Njikwa Nrụgide Igwe anaghị agba nchara Intergranular

Njikwa nke nchara igwe anaghị agba nchara, ígwè anaghị agba nchara 304, nchara igwe anaghị agba nchara 304 na nchara na nchara igwe anaghị agba nchara n'ime nchara igwe anaghị agba nchara n'ihe dị ka 10%, ọ ga-eme ka nrapado nke ọka belata, n'ihu nrụgide, ọ dị mfe ịgbawa, ọbụna gbajie, ma zoo, a naghị ahụ ya anya site n'ụdị ya. Isi ihe ndị ọzọ na-akpata nchara na-akpatakwa ya. Nrapado dị n'etiti ígwè anaghị agba nchara nke austenitic nke ịda ogbenye kpatara bụ n'ihi oke ọka Cr, Cr na c dị mfe ịmepụta kemịkalụ, ọdịnaya Cr.

1, ihe mejupụtara kemịkalụ na nhazi ya

(1) Ọdịnaya C

Ọdịnaya C nke ígwè nke nchara dị n'etiti granular corrosion nke austenitic steel anaghị agba nchara bụ ihe kachasị mkpa. N'otu aka, chịkwaa c nke ọma ma debe ọdịnaya carbon na ígwè ntọala na mkpanaka ịgbado ọkụ na 0.08%, na ígwè ntọala na ihe njikọta na-agbakwunye ihe ndị na-eme ka ihe kwụsie ike nke Ti, Nb, njikọ siri ike na c, carbon tupu Cr ejikọta, na-emepụta ihe kwụsiri ike.

(2) nhazi usoro abụọ

Nhazi usoro abụọ ga-eme ka ikike iguzogide nchara dị n'etiti granular dịkwuo elu. N'otu aka, ejikọtara ihe ndị na-akpụ ferrite, dị ka chromium, Silicon, aluminom, molybdenum, nhazi weld nke nhazi usoro abụọ, na ihe owuwu ahọpụtara nke nwere ihe ndị ọzọ na-ejikọ ferrite.

2, teknụzụ ịgbado ọkụ

(1) okpomọkụ dị na 450 ~ 850°C, karịsịa na 650°C, bụ ihe kachasị mfe ịmepụta mpaghara okpomọkụ dị n'etiti granular corrosion (a makwaara dị ka ebe okpomọkụ na-emetụta mpaghara okpomọkụ). Enwere ike iji ihe eji agba ígwè anaghị agba nchara, welds n'okpuru laminate, ma ọ bụ ozugbo n'ime mmiri oyi nke weld, iji jụọ oyi ngwa ngwa, na-ebelata oge na oke okpomọkụ, bụ usoro dị irè maka imeziwanye iguzogide corrosion nke nkwonkwo.

(2) mmụba nke ike eriri ịgbado ọkụ, ga-eme ka nchara austenitic anaghị agba nchara rụọ ọrụ ngwa ngwa. N'oge usoro ịgbado ọkụ, yana obere ọkụ, ọsọ ịgbado ọkụ dị elu, obere arc, usoro ịgbado ọkụ ọtụtụ ugboro, ma belata okpomọkụ. Ntinye okpomọkụ dị ala, site n'iji mmetụta okpomọkụ ngwa ngwa iji zere nchara dị n'etiti mpaghara okpomọkụ metụtara.