ASTM F14-1980(2015) Standard Practice for Making and Testing Reference Glass-Metal Bead-Seal《标准玻璃金属胎圈密封胶的生产和试验标准实践规程》.pdf
《ASTM F14-1980(2015) Standard Practice for Making and Testing Reference Glass-Metal Bead-Seal《标准玻璃金属胎圈密封胶的生产和试验标准实践规程》.pdf》由会员分享,可在线阅读,更多相关《ASTM F14-1980(2015) Standard Practice for Making and Testing Reference Glass-Metal Bead-Seal《标准玻璃金属胎圈密封胶的生产和试验标准实践规程》.pdf(4页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: F14 80 (Reapproved 2015)Standard Practice forMaking and Testing Reference Glass-Metal Bead-Seal1This standard is issued under the fixed designation F14; the number immediately following the designation indicates the year of originaladoption or, in the case of revision, the year of last
2、revision. A number in parentheses indicates the year of last reapproval. A superscriptepsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice covers procedures for preparing and test-ing reference glass-to-metal bead-seals for determining themagnitude
3、 of thermal expansion (or contraction) mismatchbetween the glass and metal. Tests are in accordance with TestMethod F218 (2).1.2 This practice applies to all glass-metal combinations,established or experimental, particularly those intended forelectronic components.1.3 The practical limit of the test
4、 in devising mismatch isapproximately 300 ppm, above which the glass is likely tofracture.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practic
5、es and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2F15 Specification for Iron-Nickel-Cobalt Sealing AlloyF30 Specification for Iron-Nickel Sealing AlloysF31 Specification for Nickel-Chromium-Iron Sealing AlloysF79 Specification for T
6、ype 101 Sealing Glass2F105 Specification for Type 58 Borosilicate Sealing GlassF218 Test Method for Measuring Optical Retardation andAnalyzing Stress in GlassF256 Specification for Chromium-Iron Sealing Alloys with18 or 28 Percent ChromiumF257 Specification for Twenty-eight Percent (28 %)Chromium-Ir
7、on Alloy for Sealing to Glass (Withdrawn1973)33. Summary of Practice3.1 Seals of a standard configuration are prepared from arepresentative sample of each metal and glass to be tested.Each material is prepared by an approved method and sized asspecified. The seal is formed, annealed, and measured fo
8、roptical retardation from which the axial stress and expansionmismatch are calculated. At least two specimens are requiredfrom which average values are obtained.4. Significance and Use4.1 The term reference as employed in this practice impliesthat both the glass and the metal of the reference glass-
9、metalseal will be a standard reference material such as thosesupplied for other physical tests by the National Institute ofStandards and Technology, or a secondary reference materialwhose sealing characteristics have been determined by seals toa standard reference material (see NIST Special Publicat
10、ion260).4Until standard reference materials for seals are estab-lished by the NIST, secondary reference materials may beagreed upon between producer and user.55. Apparatus5.1 Polarimeter, as specified in Test Method F218 formeasuring optical retardation and analyzing stress in glass.5.2 Heat-Treatin
11、g and Oxidizing Furnaces, with suitablecontrols and with provisions for appropriate atmospheres(Annex A1) for preconditioning metal, if required.5.3 Glassworking Lamp or Sealing Furnace, radiant tube,muffle, or r-f induction with suitable controls and provision foruse with inert atmosphere.5.4 Annea
12、ling Furnace, with capability of controlled cool-ing.5.5 Ultrasonic Cleaner, optional.5.6 Micrometer Caliper, with index permitting direct read-ing of 0.02 cm.1This practice is under the jurisdiction of ASTM Committee C14 on Glass andGlass Products and is the direct responsibility of Subcommittee C1
13、4.04 on Physicaland Mechanical Properties.Current edition approved May 1, 2015. Published May 2015. Originallyapproved in 1961. Last previous edition approved in 2010 as F14 80 (2010). DOI:10.1520/F0014-80R15.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Custom
14、er Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from National Institute of Standards and Technology (NIST
15、), 100Bureau Dr., Stop 1070, Gaithersburg, MD 20899-1070, http:/www.nist.gov. C145Gulati, S. T., and Hagy, H. E., “Expansion Measurement Using ShortCylindrical Seal: Theory and Measurement,” Thermal Expansion 6, edited by Ian D.Peggs, Plenum, New York, N. Y., 1978, pp. 113130.Copyright ASTM Internat
16、ional, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States16. Materials6.1 MetalRepresentative rod stock with out-of-round notexceeding 1 % shall be selected, preferably with a diameter inthe range 0.5 to 4 mm. Smaller diameters result in a loss ofsensitivity and larg
17、er diameters tend to be cumbersome andimpractical. Surfaces shall be relatively free of scratches,machine marks, pits, or inclusions that would induce localizedstresses. Length requirements are discussed in 6.2.6.2 GlassRepresentative glass tubing of suitable opticaltransmission with an inside diame
18、ter 0.15 to 0.25 mm largerthan the metal rod diameter. The outside diameter of the tubingshall preferably be such that it produces a glass-to-metaldiameter ratio between 1.5 and 2. The length of the tubing shallexceed four times the finished glass diameter. The length of themetal rod must exceed the
19、 length of the tubing. Surfacecontaminants shall be removed to reduce the risk of makingbubbly seals. An ultrasonic water mark is recommended.7. Seal-Making Procedure7.1 The seal may be made either by flame-working tech-niques or by heating the tubing-rod assembly in a furnace. Ineither case, rotati
20、on of the assembly is strongly recommendedto maintain geometrical symmetry. For furnace sealing, 5 to10 min at a temperature 100C above the softening point of theglass will generally produce a satisfactory seal.7.2 When used as an acceptance test by producer and user,the number of test seals represe
21、nting one determination shall beestablished by mutual agreement. However two seals are aminimum requirement for one determination.7.3 Upon completion of the seal making, determine the roddiameter, glass bead diameter and length, and record thesedata.8. Annealing8.1 Once a symmetrical, bubble-free se
22、al has been made,proper annealing of the seal becomes the most critical part ofthe procedure. It is by this operation that all stresses arerelieved except those due to the difference in thermal contrac-tion of the two materials from annealing temperature levels.This process involves heating the seal
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
最后一页预览完了!喜欢就下载吧,查找使用更方便
5000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ASTMF1419802015STANDARDPRACTICEFORMAKINGANDTESTINGREFERENCEGLASSMETALBEADSEAL 标准 玻璃 金属 密封胶 生产 试验 实践 规程

链接地址:http://www.mydoc123.com/p-532442.html