JPH0712956U - Vickers hardness tester with high measurement accuracy - Google Patents
Vickers hardness tester with high measurement accuracyInfo
- Publication number
- JPH0712956U JPH0712956U JP4162993U JP4162993U JPH0712956U JP H0712956 U JPH0712956 U JP H0712956U JP 4162993 U JP4162993 U JP 4162993U JP 4162993 U JP4162993 U JP 4162993U JP H0712956 U JPH0712956 U JP H0712956U
- Authority
- JP
- Japan
- Prior art keywords
- indentation
- hardness
- vickers hardness
- measurement accuracy
- vickers
- 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.)
- Withdrawn
Links
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
(57)【要約】
【目的】 ビッカース圧子による圧痕部の大きさを明確
に検出することができるビッカース硬度計を提供するこ
とを目的とする。
【構成】 ビッカース圧子による圧痕部を指向して、観
察用光に加え斜角光照射灯を併設して圧痕部に観察用光
とは別に、斜角光を照射する。
【効果】 前記圧痕部のエッジ部が鮮明になる。
(57) [Summary] [Purpose] It is an object to provide a Vickers hardness meter capable of clearly detecting the size of an indentation portion by a Vickers indenter. [Structure] In addition to the observation light, an oblique-angle light irradiation lamp is provided to direct the indentation portion by the Vickers indenter, and the oblique-angle light is emitted to the indentation portion separately from the observation light. [Effect] The edge of the indentation becomes clear.
Description
【0001】[0001]
本考案は種々の材料の硬さを測定するためのビッカース硬度計に関する。 The present invention relates to a Vickers hardness tester for measuring hardness of various materials.
【0002】[0002]
材料の硬さを調べる目的で行われるビッカース硬度試験は、硬さ測定面を必要 に応じてサンドペーパーか或いはアルミナ等による鏡面研磨、又は表面の加工歪 みを除くための化学および電解研磨等により平滑に研磨した後、適当な加重を圧 子によりその表面に加え、その結果つけられた圧痕の大きさをもって被測定物の 硬さを評価するのが一般的方法である。 The Vickers hardness test, which is carried out to check the hardness of the material, is performed by sanding the hardness measurement surface as needed, mirror polishing with alumina, etc., or by chemical and electrolytic polishing to remove processing strain on the surface. It is a common method to apply an appropriate weight to the surface with a pressure roller after smoothing, and to evaluate the hardness of the object to be measured by the size of the indentation made as a result.
【0003】[0003]
ところが、このような方法でつけられた圧痕は、被測定物によっては、圧痕の 周りに塑性変形による起伏が起こり、圧痕の大きさを正しく判定するのが難しく 、硬さの測定精度に問題がしばしば発生する。被測定物が硬い場合か、測定加重 が小さい場合のように、圧痕が小さい場合には特に測定精度に問題があった。 However, the indentation formed by such a method causes undulations due to plastic deformation around the indentation depending on the object to be measured, and it is difficult to correctly determine the size of the indentation, and there is a problem in hardness measurement accuracy. It often happens. There was a problem with the measurement accuracy especially when the indentation was small, such as when the measured object was hard or when the measurement load was small.
【0004】 そこで本考案はこのような問題点を解決し、信頼度の高い硬度試験を行うこと ができるビッカース硬度計を提供することを目的とする。Therefore, the present invention has an object to solve the above problems and provide a Vickers hardness meter capable of performing a hardness test with high reliability.
【0005】[0005]
上記問題点を解決するための本考案は、ビッカース圧子によりつけられた圧痕 部を、観察用光に加え圧痕の両側から斜角光により圧痕部を照射し、圧痕のエッ ジが正確に判定できるように、照射灯を新しく具備したビッカース硬度計である 。 The present invention for solving the above-mentioned problems can accurately determine the edge of the indentation by irradiating the indentation portion formed by the Vickers indenter with the oblique light from both sides of the indentation in addition to the observation light. As mentioned above, it is a Vickers hardness tester equipped with a new irradiation lamp.
【0006】[0006]
以下、本考案について詳細に説明する。 図2に示すように、現在一般に使用されているビッカース硬度試験機により、 被測定物1に施された圧痕2に、観察用光3に加え新しく取り付けられた照明灯 4から圧痕の両側に向けて斜角光5を当て、圧痕のエッジ部を鮮明に観察できる ようにする。照明灯については特に限定するものではないが、できるだけ照明光 がビーム状に細いことと、光源が圧痕の反対面を正確に照射出来るように光源の 方向が調節出来ることが望ましい。しかる後、圧痕は大きさを正確に測定される 。 Hereinafter, the present invention will be described in detail. As shown in Fig. 2, with a Vickers hardness tester that is commonly used at present, the indentation 2 made on the DUT 1 is directed to both sides of the indentation 2 from the newly installed illumination lamp 4 in addition to the observation light 3. The oblique angle light 5 is applied so that the edge of the indentation can be clearly observed. The illumination lamp is not particularly limited, but it is desirable that the illumination light be as thin as a beam and that the direction of the light source be adjustable so that the light source can accurately illuminate the opposite surface of the indentation. The indentation is then accurately measured in size.
【0007】 上記のような本考案は、圧痕の周りが塑性変形により変形しても、圧痕部がよ り強調して照らし出されることにからエッジ部が鮮明に観察され、圧痕の大きさ を正確に測定することができ、被測定物の硬さを精度良く求めることが出来る。 従って得られた試験結果の信頼度は極めて高くなる。このようにして求められた 硬度測定結果は、新しい材料の開発や、設備、工作機械等の設計をする上で、極 めて有用であることは明らかである。According to the present invention as described above, even if the surroundings of the indentation are deformed by plastic deformation, the indentation portion is illuminated more emphasized, so that the edge portion is clearly observed and the size of the indentation can be reduced. It is possible to measure accurately, and it is possible to accurately determine the hardness of the measured object. Therefore, the reliability of the test results obtained is extremely high. It is clear that the hardness measurement results obtained in this way are extremely useful for developing new materials and designing equipment and machine tools.
【0008】[0008]
次に、本考案の実施例について説明する。 低合金鋼材料の試験片(直径10mm×長さ75mm)を高温度に加熱処理(加熱 速度:5℃/秒、温度:950℃、加熱時間:60秒)し、水冷した。その時の 冷却過程の800〜500℃温度間の冷却速度と硬さの関係を図1にジョミニー 曲線で示した。なお、本考案の比較例として、現状硬度試験機により測定した硬 さを示した。すなわち、本考案の硬度試験結果は、現状試験機により測定した結 果に比べバラツキが極めて小さく、信頼度の高い測定結果を示す。このような結 果は、新しく取り付けられた斜角光による照明により圧痕のエッジが鮮明に観察 出来た効果によるものと判断される。 Next, an embodiment of the present invention will be described. A test piece (diameter 10 mm × length 75 mm) of a low alloy steel material was heat-treated at a high temperature (heating rate: 5 ° C./second, temperature: 950 ° C., heating time: 60 seconds) and cooled with water. The relationship between the cooling rate and the hardness between 800 and 500 ° C. during the cooling process at that time is shown by the Jominy curve in FIG. As a comparative example of the present invention, the hardness measured by the current hardness tester is shown. That is, the hardness test result of the present invention shows a highly reliable measurement result with very little variation as compared with the result measured by the current tester. It is considered that such a result is due to the effect that the edge of the indentation was clearly observed by the illumination with the newly installed oblique light.
【0009】[0009]
以上のように本考案は、硬度計に観察用光に加え圧痕の両側から新しい照明装 置を取り付け、圧痕部に斜角光を当てることにより圧子により付けられた圧痕が より強調して照らしだされることから、圧痕周辺の塑性変形による圧痕エッジの 不鮮明さが鮮明化され、その結果信頼度の高い試験結果を得ることが出来る。 As described above, according to the present invention, in addition to the observation light, a new illumination device is attached to the hardness meter from both sides of the indentation, and oblique angle light is applied to the indentation portion to illuminate the indentation made by the indenter more strongly As a result, the blurring of the indentation edge due to plastic deformation around the indentation becomes clear, and as a result, highly reliable test results can be obtained.
【図1】本考案の実施例を示すジョミニー曲線図であ
る。FIG. 1 is a Jominy curve diagram showing an embodiment of the present invention.
【図2】本考案の照明装置による照斜光の概略図であ
る。FIG. 2 is a schematic view of an illumination light by the lighting device of the present invention.
1 被測定物 2 圧痕 3 観察用光 4 照明灯 5 斜角光 1 DUT 2 Indentation 3 Observation light 4 Illumination light 5 Oblique light
Claims (1)
う場合のビッカース圧子による圧痕部を指向して、観察
用光に加え斜角光照射灯を併設したことを特徴とする、
硬さ測定精度の高いビッカース硬度計。1. An oblique light irradiation lamp is additionally provided in addition to the observation light by directing an indentation portion by a Vickers indenter when hardness is measured using a Vickers hardness meter.
Vickers hardness tester with high hardness measurement accuracy.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4162993U JPH0712956U (en) | 1993-07-29 | 1993-07-29 | Vickers hardness tester with high measurement accuracy |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4162993U JPH0712956U (en) | 1993-07-29 | 1993-07-29 | Vickers hardness tester with high measurement accuracy |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0712956U true JPH0712956U (en) | 1995-03-03 |
Family
ID=12613627
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4162993U Withdrawn JPH0712956U (en) | 1993-07-29 | 1993-07-29 | Vickers hardness tester with high measurement accuracy |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0712956U (en) |
-
1993
- 1993-07-29 JP JP4162993U patent/JPH0712956U/en not_active Withdrawn
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19971106 |