CN106680059A - Method for inspecting macrostructures and defects of beta titanium alloy - Google Patents
Method for inspecting macrostructures and defects of beta titanium alloy Download PDFInfo
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- CN106680059A CN106680059A CN201611226837.3A CN201611226837A CN106680059A CN 106680059 A CN106680059 A CN 106680059A CN 201611226837 A CN201611226837 A CN 201611226837A CN 106680059 A CN106680059 A CN 106680059A
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- titanium alloy
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- inspection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/32—Polishing; Etching
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
- G01N2001/2866—Grinding or homogeneising
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating And Analyzing Materials By Characteristic Methods (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a method for inspecting macrostructures and defects of a beta titanium alloy, and belongs to the technical field of metal material inspection. The method comprises the following steps: performing surface machining on a sample to be detected to obtain certain surface roughness, corroding with mixed acid corrosive, quickly scouring off the corroding solution and corrosion products with water, cleaning, blow-drying, and inspecting macrostructures and defects on the surface of the sample. According to the invention, the macrostructures and defects shown on the surface of the component are observed after the sample is corroded through a specific corrosion method and is scoured, so that machining flow lines and possible macroscopic imperfections of the component can be visually observed. The method can be used in the fields of titanium alloy material inspection, material research, failure analysis and the like.
Description
Technical field
The invention belongs to metal material inspection technology field, and in particular to one kind inspection beta-titanium alloy macrostructure and defect
Method.
Technical background
Titanium or titanium alloy has intensity high, and density is little, and elastic modelling quantity is approximately the half of steel, and thermal coefficient of expansion is low, nonmagnetic,
Thermal conductivity is low, a series of advantage such as corrosion-resistant, environmentally safe so that titanium alloy be not only widely used in Aeronautics and Astronautics,
The fields such as naval vessel, weapons and chemical industry.The macrostructure observation of titanium and titanium alloy semi-finished product and part is its metallographic research
In must and the particularly important stage.The macrostructure observation of titanium and titanium alloy semi-finished product and part is to ensure that titanium alloy member is pacified
The importance for using entirely.
The sour corrosion test that the macrostructure of titanium or titanium alloy and fault detection are adopted is of macrographic test
Test method, due to the Area of Sample for macroscopic examination it is larger, operating technology and required inspection equipment it is relatively easy, energy
Enough quality for reflecting tested material or product comprehensively rapidly, therefore, sour corrosion test is metal material inspection, material scientific research life
The important means being generally used in the work such as product and failure analysis.
At present China is GB/T5168-2008 for the high-low time tissue of alpha-beta titanium alloy and the method for inspection of defect《α-β
The titanium alloy high-low time tissue method of inspection》.The method can verify the processing streamline of diphasic titanium alloy after deformation and biphase
Defect in titanium alloy finished product such as pore, crackle, be mingled with, be layered, segregation and open grain structure, exposure macroheterogeneity and determination
Its property.For the national standard of the observational technique without correlation of beta-titanium alloy macrostructure, most of scientific research and production unit root
It is observed according to the observational technique of diphasic titanium alloy macrostructure.To complete beta-titanium alloy using diphasic titanium alloy low power
Caustic solution is still able to observe that its macrostructure, for heat-treatable strengthened near β titanium alloy and metastable β Titanium-alloy are in corrosion
When macrostructure can because have substantial amounts of secondaryαphase be corroded produce black tissue, cause the macrostructure feature of titanium alloy
Cannot observe and determine.Find a kind of new titanium alloy macrostructure method of inspection, enable to beta-titanium alloy processing streamline and
Tissue defects can intuitively show extremely urgent.
The content of the invention
Deficiency of the present invention for the beta-titanium alloy macrostructure method of inspection, there is provided one kind inspection beta-titanium alloy macrostructure
And the method for defect, it is characterised in that the method is comprised the following steps：
(1) the position sampling processing for needing detection is selected, areal deformation area, heat affected area and greasy dirt is removed；
(2) prepare mixed acid caustic, in the mixed acid nitric acid volume fraction be 80-90%, hydrofluoric acid volume fraction
For 10-20%；
(3) sample for processing is put into etch 30-120s in mixed acid caustic, takes out and is washed away at a high speed with water rapidly, 10s
The interior etchant solution and corrosion product for removing specimen surface simultaneously clean is dried up, you can carry out the inspection of sample macrostructure and defect
Test.
Surface roughness in step (1) after sample processing is not more than 0.8 μm.
It is an advantage of the current invention that：With specific etch corrosion sample and after flushing, it is low that observation component surface shows
Again tissue and defect, can intuitively observe the processing streamline and gross imperfection that may be present of component, than adopting GB/
Method can more clearly from show the macrostructure and defect of beta-titanium alloy in T5168-2008.The method can be in titanium alloy
The examination of materials, the field such as material scientific research and failure analysis is applied.
Description of the drawings
Fig. 1 is Ti-15Mo-3Al-2.7Nb-0.25Si forging macrostructures；
Fig. 2 is Ti-6Cr-5Mo-5V-4Al forging macrostructures；
Fig. 3 is Ti-6Cr-5Mo-5V-4Al forging macrostructures；
Fig. 4 is the beta alloy forging macrostructure that GB/T5168-2008 methods are obtained.
Specific embodiment
The invention provides a kind of method of inspection beta-titanium alloy macrostructure and defect, with reference to embodiment to this
It is bright to be described further, but embodiment not limitation of the present invention.
Embodiment 1
Low power group is carried out Jing after fixation rates to the alloy forged piece after Ti-15Mo-3Al-2.7Nb-0.25Si forgings
Observation is knitted, the section to be observed is cut using the method for wire cutting, with 80# liquid honings the trace after the wire cutting of surface is fallen
Mark, respectively with 200#, 400#, 600#, 1500# waterproof abrasive paper removes surface scratch, and surface roughness is not more than 0.8 μm.Using change
The volume fraction for learning pure nitric acid is 90% and the volume fraction of chemical pure Fluohydric acid. is mixed with mixed acid caustic for 10%.Will
Mixed acid caustic is put in the plastic containers more than observation section and is corroded, and etching time is 120s, and corrosion is put after terminating
Corrosive liquid is removed in 5s in the water of flowing, macrostructure is observed, the macrostructure of the alloy is shown in Fig. 1, the low power group
Knit and can be used to the processing streamline clear for observing forging and manufacturing deficiency and determine its property.
Embodiment 2
Macrostructure observation is carried out Jing after fixation rates to the alloy forged piece after Ti-6Cr-5Mo-5V-4Al forgings,
The section to be observed is cut using the method for wire cutting, with 80# liquid honings the vestige after the wire cutting of surface is fallen, used respectively
200#, 400#, 600#, 1500# waterproof abrasive paper removes surface scratch, and surface roughness is not more than 0.8 μm.Using chemical pure nitric acid
Volume fraction is 85% and the volume fraction of chemical pure Fluohydric acid. is mixed with mixed acid caustic for 15%.Acid corrosion will be mixed
Agent is put in the plastic containers more than observation section is corroded, and etching time is 60s, and corrosion is put in the water of flowing after terminating
Corrosive liquid is removed in 8s, macrostructure is observed, the macrostructure of the alloy is shown in Fig. 2, and the macrostructure can be used to see
Examine the processing streamline clear and manufacturing deficiency of forging and determine its property.
Embodiment 3
Macrostructure sight is carried out Jing after fixation rates to the alloy forged piece after Ti-3.5Al-10Mo-8V-1Fe forgings
Examine, the section to be observed is cut using the method for wire cutting, with 80# liquid honings the vestige after the wire cutting of surface is fallen, point
Not Yong 200#, 400#, 600#, 1500# waterproof abrasive paper removes surface scratch, and surface roughness is not more than 0.8 μm.Using chemical pure nitre
The volume fraction of acid is 80% and the volume fraction of chemical pure Fluohydric acid. is mixed with mixed acid caustic for 20%.By mixed acid
Caustic is put in the plastic containers more than observation section and is corroded, and etching time is 30s, and corrosion is put in flowing after terminating
Corrosive liquid is removed in water in 10s, macrostructure is observed, the macrostructure of the alloy is shown in Fig. 3, and the macrostructure can be used
To observe the processing streamline clear and manufacturing deficiency of forging and determine its property.
The macrostructure for carrying out beta alloy forging when macrostructure is observed using the method for GB/T5168-2008 is shown in Fig. 4.
From the point of view of Fig. 4, the forging tissue macrostructure is black, and processing streamline and manufacturing deficiency are not readily observed, GB/T5168-
There is drawback in the method in 2008, the macrostructure observational technique in the present invention is with more novelty and practicality to beta alloy observation
Property.
Claims (2)
1. it is a kind of inspection beta-titanium alloy macrostructure and defect method, it is characterised in that the method is comprised the following steps：
(1) the position sampling for needing detection, processing is selected to remove areal deformation area, heat affected area and greasy dirt；
(2) mixed acid caustic is prepared, wherein, nitric acid volume fraction is 80-90% in mixed acid, and hydrofluoric acid volume fraction is
10-20%；
(3) sample that step (1) is processed is put into etch 30-120s in step (2) mixed acid caustic, takes out high with water rapidly
Speed is washed away, and the etchant solution and corrosion product of specimen surface is removed in 10s and clean is dried up, you can carry out sample macrostructure and
The inspection of defect.
2. according to claim 1 it is a kind of inspection beta-titanium alloy macrostructure and defect method, it is characterised in that step (1)
Surface roughness after middle sample processing is not more than 0.8 μm.
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| CN201611226837.3A CN106680059A (en) | 2016-12-27 | 2016-12-27 | Method for inspecting macrostructures and defects of beta titanium alloy |
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| CN201611226837.3A CN106680059A (en) | 2016-12-27 | 2016-12-27 | Method for inspecting macrostructures and defects of beta titanium alloy |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109238814A (en) * | 2018-11-09 | 2019-01-18 | 成都先进金属材料产业技术研究院有限公司 | The preparation method of high-strength and high ductility beta titanium alloy metallographic specimen |
| CN111041488A (en) * | 2019-12-19 | 2020-04-21 | 陕西宏远航空锻造有限责任公司 | Ultrahigh-strength and toughness titanium alloy macrostructure corrosive agent and corrosion method thereof |
| CN111289514A (en) * | 2020-03-16 | 2020-06-16 | 中国兵器科学研究院宁波分院 | Method for displaying aluminum alloy macroscopic crystal grains and streamline |
| 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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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109238814A (en) * | 2018-11-09 | 2019-01-18 | 成都先进金属材料产业技术研究院有限公司 | The preparation method of high-strength and high ductility beta titanium alloy metallographic specimen |
| CN111041488A (en) * | 2019-12-19 | 2020-04-21 | 陕西宏远航空锻造有限责任公司 | Ultrahigh-strength and toughness titanium alloy macrostructure corrosive agent and corrosion method thereof |
| CN111289514A (en) * | 2020-03-16 | 2020-06-16 | 中国兵器科学研究院宁波分院 | Method for displaying aluminum alloy macroscopic crystal grains and streamline |
| 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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