Hoʻolauna
ʻO ka papa 304 ka maʻamau "18/8" kulika;ʻo ia ka mea maʻalahi a hoʻohana nui ʻia i ke kila kila, i loaʻa i ka nui o nā huahana, nā ʻano a me nā hoʻopau ʻana ma mua o nā mea ʻē aʻe.Loaʻa iā ia ka maikaʻi o ka hoʻokumu ʻana a me nā hiʻohiʻona wili.ʻO ke ʻano austenitic kaulike o ka Papa 304 hiki iā ia ke huki hohonu loa me ka ʻole o ka annealing waena, ka mea i hoʻomake i kēia papa i ka hana ʻana i nā ʻāpana kuihi huki e like me nā poho, nā mea hollow-ware a me nā ipu.No kēia mau noi he mea maʻamau ka hoʻohana ʻana i nā ʻano like ʻole "304DDQ" (Deep Drawing Quality).Mākaukau ʻo Papa 304 e wāwahi a ʻōwili ʻia i loko o nā ʻāpana like ʻole no nā noi ma ka ʻoihana ʻoihana, hale kūkulu hale, a me nā kahua kaʻa.Loaʻa i ka papa 304 nā hiʻohiʻona wiliwili maikaʻi loa.ʻAʻole koi ʻia ka annealing post-weld i ka wā e wili ai i nā ʻāpana lahilahi.
ʻAʻole koi ka papa 304L, ka mana kalapona haʻahaʻa o 304, i ka hoʻopili ʻana ma hope o ka weld a no laila ua hoʻohana nui ʻia i nā ʻāpana ana kaumaha (ma kahi o 6mm).ʻO ka papa 304H me kāna ʻike kalapona kiʻekiʻe e loaʻa ka noi ma nā mahana kiʻekiʻe.Hāʻawi ka ʻōnaehana austenitic i kēia mau māka i ka paʻakikī maikaʻi loa, a hiki i nā mahana cryogenic.
Na Waiwai Ki
Kuhi ʻia kēia mau waiwai no ka huahana ʻōwili palahalaha (pālaʻi, pepa a me ka coil) ma ASTM A240/A240M.Ua kuhikuhi ʻia nā waiwai like akā ʻaʻole like no nā huahana ʻē aʻe e like me ka paipu a me ka bar i kā lākou mau kikoʻī.
Huina
Hāʻawi ʻia nā pae haku mele maʻamau no ka papa 304 i ka papa 1.
Papa | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
304 | min. max. | - 0.08 | - 2.0 | - 0.75 | - 0.045 | - 0.030 | 18.0 20.0 | - | 8.0 10.5 | - 0.10 |
304L | min. max. | - 0.030 | - 2.0 | - 0.75 | - 0.045 | - 0.030 | 18.0 20.0 | - | 8.0 12.0 | - 0.10 |
304H | min. max. | 0.04 0.10 | - 2.0 | - 0.75 | -0.045 | - 0.030 | 18.0 20.0 | - | 8.0 10.5 |
Papa 1.Nā papa hana no 304 grade stainless steel
Na Waiwai Mechanical
Hāʻawi ʻia nā ʻano mīkini maʻamau no ka papa 304 stainless steel ma ka papa 2.
Papa 2.Mechanical waiwai o 304 grade kuhiliʻole kila
Papa | Ka U'i (MPa) min | ʻO ka ikaika 0.2% Hōʻoia (MPa) min | Elongation (% ma 50mm) min | ʻoʻoleʻa | |
ʻO Rockwell B (HR B) max | Brinell (HB) max | ||||
304 | 515 | 205 | 40 | 92 | 201 |
304L | 485 | 170 | 40 | 92 | 201 |
304H | 515 | 205 | 40 | 92 | 201 |
Loaʻa iā 304H kahi koi no ka nui o ka palaoa o ASTM No 7 a i ʻole coarser. |
Pale ʻino
Maikaʻi ma kahi ākea o nā kaiapuni lewa a me nā media corrosive he nui.Ma muli o ka ʻinoʻino ʻana o ka lua a me ka ʻāʻī i loko o nā kaiapuni chloride mahana, a me ke koʻikoʻi i ka pohā ʻino ma luna o 60°C.Manaʻo ʻia he kūpaʻa ʻole i ka wai inu a hiki i ka 200mg/L chlorides i nā mahana ambient, e hōʻemi ana i kahi 150mg/L ma 60°C.
Kū'ē wela
ʻO ke kūpaʻa oxidation maikaʻi i ka lawelawe intermittent i 870 ° C a ma ka lawelawe mau ʻana i 925 ° C.ʻAʻole ʻōlelo ʻia ka hoʻohana mau ʻana o 304 i ka laulā 425-860°C inā he mea nui ka pale ʻana i ka wai ma hope.ʻOi aku ka paʻa o ka papa 304L i ka ua carbide a hiki ke hoʻomehana ʻia i ka pae wela o luna.
ʻOi aku ka ikaika o ka papa 304H i nā mahana kiʻekiʻe no laila hoʻohana pinepine ʻia no nā noi hoʻolālā a me ke kaomi ʻana ma nā mahana ma luna o 500°C a hiki i kahi 800°C.E lilo ana ka 304H i ka sensitized i ka pae wela o 425-860 ° C;ʻAʻole kēia he pilikia no nā noi wela kiʻekiʻe, akā e hopena i ka hoʻemi ʻana i ke kūpaʻa aqueous corrosion.
Hoʻomaʻamaʻa Wela
Hoʻoponopono Hoʻoponopono (Annealing) - E wela i ka 1010-1120 ° C a maʻalili wikiwiki.ʻAʻole hiki ke hoʻopaʻakikī ʻia kēia mau māka e ka mālama wela.
wiliwili
ʻO ka weldability maikaʻi loa e nā ʻano fusion maʻamau, me nā metala hoʻopiha a me ka ʻole.AS 1554.6 pre-qualifies wiliwili o 304 me ka Papa 308 a me 304L me 308L kookoo a electrodes (a me ko lakou kiʻekiʻe silicon like).Pono paha nā ʻāpana welded kaumaha ma ka Papa 304 i ka hoʻopili ʻana ma hope o ka weld no ka pale ʻana i ka corrosion kiʻekiʻe.ʻAʻole koi ʻia kēia no ka Papa 304L.Hiki ke hoʻohana ʻia ka papa 321 ma ke ʻano he ʻokoʻa i ka 304 inā koi ʻia ka wiliwili ʻāpana kaumaha a ʻaʻole hiki ke mālama i ka wela ma hope o ka weld.
Nā noi
Loaʻa nā noi maʻamau:
ʻO nā lako hana meaʻai, ʻo ia hoʻi ma ka hana pia, ka hana waiū a me ka hana waina.
ʻO nā noho kīʻaha, nā poho, nā pā, nā lako a me nā mea hana
ʻO nā papa hana hoʻolālā, nā ala hao a me nā ʻoki
ʻO nā pahu kemika, me ka lawe ʻana
Mea Hoʻololi Wela
ʻO nā pale i ulana ʻia a welded paha no ka ʻeli ʻana, ka ʻeli ʻana a me ka kānana wai
Nā mea hoʻopaʻa kaula
Puna