S31008不銹鋼焊接全流程質(zhì)控技術(shù)優(yōu)化研究

打開文本圖片集

Abstract：Todressthedefectssuchashotcracks，Ophase precipitation，andintergranularcorosionthatareprone tooccurinthe welding jointsofeatresistantusteniticstainlessstelS38，thisppersystematicalstudedteweldingperfoanceadhigh temperaturefailuremechanismofthisstainlessteeltroughtheoptimizeddesignofthematchingofweldingmaterials，thecontrolof gradientheatinput，ndthedynamiccoolingprocessBasedonorthogonaltestsndstandardtests，thepaperrevealedthehbitory effectoftecoordnatedontrolofeatiputandinterlaertempratureonthprecipiatonbehaviorofarbdesndonstructefullprocessqualitycontrolsystemcovering pre-welding purificationtreatment，processparametermonitoring，andpost-welding microstructureoptiization.Theresultsshowtattheoptimizedprocesscanincreasetheigtemperaturestrengthoftheweldingjoint to 92% of that of the base metal and reduce the intergranular corrosion rate by 45% ， providing a standardized solution for the welding andmanufacturingofhigh-temperature pressre-bearing equipmentsuchaspetrochemicalreactorsandnuclearsteamgenerators.

Keywords：S31Oo8 stainless steel; weldability; high-temperature tensile creep test; heat inputcontrol

S31008（06Cr25Ni20）是一種高鉻高鎳耐熱型奧氏體不銹鋼，憑借其優(yōu)異的高溫強(qiáng)度（ 1150°C 下抗氧化性達(dá) 0.12mg?cm-2?h-1. ）與抗蠕變性能0 700°C/70MPa 斷裂時(shí)間 >100h ），在石油化工、鍋爐制造、航空業(yè)及其他高溫、氧化環(huán)境中得到了廣泛應(yīng)用。（剩余4208字）