【BS标准word原稿】BS EN 103282005 钢铁：表面加热后常规淬硬深度的测定Iron and steel. Determination of the convention.doc

豆丁网：Licensed Copy: sheffieldun sheffieldun, na, Thu Oct 26 04:40:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSIBRITISH STANDARD BS EN10328:2005Iron and steel Determination of the conventional depth of hardening after surface heatingThe European Standard EN 10328:2005 has the status of aBritish StandardICS 77.040.10 BS EN 10328:2005National forewordThis British Standard is the official English language version ofEN 10328:2005. It supersedes BS 6481:1984 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee ISE/72, Methods of physical and metallographic testing, which has the responsibility to:aid enquirers to understand the text;present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed;monitor related international and European developments and promulgate them in the UK.A list of organizations represented on this committee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred 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 ofBritish Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard does not of itself confer immunity from legal obligations.Licensed Copy: sheffieldun sheffieldun, na, Thu Oct 26 04:40:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSIThis British Standard was published under the authority of the Standards Policy and Strategy Committee on21 February 2005© BSI 21 February 2005ISBN 0 580 45510 6Summary of pagesThis 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.The BSI copyright notice displayed in this document indicates when the document was last issued.Amd. No.DateCommentsAmendments issued since publicationEUROPEAN STANDARD NORME EUROPÉENNEEUROPÄISCHE NORMEN 10328February 2005ICS 77.040.10English versionIron and steel - Determination of the conventional depth of hardening after surface heatingProduits sidérurgiques - Détermination de la profondeur conventionnelle de trempe après chauffage superficielEisen und Stahl - Bestimmung der Einhärtungstiefe nach dem RandschichthärtenThis European Standard was approved by CEN on 3 January 2005.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions.CEN members are the national standards bodies of 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, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATION C O M I TÉ EUR O P ÉEN DE NOR M A L I S A TI ON EUR O P Ä I S C H ES KOM I TEE F Ü R NOR M UNG Management Centre: rue de Stassart, 36 B-1050 BrusselsLicensed Copy: sheffieldun sheffieldun, na, Thu Oct 26 04:40:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI© 2005 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members.Ref. No. EN 10328:2005: EEN 10328:2005 (E)Licensed Copy: sheffieldun sheffieldun, na, Thu Oct 26 04:40:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSIContentsPage1Scope . 42Normative references . 43Terms and definitions . 44Conventions . 45Limits of the method. 56Test method. 57Test report . 65Licensed Copy: sheffieldun sheffieldun, na, Thu Oct 26 04:40:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSIForewordThis 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 publication 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 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, Spain, Sweden, Switzerland and United Kingdom.Licensed Copy: sheffieldun sheffieldun, na, Thu Oct 26 04:40:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI1ScopeThis document defines the test method for the determination of the conventional depth of hardening after surface heating.2Normative referencesThe following referenced documents are indispensable for the application of this document. 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)3Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1hardness limithardness (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".3.2effective depth of hardness after surface heatingdistance 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 N4Conventions4.1Expression of the effective depth of hardness after surface heatingThis 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.4.2Special casesAll other values of hardness limit should 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 agreement between the parties, which should also define the value of the hardness limit.Licensed Copy: sheffieldun sheffieldun, na, Thu Oct 26 04:40:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI5Limits of the methodThe 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 distance 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).6Test method6.1GeneralThe measuring is 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 (see3.1) is the only one applicable in the case of litigation.6.2Principles of determinationThe 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.6.3Carrying out the determination6.3.1Preparation of the surface examinedThe 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 the piece.6.3.2Determination of the hardnessThe 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 surface 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 the surface and the impressions (d1, d2, d3) are determined from the centre of the latter: the absolute error should then not be greater than ± 25 µm.These determinations are carried out on the surface in question in one or more specified regions by agreement between the parties and indicated on 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.6.4Result of the determinationThe curve or curves plotted make it possible to determine for each band of the surface in question, the distance 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.Licensed Copy: sheffieldun sheffieldun, na, Thu Oct 26 04:40:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI7Test reportThe test report should indicate:¾ test piece description and its heat treatment ;¾ area of the piece where the tests are carried out ;¾ curves of the zones in question ;¾ depth of hardness after surface heating ;¾ parameters which have influenced the results.Key1Distance2HVFigure 1 Position of the hardness impressionsblankLicensed Copy: sheffieldun sheffieldun, na, Thu Oct 26 04:40:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSILicensed Copy: sheffieldun sheffieldun, na, Thu Oct 26 04:40:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSIBS EN10328:2005BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI is the independent national body responsible for preparingBritish Standards. 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