Ka hoomaopopo ana i ke kumu o ka Haahaa-Hydrogen Stick Electrodes

ʻO ka ʻike i nā kumu e pili ana i ka E7018 low-hydrogen stick electrodes hiki ke kōkua i ka hoʻomaopopo ʻana pehea e hoʻonui ai i kā lākou hana, kā lākou hana a me nā welds hiki iā lākou ke hana.

ʻO ka wili lāʻau ke kī nui no nā hana wiliwili he nui, ma ka hapa no ka hoʻomau ʻana o nā mea i hoʻohana ʻia i nā noi he nui i ke kaʻina hana, a ʻo ia ka mea i ʻike maikaʻi ʻia e nā mea hana wiliwili.I ka wā e pili ana i ka wili lāʻau, American Welding Society (AWS; Miami, FL) E7018 stick electrodes he koho maʻamau no ka mea hāʻawi lākou i nā waiwai mechanical a me nā mea kemika no nā ʻano noi like ʻole, me nā pae hydrogen haʻahaʻa e kōkua i ka pale ʻana i ka haki ʻana i ka hydrogen-induced. .

ʻO ka ʻike ʻana i nā kumu e pili ana i ka E7018 low-hydrogen stick electrodes hiki ke kōkua i ka hoʻomaopopo ʻana i kā lākou hana, hana, a me nā welds hopena.Ma ke ʻano maʻamau, hāʻawi nā electrodes lāʻau E7018 i nā haʻahaʻa spatter haʻahaʻa a me kahi arc mālie, kūpaʻa, a mālie.Hāʻawi kēia mau hiʻohiʻona metala hoʻopiha i ka mea hana welding i ka mana maikaʻi ma luna o ke arc a hōʻemi i ka pono no ka hoʻomaʻemaʻe post-weld - ʻelua mau mea koʻikoʻi i nā noi e pono ai ka nānā pono ʻana i ka maikaʻi o ka weld a me ka hoʻokomo ʻana i ka wela, a me nā mea ma nā palena paʻa.

Hāʻawi kēia mau electrodes i nā helu deposition maikaʻi a me ke komo maikaʻi ʻana, ʻo ia ka mea hiki i nā mea hana welding ke hoʻohui i nā metala weld hou aʻe i ka hui i ka manawa i hāʻawi ʻia ma mua o ka nui o nā electrodes lāʻau ʻē aʻe (e like me E6010 a i ʻole E6011), a hiki ke pale i nā hemahema weld e like me ka nele o ka hui. .ʻO ka hoʻohui ʻana o nā mea e like me ka pauka hao, manganese, a me ke silikoni i kēia mau electrodes e hāʻawi i nā pono kūʻokoʻa, me (akā ʻaʻole i kaupalena ʻia) ka hiki ke hoʻopaʻa maikaʻi ʻia ma o kekahi lepo, ʻōpala, a i ʻole unahi wili.

Hoʻomaka a hoʻomaka hou ka arc maikaʻi, e kōkua ana i ka hoʻopau ʻana i nā pilikia e like me ka porosity i ka hoʻomaka ʻana o ka weld, he pōmaikaʻi hou o E7018 stick electrodes.No ka hoʻomaha maikaʻi (hoʻomaka hou i ka arc), pono e wehe mua i ka waihona silicon i hana ʻia ma ka hope o ka electrode.He mea nui naʻe, e hōʻoia i nā koi a pau ma mua o ka wili ʻana, no ka mea, ʻaʻole ʻae kekahi mau code a i ʻole nā ​​​​kaʻina hana i ka hoʻopaʻa ʻana i nā electrodes lāʻau.

E like me ka mea i hōʻike ʻia ma kā lākou AWS hoʻohālikelike, hāʻawi nā electrodes lāʻau E7018 i ka liʻiliʻi o 70,000 psi tensile ikaika (i koho ʻia e "70") a hiki ke hoʻohana ʻia i nā kūlana kuʻi ʻana a pau (i koho ʻia e "1").ʻO ka "8" e pili ana i ka hoʻopili haʻahaʻa-hydrogen, a me ke komo ʻana o ka electrode i hāʻawi ʻia a me nā ʻano o kēia manawa e pono ai no ka hana.Me ka hoʻohālikelike AWS maʻamau, hiki i nā electrodes lāʻau E7018 ke loaʻa i nā mea koho hou e like me "H4" a me "H8" e pili ana i ka nui o ka hydrogen diffusible i nā waihona metala hoʻopiha i ka weld.No ka laʻana, hōʻike ka inoa H4 i ka waihona weld he 4 ml a i ʻole ka liʻiliʻi o ka hydrogen diffusible no 100 g o ka metala weld.

ʻO nā electrodes me kahi mea koho "R" - e like me E7018 H4R - ua hoʻāʻo ʻia a ua manaʻo ʻia e ka mea hana.No ka loaʻa ʻana o kēia inoa, pono e kūʻē ka huahana i ka makū i loko o kahi pae i hāʻawi ʻia ma hope o ka ʻike ʻia ʻana i ka wela 80 deg F a me 80 pakeneka o ka haʻahaʻa pili no ʻeiwa mau hola.

ʻO ka mea hope loa, ʻo ka hoʻohana ʻana i ka "-1" ma kahi hoʻohālikelike electrode lāʻau (e laʻa me E7018-1) ʻo ia ka huahana e hāʻawi i ka ʻoi aku ka paʻakikī o ka hopena e kōkua i ke kūʻē ʻana i nā noi koʻikoʻi a i ʻole i nā mahana haʻahaʻa.

Hiki i ka E7018 low-hydrogen stick electrodes ke hana me kahi kumu mana mau (CC) e hāʻawi ana i ke ʻano ʻokoʻa (AC) a i ʻole ka electrode kūpono (DCEP).Loaʻa i nā metala hoʻopiha E7018 nā mea hoʻopaʻa arc a/a i ʻole ka pauka hao i loko o ka uhi e kōkua i ka mālama ʻana i kahi arc paʻa i ka wā e hoʻohana ai i ka AC.ʻO ka pōmaikaʻi nui o ka hoʻohana ʻana i ka AC me E7018 electrodes ʻo ia ka hoʻopau ʻana i ka puʻu arc, hiki ke hana i ka wā o ka hoʻoheheʻe ʻana o DC me ka hoʻohana ʻana i ka grounding liʻiliʻi a i ʻole ke kuʻi ʻana i nā ʻāpana magnetized.ʻOiai ka loaʻa ʻana o nā mea hoʻopaʻa arc hou, ʻaʻole maʻalahi nā welds i hana ʻia me ka AC e like me nā mea i hana ʻia me DC, akā naʻe, ma muli o ka hoʻololi mau ʻana i ke ala o kēia manawa a hiki i 120 mau manawa i kēlā me kēia kekona.

I ka wā e kuʻi ai me ka DCEP, hiki i kēia mau electrodes ke hāʻawi i ka mana maʻalahi o ke arc a me ka weld bead ʻoi aku ka maikaʻi, no ka mea he mau ke kuhikuhi o ke kahe o kēia manawa.No nā hopena maikaʻi loa, e hahai i nā ʻōlelo aʻoaʻo a ka mea hana no nā ʻāpana hana no ke anawaena electrode.

E like me ke kaʻina hana a me ka electrode, ʻo ka ʻenehana kūpono i ka wā wili lāʻau me E7018 lāʻau electrodes mea nui e hōʻoia i ka maikaʻi weld maikaʻi.E hoʻopaʻa i ka lōʻihi o ke arc - e mālama pono i ka electrode ma luna pono o ka puddle weld - e mālama i kahi arc paʻa a hōʻemi i ka manawa no ka porosity.

I ka wā e kuʻi ai ma nā kūlana palahalaha a me ka pae, kuhikuhi/kauo i ka electrode 5 deg a 15 degere mai ke ala o ka huakaʻi e kōkua i ka hōʻemi ʻana i ka manawa o ka paʻa ʻana i ka pala i loko o ka weld.I ka wā e wili ai ma ke kūlana kū i luna, e kuhikuhi/kuki i ka electrode i luna i ka 3 deg a i ka 5 deg i ka hele ʻana i luna, a e hoʻohana i kahi ʻenehana ulana liʻiliʻi e kōkua i ka pale ʻana i ka weld mai ka haʻalulu.ʻO ka laulā o ka weld bead he ʻelua a me ka hapalua manawa o ke anawaena o ka uwea kumu o ka electrode no nā welds palahalaha a me ke alo, a ʻelua a ʻelua a ʻekolu paha manawa o ke anawaena kumu no nā welds vertical-up.

Hoʻouna pinepine ʻia nā electrodes lāʻau E7018 mai ka mea hana i loko o kahi pūʻolo hermetically i hoʻopaʻa ʻia e pale aku iā lākou mai ka pōʻino o ka makū a ʻohi.He mea nui e mālama i kēlā pūʻolo a mālama ʻia i kahi maʻemaʻe a maloʻo a mākaukau nā huahana no ka hoʻohana ʻana.Ke wehe ʻia, pono e mālama ʻia nā electrodes lāʻau me nā mīkina lima maʻemaʻe a maloʻo e pale ai i ka lepo a me nā ʻōpala mai ka hoʻopili ʻana i ka uhi a hoʻopau i ka manawa no ka ʻohi ʻana i ka wai.Pono e hoʻopaʻa ʻia nā electrodes i loko o ka umu ma nā mahana i ʻōlelo ʻia e ka mea hana ma hope o ka wehe ʻia ʻana.

Ke kuhikuhi nei kekahi mau code i ka lōʻihi o ka hiki ʻana o nā electrodes lāʻau ma waho o ka pahu i hoʻopaʻa ʻia a i ʻole ka umu hoʻopaʻa ʻana a inā a i ʻole pehea ka manawa e hiki ke hoʻoponopono hou ʻia ka metala hoʻopihapiha (ʻo ia hoʻi ma o kahi bakena kūikawā e hoʻoneʻe i ka wai i hoʻopaʻa ʻia) ma mua o ka hoʻolei ʻia.E ʻimi mau i nā kikoʻī kūpono a me nā code no nā koi o kēlā me kēia hana.


Ka manawa hoʻouna: Dec-23-2022