Kūleʻa kila
Kila kohu ʻole: He ʻano kila i ʻike ʻia no kona kūpaʻa ʻana i ka ʻino a me ka waiwai ʻole o ka ʻōpala, aia ma ka liʻiliʻi he 10.5% chromium a me ka nui o 1.2% kalapona.
ʻO ke kila kila he mea i hoʻohana nui ʻia ma nā ʻoihana like ʻole, kaulana no kona kūpaʻa ʻana a me ka versatility. Ma waena o nā helu he nui o ke kila kila, 304, 304H, 304L, a me 316 ka mea maʻamau, e like me ka mea i hōʻike ʻia ma ka maʻamau ASTM A240/A240M no ka "Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and General. Nā noi.
Aia kēia mau papa ʻehā i ka ʻano like o ke kila. Hiki ke hoʻokaʻawale ʻia lākou ma ke ʻano he austenitic stainless steel e pili ana i ko lākou ʻano a me 300 series chromium-nickel stainless steels e pili ana i kā lākou haku mele. ʻO nā ʻokoʻa mua ma waena o lākou aia i kā lākou mea hoʻohui kemika, ka pale ʻana i ka corrosion, ka pale wela, a me nā kahua noi.
Austenitic Stainless Steel: Hoʻokumu mua ʻia me ka hoʻoheheʻe ʻana o ke aniani cubic i waena o ke alo (phase γ), non-magnetic, a hoʻoikaika nui ʻia ma o ka hana anu (no ka mea e hoʻoulu ai i ka magnetism). (GB/T 20878)
Ka Hoʻohui Kimia a me ka Hoʻohālikelike Hana (Ma muli o nā Kūlana ASTM)
304 Ke kila kila:
- Hui Nui: Loaʻa ma kahi o 17.5-19.5% chromium a me 8-10.5% nickel, me ka liʻiliʻi o ke kalapona (ma lalo o 0.07%).
- Na Waiwai Mechanical: Hōʻike i ka ikaika tensile maikaʻi (515 MPa) a me ka elongation (ma kahi o 40% a i ʻole).
304L kila kila:
- Hui Nui: E like me 304 akā me ka ho'ēmi kalapona (ma lalo o 0.03%).
- Na Waiwai Mechanical: Ma muli o ka haʻahaʻa carbon content, ʻoi aku ka haʻahaʻa o ka ikaika tensile ma mua o 304 (485 MPa), me ka elongation like. Hoʻonui ka haʻahaʻa kalapona i kāna hana kuʻi.
304H kila kila:
- Hui Nui: Loaʻa maʻamau ka maʻiʻo kalapona mai ka 0.04% a i ka 0.1%, me ka manganese i hoʻemi ʻia (i lalo i ka 0.8%) a me ka hoʻonui ʻana i ke silika (hiki i ka 1.0-2.0%). Ua like ka Chromium a me ka nickel me 304.
- Na Waiwai Mechanical: ʻO ka ikaika tensile (515 MPa) a me ka elongation e like me 304. Loaʻa ka ikaika a me ka paʻakikī i nā mahana kiʻekiʻe, e kūpono ana i nā wahi wela kiʻekiʻe.
316 Ke kila kila:
- Hui Nui: Loaʻa i ka 16-18% chromium, 10-14% nickel, a me 2-3% molybdenum, me kahi mea kalapona ma lalo o 0.08%.
- Na Waiwai Mechanical: Ka ikaika tensile (515 MPa) a me ka elongation (ʻoi aku ma mua o 40%). Loaʻa iā ia ka pale corrosion ʻoi aku.
Mai ka hoʻohālikelike ʻana ma luna, ua ʻike ʻia he ʻano ʻano mekini like loa nā papa ʻehā. Aia nā ʻokoʻa i kā lākou haku mele ʻana, e alakaʻi ana i nā ʻano like ʻole o ke kūpaʻa corrosion a me ka pale wela.
Kūleʻa Kūleʻa Kūleʻa a me ka Hoʻohālikelike Hoʻohālikelike Hoʻohālikelike
Pale ʻino:
- 316 Ke kila kila: Ma muli o ka loaʻa ʻana o ka molybdenum, ʻoi aku ka maikaʻi o ka pale ʻana i ka corrosion ma mua o ka 304 series, ʻoi aku ka kūʻē i ka corrosion chloride.
- 304L kila kila: Me kona haʻahaʻa kalapona maʻiʻo, he maikai corrosion kū'ē, kūpono no ka corrosive kaiapuni. ʻOi aku ka liʻiliʻi o kona pale ʻana i ka corrosion i ka 316 akā ʻoi aku ka maikaʻi o ke kumukūʻai.
Kū'ē wela:
- 316 Ke kila kila: ʻO kāna haku mele chromium-nickel-molybdenum kiʻekiʻe e hāʻawi i ka pale wela ʻoi aku ka maikaʻi ma mua o ka 304 stainless steel, ʻoi aku hoʻi me ka molybdenum e hoʻonui ana i kona kūpaʻa oxidation.
- 304H kila kila: Ma muli o kona kalapona kiʻekiʻe, manganese haʻahaʻa, a me ka haku silika kiʻekiʻe, hōʻike pū ʻo ia i ka pale wela maikaʻi i nā wela kiʻekiʻe.
Nā kahua hoʻohana kila kila
304 Ke kila kila: He kumu kumu kūʻai kūpono a me ka versatile, hoʻohana nui ʻia i ke kūkulu ʻana, hana ʻana, a me ka hana ʻai.
304L kila kila: ʻO ka mana haʻahaʻa-carbon o 304, kūpono no ka ʻenekinia kemika a me ka moana, me nā ʻano hana like me 304 akā ʻoi aku ka maikaʻi no nā kaiapuni e koi ana i ke kūpaʻa ʻoi aʻe a me ka ʻike kumu kūʻai.
304H kila kila: Hoʻohana ʻia i loko o ka superheaters a me ka reheater o nā boilers nui, nā paipu mahu, nā mea hoʻololi wela i ka ʻoihana petrochemical, a me nā noi ʻē aʻe e koi ana i ka pale corrosion maikaʻi a me ka hana wela kiʻekiʻe.
316 Ke kila kila: Hoʻohana maʻamau i loko o ka pulp a me ka wili pepa, ka ʻoihana kaumaha, ka hana kemika a me ka mālama ʻana i nā mea hana, nā mea hana hoʻomaʻemaʻe, nā lāʻau lapaʻau a me nā lāʻau lapaʻau, ka aila a me ke kinoea waho, nā kai moana, a me nā mea kuke kiʻekiʻe.
Ka manawa hoʻouna: Sep-24-2024