He aha ke kila weathering


E like me kā mākou i ʻōlelo ai, kapa ʻia ke kila welu. I ka pōkole, e ʻike ʻoe he hōʻailona kēia kila o ka United States Steel Corporation. ʻO ka pilikia me nā mea kūkulu hale, ʻo ia ka manawa e ʻike pinepine ai ʻoe i kahi papa o ka ʻōpala ma luna o lākou. No ka nui o kou hoʻāʻo ʻana e hoʻōki, e kolo ana ia i loko. ʻO ia ke kumu i puka mai ai ka manaʻo o US Steel. Ma ka hāʻawi ʻana i nā mea nānā maka, hiki iā lākou ke pale i kēlā papa lepo mai ka hana ʻana. ʻAʻole ʻo ia wale nō, ke pale aku nei i ke kila mai ka pōʻino hou aku. No laila ʻaʻole pono ʻoe e hopohopo no ke kiʻi ʻana iā ia i kēlā me kēia manawa.


No laila, ʻoiai he mea maikaʻi loa ia i ka ʻoiaʻiʻo, pono ʻoe e kau i nā mea i ke kuanaʻike maoli. ʻO kēia no ka mea ʻoiai e hoʻomau ka mānoanoa o ka ʻōpala, e mānoanoa ke kila me ka manaʻo ʻole e lilo i paʻa. Ma hope o ka hōʻea ʻana i ka wahi haʻihaʻi, hoʻoheheʻe ke kila a laila pono e hoʻololi. ʻO ia ke kumu he mea nui e hoʻomanaʻo i nā ʻokoʻa o nā kūlana kaiapuni i ke koho ʻana i kēia ʻano kila.

Pehea ka hana ʻana o ke kila welu?

ʻO nā kila haʻahaʻa haʻahaʻa a pau a i ʻole ka nui o ka ʻeleʻele ma muli o ke alo o ka ea a me ka maʻa. ʻO ka nui o ka hana ʻana e pili ana i kona ʻike ʻana i ka wai, ka oxygen a me nā mea haumia o ka lewa e pā ana i ka ʻili. Ke holo nei ke kaʻina hana, hana ka ʻōpala i mea pale e pale ai i nā mea haumia, ka wai a me ka oxygen mai ke kahe ʻana. E kōkua nō hoʻi kēia i ka hoʻopaneʻe ʻana i ke kaʻina hana ʻōpala i kekahi ʻano. I ka wā lōʻihi, ua hoʻokaʻawale ʻia kēia papa ʻōpala mai ka metala. E like me kāu e hoʻomaopopo ai, he pōʻai hou kēia.

I ka hihia o Weathering kila, akā naʻe, hana ʻokoʻa nā mea. ʻOiai e hoʻomaka ana ke kaʻina hana ʻōpala ma ke ʻano like, e ʻokoʻa iki ka holomua. ʻO kēia ke kumu no ka hana ʻana o nā mea hoʻohui i ke kila i kahi papa paʻa o ka ʻōpala e pili ana i ka metala kumu. E kōkua kēia i ka hana ʻana i kahi pale pale e pale aku i ke komo hou ʻana o ka makū, ka oxygen a me nā mea haumia. ʻO ka hopena, hiki iā ʻoe ke ʻike i ka haʻahaʻa haʻahaʻa haʻahaʻa loa ma mua o ka mea maʻamau i loaʻa me nā kila hana maʻamau.

Metallurgy of weathering steel (weathering steel)


ʻO ka ʻokoʻa maʻamau āu e ʻike ai ma waena o nā kila hoʻolālā maʻamau a me ka hoʻopili ʻana i nā mea keleawe, chromium a me nickel alloy. E kōkua kēia i ka hoʻoikaika ʻana i ke kūpaʻa ʻino o ke kila welu. Ma ka ʻaoʻao ʻē aʻe, ke hoʻohālikelike ʻia nā kila hoʻolālā maʻamau a me nā kūlana waiwai o ke kila welu, ʻike ʻia nā mea ʻē aʻe a pau e like a like paha.


ASTM A 242


ʻIke ʻia hoʻi ʻo ka alloy A 242 mua, loaʻa iā ia ka ikaika hua o 50 kSi (340 Mpa) a me ka ikaika tensile hope loa o 70 kSi (480 Mpa) no nā ʻano ʻōwili māmā a me waena. No nā papa, hiki iā lākou ke ʻekolu hapaha ʻīniha ka mānoanoa. Eia kekahi, loaʻa iā ia ka ikaika hope loa o 67 ksi, ka ikaika o ka hua o 46 ksi, a ʻo ka mānoanoa o ka pā mai 0.75 a 1 in.

ʻO ka ikaika hope loa a me ka ikaika o nā papa i ʻōwili ʻia a me nā profiles he 63 kSi a me 42 kSi.


No kāna ʻāpana, hiki iā ʻoe ke loaʻa iā ia ma nā ʻano 1 a me 2. E like me ka inoa, e hoʻohana ʻia lākou a pau no nā noi like ʻole, ma muli o ko lākou mānoanoa. I ka hihia o ke ʻano 1, hoʻohana maʻamau ia i ke kūkulu ʻana, nā hale hale, a me nā kaʻa. ʻO ke kila Type 2, i ʻike ʻia ʻo Corten B, hoʻohana nui ʻia no nā cranes kaʻa a moku paha, a me nā lako kūlanakauhale.

ASTM A 588


Me ka ikaika tensile hope loa o 70 ksi a me ka ikaika hua o ka liʻiliʻi loa he 50 ksi, e ʻike ʻoe i kēia kila welu ma nā ʻano ʻōwili āpau. Ma ke ʻano o ka mānoanoa pā, he 4 iniha ka mānoanoa. ʻO ka ikaika tensile hope loa ma kahi o 67 kSI no nā papa o ka liʻiliʻi 4 a 5 mau iniha. ʻO ka ikaika tensile hope loa o ka liʻiliʻi loa he 63 ksi a me ka ikaika hoʻohua o ka liʻiliʻi he 42 ksi no nā pā 5 - a 8-iniha.