Nā Superalloys no nā mea hana mīkini CNC
Table of Contents
Kuʻi waenaHe aha nā Superalloys?
Ua puka mai ka huaʻōlelo "superalloy" mai ka pono o nā mea hana i nā noi kiʻekiʻe-stress, kiʻekiʻe-mahana e like me nā turbine kinoea, kahi e hiki ai i nā loli liʻiliʻi o ke kūkulu ʻana mai nā hanana e like me ka creep ke alakaʻi i ka hāʻule ʻana. ʻO ke kolo e pili ana i ka hoʻololi lohi o kahi mea ma lalo o ke kaumaha mau ma nā mahana kiʻekiʻe, a ua hana ʻia nā superalloys e hōʻemi i kēia. ʻO kā lākou microstructure, e hōʻike pinepine ana i kahi lattice kristal cubic face-centered (FCC) i hoʻopaʻa ʻia e ka nickel, e ʻae i ka ua ʻana o nā pae hoʻoikaika e like me ka gamma prime (γ'), kahi e hāʻawi ai i kā lākou hana wela kiʻekiʻe kupaianaha.
I ka mōʻaukala, ua ulu nā superalloys mai nā nickel-chromium alloys maʻalahi i nā ʻōnaehana multi-element paʻakikī. No ka laʻana, ʻo Inconel, kahi superalloy i hoʻokumu ʻia i ka nickel, hoʻohui i ka nickel me ka chromium no ka hoʻoikaika ʻana i ke kūpaʻa ʻana i ka pala. I kēia lā, he 40-50% o ke kaumaha o nā ʻenekini mokulele kalepa lākou, e hōʻike ana i ko lākou kuleana koʻikoʻi i ka mokulele. Ma waho aʻe o ka aerospace, he mea nui nā superalloys i nā mea kanu mana wela o ka lā, nā mea hoʻololi wela hana kaumaha, a me nā mīkini rocket, kahi e hiki ai iā lākou ke hana i nā hoʻonohonoho corrosive a wela paha i hiki ʻole ke hana.
I nā ʻano hana hana, koho ʻia nā superalloys no ko lākou hiki ke mālama i ke kūpaʻa dimensional a me ka pono mechanical. Eia nō naʻe, hele mai kēia me nā pānaʻi i ka machinability, ʻoiai ʻo ko lākou mau ikaika—e like me ka paʻakikī a me ka conductivity thermal haʻahaʻa—e kūʻē iā lākou i nā kaʻina hana ʻoki kuʻuna.
Hoʻomaka ka hoʻomaopopo ʻana i nā superalloys me ka mahalo ʻana i kā lākou haku mele ʻana: hāʻawi ka nickel i ke kumu no ke kūpaʻa wela, ʻoiai nā mea hoʻohui e like me ka alumini a me ka titanium e hana i nā hui intermetallic e hoʻoikaika i ka ikaika.
Nā Waiwai o nā Superalloys
ʻO nā waiwai kūikawā o nā superalloys mai kā lākou mau haku mele i hana pono ʻia, e hiki ai iā lākou ke lanakila ma mua o nā alloys maʻamau i nā wahi koi. ʻO nā waiwai koʻikoʻi:
- ʻO ka ikaika a me ke kūpaʻa kiʻekiʻeMālama nā Superalloys i ka ikaika tensile, yield, a me ka luhi ma nā mahana a hiki i 870°C a ʻoi aku paha. No ka laʻana, hōʻike nā alloys nickel-based e like me Rene 41 i ka ikaika koʻikoʻi no nā mīkini rocket. Hoʻokō ʻia kēia ma o ka hoʻoikaika ʻana i ka hopena paʻa a me ka hoʻopaʻakikī ʻana o ka ua, kahi e kūʻē ai nā pae e like me γ' i ka neʻe ʻana o ka dislocation.
- ʻO ke kū'ēʻana i kaʻinoʻino a me ka oxidationHoʻokumu nā mea e like me ka chromium i nā papa oxide pale, e pale ana i ka hōʻino ʻia ʻana i nā lewa ʻino. ʻO Hastelloy C-276, no ka laʻana, ʻoi aku ka maikaʻi i ka hana kemika ma muli o kona kūpaʻa ʻana i ka pitting a me ka stress-corrosion cracking.
- Kūʻē KuʻekuʻeHoʻemi nā Superalloys i ka deformation ma lalo o nā kūlana hoʻoluhi kiʻekiʻe no ka manawa lōʻihi, he mea nui ia no nā pahi turbine e hana mau ana i nā mahana kiʻekiʻe.
- Mechanical ToughnessHāʻawi lākou i ke kūpaʻa kiʻekiʻe o ka ʻaʻahu a me ka biocompatibility, e kūpono ai no nā implants lapaʻau.Hāʻawi nā mea hoʻohui i hoʻokumu ʻia i ka cobalt, e like me Stellite, i ke ola luhi maikaʻi loa.
- Ka Hoʻokele Haʻahaʻa a me ka Hoʻonui ʻanaKōkua kēia waiwai i ka hoʻokele wela akā pilikia i ka wā o ka mīkini ʻana, ʻoiai ke kau nei ka wela ma kahi ʻoki.
- ʻAno Abrasive a me AdhesiveʻOiai he pono no ke kūpaʻa, hoʻolalelale kēia mau ʻano i ka hoʻohana ʻana o ka mea hana i nā hana CNC.
ʻO kēia mau waiwai e hoʻolilo i nā superalloys i mea kūpono no nā noi e pono ai ke ola lōʻihi a me ka hilinaʻi, akā koi pū lākou i nā hoʻolālā mīkini holomua e lawelawe i nā pilikia e like me ka paʻakikī ʻana o ka hana, kahi e paʻakikī ai ka mea i ka wā o ka deformation.
Ma keʻano holoʻokoʻa, ke kau nei ke kaulike o ka ikaika, ke kū'ē, a me ke kūpaʻa i nā superalloys he mea nui no ka hoʻokuke ʻana i nā palena ʻenehana.
Nā ʻano o Superalloys
Ua hoʻokaʻawale ʻia nā Superalloys ma muli o kā lākou metala kumu mua, kēlā me kēia ʻano e hāʻawi ana i nā pono kūikawā no nā noi kikoʻī. Hōʻike ʻo Elimold, kahi mea lawelawe mīkini, i ʻelima mau ʻano nui: nickel-based, hao-based, cobalt-based, titanium-based, a me niobium-based.
- Nā Kūleʻa Kūlana NikelaʻO ka mea maʻamau, aia ma ka liʻiliʻi he 50% nickel me nā mea hoʻohui e like me ka alumini, titanium, a me chromium. ʻO nā hiʻohiʻona e komo pū me Inconel 718 (i hoʻohana ʻia ma ka aerospace no kona ikaika creep-rupture) a me Hastelloy C-22 (no ke kūpaʻa ʻana i ka corrosion i nā wahi kemika). ʻOi aku ko lākou kūpaʻa i ka palaho wela kiʻekiʻe, kūpono no nā pahi turbine a me nā mīkini jet. Hāʻawi nā moʻo e like me Monel lāua ʻo Nimonic i nā ʻano like ʻole no nā pono kikoʻī, e like me Monel K500 no nā noi moana.
- Nā Kūʻai Kūʻai HaoHoʻohui kēia i ka hao me ka nickel a i ʻole chromium, e hāʻawi ana i ka pono kumukūʻai a me ke kūpaʻa ʻana i ka ʻaʻahu. Hoʻohana ʻia lākou i nā bearings mokulele a me nā ʻāpana i loaʻa i ka friction. Hāʻawi nā hiʻohiʻona e like me Incoloy 909 i ka ikaika maikaʻi akā ʻaʻole i kūpaʻa i ka wela ma mua o nā ʻano nickel.
- Nā Kūlana Kūlana Kūlana KobaltLoaʻa i kēia mau mea hao he 50-60% cobalt me ka chromium a me ka tungsten, ʻoi aku ka ikaika o kēia mau mea hao ma nā mahana koʻikoʻi a me ke kūpaʻa maikaʻi loa i ka pala. Hoʻopili ʻia nā moʻo Stellite, e like me Stellite 6, i nā ʻāpana turbine kinoea i hōʻike ʻia i ka lewa. Loaʻa iā lākou ke ola luhi ʻoi aku ka maikaʻi ma mua o nā ʻano i hana ʻia me ka hao a i ʻole ka nikala.
- Nā Superalloys i hoʻokumu ʻia ma TitaniumMe ka titanium me ka molybdenum e hōʻemi i ka modulus elastic, ua ʻike ʻia kēia mau mea no ka paʻakikī kiʻekiʻe. Hoʻohana nui ʻia ʻo Ti6Al4V i nā kahua aerospace a me nā biomedical no kona biocompatibility a me ka ratio ikaika-a-kaumaha.
- Nā Superalloys i hoʻokumu ʻia i ka NiobiumʻO ka hui pinepine ʻana o ka niobium-nickel, mālama lākou i ka ikaika ma nā mahana kiʻekiʻe ma mua o nā mea hoʻohuihui nickel maʻemaʻe, ʻoiai me ka ikaika holoʻokoʻa haʻahaʻa. Loaʻa iā lākou ka hoʻohana ʻana i nā mīkini jet a me nā rockets no ko lākou kūpaʻa wela.
ʻO nā mea hoʻohuihui kaulana ʻē aʻe e komo pū ana me Waspaloy (nickel-based no nā turbines kinoea) a me Rene series (no ka aerospace wela kiʻekiʻe). Pono kēlā me kēia ʻano i nā ʻano CNC i hana ʻia ma muli o ka paʻakikī like ʻole a me nā waiwai wela. ʻO ke koho ʻana i ke ʻano kūpono e pili ana i ke kaupaona ʻana o ke kumukūʻai, ka hana, a me ka maʻalahi o ka mīkini.
ʻO ka nānā ʻana i ka mīkini CNC
He hana hana subtractive ka mīkini CNC kahi e wehe ai nā mea hana i kāohi ʻia e ka kamepiula i nā mea mai kahi ʻāpana hana e hana i nā ʻāpana kikoʻī. Hoʻopuni ia i nā hana e like me ka wili ʻana (nā mea ʻoki e hoʻohuli ana no nā ʻano paʻakikī), ka hoʻohuli ʻana (ka hoʻohuli ʻana i ka ʻāpana hana e kūʻē i kahi mea hana paʻa), ka wili ʻana, a me nā ʻano hana holomua e like me ka mīkini 5-axis no nā geometries paʻakikī.
No nā superalloys, he mea nui ka CNC ma muli o ka pono no ka pololei kiʻekiʻe i nā ʻāpana e like me nā pahi turbine. ʻO nā lawelawe e like me nā mea mai Elimold e komo pū me ka wili ʻana o 3- a 5-axis, ka mīkini Swiss no nā ʻāpana lahilahi, a me ka uea EDM no nā hoʻomanawanui paʻa (± 0.0001″).
He mea nui nā mīkini paʻa kiʻekiʻe me nā wili paʻa no ka lawelawe ʻana i ka paʻakikī o nā mea.
Nā pilikia i ka hana ʻana i nā Superalloys
He mea paʻakikī loa ka hana ʻana i nā superalloys ma o CNC ma muli o ko lākou mau waiwai. ʻO nā pilikia nui:
- Hoopaa hanaPaʻakikī koke ka mea ma kahi ʻoki, e hoʻonui ana i ka ʻaʻahu o ka mea hana.
- Na Puali Oki KiekieʻO ko lākou ikaika e pono ai ka ikaika nui aku, e hoʻokaumaha ana i nā mea hana a me nā mīkini.
- Nā pilikia hoʻomalu welaHoʻopaʻa ka diffusivity thermal haʻahaʻa i ka wela i loko o ka ʻāpana ʻoki, e alakaʻi ana i ka hōʻino ʻana o ka mea hana a me ka hoʻopilikia ʻana o ka workpiece.
- Nā ʻāpana ʻāwili a me ka lihi i kūkulu ʻia: Hoʻopili nā ʻāpana gummy i nā mea hana, e hana ana i nā lihi e hōʻino ana i ka hoʻopau a me ka pololei.
- Hoʻolalelale i ka ʻaʻahu ʻana o nā mea hanaʻO nā carbides paʻakikī a me nā intermetallics ke kumu o ka wikiwiki o ka ʻaʻahu ʻana, e hoʻopōkole ana i ke ola o ka mea hana.
- Ka Haʻalulu a me ke Koena KoenaHoʻoulu nā mana kiʻekiʻe i ke kamaʻilio ʻana, e hoʻopilikia ana i nā hoʻomanawanui, ʻoiai ʻo ka wela e hoʻoulu ai i nā pilikia e hōʻemi ana i ke ola luhi.
Hoʻopilikia pinepine nā lako CNC kuʻuna me kēia mau mea, e koi ana i ka ʻike kūikawā. Hāʻawi nā koho ʻē aʻe e like me PECM i ka mīkini ʻaʻohe pili e pale aku i kēia mau pilikia, e hana ana i nā ʻili laumania me ka ʻole o nā wahi i hoʻopilikia ʻia e ka wela.
Nā ʻenehana mīkini a me nā hana maikaʻi loa
No ka hoʻoponopono ʻana i nā pilikia, e hoʻohana i kēia mau ʻano hana:
- Koho Mea HanaE hoʻohana i nā mea hoʻokomo carbide i uhi ʻia no ka roughing, nā keramika no ka hoʻopau ʻana, a me PCBN no ka ultra-precision. Hoʻemi nā kihi rake maikaʻi a me nā mea haki chip i nā ikaika.
- Nā ʻāpana i hoʻopaʻa ʻia: Nā wikiwiki haʻahaʻa (e pale i ka hōʻiliʻili ʻana o ka wela), nā hānai kaulike, a me nā hohonu i kāohi ʻia. He mea nui ka hoʻāʻo hou ʻana.
- Nā Kūlana HoʻoluʻuʻO ka mea hoʻomaʻalili ma o ka mea hana me ke kaomi kiʻekiʻe (70+ bar) no ka hoʻomaʻalili ʻana a me ka hoʻoneʻe ʻana i nā ʻāpana; MQL no ka lubrication aloha kaiapuni.
- Mīkini a me ka Hoʻopaʻa ʻanaNā mīkini CNC paʻa kiʻekiʻe me ka hoʻēmi ʻana i ka haʻalulu; nā mea paʻa e hōʻemi i ke kamaʻilio ʻana.
- Hoʻolālā a me ka Hana Ma hope: DFM me nā radii ākea; nā lāʻau wela ma hope o ka mīkini no ka hoʻomaha ʻana i ke kaumaha; NDT no ka maikaʻi.
- wahi: E noʻonoʻo i ka hoʻolei hoʻopukapuka kālā no nā ʻano kokoke i ka ʻupena e hōʻemi i nā pono CNC. Ke hoʻololi nei nā mea hana carbide hou a me nā coolants holomua i ke kahua.
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