简介:Theslowtensiletests,dynamichydrogenchargingtensiletestsandhydrogenevolutiontestsafterhydrogenchargingwereusedtostudytheeffectsofrareearthmetal(REM)onhydrogenbehaviourinasteel16Mn(St.52).TheratiosofRE/Swerechosenas0,0.7,2.2and7.7,respectively.ItwasshownthatthesteelwithRE/S=2.2givealowerhydrogenembrittlementsusceptibilitythanothers.ThesteelswithoutREMcanadsorbmuchmoreamountofhydrogenthanthatwithREMunderthesamehydrogenchargingconditions.Andtheamountofadsorbedhydrogenfortheforinercanbeevolvedeasierthanthatforthelatteratroomtemperature,50℃and80℃,respectively.Theexperimentalresultswereexplainedbythetraptheoryofhydrogen,theshort-circuitdiffusionpathsintheinterfacesbetweentheelongatedMnSinclusionsandthematrix,andstrongabilityofREMtoadsorbhydrogen.
简介:探讨了在大生产条件下4Cr5MoSiV1钢的脱碳层测定原则。结果表明,金相法测定结果较准确且操作简便