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 kila i loko o kahi ʻōnaehana maloʻo i loko o kahi ʻāina pulu. Ua hāʻule kā mākou welds i ka nānā ʻana ma muli o ka porosity, undercuts a me nā welds māwae.
Ua ho'āʻo mākou i nā electrodes carbon steel, akā ua pau koke nā welds a ua loaʻa iā mākou ke kila kila e hana maikaʻi. Hana ʻia nā welds a pau ma kahi pālahalaha a he 3/8 ″ ka lōʻihi.
ʻO ka undercut ka mea maʻamau ma muli o ke ʻano o ka hoʻohālikelike ʻana i nā ʻāpana wiliwili, ka ʻenehana hoʻoheheʻe kūpono ʻole, a i ʻole nā ​​​​mea ʻelua. ʻAʻole hiki iā mākou ke ʻōlelo i nā ʻāpana kuʻihao no ka mea ʻaʻole mākou ʻike iā lākou.
Mai ka welder e ho'āʻo ana e waiho 3/8 ″. ʻO ka hiki o ka overhandling i ka lama ke kuleana hapa no ka hoʻoheheʻe hoʻokahi-pass fillet me ka liʻiliʻi liʻiliʻi flux-cored uea. Akā naʻe, ʻike ʻia ke hoʻohana ʻana i ka mea hana hewa ma ka hana ma mua o kahi 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 nui o ka moisture absorption o flux-cored wire.You ʻōlelo ʻo ia ka hana hoʻoponopono i ka pāpaʻi pulu i loko o ka mea maloʻo, no laila inā ʻaʻole hoʻomaʻemaʻe ʻia nā welds, ʻo ia paha ke kumu nui o nā hakahaka.
ʻO ka metala hoʻopihapiha āu e hoʻohana nei, ʻo ia ke kūlana flux cored wire, kēia mau ʻano uea i kahi ʻōnaehana hoʻoheheʻe wikiwiki. e ho'āʻo ana e waiho i kahi weld nui i hoʻokahi pass, e like me kāu noi.
Hiki ke hana 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 uea anawaena liʻiliʻi, e ʻike paha ʻoe i ka fusion lawa ʻole (LOF) ma ke kumu o ka weld.
No kēia nui uea, pono ʻoe e hoʻohana i ʻelua a ʻekolu paha e hoʻopau ai i ka 3/8 o ka ʻīniha.
Eia nō naʻe, ʻo kekahi pilikia ʻē aʻe e pāʻani nui i ka weld māwae, ʻo ia ka pae hewa ʻole o ka ferrite i ka weld, ʻo ia ke kumu nui o ka cracking.309L uea i kūkulu ʻia no ka wili ʻana i ke kila kuhiliʻole i ke kila kalapona ma mua o ke kila kalapona i ke kalapona kila. ka nui o ka ferrite. ʻO ka hoʻohana ʻana i ka metala hoʻopiha me kahi 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 hoʻolako ai i ke kūpaʻa maikaʻi loa ʻo ia ka weld i ka hui me kahi kalapona maʻamau a i ʻole ke kila kila kila a laila hoʻohui i kahi papa o ka electrode i luna.
E ho'āʻo e hoʻololi i ka uea anawaena nui aʻe, e like me 1/16 iniha a ʻoi aku paha. He mea kūpono ka hoʻohana ʻana i ka uea flux-cored i pale ʻia i ke kinoea no ka mea ʻoi aku ka maikaʻi o ka hoʻomaʻemaʻe weld a ʻoi aku ka maikaʻi o ka pale ʻana i ka ea ma mua o ka uea non-flux-cored. Akā naʻe, ma kahi o kahi uea kūlana āpau, hiki i kahi uea kūlana paʻa a me ka paepae ke hōʻemi i ka porosity a i ʻole ka worm tracking. You should also change the 3309L
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