm bar, process and the alpha and beta type titan alloy cylindrical shell blank of bar with length;
Step 5, the cylindrical shell of alpha and beta type titan alloy described in step 4 blank is carried out inner surface right boring and outer surface finish turning handle, obtain being of a size of the TC4 alpha and beta type titan alloy thick-wall cylinder of Φ 386mm * 21mm * 2000mm.
The tensile strength Rm of the TC4 alpha and beta type titan alloy thick-wall cylinder of present embodiment preparation is 925MPa, and yield strength Rp0.2 is 855MPa, and percentage elongation A is 18%, and contraction percentage of area Z is 53%.
Embodiment 7
Wall thickness is the manufacturing of nearly β type β-C titanium alloy heavy wall overpressure resistant barrel of 90mm:
Step 1, employing nearly β type β-C titan alloy casting ingot are raw material; With fast forging machine the raw material ingot casting is forged 2 fire in the cogging of β phase region; The inferior final forging temperature of every fire all is not less than 950 ℃; Obtain nearly beta titanium alloy rod base, wherein: the inferior initial forging temperature of each fire is followed successively by 1180 ℃ and 1050 ℃, and the inferior forging ratio of each fire is followed successively by 1.8 and 1.5;
Step 2,7 fire are forged in jumping-up, pulling repeatedly with nearly beta titanium alloy rod base described in the step 1; The inferior forging temperature of first and second fire is above 150 ℃ of excellent base beta transformation point; The inferior forging temperature of third and fourth fire is above 100 ℃ of excellent base beta transformation point; Five, the 6th and the 7th fiery time forging temperature is above 50 ℃ of excellent base beta transformation point, and each fire time forging ratio is followed successively by 2.8,1.3,2.4,1.7,2.4,1.8 and 2.3, and the inferior final forging temperature of every fire all is not less than 800 ℃; Forge last fire and carry out shaping, return circle, obtain the nearly beta titanium alloy bar of Φ 450mm * 1900mm of better linearity and circularity;
Step 3, nearly beta titanium alloy bar described in the step 2 is carried out solution treatment, eliminate the bar residual stress; The system of said solution treatment is: above 10 ℃ of solid solubility temperature beta transformation point, temperature retention time 2h;
Step 4, the nearly beta titanium alloy bar of eliminating residual stress in the step 3 is carried out the rough turn processing of outer surface and the end face car is flat, car descales and blemish, reaches the roughness of surface inspection; Carry out nondestructive flaw detection examination; Subsequently bar is placed on the T2150 deep hole drilling and boring machine equipment and carries out the bta deep hole drilling boring, the lathe rotating speed is 20r/min, and the amount of feeding is 0.12mm/r; Draw and make Φ 160mm * 1900mm bar, process and the nearly beta titanium alloy cylindrical shell blank of bar with length;
Step 5, nearly beta titanium alloy cylindrical shell blank described in the step 4 is carried out the inner surface right boring and the outer surface finish turning is handled; Then the beta titanium alloy cylindrical shell blank after handling is carried out Ageing Treatment; Aging temperature is 530 ℃; Temperature retention time 12h obtains being of a size of nearly β type β-C titanium alloy thick-wall cylinder of Φ 410mm * 90mm * 1900mm.
The tensile strength Rm of the nearly β type β-C titanium alloy thick-wall cylinder of present embodiment preparation is 1250MPa, and yield strength Rp0.2 is 1120MPa, and percentage elongation A is 7%, and contraction percentage of area Z is 25%.
Embodiment 8
Wall thickness is the manufacturing of nearly β type β-C titanium alloy heavy wall overpressure resistant barrel of 60mm:
Step 1, employing nearly β type β-C titan alloy casting ingot are raw material; With fast forging machine the raw material ingot casting is forged 3 fire in the cogging of β phase region; The inferior final forging temperature of every fire all is not less than 950 ℃; Obtain nearly beta titanium alloy rod base, wherein: the inferior initial forging temperature of each fire is followed successively by 1150 ℃, 1100 ℃ and 1050 ℃, and each fire time forging ratio is followed successively by 1.5,1.4 and 1.3;
Step 2,2 fire are forged in jumping-up, pulling repeatedly with nearly beta titanium alloy rod base described in the step 1; The inferior forging temperature of first fire is above 150 ℃ of an excellent base beta transformation point; Second fiery time forging temperature is above 130 ℃ of an excellent base beta transformation point, and each fire time forging ratio is followed successively by 4.3 and 5.8, and the inferior final forging temperature of every fire all is not less than 800 ℃; Forge last fire and carry out shaping, return circle, obtain the nearly beta titanium alloy bar of Φ 410mm * 2000mm of better linearity and circularity;
Step 3, nearly beta titanium alloy bar described in the step 2 is carried out solution treatment, eliminate the bar residual stress; The system of said solution treatment is: above 50 ℃ of solid solubility temperature beta transformation point, temperature retention time 0.5h;
Step 4, the nearly beta titanium alloy bar of eliminating residual stress in the step 3 is carried out the rough turn processing of outer surface and the end face car is flat, car descales and blemish, reaches the roughness of surface inspection; Carry out nondestructive flaw detection examination; Subsequently bar is placed on the T2150 deep hole drilling and boring machine equipment and carries out the bta deep hole drilling boring, the lathe rotating speed is 120r/min, and the amount of feeding is 0.02mm/r; Draw and make Φ 210mm * 2000mm bar, process and the nearly beta titanium alloy cylindrical shell blank of bar with length;
Step 5, nearly beta titanium alloy cylindrical shell blank described in the step 4 is carried out the inner surface right boring and the outer surface finish turning is handled; Then the beta titanium alloy cylindrical shell blank after handling is carried out Ageing Treatment; Aging temperature is 500 ℃; Temperature retention time 24h obtains being of a size of nearly β type β-C titanium alloy thick-wall cylinder of Φ 360mm * 60mm * 2000mm.
The tensile strength Rm of the nearly β type β-C titanium alloy thick-wall cylinder of present embodiment preparation is 1300MPa, and yield strength Rp0.2 is 1200MPa, and percentage elongation A is 6%, and contraction percentage of area Z is 23%.
Embodiment 9
Wall thickness is the manufacturing of nearly β type β-C titanium alloy heavy wall overpressure resistant barrel of 80mm:
Step 1, employing nearly β type β-C titan alloy casting ingot are raw material; With fast forging machine the raw material ingot casting is forged 3 fire in the cogging of β phase region; The inferior final forging temperature of every fire all is not less than 950 ℃; Obtain nearly beta titanium alloy rod base, wherein: the inferior initial forging temperature of each fire is followed successively by 1180 ℃, 1120 ℃ and 1070 ℃, and each fire time forging ratio is followed successively by 1.8,1.6 and 1.5;
Step 2,4 fire are forged in jumping-up, pulling repeatedly with nearly beta titanium alloy rod base described in the step 1; The inferior forging temperature of first fire is above 150 ℃ of an excellent base beta transformation point; The inferior forging temperature of second fire is above 130 ℃ of an excellent base beta transformation point, and the inferior forging temperature of the 3rd fire is above 100 ℃ of an excellent base beta transformation point, and the 4th fiery time forging temperature is above 60 ℃ of an excellent base beta transformation point; Each fire time forging ratio is followed successively by 3.2,2.9,2.8 and 2.6; The inferior final forging temperature of every fire all is not less than 800 ℃, forges last fire and carries out shaping, returns circle, obtains the nearly beta titanium alloy bar of Φ 500mm * 2500mm of better linearity and circularity;
Step 3, nearly beta titanium alloy bar described in the step 2 is carried out solution treatment, eliminate the bar residual stress; The system of said solution treatment is: above 30 ℃ of solid solubility temperature beta transformation point, temperature retention time 1h;
Step 4, the nearly beta titanium alloy bar of eliminating residual stress in the step 3 is carried out the rough turn processing of outer surface and the end face car is flat, car descales and blemish, reaches the roughness of surface inspection; Carry out nondestructive flaw detection examination; Subsequently bar is placed on the T2150 deep hole drilling and boring machine equipment and carries out the bta deep hole drilling boring, the lathe rotating speed is 80r/min, and the amount of feeding is 0.09mm/r; Draw and make Φ 230mm * 2500mm bar, process and the nearly beta titanium alloy cylindrical shell blank of bar with length;
Step 5, nearly beta titanium alloy cylindrical shell blank described in the step 4 is carried out the inner surface right boring and the outer surface finish turning is handled; Then the beta titanium alloy cylindrical shell blank after handling is carried out Ageing Treatment; Aging temperature is 570 ℃; Temperature retention time 8h obtains being of a size of nearly β type β-C titanium alloy thick-wall cylinder of Φ 450mm * 80mm * 2500mm.
The tensile strength Rm of the nearly β type β-C titanium alloy thick-wall cylinder of present embodiment preparation is 1201MPa, and yield strength Rp0.2 is 1130MPa, and percentage elongation A is 8%, and contraction percentage of area Z is 28%.
The above; It only is preferred embodiment of the present invention; Be not that the present invention is done any restriction, every according to inventing technical spirit to any simple modification, change and equivalent structure variation that above embodiment did, all still belong in the protection domain of technical scheme of the present invention.
Claims (9)
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