CN108426838A - A method of simulation metallic powder material grains are grown up behavior - Google Patents
A method of simulation metallic powder material grains are grown up behavior Download PDFInfo
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- CN108426838A CN108426838A CN201810061818.2A CN201810061818A CN108426838A CN 108426838 A CN108426838 A CN 108426838A CN 201810061818 A CN201810061818 A CN 201810061818A CN 108426838 A CN108426838 A CN 108426838A
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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
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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
- G01N1/44—Sample treatment involving radiation, e.g. heat
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Abstract
The present invention relates to metal material fields, a kind of simulation metallic powder material grains are disclosed to grow up the method for behavior, the island shape region of a φ 0.2~0.5 connect with body portion is cut using linear cutting equipment in the matrix of samples to be seen that size is φ 5~10 × 3, utilization " island shape region " is simulated dusty material and grown up behavior using the crystal grain of high-temperature laser Laser Scanning Confocal Microscope home position observation reguline metal matrix and powdered metal material.Blocky and dusty material is combined together by sample prepared by the present invention, the problem of the burnt observation of high-temperature laser copolymerization cannot individually be carried out by overcoming powdered sample, and the crystal grain for being copolymerized using high-temperature laser burnt home position observation bulk and powdered metal material is grown up behavior.Preparation method provided by the invention is simple for process, easily operated, of low cost；It is proposed by the present invention to be copolymerized the behavior of growing up of burnt home position observation powdered metal material crystal grain using high-temperature laser and provide new thinking for the grow up research of behavior of dusty material crystal grain.
Description
Technical field
The invention belongs to metal material field, it is related to a kind of simulation metallic powder material grains and grows up the method for behavior.
Background technology
The size of austenite grain is to weigh the important indicator of steel heating, it is to the cooling transformation of steel and the group of transmutation product
It knits and performance has extreme influence.Under normal conditions, austenite grain is more tiny, and the obdurability of steel is better after heat treatment.It is difficult to understand
The quantity of nucleation point when the size of family name's body crystal grain also determines phase transformation, to determine the tissue after transformation rate and phase transformation.Therefore,
The behavior of growing up for understanding austenite obtains good obdurability and has important meaning to formulating rational heat treatment process and material
Justice.
The very long stage is had gone through for the crystal grain of steel material behavioral study of growing up.The experimental study of early stage is
To heat treatment temperature, soaking time, heating speed, the chemical composition of steel and steel original structure to Austenite Grain Growth row
For influence do a lot of work, but due to the limitation of technical merit, these work are limited to the tissue after heat treatment
Observation, cannot intuitively embody grain growth process, can only make qualitative analysis, the detailed problem in grain growth process also has
It is to be solved.
High-temperature laser Laser Scanning Confocal Microscope is Japanese Lasertec companies by common focus point migration, infrared heating, stretching
Etc. technologies combine, being can be with the confocal laser scanning microscope, CLSM of home position observation material at high temperature microstructure Evolution.The product can be into
The home position observation of sample topography under the row condition of high temperature, is intuitive research material heating process microstructure evolution, and cooling procedure phase transformation is high
The important tool of the processes such as temperature stretching.Therefore, crystal grain can more intuitively be studied by high-temperature laser Laser Scanning Confocal Microscope
Behavior of growing up.But since the preparation of high-temperature laser Laser Scanning Confocal Microscope sample requires sample surfaces levelness high, surface must
Uniform polish need be passed through and surface roughness is low as possible, not there is cut, it is brilliant that this just significantly limits powdered sample
The research of the big behavior of grain length.And currently, grow up behavior for dusty material crystal grain and bulk material crystal grain is grown up the area of behavior
It is not rarely reported.
It grows up behavior critical issue urgently to be resolved hurrily in view of the above research background and dusty material crystal grain, the present invention proposes
A kind of simulation metallic powder material grains are grown up the research method of behavior, by the method for preparing sample of designed, designed and combine high temperature
The crystal grain of laser confocal microscope, home position observation dusty material and bulk material is grown up behavior.
Invention content
In order to solve the above technical problems, a kind of side for behavior of growing up the present invention provides simulation metallic powder material grains
Method is grown up behavior for the crystal grain of home position observation dusty material and bulk material.
Specific technical solution is as follows：
A method of simulation metallic powder material grains are grown up behavior, are as follows：
(1) preparation of sample：It prepares and requires according to high-temperature laser Laser Scanning Confocal Microscope sample, size is prepared using wire cutting
For the cylindrical sample of 5~10mm of diameter, height 3mm；Using wire cutting, one and base are processed in said sample center
The size of body portion connection is the island shape region of diameter 0.2~0.5, height 3mm；One of parallel surfaces are utilized
240#, 400#, 600#, 800#, 1000#, 1200#, 1500#SiC sand paper are ground successively, then again use DNW2.5 it is water-soluble
Diamond paste is polished on Full-automatic polishing machine, after alcohol clean surface, is obtained for studying powdered material
Material crystal grain is grown up the burnt sample of high-temperature laser copolymerization of behavior；
(2) high-temperature laser prepared is copolymerized burnt sample to be placed in the burnt crucible of high-temperature laser copolymerization, setting experiment work
Skill parameter：Heating speed is 0.1 DEG C/s, and final heating temperature is 1200 DEG C, 1 hour is kept the temperature at such a temperature, with 60 DEG C/s's
Rate is cooled to room temperature；The row of growing up that home position observation heats up with crystal grain and matrix grain at " island shape region " in insulating process
For.
(3) high-temperature laser is total to focus set according to preset program, is recorded in experimentation with graphic form automatically
The behavior of growing up of crystal grain, after experiment, system is automatically by picture synthetic video.
The method can be used for metal material crystal grain and grow up the research of behavior.
Compared with prior art, the present invention has the advantages that：
(1) it is grown up the sample of behavior using prepared by the method for the present invention for observing dusty material crystal grain, due to being
" island shape region " shape and surrounding matrix do not interact, and also masterpiece is not answered by surrounding matrix in grain growth process
With crystal grain identical with the stress state suffered by dusty material grain growth process, therefore can be used for simulating dusty material
It grows up behavior.
(2) using the method for the present invention prepare for observe dusty material crystal grain grow up behavior same sample on it is same
When contain the part (island shape region) for simulating powdered sample and blocky sample (metallic matrix) part, can be used for original simultaneously
Both position observations crystal grain is grown up the difference of behavior.
(3) " island " sample prepared using the method for the present invention is only included 1~5 large scale crystal grain, can be used in height
The behavior of growing up that the independent crystal grain not acted on by surrounding grains is studied under warm laser co-focusing equipment, it is single to overcome home position observation
Crystal grain is grown up the difficult point of behavior.
(4) be copolymerized using high-temperature laser burnt the crystal grain of home position observation dusty material and bulk material can be grown up row simultaneously
For this belongs to pioneering in the research for growing up behavior for crystal grain at present.
(5) preparation method provided by the invention is simple for process, easily operated, low for equipment requirements, at low cost.
Description of the drawings
Fig. 1 is the burnt sample schematic diagram of high-temperature laser copolymerization made from embodiment 1；
Fig. 2 is the grain shaped by burnt " island " sample observed of high-temperature laser copolymerization at 1200 DEG C in embodiment 1
Looks；
Fig. 3 is the sample grain morphology by the burnt matrix observed of high-temperature laser copolymerization at 1200 DEG C in embodiment 1.
Specific implementation mode
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings, but protection scope of the present invention is not by attached
Figure and specific embodiment are limited.
Embodiment 1
By taking Fe-Mn-Cr systems steel as an example, research bulk material and the crystal grain for simulating dusty material are grown up behavior.
(1) preparation of sample
Fig. 1 is the burnt sample schematic diagram of high-temperature laser copolymerization made from embodiment 1, as shown, first, using wire cutting plus
Then the cylindrical sample of 7 × 3mm of work φ processes a circle " island shape area connected with body portion at the sample center
Domain ", size are 0.3 × 3mm of φ.Then, by sample in 240#, 400#, 600#, 800#, 1000#, 1200#, 1500#SiC sand
Paper is ground successively, is polished using polishing machine.To ensure surfacing in sample preparation, it is clean, without cut.
(2) crystal grain is grown up behavior observation
It is 0.1 DEG C/s to focus on the rate of heat addition altogether using high-temperature laser, and heating temperature is 1200 DEG C, and soaking time is 1 small
When under conditions of observe the crystal grain of grow up behavior and the matrix of crystal grain in " island shape region " respectively and grow up behavior.Observe result table
Bright, the crystal grain in by " the island shape region " of surrounding grains effect is not grown up relatively slowly, and crystallite dimension is about at a temperature of 1200 DEG C
10~20 μm；And the crystal grain growth rate in by the matrix of surrounding grains effect is very fast, crystallite dimension is about at a temperature of 1200 DEG C
100~200 μm.
Fig. 2 is the grain shaped by the burnt island shape sample observed of high-temperature laser copolymerization at 1200 DEG C in embodiment 1
Looks, Fig. 3 are the sample grain morphology by the burnt matrix observed of high-temperature laser copolymerization at 1200 DEG C in embodiment 1.Such as figure
It is shown：
Under 1200 DEG C of heat-retaining condition, the crystallite dimension in Fig. 2 island shapes region is about 15 μm, Fig. 3 island shapes area
About 100~200 μm of the crystallite dimension of domain surrounding matrix, thus we can obtain, in matrix the growth process of crystal grain in addition to
Outside by Thermodynamic effect, also by kinetics function.Since crystal grain is grown up the stress by surrounding grains, this answers masterpiece
Driving force is provided with for growing up for crystal grain, promotes growing up for crystal grain, on the other hand, the interaction of surrounding grains is conducive to
Annex each other and grows up.And single growing up for crystal grain fully relies on Thermodynamic effect, coarsening rate is significantly restrained.
Claims (2)
- A kind of method of behavior 1. simulation metallic powder material grains are grown up, which is characterized in that be as follows：(1) preparation of sample：It prepares and requires according to high-temperature laser Laser Scanning Confocal Microscope sample, it is straight to prepare size using wire cutting The cylindrical sample of 5~10mm of diameter, height 3mm；Using wire cutting, one and matrix part are processed in said sample center It is the island shape region of diameter 0.2~0.5, height 3mm to divide the size of connection；One of parallel surfaces are utilized into 240#, 400#, 600#, 800#, 1000#, 1200#, 1500#SiC sand paper are ground successively, then use the water-soluble Buddha's warrior attendant of DNW2.5 again Stone abrasive pastes are polished on Full-automatic polishing machine, after alcohol clean surface, are obtained for studying dusty material crystalline substance The burnt sample of high-temperature laser copolymerization of the big behavior of grain length；(2) high-temperature laser prepared is copolymerized burnt sample to be placed in the burnt crucible of high-temperature laser copolymerization, setting test technology is joined Number：Heating speed is 0.1 DEG C/s, and final heating temperature is 1200 DEG C, 1 hour is kept the temperature at such a temperature, with the rate of 60 DEG C/s It is cooled to room temperature；The behavior of growing up that home position observation heats up with crystal grain and matrix grain at island shape region in insulating process.(3) high-temperature laser is total to focus set according to preset program, records crystal grain in experimentation automatically with graphic form Behavior of growing up, after experiment, system is automatically by picture synthetic video.
- The method of behavior 2. simulation metallic powder material grains according to claim 1 are grown up, it is characterised in that：It is described Method can be used for metal material crystal grain and grow up the research of behavior.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109540891A (en) * | 2018-12-07 | 2019-03-29 | 攀钢集团攀枝花钢铁研究院有限公司 | The method of high temperature alloy heat treatment visual Simulation |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101413786A (en) * | 2008-11-28 | 2009-04-22 | 首钢总公司 | Method for measuring austenite crystal dimension by high temperature laser microscope |
| CN102520001A (en) * | 2011-12-06 | 2012-06-27 | 首钢总公司 | Crystallization behavior of slag material and determination method of crystallization temperature |
| CN103592328A (en) * | 2013-11-07 | 2014-02-19 | 首钢总公司 | Method for detecting Austenitic coarsening temperature of steel |
| CN104101602A (en) * | 2014-07-16 | 2014-10-15 | 首钢总公司 | Observation method of B-type inclusion behaviors in aluminum killed steel |
| CN104237280A (en) * | 2014-09-05 | 2014-12-24 | 北京科技大学 | Method for detecting solid-phase reaction between inclusions and alloy matrix in thermal treatment process |
-
2018
- 2018-01-23 CN CN201810061818.2A patent/CN108426838A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101413786A (en) * | 2008-11-28 | 2009-04-22 | 首钢总公司 | Method for measuring austenite crystal dimension by high temperature laser microscope |
| CN102520001A (en) * | 2011-12-06 | 2012-06-27 | 首钢总公司 | Crystallization behavior of slag material and determination method of crystallization temperature |
| CN103592328A (en) * | 2013-11-07 | 2014-02-19 | 首钢总公司 | Method for detecting Austenitic coarsening temperature of steel |
| CN104101602A (en) * | 2014-07-16 | 2014-10-15 | 首钢总公司 | Observation method of B-type inclusion behaviors in aluminum killed steel |
| CN104237280A (en) * | 2014-09-05 | 2014-12-24 | 北京科技大学 | Method for detecting solid-phase reaction between inclusions and alloy matrix in thermal treatment process |
Non-Patent Citations (2)
| Title |
|---|
| FUCHS, N.ET AL.: "In-situ Observation of Austenite Grain Growth in Plain Carbon Steels by Means of High-temperature Laser Scanning Confocal Microscopy", 《BERG HUETTENMAENN MONATSH》 * |
| 胡海江等: "先进贝氏体钢奥氏体晶粒长大行为的动态观察", 《材料热处理学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109540891A (en) * | 2018-12-07 | 2019-03-29 | 攀钢集团攀枝花钢铁研究院有限公司 | The method of high temperature alloy heat treatment visual Simulation |
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