Ko te putorino kowiri tira inaianei ka nui ake te whakamahia, na te pai o te aukati i te waikura kua whai waahi nui ki te hanga miihini, i roto i te mahinga o te whakaputa ka hiahia tatou ki te otinga totoka mo te tukatuka ngongo kowiri tira, ko te kaupapa matua ko te whiwhi i etahi hua martensite. te pakeke o nga hua, me titiro ki te otinga o te tukatuka ngongo kowiri tira:
(1) I muri i te maimoatanga otinga, ka wera ki te (760 ± 15) ℃, ka whakahekehia te ihirangi o te waro me nga mea whakauru i roto i te ngongo kowiri tira austenitic 904L na te rerenga o te Cr23C6 carbide mai i te ngongo kowiri tira austenitic 904L mo 90min, kia hiki te tohu Ms ki te 70 ℃ ka whakamatao ki te pāmahana rūma ki te whiwhi martensite + αferrite + hanganga austenitic toenga.Ko te toenga o te austenite i pirau na te koroheketanga i te 510 ℃.
(2) i muri i te whakarereketanga teitei o te pāmahana me te maimoatanga cryogenic, ka wera tuatahi te otinga ki te 950 ℃ ka mau mo te 90min.Na te pikinga o te tohu Ms, ka taea te whiwhi i te iti o te martensite i muri i te whakamahana ki te pāmahana rūma.I muri i tera, ka taea te whiwhi i te nui o te martensite ma te -70 ℃ maimoatanga makariri me te pupuri mo te 8h.
(3) I muri i te maimoatanga otinga i te tikanga deformation matao, te martensite hanga e 904L ngongo tui he matao deformed i te pāmahana rūma.Ko te nui o te martensite i hangaia e te 904L ngongo korekore i te wa o te huringa makariri e pa ana ki te nui o te rereketanga me te hanganga o te ngongo kowiri tira 904L.
Ko nga tikanga e toru i runga ake nei e whakamahia nuitia ana he kowiri tira ngongo otinga maimoatanga tikanga tumanako ki te kawe awhina ki a koe.
Te wa tuku: Hanuere-29-2023