Ipayipi lensimbi engagqwali manje selisetshenziswa kabanzi, ngenxa yokumelana nokugqwala okuhle lidlale indima ebalulekile ekwakhiweni kobunjiniyela, enkambisweni yokukhiqiza sidinga ikhambi eliqinile lokucubungula amashubhu ensimbi engagqwali, inhloso eyinhloko ukuthola i-martensite ethile yokwandisa ubulukhuni bemikhiqizo, ake sibheke ikhambi lokucubungula amashubhu ensimbi engagqwali:
(1) Ngemva kokwelashwa ngesisombululo, sishiswa ku-(760±15) ℃, futhi okuqukethwe kwekhabhoni nezinto ezihlanganisiwe kushubhu lensimbi engagqwali le-austenitic 904L kuncishisiwe ngenxa yokuna kwe-Cr23C6 carbide kusuka kushubhu lensimbi engagqwali le-austenitic 904L imizuzu engama-90, ukuze iphuzu le-Ms liphakanyiswe ku-70℃ bese lipholiswa ekushiseni kwegumbi ukuze kutholakale isakhiwo se-martensite + αferrite + residual austenitic. I-austenite esele yabola ngokuguga ku-510℃.
(2) ngemva kokulungiswa kwezinga lokushisa eliphezulu kanye nokwelashwa kwe-cryogenic, ikhambi laqala lashiswa laya ku-950℃ futhi lagcinwa imizuzu engama-90. Ngenxa yokwanda kwe-Ms point, inani elincane le-martensite lingatholakala ngemva kokupholisa ekamelweni lokushisa. Ngemva kwalokho, inani elithile le-martensite lingatholakala ngokwelashwa okubandayo okungu-70℃ bese ligcinwa amahora angu-8.
(3) Ngemva kokwelashwa kwesisombululo ngendlela yokuguqulwa okubandayo, i-martensite eyakhiwe yi-904L seamless tube ikhubazeka emazingeni okushisa asekamelweni. Inani le-martensite eyenziwe yi-904L seamless tube ngesikhathi sokuguqulwa okubandayo lihlobene nenani lokuguqulwa kanye nokwakheka kwe-904L stainless steel tube.
Izindlela ezintathu ezingenhla zivame ukusetshenziswa njengendlela yokwelapha isixazululo se-stainless steel tube enethemba lokukulethela usizo.
Isikhathi sokuthunyelwe: Jan-29-2023