CN102967693B - Penetrant detection and defect mending method in titanium alloy cast piece machining - Google Patents
Penetrant detection and defect mending method in titanium alloy cast piece machining Download PDFInfo
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- CN102967693B CN102967693B CN201210451595.3A CN201210451595A CN102967693B CN 102967693 B CN102967693 B CN 102967693B CN 201210451595 A CN201210451595 A CN 201210451595A CN 102967693 B CN102967693 B CN 102967693B
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Abstract
The invention discloses a penetrant detection and defect mending method in titanium alloy cast piece machining, for carrying out penetrant detection in different periods in titanium alloy cast piece machining. In the detection, pretreatment processes including corrosion, heat treatment and ultrasonic cleaning are adopted to carry out pretreatment on the surface of a titanium alloy cast piece; and a good surface state is provided when the penetrant detection is carried out when the titanium alloy cast piece is formed, so that the efficiency of penetrant detection and the accuracy of detection result are improved. According to the method, discovered defects are subjected to pickling and corrosion and ultrasonic cleaning so as to eliminate the defects. An experiment shows that when the titanium alloy cast piece is subjected to further penetrant detection after the welding thermal treatment, casting defects are revealed again on the surface of components, so that the detection rate of the surface defects of the titanium alloy cast piece is ensured, the consistency of detection conclusion of multiple times is improved, and meanwhile the forming efficiency in the titanium alloy cast piece machining is increased by 50%, and reference for a penetrant detection surface pretreatment process of complexly structured cast pieces of other materials is provided.
Description
Technical field
This method relates to a kind of titanium alloy casting in whole forming process, in the time that different phase is permeated detection, adopt different process for surface preparation, adopt the pretreating process of burn into thermal treatment and Ultrasonic Cleaning that the surperficial method of preparing is provided for infiltration detects.
Background technology
Infiltration detects as one of five large conventional lossless detection methods, for checking metal and non-metal material surface flaws, has a wide range of applications at aerospace field.Infiltration detects and requires tighter to piece surface state, part remains a lot of dirts through operation rear surfaces such as machine works, as dust, greasy dirt, metal processing scraps and oxide skin etc., while causing infiltration to detect due to the impact of these dirts, the recall rate of surface defects of parts is low.
Infiltration comprises mechanical chipping, chemical cleaning and solvent cleaning to the process for surface preparation of part while detection, but there is no at present clear and definite method regulation at which kind of preprocess method of this employing of different processing stages of Same Part.In the innovation and creation that are CN102466644A at publication number, a kind of permeation flaw detection method of surface of the work flaws is disclosed.In the method, relate to the prerinse that infiltration detects, can adopt the solvent cleaning of alcohol or acetone, or trichloroethylene steam cleans, or water vapor cleans, or pickling, or alkali cleaning, but do not relate to Same Part in different phase, as after woollen state, roughing, after welding or the final finished stage, permeate this employing which kind of method while detection part is carried out to pre-service to reach the requirement of infiltration detection to piece surface state.
At present, the domestic process for surface preparation that generally adopts thermal treatment and blast to detect as infiltration to titanium alloy casting, this process exposes insufficient to tiny defect, and the tiny grains of sand easily stop up defect opening, reduce the brightness of penetrating fluid, affects the accuracy of test result.Titanium alloy casting manufacturing procedure is many simultaneously, the cycle is long, generally in process, to repeatedly permeate detection, as arranged respectively infiltration detection after woollen, roughing, after welding and before finished product warehouse-in, still there is casting flaw but add surface at the non-machine of fabricated part, have that check result repeatability is poor, the inconsistent problem of conclusion.Owing to carrying out blockade on new techniques abroad, it is unknown which kind of method external titanium alloy casting adopts carry out surface preparation for infiltration detects in forming process.
Summary of the invention
Expose insufficiently for overcoming in the titanium alloy casting forming process existing in prior art tiny defect, the lower deficiency of accuracy of detection, the present invention proposes infiltration detection and defect-restoration method therefor in a kind of titanium alloy workpiece processing.
Concrete steps of the present invention are:
Step 1, permeates and detects and repair the defect existing foundry goods.Described foundry goods permeated and detects and repair the process of defect existing and be:
A. foundry goods is permeated to detection, adopt conventional method, the foundry goods of casting forming is carried out to high temperature insostatic pressing (HIP), the temperature of high temperature insostatic pressing (HIP) is 900 DEG C-1100 DEG C.Adopt conventional method, the foundry goods through high temperature insostatic pressing (HIP) is permeated to detection.
B. to fault location, polishing is repaired.To the fault location pneumatic grinding wheel repairing of polishing of finding in detecting.Position after repairing is corroded.
C. infiltration detects and repairs the defect still existing for the second time.By after the foundry goods of local corrosion is rinsed well with clear water, again permeate detection after being placed in temperature and being the baking oven finish-drying of 120 DEG C-150 DEG C.If defect not completely remove, to rejected region re-start as stated above polishing repair and corrode after again permeate detection.After corrosion, carry out Ultrasonic Cleaning to repairing position.
D. vacuum heat.Before to foundry goods roughing, adopting conventional method is 1 × 10-2Pa to foundry goods in vacuum tightness, and temperature is to carry out vacuum heat in the vacuum drying oven of 450 DEG C.
E. infiltration detects and repairs the defect still existing for the third time.Foundry goods through vacuum heat is permeated to detection again.The defect polishing of finding during infiltration is detected is repaired, and the foundry goods after repairing is carried out after Ultrasonic Cleaning.Again test, to the fault location pneumatic grinding wheel repairing of polish of finding in detecting, and the position after repairing is corroded.
The foundry goods obtaining is carried out to roughing by the mode of machining, obtain half-finished parts.
Step 2, permeates and detects and repair the defect existing the half-finished parts after roughing.Described half-finished parts after roughing permeated and detects and repair the process of defect existing and be:
A. to the half-finished parts depollution after roughing.Adopt the mode of pickling to described half-finished parts depollution.To half-finished parts
B. by after the half-finished parts of overpickling is rinsed well with clear water, be placed in temperature and be the baking oven finish-drying of 120 DEG C-150 DEG C, obtain the half-finished parts after depollution.Half-finished parts after depollution is welded, obtain semi-manufacture assembly.
Step 3, permeates and detects and repair the defect existing the semi-manufacture assembly obtaining after welding.The described process that the semi-manufacture assembly that obtains after welding permeate to the defect that detects and repair existence is:
A. the semi-manufacture assembly obtaining after welding is heat-treated according to conventional heat treatment method.Be 1 × 10 in vacuum tightness
-2pa, temperature is to carry out vacuum heat in the vacuum drying oven of 450 DEG C, and adopts conventional method to permeate detection to the semi-manufacture assembly through vacuum heat.If semi-manufacture assembly still exists defect, rejected region is polished and repaired and again after Ultrasonic Cleaning, permeate detection semi-manufacture assembly by the polishing of defect described in step 2 repair procedures.
B. the semi-manufacture assembly detecting by infiltration is carried out to finishing, obtain fabricated part.
Step 4, finally detects and repairs the defect existing to fabricated part.In the time that fabricated part is finally detected, employing method for suppersonic cleaning permeates detection to fabricated part after fabricated part is permeated to the pre-service detecting again.Find after defect, to rejected region polishing, fabricated part is carried out again permeating detection after Ultrasonic Cleaning.
When titanium alloy workpiece is corroded, the mixed solution corrosion that the nitric acid that the hydrofluorite that employing concentration is 45-55g/L and concentration are 180-220g/L forms 1 minute; The ratio of described hydrofluorite and nitric acid is 1:1.
When titanium alloy workpiece is carried out to Ultrasonic Cleaning, it is to clean 5 minutes by ultrasonic vibration in 5%～10% clean-out system that part is immersed in to concentration, and solution temperature is 60 DEG C-75 DEG C.Automatically washing 5 minutes, the hot water of putting into temperature and be 50 DEG C-60 DEG C soaks 10 minutes.It is dry 1 hour of the baking oven of 120 DEG C that part is placed in to temperature, the foundry goods that obtains detecting by infiltration.The clean-out system of described Ultrasonic Cleaning is ARDROX 6333A clean-out system.
The different processing stages that the present invention is titanium alloy casting permeates while detection provides good surface state, improves the recall rate of piece surface fine defects, improves part and shapes efficiency.
The present invention is in part woollen casting process, after infiltration detects and is arranged in high temperature insostatic pressing (HIP), to repeatedly permeating detection after defective parts repair in detecting after repairing position local corrosion.If defect is not removed, defect polishing position is repeated to above-mentioned work, same position corrosion number of times should not exceed 2 times, carries out Ultrasonic Cleaning and repeatedly corrodes part is caused to damage avoiding if exceed 2 reply defect polishing positions.
In the time that woollen enters factory's reinspection, after being heat-treated, part permeates again detection, fully expose the casting flaw of piece surface, to defect was removed in time in the woollen stage.
During to component detection, if having depollution operation before welding, in the time detecting weldquality, reply part all surface is tested, and finds in time the surperficial casting flaw that depollution operation comes out.After components welding completes and heat-treats, increase infiltration and detect operation, to find the surface imperfection exposing because of thermal treatment.
During for fabricated part final inspection, adopt Ultrasonic Cleaning to carry out pre-service to part.
The present invention is in the forming process of titanium alloy casting, in the time that permeating detection, different phase adopts different process for surface preparation, adopt the pretreating process of burn into thermal treatment and Ultrasonic Cleaning that the surperficial method of preparing is provided for infiltration detects, this provides good surface state while detection for titanium alloy casting permeates in forming process, thereby has improved the efficiency of infiltration detection and the accuracy of testing result.
In the present invention, the defect that titanium alloy casting exists constantly detects discovery by infiltration, repair by polishing, corrosion, and carry out again testing after Ultrasonic Cleaning, make up deficiency of the prior art, guaranteed the recall rate of surface defects of parts, improved the consistance of repeated detection conclusion, while part shapes efficiency and has improved 50%, and provides reference for the infiltration of other material Complicated structure casting detects surface pre-treating process method.
Taking certain aeromotor titanium alloy tooth case foundry goods as example.This titanium alloy casting profile complexity (seeing accompanying drawing 1), easily produce defect (seeing accompanying drawing 2) in cast(ing) surface thin and thick abrupt change of cross-section place, the differing formed stage at this foundry goods reasonably combines high temperature insostatic pressing (HIP), burn into thermal treatment and ultrasonic cleaning process with infiltration characterization processes, on the basis of original characterization processes, foundry goods is entered before factory reviews to increase Technology for Heating Processing, process by these casting flaw that fully exposes cast(ing) surface, defect was got rid of in time in the woollen stage; Increase bite and ultrasonic cleaning process for polishing position, guaranteed that defect is thoroughly removed.Checking by experiment, this part again permeates while detection after sweating heat is processed, and piece surface exposes casting flaw again.
Brief description of the drawings
Fig. 1 is the schematic diagram of certain titanium alloy casting housing;
Fig. 2 easily produces rejected region schematic diagram in thin and thick abrupt change of cross-section place;
Fig. 3 is after processing by the present invention, the Flaw display that piece surface exposes again, and wherein 1,2,4 is respectively three place's inclusion defects, the 3rd, welding incomplete fusion defect.
Fig. 4 is process flow diagram of the present invention.
Embodiment
Embodiment 1
The present embodiment is infiltration detection and the defect-restoration method therefor in a kind of titanium alloy workpiece processing, and its concrete steps are:
Step 1, permeates and detects and repair the defect existing foundry goods.Described foundry goods permeated and detects and repair the process of defect existing and be:
A. foundry goods is permeated to detection, adopt conventional method, the foundry goods of casting forming is carried out to high temperature insostatic pressing (HIP), the temperature of high temperature insostatic pressing (HIP) is 900 DEG C-1100 DEG C.Adopt conventional method, the foundry goods through high temperature insostatic pressing (HIP) is permeated to detection.In the present embodiment, the temperature of high temperature insostatic pressing (HIP) is 1000 DEG C
B. to fault location, polishing is repaired.To the fault location pneumatic grinding wheel repairing of polishing of finding in detecting.The mixed solution local corrosion that the nitric acid that the hydrofluorite that is 45-55g/L to repairing position employing concentration and concentration are 180-220g/L forms 1 minute; The ratio of described hydrofluorite and nitric acid is 1:1.In the present embodiment, the concentration of hydrofluorite is 54g/L, and the concentration of nitric acid is 210g/L.
C. infiltration detects and repairs the defect still existing for the second time.By after the foundry goods of local corrosion is rinsed well with clear water, again permeate detection after being placed in temperature and being the baking oven finish-drying of 120 DEG C-150 DEG C.If defect not completely remove, to rejected region re-start as stated above polishing repair and corrode after again permeate detection.The at most corrosion 2 times of same position, corrode 2 times afterwards reply repairing position carry out Ultrasonic Cleaning, repeatedly corrode part caused to damage avoiding.The concrete technology of Ultrasonic Cleaning is as follows: it is to clean 5 minutes by ultrasonic vibration in 5%～10% ARDROX6333A clean-out system that part is immersed in to concentration, and solution temperature is 60 DEG C-75 DEG C.Automatically washing 5 minutes, the hot water of putting into temperature and be 50 DEG C-60 DEG C soaks 10 minutes.It is dry 1 hour of the baking oven of 120 DEG C that part is placed in to temperature, the foundry goods that obtains detecting by infiltration.In the present embodiment, oven temperature is 130 DEG C, and the concentration of clean-out system is 9.1%, and solution temperature is 65 DEG C.The temperature of soaking hot water is 55 DEG C.
D. vacuum heat.Before to foundry goods roughing, adopting conventional method is 1 × 10 to foundry goods in vacuum tightness
-2pa, temperature is to carry out vacuum heat in the vacuum drying oven of 450 DEG C.
E. infiltration detects and repairs the defect still existing for the third time.Foundry goods through vacuum heat is permeated to detection again.The defect polishing of finding during infiltration is detected is repaired, and the foundry goods after repairing is carried out after Ultrasonic Cleaning.Again test, to fault location pneumatic grinding wheel repairings of polish of finding in detecting, then to repairing the mixed solution local corrosion 1 minute of the nitric acid formation that hydrofluorite that position employing concentration is 45-55g/L and concentration are 180-220g/L; The ratio of described hydrofluorite and nitric acid is 1:1.In the present embodiment, the concentration of hydrofluorite is 54g/L, and the concentration of nitric acid is 210g/L.
By step 1, most of defect of foundry goods being carried out to machining front row, is removed on foundry goods, for follow-up machine work provides qualified foundry goods.The foundry goods obtaining is carried out to roughing by the mode of machining, obtain half-finished parts.
Step 2, permeates and detects and repair the defect existing the half-finished parts after roughing.Described half-finished parts after roughing permeated and detects and repair the process of defect existing and be:
A. to the half-finished parts depollution after roughing.Adopt the mode of pickling to described half-finished parts depollution.The mixed solution corrosion that the nitric acid that the hydrofluorite that is 45-55g/L to half-finished parts employing concentration and concentration are 180-220g/L forms 1 minute; The ratio of described hydrofluorite and nitric acid is 1:1.In the present embodiment, the concentration of hydrofluorite is 54g/L, and the concentration of nitric acid is 210g/L.
B. by after the half-finished parts of overpickling is rinsed well with clear water, be placed in temperature and be the baking oven finish-drying of 120 DEG C-150 DEG C, obtain the half-finished parts after depollution.Half-finished parts after depollution is welded, obtain semi-manufacture assembly.In the present embodiment, oven temperature is 130 DEG C.
Step 3, permeates and detects and repair the defect existing the semi-manufacture assembly obtaining after welding.The described process that the semi-manufacture assembly that obtains after welding permeate to the defect that detects and repair existence is:
A. the semi-manufacture assembly obtaining after welding is heat-treated according to conventional heat treatment method.Be 1 × 10 in vacuum tightness
-2pa, temperature is to carry out vacuum heat in the vacuum drying oven of 450 DEG C, and adopts conventional method to permeate detection to the semi-manufacture assembly through vacuum heat.If semi-manufacture assembly still exists defect, rejected region is polished and repaired and again after Ultrasonic Cleaning, permeate detection semi-manufacture assembly by the polishing of defect described in step 2 repair procedures.The concrete technology of described Ultrasonic Cleaning is as follows: it is to clean 5 minutes by ultrasonic vibration in 5%～10% ARDROX 6333A clean-out system that semi-manufacture assembly is immersed in to concentration, and solution temperature is 60 DEG C-75 DEG C.Automatically washing 5 minutes, puts into temperature and is the hot water 10 minutes of 50 DEG C-60 DEG C.It is dry 1 hour of the baking oven of 120 DEG C that semi-manufacture assembly is placed in to temperature, the semi-manufacture assembly that obtains detecting by infiltration.
In the present embodiment, oven temperature is 130 DEG C, and the concentration of clean-out system is 9.1%, and solution temperature is 65 DEG C.The temperature of soaking hot water is 55 DEG C.
B. the semi-manufacture assembly detecting by infiltration is carried out to finishing, obtain fabricated part.
By this step, the defect of discovery was eliminated in time in this stage, create good condition for subsequent fine processing, shorten to a certain extent the process-cycle of this part.
Step 4, finally detects and repairs the defect existing to fabricated part.In the time that fabricated part is finally detected, employing method for suppersonic cleaning permeates detection to fabricated part after fabricated part is permeated to the pre-service detecting again.Find after defect, to rejected region polishing, fabricated part is carried out again permeating detection after Ultrasonic Cleaning.The concrete technology of Ultrasonic Cleaning is as follows: it is to clean 5 minutes by ultrasonic vibration in 5%～10% ARDROX 6333A clean-out system that part is immersed in to concentration, solution temperature is 60 DEG C-75 DEG C, then automatically wash 5 minutes, the hot water of putting into temperature again and be 50 DEG C-60 DEG C soaks 10 minutes, and taking out part is in the baking oven of 130 DEG C dry 1 hour in temperature.
In the present embodiment, the concentration of clean-out system is 9.1%, and solution temperature is 65 DEG C.The temperature of soaking hot water is 55 DEG C.
Described infiltration detects and adopts conventional method.
By experiment, part is permeated after detection in different phase to step 4 by above-mentioned steps 1, in the time that finished parts permeates detection, qualification rate has improved 12%.
Embodiment 2
The present embodiment is infiltration detection and the defect-restoration method therefor in a kind of titanium alloy workpiece processing, and its concrete steps are:
Step 1, permeates and detects and repair the defect existing foundry goods.Described foundry goods permeated and detects and repair the process of defect existing and be:
A. foundry goods is permeated to detection, adopt conventional method, the foundry goods of casting forming is carried out to high temperature insostatic pressing (HIP), the temperature of high temperature insostatic pressing (HIP) is 900 DEG C-1100 DEG C.Adopt conventional method, the foundry goods through high temperature insostatic pressing (HIP) is permeated to detection.In the present embodiment, the temperature of high temperature insostatic pressing (HIP) is 900 DEG C.
B. to fault location, polishing is repaired.To the fault location pneumatic grinding wheel repairing of polishing of finding in detecting.The mixed solution local corrosion that the nitric acid that the hydrofluorite that is 45-55g/L to repairing position employing concentration and concentration are 180-220g/L forms 1 minute; The ratio of described hydrofluorite and nitric acid is 1:1.In the present embodiment, the concentration of hydrofluorite is 45g/L, and the concentration of nitric acid is 180g/L.
C. infiltration detects and repairs the defect still existing for the second time.By after the foundry goods of local corrosion is rinsed well with clear water, again permeate detection after being placed in temperature and being the baking oven finish-drying of 120 DEG C-150 DEG C.If defect not completely remove, to rejected region re-start as stated above polishing repair and corrode after again permeate detection.The at most corrosion 2 times of same position, corrode 2 times afterwards reply repairing position carry out Ultrasonic Cleaning, repeatedly corrode part caused to damage avoiding.The concrete technology of Ultrasonic Cleaning is as follows: it is to clean 5 minutes by ultrasonic vibration in 5%～10% ARDROX6333A clean-out system that part is immersed in to concentration, and solution temperature is 60 DEG C-75 DEG C.Automatically washing 5 minutes, the hot water of putting into temperature and be 50 DEG C-60 DEG C soaks 10 minutes.It is dry 1 hour of the baking oven of 120 DEG C that part is placed in to temperature, the foundry goods that obtains detecting by infiltration.In the present embodiment, oven temperature is 120 DEG C, and the concentration of clean-out system is 5.0%, and solution temperature is 60 DEG C.The temperature of soaking hot water is 50 DEG C.
D. vacuum heat.Before to foundry goods roughing, adopting conventional method is 1 × 10 to foundry goods in vacuum tightness
-2pa, temperature is to carry out vacuum heat in the vacuum drying oven of 450 DEG C.
E. infiltration detects and repairs the defect still existing for the third time.Foundry goods through vacuum heat is permeated to detection again.The defect polishing of finding during infiltration is detected is repaired, and the foundry goods after repairing is carried out after Ultrasonic Cleaning.Again test, to fault location pneumatic grinding wheel repairings of polish of finding in detecting, then to repairing the mixed solution local corrosion 1 minute of the nitric acid formation that hydrofluorite that position employing concentration is 45-55g/L and concentration are 180-220g/L; The ratio of described hydrofluorite and nitric acid is 1:1.In the present embodiment, the concentration of hydrofluorite is 45g/L, and the concentration of nitric acid is 180g/L.
By step 1, most of defect of foundry goods being carried out to machining front row, is removed on foundry goods, for follow-up machine work provides qualified foundry goods.The foundry goods obtaining is carried out to roughing by the mode of machining, obtain half-finished parts.
Step 2, permeates and detects and repair the defect existing the half-finished parts after roughing.Described half-finished parts after roughing permeated and detects and repair the process of defect existing and be:
A. to the half-finished parts depollution after roughing.Adopt the mode of pickling to described half-finished parts depollution.The mixed solution corrosion that the nitric acid that the hydrofluorite that is 45-55g/L to half-finished parts employing concentration and concentration are 180-220g/L forms 1 minute; The ratio of described hydrofluorite and nitric acid is 1:1.In the present embodiment, the concentration of hydrofluorite is 45g/L, and the concentration of nitric acid is 180g/L.
B. by after the half-finished parts of overpickling is rinsed well with clear water, be placed in temperature and be the baking oven finish-drying of 120 DEG C-150 DEG C, obtain the half-finished parts after depollution.Half-finished parts after depollution is welded, obtain semi-manufacture assembly.In the present embodiment, oven temperature is 120 DEG C.
Step 3, permeates and detects and repair the defect existing the semi-manufacture assembly obtaining after welding.The described process that the semi-manufacture assembly that obtains after welding permeate to the defect that detects and repair existence is:
A. the semi-manufacture assembly obtaining after welding is heat-treated according to conventional heat treatment method.Be 1 × 10 in vacuum tightness
-2pa, temperature is to carry out vacuum heat in the vacuum drying oven of 450 DEG C, and adopts conventional method to permeate detection to the semi-manufacture assembly through vacuum heat.If semi-manufacture assembly still exists defect, rejected region is polished and repaired and again after Ultrasonic Cleaning, permeate detection semi-manufacture assembly by the polishing of defect described in step 2 repair procedures.The concrete technology of described Ultrasonic Cleaning is as follows: it is to clean 5 minutes by ultrasonic vibration in 5%～10% ARDROX 6333A clean-out system that semi-manufacture assembly is immersed in to concentration, and solution temperature is 60 DEG C-75 DEG C.Automatically washing 5 minutes, puts into temperature and is the hot water 10 minutes of 50 DEG C-60 DEG C.It is dry 1 hour of the baking oven of 120 DEG C that semi-manufacture assembly is placed in to temperature, the semi-manufacture assembly that obtains detecting by infiltration.In the present embodiment, the concentration of ARDROX 6333A clean-out system is 5%, and oven temperature is 120 DEG C, and solution temperature is 60 DEG C.The temperature of soaking hot water is 50 DEG C.
B. the semi-manufacture assembly detecting by infiltration is carried out to finishing, obtain fabricated part.
By this step, the defect of discovery was eliminated in time in this stage, create good condition for subsequent fine processing, shorten to a certain extent the process-cycle of this part.
Step 4, finally detects and repairs the defect existing to fabricated part.In the time that fabricated part is finally detected, employing method for suppersonic cleaning permeates detection to fabricated part after fabricated part is permeated to the pre-service detecting again.Find after defect, to rejected region polishing, fabricated part is carried out again permeating detection after Ultrasonic Cleaning.The concrete technology of Ultrasonic Cleaning is as follows: it is to clean 5 minutes by ultrasonic vibration in 5%～10% ARDROX 6333A clean-out system that part is immersed in to concentration, solution temperature is 60 DEG C-75 DEG C, then automatically wash 5 minutes, the hot water of putting into temperature again and be 50 DEG C-60 DEG C soaks 10 minutes, and taking out part is in the baking oven of 130 DEG C dry 1 hour in temperature.
In the present embodiment, the concentration of clean-out system is 5.0%, and solution temperature is 60 DEG C.The temperature of soaking hot water is 50 DEG C.
Described infiltration detects and adopts conventional method.
By experiment, part is permeated after detection in different phase to step 4 by above-mentioned steps 1, in the time that finished parts permeates detection, qualification rate has improved 12%.
Embodiment 3
The present embodiment is infiltration detection and the defect-restoration method therefor in a kind of titanium alloy workpiece processing, and its concrete steps are:
Step 1, permeates and detects and repair the defect existing foundry goods.Described foundry goods permeated and detects and repair the process of defect existing and be:
A. foundry goods is permeated to detection, adopt conventional method, the foundry goods of casting forming is carried out to high temperature insostatic pressing (HIP), the temperature of high temperature insostatic pressing (HIP) is 900 DEG C-1100 DEG C.Adopt conventional method, the foundry goods through high temperature insostatic pressing (HIP) is permeated to detection.In the present embodiment, the temperature of high temperature insostatic pressing (HIP) is 1100 DEG C.
B. to fault location, polishing is repaired.To the fault location pneumatic grinding wheel repairing of polishing of finding in detecting.The mixed solution local corrosion that the nitric acid that the hydrofluorite that is 45-55g/L to repairing position employing concentration and concentration are 180-220g/L forms 1 minute; The ratio of described hydrofluorite and nitric acid is 1:1.In the present embodiment, the concentration of hydrofluorite is 55g/L, and the concentration of nitric acid is 220g/L.
C. infiltration detects and repairs the defect still existing for the second time.By after the foundry goods of local corrosion is rinsed well with clear water, again permeate detection after being placed in temperature and being the baking oven finish-drying of 120 DEG C-150 DEG C.If defect not completely remove, to rejected region re-start as stated above polishing repair and corrode after again permeate detection.The at most corrosion 2 times of same position, corrode 2 times afterwards reply repairing position carry out Ultrasonic Cleaning, repeatedly corrode part caused to damage avoiding.The concrete technology of Ultrasonic Cleaning is as follows: it is to clean 5 minutes by ultrasonic vibration in 5%～10% ARDROX6333A clean-out system that part is immersed in to concentration, and solution temperature is 60 DEG C-75 DEG C.Automatically washing 5 minutes, the hot water of putting into temperature and be 50 DEG C-60 DEG C soaks 10 minutes.It is dry 1 hour of the baking oven of 120 DEG C that part is placed in to temperature, the foundry goods that obtains detecting by infiltration.In the present embodiment, oven temperature is 150 DEG C, and the concentration of clean-out system is 10.0%, and solution temperature is 75 DEG C.The temperature of soaking hot water is 60 DEG C.
D. vacuum heat.Before to foundry goods roughing, adopting conventional method is 1 × 10-2Pa to foundry goods in vacuum tightness, and temperature is to carry out vacuum heat in the vacuum drying oven of 450 DEG C.
E. infiltration detects and repairs the defect still existing for the third time.Foundry goods through vacuum heat is permeated to detection again.The defect polishing of finding during infiltration is detected is repaired, and the foundry goods after repairing is carried out after Ultrasonic Cleaning.Again test, to fault location pneumatic grinding wheel repairings of polish of finding in detecting, then to repairing the mixed solution local corrosion 1 minute of the nitric acid formation that hydrofluorite that position employing concentration is 45-55g/L and concentration are 180-220g/L; The ratio of described hydrofluorite and nitric acid is 1:1.In the present embodiment, the concentration of hydrofluorite is 55g/L, and the concentration of nitric acid is 220g/L.
By step 1, most of defect of foundry goods being carried out to machining front row, is removed on foundry goods, for follow-up machine work provides qualified foundry goods.The foundry goods obtaining is carried out to roughing by the mode of machining, obtain half-finished parts.
Step 2, permeates and detects and repair the defect existing the half-finished parts after roughing.Described half-finished parts after roughing permeated and detects and repair the process of defect existing and be:
A. to the half-finished parts depollution after roughing.Adopt the mode of pickling to described half-finished parts depollution.The mixed solution corrosion that the nitric acid that the hydrofluorite that is 45-55g/L to half-finished parts employing concentration and concentration are 180-220g/L forms 1 minute; The ratio of described hydrofluorite and nitric acid is 1:1.In the present embodiment, the concentration of hydrofluorite is 55g/L, and the concentration of nitric acid is 220g/L.
B. by after the half-finished parts of overpickling is rinsed well with clear water, be placed in temperature and be the baking oven finish-drying of 120 DEG C-150 DEG C, obtain the half-finished parts after depollution.Half-finished parts after depollution is welded, obtain semi-manufacture assembly.In the present embodiment, oven temperature is 150 DEG C.
Step 3, permeates and detects and repair the defect existing the semi-manufacture assembly obtaining after welding.The described process that the semi-manufacture assembly that obtains after welding permeate to the defect that detects and repair existence is:
A. the semi-manufacture assembly obtaining after welding is heat-treated according to conventional heat treatment method.Be 1 × 10 in vacuum tightness
-2pa, temperature is to carry out vacuum heat in the vacuum drying oven of 450 DEG C, and adopts conventional method to permeate detection to the semi-manufacture assembly through vacuum heat.If semi-manufacture assembly still exists defect, rejected region is polished and repaired and again after Ultrasonic Cleaning, permeate detection semi-manufacture assembly by the polishing of defect described in step 2 repair procedures.The concrete technology of described Ultrasonic Cleaning is as follows: it is to clean 5 minutes by ultrasonic vibration in 5%～10% ARDROX 6333A clean-out system that semi-manufacture assembly is immersed in to concentration, and solution temperature is 60 DEG C-75 DEG C.Automatically washing 5 minutes, puts into temperature and is the hot water 10 minutes of 50 DEG C-60 DEG C.It is dry 1 hour of the baking oven of 120 DEG C that semi-manufacture assembly is placed in to temperature, the semi-manufacture assembly that obtains detecting by infiltration.In the present embodiment, the concentration of ARDROX 6333A clean-out system is 10%, and oven temperature is 150 DEG C, and solution temperature is 75 DEG C.The temperature of soaking hot water is 60 DEG C.
B. the semi-manufacture assembly detecting by infiltration is carried out to finishing, obtain fabricated part.
By this step, the defect of discovery was eliminated in time in this stage, create good condition for subsequent fine processing, shorten to a certain extent the process-cycle of this part.
Step 4, finally detects and repairs the defect existing to fabricated part.In the time that fabricated part is finally detected, employing method for suppersonic cleaning permeates detection to fabricated part after fabricated part is permeated to the pre-service detecting again.Find after defect, to rejected region polishing, fabricated part is carried out again permeating detection after Ultrasonic Cleaning.The concrete technology of Ultrasonic Cleaning is as follows: it is to clean 5 minutes by ultrasonic vibration in 5%～10% ARDROX 6333A clean-out system that part is immersed in to concentration, solution temperature is 60 DEG C-75 DEG C, then automatically wash 5 minutes, the hot water of putting into temperature again and be 50 DEG C-60 DEG C soaks 10 minutes, and taking out part is in the baking oven of 130 DEG C dry 1 hour in temperature.
In the present embodiment, the concentration of clean-out system is 10.0%, and solution temperature is 75 DEG C.The temperature of soaking hot water is 60 DEG C.
Described infiltration detects and adopts conventional method.
By experiment, part is permeated after detection in different phase to step 4 by above-mentioned steps 1, in the time that finished parts permeates detection, qualification rate has improved 12%.
Claims (4)
1. infiltration detection and the defect-restoration method therefor in titanium alloy casting processing, is characterized in that, concrete steps are:
Step 1, permeates and detects and repair the defect existing foundry goods; Described foundry goods permeated and detects and repair the process of defect existing and be:
A. foundry goods is permeated to detection, adopt conventional method, the foundry goods of casting forming is carried out to high temperature insostatic pressing (HIP), the temperature of high temperature insostatic pressing (HIP) is 900 DEG C-1100 DEG C; Adopt conventional method, the foundry goods through high temperature insostatic pressing (HIP) is permeated to detection;
B. to fault location, polishing is repaired; To the fault location pneumatic grinding wheel repairing of polishing of finding in detecting; Position after repairing is corroded;
C. infiltration detects and repairs the defect still existing for the second time; By after the foundry goods of local corrosion is rinsed well with clear water, again permeate detection after being placed in temperature and being the baking oven finish-drying of 120 DEG C-150 DEG C; If defect is not removed completely, rejected region is re-started to polishing as stated above and repair and corrode, carry out again permeating detection after Ultrasonic Cleaning;
D. vacuum heat; Before to foundry goods roughing, adopting conventional method is 1 × 10 to foundry goods in vacuum tightness
-2pa, temperature is to carry out vacuum heat in the vacuum drying oven of 450 DEG C;
E. infiltration detects and repairs the defect still existing for the third time; Foundry goods through vacuum heat is permeated to detection again; The defect polishing of finding during infiltration is detected is repaired, and the foundry goods after repairing is carried out after Ultrasonic Cleaning; Again test, to the fault location pneumatic grinding wheel repairing of polish of finding in detecting, and the position after repairing is corroded;
The foundry goods obtaining is carried out to roughing by the mode of machining, obtain half-finished parts;
Step 2, permeates and detects and repair the defect existing the half-finished parts after roughing; Described half-finished parts after roughing permeated and detects and repair the process of defect existing and be:
A. to the half-finished parts depollution after roughing; Adopt the mode of pickling to described half-finished parts depollution;
B. by after the half-finished parts of overpickling is rinsed well with clear water, be placed in temperature and be the baking oven finish-drying of 120 DEG C-150 DEG C, obtain the half-finished parts after depollution; Half-finished parts after depollution is welded, obtain semi-manufacture assembly;
Step 3, permeates and detects and repair the defect existing the semi-manufacture assembly obtaining after welding; The described process that the semi-manufacture assembly that obtains after welding permeate to the defect that detects and repair existence is:
A. the semi-manufacture assembly obtaining after welding is heat-treated according to conventional vacuum heat-treating method: be 1 × 10 in vacuum tightness
-2pa, temperature is to carry out vacuum heat in the vacuum drying oven of 450 DEG C, and adopts conventional method to permeate detection to the semi-manufacture assembly through vacuum heat; If still there is defect in semi-manufacture assembly, to rejected region by the polishing of defect described in step 1 repair procedures, to the repairing of polishing of semi-manufacture assembly, and again after Ultrasonic Cleaning, permeate detection;
B. the semi-manufacture assembly detecting by infiltration is carried out to finishing, obtain fabricated part;
Step 4, finally detects and repairs the defect existing to fabricated part; In the time that fabricated part is finally detected, employing method for suppersonic cleaning permeates detection to fabricated part after fabricated part is permeated to the pre-service detecting again; Find after defect, to rejected region polishing, fabricated part is carried out again permeating detection after Ultrasonic Cleaning.
2. infiltration detection and the defect-restoration method therefor in the processing of a kind of titanium alloy casting as claimed in claim 1, it is characterized in that, when titanium alloy workpiece is corroded, the mixed solution corrosion that the salpeter solution that the hydrofluoric acid solution that employing concentration is 45-55g/L and concentration are 180-220g/L forms 1 minute; The ratio of described hydrofluoric acid solution and salpeter solution is 1:1.
3. infiltration detection and the defect-restoration method therefor in the processing of a kind of titanium alloy casting as claimed in claim 1, it is characterized in that, when titanium alloy workpiece is carried out to Ultrasonic Cleaning, it is to clean 5 minutes by ultrasonic vibration in 5%～10% clean-out system that part is immersed in to concentration, and solution temperature is 60 DEG C-75 DEG C; Automatically washing 5 minutes, the hot water of putting into temperature and be 50 DEG C-60 DEG C soaks 10 minutes; It is dry 1 hour of the baking oven of 130 DEG C that part is placed in to temperature, the foundry goods that obtains detecting by infiltration.
4. infiltration detection and the defect-restoration method therefor in the processing of a kind of titanium alloy workpiece as claimed in claim 3, is characterized in that, the clean-out system of described Ultrasonic Cleaning is ARDROX6333A clean-out system.
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| US9651524B2 (en) * | 2013-05-31 | 2017-05-16 | Rti International Metals, Inc. | Method of ultrasonic inspection of as-cast titanium alloy articles |
| US9981349B2 (en) | 2013-05-31 | 2018-05-29 | Arconic Inc. | Titanium welding wire, ultrasonically inspectable welds and parts formed therefrom, and associated methods |
| US8991241B1 (en) * | 2013-10-30 | 2015-03-31 | General Electric Company | Gas turbine component monitoring |
| CN107063819A (en) * | 2017-06-28 | 2017-08-18 | 中国航发南方工业有限公司 | The preprocess method of titanium alloy casting fluoroscopic examination |
| CN111060670B (en) * | 2019-12-18 | 2022-06-10 | 江苏隆达超合金股份有限公司 | Method for detecting crack defects on inner surface of nickel-based alloy pierced billet by acid washing |
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Address after: 710021 Xu Jia Bay, Xi'an, Shaanxi, Beijiao Patentee after: AECC AVIATION POWER CO,LTD. Address before: 710021 Xu Jia Bay, Xi'an, Shaanxi, Beijiao Patentee before: AVIC AVIATION ENGINE Corp.,PLC Address after: 710021 Xu Jia Bay, Xi'an, Shaanxi, Beijiao Patentee after: AVIC AVIATION ENGINE Corp.,PLC Address before: 710021 Xu Jia Bay, Xi'an, Shaanxi, Beijiao Patentee before: XI'AN AVIATION POWER Co.,Ltd. |