JPH02208539A - Indentation hardness test - Google Patents
Indentation hardness testInfo
- Publication number
- JPH02208539A JPH02208539A JP3043989A JP3043989A JPH02208539A JP H02208539 A JPH02208539 A JP H02208539A JP 3043989 A JP3043989 A JP 3043989A JP 3043989 A JP3043989 A JP 3043989A JP H02208539 A JPH02208539 A JP H02208539A
- Authority
- JP
- Japan
- Prior art keywords
- load
- indenter
- hardness
- indentation
- sample
- 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.)
- Granted
Links
- 238000007541 indentation hardness test Methods 0.000 title claims description 4
- 238000012360 testing method Methods 0.000 claims abstract description 18
- 230000003068 static effect Effects 0.000 claims abstract description 7
- 238000007373 indentation Methods 0.000 claims description 32
- 238000010998 test method Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 abstract description 10
- 238000005259 measurement Methods 0.000 abstract description 10
- 230000035515 penetration Effects 0.000 abstract description 3
- 230000002265 prevention Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 238000007542 hardness measurement Methods 0.000 description 6
- 230000003746 surface roughness Effects 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000013256 coordination polymer Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、圧子に試験荷重を負荷し、その時の圧子の試
料表面への押込深さから試料の硬さを求める試験方法に
関し、特に静的押込硬さを求めるに適した試験方法に関
する。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a test method in which a test load is applied to an indenter and the hardness of the sample is determined from the depth of penetration of the indenter into the sample surface. This article relates to a test method suitable for determining target indentation hardness.
［従来の技術］
従来の押込硬さ試験方法は、圧子と試料表面が接触した
点を零点とし、あらかじめ設定された荷重まで圧子に負
荷し、一定時間保持後試料表面に押し込まれた圧子の押
込深さを測定し、当該荷重と押込深さから試料硬度を算
出している。また、第３図に示すように、圧子を試料に
押し込んでいく際の荷重と押込深さを求めて得られる荷
重−押込深さ線図から、任、αに二組の荷重と押込深さ
（ｐ＋とり、、Ｐ２とＤ２）を読み取り試料硬度を算出
する試験法もある。[Prior art] In the conventional indentation hardness test method, the zero point is the point where the indenter and the sample surface come into contact, a preset load is applied to the indenter, the indenter is held for a certain period of time, and then the indenter is pressed into the sample surface. The depth is measured, and the sample hardness is calculated from the load and indentation depth. In addition, as shown in Figure 3, from the load-indentation depth diagram obtained by calculating the load and indentation depth when pushing the indenter into the sample, two sets of load and indentation depth are calculated for There is also a test method that reads (p+, P2 and D2) and calculates the sample hardness.
［発明が解決しようとする課題］
上記した従来法のうち、航者では圧子先端形状、試料表
面あらさの影響による測定誤差を生じやすいという問題
点があった。また、後者では、負荷中での動的な押込深
さの計測であるため、データが変動しやすく、動的な押
込硬さしか得られないという問題点があった。[Problems to be Solved by the Invention] Among the conventional methods described above, there is a problem in that the navigator is susceptible to measurement errors due to the influence of the indenter tip shape and sample surface roughness. In addition, in the latter method, since the indentation depth is measured dynamically under load, the data tends to fluctuate and there is a problem that only dynamic indentation hardness can be obtained.
そこで本発明は、試料表面あらさ等による測定誤差の発
生を防止し、安定した静的硬度を測定できる押込硬さ試
験方法を提供することを目的とする。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an indentation hardness testing method that can prevent measurement errors due to sample surface roughness and the like and can measure stable static hardness.
［課題を解決するための手段］
上記課題を解決するために、本発明は次のような構成を
採用した。[Means for Solving the Problems] In order to solve the above problems, the present invention employs the following configuration.
すなわち、本発明にかかる押込硬さ試験方法は、圧子に
加えられる試験荷重を次第に増加させながら、該試験荷
重によって試料表面に押込まれていく圧子の押込深さを
計測して試料の硬度を求める押込硬さ試験方法において
、あらかじめ設定された試験荷重に到達後、一定時間試
験荷重の増加を停止して設定試験荷重を保持し、この間
の圧子の押込深さを計測して静的押込硬さを求めること
を特徴としている。That is, in the indentation hardness testing method according to the present invention, the hardness of the sample is determined by gradually increasing the test load applied to the indenter and measuring the indentation depth of the indenter being pushed into the sample surface by the test load. In the indentation hardness test method, after reaching a preset test load, the increase in test load is stopped for a certain period of time and the set test load is maintained, and the indentation depth of the indenter during this period is measured to determine static indentation hardness. It is characterized by seeking
［作用］
圧子が試料表面に接触後、あらかじめ設定された試験荷
重に達するまで荷重を増加し、設定試験荷重到達後は、
塑性変形がほぼ停止する時間だけ荷重増加を停止して試
験荷重を保持し、この間に圧子が試料に押込まれる押込
深さを計測して硬度を求める。荷重増加を停止して押込
深さを測定するため、安定した測定値が得られ、静的硬
度の測定が可能となる。[Function] After the indenter contacts the sample surface, the load is increased until it reaches the preset test load, and after reaching the preset test load,
The test load is maintained by stopping the load increase until the plastic deformation almost stops, and the hardness is determined by measuring the depth at which the indenter is pushed into the sample during this time. Since the indentation depth is measured after stopping the load increase, stable measurement values can be obtained and static hardness can be measured.
［実施例］
第１図は本発明の試験方法が実施される押込硬さ試験装
置の構成を示すブロック図であり、負荷手段を構成する
電磁力発生手段によって圧子２を試料ｌに押し込み、圧
子２の変位量を差動トランス式変位検出器３で検出する
ようになっている。[Example] Fig. 1 is a block diagram showing the configuration of an indentation hardness testing apparatus in which the test method of the present invention is carried out. The displacement amount of 2 is detected by a differential transformer type displacement detector 3.
すなわち、ＣＰ Ｕ １５から荷重信号を出力し、Ｄ／
Ａ変換器６、電流増幅器５を介して電磁力発生手段４へ
負荷電流を供給し、電磁力発生手段４の駆動力によって
圧子−２を試料１へ押し込む。電磁力発生手段４に供給
される負荷電流および変位検出器３からの変位信号は電
圧値として読み出され、それぞれＶ／Ｆコンバータ８，
９で周波数信号に変換され、カウンタ１０．１１で計数
された僅■・変位データとしてＣＰＵｌ５．ＲＡＭ＋６
．ＲＯＭｌ７で構成される制御部に入力される。ＣＰＵ
ｌ５へ人力される荷重・変位データはＲＡＭ１７で記憶
されるとともに、演算処理されＩ １０ ＋８を介して
ＣＲＴ１９へ出力されて荷重と圧子の押込み深さとの関
係が記録される。That is, the load signal is output from the CPU 15, and the D/
A load current is supplied to the electromagnetic force generating means 4 via the A converter 6 and the current amplifier 5, and the indenter 2 is pushed into the sample 1 by the driving force of the electromagnetic force generating means 4. The load current supplied to the electromagnetic force generating means 4 and the displacement signal from the displacement detector 3 are read out as voltage values, and the V/F converter 8,
CPU15.9 is converted into a frequency signal and counted by counter 10.11 as small displacement data. RAM+6
．． The data is input to a control unit composed of ROM17. CPU
The load/displacement data manually applied to l5 is stored in the RAM 17, and is also processed and output to the CRT 19 via I 10 +8 to record the relationship between the load and the indentation depth of the indenter.
本発明にかかる試験方法は、上記のように構成された押
込硬さ試験装置において、試験開始後における荷重制御
に対し、あらかじめ測定点となる荷重値を数点設定して
おく。荷重値が設定荷重に達すると、電磁力発生手段４
への負荷電流の増加を停＋ＦＬ、て一定時間設定荷重値
を保持させる。設定荷重に達した時点から塑性変形がほ
ぼ完了するまでの一定時間（例えば１０〜１５秒）にお
ける圧子の押込深さを計測する。設定された各々の荷重
値について上記したように押込深さを計測し、このうち
二組の荷重と押込深さデータから試料の硬度を算出する
。In the test method according to the present invention, in the indentation hardness testing apparatus configured as described above, several load values are set in advance as measurement points for load control after the start of the test. When the load value reaches the set load, the electromagnetic force generating means 4
Stop the increase in load current to +FL and hold the set load value for a certain period of time. The indentation depth of the indenter is measured in a certain period of time (for example, 10 to 15 seconds) from the time when the set load is reached until the plastic deformation is almost completed. The indentation depth is measured as described above for each set load value, and the hardness of the sample is calculated from two sets of load and indentation depth data.
第２図は、本発明にかかる試験方法によって得られた荷
重−押込深さ特性を示す図であり、設定された荷重ｐ、
、ｐ２．ｐ、□において各々一定時間荷重増加を停止さ
せ、塑性変形がほぼ完了するのを待って押込深さが計測
されることを示す。FIG. 2 is a diagram showing the load-indentation depth characteristics obtained by the test method according to the present invention, and shows the set load p,
, p2. At p and □, the load increase is stopped for a certain period of time, and the indentation depth is measured after waiting for almost complete plastic deformation.
本発明にかかる試験方法は、上記のように荷重増加を停
止して、押込深さを計測するため、安定した計測値が１
：Ｉられることになる。また、設定値を一定時間保持し
、塑性変形がほぼ完了する間の押込深さを計測して１１
−られる二組の荷重と押込深さから硬度を算出するので
、試料の静的硬度を求めることができる。押込深さの計
測については、圧子が試料表面と接触する時点を基準と
しないので、かかる接触点の検出が不要になり、圧子先
端形状、試料表面あらさ等の影響による測定誤差が生じ
ない。The test method according to the present invention stops increasing the load as described above and measures the indentation depth, so a stable measurement value of 1
:I will be killed. In addition, hold the set value for a certain period of time and measure the indentation depth while the plastic deformation is almost complete.
Since the hardness is calculated from two sets of loads and indentation depths, the static hardness of the sample can be determined. The measurement of the indentation depth is not based on the point at which the indenter contacts the sample surface, so there is no need to detect such contact points, and measurement errors due to the influence of the indenter tip shape, sample surface roughness, etc. do not occur.
［発明の効果］
上記説明から明らかなように、本発明にかかる押込み硬
さ試験方法によりば、圧子と試料の接触点検出に伴う測
定誤差を生じず、安定した計測値が４７７られるととも
Ｋ、試料の静的硬度を求めることができるようになった
。[Effects of the Invention] As is clear from the above description, according to the indentation hardness testing method according to the present invention, stable measurement values can be obtained without causing measurement errors due to detection of contact points between the indenter and the sample. , it is now possible to determine the static hardness of a sample.
第１図は本発明の試験方法を実施する押込み硬さ試験装
置の構成を示すブロック図、第２図は本発明の試験方法
の実施によって得られる荷重−押込深さ特性を示す図、
第３図は従来法による荷重−押込深さ特性を示す図であ
る。
１・・・試料 ２・・・圧子
４・・・電磁力発生手段
３・・・変位検出器
＋５−ＣＰ Ｕ
特許出願人 株式会社 島律製作所
代理人 弁理士 菅 原 弘 志FIG. 1 is a block diagram showing the configuration of an indentation hardness testing device for implementing the test method of the present invention, and FIG. 2 is a diagram showing the load-indentation depth characteristics obtained by implementing the test method of the present invention.
FIG. 3 is a diagram showing load-indentation depth characteristics according to the conventional method. 1... Sample 2... Indenter 4... Electromagnetic force generating means 3... Displacement detector + 5-CP U Patent applicant: Shima Ritsu Seisakusho Co., Ltd. Agent Patent attorney: Hiroshi Sugawara
Claims (1)
ら、該試験荷重によって試料表面に押込まれていく圧子
の押込深さを計測して試料の硬度を求める押込硬さ試験
方法において、あらかじめ設定された試験荷重に到達後
、一定時間試験荷重の増加を停止して設定試験荷重を保
持し、この間の圧子の押込深さを計測して静的押込硬さ
を求めることを特徴とする押込硬さ試験方法。(1) In the indentation hardness test method, the hardness of the sample is determined by gradually increasing the test load applied to the indenter and measuring the indentation depth of the indenter being pushed into the sample surface by the test load. After reaching the set test load, the test load is stopped increasing for a certain period of time and the set test load is maintained, and the indentation depth of the indenter during this period is measured to determine the static indentation hardness. Test method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1030439A JPH06105215B2 (en) | 1989-02-09 | 1989-02-09 | Indentation hardness test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1030439A JPH06105215B2 (en) | 1989-02-09 | 1989-02-09 | Indentation hardness test method |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6864596A Division JPH08233713A (en) | 1996-03-25 | 1996-03-25 | Method for indentation hardness testing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02208539A true JPH02208539A (en) | 1990-08-20 |
| JPH06105215B2 JPH06105215B2 (en) | 1994-12-21 |
Family
ID=12303970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1030439A Expired - Fee Related JPH06105215B2 (en) | 1989-02-09 | 1989-02-09 | Indentation hardness test method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06105215B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008014736A (en) * | 2006-07-05 | 2008-01-24 | Shimadzu Corp | Hardness measuring device and hardness measuring method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55125432A (en) * | 1979-03-20 | 1980-09-27 | Nippon Steel Corp | Method and device for measuring rockwell hardness |
| JPS60114742A (en) * | 1983-11-28 | 1985-06-21 | Akira Nishihara | Hardness tester |
| JPS60196602A (en) * | 1984-03-08 | 1985-10-05 | ヘルム−ト・フイツシヤ−・ゲ−エムベ−ハ−・ウント・コンパニ・インステイテユ−ト・フユア・エレクトロニク・ウント・メステクニク | Device for absolute-measuring property of solid in nondestructive manner |
| JPS61167836A (en) * | 1985-01-16 | 1986-07-29 | ヘルム−ト・フイツシヤ−・ゲ−エムベ−ハ−・ウント・コンパニ・インステイテユ−ト・フユア・エレクトロニク・ウント・メステクニク | Device for measuring characteristic of solid substance and operating method thereof |
| JPH01237431A (en) * | 1988-03-18 | 1989-09-21 | Sonoike Seisakusho:Kk | Hardness measuring method in displacement measuring type hardness meter |
-
1989
- 1989-02-09 JP JP1030439A patent/JPH06105215B2/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55125432A (en) * | 1979-03-20 | 1980-09-27 | Nippon Steel Corp | Method and device for measuring rockwell hardness |
| JPS60114742A (en) * | 1983-11-28 | 1985-06-21 | Akira Nishihara | Hardness tester |
| JPS60196602A (en) * | 1984-03-08 | 1985-10-05 | ヘルム−ト・フイツシヤ−・ゲ−エムベ−ハ−・ウント・コンパニ・インステイテユ−ト・フユア・エレクトロニク・ウント・メステクニク | Device for absolute-measuring property of solid in nondestructive manner |
| JPS61167836A (en) * | 1985-01-16 | 1986-07-29 | ヘルム−ト・フイツシヤ−・ゲ−エムベ−ハ−・ウント・コンパニ・インステイテユ−ト・フユア・エレクトロニク・ウント・メステクニク | Device for measuring characteristic of solid substance and operating method thereof |
| JPH01237431A (en) * | 1988-03-18 | 1989-09-21 | Sonoike Seisakusho:Kk | Hardness measuring method in displacement measuring type hardness meter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008014736A (en) * | 2006-07-05 | 2008-01-24 | Shimadzu Corp | Hardness measuring device and hardness measuring method |
| JP4687589B2 (en) * | 2006-07-05 | 2011-05-25 | 株式会社島津製作所 | Hardness measuring apparatus and hardness measuring method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06105215B2 (en) | 1994-12-21 |
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