No ke aha i hoʻopaʻa ʻole ʻia ai nā welds stainless steel single-pass me ka hoʻohana ʻana i ka FCAW i ka nānā ʻana? E nānā pono ʻo David Meyer lāua ʻo Rob Koltz i nā kumu o kēia mau hemahema.Getty Images
Q: Ke hoʻoponopono nei mākou i nā mea hao hao i hoʻopaʻa ʻia i loko o kahi ʻōnaehana maloʻo i loko o kahi ʻāina pulu. ʻAʻole i nānā ʻia kā mākou welds ma muli o ka porosity, undercuts a me nā welds māwae. 25% Carbon Dioxide kinoea no ka ʻoi aku ka maikaʻi o ka pale ʻana.
Ua ho'āʻo mākou i nā electrodes carbon steel, akā ua pau koke nā welds a uaʻike mākou i ke kila kila e hana maikaʻi. Hanaʻia nā welds a pau ma kahi pālahalaha, 3/8 iniha. hiki ke hoʻopau i kā mākou welds?
Hoʻomaka pinepine ʻia ka undercut ma muli o ke ʻano o nā ʻāpana wiliwili kikoʻī, ke ʻano kuʻihao kūpono ʻole, a i ʻole nā ​​​​mea ʻelua. ʻAʻole hiki iā mākou ke ʻōlelo i nā ʻāpana wili no ka mea ʻaʻole mākou ʻike iā lākou. lohi hele ka māmā holo.
No ka mea, ke ho'āʻo nei ka welder e waiho i ka 3/8″. ʻO ka hiki ke hoʻopau i ka lama ke kuleana no ka hoʻoheheʻe ʻana i hoʻokahi-pass me ka uea liʻiliʻi liʻiliʻi. he pilikia ʻenehana, ʻo ia ke kumu.
Hoʻokumu ʻia ka porosity ma muli o nā haumia i loko o ka weld, nalowale a i ʻole ka nui o ka pale kinoea, a i ʻole ka hoʻomaʻemaʻe nui ʻana o ka uea flux-cored. Ke ʻōlelo nei ʻoe he hana hoʻoponopono kēia ma nā pāpaʻi pulu i loko o ka mea maloʻo, no laila inā ʻaʻole i hoʻomaʻemaʻe pono ʻia nā welds. , ʻo ia paha ke kumu nui o nā hakahaka.
ʻO ka mea hoʻopiha metala āu e hoʻohana nei, ʻo ia ke kūlana flux cored wire, ʻo kēia mau ʻano uea he ʻōnaehana hoʻoheheʻe wikiwiki. Pono kēia e kākoʻo i ka puddle weld i ka wā e kuʻi pololei ai i luna a i ʻole ma luna. weld pool ma lalo iho. Inā e hoʻokuʻu ʻia nā kinoea, e paʻa mau lākou a ʻike ʻia ma hope ma ke ʻano o nā pores a i ʻole nā ​​​​ala ilo ʻili. weld i hoʻokahi pass, e like me kāu noi.
Hiki ke hoʻokumu ʻia ka weld ma ka hoʻomaka a me ka pau ʻana o ka weld ma muli o nā kumu he nui. No ka mea ke kau nei ʻoe i kahi pahu nui me kahi uwea anawaena liʻiliʻi, e ʻike paha ʻoe i ka fusion lawa ʻole (LOF) ma ke kumu o ka weld.Weld He mea maʻamau ka pohā ma muli o ke koʻikoʻi weld koena kiʻekiʻe a me LOF ma ke kumu.
No kēia nui uea, pono ʻoe e hoʻohana i ʻelua a ʻekolu paha e hoʻopau ai i ka 3/8 o ka ʻīniha. hooponopono.
Eia nō naʻe, ʻo kekahi pilikia ʻē aʻe e pāʻani nui ana i ka weld cracking, ʻo ia ka pae hewa o ka ferrite i loko o ka weld, ʻo ia ke kumu nui o ka cracking. .The kiko weld kemika o keia huahana no hoi i kekahi kumu metala dilution no elua kumu metala.No laila, ma kuhiliʻole i kalapona kila noi, kekahi mau alalai i loaa mai kuhiliʻole kila kōkua kaulike i ka kemikala haku mele 'ana a me ka'āpono nui o ferrite.Using a metala hoʻopihapiha me ka 50% ferrite, e like me 312 a i ʻole 2209, e hoʻopau i ka hiki ke haki ma muli o ka haʻahaʻa o ka ferrite.
ʻO ke ala maikaʻi loa e hāʻawi ai i ke kūpaʻa maikaʻi loa ʻo ka wili ʻana i ka hui me ke kalapona maʻamau a i ʻole ke kila kila kila a laila hoʻohui i kahi papa o ka electrode i luna. ʻaʻohe pilikia.
E ho'āʻo e hoʻololi i ka uwea anawaena nui aʻe, e like me ka 1/16 iniha a i ʻole ka nui. ʻO ka hoʻohana ʻana i ka uea flux-cored pale kinoea maikaʻi loa no ka mea hāʻawi ia i ka hoʻomaʻemaʻe weld maikaʻi a ʻoi aku ka maikaʻi o ka pale ʻana i ka ea ma mua o nā uea non-flux-cored. Akā naʻe, ma kahi o he uwea kūlana a pau, hiki i ka uwea kūlana palahalaha a me ke ākea ke hōʻemi i ka porosity a i ʻole ka nānā ʻana i ka ilo.
ʻO WELDER, ʻo Practical Welding Today ma mua, e hōʻike ana i nā poʻe maoli e hana nei i nā huahana a mākou e hoʻohana ai a hana pū me kēlā me kēia lā.
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