hardness test —. Part 1: Test method. Matériaux métalliques — Essai de dureté Vickers —. Partie 1: Méthode d’essai. STANDARD. ISO. Fourth edition. ISO INTERNATIONAL. STANDARD. ISO. Third edition. Metallic materials — Vickers hardness test —. Part 1: Test method. Matériaux . I.S. EN ISO is the adopted Irish version of the European . The text of ISO has been approved by CEN as EN ISO.
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Ihre Klassifizierung und Auswirkung auf die Messwerte. It is important that the test piece lies firmly on the support so that displacement cannot occur during the test.
The arithmetical mean of the two readings shall be taken for the calculation of the Vickers hardness.
isp It is intended to make the annex normative in the next revision of this part of ISO Standard. For low-force hardness and microhardness tests, the maximum time shall not exceed 10 s. NOTE 2 In general, decreasing the test force increases the scatter of results of the measurements. It should be noted that for anisotropic materials, for example those which have been heavily cold-worked, there will be a difference between the lengths of the two diagonals of the indentation.
ISO shall not be held responsible for identifying any or all such patent rights. Need more than one copy? In M1, the error limit, that means the range in which the machine is allowed to differ from the reference standard is used to define the source uE of the uncertainty.
If not, an indirect verification should be performed. In general, as a result of the measurement, method 1 [Equation D. If two adjacent indentations differ in size, the spacing shall be based on the mean diagonal length of the larger indentation. The specification for the product may indicate limits for the differences between the lengths of the two diagonals. The procedure for the determination of U is explained in Table D.
The ios of preparing International Standards is normally carried out through ISO technical committees.
BS EN ISO 6507-1:2018
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The error b step 10 can be expected to be a systematic effect. You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. This is the base of M2.
Already Subscribed to this document. In GUM, it is recommended to use a correction to compensate for such systematic effects.
ISO – Metallic materials — Vickers hardness test — Part 1: Test method
For dated references, only the edition cited applies. ISO consists of the following parts, under the general title Metallic materials — Vickers hardness test: The time from the initial application of the force until the full test force is reached shall not be less than 2 s nor greater than 8 s. NOTE 1 For indentation diagonals less than 0, mm, the increase of the uncertainty has to be 6570-1.
Proceed to Checkout Continue Shopping. M2 may lead to smaller values of uncertainty.
ISO ： 金属维氏硬度试验 第一部分：试验方法 – MBA智库文档
Figure 1 — Principle of the test The Vickers hardness is proportional to the quotient obtained by dividing the test force by the sloping area of the indentation, which is assumed to be a right pyramid with a square base, and having is the vertex the same angle as iiso indenter.
This is particularly true for low-force Vickers hardness tests and Vickers microhardness tests, where the principal limitation will arise in the measurement of the diagonals of the indentation.
Werkstofftechnik 4pp. HV 2,5 24,52 N may be used. If the difference is greater, this shall be stated in the test report. Naturally, direct calibration and the verification of these machines should be at the highest possible accuracy. It is strongly recommended that this procedure be applied for a maximum of one year after the successful passing of a direct verification. The error is no longer in the calculation of the uncertainty but all determined hardness values have to be corrected by b or Ucorr has to be increased by b.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The finish of the surface shall permit accurate determination of the diagonal length of the indentation. The main task of technical committees is to prepare International Standards.
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Test method 1 Scope This part of ISO specifies the Vickers hardness test method, for the three different ranges of test force for metallic materials see Table 1. For these tests, a longer duration is permitted ido this duration shall be specified as part of the hardness designation see EXAMPLE in 4.
The required thickness is given by the point of intersection of the minimum thickness scale and a line shown dotted in the example in Figure A. A record of these results should be maintained over a period of time, and used to measure reproducibility and monitor drift of the machine.
In the unlikely event that a problem ieo to it is found, please inform the Central Secretariat at the address given below. The duration of the test force shall be 10 s to 15 s, except for tests on materials whose time-dependent properties would make this an unsuitable 6507. Your Alert Profile lists the documents that will be monitored. For undated references, the latest edition of the referenced document including any amendments applies.
This standard is not included in any packages. The correction factors sio tabulated in terms of the ratio of the mean diagonal d of the indentation to the diameter D of the cylinder.