Ke kuhikuhi nei nā ʻenekinia iā Stellite 21 no nā noho kiʻekiʻe, ka wela wela a i ʻole nā nozzles pump, ʻaʻole lākou e koho wale i kahi mea - ke koho nei lākou i ke kūpaʻa dimensional, microstructural consistency, a me ka hoʻomanawanui ʻole no ka hoʻololi ʻana o ka hui. ʻO ia ke kumu e loaʻa ai mai kahi ʻoiaʻiʻo Stellite 21 hapa hale hana mea nui ma mua o ka manawa. ʻAʻole hiki i kēlā me kēia hale kūʻai kikoʻī ke mālama i kēia mea hao cobalt-chromium-tungsten: ʻo kona ʻano paʻakikī (48-55 HRC as-cast), ʻano hana paʻakikī, a me ka noʻonoʻo i ka mōʻaukala wela ke koi ʻoi aku ma mua o nā mīkini CNC a me nā hōʻike nānā. Ke koi nei ia i ka hoʻopaʻi ʻana i ke kaʻina hana—ma ka hoʻolei ʻana, ka mālama wela, ka mīkini multi-axis, a me ka hōʻoia ʻana i ka GD&T.
No ke aha i hāʻule ʻole ai ʻo Stellite 21 i nā lima hewa-a kūleʻa i kahi e helu ai
Ua ʻike ʻelua mākou i nā mahina he 18 i hala iho nei: ua loaʻa i kahi OEM hydraulic ʻAmelika ʻAmelika ʻo Stellite 21 piston pump housings me nā microcracks ma hope o ka wili hope ʻana. Ke kumu kumu? Ua hoʻohana ka mea hoʻolako i nā blank sand-cast me ka hoʻoheheʻe ʻole ʻana i ka hopena, a laila hoʻokuke i nā meaʻai ikaika i ka wā o ka huli ʻana. ʻAʻole i ʻoki wale ka hopena - he ʻekolu pule i hoʻopau ʻia a me $220K i ka manawa haʻahaʻa. ʻAʻole "mea hana ʻia ʻo Stellite 21 e like me ke kila kila." ʻO kāna conductivity thermal he 1/3 o ka 316 stainless. Piʻi ikaika ka ʻoki ʻana me ka manaʻo ʻole. E hāʻule ana ke ola o ka mea hana ma kahi o 60% inā he 5° ke kahe o ka mea hoʻoheheʻe a i ʻole ka geometry mea hana. Hoʻomaka ka lanakila ma mua o ka lele ʻana o ka chip mua—me ka palapala hōʻoia waiwai (AMS 5387 a i ʻole ASTM F75), ka hoʻonohonoho ʻana i ka palaoa i hōʻoia ʻia, a me nā pōʻai homogenization i kākau ʻia.
ʻEhā mau mea hiki ke kūʻai ʻole ʻia o kahi hale hana ʻo Stellite 21 Part Factory
ʻAʻole ʻae wale ka hale hana ʻo Stellite 21 i nā kiʻi kiʻi. Nīnau ʻo ia iā lākou - a laila hāʻawi i nā ʻāpana hana, ʻaʻole wale i ka nānā ʻana. Eia kā mākou hōʻoia i kēlā me kēia kūkulu:
- Hōʻoiaʻiʻo ʻia i ka ʻike maka: Loaʻa i kēlā me kēia puʻu wela nā palapala wili piha—me ka maʻiʻo cobalt (≥53%), chromium (27–31%), tungsten (14–16%), a me ke kalapona (≤0.25%). ʻAʻohe mea hoʻololi i ka "papa like".
- Ka hoʻolei ʻia ʻana o ka solidification: Hoolei waiwai no na nozzles paia lahilahi; ka hoʻolei ʻana i ka centrifugal no nā pahu cylindrical. Pono nā mea ʻelua i ka preheat mold precise (1100–1200°C) a me nā helu hoʻoluʻu e pale aku i ka hoʻokaʻawale carbide.
- Hoʻohui hoʻomaʻamaʻa wela: ʻO ka hoʻoheheʻe ʻana i ka hopena ma 1175°C ±10°C no 2 mau hola, a ukali ʻia me ka hoʻoluʻu ʻana i ka ea—ʻaʻole ka hoʻoluʻu ʻana i ka umu—e hoʻopaʻa i ka matrix austenitic like ʻole ma mua o ka hana ʻana.
- Hoʻopaʻa paʻakikī ma hope o ka mīkini ʻenehana: ʻAʻole mākou e hoʻāʻo wale i kahi wahi. ʻO ka hoʻāʻo ʻana ʻo Rockwell alakaʻi ʻia e CMM ma nā ʻāpana 9 i kēlā me kēia ʻāpana e hōʻoia i ka noho ʻana o ka paʻakikī i loko o 48-52 HRC—ʻaʻohe mea ʻoi aku ma mua o 55 HRC (pilikia brittle) a i ʻole ma lalo o 46 HRC (ʻaʻahu ʻole).
Kahi e kū ai nā hale kūʻai maʻamau—ʻo ia kahi e hoʻomaka ai ka pololei
ʻO ka hapa nui o nā mea hoʻolako e mālama iā Stellite 21 ma ke ʻano he "mea hao ʻē aʻe." Akā, hiki mai nā hemahema o ka honua maoli ma ke kikowaena: ma waena o ka hoʻoheheʻe ʻana a me ka deflection machining, ma waena o ka distortion thermal a me nā callout GD&T, ma waena o ka hoʻopau ʻana i ka ʻili a me ka dinamika wai. No ka laʻana, ʻo kā mākou AMS 5387 Stellite 21 pump cylinder houses e hana i ka 3D optical scanning *ma mua o * a * ma hope o ka hoʻoluhi hoʻoluhi hoʻoluhi ʻana-no ka mea ʻo 0.008 mm ke koena koʻikoʻi hoʻololi i ka concentricity ma mua o nā palena ISO 2768-mK. Mīkini mākou i nā ʻili koʻikoʻi e hoʻopaʻa ʻia me ka hoʻopau ʻia ʻana o ke daimana (Ra ≤0.4 µm), a laila hōʻoia me ka profilometry—ʻaʻole ka nānā ʻana. A ʻae—ua paʻa mākou i kēlā me kēia pūʻulu kūʻē i ka ASTM E112 no ka nui o ka palaoa (ASTM 5 liʻiliʻi), no ka mea, ʻo ka ʻōpala nui e hoʻolalelale i ka ʻōpū ma lalo o ke kaomi cyclic.
Mai ke kiʻi ʻana i ka hoʻouna ʻana: ʻo ka mea āu e loaʻa ai
Inā makemake kāu papahana i nā ʻāpana Stellite 21—nā nozzles, nā noho valve, nā wili waena, nā plug maʻamau-pono ʻoe ma mua o nā ʻōlelo. Pono ʻoe i ka manaʻo hana mua. Hōʻailona mākou i nā pilikia ma mua o ka hoʻomaka ʻana o ka mea hana: ʻoi aku ka mānoanoa o ka pā ma lalo o 2.5 mm i ka hoʻoheheʻe kālā, nā kihi kikoʻī ma lalo o 1.5°, a i ʻole ka ʻae ʻana o GD&T ma mua o ± 0.015 mm ma nā ʻaoʻao paʻakikī. Kākoʻo kā mākou lean workflow i nā prototype holo (e like me ka liʻiliʻi o 3 mau ʻāpana) me ka hōʻike piha FAI, a laila hoʻomaʻemaʻe ʻia i 500+ mau ʻāpana/mahina me ka ʻole o ka hoʻokō ʻana. Ka manawa o waena o ka hoʻomaka a i ka wā pau? 12-16 pule no ka hoolei ana i na mea mua, me ka NDT (UT + PT). Hoʻouna ʻia nā kauoha i nā mīkini wale nō i 6-8 mau pule. Hoʻokuʻu ʻia nā ʻāpana āpau me ka hiki ke ʻike piha ʻia: helu wela, hoʻoheheʻe ʻia, ka lāʻau pōʻai wela, hōʻike CMM, a me ka palapala ʻāina paʻakikī.
ʻAʻole pili ʻo Stellite 21 i ke kumukūʻai - pili ia i ka hopena. ʻAʻole koi ʻia ka hoʻopiʻi ʻana i ka ʻaila aila a me ke kinoea waho. He hanana palekana. ʻAʻole ʻo kahi pahu winch lohi no kahi kaʻa ʻenekinia he papa hoʻonohonoho. He ʻoluʻolu i hala. Ke koho ʻana i ka pono Stellite 21 hapa hale hana ʻo ia hoʻi ke koho ʻana i nā hoa hana e mālama i ka metallurgy ma ke ʻano he ʻenekinia—ʻaʻole kūʻai. ʻO wai ka mea i hoʻomaopopo ʻaʻole i ana ʻia ka pololei i nā microns wale nō, akā i ka hana hou ʻana ma waena o nā tausani o nā pōʻai kaomi. ʻAʻole ia he ʻōlelo hoʻohiki. ʻO ia ke kumu.
