CN101782532B - Method for macro-etching detection of titanium alloy blade metallurgical quality - Google Patents
Method for macro-etching detection of titanium alloy blade metallurgical quality Download PDFInfo
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- CN101782532B CN101782532B CN2009100102288A CN200910010228A CN101782532B CN 101782532 B CN101782532 B CN 101782532B CN 2009100102288 A CN2009100102288 A CN 2009100102288A CN 200910010228 A CN200910010228 A CN 200910010228A CN 101782532 B CN101782532 B CN 101782532B
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Abstract
The invention relates to a method for macro-etching detection of titanium alloy blade metallurgical quality. The blade forming technological process includes rod extruding, heading, dummying, isothermal forming, isothermal correcting, heat treatment, machining and macro etching as well as vacuum heat treatment; macro etching bath solution includes 120Ml/L of HF(42%), 260Ml/L of HNO3(65-68%), 160Ml/L of H3PO4(85%) and 25g/L of urea, the balance water; uniform equiaxial alpha phase structure is taken as structure in ideal state, thus heterogeneous microstructures corresponding to macro topographies in different colour contrasts can damage the overall performance of blade more or less and can be determined according to structure type, location and region size thereof. The invention has the advantages that standard photograph is made to be used as basis for macro-etching detection, so as to save expense for blade dissection and shorten blade judging period; and meanwhile forging technical standard is complete, so that production efficiency is improved.
Description
Technical field
The present invention relates to the judgement field of metallurgical quality of titanium alloy blade, a kind of method of macro-etching detection of titanium alloy blade metallurgical quality is provided especially.
Background technology
Streamline be forging in forging process, metal material directivity deformation path be integrated into macro-etching the time the regular decorative pattern that shows.At present for titanium alloy blade streamline data seldom, streamline and microstructure, mechanical property, getting in touch of usability it be unclear that, and are blind areas for the reliability of engine, make analysis and judgement early and are necessary.
Summary of the invention
The objective of the invention is for the understanding early to the titanium alloy forging performance, the spy provides a kind of method of macro-etching detection of titanium alloy blade metallurgical quality.
The invention provides a kind of method of macro-etching detection of titanium alloy blade metallurgical quality; It is characterized in that: the method for described macro-etching detection of titanium alloy blade metallurgical quality comprises, in blade forming technology process, comprises: squeeze bar, heading, blocking, ausforming, isothermal correction, thermal treatment, machining, macro-etching; Vacuum heat: double annealing, 900 ℃～920 ℃ heating, insulation is calculated temperature retention time by the maximum cross-section; The applying argon gas cooling; 550 ℃～650 ℃ heating, insulation 4h～8h, applying argon gas cooling; Machining mode: digital control processing; The macro-etching tank liquor is: HF (42%) 120ML/L, HNO
3(65%～68%) 260ML/L, H
3PO
4(85%) 160ML/L, urea 25g/L, other is water;
If with axle α phase constitution such as uniform is the tissue of perfect condition; The pairing foreign peoples's microstructure of the low power pattern of different colours contrast more or less all can endanger the overall performance of blade so; Types of organization, location and area size according to them are judged; Harmfulness is followed successively by according to size order: the white dot pattern is lamella α phase constitution, more straight bright fringes pattern " Adiabatic Shear band "; Than normal wait axle α phase crystallite dimension little a α phase constitution and the current shape dark fringe patterns such as thin crystalline substance of Duoing; Wait the slightly little axle α phase constitutions such as thin crystalline substance of axle α phase crystallite dimension than normal, if preceding two kinds are organized in and are allowed in the blade, current shape dark fringe fine grained region is an acceptable so; Therefore, pass judgment on the existence whether focusing on of blade qualification allows lamella α phase constitution district and " Adiabatic Shear band " fine grained region.
The method of described macro-etching detection of titanium alloy blade metallurgical quality does, residual lamellar structure in the dead band then can fundamentally be avoided being out of shape if can original bar be changed into and wait a α phase constitution in (1); If original bar is a Widmannstatten structure, should increase final process redundancy simultaneously;
(2) during blocking, select suitable glass lubricant, with the cooling velocity that reduces blank surface with improve the upper and lower mould lubricating condition, the abundant instrument that directly contacts of preheating forging die, clamp etc. and blank; Increase the blocking work step, per step all clears up material surface again and is coated with lubricant;
(3) increase the work step of isothermal forging, per step all clears up material surface again and is coated with lubricant, because the lubricity that the area increase that blank contacts with mould descends, alleviates a α such as " Adiabatic Shear band " and current shape dark fringe fine grained region mutually to improve.
In the smithing technological parameter, squeeze bar, heading heating-up temperature: (T
β-55) ℃ ± 10 ℃, T wherein
βBe the transformation temperature of material, deflection is at 25%-50%; Forging surfaces coated glass lubricant, die surface spray colloidal graphite mixed with water; Blocking heating-up temperature: (T
β-35) ℃ ± 10 ℃, deflection is at 25%-50%; Forging surfaces coated glass lubricant, die surface spray colloidal graphite mixed with water; Isothermal forging is shaped: (T
β-65) ℃ ± 10 ℃, deflection is at 25%-50%, and mold temperature is with the isothermal forging heating-up temperature that is shaped, forging surfaces coated glass lubricant, die surface spray colloidal graphite mixed with water; Isothermal is proofreaied and correct: (T
β-75) ℃ ± 10 ℃, blade is carried out school shape, there is not distortion, mold temperature is proofreaied and correct heating-up temperature with isothermal, forging surfaces coated glass lubricant.
Sum up as follows:
(1) wide bright fringes is for waiting axle α phase constitution; Crystallite dimension is compared with normal equiaxed structure district and is wanted much little; Fine grained region is generally
shape or " X " shape face on the transverse section; Their end face shows as two stripe from the teeth outwards, therefore wide bright thin crystal bar line general paired appearance on the pelvic surface of sacrum and/or the back side;
(2) the low power shape characteristic is the leukasmus point-like of gathering, and the α phase nodularization in its microstructure is incomplete, in addition have exist lamellar structure and grain boundary mutually, this tissue is present in the surf zone of blade near axis mostly.
Take all factors into consideration the low power pattern and the microstructure of blade, cause that the uneven immediate cause of color contrast is the difference of microstructure and crystallite dimension behind the blade macro-etching, its basic reason is that the distortion of each position is inhomogeneous.The white dot district of blade near axis surf zone is main with lamellar structure; The bright fringes that occurs in pairs on the pelvic surface of sacrum is much little as to wait axle α fine grained regions mutually for compare crystallite dimension with normal equiaxed structure district, on the transverse section, is generally
shape or " X " shape face.Cause the reason of this Tissue distribution characteristics have following some:
(1) thermal conductivity of titanium alloy is relatively poor, so forging stock is come out of the stove, and afterwards surface cool is fast.As operate slowly, will cause bigger inside and outside temperature difference.In advance during die forging, blank and upper and lower mould contact portion temperature further reduction and friction force are bigger, have formed the stagnant zone, and the stagnant zone is difficult to avoid, and this is the main cause that there is lamellar structure in blade near axis surf zone;
(2) in advance during die forging; Material is in the easy deformation of maximum shear stress direction (being 45 ° of directions with pressure); Distortion makes temperatures at localized regions raise and has little time to be transmitted to other zone fast, and this makes this region deformation be more prone to again, and the two is mutually promoted; Make the regional area deflection increase greatly; Usually this zone is called as " Adiabatic Shear band ", is forging formation symmetrical " X " shape on the excellent xsect, and this is the main cause that forms
shape or the thin crystal zone of " X " shape; Single pass heavy deformation is big more, and this phenomenon is obvious more.
Advantage of the present invention:
The method of macro-etching detection of titanium alloy blade metallurgical quality of the present invention is through formulating normal pictures, as the foundation of macro-etching detection judgement; Thereby saved the expense that blade is dissected; Shortened the cycle that blade is judged, perfect simultaneously forging technical standard has improved production efficiency.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed explanation:
Fig. 1 is no tangible wire in surface or ribbon grain, and regional area has the blade surface picture of densely covered tiny white dot;
Fig. 2 has the straight ribbon grain of broad and the blade surface picture in the tiny white dot district of gathering for the surface.
Embodiment
Embodiment 1
Present embodiment provides a kind of method of macro-etching detection of titanium alloy blade metallurgical quality; It is characterized in that: the method for described macro-etching detection of titanium alloy blade metallurgical quality comprises, in blade forming technology process, comprises: squeeze bar, heading, blocking, ausforming, isothermal correction, thermal treatment, machining, macro-etching; Vacuum heat: double annealing, 900 ℃ of heating, insulation is calculated temperature retention time by the maximum cross-section; The applying argon gas cooling; 550 ℃ of heating, insulation 4h, applying argon gas cooling; Machining mode: digital control processing; The macro-etching tank liquor is: HF (42%) 120ML/L, HNO
3(65%～68%) 260ML/L, H
3PO
4(85%) 160ML/L, urea 25g/L, other is water;
If with axle α phase constitution such as uniform is the tissue of perfect condition; The pairing foreign peoples's microstructure of the low power pattern of different colours contrast more or less all can endanger the overall performance of blade so; Types of organization, location and area size according to them are judged; Harmfulness is followed successively by according to size order: the white dot pattern is lamella α phase constitution, more straight bright fringes pattern " Adiabatic Shear band "; Than normal wait axle α phase crystallite dimension little a α phase constitution and the current shape dark fringe patterns such as thin crystalline substance of Duoing; Wait the slightly little axle α phase constitutions such as thin crystalline substance of axle α phase crystallite dimension than normal, if preceding two kinds are organized in and are allowed in the blade, current shape dark fringe fine grained region is an acceptable so; Therefore, pass judgment on the existence whether focusing on of blade qualification allows lamella α phase constitution district and " Adiabatic Shear band " fine grained region.
The method of described macro-etching detection of titanium alloy blade metallurgical quality does, residual lamellar structure in the dead band then can fundamentally be avoided being out of shape if can original bar be changed into and wait a α phase constitution in (1); If original bar is a Widmannstatten structure, should increase final process redundancy simultaneously;
(2) during blocking, select suitable glass lubricant, with the cooling velocity that reduces blank surface with improve the upper and lower mould lubricating condition, the abundant instrument that directly contacts of preheating forging die, clamp etc. and blank; Increase the blocking work step, per step all clears up material surface again and is coated with lubricant;
(3) increase the work step of isothermal forging, per step all clears up material surface again and is coated with lubricant, because the lubricity that the area increase that blank contacts with mould descends, alleviates a α such as " Adiabatic Shear band " and current shape dark fringe fine grained region mutually to improve.
In the smithing technological parameter, squeeze bar, heading heating-up temperature: (T
β-55) ℃ ± 10 ℃, T wherein
βBe the transformation temperature of material, deflection is at 25%-50%; Forging surfaces coated glass lubricant, die surface spray colloidal graphite mixed with water; Blocking heating-up temperature: (T
β-35) ℃ ± 10 ℃, deflection is at 25%-50%; Forging surfaces coated glass lubricant, die surface spray colloidal graphite mixed with water; Isothermal forging is shaped: (T
β-65) ℃ ± 10 ℃, deflection is at 25%-50%, and mold temperature is with the isothermal forging heating-up temperature that is shaped, forging surfaces coated glass lubricant, die surface spray colloidal graphite mixed with water; Isothermal is proofreaied and correct: (T
β-75) ℃ ± 10 ℃, blade is carried out school shape, there is not distortion, mold temperature is proofreaied and correct heating-up temperature with isothermal, forging surfaces coated glass lubricant.
Sum up as follows:
(1) wide bright fringes is for waiting axle α phase constitution; Crystallite dimension is compared with normal equiaxed structure district and is wanted much little; Fine grained region is generally
shape or " X " shape face on the transverse section; Their end face shows as two stripe from the teeth outwards, therefore wide bright thin crystal bar line general paired appearance on the pelvic surface of sacrum and/or the back side;
(2) the low power shape characteristic is the leukasmus point-like of gathering, and the α phase nodularization in its microstructure is incomplete, in addition have exist lamellar structure and grain boundary mutually, this tissue is present in the surf zone of blade near axis mostly.
Take all factors into consideration the low power pattern and the microstructure of blade, cause that the uneven immediate cause of color contrast is the difference of microstructure and crystallite dimension behind the blade macro-etching, its basic reason is that the distortion of each position is inhomogeneous.The white dot district of blade near axis surf zone is main with lamellar structure; The bright fringes that occurs in pairs on the pelvic surface of sacrum is much little as to wait axle α fine grained regions mutually for compare crystallite dimension with normal equiaxed structure district, on the transverse section, is generally
shape or " X " shape face.Cause the reason of this Tissue distribution characteristics have following some:
(1) thermal conductivity of titanium alloy is relatively poor, so forging stock is come out of the stove, and afterwards surface cool is fast.As operate slowly, will cause bigger inside and outside temperature difference.In advance during die forging, blank and upper and lower mould contact portion temperature further reduction and friction force are bigger, have formed the stagnant zone, and the stagnant zone is difficult to avoid, and this is the main cause that there is lamellar structure in blade near axis surf zone;
(2) in advance during die forging; Material is in the easy deformation of maximum shear stress direction (being 45 ° of directions with pressure); Distortion makes temperatures at localized regions raise and has little time to be transmitted to other zone fast, and this makes this region deformation be more prone to again, and the two is mutually promoted; Make the regional area deflection increase greatly; Usually this zone is called as " Adiabatic Shear band ", is forging formation symmetrical " X " shape on the excellent xsect, and this is the main cause that forms
shape or the thin crystal zone of " X " shape; Single pass heavy deformation is big more, and this phenomenon is obvious more.
Embodiment 2
Present embodiment provides a kind of method of macro-etching detection of titanium alloy blade metallurgical quality; It is characterized in that: the method for described macro-etching detection of titanium alloy blade metallurgical quality comprises, in blade forming technology process, comprises: squeeze bar, heading, blocking, ausforming, isothermal correction, thermal treatment, machining, macro-etching; Vacuum heat: double annealing, 920 ℃ of heating, insulation is calculated temperature retention time by the maximum cross-section; The applying argon gas cooling; 650 ℃ of heating, insulation 8h, applying argon gas cooling; Machining mode: digital control processing; The macro-etching tank liquor is: HF (42%) 120ML/L, HNO
3(65%～68%) 260ML/L, H
3PO
4(85%) 160ML/L, urea 25g/L, other is water;
If with axle α phase constitution such as uniform is the tissue of perfect condition; The pairing foreign peoples's microstructure of the low power pattern of different colours contrast more or less all can endanger the overall performance of blade so; Types of organization, location and area size according to them are judged; Harmfulness is followed successively by according to size order: the white dot pattern is lamella α phase constitution, more straight bright fringes pattern " Adiabatic Shear band "; Than normal wait axle α phase crystallite dimension little a α phase constitution and the current shape dark fringe patterns such as thin crystalline substance of Duoing; Wait the slightly little axle α phase constitutions such as thin crystalline substance of axle α phase crystallite dimension than normal, if preceding two kinds are organized in and are allowed in the blade, current shape dark fringe fine grained region is an acceptable so; Therefore, pass judgment on the existence whether focusing on of blade qualification allows lamella α phase constitution district and " Adiabatic Shear band " fine grained region.
The method of described macro-etching detection of titanium alloy blade metallurgical quality does, residual lamellar structure in the dead band then can fundamentally be avoided being out of shape if can original bar be changed into and wait a α phase constitution in (1); If original bar is a Widmannstatten structure, should increase final process redundancy simultaneously;
(2) during blocking, select suitable glass lubricant, with the cooling velocity that reduces blank surface with improve the upper and lower mould lubricating condition, the abundant instrument that directly contacts of preheating forging die, clamp etc. and blank; Increase the blocking work step, per step all clears up material surface again and is coated with lubricant;
(3) increase the work step of isothermal forging, per step all clears up material surface again and is coated with lubricant, because the lubricity that the area increase that blank contacts with mould descends, alleviates a α such as " Adiabatic Shear band " and current shape dark fringe fine grained region mutually to improve.
In the smithing technological parameter, squeeze bar, heading heating-up temperature: (T
β-55) ℃ ± 10 ℃, T wherein
βBe the transformation temperature of material, deflection is at 25%-50%; Forging surfaces coated glass lubricant, die surface spray colloidal graphite mixed with water; Blocking heating-up temperature: (T
β-35) ℃ ± 10 ℃, deflection is at 25%-50%; Forging surfaces coated glass lubricant, die surface spray colloidal graphite mixed with water; Isothermal forging is shaped: (T
β-65) ℃ ± 10 ℃, deflection is at 25%-50%, and mold temperature is with the isothermal forging heating-up temperature that is shaped, forging surfaces coated glass lubricant, die surface spray colloidal graphite mixed with water; Isothermal is proofreaied and correct: (T
β-75) ℃ ± 10 ℃, blade is carried out school shape, there is not distortion, mold temperature is proofreaied and correct heating-up temperature with isothermal, forging surfaces coated glass lubricant.
Sum up as follows:
(1) wide bright fringes is for waiting axle α phase constitution; Crystallite dimension is compared with normal equiaxed structure district and is wanted much little; Fine grained region is generally
shape or " X " shape face on the transverse section; Their end face shows as two stripe from the teeth outwards, therefore wide bright thin crystal bar line general paired appearance on the pelvic surface of sacrum and/or the back side;
(2) the low power shape characteristic is the leukasmus point-like of gathering, and the α phase nodularization in its microstructure is incomplete, in addition have exist lamellar structure and grain boundary mutually, this tissue is present in the surf zone of blade near axis mostly.
Take all factors into consideration the low power pattern and the microstructure of blade, cause that the uneven immediate cause of color contrast is the difference of microstructure and crystallite dimension behind the blade macro-etching, its basic reason is that the distortion of each position is inhomogeneous.The white dot district of blade near axis surf zone is main with lamellar structure; The bright fringes that occurs in pairs on the pelvic surface of sacrum is much little as to wait axle α fine grained regions mutually for compare crystallite dimension with normal equiaxed structure district, on the transverse section, is generally
shape or " X " shape face.Cause the reason of this Tissue distribution characteristics have following some:
(1) thermal conductivity of titanium alloy is relatively poor, so forging stock is come out of the stove, and afterwards surface cool is fast.As operate slowly, will cause bigger inside and outside temperature difference.In advance during die forging, blank and upper and lower mould contact portion temperature further reduction and friction force are bigger, have formed the stagnant zone, and the stagnant zone is difficult to avoid, and this is the main cause that there is lamellar structure in blade near axis surf zone;
(2) in advance during die forging; Material is in the easy deformation of maximum shear stress direction (being 45 ° of directions with pressure); Distortion makes temperatures at localized regions raise and has little time to be transmitted to other zone fast, and this makes this region deformation be more prone to again, and the two is mutually promoted; Make the regional area deflection increase greatly; Usually this zone is called as " Adiabatic Shear band ", is forging formation symmetrical " X " shape on the excellent xsect, and this is the main cause that forms
shape or the thin crystal zone of " X " shape; Single pass heavy deformation is big more, and this phenomenon is obvious more.
Embodiment 3
Present embodiment provides a kind of method of macro-etching detection of titanium alloy blade metallurgical quality; It is characterized in that: the method for described macro-etching detection of titanium alloy blade metallurgical quality comprises, in blade forming technology process, comprises: squeeze bar, heading, blocking, ausforming, isothermal correction, thermal treatment, machining, macro-etching; Vacuum heat: double annealing, 910 ℃ of heating, insulation is calculated temperature retention time by the maximum cross-section; The applying argon gas cooling; 600 ℃ of heating, insulation 6h, applying argon gas cooling; Machining mode: digital control processing; The macro-etching tank liquor is: HF (42%) 120ML/L, HNO
3(65%～68%) 260ML/L, H
3PO
4(85%) 160ML/L, urea 25g/L, other is water;
If with axle α phase constitution such as uniform is the tissue of perfect condition; The pairing foreign peoples's microstructure of the low power pattern of different colours contrast more or less all can endanger the overall performance of blade so; Types of organization, location and area size according to them are judged; Harmfulness is followed successively by according to size order: the white dot pattern is lamella α phase constitution, more straight bright fringes pattern " Adiabatic Shear band "; Than normal wait axle α phase crystallite dimension little a α phase constitution and the current shape dark fringe patterns such as thin crystalline substance of Duoing; Wait the slightly little axle α phase constitutions such as thin crystalline substance of axle α phase crystallite dimension than normal, if preceding two kinds are organized in and are allowed in the blade, current shape dark fringe fine grained region is an acceptable so; Therefore, pass judgment on the existence whether focusing on of blade qualification allows lamella α phase constitution district and " Adiabatic Shear band " fine grained region.
The method of described macro-etching detection of titanium alloy blade metallurgical quality does, residual lamellar structure in the dead band then can fundamentally be avoided being out of shape if can original bar be changed into and wait a α phase constitution in (1); If original bar is a Widmannstatten structure, should increase final process redundancy simultaneously;
(2) during blocking, select suitable glass lubricant, with the cooling velocity that reduces blank surface with improve the upper and lower mould lubricating condition, the abundant instrument that directly contacts of preheating forging die, clamp etc. and blank; Increase the blocking work step, per step all clears up material surface again and is coated with lubricant;
(3) increase the work step of isothermal forging, per step all clears up material surface again and is coated with lubricant, because the lubricity that the area increase that blank contacts with mould descends, alleviates a α such as " Adiabatic Shear band " and current shape dark fringe fine grained region mutually to improve.
In the smithing technological parameter, squeeze bar, heading heating-up temperature: (T
β-55) ℃ ± 10 ℃, T wherein
βBe the transformation temperature of material, deflection is at 25%-50%; Forging surfaces coated glass lubricant, die surface spray colloidal graphite mixed with water; Blocking heating-up temperature: (T
β-35) ℃ ± 10 ℃, deflection is at 25%-50%; Forging surfaces coated glass lubricant, die surface spray colloidal graphite mixed with water; Isothermal forging is shaped: (T
β-65) ℃ ± 10 ℃, deflection is at 25%-50%, and mold temperature is with the isothermal forging heating-up temperature that is shaped, forging surfaces coated glass lubricant, die surface spray colloidal graphite mixed with water; Isothermal is proofreaied and correct: (T
β-75) ℃ ± 10 ℃, blade is carried out school shape, there is not distortion, mold temperature is proofreaied and correct heating-up temperature with isothermal, forging surfaces coated glass lubricant.
Sum up as follows:
(1) wide bright fringes is for waiting axle α phase constitution; Crystallite dimension is compared with normal equiaxed structure district and is wanted much little; Fine grained region is generally
shape or " X " shape face on the transverse section; Their end face shows as two stripe from the teeth outwards, therefore wide bright thin crystal bar line general paired appearance on the pelvic surface of sacrum and/or the back side;
(2) the low power shape characteristic is the leukasmus point-like of gathering, and the α phase nodularization in its microstructure is incomplete, in addition have exist lamellar structure and grain boundary mutually, this tissue is present in the surf zone of blade near axis mostly.
Take all factors into consideration the low power pattern and the microstructure of blade, cause that the uneven immediate cause of color contrast is the difference of microstructure and crystallite dimension behind the blade macro-etching, its basic reason is that the distortion of each position is inhomogeneous.The white dot district of blade near axis surf zone is main with lamellar structure; The bright fringes that occurs in pairs on the pelvic surface of sacrum is much little as to wait axle α fine grained regions mutually for compare crystallite dimension with normal equiaxed structure district, on the transverse section, is generally
shape or " X " shape face.Cause the reason of this Tissue distribution characteristics have following some:
(1) thermal conductivity of titanium alloy is relatively poor, so forging stock is come out of the stove, and afterwards surface cool is fast.As operate slowly, will cause bigger inside and outside temperature difference.In advance during die forging, blank and upper and lower mould contact portion temperature further reduction and friction force are bigger, have formed the stagnant zone, and the stagnant zone is difficult to avoid, and this is the main cause that there is lamellar structure in blade near axis surf zone;
(2) in advance during die forging; Material is in the easy deformation of maximum shear stress direction (being 45 ° of directions with pressure); Distortion makes temperatures at localized regions raise and has little time to be transmitted to other zone fast, and this makes this region deformation be more prone to again, and the two is mutually promoted; Make the regional area deflection increase greatly; Usually this zone is called as " Adiabatic Shear band ", is forging formation symmetrical " X " shape on the excellent xsect, and this is the main cause that forms
shape or the thin crystal zone of " X " shape; Single pass heavy deformation is big more, and this phenomenon is obvious more.
Claims (3)
1. the method for a macro-etching detection of titanium alloy blade metallurgical quality; It is characterized in that: the method for described macro-etching detection of titanium alloy blade metallurgical quality comprises, in blade forming technology process, comprises: squeeze bar, heading, blocking, ausforming, isothermal correction, thermal treatment, machining, macro-etching; Vacuum heat: double annealing, 900 ℃～920 ℃ heating, insulation is calculated temperature retention time by the maximum cross-section; The applying argon gas cooling; 550 ℃～650 ℃ heating, insulation 4h～8h, applying argon gas cooling; Machining mode: digital control processing; The macro-etching tank liquor is: concentration is that 42% HF120ML/L, concentration are 65%～68% HNO
3260ML/L, concentration are 85% H
3PO
4160ML/L, urea 25g/L, other is water;
With axle α phase constitution such as uniform is the tissue of perfect condition; The pairing foreign peoples's microstructure of the low power pattern of different colours contrast can endanger the overall performance of blade; Types of organization, location and area size according to them judge that harmfulness according to magnitude relationship is: the white dot pattern is lamella α phase constitution＞more straight normal little axle α phase constitution and current shape dark fringe pattern such as thin crystalline substance of axle α phase crystallite dimension that wait of bright fringes pattern " Adiabatic Shear band "＞ratio.
2. according to the method for the described macro-etching detection of titanium alloy blade metallurgical quality of claim 1, it is characterized in that: the method for described macro-etching detection of titanium alloy blade metallurgical quality does,
(1) if can original bar be changed into and wait a α phase constitution, then can fundamentally avoid being out of shape residual lamellar structure in the dead band; If original bar is a Widmannstatten structure, should increase final process redundancy simultaneously;
(2) during blocking, select suitable glass lubricant, with the cooling velocity that reduces blank surface with improve upper and lower mould lubricating condition, preheating forging die, clamp; Increase the blocking work step, per step all clears up material surface again and is coated with lubricant;
(3) increase the work step of isothermal forging, per step all clears up material surface again and is coated with lubricant, because the lubricity that the area increase that blank contacts with mould descends, alleviates a α such as " Adiabatic Shear band " and current shape dark fringe fine grained region mutually to improve.
3. according to the method for the described macro-etching detection of titanium alloy blade metallurgical quality of claim 1, it is characterized in that: in the smithing technological parameter, squeeze bar, heading heating-up temperature: (T
β-55) ℃ ± 10 ℃, T wherein
βBe the transformation temperature of material, deflection is at 25%-50%; Forging surfaces coated glass lubricant, die surface spray colloidal graphite mixed with water; Blocking heating-up temperature: (T
β-35) ℃ ± 10 ℃, deflection is at 25%-50%; Forging surfaces coated glass lubricant, die surface spray colloidal graphite mixed with water; Isothermal forging shaping heating-up temperature: (T
β-65) ℃ ± 10 ℃, deflection is at 25%-50%, and mold temperature is with the isothermal forging heating-up temperature that is shaped, forging surfaces coated glass lubricant, die surface spray colloidal graphite mixed with water; Isothermal Tc: (T
β-75) ℃ ± 10 ℃, blade is carried out school shape, there is not distortion, mold temperature is proofreaied and correct heating-up temperature with isothermal, forging surfaces coated glass lubricant.
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| CN114112606A (en) * | 2021-11-08 | 2022-03-01 | 陕西飞机工业有限责任公司 | Preparation method of titanium alloy bolt head crystal grain streamline sample |
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| CN1932058A (en) * | 2006-07-27 | 2007-03-21 | 昆明冶金研究院 | Beta titanium alloy product and its smelting process and heat treatment process |
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|---|---|---|---|---|
| CN1932058A (en) * | 2006-07-27 | 2007-03-21 | 昆明冶金研究院 | Beta titanium alloy product and its smelting process and heat treatment process |
Non-Patent Citations (2)
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| JP特开2002-20849A 2002.01.23 |
| JP特开平8-81746A 1996.03.26 |
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Address after: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee after: Chinese Hangfa Shenyang Liming Aero engine limited liability company Address before: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee before: Liming Aeroplane Engine (Group) Co., Ltd., Shenyang City |