CN106645008A - New surface layer oxygen, nitrogen and hydrogen element detecting method in high-temperature alloy material high-speed fine processing - Google Patents
New surface layer oxygen, nitrogen and hydrogen element detecting method in high-temperature alloy material high-speed fine processing Download PDFInfo
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- CN106645008A CN106645008A CN201710109073.8A CN201710109073A CN106645008A CN 106645008 A CN106645008 A CN 106645008A CN 201710109073 A CN201710109073 A CN 201710109073A CN 106645008 A CN106645008 A CN 106645008A
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- temperature alloy
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 112
- 239000000956 alloy Substances 0.000 title claims abstract description 66
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 56
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 239000001301 oxygen Substances 0.000 title claims abstract description 53
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000012545 processing Methods 0.000 title claims abstract description 19
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title abstract description 16
- 239000001257 hydrogen Substances 0.000 title abstract description 16
- 229910052739 hydrogen Inorganic materials 0.000 title abstract description 16
- 239000002344 surface layer Substances 0.000 title abstract 4
- 238000001514 detection method Methods 0.000 claims abstract description 67
- 238000000611 regression analysis Methods 0.000 claims abstract description 12
- 238000005538 encapsulation Methods 0.000 claims abstract description 4
- YZCKVEUIGOORGS-IGMARMGPSA-N Protium Chemical compound [1H] YZCKVEUIGOORGS-IGMARMGPSA-N 0.000 claims description 42
- 241000720974 Protium Species 0.000 claims description 42
- 238000003754 machining Methods 0.000 claims description 41
- 238000009472 formulation Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 3
- 230000027734 detection of oxygen Effects 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 12
- 238000007689 inspection Methods 0.000 abstract description 4
- 229910045601 alloy Inorganic materials 0.000 description 21
- 238000012360 testing method Methods 0.000 description 15
- 239000000463 material Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 230000032683 aging Effects 0.000 description 5
- 230000001419 dependent effect Effects 0.000 description 5
- 238000003908 quality control method Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003801 milling Methods 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 241001062472 Stokellia anisodon Species 0.000 description 1
- OLBVUFHMDRJKTK-UHFFFAOYSA-N [N].[O] Chemical compound [N].[O] OLBVUFHMDRJKTK-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 239000002173 cutting fluid Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000013100 final test Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000010275 isothermal forging Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000012417 linear regression Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3563—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing solids; Preparation of samples therefor
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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
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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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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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- G01N2001/2873—Cutting or cleaving
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- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3563—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing solids; Preparation of samples therefor
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Abstract
The invention relates to a new surface layer oxygen, nitrogen and hydrogen element detecting method in high-temperature alloy material high-speed fine processing. The method comprises the following steps that 1, a high-speed fine processing process and the detection frequency of a part made of high-temperature alloy materials are made; in the high-speed fine processing process, a new surface layer is generated on the part along with the gradual peeling off of cut scraps; the cut scraps peeled off from the part are used as detecting samples; 2, the part is processed according to the process requirements; the cutting scraps peeled in the processing process are used as the detecting samples to be collected at the made detection frequency; the collected detecting samples are subjected to encapsulation and inspection; 3, each detecting sample is subjected to oxygen, nitrogen and hydrogen element content detection by an infrared-thermal conductivity combination method; 4, the oxygen, nitrogen and hydrogen element content data, detected by a regression analysis method, of each detecting sample is comprehensively analyzed and processed; the comprehensive and integral oxygen, nitrogen and hydrogen element content data of the detecting samples is obtained; further, the oxygen, nitrogen and hydrogen element content data of the new surface layer of the part is obtained.
Description
Technical field
The present invention relates to the detection method of material surface quality, new in specifically a kind of high-temperature alloy material High speed finish machining
Top layer oxygen, nitrogen, protium detection method.
Background technology
High-temperature alloy material refers to the high-temperature metal material of long service more than 600～1200 DEG C and under certain stress condition
Material, it has the combination properties such as excellent elevated temperature strength, non-oxidizability, corrosion and heat resistant, fatigue behaviour and fracture toughness, into
For military, civilian gas-turbine unit (such as aero-engine) the irreplaceable critical material of hot junction part.Due to combustion gas whirlpool
Turbine application high temperature alloy part for a long time 600～1200 DEG C high temperature and complex stress environment under be on active service, its work
Inclement condition, thus it is high to the reliability requirement of its work, its every physical-mechanical properties is required very strict.
In general, in order that high temperature alloy part disclosure satisfy that technical requirements, using finish forge, whole more than high temperature alloy part
The near-net-shape methods such as body essence casting, monocrystalline essence casting, isothermal forging, high temperature insostatic pressing (HIP) or powder metallurgy process are fabricated by blank, high
Temperature alloy blank must it is machined after can finished product, the machining of high temperature alloy blank is that High speed finish machining is processed.High temperature
Alloy part, because of violent plastic deformation and strong friction, can produce substantial amounts of heat in metal cutting, in addition high temperature in machining
The thermal conductivity factor of alloy material is natively very low, so as to raise easily the cutting temperature in narrow and small cutting zone, reaches as high as
1000℃.Under such hot environment, the element such as oxygen, nitrogen, hydrogen in surrounding medium is just easy to invade high temperature alloy zero
(cutting interface is the release surface of part and chip, and release surface makes part and chip generate new table respectively at the cutting interface of part
Layer) in, so that the new top layer of tool surface, part in cutting zone generates respectively alternate brittlement phase, alternate brittlement phase will add
Acute materials microstructure stress concentration, not only can induce cutter crack, the phenomenon of even tipping, but also high temperature can be deteriorated
The mechanical behavior under high temperature and resistance to corrosion of alloy part.
As can be seen here, oxygen, nitrogen, the content of protium in high-temperature alloy material how is controlled, direct relation high temperature conjunction
The processing technology and mechanical property of golden material.At present, to the content control of oxygen, nitrogen, protium in high-temperature alloy material, mainly
Smelt in high-temperature alloy material or cast sections reduce what is realized by means such as strict screening raw material, raising vacuums,
The oxygen in high-temperature alloy material, nitrogen, the content of protium is set to be reduced to acceptable level.However, oxygen in high-temperature alloy material,
The content control mode of nitrogen, protium, it is impossible to suitable for oxygen, nitrogen, the hydrogen on the new surface of high-temperature alloy material after High speed finish machining
The content control of element, this is because：The residual gas such as oxygen, nitrogen, hydrogen in high-temperature alloy material as harmful element, itself and height
Main intensified element (such as Cr, Al, Ti and Nb element) in temperature alloy material has very strong affinity, in processing environment
Oxygen, nitrogen, protium are invaded in the new top layer of high-temperature alloy material easily during High speed finish machining, removal residual gas nitrogen,
Oxygen, hydrogen are by no means easy, and this is also at present not by oxygen, nitrogen, the protium on the new top layer of high-temperature alloy material Jing after High speed finish machining
Content, be located the reason for bring within high-temperature alloy material quality control on the surface category.
If by the oxygen on the new top layer of high-temperature alloy material Jing after High speed finish machining, nitrogen, protium content, bring high temperature into
Within the control category of alloy material surface quality, then need to be related to contain the oxygen in high-temperature alloy material, nitrogen, protium
Amount is detected that then the control program according to testing result formulation to processing environment, finally realizes high-temperature alloy material surface
Nitrogen, oxygen, protium content control, that is, realize the control of high-temperature alloy material surface quality.
At present, in high-temperature alloy material oxygen, nitrogen, the detection of protium content are mainly with infrared-thermal conductivity combination method reality
Existing.The operation principle of infrared-thermal conductivity combination method is substantially：The detection sample of one known weight is placed on into graphite crucible
In, then melting in electrode furnace under helium protection, oxygen is reduced by carbon, with CO and CO2Form release, helium carrier gas will discharge
After the oxidized copper stove of analysis gas out, mass flow controller is flowed through, stably enter various detection cells；Rare-earth oxidation copper
CO is converted into CO2, infrared detector quantitative determination CO2Content；Nitrogen is decomposed and with N2Form release, by thermal conductivity detector
Detection；Hydrogen is thermal decomposited and with H2Form discharges, and through hot rare-earth oxidation copper H is oxidized to2O, steam is examined by special infrared detection pond
Survey, after change into hydrogen content.Infrared-thermal conductivity the combination method has that test limit is low, sensitivity is high, good stability, the spy such as can trace to the source
Point, and fully achieve automation and cause detection speed fast, disclosure satisfy that the quality inspection in actual production is ageing and want
Ask.
However, infrared-thermal conductivity combination method detects that the specification requirement of sample is higher to censorship, the generally indicated weight of precision processing
For the cylinder of 1g.If the high temperature alloy part at a high speed or after ultrahigh speed finishing is made standard detection sample, need to carry out
All multiple operation such as wire cutting, polishing, cleaning, its time cycle is long, can not meet the ageing requirement of actual production；In addition, plus
Oxygen, nitrogen, the protium invaded in work environment is mainly enriched in the new top layer of high temperature alloy part, and Dispersed precipitate is not closed in high temperature
The inside of metal parts, if high temperature alloy part is fabricated into the detection sample of standard, can be such that final testing result seriously loses
Very.
The content of the invention
The present invention technical purpose be：For above-mentioned the deficiencies in the prior art, there is provided a kind of easily operation, simple side
Just, detection cycle is short, new top layer oxygen in ageing good, the high-temperature alloy material High speed finish machining that the testing result degree of accuracy is high, nitrogen,
The method for quick of protium.
The mentality of designing of the present invention is mainly：The forming process on part machined surface-i.e. new top layer is exactly in fact chip
With the separation process of part base solid, when high-temperature alloy material carries out High speed finish machining cutting, oxygen, nitrogen in processing environment, hydrogen
Element is invaded in the release surface (i.e. their respective new top layer) of high temperature alloy part and chip simultaneously, therefore, the new table of chip
Layer in oxygen, nitrogen, protium content in theory with the new top layer of high temperature alloy part in oxygen, nitrogen, protium content be
Identical；And, high temperature alloy part when carrying out High speed finish machining and cutting, the cutting depth of employing be it is smaller, so
The thickness of the chip of formation is than relatively thin, so it is to be understood that oxygen, nitrogen, the hydrogen on the new top layer of chip are more inside chip
Dissipate distribution, that is, the newly Dispersed precipitate of the oxygen on top layer, nitrogen, hydrogen in high temperature alloy inside parts；It is described before comprehensive, the present invention with point
From the chip on high temperature alloy part as detection sample, the new table generated in high-temperature alloy material Jing High speed finish machinings is realized
Layer in oxygen, nitrogen, protium content it is timely, quickly and accurately detect.
The present invention realizes that the technical scheme that its technical purpose is adopted is, new in a kind of high-temperature alloy material High speed finish machining
Top layer oxygen, nitrogen, protium detection method, comprise the following steps：
Step 1. formulates the part of high-temperature alloy material High speed finish machining technique and detection frequency；In High speed finish machining mistake
New top layer can be generated with the phased separation of chip in journey on part, to peel off the chip in part as detection sample；
Step 2. carries out High speed finish machining to part according to the technological requirement formulated, and with the detection frequency of formulation at a high speed
The chip peeled off in finishing passes is collected as detection sample, by the encapsulation of each detection sample, the censorship collected；
Step 3. carries out respectively the content detection of oxygen, nitrogen, protium with infrared-thermal conductivity combination method to each detection sample；
The oxygen of each detection sample of the step 4. with regression analysis to detecting, nitrogen, the content data of protium carry out comprehensive
Analyzing and processing is closed, obtains detecting sample comprehensive overall oxygen, nitrogen, the content data of protium, and then obtain high-temperature alloy material
Oxygen, nitrogen, the content data of protium on part new top layer in High speed finish machining；The analyzing and processing of the regression analysis is calculated
Model is：
Y=β0+β1x1+β2x2+...+βmxm+ε；
In formula, y is the comprehensive overall content data of variable-corresponding element；
x1、x2、...、xmFor the technological parameter of independent variable-High speed finish machining；
β0、β1、β2、...、βmFor regression coefficient；
ε is accidental error.
Preferably, detection frequency >=3 time formulated in step 1.The quality of the detection sample collected in step 2 >=
1g。
The method have the benefit that：
Above-mentioned detection method for oxygen of the high-temperature alloy material generated in High speed finish machining process in new top layer, nitrogen,
The content detection of protium and propose, it is located away from the chip of high temperature alloy part using under High speed finish machining as infrared-thermal conductivity
The detection sample of combination method, the detection sample can not only really react oxygen, nitrogen, the protium on the new top layer of high-temperature alloy material
Content data, and the shaping of the detection sample can significantly shorten the sample preparation time, so not only effectively reduce sample preparation into
This, and ageing requirement when meeting actual production to quality control；
Meanwhile, above-mentioned detection method carries out synthesis to the detection data obtained in detection sample with corresponding regression analysis
Analyzing and processing, so as to comprehensive, stable, the accurately and reliably new top layer of acquisition high-temperature alloy material oxygen, nitrogen, protium content
Data, the testing result degree of accuracy is high, and authenticity is good；
In sum, the present invention has that easily operation, simple and convenient, detection cycle be short, ageing good, testing result is accurate
Degree height, good economy performance, it is reliable and practical the features such as；In addition, the high temperature after High speed finish machining can be closed by above-mentioned detection method
The oxygen on the new top layer of golden material, nitrogen, the content of protium are brought within the quality control on the surface category of high-temperature alloy material, so as to
The extension realized from top layer internally is paid close attention to high-temperature alloy material surface quality, while to other materials under high-temperature long life
Quality control on the surface there is directive property meaning.
Description of the drawings
Fig. 1 is the FB(flow block) of the present invention.
Fig. 2 is the design of part schematic diagram that the present invention is applied to test example.
Fig. 3 is the side view of Fig. 2.
Specific embodiment
The present invention is high-temperature alloy material (being for example applied to the high-temperature alloy material of aero-engine hot-end component) in height
In fast finishing passes, oxygen, nitrogen, the detection method of content of protium in new top layer (face) is generated.It is shown in Figure 1, this
It is bright to comprise the following steps：
Step 1. according to the characteristic of high-temperature alloy material, the part of high-temperature alloy material is formulated High speed finish machining technique and
Detection frequency, it is desirable to detection frequency >=3 time of formulation；With the phased separation of chip in part during High speed finish machining
On can generate new top layer, to peel off the chip in part as detection sample；
Step 2. carries out High speed finish machining to part according to the technological requirement formulated, and with the detection frequency of formulation at a high speed
The chip peeled off in finishing passes is collected as detection sample：Collection action is completed under stopped status, collected
Detection sample be usually the chip of newest generation, it is desirable to the quality >=1g of the detection sample of collection；The each detection sample that will be collected
The encapsulation of this loading hermetic bag, censorship；
Step 3. carries out respectively the content detection of oxygen, nitrogen, protium with infrared-thermal conductivity combination method to each detection sample, i.e.,
Demarcating flow process by it to the detecting instrument of infrared-thermal conductivity combination method according to each detection sample carries out correspondence demarcation, detection, until
All detection is finished the detection sample of each frequency time；Each detection data is recorded respectively；
The oxygen of each detection sample of the step 4. with regression analysis to detecting, nitrogen, the content data of protium carry out comprehensive
Analyzing and processing is closed, obtains detecting sample comprehensive overall oxygen, nitrogen, the content data of protium, and then obtain high-temperature alloy material
Oxygen, nitrogen, the content data of protium on part new top layer in High speed finish machining；The analyzing and processing of the regression analysis is calculated
Model is：
Y=β0+β1x1+β2x2+...+βmxm+ε；
In formula, y is the comprehensive overall content data of variable-corresponding element；
x1、x2、...、xmFor the technological parameter of independent variable-High speed finish machining；
β0、β1、β2、...、βmFor regression coefficient；
ε is accidental error.
In above-mentioned steps 4, the theoretical foundation of regression analysis is least square method and statistical principle, i.e., according to one
Or the change conditions of one group of independent variable predict the future value of certain stochastic variable for having dependency relation with it.In scientific experimentation, often
The multi-group data of the multiple variables for often being obtained according to actual measurement, finds out functional relation approximate between variable, i.e., analyzing and processing is calculated
Model.
The evolution process of the analyzing and processing computation model of regression analysis is specific as follows：
One. regression analysis general principle
If variable y and m independent variable (x1,x2,...,xm) there is linear relationship (referred to as regression equation), see formula (1) institute
Show：
Y=β0+β1x1+β2x2+...+βmxm+ε (1)；
In formula, y is the comprehensive overall content data of variable-corresponding element；
x1、x2、...、xmFor the technological parameter of independent variable-High speed finish machining；
β0、β1、β2、...、βmFor regression coefficient；
ε is accidental error；
In formula (1), the reckoning of regression coefficient, evolution process are：
-- in being located at n groups observation data, xjIt is x in the observation of i ＆ ltij, then there is multiple linear regression Mathematical Modeling, see
Shown in formula (2)：
yi=β0+β1xi1+β2xi2+...+βmxim+εiI=1,2 ..., n (2)；
In formula (2), εiFor the accidental error of i ＆ lt observation；
-- set β1,β2,...,βmCorresponding least-squares estimation value is b1,b2,...,bm, then observation y of yiSee formula
(3) shown in：
yi=b0+b1xi1+b2xi2+...+bmxim+eiI=1,2 ..., n (3)；
In formula (3), eiFor error εiEstimate, that is, residual error；
-- set yiEstimate beThen have shown in formula (4)：
-- when residual error eiQuadratic sum Q when reaching minimum, observation yiWith estimateIt is fitted preferably, obtains final product such as following formula
(5)：
-- b is determined by the differential method1,b2,...,bm, i.e. solving equations formula (6)：
Abbreviation is arranged can obtain such as following formula (7)：
Order：
-- equation group formula (7) is write as matrix form, is seen as shown in following formula (8)：
(X'X) b=X'Y (8)；
In formula (8), X' is the transposed matrix of X；
-- if note formula (7) coefficient matrices A, right-hand member constant term is B, then have A=X'X, B=X'Y；If A full ranks, i.e. A-1
Exist, then just like following formula (9)：
B=A-1B=(X'X)-1X'Y (9)；
-- regression equation (4) then must be solved；
Two. regression equation significance test
For milling test data, each value y of dependent variable yi(i=1,2 ..., n) has fluctuation, whole n time
The total deviation size of observation can use total sum of squares of deviations to represent, see as shown in following formula (10)：
In formula (10), LyyFor total deviation, that is, total sum of squares of deviations；
N is test level number；
I is independent variable quantity；
yiFor the observation of independent variable y；
For yiMean value；
For yiEstimate；
Q is residual sum of squares (RSS), and the free degree is p=n-m-1, comprising test error and other factors；
U is regression sum of square, and the free degree is p=m, reflects the caused fluctuation of independent variable change itself；
Overall regression effect can be checked using F methods of inspection；Rule of thumb first assume confidence alpha, looking into F distribution tables can obtain Fα
The value of (m, n-m-1), if F values are more than Fα(m, n-m-1), then it represents that popualtion regression effect is significant；In addition, phase relation may also be employed
Number R weighs regression effect, R2=U/ (Q+U) is more intended to 1, represents that the correlation between dependent variable and independent variable is closer.
Below with high temperature alloy NiCr16TiAl as test example (design of part as shown in Figures 2 and 3, with boss), it is right
It carries out the oxygen on new top layer, nitrogen, the content quick detection of protium during High speed finish machining, with this technology to the present invention
Holding carries out in detail, clearly and completely illustrating, specifically includes following content：
-- experimental condition is：Adopted lathe is VDL-850D vertical machining centres；Adopted milling cutter be diameter 16mm, 2
The indexable slotting cutter of Zhuzhou diamond (blade material code name YBG202) of tooth；The machining condition of institute's foundation is shown in as shown in table 1 below；Cut
Cut the boss upper surface that position is part；
With such experimental condition, High-speed Finish Milling processing is carried out to the boss upper surface of high temperature alloy NiCr16TiAl parts；
Table 1
-- the chip for collecting newest generation is shut down, loads hermetic bag censorship, quality is not less than 1g；Dry cutting is collected as far as possible
Bits, if containing cutting fluid, suggestion air gun dries up process；
-- the ONH836 oxygen nitrogen hydrogen analysis that the detecting instrument that infrared-thermal conductivity combination method is adopted is researched and developed for Leco Corporation of the U.S.
Instrument；According to each detection sample, detecting instrument is demarcated respectively, is detected by flow process is demarcated；Testing result is as shown in table 1；
-- using regression analysis to high temperature alloy NiCr16TiAl, during High speed finish machining the oxygen on new top layer, nitrogen,
The content detection data of protium are analyzed process, and regression equation is shown in as shown in following formula (11)：
Regression inspection is as follows：
The F test values of top layer oxygen element content O：F=100000000.00 ＞ F0.03(10,1)=672.546, return effect
Fruit highly significant, R2=1 dependent variable is closely related with independent variable；
The F test values of top layer nitrogen element content N：F=162440.5 ＞ F0.03(10,1)=672.546, regression effect is non-
Chang Xianzhu, R2=1 dependent variable is closely related with independent variable；
The F test values of top layer protium content H：F=100000000.00 ＞ F0.03(10,1)=672.546, return effect
Fruit highly significant, R2=1 dependent variable is closely related with independent variable；
And then obtain high temperature alloy NiCr16TiAl the parts oxygen on new top layer, nitrogen, protium in High speed finish machining and contain
Amount data.
Above concrete technical scheme and specific example only to illustrate the present invention, rather than a limitation；Although with reference to above-mentioned
Specific example and concrete technical scheme have been described in detail to the present invention, it will be understood by those within the art that：
The present invention still can modify to above-mentioned concrete technical scheme, or carry out equivalent to which part technical characteristic,
And these modifications or replacement, do not make the essence disengaging the spirit and scope of the present invention of appropriate technical solution.
Claims (3)
1. new top layer oxygen, nitrogen, protium detection method in a kind of high-temperature alloy material High speed finish machining, comprise the following steps：
Step 1. formulates the part of high-temperature alloy material High speed finish machining technique and detection frequency；During High speed finish machining
New top layer can be generated on part with the phased separation of chip, to peel off the chip in part as detection sample；
Step 2. carries out High speed finish machining to part according to the technological requirement formulated, and with the detection frequency of formulation to high speed finishing
The chip peeled off during work is collected as detection sample, by the encapsulation of each detection sample, the censorship collected；
Step 3. carries out respectively the content detection of oxygen, nitrogen, protium with infrared-thermal conductivity combination method to each detection sample；
The oxygen of each detection sample of the step 4. with regression analysis to detecting, nitrogen, the content data of protium carry out total score
Analysis is processed, and obtains detecting sample comprehensive overall oxygen, nitrogen, the content data of protium, and then obtains high-temperature alloy material part
Oxygen, nitrogen, the content data of protium on new top layer in High speed finish machining；The analyzing and processing computation model of the regression analysis
For：
Y=β0+β1x1+β2x2+...+βmxm+ε；
In formula, y is the comprehensive overall content data of variable-corresponding element；
x1、x2、...、xmFor the technological parameter of independent variable-High speed finish machining；
β0、β1、β2、…、βmFor regression coefficient；
ε is accidental error.
2. new top layer oxygen, nitrogen, protium detection method in high-temperature alloy material High speed finish machining according to claim 1, its
It is characterised by：Detection frequency >=3 time formulated in step 1.
3. new top layer oxygen, nitrogen, protium detection method in high-temperature alloy material High speed finish machining according to claim 1, its
It is characterised by：Quality >=the 1g of the detection sample collected in step 2.
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| JP2012136767A (en) * | 2010-12-28 | 2012-07-19 | Jfe Steel Corp | Method for estimating phosphorus concentration in converter |
| CN104764695A (en) * | 2015-03-26 | 2015-07-08 | 中国船舶重工集团公司第七二五研究所 | Method for determining oxygen/nitrogen/hydrogen content in interalloy for titanium alloys |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012136767A (en) * | 2010-12-28 | 2012-07-19 | Jfe Steel Corp | Method for estimating phosphorus concentration in converter |
| CN104764695A (en) * | 2015-03-26 | 2015-07-08 | 中国船舶重工集团公司第七二五研究所 | Method for determining oxygen/nitrogen/hydrogen content in interalloy for titanium alloys |
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