420 SSʻO ka uea pīpī wela (Kila Kino) kahi mea kiʻekiʻe i hoʻolālā ʻia no nā noi pīpī arc. ʻIke ʻia no kona kūpaʻa maikaʻi loa i ka pala, ka paʻakikī kiʻekiʻe, a me ke kūpaʻa maikaʻi i ka ʻaʻahu ʻana, ʻo 420 SS kahi kila kila martensitic e hāʻawi ana i ka pale ʻili paʻa. Hoʻohana pinepine ʻia kēia uea i nā ʻoihana e like me ka petrochemical, ka hana mana, nā kaʻa, a me ke kai e hoʻonui i ke kūpaʻa a me ke ola o nā ʻāpana koʻikoʻi. He kūpono ka uea pīpī wela 420 SS no nā noi e pono ai kahi uhi paʻakikī, kūpaʻa i ka ʻaʻahu me ke kūpaʻa kūpono i ka pala.
He mea nui ka hoʻomākaukau pono ʻana i ka ʻili no ka hoʻokō ʻana i nā hopena maikaʻi loa me ka uea pīpī wela 420 SS. Pono e hoʻomaʻemaʻe pono ʻia ka ʻili e uhi ʻia e wehe i nā mea haumia e like me ka momona, ka ʻaila, ka lepo, a me nā oxides. Manaʻo ʻia ka hoʻoheheʻe ʻana i ka grit blasting me ka alumini oxide a i ʻole silicon carbide e hoʻokō i ka ʻili o 50-75 microns. Hoʻonui ka ʻili maʻemaʻe a ʻinoʻino i ka hoʻopili ʻana o ka uhi pīpī wela, e alakaʻi ana i ka hana maikaʻi a me ke ola lōʻihi.
| ʻElemene | Hoʻohuihui (%) |
|---|---|
| Kalapona (C) | 0.15 – 0.40 |
| Chromium (Cr) | 12.0 – 14.0 |
| Manganese (Mn) | 1.0 kiʻekiʻe loa |
| Silika (Si) | 1.0 kiʻekiʻe loa |
| ʻO ka phosphorus (P) | 0.04 kiʻekiʻe loa |
| Sulfur (S) | 0.03 kiʻekiʻe |
| Hao (Fe) | Kaulike |
| Waiwai | Waiwai Maʻamau |
|---|---|
| Ka nui o ka paʻa | 7.75 g/cm³ |
| Kiko Heheʻe | 1450°C |
| Paʻakikī | 50-58 HRC |
| Ka ikaika o ka pilina | 55 MPa (8000 psi) |
| Ke kū'ē ʻana i ka ʻokikene | Maikaʻi loa |
| Ka Hoʻokele Wela | 24 W/m·K |
| Pae Mānoanoa o ka Uhi ʻana | 0.1 – 2.0 mm |
| Ka porosity | < 3% |
| Ke kū'ē ʻana i ka ʻaʻahu | Kiʻekiʻe |
ʻO ka uea pīpī wela 420 SS kahi hopena maikaʻi loa no ka hoʻomaikaʻi ʻana i nā waiwai o ka ʻili o nā ʻāpana i hōʻike ʻia i ka ʻaʻahu a me ka palaho kūpono. ʻO kona paʻakikī kiʻekiʻe a me ke kūpaʻa maikaʻi o ka ʻaʻahu e kūpono ia no nā noi e pono ai kahi uhi paʻa a lōʻihi. Ma ka hoʻohana ʻana i ka uea pīpī wela 420 SS, hiki i nā ʻoihana ke hoʻomaikaʻi nui i ke ola lawelawe a me ka hilinaʻi o kā lākou lako a me nā ʻāpana.
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