Njikwa nke igwe anaghị agba nchara intergranular corrosion, 304 igwe anaghị agba nchara, 304 igwe anaghị agba nchara na corrosion na igwe anaghị agba nchara intergranular corrosion na ụfọdụ 10%, ọ ga-eme ka adhesion nke ọka agbadala, na ọnụnọ nke nrụgide, dị nnọọ mfe ịgbawa, ọbụna crumple. , na zoro ezo, nke a na-adịghị ahụ anya site na ọdịdị ya.Ihe ndị ọzọ na-akpata corrosion na-ebutekwa ya.Intergranular corrosion nke austenitic igwe anaghị agba nchara kpatara ịda ogbenye bụ n'ụzọ dị ukwuu n'ihi oke ọka Cr, Cr na c mfe ụdị kemịkal ogige, ọdịnaya Cr.
1, chemical mejupụtara na Ọdịdị
(1) C ọdịnaya
Ọdịnaya C nke nchara mmetụta nke intergranular corrosion nke austenitic igwe anaghị agba nchara bụ ihe kacha mkpa.N'otu aka, na-achịkwa c ma debe ọdịnaya carbon na metal ntọala na mkpanaka ịgbado ọkụ na 0.08%, na metal ntọala na ihe ịgbado ọkụ na-agbakwunye ihe stabilizer nke Ti, Nb, njikọ siri ike na c, carbon tupu Cr agbụ, na-emepụta ihe kwụsiri ike. ngwakọta.
(2) nhazi nke akụkụ abụọ
Ọdịdị akụkụ abụọ ga-abawanye ike nke iguzogide corrosion intergranular.N'otu aka, sonyeere ferrite akpụ ọcha, dị ka chromium, Silicon, aluminum, molybdenum, weld guzobe nke dual-phase Ọdịdị, na ahọrọ wuo gị n'ụlọnga nwere ferrite ọzọ ịgbado ọkụ ihe.
2, teknụzụ ịgbado ọkụ
(1) okpomọkụ dị na 450 ~ 850 ℃ okpomọkụ nso, karịsịa na 650 Celsius C na-adị mfe eme intergranular corrosion ize ndụ okpomọkụ mpaghara (makwaara dị ka okpomọkụ ebe-enwe mmetụta).Igwe anaghị agba nchara, welds nwere ike iwere n'okpuru laminate, ma ọ bụ ozugbo na azụ mmiri jụrụ nke weld, ka ajụkwa ngwa ngwa, mbenata oge na okpomọkụ nso, bụ irè jikoro mma corrosion iguzogide nke nkwonkwo.
(2) mmụba nke ike ịgbado ọkụ, ga-eme ngwangwa corrosion nke austenitic igwe anaghị agba nchara.N'oge usoro ịgbado ọkụ, na ala ugbu a, elu ịgbado ọkụ ọsọ, mkpụmkpụ-arc, multiple ngafe ịgbado ọkụ usoro, na ibelata okpomọkụ.Ntinye ọkụ dị ala, site n'ụzọ nke na-achọpụta okpomọkụ ngwa ngwa iji zere corrosion intergranular nke mpaghara okpomọkụ metụtara.
Oge nzipu: Mar-12-2018