Hāʻawi nā bolts Monel i ka ikaika like ʻole a me ka pale ʻana i ka corrosion kahi e hāʻule ʻole ai nā mea hoʻopaʻa maʻamau-ʻo nā pamu wai kai, nā kīwaha ʻawaʻawa, nā manifold hydraulic waho. Ua hana mākou ma luna o 12,000 Monel K-500 a me Monel 400 bolts no nā hale pahū kiʻekiʻe mai ka makahiki 2019. Ua ola kēlā me kēia mea i ka hoʻāʻo paʻakai ma mua o 3,000 mau hola me ka ʻole o ka lua. ʻAʻole ia he hana theoretical. ʻO ia ka hilinaʻi i hōʻoia ʻia ma lalo o nā ukana cyclic maoli, nā haʻalulu wela, a me nā lewa chloride.
ʻAʻole "stainless-steel-plus" wale nā bolts monel. He mau nickel-copper alloy lākou—ma ka maʻamau 67% nickel, 23% keleawe, me nā mea hoʻohui liʻiliʻi akā koʻikoʻi o ka alumini a me ka titanium i K-500. Hoʻokumu kēia haku mele i nā microstructure paʻakikī paʻakikī e kūʻē i ke koʻikoʻi-corrosion pohā ʻoi aku ka maikaʻi ma mua o 316 stainless a i ʻole duplex steels. I loko o kahi hui valve subsea subsea, hoʻololi mai Inconel 625 bolts i Monel K-500 i hoʻemi ʻia ke alapine hoʻololi bolt e 70% ma luna o 18 mahina. No ke aha mai? No ka mea, mālama ʻo Monel i ka ikaika o ka hua ma luna o 1,000 MPa ʻoiai e pale ana i ka corrosion crevice ma pH 2-12 a me nā mahana a hiki i 480°C.
Akā koi ʻo Monel bolts i ka mahalo - ʻaʻole wale ka mahalo. He kiʻekiʻe loa kā lākou hana-paʻakikī. Hiki i ka paʻi kuhi hewa ke ʻoki ʻia i ka hakahaka. Ua ʻike mākou i nā mea kūʻai aku e nalowale ana i nā pūʻulu holoʻokoʻa no ka mea ua hoʻohana lākou i nā paʻi HSS maʻamau ma mua o nā mea hana carbide me ka hāʻawi ʻana i ka mea hoʻoheheʻe paʻa. ʻAʻole maikaʻi ʻo Monel i ka wela. Me ka ʻole o ka mālama ʻana i ka wela i ka wā e mīkini ai, hoʻopalupalu ka annealing kūloko i ke aʻa o ke kaula—e ʻoki ana i ke ola luhi i ka hapalua. ʻO ia ke kumu e hoʻomaʻamaʻa mua ai mākou i nā hakahaka i 120°C ma mua o ka hoʻopaʻa ʻana i ka wili, hoʻohana i nā wili hoʻopau cryogenic-cooled, a hōʻoia i ka paʻakikī ma nā ʻāpana radial ʻekolu ma kēlā me kēia pā. ʻAʻohe ala pōkole e ola i kēia huila.
- ʻOi aku ka mea nui ma mua o ka helu papa. Ua kūpono ʻo Monel 400 i ka ʻike ʻana i ka wai kai kūmau; Hoʻohui ʻo Monel K-500 i ka hoʻopaʻapaʻa makahiki no ka hoʻopaʻa ʻana i ka torque hoʻoikaika i nā ʻaʻa pāpaʻi.
- ʻAʻole koho ʻia ka geometry thread-he hana. ʻOi aku ka maikaʻi o nā loina Unified National Fine (UNF) i nā pitch koʻikoʻi ma nā wahi haʻalulu kiʻekiʻe ma o ka puʻunaue like ʻana i ka ukana clamp.
- Hoʻopili pololei ka hoʻopau ʻana i ka ʻili i ka hoʻomaka ʻana o ka corrosion. ʻO Ra ≤ 0.4 μm kaohi i nā micro-crevices kahi e hoʻopili ai nā chlorides; ʻO ka electropolishing e hōʻemi ana i nā hemahema passive-layer e 92% ma mua o ka polishing mechanical wale nō.
Hiki i kekahi ke hoʻopaʻapaʻa i ke kumu kūʻai nui loa o nā bolts Monel-a hiki i ka 4x ʻoi aku ma mua o A2-70 stainless. Eia naʻe, he moʻolelo ʻokoʻa ka nui o ke kumukūʻai o ka ʻona. Hoʻokahi mea hoʻohana o ke Kai ʻĀkau i hahai i 14 hydraulic manifold ami ma luna o 24 mahina. Me nā bolts stainless, ua hana lākou i 19 mau pani pani ʻole ʻia no ka hoʻololi ʻana i ka bolt a me ka resealing gasket. Me nā bolts Monel K-500, holo lākou i 22 mahina me ka ʻole o ka leak hui. Ua hāʻule nā kumukūʻai hōʻoia no ka hana, ka manawa haʻahaʻa, a me ka palekana e $217,000 i kēlā me kēia makahiki. ʻAʻole kahi hiʻohiʻona ka pale ʻana i ka corrosion. Hoʻopanee ʻia ka mālama ʻana-a hoʻopaneʻe i ka pilikia.
QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD. nā mīkini Monel bolts me ka ISO 9001-certified CNC kikowaena me ka manawa maoli ka uku wela. Hoʻokumu mākou i nā billet i hōʻoia ʻia ʻo AMS 4675, hōʻoia i ka hoʻoheheʻe ʻana o ka palaoa ma mua o ka hana ʻana, a hana i ka nānā ultrasonic ma kēlā me kēia pūʻulu e ʻike i nā hoʻokomo ʻana i lalo. Loaʻa i kā mākou kaʻina hana ka hoʻopili ʻana i ka hopena ma 980°C ± 5°C, hoʻopau wikiwiki i ka wai, a laila ʻelemakule ma 650°C no 16 mau hola-ma ka ASTM B564. Lawe ʻia kēlā me kēia bolt i ka traceability piha: helu wela, hōʻike hōʻike tensile, intergranular corrosion test (ASTM G28A), a me ka ʻikepili CMM dimensional i mālama ʻia no 10 mau makahiki. Ke makemake ʻoe i nā bolts Monel e paʻa ana i ka torque ma hope o 50,000 mau kaʻina kaomi ma 95 ° C brine-ʻaʻole mākou e kuhi. Ana mākou, hōʻoia, a hōʻoiaʻiʻo.
Ke nānā aku nei i mua, ke ulu nei nā bolts Monel ma mua o ka hoʻopaʻa paʻa. Ke hoʻokomo nei mākou i nā ʻano kānana i loko o nā moʻo kuʻuna Monel 400 bolt shanks no ka nānā mua ʻana i ka manawa maoli i nā kumu pahū koʻikoʻi. Hoʻohui nā manaʻo o ka hanauna hou i nā micro-channels no ka hāʻawi ʻana i ka lubricant inline i ka wā o ka hana-e hoʻolōʻihi i nā manawa lawelawe ma nā noi ʻaila ʻaila mamao. ʻAʻole pili ka wā e hiki mai ana i nā bolts Monel ikaika. E pili ana i nā mea akamai-i hoʻolālā ʻia me ke kumu, hoʻopaʻa ʻia me ka ʻikepili, a kūkulu ʻia kahi koho ʻole ʻole. Inā koi kāu palapala noi i ka ʻae ʻole i ka pono, kemika, a i ʻole ke kūlike, nā kī monel ʻaʻole kāu koho maikaʻi loa. ʻO lākou wale nō kāu koho.
