CN105628479A - Polishing method aiming at metallographic specimen of of pore-closed type porous material - Google Patents
Polishing method aiming at metallographic specimen of of pore-closed type porous material Download PDFInfo
- Publication number
- CN105628479A CN105628479A CN201510967905.0A CN201510967905A CN105628479A CN 105628479 A CN105628479 A CN 105628479A CN 201510967905 A CN201510967905 A CN 201510967905A CN 105628479 A CN105628479 A CN 105628479A
- Authority
- CN
- China
- Prior art keywords
- polishing
- metallographic specimen
- lubricant
- kbm401
- porous material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a polishing method for a metallographic specimen of a pore-closed type porous material. The polishing method comprises the following steps: mixing Cr2O3, water and a KBM401 lubricant according to a certain proportion, using a magnetic stirring apparatus to stir and mix, so as to obtain a polishing liquid; wetting a piece of polishing cloth with the polishing liquid, and polishing the surface of the ground metal honeycomb metallographic specimen in a polishing machine; changing a piece of new polishing cloth, wetting the cloth with the KBM401 lubricant, and using the KBM401 lubricant as a cleaning liquid to clean the surface of the metal honeycomb metallographic specimen. The polishing method, disclosed by the invention, has the advantages of using lubrication and cleaning functions of the lubricant to reduce adhesion of the cut material on the metallographic specimen and the polishing cloth and solving the problem that the cut material is easy to transfer into pores of the porous material while ensuring the micro-cutting effect of the Cr2O3 particles. With adoption of the two-step method including removing scratches and cleaning, the scratch-free metallographic specimen is ensured to be obtained, while the actual metallographic structure of the pore-closed type porous material is obtained.
Description
Technical field
The present invention relates to a kind of finishing method for hole enclosed type porous material metallographic specimen, belong to technical field of metallographic preparation.
Background technology
Metal beehive is the important seal structure of one of modern aeroengine, is formed by nickel-base honeycomb is powder sintered with the nickel aluminum metal being filled in honeycomb hole, wherein obtains being typical porous material after nickel aluminium powder sintering. The metallography preparation of metal beehive and detection are the key links controlling honeycomb parts sintering quality, aeronautical maintenance handbook specifies, in the sintering process of every batch of honeycomb parts, it is necessary to same batch sinters honeycomb sample with stove, is used for preparing honeycomb metallographic specimen and carrying out metallographic detection. Whether the metallographic detection of honeycomb sample includes tenor, hole distribution and size, the unconsolidated formation degree of depth, soldering point integrity, spreads, whether honeycomb wall the index requests such as layering and oxidation occur, and the premise carrying out accurate metallographic detection is to prepare qualified (ensureing the verity of metal beehive metallographic specimen structure) metallographic specimen.
For metal beehive, owing to nickel aluminum metal powder is a kind of nickel alclad structure, owing to spreading mutually the gap that can form closing between nickel aluminium powder in high-temperature sintering process, simultaneously because self-diffusion can be become hollow ball by medicine ball, thus causing in metal beehive after sintering, except some " non-close type " holes, there is also substantial amounts of " enclosed type " hole. For " non-close type " hole; adopt the mode that vacuum is inlayed; can help get rid of resin agitating and shrink the bubble produced in solidification process; promote that resin is to the filling of porous material " non-close type " hole and the protection to sample edge, thus the structure verity ensured in metallographic sample preparation. And for " enclosed type " hole, inlaying resin cannot carry out osmotic protection to it, thereby ensure that the verity of its structure is one of the difficult point in metallography preparation field. Wherein the most thorny issue is, in the polishing process of metallographic specimen, the nickel aluminum metal being cut off is highly susceptible to roll and then transfer to the inside of metal beehive hole, causes obtaining real structure.
The essence of polishing process is the three-body abrasive wear between abrasive particle, polishing cloth and sample, and what solve the problems referred to above it is critical only that the adhesion reducing the nickel aluminum metal being cut in wear process on specimen surface, but still lacks effective method at present.
Summary of the invention
In order to solve the problems referred to above, it is an object of the invention to provide a kind of finishing method for hole enclosed type porous material metallographic specimen.
In order to achieve the above object, the finishing method for hole enclosed type porous material metallographic specimen provided by the invention includes the following step of carrying out in order:
1) by analytically pure Cr2O3Powder, water and KBM401 lubricant adopt magnetic stirring apparatus to stir mixing at ambient temperature after being mixed in proportion, and are thus configured to the polishing fluid with lubrication and cleaning function;
2) by polishing cloth with above-mentioned polishing fluid moistening, the metal beehive metallographic specimen of milled of then fighting each other on automatic polishing machine is polished, and utilize watering can to continue to spray above-mentioned polishing fluid in polishing disk in polishing process, to remove the cut on metal beehive metallographic specimen surface, and metallographic specimen is carried out preliminary lubrication and cleaning;
3) polishing cloth more renewed, and with KBM401 lubricant by its moistening, then it is cleaned processing to the metal beehive metallographic specimen surface after above-mentioned removal cut using KBM401 lubricant as cleaning solution, cleaning process utilizes watering can continue to spray KBM401 lubricant in polishing disk, thus prepare structure real hole enclosed type porous metals honeycomb metallographic specimen.
In step 1) in, Cr in described polishing fluid2O3After the mass percent of powder, water and KBM401 lubricant, mixing, the rotating speed of magnetic stirring apparatus and mixing time are respectively as follows:
Cr2O3: 9��13%;
Water: 57��66%;
KBM401 lubricant: 25��30%;
Rotating speed: 200��300r/min
Mixing time: >=30min.
In step 2) in, the technological parameter of described polishing process is respectively as follows:
The rotating speed of automatic polishing machine: 135��150r/min;
Pressure is 17��22N;
Polishing time is 3��4min.
In step 3) in, the technological parameter of described cleaning process is respectively as follows:
The rotating speed of buffing machine is 190��210r/min;
Pressure is 7��11N;
Cleaning time is 1��1.5min.
In step 2) and step 3) in, described polishing cloth is down canvas.
Finishing method for hole enclosed type porous material metallographic specimen provided by the invention has the advantage that
(1) Cr can ensured2O3While granule micro mechanics effect, it is substantially reduced the adhesive attraction being cut material on metallographic specimen and polishing cloth by the lubrication of lubricant and cleaning action, solves and be cut material and be easily transferred to the problem within porous material hole.
(2) method that " removal cut " and " cleaning " two step is walked is adopted, it is possible to while ensureing to obtain no marking metallographic specimen, obtain the hole real structure of enclosed type porous material.
Accompanying drawing explanation
The stereoscan photograph of Fig. 1 (a) and Fig. 1 (b) respectively powder sintered front and back of nickel aluminum metal and composition analysis result.
Fig. 2 is the abnormal metallograph of the metal beehive sample adopting conventional polishing process to obtain, wherein, the whole sample metallograph of inlaying that Fig. 2 (a) obtains for adopting microscope picture mosaic technology, the partial enlargement metallograph that Fig. 2 (b) is Fig. 2 (a).
Fig. 3 is for the same metal beehive sample in Fig. 2, adopt the metallograph that finishing method of the present invention obtains, wherein, the whole sample metallograph of inlaying that Fig. 3 (a) obtains for adopting microscope picture mosaic technology, the partial enlargement metallograph that Fig. 3 (b) is Fig. 3 (a).
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the finishing method for hole enclosed type porous material metallographic specimen provided by the invention is described in detail.
Embodiment 1:
The finishing method for hole enclosed type porous material metallographic specimen that the present embodiment provides includes the following step carried out in order:
1) by analytically pure for 9kg Cr2O3Adopt magnetic stirring apparatus to stir mixing 30min under the rotating speed of room temperature and 200r/min after powder, 61kg water and 30kgKBM401 mix lubricant, be thus configured to the polishing fluid with lubrication and cleaning function;
2) using as the down canvas of polishing cloth with above-mentioned polishing fluid moistening, the metal beehive metallographic specimen of milled of then fighting each other on automatic polishing machine is polished, the rotating speed of automatic polishing machine is 150r/min, pressure is 22N, polishing time is 3min, and utilize watering can to continue to spray above-mentioned polishing fluid in polishing disk in polishing process, to remove the cut on metal beehive metallographic specimen surface, and metallographic specimen is carried out preliminary lubrication and cleaning;
3) the down canvas as polishing cloth more renewed, and with KBM401 lubricant by its moistening, then it is cleaned processing to the metal beehive metallographic specimen surface after above-mentioned removal cut using KBM401 lubricant as cleaning solution, the rotating speed of buffing machine is 190r/min, pressure is 7N, cleaning time is 1.5min, utilizes watering can to continue to spray KBM401 lubricant in polishing disk, thus prepare structure real hole enclosed type porous metals honeycomb metallographic specimen in cleaning process.
Embodiment 2:
The finishing method for hole enclosed type porous material metallographic specimen that the present embodiment provides includes the following step carried out in order:
1) by analytically pure for 13kg Cr2O3Adopt magnetic stirring apparatus to stir mixing 35min under the rotating speed of room temperature and 300r/min after powder, 60kg water and 27kgKBM401 mix lubricant, be thus configured to the polishing fluid with lubrication and cleaning function;
2) using as the down canvas of polishing cloth with above-mentioned polishing fluid moistening, the metal beehive metallographic specimen of milled of then fighting each other on automatic polishing machine is polished, the rotating speed of automatic polishing machine is 140r/min, pressure is 20N, polishing time is 3.5min, and utilize watering can to continue to spray above-mentioned polishing fluid in polishing disk in polishing process, to remove the cut on metal beehive metallographic specimen surface, and metallographic specimen is carried out preliminary lubrication and cleaning;
3) the down canvas as polishing cloth more renewed, and with KBM401 lubricant by its moistening, then it is cleaned processing to the metal beehive metallographic specimen surface after above-mentioned removal cut using KBM401 lubricant as cleaning solution, the rotating speed of buffing machine is 200r/min, pressure is 11N, cleaning time is 1min, utilizes watering can to continue to spray KBM401 lubricant in polishing disk, thus prepare structure real hole enclosed type porous metals honeycomb metallographic specimen in cleaning process.
Embodiment 3:
The finishing method for hole enclosed type porous material metallographic specimen that the present embodiment provides includes the following step carried out in order:
1) by analytically pure for 11kg Cr2O3Adopt magnetic stirring apparatus to stir mixing 35min under the rotating speed of room temperature and 250r/min after powder, 64kg water and 25kgKBM401 mix lubricant, be thus configured to the polishing fluid with lubrication and cleaning function;
2) using as the down canvas of polishing cloth with above-mentioned polishing fluid moistening, the metal beehive metallographic specimen of milled of then fighting each other on automatic polishing machine is polished, the rotating speed of automatic polishing machine is 135r/min, pressure is 17N, polishing time is 4min, and utilize watering can to continue to spray above-mentioned polishing fluid in polishing disk in polishing process, to remove the cut on metal beehive metallographic specimen surface, and metallographic specimen is carried out preliminary lubrication and cleaning;
3) the down canvas as polishing cloth more renewed, and with KBM401 lubricant by its moistening, then it is cleaned processing to the metal beehive metallographic specimen surface after above-mentioned removal cut using KBM401 lubricant as cleaning solution, the rotating speed of buffing machine is 210r/min, pressure is 9N, cleaning time is 1.2min, utilizes watering can to continue to spray KBM401 lubricant in polishing disk, thus prepare structure real hole enclosed type porous metals honeycomb metallographic specimen in cleaning process.
In order to verify the effect of the finishing method for hole enclosed type porous material metallographic specimen provided by the invention, the hole enclosed type porous metals honeycomb metallographic specimen prepared according to above-described embodiment (is adopted Cr with adopting conventional polishing process by the present inventor2O3Aqueous solution be polished) the metal beehive metallographic specimen that obtains carried out observation and component analysis respectively under scanning electron microscope and metallurgical microscope.
The stereoscan photograph of Fig. 1 (a) and Fig. 1 (b) respectively powder sintered front and back of nickel aluminum metal and composition analysis result. Can be seen that from Fig. 1 (a), before sintering, nickel aluminium powder is the medicine ball structure of nickel alclad, it can be seen that the nickel aluminium powder after sintering becomes the hollow ball structure that structure is single from Fig. 1 (b), and diffusion place mutually of nickel aluminium powder defines the gap of closing.
Fig. 2 (a) and Fig. 2 (b) respectively adopt spliced map and the partial enlarged drawing of the abnormal metallographic of the metal beehive sample that conventional polishing process obtains. Can be seen that from Fig. 2 (a), the surface adhesion of whole metallographic specimen the substantial amounts of nickel aluminum metal being cut, the nickel aluminum metal being cut in most of hole from Fig. 2 (b) it can be seen that in metallographic specimen is filled, and causes fict structure.
Fig. 3 (a) and Fig. 3 (b) is respectively for the same metal beehive sample in Fig. 2, adopt spliced map and the partial enlarged drawing of the nickel aluminum honeycomb metallographic that finishing method of the present invention obtains, can be seen that from Fig. 3 (a), the nickel aluminum metal being cut almost without adhesion on whole metallographic specimen surface, can be seen that from Fig. 3 (b), metallographic specimen has recovered original hole pattern, obtains real structure.
Claims (5)
1. the finishing method for hole enclosed type porous material metallographic specimen, it is characterised in that: described finishing method includes the following step carried out in order:
1) by analytically pure Cr2O3Powder, water and KBM401 lubricant adopt magnetic stirring apparatus to stir mixing at ambient temperature after being mixed in proportion, and are thus configured to the polishing fluid with lubrication and cleaning function;
2) by polishing cloth with above-mentioned polishing fluid moistening, the metal beehive metallographic specimen of milled of then fighting each other on automatic polishing machine is polished, and utilize watering can to continue to spray above-mentioned polishing fluid in polishing disk in polishing process, to remove the cut on metal beehive metallographic specimen surface, and metallographic specimen is carried out preliminary lubrication and cleaning;
3) polishing cloth more renewed, and with KBM401 lubricant by its moistening, then it is cleaned processing to the metal beehive metallographic specimen surface after above-mentioned removal cut using KBM401 lubricant as cleaning solution, cleaning process utilizes watering can continue to spray KBM401 lubricant in polishing disk, thus prepare structure real hole enclosed type porous metals honeycomb metallographic specimen.
2. the finishing method for hole enclosed type porous material metallographic specimen according to claim 1, it is characterised in that: in step 1) in, Cr in described polishing fluid2O3After the mass percent of powder, water and KBM401 lubricant, mixing, the rotating speed of magnetic stirring apparatus and mixing time are respectively as follows:
Cr2O3: 9��13%;
Water: 57��66%;
KBM401 lubricant: 25��30%;
Rotating speed: 200��300r/min
Mixing time: >=30min.
3. the finishing method for hole enclosed type porous material metallographic specimen according to claim 1, it is characterised in that: in step 2) in, the technological parameter of described polishing process is respectively as follows:
The rotating speed of automatic polishing machine: 135��150r/min;
Pressure is 17��22N;
Polishing time is 3��4min.
4. the finishing method for hole enclosed type porous material metallographic specimen according to claim 1, it is characterised in that: in step 3) in, the technological parameter of described cleaning process is respectively as follows:
The rotating speed of buffing machine is 190��210r/min;
Pressure is 7��11N;
Cleaning time is 1��1.5min.
5. the finishing method for hole enclosed type porous material metallographic specimen according to claim 1, it is characterised in that: in step 2) and step 3) in, described polishing cloth is down canvas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510967905.0A CN105628479A (en) | 2015-12-18 | 2015-12-18 | Polishing method aiming at metallographic specimen of of pore-closed type porous material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510967905.0A CN105628479A (en) | 2015-12-18 | 2015-12-18 | Polishing method aiming at metallographic specimen of of pore-closed type porous material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105628479A true CN105628479A (en) | 2016-06-01 |
Family
ID=56043618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510967905.0A Pending CN105628479A (en) | 2015-12-18 | 2015-12-18 | Polishing method aiming at metallographic specimen of of pore-closed type porous material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105628479A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109001064A (en) * | 2018-08-23 | 2018-12-14 | 江苏亨通光导新材料有限公司 | A kind of method of quantitative measurment and evaluation preform polishing effect |
| CN113092208A (en) * | 2021-04-02 | 2021-07-09 | 杨媛媛 | Preparation method of metallographic sample of metal honeycomb sintered body of aero-engine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101025391A (en) * | 2007-03-13 | 2007-08-29 | 北京科技大学 | Method for making super-low carbon steel gold-phase sample and displaying its tissue |
| CN101109677A (en) * | 2007-09-06 | 2008-01-23 | 北京科技大学 | Method for preparing stainless steel spot welding heat-affected zone metallic phase example |
| CN101183053A (en) * | 2007-12-04 | 2008-05-21 | 北京有色金属研究总院 | Preparation method of high fine aluminium-copper series alloy metallographical example |
| CN101806684A (en) * | 2010-03-22 | 2010-08-18 | 宁波博威合金材料股份有限公司 | Specimen preparation and organization exposure method of metallic phase of zinc and alloy thereof |
| CN103529002A (en) * | 2013-09-04 | 2014-01-22 | 航天材料及工艺研究所 | Observation method for microcracks and holes in carbon/carbon composite material |
-
2015
- 2015-12-18 CN CN201510967905.0A patent/CN105628479A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101025391A (en) * | 2007-03-13 | 2007-08-29 | 北京科技大学 | Method for making super-low carbon steel gold-phase sample and displaying its tissue |
| CN101109677A (en) * | 2007-09-06 | 2008-01-23 | 北京科技大学 | Method for preparing stainless steel spot welding heat-affected zone metallic phase example |
| CN101183053A (en) * | 2007-12-04 | 2008-05-21 | 北京有色金属研究总院 | Preparation method of high fine aluminium-copper series alloy metallographical example |
| CN101806684A (en) * | 2010-03-22 | 2010-08-18 | 宁波博威合金材料股份有限公司 | Specimen preparation and organization exposure method of metallic phase of zinc and alloy thereof |
| CN103529002A (en) * | 2013-09-04 | 2014-01-22 | 航天材料及工艺研究所 | Observation method for microcracks and holes in carbon/carbon composite material |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109001064A (en) * | 2018-08-23 | 2018-12-14 | 江苏亨通光导新材料有限公司 | A kind of method of quantitative measurment and evaluation preform polishing effect |
| CN113092208A (en) * | 2021-04-02 | 2021-07-09 | 杨媛媛 | Preparation method of metallographic sample of metal honeycomb sintered body of aero-engine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105839111A (en) | Mechanical polishing solution for preparing EBSD sample, preparation method and mechanical polishing method | |
| CN103792128B (en) | A kind of method of the biphase crystal boundary showing two phase stainless steel | |
| CN105880464B (en) | A kind of graphite mold casting method of large-scale thin-wall titanium alloy casting | |
| CN104513985A (en) | Nickel-chromium alloy metallographic corrosion solution and corrosion method | |
| CN108896339A (en) | The preparation method of metallographic specimen | |
| CN103335877B (en) | A kind of method preparing metal thin film metallographic structure sample | |
| CN104458511A (en) | Method for testing autstenitic grain size of steel bainite structure for nuclear pressure vessel | |
| CN102607916A (en) | Preparation method of silicon chip metallographic specimen | |
| CN102390977B (en) | Ceramic product repairing material and method | |
| CN104878389A (en) | Pure-nickel metallographic etchant and corroding method using same | |
| CN103993319A (en) | Corrosive agent and display method for macrostructure of aluminum and aluminum copper alloys | |
| CN105628479A (en) | Polishing method aiming at metallographic specimen of of pore-closed type porous material | |
| CN111761057A (en) | Method for improving density and component uniformity of selected area laser melting product | |
| CN105588747A (en) | Metallographic test corrodent for TB8 titanium alloy material and corrosion method thereof | |
| CN105092897B (en) | A kind of processing method of powder sample for ar-ion beam cutting | |
| CN103436886A (en) | Chemical polishing agent applicable to tower material polishing and use method | |
| CN103308355A (en) | Metallographic test sample preparation method of aluminum-based ceramic mould core and silicon-based ceramic mould core | |
| CN103529002B (en) | The observation procedure of micro-crack and hole in a kind of carbon/carbon compound material | |
| CN104006994A (en) | Method for displaying color metallographic tissues of pure aluminum | |
| CN105506638A (en) | Polishing liquid for metallographic analysis and preparation method and application method thereof | |
| CN112362437B (en) | Metallographic etching agent and metallographic structure display method | |
| CN106048672A (en) | Neutral cyanide-free brush electroplating silver plating solution and preparation process and use method thereof | |
| CN103543044A (en) | Preparation method for section shape analyzing sample of MEMS (micro electro mechanical systems) device | |
| CN104515698A (en) | Method for rapidly polishing polished section | |
| CN106501060A (en) | A kind of display packing of unleaded casting silizin macroscopic view metallographic structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160601 |