EN 10328-2005 en Iron and steel - Determination of the conventional depth of hardening after surface heating《钢铁 表面加热后常规淬硬深度的测定》.pdf

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1、BRITISH STANDARD BS EN 10328:2005 Iron and steel Determination of the conventional depth of hardening after surface heating The European Standard EN 10328:2005 has the status of a British Standard ICS 77.040.10 BS EN 10328:2005 This British Standard was published under the authority of the Standards

2、 Policy and Strategy Committee on 21 February 2005 BSI 21 February 2005 ISBN 0 580 45510 6 National foreword This British Standard is the official English language version of EN 10328:2005. It supersedes BS 6481:1984 which is withdrawn. The UK participation in its preparation was entrusted to Techni

3、cal Committee ISE/72, Methods of physical and metallographic testing, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications refe

4、rred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provi

5、sions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation,

6、 or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 6, an inside back cover and a back cover.

7、The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN10328 February2005 ICS77.040.10 Englishversion IronandsteelDeterminationoftheconventionaldepthof

8、 hardeningaftersurfaceheating ProduitssidrurgiquesDterminationdelaprofondeur conventionnelledetrempeaprschauffagesuperficiel EisenundStahlBestimmungderEinhrtungstiefenach demRandschichthrten ThisEuropeanStandardwasapprovedbyCENon3January2005. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegul

9、ationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversi

10、ons(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland

11、,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeS

12、tassart,36B1050Brussels 2005CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN10328:2005:EEN 10328:2005 (E) 2 Contents Page 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Conventions .4 5 Limits of the method5 6 Test method5 7 Test re

13、port 6 EN 10328:2005 (E) 3 Foreword This document (EN 10328:2005) has been prepared by Technical Committee ECISS/TC 2 “Steel Physico- chemical and non-destructive testing”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by p

14、ublication of an identical text or by endorsement, at the latest by August 2005, and conflicting national standards shall be withdrawn at the latest by August 2005. This document supersedes EURONORM 116:1972. According to the CEN/CENELEC Internal Regulations, the national standards organizations of

15、the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spai

16、n, Sweden, Switzerland and United Kingdom. EN 10328:2005 (E) 4 1 Scope This document defines the test method for the determination of the conventional depth of hardening after surface heating. 2 Normative references The following referenced documents are indispensable for the application of this doc

17、ument. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN ISO 6507-1, Metallic materials - Vickers hardness test - Part 1: Test method. (ISO 6507-1:1997) 3 Terms and definitions For the pu

18、rposes of this document, the following terms and definitions apply. 3.1 hardness limit hardness (expressed in HV and measured according to EN ISO 6507-1) defined compared to minimal hardness on the surface of the piece in question by the ratio : “hardness limits“ = 0,80 X “minimal surface hardness“.

19、 3.2 effective depth of hardness after surface heating distance between the surface of the piece to be tested and the point in the layer where the Vickers hardness is equal to the hardness limit, when measured under a strength of 9,807 N 4 Conventions 4.1 Expression of the effective depth of hardnes

20、s after surface heating This parameter is designated by the symbol D.S. Its determination is expressed in millimetres, in the zone designated in the plan, on a piece, which may or may not have been rectified depending on the specification. 4.2 Special cases All other values of hardness limit should

21、be specially agreed. It should then be indicated by the symbol D.S. By agreement between the parties, loads differing from the test strength (9,807 N) may be used, these loads being within the range 4,903 and 49,03 N. Similarly, the use of the Rockwell method should be the subject of a prior agreeme

22、nt between the parties, which should also define the value of the hardness limit. EN 10328:2005 (E) 5 5 Limits of the method The test is carried out only on: a) layers hardened by quenching, the thickness of which is greater than 0,3 mm; b) pieces which, in the condition in question, have at the dis

23、tance 3 x DS from the surface, a hardness less than : HV = a hardness lower than the hardness limit 100. In the cases where these conditions are not satisfactory, the depth of hardening after surface heating, shall be defined by special agreement (see 4.2). 6 Test method 6.1 General The measuring is

24、 carried out, unless otherwise agreed, on a cross section of the piece in the hardened condition. The method of determining the effective depth of hardening after surface heating under test strength 9,807 N (see 3.1) is the only one applicable in the case of litigation. 6.2 Principles of determinati

25、on The depth of hardening is determined from the profile of hardness from a cross section normal to the surface. It is calculated graphically on a curve representing the variations of this hardness as a function of the distance from the surface of the piece. 6.3 Carrying out the determination 6.3.1

26、Preparation of the surface examined The section to be determined shall be polished so as to permit the correct determination of the dimensions of the hardness impressions. All necessary precautions shall be taken to avoid rounding the edges of this section adjacent to the surface and over heating th

27、e piece. 6.3.2 Determination of the hardness The hardness impressions are placed along one or more lines normal to the surface and within a band width (w) 1,5 mm wide (see Figure 1). The distance between the surface and successive impressions increases in 0,1 mm steps, the first point near the surfa

28、ce being 0,15 mm from the surface. In the case of very deep surface hardness, the distances between the impressions can be greater, but the distance between the impressions (S) shall remain 0,1 mm in the immediate vicinity of the zone presumed to exhibit the maximum hardness. The distances between t

29、he surface and the impressions (d 1 , d 2 , d 3 ) are determined from the centre of the latter: the absolute error should then not be greater than 25 m. These determinations are carried out on the surface in question in one or more specified regions by agreement between the parties and indicated on

30、the drawing. For each region, the variation in hardness results should be plotted on a curve that represents them as a function of the distance to the surface. 6.4 Result of the determination The curve or curves plotted make it possible to determine for each band of the surface in question, the dist

31、ance to the surface from the point where the hardness is equal to the hardness limit, this distance representing the effective depth of hardening after surface heating. EN 10328:2005 (E) 6 7 Test report The test report should indicate: test piece description and its heat treatment ; area of the piec

32、e where the tests are carried out ; curves of the zones in question ; depth of hardness after surface heating ; parameters which have influenced the results. Key 1 Distance 2 HV Figure 1 Position of the hardness impressions blankBS EN 10328:2005 BSI 389 Chiswick High Road London W4 4AL BSI British S

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