ms-4515克莱斯勒标准

《ms-4515克莱斯勒标准》由会员上传分享，免费在线阅读，更多相关内容在应用文档-天天文库。

1、DAIMLERCHRYSLERCORPORATIONNo:MS-4515MaterialStandardDatePublished:2003-05-27CategoryCode:X-1Change:LEASLReq.:NoRESTRICTED:NoCARBONSTEELTAPPINGSCREWS碳钢自攻螺钉1.0GENERAL总则1.1Purpose目的Thisstandarddefinestherequirementsforconventionalcarbonsteeltappingscrews,whichareheattre

2、atedbycasehardeningtheentiresurfaceofthescrew.Thesefastenersdifferfromtiphardenedtappingscrewsinwhichonlythescrewtipiscasehardened.本标准定义了传统碳钢自攻螺钉的要求，螺钉的整个表面经表面硬化的热处理。这些紧固件和只是顶端表面淬硬的自攻螺钉不同。Conventionaltappingscrewsareintendedforgeneralpurposeapplicationssuchasfasteninghe

3、adliners,bezels,internalhardware,etc.Theapplicationsofthesefastenersdifferfromtiphardenedtappingscrewswhichareintendedforstructuralapplications.Themechanicalpropertiesofconventionaltappingscrewswilldegradeifthesefastenersarenotproperlyprotectedandiftheyareusedinavehicle

4、wheretheymaybeexposedtosolutionsusedduringmanufacturingorifusedwheretheymaybeexposedtowaterandsalt.Tiphardenedscrewsaremoreresistanttocorrosiveandembrittlingsolutionsandarethepreferredfastenerforexteriorapplications.常规的自攻螺钉是用于普通的用途，比如夹紧headliners（？）,bezels（？）,内部硬件等。这些紧固

5、件的应用和顶端淬硬的应用于结构的自攻螺钉不同。如果没有完全被保护，如果它们在车里使用可能暴露于制造过程中使用的溶剂时，常规自攻螺钉的机械性能将降低。顶端淬硬的螺钉更能抵抗腐蚀和使之脆化的溶液，更适合于外部的使用。1.2CoverageofthisStandard本标准的覆盖范围Thisstandardcoversthechemicalcomposition,processing(forming,heattreating),mechanicalpropertiesandtests,surfaceconditionsandqualityr

6、equirementsofthefinishedparts.本标准包括成品的化学成分，过程（成形，热处理），机械性能和测试，表面状况的质量要求。1.3LimitationsonUsage使用的限制FastenerEngineeringandMaterialsEngineeringhavedevelopedapolicyfortappingscrewusage.Whenitisnecessarytospecifyatappingscrew,MS-4515shallbeusedforfastenerslessthan6mmindia

7、meterandMS-8253,InductionHardenedTipTappingScrews,shallbeusedforfasteners6mmandlarger.Ifitisnotpossibletoinductionhardenatappingscrew6mmindiameterorlarger,itisstronglyadvisedthatanalternatejoiningtechniquebeselected.Casehardenedtappingscrewsshouldnotbeselectedforanys

8、tructuralapplications,thoseapplicationswherethefastenerseeshighstressoradverseenvironmentssuchassaltwater.紧固件工