Welina mai i kā mākou mau pūnaewele!

He aha ka ʻokoʻa ma waena o Nichrome a me FeCrAl?

ʻO ka hoʻomaka ʻana i nā Alloy Pumehana

Ke koho ʻana i nā mea no ka hoʻomehana ʻana, ʻelua mau ala e noʻonoʻo pinepine ai:Nichrome(Nickel-Chromium) aFeCrAl(Iron-Chromium-Aluminum). ʻOiai e lawelawe ana nā mea ʻelua i nā kumu like ʻole i nā noi hoʻomehana resistive, loaʻa iā lākou nā hiʻohiʻona ʻokoʻa i kūpono iā lākou no nā kaiapuni a me nā noi. He mea koʻikoʻi ka hoʻomaopopo ʻana i kēia mau ʻokoʻa no ke koho ʻana i ka mea kūpono no kāu mau pono kikoʻī.

 

1. Hoʻohui a me nā waiwai kumu

ʻO ka Nichrome kahi nickel-chromium alloy i loaʻa i ka 80% nickel a me 20% chromium, ʻoiai aia nā lakio ʻē aʻe. Hāʻawi kēia hui i ke kūpaʻa maikaʻi i ka oxidation a mālama i ka ikaika ma nā wela kiʻekiʻe. ʻIke ʻia nā alloys Nichrome no ko lākou formability a me ka hana maʻamau ma waena o kahi ākea ākea.

FeCrAl alloys, e like me ka inoa, ua haku mua 'ia me ka hao (Fe) me ka nui o ka chromium (Cr) a me ka alumini (Al). ʻO ka haku mele maʻamau he 72% hao, 22% chromium, a me 6% alumini. Hoʻonui ka ʻike alumini i ka hana wela kiʻekiʻe o ka alloy a me ka pale ʻana i ka oxidation.

Nichrome

2. Temperature hana

ʻO kekahi o nā ʻokoʻa koʻikoʻi e pili ana i kā lākou mau wela hana kiʻekiʻe:
- Hoʻohana maʻamau ʻo Nichrome a hiki i ka 1200°C (2192°F)
- Hiki iā FeCrAl ke pale i nā mahana a hiki i 1400°C (2552°F)
ʻO kēia ka mea i ʻoi aku ka maikaʻi o FeCrAl no nā noi e koi ana i ka wela loa, e like me nā umu ahi a i ʻole nā ​​​​mea hana ʻenehana wela kiʻekiʻe.

3.Oxidation Kū'ē

Hoʻokumu ʻia nā ʻāpana ʻelua i nā papa oxide pale, akā ma o nā ʻano hana like ʻole:
- Hoʻokumu ʻo Nichrome i kahi papa chromium oxide
- Hoʻokumu ʻo FeCrAl i kahi papa alumini oxide (alumina).
ʻOi aku ka paʻa o ka papa alumina ma FeCrAl i nā wela kiʻekiʻe loa, e hāʻawi ana i ka pale lōʻihi maikaʻi aʻe mai ka oxidation a me ka corrosion. He mea koʻikoʻi kēia i ka FeCrAl i nā kaiapuni me nā mea corrosive.

4.Electrical Resistivity

ʻOi aku ka nui o ka resistivity uila iā Nichrome ma mua o FeCrAl, ʻo ia hoʻi:
- Hiki iā Nichrome ke hoʻohua i ka wela me ka nui like o kēia manawa
- Pono paha ʻo FeCrAl i ʻoi aku ka nui o kēia manawa no ka hoʻomehana like
Eia nō naʻe, piʻi nui ka resistivity o FeCrAl me ka mahana, hiki ke lilo i mea maikaʻi no kekahi mau noi hoʻomalu.

5. Mechanical Properties a me Formability

ʻOi aku ka maʻalahi o ka Nichrome a maʻalahi hoʻi e hana pū me ka lumi wela, no laila ʻoi aku ka maikaʻi no nā noi e koi ana i nā ʻano paʻakikī a i ʻole nā ​​piko paʻa. ʻOi aku ka ductile o FeCrAl i ka wā i hoʻomehana ʻia, hiki ke loaʻa i ka maikaʻi i ka wā o ka hana ʻana akā makemake paha i ka lawelawe kūikawā ma ka lumi wela.

6. Noʻonoʻo Cost

ʻOi aku ka liʻiliʻi o nā alloys FeCrAl ma mua o Nichrome no ka mea ua pani lākou i ke kumukūʻainikelame ka hao. ʻO kēia uku kumukūʻai, i hui pū ʻia me ka hana wela kiʻekiʻe, hana ʻo FeCrAl i kahi koho maikaʻi no nā noi ʻoihana he nui.

 

No ke aha e koho ai i kā mākou huahana FeCrAl?

Hāʻawi kā mākou mea hoʻomehana FeCrAl:
- ʻO ka hana wela kiʻekiʻe loa (a hiki i 1400°C)
- ʻOi aku ka maikaʻi o ka oxidation a me ka corrosion
- ʻOi aku ka lōʻihi o ke ola lawelawe ma nā kūlana koʻikoʻi
- ʻO ke kumu kūʻai ʻoi aku ka maikaʻi o nā mea hoʻohui nickel
- Nā hoʻonā kūpono no kāu pono noi kikoʻī

Inā ʻoe e hoʻolālā ana i nā umu ʻenehana, ʻōnaehana hoʻomehana, a i ʻole nā ​​​​mea hana kūikawā, hāʻawi kā mākou huahana FeCrAl i ka lōʻihi a me ka hana e pono ai no nā kaiapuni koi.Kāhea iā mā˚oui kēia lā e kūkākūkā pehea e hiki ai i kā mākou FeCrAl hoʻonā ke hoʻokō i kāu mau mea e pono ai me ka hoʻopaʻa ʻana i kāu mau koina hana.


Ka manawa hoʻouna: Apr-09-2025