Umbhobho wentsimbi engagqwali ngoku usetyenziswa kakhulu, ngenxa yokumelana kwawo nokugqwala okuhle udlale indima ebalulekileyo kulwakhiwo lobunjineli, kwinkqubo yemveliso sidinga isisombululo esiqinileyo sokucubungula ityhubhu yentsimbi engagqwali, injongo ephambili kukufumana i-martensite ethile yokwandisa ubulukhuni beemveliso, makhe sijonge isisombululo sokucubungula ityhubhu yentsimbi engagqwali:
(1) Emva konyango lwesisombululo, ifudunyezwa ukuya kwi (760±15) ℃, kwaye umxholo wekhabhoni kunye nezinto ezixutyiweyo kwityhubhu yentsimbi engagqwali ye-austenitic 904L uyancitshiswa ngenxa yokuna kwe-Cr23C6 carbide kwityhubhu yentsimbi engagqwali ye-austenitic 904L kangangemizuzu engama-90, ukuze i-Ms point iphakanyiswe ukuya kwi-70℃ ize ipholiswe kubushushu begumbi ukuze kufunyanwe isakhiwo se-martensite + αferrite + residual austenitic. I-residual austenite yabola ngokuguga kwi-510℃.
(2) emva kokulungiswa kobushushu obuphezulu kunye nonyango lwe-cryogenic, isisombululo saqala safudunyezwa ukuya kwi-950℃ saza sagcinwa imizuzu engama-90. Ngenxa yokwanda kwe-Ms point, inani elincinci le-martensite linokufunyanwa emva kokupholisa ukuya kubushushu begumbi. Emva koko, inani elithile le-martensite linokufunyanwa ngonyango olubandayo lwe--70℃ kwaye lugcinwe iiyure ezi-8.
(3) Emva konyango lwesisombululo ngendlela yokuguqulwa kwe-cold deformation, i-martensite eyenziwe yi-904L seamless tube ikhubazeka kubushushu begumbi. Ubungakanani be-martensite eyenziwe yi-904L seamless tube ngexesha lokuguqulwa kwe-cold buhambelana nobungakanani bokuguqulwa kunye nokwakheka kwe-904L stainless steel tube.
Ezi ndlela zintathu zingentla zisetyenziswa kakhulu njengendlela yokunyanga isisombululo setyhubhu yentsimbi engagqwaliyo, ndinethemba lokukunceda.
Ixesha lokuthumela: Jan-29-2023