Paịpụ ígwè anaghị agba nchara ugbu a na-ejikarị eme ihe, n'ihi ezigbo nguzogide nchara arụọla ọrụ dị mkpa na owuwu injinia, n'usoro mmepụta anyị chọrọ ngwọta siri ike maka nhazi tube ígwè anaghị agba nchara, isi ihe bụ iji nweta ụfọdụ martensite ịbawanye ike nke ngwaahịa, ka anyị leba anya na ngwọta nke nhazi tube ígwè anaghị agba nchara:
(1) Mgbe a gwọchara ya, a na-ekpo ọkụ ya ruo (760±15) ℃, a na-ebelatakwa ọdịnaya nke ihe ndị mejupụtara carbon na ihe ndị a gwakọtara agwakọta na tube ígwè anaghị agba nchara nke austenitic 904L n'ihi mmiri ozuzo nke Cr23C6 carbide site na tube ígwè anaghị agba nchara nke austenitic 904L ruo nkeji 90, nke mere na a na-ebuli isi ihe Ms ruo 70℃ wee jụọ oyi ruo okpomọkụ ụlọ iji nweta nhazi martensite + αferrite + residential austenitic. A gbawara austenitic fọdụrụ site na ịka nká na 510℃.
(2) mgbe e mezigharịrị okpomọkụ dị elu ma gwọọ cryogenic, e buru ụzọ kpoo ihe ngwọta ahụ ọkụ ruo 950℃ ma jide ya ruo nkeji 90. N'ihi mmụba nke Ms point, enwere ike nweta obere martensite mgbe emechara ka ọ dị jụụ ruo okpomọkụ ụlọ. Mgbe nke ahụ gasịrị, enwere ike nweta ụfọdụ martensite site na ọgwụgwọ oyi -70℃ ma jide ya ruo awa 8.
(3) Mgbe ejiri usoro mgbanwe oyi gwọọ ngwọta ahụ, martensite nke tube 904L na-enweghị ntụpọ mepụtara na-agbanwe agbanwe oyi na okpomọkụ ụlọ. Ọnụọgụ martensite nke tube 904L na-enweghị ntụpọ mepụtara n'oge mgbanwe oyi metụtara ọnụọgụ mgbanwe na ihe mejupụtara tube ígwè anaghị agba nchara 904L.
A na-ejikarị usoro atọ ndị a dị n'elu eme ihe maka ọgwụgwọ tube ígwè anaghị agba nchara, enwere m olileanya na ọ ga-enyere gị aka.
Oge ozi: Jenụwarị-29-2023