JPH07120378A - Testing method for adhesion property of film - Google Patents
Testing method for adhesion property of filmInfo
- Publication number
- JPH07120378A JPH07120378A JP26369293A JP26369293A JPH07120378A JP H07120378 A JPH07120378 A JP H07120378A JP 26369293 A JP26369293 A JP 26369293A JP 26369293 A JP26369293 A JP 26369293A JP H07120378 A JPH07120378 A JP H07120378A
- Authority
- JP
- Japan
- Prior art keywords
- film
- steel ball
- test
- adhesion
- coating
- 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
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、めっき層,溶射層など
の皮膜をもつ被試験物の、皮膜の母材への密着性を定量
的に評価するための皮膜密着性試験方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating adhesion test method for quantitatively evaluating the adhesion of a test object having a coating such as a plating layer and a thermal spray layer to the base material of the coating.
【0002】[0002]
【従来の技術】めっき層や溶射層などの皮膜の母材への
密着性を評価するための試験方法として、例えば板状の
試験片を治具で押し曲げる曲げ試験方法や板状の試験片
にハンマで衝撃を与える打撃試験方法(JIS H8661-196
1)、試験片に碁盤目を刻み粘着テープを貼り付けて引
き剥がす引き剥がし試験方法(JIS H8305-1982)、加熱
・空冷処理を繰り返す加熱剥離試験方法(JIS H8664-19
77)などが知られている。しかしこれらの試験方法で
は、皮膜の密着性を定量的に評価することが困難であ
る。2. Description of the Related Art As a test method for evaluating the adhesion of a coating such as a plating layer or a sprayed layer to a base material, for example, a bending test method of pushing a plate-shaped test piece with a jig or a plate-shaped test piece Impact test method (JIS H8661-196)
1), Peel test method (JIS H8305-1982) in which a grid is cut on the test piece and adhesive tape is affixed and peeled off, and heat peel test method (JIS H8664-19) that repeats heating and cooling.
77) are known. However, with these test methods, it is difficult to quantitatively evaluate the adhesion of the coating.
【0003】また一対の板状の試験片の皮膜表面どうし
を接着し左右に引き剥がす密着力試験方法(JIS H8664-
1997,特開平2-47537 号公報)、球状のショット粒体で
ブラスト処理する方法(特開平5-107179号公報,特開平
3-108636号公報)などの試験方法も知られている。これ
らの方法によれば、皮膜密着性を定量的に評価すること
ができる。Also, an adhesion test method for adhering the film surfaces of a pair of plate-shaped test pieces to each other and peeling them off to the left and right (JIS H8664-
1997, Japanese Unexamined Patent Publication No. 2-47537), a method of blasting with spherical shot particles (Japanese Unexamined Patent Publication No. 5-107179, Japanese Unexamined Patent Publication No.
Test methods such as JP-A 3-108636) are also known. According to these methods, the film adhesion can be quantitatively evaluated.
【0004】[0004]
【発明が解決しようとする課題】ところが上記した従来
の試験方法では、試験片の形状が規定された破壊検査で
ある。そのため実際の部品を試験することが困難であっ
て試験片を作製しなければならず、その工数が多大とな
るという不具合がある。また試験装置が大型で高価とな
る場合も多く、コスト面での不具合もある。However, the conventional test method described above is a destructive inspection in which the shape of the test piece is defined. Therefore, it is difficult to test an actual component, and a test piece has to be manufactured, resulting in a large number of man-hours. In addition, the test apparatus is often large and expensive, and there is a cost problem.
【0005】本発明はこのような事情に鑑みてなされた
ものであり、簡便であって実際の部品についても試験で
き、しかも定量的な評価を可能とすることを目的とす
る。The present invention has been made in view of such circumstances, and it is an object of the present invention to be simple, to test actual parts, and to enable quantitative evaluation.
【0006】[0006]
【課題を解決するための手段】上記課題を解決する本発
明の皮膜密着性試験方法は、母材と母材表面に形成され
た皮膜とからなる被試験物の皮膜の母材への密着性を試
験する方法であって、被試験物の皮膜表面上で所定径の
球体又は円柱体を所定荷重で転動させることを特徴とす
る。[Means for Solving the Problems] The film adhesion test method of the present invention for solving the above-mentioned problems is an adhesion property of a film of an object to be tested, which is composed of a base material and a film formed on the surface of the base material, to the base material. Is a method of testing a spherical body or a cylindrical body having a predetermined diameter on a surface of a film of a test object under a predetermined load.
【0007】[0007]
【作用】本発明の皮膜密着性試験方法では、図1に示す
ように母材10と母材10表面に形成された皮膜11と
からなる被試験物1表面に、球体などの半径rの圧子2
を所定荷重Pで転動させるものである。これによりr及
びPが所定条件の場合に、皮膜11が母材10から剥離
して界面剥離12が生じる。In the coating adhesion test method of the present invention, as shown in FIG. 1, an indenter having a radius r such as a sphere is formed on the surface of the DUT 1 including the base material 10 and the coating 11 formed on the surface of the base material 10. Two
Is to be rolled with a predetermined load P. Thereby, when r and P are in a predetermined condition, the film 11 is separated from the base material 10 and the interface separation 12 occurs.
【0008】平面上に半径rの球を荷重Pで接触させた
場合を模式的に図2に示す。その接触面の半径をaとす
ると、a,r,Pの間には〔数1〕式に示す関係があ
る。FIG. 2 schematically shows a case where a sphere having a radius r is brought into contact with a plane with a load P. Assuming that the radius of the contact surface is a, there is a relationship among a, r, and P as shown in [Equation 1].
【0009】[0009]
【数1】 [Equation 1]
【0010】また接触面中心に生じる最大圧力をP0 と
すると、P0 ,r,Pの間には〔数2〕式に示す関係が
ある。[0010] When the maximum pressure occurring in the contact surface center and P 0, P 0, r, relationship shown in expression (2) expression between P.
【0011】[0011]
【数2】 [Equation 2]
【0012】なお、E1 及びE2 はヤング率、ν1 及び
ν2 はポアソン比であり添字1、2はそれぞれ被試験物
と球体の材料特性を示す。そして接触面下においては深
さ方向に剪断応力の分布が生じ、Hertz の式より深さz
の位置における主剪断応力τ1 は〔数3〕式で表され
る。E 1 and E 2 are Young's moduli, ν 1 and ν 2 are Poisson's ratios, and subscripts 1 and 2 indicate the material characteristics of the object under test and the sphere, respectively. The distribution of shear stress occurs in the depth direction below the contact surface, and the depth z is calculated from Hertz's equation.
The principal shear stress τ 1 at the position of is represented by the formula [3].
【0013】[0013]
【数3】 [Equation 3]
【0014】したがって〔数3〕式より、例えば最大剪
断応力τmax は、ν=0.3 ,z=0.47aの時にτmax =
0.31Pと計算される。そして上式より、剪断応力τは
〔数4〕式のように(P/r2 )1/3 に比例することが
明らかとなった。[0014] Thus from Formula 3 wherein for example, a maximum shear stress tau max is, [nu = 0.3, when z = 0.47a τ max =
Calculated as 0.31P. And from the above equation, it became clear that the shear stress τ is proportional to (P / r 2 ) 1/3 as in the equation [4].
【0015】[0015]
【数4】 [Equation 4]
【0016】そこで本発明ではこの理論を皮膜をもつ部
材に適用し、皮膜表面上で所定半径rの球を所定荷重P
で転動させ、皮膜の膜厚t方向に剪断応力を発生させ
る。ここで発生する剪断応力は〔数4〕式から一義的に
決まる。したがって例えば、予め剪断強度が明らかな皮
膜について剥離が生じるPとrの条件を求め、それに基
づいて図3に示すような検量線を作成しておく。そして
本発明の試験方法を用い、前記で求められたPとrの所
定条件で試験した被試験物の皮膜の剥離の有無を調査す
ることで、皮膜の密着強度を定量的に評価することがで
きる。Therefore, in the present invention, this theory is applied to a member having a film, and a sphere having a predetermined radius r is applied on the surface of the film with a predetermined load P.
To generate shear stress in the film thickness t direction. The shear stress generated here is uniquely determined from the equation (4). Therefore, for example, the conditions of P and r at which peeling occurs in a film having a clear shear strength are obtained in advance, and a calibration curve as shown in FIG. 3 is created based on the conditions. Then, by using the test method of the present invention, it is possible to quantitatively evaluate the adhesion strength of the coating by examining the presence or absence of peeling of the coating of the test object tested under the predetermined conditions of P and r obtained above. it can.
【0017】なお、球の代わりに半径rの円柱を用いる
場合は、円柱の長さをlとすると、接触面の半径をaと
r,P,lの間には〔数5〕式に示す関係がある。When a cylinder having a radius r is used in place of the sphere, the radius of the contact surface is given by the formula [5] between a and r, P, l, where the length of the cylinder is l. I have a relationship.
【0018】[0018]
【数5】 [Equation 5]
【0019】また接触面中心に生じる最大圧力P0 と
r,P,lの間には〔数6〕式に示す関係がある。There is a relationship between the maximum pressure P 0 generated at the center of the contact surface and r, P, l as shown in [Equation 6].
【0020】[0020]
【数6】 [Equation 6]
【0021】したがって例えばν=0.3 とすると、z=
0.786 aの時にτmax =0.301 Pと計算され、円柱の場
合でも球と同様に剪断応力はr,P及びlに対して一義
的に決まり、密着強度を定量的に評価することができ
る。Therefore, for example, if ν = 0.3, z =
When 0.786 a, τ max = 0.301 P is calculated, and even in the case of a cylinder, the shear stress is uniquely determined for r, P and l like the sphere, and the adhesion strength can be quantitatively evaluated.
【0022】[0022]
【実施例】以下、実施例により具体的に説明する。図5
に本実施例で用いた試験装置を示す。この試験装置3
は、ガイドラック30と、ガイドラック30にガイドラ
ック30に沿って移動自在に保持されたプレート31
と、プレート31に固定された油圧シリンダ装置32及
び超音波探傷子33とから構成されている。EXAMPLES The present invention will be specifically described below with reference to examples. Figure 5
The test apparatus used in this example is shown in FIG. This test equipment 3
Is a guide rack 30 and a plate 31 movably held on the guide rack 30 along the guide rack 30.
And an ultrasonic flaw detector 33 and a hydraulic cylinder device 32 fixed to the plate 31.
【0023】油圧シリンダ装置32のピストン先端には
SVJ2製の鋼球2が保持され、被試験物1の皮膜11
を加圧可能となっている。その加圧力は、圧力調整器3
4で調整可能である。また超音波探傷子33の信号はア
ンプ35で増幅されて出力され、母材10と皮膜11の
界面の剥離の有無を判定可能となっている。なお、本実
施例では鋼製の球2を用いているが、その材質は被試験
物の材質に応じて適宜選定することができる。A steel ball 2 made of SVJ2 is held on the tip of the piston of the hydraulic cylinder device 32, and the film 11 of the DUT 1 is held.
Can be pressurized. The applied pressure is the pressure regulator 3
Adjustable with 4. Further, the signal of the ultrasonic flaw detector 33 is amplified and output by the amplifier 35, and it is possible to determine whether or not the interface between the base material 10 and the film 11 is separated. Although the steel ball 2 is used in this embodiment, the material thereof can be appropriately selected according to the material of the test object.
【0024】この試験装置3では、被試験物1がガイド
ラック30と平行に置かれ、油圧シリンダ装置32が鋼
球2を所定の圧力で皮膜11表面に押し付ける。そして
プレート31が図2の右方向へ移動すると、鋼球2は皮
膜11を加圧したまま転動し、加圧面は超音波探傷子3
3で剥離の有無が検出される。なおこの試験装置では、
鋼球2と超音波探傷子33の間隔は極く小さいため、そ
の間隔以上の平面部をもつものであれば板状の被試験物
に限定されず用いることができる。またガイドラック3
0の形状を被試験物の表面形状に沿う形状とすれば、被
試験物の形状は制限されない。 <予備実験>S45C鋼素材の表面にブラスト処理を行
い、表面粗さ40μmRzとした後、HVOF(Hig
h Velocity Oxygen Fuel)溶射
によりNi皮膜を膜厚0.3mmで形成した。ここで溶
射時の素材の温度条件を変化させ、素材を水冷したも
の、素材を加熱したもの、素材の加熱・冷却無しのもの
の3水準の条件で溶射した試験片を作製した。In this test apparatus 3, the DUT 1 is placed parallel to the guide rack 30, and the hydraulic cylinder device 32 presses the steel ball 2 against the surface of the film 11 with a predetermined pressure. When the plate 31 moves to the right in FIG. 2, the steel ball 2 rolls while pressing the coating 11, and the pressing surface has the ultrasonic flaw detector 3
In 3, the presence or absence of peeling is detected. In this test device,
Since the distance between the steel ball 2 and the ultrasonic flaw detector 33 is extremely small, any material having a flat surface portion equal to or larger than the distance can be used without being limited to a plate-shaped test object. Also guide rack 3
The shape of the DUT is not limited as long as the shape of 0 corresponds to the surface shape of the DUT. <Preliminary Experiment> The surface of the S45C steel material was blasted to a surface roughness of 40 μmRz, and then HVOF (High
A Ni coating having a thickness of 0.3 mm was formed by thermal spraying of Velocity Oxygen Fuel. Here, the temperature conditions of the material at the time of thermal spraying were changed, and the thermal sprayed test piece was prepared under three levels of conditions: water cooled material, heated material, and no heating / cooling of the material.
【0025】それぞれの試験片について、図5に示す剪
断治具を用いて皮膜剪断強度を測定した。結果を表1に
示す。For each test piece, the film shear strength was measured using the shearing jig shown in FIG. The results are shown in Table 1.
【0026】[0026]
【表1】 なお、図5に示す剪断治具6は、取付部60及びシリン
ダ孔61をもつ基台62と、シリンダ孔61に移動可能
に保持され押圧突起63aをもつピストン部63と、ピ
ストン部63を前進させる押し出し部64と、ポンチ6
5と、ポンチ65を案内するガイド孔66とをもつ。[Table 1] The shearing jig 6 shown in FIG. 5 has a base 62 having a mounting portion 60 and a cylinder hole 61, a piston portion 63 movably held in the cylinder hole 61 and having a pressing protrusion 63a, and a piston portion 63 Extruding section 64 and punch 6
5 and a guide hole 66 for guiding the punch 65.
【0027】この剪断治具6を用い、以下のように皮膜
剪断強度を測定した。先ず試験片1を取付部60に据え
付け、押し出し部64で皮膜11の位置を調整して、ポ
ンチ65の先端部65aを皮膜11に押し当てて、皮膜
11を母材10から剥離させた。そして皮膜11が剥離
した際のポンチ65の押し込み力をPとし、皮膜11の
断面積をSとしたとき、P/Sを算出して皮膜剪断強度
とした。 <試験条件選定>次に、図4に示した試験装置を用い、
鋼球2の半径rと加圧力Pの値を種々変化させながら、
皮膜剪断強度が50MPaの試験片を用いて皮膜11に
界面剥離が発生する条件を測定した。その結果、半径r
=25.4mmの鋼球2を用い、8kg以上の荷重で加圧
することで界面剥離が発生することが明らかとなった。Using this shearing jig 6, the shear strength of the film was measured as follows. First, the test piece 1 was installed on the mounting portion 60, the position of the coating film 11 was adjusted by the extrusion portion 64, and the tip end portion 65a of the punch 65 was pressed against the coating film 11 to separate the coating film 11 from the base material 10. Then, when the pushing force of the punch 65 when the film 11 was peeled off was P and the cross-sectional area of the film 11 was S, P / S was calculated to be the film shear strength. <Selection of test conditions> Next, using the test apparatus shown in FIG.
While changing the values of the radius r of the steel ball 2 and the pressing force P,
The conditions under which interfacial peeling occurred in the film 11 were measured using a test piece having a film shear strength of 50 MPa. As a result, the radius r
It was revealed that interfacial peeling occurs when a steel ball 2 of 25.4 mm is used and pressure is applied with a load of 8 kg or more.
【0028】また、半径r=25.4mmの鋼球2を用
い、8kg以上の荷重で加圧する同じ条件で皮膜剪断強
度が30MPaと80MPaの試験片をそれぞれ試験し
たところ、皮膜剪断強度が30MPaの試験片では皮膜
に界面剥離が発生したが、皮膜剪断強度が80MPaの
試験片では皮膜に界面剥離が生じなかった。すなわち、
半径r=25.4mmの鋼球2を8kg未満の荷重で加圧
しながら転動させることにより、界面剥離の有無で皮膜
の皮膜剪断強度が50MPa未満であるか50MPa以
上であるかを判定することができる。Further, using steel balls 2 having a radius r = 25.4 mm, the test pieces having a coating shear strength of 30 MPa and 80 MPa were tested under the same conditions of pressing with a load of 8 kg or more. Interfacial peeling occurred in the coating of the test piece, but interfacial peeling did not occur in the coating of the test piece having a coating shear strength of 80 MPa. That is,
To determine whether the film shear strength of the film is less than 50 MPa or 50 MPa or more by rolling the steel ball 2 having a radius r = 25.4 mm while applying a load of less than 8 kg, with or without interfacial peeling. You can
【0029】[0029]
【発明の効果】すなわち本発明の皮膜密着性試験方法に
よれば、球体又は円柱体を被試験物表面で転動させるだ
けであるので、特別な試験片を作製する必要がなく工数
を大幅に低減することができる。また非破壊検査である
ため、実際の部品をそのまま試験に供することができ
る。That is, according to the film adhesion test method of the present invention, since a sphere or a cylinder is simply rolled on the surface of the object to be tested, it is not necessary to prepare a special test piece, and the number of steps can be greatly increased. It can be reduced. Moreover, since it is a non-destructive inspection, the actual parts can be directly subjected to the test.
【0030】そして本発明の試験方法により密着性を定
量的に評価することが可能となるため、評価の精度が格
段に向上しデータの細かな解析が可能となる。Since the adhesion can be quantitatively evaluated by the test method of the present invention, the accuracy of the evaluation is remarkably improved and the data can be finely analyzed.
【図1】本発明の試験方法の説明図である。FIG. 1 is an explanatory diagram of a test method of the present invention.
【図2】本発明の試験方法の作用の模式的説明図であ
る。FIG. 2 is a schematic explanatory view of the action of the test method of the present invention.
【図3】本発明の試験データから評価を行うのに用いる
検量線の一例を示すグラフである。FIG. 3 is a graph showing an example of a calibration curve used for evaluation from test data of the present invention.
【図4】本発明の一実施例で用いた試験装置の一部断面
で示す正面図である。FIG. 4 is a front view showing a partial cross section of a test apparatus used in one example of the present invention.
【図5】本発明の一実施例で用いた剪断治具の断面図で
ある。FIG. 5 is a cross-sectional view of a shearing jig used in an example of the present invention.
1:被試験物 2:鋼球
3:試験装置 10:母材 11:皮膜 1
2:界面剥離 32:油圧シリンダ装置 33:超音波探傷子1: DUT 2: Steel ball
3: Testing device 10: Base material 11: Film 1
2: Interface peeling 32: Hydraulic cylinder device 33: Ultrasonic flaw detector
Claims (1)
らなる被試験物の該皮膜の該母材への密着性を試験する
方法であって、 前記被試験物の前記皮膜表面上で所定径の球体又は円柱
体を所定荷重で転動させることを特徴とする皮膜密着性
試験方法。1. A method for testing the adhesion of a coating of an object to be tested, which comprises a base material and a coating formed on the surface of the base material, to the base material, wherein the coating surface of the object to be tested. A coating adhesion test method characterized by rolling a sphere or a cylinder having a predetermined diameter under a predetermined load.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26369293A JPH07120378A (en) | 1993-10-21 | 1993-10-21 | Testing method for adhesion property of film |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26369293A JPH07120378A (en) | 1993-10-21 | 1993-10-21 | Testing method for adhesion property of film |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH07120378A true JPH07120378A (en) | 1995-05-12 |
Family
ID=17393016
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP26369293A Pending JPH07120378A (en) | 1993-10-21 | 1993-10-21 | Testing method for adhesion property of film |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH07120378A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0292551U (en) * | 1988-12-28 | 1990-07-23 | ||
CN100414282C (en) * | 2003-01-09 | 2008-08-27 | 胡长顺 | Electric shearing instrument for waterproof layer of bridge floor |
CN103868847A (en) * | 2014-03-17 | 2014-06-18 | 深圳市华星光电技术有限公司 | Pressing and tearing device and pressing and tearing method for delaminating rate test |
CN106896056A (en) * | 2017-04-10 | 2017-06-27 | 合肥达悦电子科技有限公司 | Detect the cubing of adhesive tape bonding power |
-
1993
- 1993-10-21 JP JP26369293A patent/JPH07120378A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0292551U (en) * | 1988-12-28 | 1990-07-23 | ||
CN100414282C (en) * | 2003-01-09 | 2008-08-27 | 胡长顺 | Electric shearing instrument for waterproof layer of bridge floor |
CN103868847A (en) * | 2014-03-17 | 2014-06-18 | 深圳市华星光电技术有限公司 | Pressing and tearing device and pressing and tearing method for delaminating rate test |
CN106896056A (en) * | 2017-04-10 | 2017-06-27 | 合肥达悦电子科技有限公司 | Detect the cubing of adhesive tape bonding power |
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