CN102042985A - Observation method of Ti-Ni alloy metallographic structure - Google Patents
Observation method of Ti-Ni alloy metallographic structure Download PDFInfo
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- CN102042985A CN102042985A CN 201010518846 CN201010518846A CN102042985A CN 102042985 A CN102042985 A CN 102042985A CN 201010518846 CN201010518846 CN 201010518846 CN 201010518846 A CN201010518846 A CN 201010518846A CN 102042985 A CN102042985 A CN 102042985A
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- 229910004337 Ti-Ni Inorganic materials 0.000 title claims abstract description 29
- 229910011209 Ti—Ni Inorganic materials 0.000 title claims abstract description 29
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 29
- 239000000956 alloy Substances 0.000 title claims abstract description 29
- KHYBPSFKEHXSLX-UHFFFAOYSA-N iminotitanium Chemical compound [Ti]=N KHYBPSFKEHXSLX-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000003754 machining Methods 0.000 claims abstract description 6
- 239000000243 solution Substances 0.000 claims description 21
- 230000003287 optical effect Effects 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- 238000005498 polishing Methods 0.000 abstract description 2
- 238000005530 etching Methods 0.000 abstract 2
- 231100001261 hazardous Toxicity 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The invention discloses an observation method of a Ti-Ni alloy metallographic structure, comprising the following five steps: 1. machining a metallographic observation plane; 2. grinding; 3. mechanically polishing; 4. etching; and 5. observing. The surface of a mechanically-polished sample is etched by an etchant solution, avoids forming an oxidation film as the paraboloid is oxidized, and avoids generating a pseudo structure because of etching. The observation method in the invention is easy to operate, in non-hazardous, can clearly show the Ti-Ni alloy metallographic structure and does not need any special equipment.
Description
Technical field
The invention belongs to material surface structure view survey technology field, be specifically related to a kind of observation procedure of Ti-Ni alloy metallographic structure.
Background technology
Ti-Ni alloy is to use wider marmem at present.Its expansion and contraction is more than 20%, reach fatigue lifetime 107 times, damping characteristic is higher 10 times than common spring, and its corrosion resistance is better than best medical stainless steel at present, therefore can satisfy the application demand of all kinds of engineerings and medical science, be a kind of very outstanding functional material.In order to study the performance of Ti-Ni alloy, need to observe the microstructure and the grain size of Ti-Ni alloy, whether even to determine crystal grain, thus improve every technology.In existing Ti-Ni alloy document, because the problem of preparation method and erosion is difficult to obtain microstructure clearly.Be difficult for polishing during as metallographic sample preparation, and be difficult for showing microstructure during chemical erosion, and very easily cause pseudo-tissue.These problems all make us can not obtain desirable Ti-Ni alloy metallographic structure.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of easy operating at above-mentioned the deficiencies in the prior art, and the metallographic structure of Ti-Ni alloy can be clearly observed out in nonhazardous, does not need the observation procedure of the Ti-Ni alloy metallographic structure of any specific installation.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of observation procedure of Ti-Ni alloy metallographic structure is characterized in that this method may further comprise the steps:
(1) the Ti-Ni alloy sample machine is processed the metallographic plane of vision;
(2) the metallographic plane of vision with machining in the step (1) adopts metallographic waterproof abrasive paper to grind on muller, and the sand grains on the metallographic plane of vision is washed in the grinding backlash off;
(3) the metallographic plane of vision through grinding post-flush drop grain in the step (2) is placed on the buffing machine, adopt Cr
2O
3Solution or particle diameter are that the Buddha's warrior attendant powder of 2.5 μ m carries out mechanical buffing as brilliant polish;
(4) with the metallographic plane of vision after mechanical buffing in the etchant solution etch step (3); Described etchant solution is H
2SO
4, HNO
3, HF and H
2The mixed solution of O; The volume ratio of each component is H in the described etchant solution
2SO
4: HNO
3: HF: H
2O=1～2: 1～1.5: 1～1.5: 0.5～1;
(5) the metallographic plane of vision through etch in the step (4) is carried out metallographic structure observation with optical microscope.
The system of grinding described in the above-mentioned steps (2) is: be 150 with granularity successively
#, 700
#, 1000
#Metallographic waterproof abrasive paper grind step by step, grind direction when grit paper grinds and rotate 90 ° changing each time, to guarantee the eliminating last vestige that grinds fully.
H described in the above-mentioned steps (4)
2SO
4Mass concentration be 95%～98%, described HNO
3Mass concentration be 65%～68%, the mass concentration of described HF is not less than 40%.
The time of etch described in the above-mentioned steps (4) is 2s～6s.
The present invention compared with prior art has the following advantages: the present invention adopts the sample surfaces after the etchant solution etch mechanical buffing, has avoided sample to throw the face oxidation and has formed oxide film, has avoided simultaneously producing pseudo-tissue through etch.The present invention has easy operating, and the metallographic structure of Ti-Ni alloy can be clearly observed out in nonhazardous, does not need the advantage of any specific installation.
Description of drawings
Fig. 1 is the Ti-Ni alloy metallographic structure figure of the embodiment of the invention 1.
Fig. 2 is the Ti-Ni alloy metallographic structure figure of the embodiment of the invention 2.
Fig. 3 is the Ti-Ni alloy metallographic structure figure of the embodiment of the invention 3.
Embodiment
The present invention will be further described below in conjunction with embodiment.
Embodiment 1
(1) the Ti-Ni alloy sample machine is processed the metallographic plane of vision;
(2) the metallographic plane of vision with machining is 150 with granularity on muller successively
#, 700
#, 1000
#Metallographic waterproof abrasive paper grind step by step, grind direction when grit paper grinds and rotate 90 ° changing each time, to guarantee the eliminating last vestige that grinds fully, grind backlash and wash sand grains on the metallographic plane of vision off;
(3) the metallographic plane of vision through grinding post-flush drop grain is placed on the buffing machine, adopt Cr
2O
3Solution carries out mechanical buffing as brilliant polish;
(4) the employing mass concentration is 95% H
2SO
4, mass concentration is 65% HNO
3, mass concentration is 45% HF and water preparation etchant solution, with the metallographic plane of vision 2s after mechanical buffing in the etchant solution etch step (3), the volume ratio of each component is 1.5: 1.2: 1.2 in the described etchant solution: 0.8;
(5) the metallographic plane of vision through etch is carried out metallographic structure observation with optical microscope under 100 times of enlargement factors.
According to Ti-Ni alloy metallographic structure figure such as Fig. 1 that present embodiment observes, the clear picture that observes.
Embodiment 2
(1) the Ti-Ni alloy sample machine is processed the metallographic plane of vision;
(2) the metallographic plane of vision with machining is 150 with granularity on muller successively
#, 700
#, 1000
#Metallographic waterproof abrasive paper grind step by step, grind direction when grit paper grinds and rotate 90 ° changing each time, to guarantee the eliminating last vestige that grinds fully, grind backlash and wash sand grains on the metallographic plane of vision off;
(3) the metallographic plane of vision through grinding post-flush drop grain is placed on the buffing machine, the employing particle diameter is that the Buddha's warrior attendant powder of 2.5 μ m carries out mechanical buffing as brilliant polish;
(4) the employing mass concentration is 98% H
2SO
4, mass concentration is 66.5% HNO
3, mass concentration is 50% HF and water preparation etchant solution, with the metallographic plane of vision 4s after mechanical buffing in the etchant solution etch step (3), the volume ratio of each component is 2: 1.5: 1.5 in the described etchant solution: 0.5;
(5) the metallographic plane of vision through etch is carried out metallographic structure observation with optical microscope under 100 times of enlargement factors.
According to Ti-Ni alloy metallographic structure figure such as Fig. 2 that present embodiment observes, the clear picture that observes.
Embodiment 3
(1) the Ti-Ni alloy sample machine is processed the metallographic plane of vision;
(2) the metallographic plane of vision with machining is 150 with granularity on muller successively
#, 700
#, 1000
#Metallographic waterproof abrasive paper grind step by step, grind direction when grit paper grinds and rotate 90 ° changing each time, to guarantee the eliminating last vestige that grinds fully, grind backlash and wash sand grains on the metallographic plane of vision off;
(3) the metallographic plane of vision through grinding post-flush drop grain is placed on the buffing machine, adopt Cr
2O
3Solution carries out mechanical buffing as brilliant polish;
(4) the employing mass concentration is 96.5% H
2SO
4, mass concentration is 65% HNO
3, mass concentration is 40% HF and water preparation etchant solution, with the metallographic plane of vision 6s after mechanical buffing in the etchant solution etch step (3), the volume ratio of each component is 1: 1: 1 in the described etchant solution: 1;
(5) the metallographic plane of vision through etch is carried out metallographic structure observation with optical microscope under 100 times of enlargement factors.
According to Ti-Ni alloy metallographic structure figure such as Fig. 3 that present embodiment observes, the clear picture that observes.
Claims (4)
1. the observation procedure of a Ti-Ni alloy metallographic structure is characterized in that, this method may further comprise the steps:
(1) the Ti-Ni alloy sample machine is processed the metallographic plane of vision;
(2) the metallographic plane of vision with machining in the step (1) adopts metallographic waterproof abrasive paper to grind on muller, and the sand grains on the metallographic plane of vision is washed in the grinding backlash off;
(3) the metallographic plane of vision through grinding post-flush drop grain in the step (2) is placed on the buffing machine, adopt Cr
2O
3Solution or particle diameter are that the Buddha's warrior attendant powder of 2.5 μ m carries out mechanical buffing as brilliant polish;
(4) with the metallographic plane of vision after mechanical buffing in the etchant solution etch step (3); Described etchant solution is H
2SO
4, HNO
3, HF and H
2The mixed solution of O; The volume ratio of each component is H in the described etchant solution
2SO
4: HNO
3: HF: H
2O=1～2: 1～1.5: 1～1.5: 0.5～1;
(5) the metallographic plane of vision through etch in the step (4) is carried out metallographic structure observation with optical microscope.
2. the observation procedure of a kind of Ti-Ni alloy metallographic structure according to claim 1 is characterized in that, the system of grinding described in the step (2) is: be 150 with granularity successively
#, 700
#, 1000
#Metallographic waterproof abrasive paper grind step by step, grind direction when grit paper grinds and rotate 90 ° changing each time, to guarantee the eliminating last vestige that grinds fully.
3. the observation procedure of a kind of Ti-Ni alloy metallographic structure according to claim 1 is characterized in that, H described in the step (4)
2SO
4Mass concentration be 95%～98%, described HNO
3Mass concentration be 65%～68%, the mass concentration of described HF is not less than 40%.
4. the observation procedure of a kind of Ti-Ni alloy metallographic structure according to claim 1 is characterized in that, the time of etch described in the step (4) is 2s～6s.
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|---|---|---|---|
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| CN102042985B CN102042985B (en) | 2012-02-01 |
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| CN102323119A (en) * | 2011-05-25 | 2012-01-18 | 武汉钢铁(集团)公司 | Method for preparing rust layer sample for being observed by scanning electron microscope |
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| CN102419275A (en) * | 2011-08-12 | 2012-04-18 | 西部金属材料股份有限公司 | Method for observing metallographic structure of molybdenum-niobium alloy |
| CN102494933A (en) * | 2011-11-28 | 2012-06-13 | 山东大学 | Corrosive for showing white layer of processed surface of nickel-base superalloy as well as preparation method and applications thereof |
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| CN103940747A (en) * | 2014-05-12 | 2014-07-23 | 西北有色金属研究院 | Method for observing TA7 titanium alloy metallographic structure |
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