CN106885719B - A kind of thermal simulation sample spray carbon film position choosing method - Google Patents
A kind of thermal simulation sample spray carbon film position choosing method Download PDFInfo
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- CN106885719B CN106885719B CN201510944451.5A CN201510944451A CN106885719B CN 106885719 B CN106885719 B CN 106885719B CN 201510944451 A CN201510944451 A CN 201510944451A CN 106885719 B CN106885719 B CN 106885719B
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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
- G01N1/32—Polishing; Etching
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Abstract
A kind of thermal simulation sample spray carbon film position choosing method, thermal simulation sample spray carbon film position choosing method provided by the present invention deforms non-uniform feature for thermal simulation sample in hot procedure, obtain the carbon film region with apparent strain and the carbon film region with other dependent variables simultaneously on a thermal simulation sample, and avoid and directly portray carbon film with icking tool, reduce operation difficulty.In addition, the carbon film of differently strained amount has different shape, the carbon film of same shape is used for observation, the comparative analysis of material precipitated phase, improves the reliability of analysis of material pick-up behavior in hot procedure；And carbon film of different shapes is then used to study influence of the dependent variable to material pick-up behavior, improves checkability, reduces experimental cost.
Description
Technical field
The present invention relates to spray carbon film position selecting technology fields more particularly to a kind of thermal simulation sample spray carbon film position to choose
Method.
Background technique
Material modern physics analogue technique is using small sample, using heat simulating tester research material in special process
Under the conditions of tissue and performance changing rule.The key of hot compression physical analogy is the uniaxial stressed state of acquisition material,
That is the homogeneous deformation of material, but in a practical situation due to the influence between sample and pressure head end face there are frictional force, deformation is completed
It is small and intermediate convex dolioform to will appear upper and lower end face for sample afterwards, i.e. generation differential deformation.The inhomogeneities of deformation will increase
The difficulty of the precipitation facies analysis of research material.The common method of analysis of material precipitated phase be by carbon replication, however, by
In thermal modeling test sample compressive deformation there are inhomogeneities, sample internal strain is unevenly distributed, and needs reasonably to choose
Position to be seen is required with meeting research.Currently, mainly rule of thumb choosing thermal simulation sample spray carbon film observes position, and
The square of certain length and width is marked in coated surface with icking tool, then, sample is put into decarburization film in appropriate corrosive liquid and is passed through
Carbon film is removed in acid corrosion.Sample spray carbon surface is portrayed with icking tool, height is required to the operating technology of operator, be easy to produce deviation, make
It is improper to choose at the position of sample carbon film, then influences whether the analysis of material precipitated phase as a result, even resulting in wrong conclusion, because
This solves the deficiencies in the prior art it is necessary to propose a kind of spray carbon film choosing method of thermal simulation sample.
Summary of the invention
The present invention provides a kind of thermal simulation samples to spray carbon film position choosing method, and this method is suitable for deforming non-uniform
Thermal simulation sample obtains the carbon film position for corresponding to the practical rolling dependent variable of simulation on sample, reduces the difficulty for portraying carbon film,
Improve the reliability of the analysis of material pick-up behavior in hot procedure.
To achieve the above object, the present invention is implemented with the following technical solutions:
A kind of thermal simulation sample spray carbon film position choosing method, includes the following steps:
1) according to simulation test technological parameter, thermal modeling test is carried out, obtains thermal simulation sample, simulation sample is cut
It cuts, polishes, polishes, go out its metallographic structure using corrosion corrosion；
2) according to the working process parameter of thermal simulation sample, thermal simulation sample is calculated by finite element analysis software and is existed
Set the diagram of strains under process conditions；
From strain in sample is found out in figure, equal to the position of apparent strain, apparent strain is the dependent variable of technique initialization；
Other dependent variable positions are found out from figure again as investigation and comparison region, it is therefore an objective on a thermal simulation sample
The carbon film with differently strained amount region is selected simultaneously；
It chooses same strain amount region and prepares carbon film, compare convenient for analysis, increase the reliability of inspection；
It chooses differently strained amount region and prepares carbon film, to detect that dependent variable material is precipitated in hot procedure row
For influence；
3) it according to the Strain Distribution in step 2, is proportionally plotted on a partition, simulates and try in partition and step 1
Sample face to be seen geomery having the same is chosen dependent variable investigation and comparison region, is portrayed on corresponding Strain Distribution line
Hole of different shapes out, and it is in the geometric center of carved shape on Strain Distribution line；In order to be compared analysis, symmetrically
Choose the position for portraying hole；Strain the hole that same shape is portrayed in identical position, strain different positions portray it is of different shapes
Hole；
4) partition designed in step 3 is placed on the simulation sample face to be seen handled by step 1, then will be had
The thermal simulation sample of partition is placed in vacuum coating equipment, carries out high vacuum spraying plating carbon film；
5) the simulation sample for having sprayed carbon film in step 4 is taken out, removes partition described in step 3, obtains only wait see
The simulation sample of region spraying plating carbon film is examined, and is put it into corrosive liquid, is fallen off to carbon film, is pulled out carbon film with wire netting, and
It is put into alcohol and the mixed liquor of deionized water, carbon film is unfolded using the tension of deionized water, take carbon film according to carving in step 3
Different shape, by the carbon film of expansion again with wire netting respectively by the carbon film with same shape be transferred to it is other fill alcohol with
In the container of deionized water mixed liquor；Observation, comparative analysis of the carbon film of same shape for material precipitated phase, and different shape
Carbon film be then used to analyze influence of the dependent variable to material pick-up behavior.
Compared with prior art, the beneficial effects of the present invention are:
Thermal simulation sample spray carbon film position choosing method provided by the present invention is for thermal simulation sample in hot procedure
The middle non-uniform feature of deformation obtains the carbon film region with apparent strain simultaneously on a thermal simulation sample and has it
The carbon film region of its dependent variable, and avoid and directly portray carbon film with icking tool, reduce operation difficulty.In addition, differently strained amount
Carbon film there is different shape, the carbon film of same shape is used for observation, the comparative analysis of material precipitated phase, improves analysis of material
The reliability of pick-up behavior in hot procedure；And carbon film of different shapes is then used to study dependent variable to material pick-up behavior
Influence, improve checkability, reduce experimental cost.
Detailed description of the invention
Fig. 1 is the distribution map of the thermal simulation sample dependent variable of embodiment 1；
Fig. 2 is in embodiment 1 according to the overall pattern of the portrayed partition of thermal simulation sample dependent variable distribution map；
In figure: 1- un-deformed area, it is 50% region that 2-, which is dependent variable along curve regions, and 3- is dependent variable along curve regions
For 75% region, 4- square hole region, 5- diamond shape bore region, 6- slot region.
Specific embodiment
A specific embodiment of the invention is further illustrated with reference to the accompanying drawing:
A kind of thermal simulation sample spray carbon film position choosing method, includes the following steps:
1) according to simulation test technological parameter, thermal modeling test is carried out, obtains thermal simulation sample, simulation sample is cut
It cuts, polishes, polishes, go out its metallographic structure using corrosion corrosion；
2) according to the working process parameter of thermal simulation sample, thermal simulation sample is calculated by finite element analysis software and is existed
Set the diagram of strains under process conditions；
From strain in sample is found out in figure, equal to the position of apparent strain, apparent strain is the dependent variable of technique initialization；
Other dependent variable positions are found out from figure again as investigation and comparison region, which can be as the case may be non-
It is arbitrarily chosen on the position of apparent strain, it is therefore an objective to be selected simultaneously with differently strained amount region on a thermal simulation sample
Carbon film；
It chooses same strain amount region and prepares carbon film, compare convenient for analysis, increase the reliability of inspection；
It chooses differently strained amount region and prepares carbon film, to detect that dependent variable material is precipitated in hot procedure row
For influence；
3) it according to the Strain Distribution in step 2, is proportionally plotted on a partition, simulates and try in partition and step 1
Sample face to be seen geomery having the same is chosen dependent variable investigation and comparison region, is portrayed on corresponding Strain Distribution line
Hole of different shapes out, and it is in the geometric center of carved shape on Strain Distribution line；In order to be compared analysis, symmetrically
Choose the position for portraying hole；Strain the hole that same shape is portrayed in identical position, strain different positions portray it is of different shapes
Hole；
4) partition designed in step 3 is placed on the simulation sample face to be seen handled by step 1, then will be had
The thermal simulation sample of partition is placed in vacuum coating equipment, carries out high vacuum spraying plating carbon film；
5) the simulation sample for having sprayed carbon film in step 4 is taken out, removes partition described in step 3, obtains only wait see
The simulation sample of region spraying plating carbon film is examined, and is put it into corrosive liquid, is fallen off to carbon film, is pulled out carbon film with wire netting, and
It is put into alcohol and the mixed liquor of deionized water, carbon film is unfolded using the tension of deionized water, take carbon film according to carving in step 3
Different shape, by the carbon film of expansion again with wire netting respectively by the carbon film with same shape be transferred to it is other fill alcohol with
In the container of deionized water mixed liquor；Observation, comparative analysis of the carbon film of same shape for material precipitated phase, and different shape
Carbon film be then used to analyze influence of the dependent variable to material pick-up behavior.
Embodiment 1:
1) the processing technology description of thermal simulation sample: test material selects low-carbon low-alloy steel, and material is processed into Φ 10
The cylindric sample of × 15mm.Sample is heated to 1000 DEG C using heat simulating tester, 3 minutes are kept the temperature, then, with 1s-1
Strain rate sample is compressed into 7.5mm, engineering strain 50%；
2) sample in step 1 polished, be polished to surface no marking, using the alcoholic solution containing 4% nitric acid
Corrode its metallographic structure out；The concentration of alcoholic solution is 75%.
3) according to the test parameters in step 1, finite element numerical simulation is carried out using Abaqus software, obtains thermal simulation examination
Diagram of strains of the sample in the case where setting process conditions；As shown in Figure 1, region in diagram of strains are as follows: un-deformed area 1, along song
Line region is that dependent variable is 50% region 2, be dependent variable along curve regions is 75% region 3.Wherein dependent variable is 50% region 2
For nominal strain region, dependent variable is that 75% region 3 is investigation and comparison region.
4) according to the diagram of strains determined in step 3, divided on the hardboard with certain viscosity with stamping knife
Do not depict the diamond hole of square hole, two that two side lengths are 2mm and the rectangular opening that two long 2.5mm wide are 2mm symmetrically,
So as to comparative analysis.Square hole region 4 is no strain region carbon film position, and diamond shape bore region 5 is that dependent variable is 50% region
Carbon film position, rectangle bore region 6 are that dependent variable is 75% region carbon film position, as shown in Figure 2.In the shape geometry in portrayed hole
The heart is in the strain region center of research；
5) hardboard in step 4 is adhered on the simulation sample face to be seen handled through step 2, and be placed in
In DM220 high vacuum coating unit, high vacuum spraying plating carbon film is carried out；
6) after carbon film spraying plating is good, hardboard is removed, and thermal simulation sample is put into the alcohol (alcohol containing 10% nitric acid
The concentration of solution be 75%) in corrosion, fall off to carbon film, pulled out carbon film with wire netting, be put into mass ratio be 1:1 alcohol and
In the mixed liquor of deionized water, the carbon film of expansion is in different shape, is respectively shifted the carbon film with same shape with wire netting
Into other containers for filling alcohol and deionized water mixed liquor.The carbon film of same shape is used for the observation of material precipitated phase, ratio
Compared with analysis, and carbon film of different shapes is then used to analyze influence of the dependent variable to material pick-up behavior.
Claims (1)
1. a kind of thermal simulation sample sprays carbon film position choosing method, which comprises the steps of:
1) according to simulation test technological parameter, thermal modeling test is carried out, obtains thermal simulation sample, simulation sample is cut,
Polishing, polishing go out its metallographic structure using corrosion corrosion；
2) according to the working process parameter of thermal simulation sample, thermal simulation sample is calculated by finite element analysis software and is being set
Diagram of strains under process conditions；
From strain in sample is found out in figure, equal to the position of apparent strain, apparent strain is the dependent variable of technique initialization；
Other dependent variable positions are found out from figure again as investigation and comparison region, it is therefore an objective on a thermal simulation sample simultaneously
Select the carbon film with differently strained amount region；
It chooses same strain amount region and prepares carbon film, compare convenient for analysis, increase the reliability of inspection；
Choose differently strained amount region and prepare carbon film, to detect dependent variable to material the pick-up behavior in hot procedure
It influences；
3) it according to the Strain Distribution in step 2, is proportionally plotted on a partition, partition is waited for simulation sample in step 1
Viewing surface is of similar shape size, chooses dependent variable investigation and comparison region and apparent strain region, answers variation corresponding
Hole of different shapes is depicted in wiring, and is in the geometric center of carved shape on Strain Distribution line；In order to be compared
The position for portraying hole is symmetrically chosen in analysis；The hole that same shape is portrayed in identical position is strained, different positions is strained and portrays
Hole of different shapes；
4) partition designed in step 3 is placed on the simulation sample face to be seen handled by step 1, then will have partition
Thermal simulation sample be placed in vacuum coating equipment, carry out high vacuum spraying plating carbon film；
5) the simulation sample for having sprayed carbon film in step 4 is taken out, removes partition described in step 3, obtains area only to be seen
The simulation sample of domain spraying plating carbon film, and put it into corrosive liquid, it falls off, is pulled out carbon film with wire netting, and be put into carbon film
In alcohol and the mixed liquor of deionized water, carbon film is unfolded using the tension of deionized water, takes carbon film not according to carving in step 3
Similar shape, by the carbon film of expansion again with wire netting respectively by the carbon film with same shape be transferred to it is other fill alcohol and go from
In the container of sub- water mixed liquid；Observation, comparative analysis of the carbon film of same shape for material precipitated phase, and carbon of different shapes
Film is then used to analyze influence of the dependent variable to material pick-up behavior.
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