Mana o kuhiliʻole kila intergranular corrosion, 304 kuhiliʻole kila, 304 kuhiliʻole kila rust a me ka corrosion ma kuhiliʻole kila intergranular corrosion i loko o kekahi 10%, ka mea, e hana i ka adhesion o ka palaoa ua hoole, i ke alo o ke kaumaha, loa oluolu e poha, a crumple. , a huna, ike ole ia mai kona kino.Hoʻokomo pū ʻia ia e nā kumu nui ʻē aʻe o ka pala.ʻO ka corrosion intergranular o austenitic stainless steel i hoʻokumu ʻia e ka ʻilihune ma muli o nā palena palaoa Cr, Cr a me c mea maʻalahi ke hoʻohuihui kemika, ka ʻike Cr.
1, ka haku mele a me ke kinona
(1) C maʻiʻo
C maʻiʻo o ke kila hopena o intergranular corrosion o austenitic kuhiliʻole kila ka mea nui loa.Ma ka lima hoʻokahi, e hoʻopaʻa pono i ka c a mālama i ka ʻike kalapona i ka metala kumu a me ke koʻokoʻo kuʻi ma ka 0.08%, ma ke kumu metala a me nā mea hoʻohui e hoʻohui i nā mea stabilizer o Ti, Nb, pili ikaika me c, kalapona ma mua o ka Cr hoʻopaʻa ʻia, e hana ana i kahi paʻa. pūhui.
(2) hoʻolālā ʻāpana ʻelua
E hoʻonui nui ka hana ʻelua i ka hiki ke kū'ē i ka corrosion intergranular.Ma ka lima hoʻokahi, hui i ka ferrite hana mea, e like me chromium, Silicon, aluminika, molybdenum, weld kukulu ana o ka lua-phase hale, ma ka mea i waeia kukulu mea i loaʻa ferrite oi welding mea.
2, ʻenehana wiliwili
(1) ʻO ka mahana ma 450 ~ 850 ℃ ka pae wela, ʻoi aku ka maʻalahi ma 650 ° c ka mea maʻalahi loa i ka intergranular corrosion danger temperature zone (i ʻike ʻia ʻo ka wela wahi-sensitive).ʻO ke kila kila, hiki ke lawe ʻia nā welds ma lalo o ka laminate, a i ʻole pololei i ka wai hoʻoluʻu o ka weld, e hoʻomaʻalili wikiwiki, e hoʻemi ana i ka manawa i ka pae wela, he mau hana kūpono no ka hoʻomaikaʻi ʻana i ke kūpaʻa corrosion o nā hono.
(2) hoʻonui i ka ikehu laina kuʻikuʻi, e hoʻolalelale i ka corrosion o austenitic stainless steel.I loko o ke kaʻina hana kuʻi, me ka haʻahaʻa o kēia manawa, kiʻekiʻe kuʻihao wikiwiki, pōkole-arc, nui pass kuʻihao ala, a hoemi i ka wela.ʻO ka hoʻokomo wela haʻahaʻa, ma ke ʻano o ka hoʻomaʻamaʻa ʻana i ka mahana me ka wikiwiki e pale aku i ka corrosion intergranular o ka ʻāpana wela.
Ka manawa hoʻouna: Mar-12-2018