欢迎来到麦多课文档分享! | 帮助中心 海量文档,免费浏览,给你所需,享你所想!
麦多课文档分享
全部分类
  • 标准规范>
  • 教学课件>
  • 考试资料>
  • 办公文档>
  • 学术论文>
  • 行业资料>
  • 易语言源码>
  • ImageVerifierCode 换一换
    首页 麦多课文档分享 > 资源分类 > PDF文档下载
    分享到微信 分享到微博 分享到QQ空间

    SAE J 1887-2002 Automotive Compacted Graphite Iron Castings.pdf

    • 资源ID:1026601       资源大小:1MB        全文页数:13页
    • 资源格式: PDF        下载积分:10000积分
    快捷下载 游客一键下载
    账号登录下载
    微信登录下载
    二维码
    微信扫一扫登录
    下载资源需要10000积分(如需开发票,请勿充值!)
    邮箱/手机:
    温馨提示:
    如需开发票,请勿充值!快捷下载时,用户名和密码都是您填写的邮箱或者手机号,方便查询和重复下载(系统自动生成)。
    如需开发票,请勿充值!如填写123,账号就是123,密码也是123。
    支付方式: 支付宝扫码支付    微信扫码支付   
    验证码:   换一换

    加入VIP,交流精品资源
     
    账号:
    密码:
    验证码:   换一换
      忘记密码?
        
    友情提示
    2、PDF文件下载后,可能会被浏览器默认打开,此种情况可以点击浏览器菜单,保存网页到桌面,就可以正常下载了。
    3、本站不支持迅雷下载,请使用电脑自带的IE浏览器,或者360浏览器、谷歌浏览器下载即可。
    4、本站资源下载后的文档和图纸-无水印,预览文档经过压缩,下载后原文更清晰。
    5、试题试卷类文档,如果标题没有明确说明有答案则都视为没有答案,请知晓。

    SAE J 1887-2002 Automotive Compacted Graphite Iron Castings.pdf

    1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro

    2、m, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.Copyright 2007 SAE InternationalAll rights reserved. No part of this publication may be

    3、reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying,recording, or otherwise, without the prior written permission of SAE.TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada)Tel: 724-776-4970 (outside USA)Fax: 724-

    4、776-0790Email: CustomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSURFACEVEHICLESTANDARDJ1887REAF.DEC2007Issued 2002-07Reaffirmed 2007-12Superseding J1887 JUL2002Automotive Compacted Graphite Iron Castings1. Scope1.1 This SAE Standard covers the mechanical and physical requirements for Compacte

    5、d Graphite Iron (CGI)castings used in automotive and allied industries. Requirements in this document include:a. Tensile Strengthb. Yield Strengthc. Elongationd. Graphite Morphology1.2 Appendix A provides general information on application of this material along with additional data onmechanical and

    6、 physical properties not specified but useful as a design reference. Appendix B provides aCompacted Graphite Iron Percent Nodularity Rating Chart not specified but useful as a visual reference.2. References2.1 Applicable PublicationsThe following publications form a part of this specification to the

    7、 extent specifiedherein.2.1.1 ASTM PUBLICATIONSAvailable from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.ASTM A 247Test Method for Evaluating the Microstructure of Graphite in Iron CastingsASTM E 8MTest Methods for Tension Testing of Metallic Materials (Metric)ASTM E 9Test Methods

    8、 of Compression Testing of Metallic Materials at Room TemperatureASTM E 10Test Method for Brinell Hardness of Metallic MaterialsASTM E 21Test Methods for Elevated Temperature Tension Tests of Metallic MaterialsASTM E 132Standard Test Method for Poissons Ratio at Room TemperatureSAE J1887 Reaffirmed

    9、DEC2007-2-2.2 Related PublicationsThe following publications are provided for information purposes only and are not arequired part of this specification.2.2.1 SAE PUBLICATIONSAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.I.C.H. Hughes and J. Powell, “Compacted Graphite Irons

    10、High Quality Engineering Materials in the CastIron Family,” SAE Paper 840772, 1984.S. Dawson, I. Hollinger, M. Robbins, J. Daeth, U. Reuter and H. Schultz, “The Effect of MetallurgicalVariables on the Machinability of Compacted graphite Iron,” SAE Technical Paper Series 2001-01-0409, March 2001.2.2.

    11、2 OTHERE. Nechtelberger, H. Puhr, J.B. van Nesselrode and A. Nakayasu, “Cast Iron with Vermicular/CompactedGraphite State of the Art,” International Foundry Congress, Chicago, Illinois, April 1983.D.M. Stefanescu and C.R. Loper, “Recent Progress in the Compacted/Vermicular Graphite Cast Iron Field,”

    12、Giesserei-Prax., No. 5.S. Dawson, I. Hollinger and P. Smiles, “The Mechanical and Physical properties of Compacted GraphiteIron,” Global Powertrain Congress, Detroit, October 19983. Grades3.1 The specified grades, minimum mechanical properties and microstructure requirements, are shown in Table 1.4.

    13、 Hardness 4.1 The hardness ranges provided in Table 1 are guidelines only.4.2 The area or areas on the casting where hardness may be checked should be established by agreementbetween the manufacturer and the purchaser.4.3 Brinell hardness shall be determined according to ASTM E 10, Test for Brinell

    14、Hardness of Metallic Materials,after sufficient material has been removed from the casting to ensure representative hardness readings. A10 mm ball, 3000 kg load and 10 second delay time shall be used unless otherwise agreed upon.TABLE 1MINIMUM MECHANICAL PROPERTIES AND MICROSTRUCTUREFOR COMPACTED GR

    15、APHITE IRON(1)1. Refer to 7.1Grade(2)2. “HN” denotes “High Nodularity”. These grades are characterized by having 20 to 50% nodularity while conventional CGI is characterized by having less than 20% nodularity.TypicalHardnessRangeMinimum Tensile StrengthMPaMinimum Tensile StrengthksiMinimum 0.2% Yiel

    16、d StrengthMPaMinimum 0.2% Yield StrengthksiMinimum%ElongationTypicalMatrix MicrostructureGraphite Morphology % Nodularity(3)3. Refer to 6.1C250 121-179 HB 250 36.3 175 25.4 3.0 Ferritic 80% in PCBN turning operations have been observed.The inability to alter the compacted graphite shape without sacr

    17、ificing the material properties limits the ability toimprove the machinability of the CGI itself. For example, a CGI structure containing patches of flake graphiteprovides approximately 30% longer tool life than normal CGI, however the flake patch structure results inreduced mechanical properties.In

    18、creasing percent nodularity from conventional CGI to the typical ductile iron ranges also results in furtherreduced machinability. In operations utilizing carbide tooling, low nodularity CGI has up to 2 times longer toollife. In PCBN turning studies, a 5% nodularity CGI had 40% longer tool life than

    19、 a 50% nodularity iron and 3.5times longer life than a 85% nodularity iron. Given that CGI is inherently more difficult to machine than gray iron, every effort to reduce percent nodularitywill contribute to the CGI tool life. For components requiring extensive machining, a conventional grade of CGI(

    20、0 to 20% nodularity) should be selected.A.5.2 Effects of PearliteThe machinability of iron castings decreases as the Fe3C (cementite) content increases(pearlite spacing decreases). This factor may predominate in explaining foundry-to-foundry variations in CGImachinability.Changes in pearlite content

    21、 do not provide a quantum step toward making CGI machinability equal to gray iron.Depending on cutting tool materials and machining conditions (feed and speed) milling may improve withincreasing pearlite while turning and/or boring become more difficult. The decision of optimal pearlite contentwill

    22、ultimately vary depending on the insert materials, cutting speeds and the need to alleviate specificmachining bottlenecks.TABLE A4MECHANICAL AND PHYSICAL PROPERTIES OF PEARLITIC CAST IRONSMaterial PropertyPercent Nodularity10Percent Nodularity30Percent Nodularity50Percent Nodularity70Percent Nodular

    23、ity90Tensile Strength (MPa) 450 520 590 640 7000.2% Yield Strength (MPa) 370 390 410 440 490Fatigue Limit (MPa) 210 220 230 240 255Elastic Modulus (GPa) 145 150 155 155 160Elongation (%) 1-2 1-3 2-4 2-5 3-6Thermal Expansion (m/m-C) 11.0 11.0 11.0 11.5 12.0Thermal Conductivity (W/m-C) 37 33 31 30 28S

    24、AE J1887 Reaffirmed DEC2007-10-A.5.3 Effects of Alloying ElementsCopper and tin are the preferred alloys for pearlite stabilization up to 95%.Further alloying with manganese, chromium or antimony to achieve a 100% pearlitic microstructure mayreduce tool life by up to 50%, likely due to increases in

    25、the Fe3C content of the pearlite that results fromincreasing these elements. A.5.4 Elemental EffectsTitanium levels in cast irons are determined either by the raw materials or intentionalalloying. Small amounts of titanium may be added to form hard, titanium carbonitride inclusions to improve thewea

    26、r resistance of CGI. Larger amounts of titanium are sometimes used to assist in the control of the graphitemorphology and/or section sensitivity. The presence of titanium can reduce machining tool life, compared totitanium-free CGI. This can be particularly important in the production of high volume

    27、 castings that requireextensive machining such as cylinder blocks and heads. In these applications titanium should be kept as lowas possible to preserve CGI machinability. The titanium content may be less critical in low volume or lesser-machined castings such as exhaust manifolds that may require t

    28、itanium for microstructure control.Chromium is a potent pearlite stabilizer and carbide promoter in CGI. It should be restricted to trace levels forthe optimal machining of CGI.SAE J1887 Reaffirmed DEC2007-11-APPENDIX BCOMPACTED GRAPHITE IRON PERCENT NODULARITY RATING CHART(MATERIAL DESCRIPTION NOT

    29、A PART OF THE STANDARD REQUIREMENTS)B.1 See Figures B1 and B2.FIGURE B1COMPACTED GRAPHITE IRON PERCENT NODULARITY RATING CHART(MATERIAL DESCRIPTION NOT A PART OF THE STANDARD REQUIREMENTS)SAE J1887 Reaffirmed DEC2007-12-FIGURE B2COMPACTED GRAPHITE IRON PERCENT NODULARITY RATING CHART(MATERIAL DESCRI

    30、PTION NOT A PART OF THIS DOCUMENT)SAE J1887 Reaffirmed DEC2007RationaleNot applicable.Relationship of SAE Standard to ISO StandardNot applicable.ApplicationThis SAE Standard covers the mechanical and physical requirements for Compacted GraphiteIron (CGI) castings used in automotive and allied indust

    31、ries. Requirements in this document include:a. Tensile Strengthb. Yield Strengthc. Elongationd. Graphite MorphologyAppendix A provides general information on application of this material along with additional data onmechanical and physical properties not specified but useful as a design reference. A

    32、ppendix B providesa Compacted Graphite Iron Percent Nodularity Rating Chart not specified but useful as a visualreference.Reference SectionASTM A 247Test Method for Evaluating the Microstructure of Graphite in Iron CastingsASTM E 8MTest Methods for Tension Testing of Metallic Materials (Metric)ASTM

    33、E 9Test Methods of Compression Testing of Metallic Materials at Room TemperatureASTM E 10Test Method for Brinell Hardness of Metallic MaterialsASTM E 21Test Methods for Elevated Temperature Tension Tests of Metallic MaterialsASTM E 132Standard Test Method for Poissons Ratio at Room TemperatureI.C.H.

    34、 Hughes and J. Powell, “Compacted Graphite Irons High Quality Engineering Materials in theCast Iron Family,” SAE Paper 840772, 1984.S. Dawson, I. Hollinger, M. Robbins, J. Daeth, U. Reuter and H. Schultz, “The Effect of MetallurgicalVariables on the Machinability of Compacted graphite Iron,” SAE Tec

    35、hnical PaperSeries 2001-01-0409, March 2001.E. Nechtelberger, H. Puhr, J.B. van Nesselrode and A. Nakayasu, “Cast Iron with Vermicular/CompactedGraphite State of the Art,” International Foundry Congress, Chicago, Illinois, April1983.D.M. Stefanescu and C.R. Loper, “Recent Progress in the Compacted/V

    36、ermicular Graphite Cast IronField,” Giesserei-Prax., No. 5.S. Dawson, I. Hollinger and P. Smiles, “The Mechanical and Physical properties of Compacted GraphiteIron,” Global Powertrain Congress, Detroit, October 1998Developed by the SAE Metals Technical Committee Division 9Automotive Iron and Steel CastingsSponsored by the SAE Metals Technical Committee


    注意事项

    本文(SAE J 1887-2002 Automotive Compacted Graphite Iron Castings.pdf)为本站会员(postpastor181)主动上传,麦多课文档分享仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知麦多课文档分享(点击联系客服),我们立即给予删除!




    关于我们 - 网站声明 - 网站地图 - 资源地图 - 友情链接 - 网站客服 - 联系我们

    copyright@ 2008-2019 麦多课文库(www.mydoc123.com)网站版权所有
    备案/许可证编号:苏ICP备17064731号-1 

    收起
    展开