AS 2027-2007 Abrasive-resistant cast irons.pdf.pdf
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1、 AS 20272007 ISO 21988:2006 Australian Standard Abrasive-resistant cast irons AS 20272007 This Australian Standard was prepared by Committee MT-001, Iron and Steel. It was approved on behalf of the Council of Standards Australia on 8 December 2006. This Standard was published on 29 January 2007. The
2、 following are represented on Committee MT-001: Australian Railway Association Australian Building Codes Board Australian Foundry Institute Australian Industry Group Australian Steel Industry Bureau of Steel Manufacturers of Australia Institute of Materials Engineering Research Association New Zeala
3、nd Heavy Engineering Research Association This Standard was issued in draft form for comment as DR 06615. Standards Australia wishes to acknowledge the participation of the expert individuals that contributed to the development of this Standard through their representation on the Committee and throu
4、gh public comment period. Keeping Standards upKeeping Standards upKeeping Standards upKeeping Standards up- - - -totototo- - - -datedatedatedate Australian Standards are living documents that reflect progress in science, technology and systems. To maintain their currency, all Standards are periodica
5、lly reviewed, and new editions are published. Between editions, amendments may be issued. Standards may also be withdrawn. It is important that readers assure themselves they are using a current Standard, which should include any amendments that may have been published since the Standard was publish
6、ed. Detailed information about Australian Standards, drafts, amendments and new projects can be found by visiting www.standards.org.auwww.standards.org.auwww.standards.org.auwww.standards.org.au Standards Australia welcomes suggestions for improvements, and encourages readers to notify us immediatel
7、y of any apparent inaccuracies or ambiguities. Contact us via email at mailstandards.org.aumailstandards.org.aumailstandards.org.aumailstandards.org.au, or write to Standards Australia, GPO Box 476, Sydney, NSW 2001. AS 20272007 Australian Standard Abrasive-resistant cast irons Originated as AS 2020
8、1977. Previous edition 2002. Fourth edition 2007. COPYRIGHT Standards Australia All rights are reserved. No part of this work may be reproduced or copied in any form or by any means, electronic or mechanical, including photocopying, without the written permission of the publisher. Published by Stand
9、ards Australia, GPO Box 476, Sydney, NSW 2001, Australia ISBN 0 7337 7991 3 ii PREFACE This Standard was prepared by the Joint Standards Australia/Standards New Zealand Committee MT-001, Iron and Steel, to supersede AS 20272002, Wear-resistant white cast irons. After consultation with stakeholders i
10、n both countries, Standard Australia and Standards New Zealand decided to develop this Standard as an Australian, rather than an Australian/New Zealand Standard. This Standard is identical with, and has been reproduced from ISO 21988:2006, Abrasive- resistant cast ironsClassification. The objective
11、of this Standard is to specify grades of abrasive-resistant cast irons by chemical composition and hardness. This Standard is one of a series of Standards covering the range of tensile testing methods. The series comprises the following: AS 1830 Grey cast iron 1831 Ductile cast iron 1832 Malleable c
12、ast iron 1833 Austenitic cast iron 1982 Methods for the measurement of case depth in steels 2027 Abrasive-resistant cast irons (this Standard) 2074 Cast steels 4314 FoundingPatterns, pattern equipment and coreboxes for the production of sand moulds and sand cores 4738 Metal casting 4738.1 Part 1: Fe
13、rrous sand moulded 5049 Cast ironDesignation of microstructure of graphite 5052 Compacted (vermicular) graphite cast ironsClassification 5054 Ausferritic spheroidal graphite cast ironsClassification 5080 Ferrous materialsHeat treatmentGlossary of terms As this Standard is reproduced from an internat
14、ional standard, the following applies: (a) Its number appears on the cover and title page while the international standard number appears only on the cover (b) In the source text this International Standard should read this Australian Standard. (c) A full point substitutes for a comma when referring
15、 to a decimal marker. (d) Where the ISO Standard number is shown (i.e. ISO 21988) in an abrasive-resistant cast iron specification, it should be read as AS 2027. iii References to International Standards should be replaced by references to Australian Standards, as follows: Reference to International
16、 Standard Australian Standard ISO AS 6506 Metallic materialsBrinell hardness test 1816 Metallic materialsBrinell hardness test 6506-1 Part 1: Test method 1816.1 Part 1: Test method (ISO 6506-1:1997, MOD) 4738 Metal castings TR 15931 Designation system for cast irons and pig irons 4738.1 Part 1: Ferr
17、ous sand moulded The term informative has been used in this Standard to define the application of the annex to which it applies. An informative annex is only for information and guidance. iv CONTENTS Page ISO 21988:2006(E) ISO 2006 All rights reserved iii Contents Page Foreword iv Introduction v 1 S
18、cope . 1 2 Normative references. 1 3 Terms and definitions. 2 4 Designation . 2 5 Order information . 2 6 Manufacture. 2 6.1 General. 2 6.2 Heat treatment. 3 7 Requirements 3 7.1 Chemical composition 3 7.2 Brinell hardness 3 7.3 Microstructure. 3 8 Sampling 4 8.1 Frequency of sampling for chemical a
19、nalysis. 4 8.2 Number and frequency of Brinell hardness tests . 4 9 Testing . 4 9.1 Chemical analysis. 4 9.2 Hardness test 4 9.3 Microstructure sample . 5 10 Retests. 5 10.1 Need for retests. 5 10.2 Test validity. 5 10.3 Nonconforming test results. 5 10.4 Heat treatment of castings. 5 Annex A (infor
20、mative) Heat treatment 8 Annex B (informative) Conversion between Brinell, Vickers and Rockwell C hardness 10 Annex C (informative) Relationship between casting thickness and chemical composition for nickel-chromium cast irons. 11 Annex D (informative) Typical microstructures of abrasion-resistant c
21、ast iron . 12 Annex E (informative) Cross references to other standards. 13 Bibliography. 14 v INTRODUCTION ISO 21988:2006(E) ISO 2006 All rights reserved Introduction This International Standard deals with the classification of abrasion-resistant white cast irons in accordance with their chemical c
22、omposition and hardness. Such cast irons are widely used in the mining, earth moving, milling and manufacturing industries where high resistance to abrading minerals and other abrading solids is required. The abrasion resistance of these irons depends upon them having the appropriate structure and h
23、ardness for the application. These properties are obtained by careful control of the material composition and the processing route. vi NOTES AUSTRALIAN STANDARD Abrasive-resistant cast iron ISO 2006 All rights reserved 1 Abrasion-resistant cast irons Classification 1 Scope This International Standar
24、d defines the grades of abrasion-resistant white cast irons. It specifies the grades in terms of: chemical composition; hardness. The types of abrasion-resistant white cast irons covered by this International Standard are: a) unalloyed or low alloy cast irons; b) nickel-chromium cast irons covering
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