Alloy T-800 Cobalt-based Alloy Material Properties 

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COBALT ALLOY T-800

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Cr: 16.5～18.5%; Ni+Fe: ≤3.0%; Mo: 27.5～31.5%; C: ≤0.5%; N: ≤0.07%; Si: ≤3.5%; P: ≤0.03%; S: ≤0.03%; Co: koena

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ʻO ka ikaika tensile σb: 1793 MPa, modulus elastic σs: 2412 MPa, paʻakikī haʻihaʻi: 115 MPa·m^1/2, paʻakikī HRC: 54～62, mānoanoa: ≥8.2g/cm3.

Nā hiʻohiʻona nui

ʻO T800 kekahi o nā mea hoʻohana maʻamau i hoʻohana ʻia e ka cobalt. ʻO kāna hiʻohiʻona nui loa ʻo ia ka coefficient friction haʻahaʻa, a he kūpaʻa maikaʻi loa kona ʻaʻahu, kūpaʻa corrosion a me ke kūpaʻa wela kiʻekiʻe.

Hoʻokumu ʻia nā ʻāpana kobalt T 800 me nā pūhui intermetallic paʻakikī (Laves) i hoʻopuehu ʻia i loko o kahi matrix eutectic palupalu a paʻa paha. Hōʻike lākou i ka ʻaʻahu maikaʻi loa a me ke kūpaʻa hopu ʻana, ke kūpaʻa corrosion kiʻekiʻe a kūpono loa i nā kūlana lubrication paʻakikī. ʻO ke kūpaʻa ʻana o nā alloy Tribaloy e hilinaʻi nui ʻia ma ka pākēneka o ka nui o ka pae Laves.

Hoʻolālā ʻia ʻo Tribaloy T-800 e pale i ka lole wela kiʻekiʻe a me ka abrasion. Ma muli o kona kiʻekiʻe chromium maʻiʻo, he maikaʻi ka oxidation a me ka corrosion kū'ē. ʻOi aku ka paʻakikī o T-800 a ʻoi aku ka maikaʻi o ka pale ʻana i ka lole ma mua o T-400.

Hōʻike ʻo T-800 i ka pale ʻana i ka corrosion maikaʻi loa i ka acetic acid (50% ka hoʻomoʻa ʻana, ka paila) a me ka phosphoric acid (85% ka hoʻopaʻa ʻana, 66°C). ʻIke ʻia ke kūpaʻa corrosion maikaʻi loa i loko o ka sulfuric acid (5% ka nānā ʻana, 66 ° C).

Nā noi

Hoʻohana nui ʻia ʻo T-800 i ka ʻoihana aerospace ma muli o kona ʻaʻahu kiʻekiʻe o ka wela a me ke kūpaʻa ʻana, ʻoi aku ka paʻakikī o nā pahu turbine mīkini mokulele. Eia kekahi, hoʻohana ʻia ia e hana a ʻaʻahu paha i nā ʻāpana like ʻole i ka lole kiʻekiʻe a me ka corrosion environment, e like me nā bearings, cams, nā apo hoʻopaʻa, nā apo piston diesel, mechanical seal, bearing seats, valve trims and pump parts.