Wehewehena:
ʻO Co 21, he koʻokoʻo ʻōlohelohe i hoʻokumu ʻia i ka cobalt e hana ana i kahi kalapona haʻahaʻa, austenitic alloy, me nā waiwai paʻakikī hana maikaʻi loa, ka ikaika wela kiʻekiʻe a me ke kūpaʻa i ka hopena. Paʻa nā waihona Co 21 i ka wā o ka hoʻomehana wela, e lilo ana iā lākou i koho maikaʻi no nā mea make wela. hoʻohana ʻia ia ma nā kino a me nā noho o ka valve hoʻokele mahu a me ka wai. Hiki ke hoʻopili ʻia i nā kila weldable āpau, me nā kila kila. Ua like ia me: Stellite 21, Polystel 21.
NĀ PALAPALA NOI:
Nā kiwikā mahu. Nā ʻokiʻoki wela. Nā make hana hao. Nā plug piercing. Nā kiwikā kemika a me ka petrochemical.
Nā kikoʻī huahana:
ʻAno kemika
| Papa | Ka hoʻohuihui kemika (%) | ||||||||
| Co | Cr | W | Ni | C | Mn | Si | Mo | Fe | |
| Hui 21 | Bal | 27.3 | ≤0.5 | 2 | 0.25 | ≤0.5 | 1.5 | 5.5 | 1.5 |
NĀ ʻANO KINO:
| Papa | Ka nui o ka paʻa | Kiko Heheʻe |
| Hui 21 | 8.33g/cm3 | 1295~1435°C |
NĀ ʻANO MAʻAMAU:
| Paʻakikī | Ke kū'ē ʻana i ka abrasion | Nā Papa Waiho | Ke kū'ē ʻana i ka palaho | ʻO Machilityineab |
| HRC 27~40 | Maikaʻi loa | Nui | Maikaʻi loa | Nā Mea Hana Carbide |
NĀ NUI MAʻAMAU:
| Anawaena | Anawaena | Anawaena |
| 1/8” (3.2mm) | 5/32” (4.0mm) | 3/16” (4.8mm) |
E hoʻomaopopo he loaʻa nā nui kūikawā, a i ʻole nā koi hoʻopili ma nā noi āpau.
NĀ KIKOʻĪ:
ʻO AWS A5.21 /ASME BPVC IIC SFA 5.21 ERCoCr-E
ʻAWS A5.13 ECOCR-A:
Kobalta 6
Ua hōʻike ʻia nā electrodes ECoCr-A e kahi ʻano hypoeutectic, nona kahi pūnaewele o kahi 13% eutectic chromium carbides i hoʻolaha ʻia i loko o kahi matrix solution solid cobalt-chromium-tungsten. ʻO ka hopena he mea me ka hui pū ʻana o ke kū'ē holoʻokoʻa i ka ʻaʻahu abrasive haʻahaʻa, me ka paʻakikī e pono ai e kū'ē i kekahi kekelē o ka hopena. He maikaʻi nō hoʻi nā alloys Cobalt no ke kū'ē ʻana i ka ʻaʻahu metala-a-metala, ʻoi aku hoʻi i nā kūlana ukana kiʻekiʻe e maʻalahi i ka galling. Hāʻawi pū ka ʻike alloy kiʻekiʻe o ka matrix i ke kū'ē maikaʻi loa i ka corrosion, oxidation, a me ka paʻa ʻana o ka mahana kiʻekiʻe o ka paʻakikī wela a hiki i ka nui o 1200°F (650°C). ʻAʻole pili kēia mau alloys i ka hoʻololi allotropic a no laila ʻaʻole e nalowale ko lākou mau waiwai inā mālama ʻia ka metala kumu i ka wela.
Manaʻo ʻia ʻo Colbalt #6 no nā hihia kahi e hele pū ai ke komo ʻana me nā mahana kiʻekiʻe a me kahi e pili ana ka pala, a i ʻole nā mea ʻelua. ʻO kekahi mau hoʻohana maʻamau he mau kiwikā kahe kaʻa a me ke kahe wai, nā alakaʻi ʻoki kaulahao, nā punch wela, nā pahi ʻokiʻoki, a me nā wili extruder.
ʻAWS A5.13 ECOCR-B:
Kobalta 12
Ua like ke ʻano o nā electrodes a me nā koʻokoʻo ECoCr-B me nā waihona i hana ʻia me ka hoʻohana ʻana i nā electrodes a me nā koʻokoʻo ECoCr-A (Cobalt 6), koe wale nō kahi pakeneka kiʻekiʻe iki (ma kahi o 16%) o nā carbides. Loaʻa i ka alloy kahi paʻakikī kiʻekiʻe iki a me ka pale ʻana i ka abrasive a me ka metal-to-metal. Ua hoʻemi iki ʻia ke kūpaʻa i ka hopena a me ka corrosion. Hiki ke hana ʻia nā waihona me nā mea hana carbide.
Hoʻohana like ʻia nā electrodes ECoCr-B (Cobalt 12) me nā electrodes ECoCr-A (Cobalt 6). E pili ana ke koho ʻana i ka noi kikoʻī.
ʻO AWS A5.13 ECOCR-C:
Kobalta 1
ʻOi aku ka nui o ka pakeneka o nā carbides o ECoCr-C (ma kahi o 19%) ma mua o nā waihona i hana ʻia me ka hoʻohana ʻana iā ECoCr-A (Cobalt 6) a i ʻole ECoCr-B (Cobalt 12). ʻO ka ʻoiaʻiʻo, ʻo ke ʻano o ka hui ʻana, ua loaʻa nā carbides hypereutectic mua i loko o ka microstructure. Hāʻawi kēia ʻano i ka alloy i ke kūpaʻa ʻana i ke kapa komo me ka hōʻemi ʻana i ka hopena a me ke kūpaʻa ʻana i ka corrosion. ʻO ke kiʻekiʻe o ka paʻakikī ʻo ia hoʻi ka hiki ke hoʻemi ʻia kahi ʻano nui ma ka nānā pono ʻana i ka hoʻomehana mua, ka mahana interpass, a me nā ʻano hana postheating.
ʻOiai ke palupalu iki nei nā waihona cobalt-chromium i nā mahana kiʻekiʻe, ua manaʻo ʻia lākou he palekana i ka hoʻomehana ʻana. Hoʻohana ʻia nā electrodes ECoCr-C e kūkulu i nā mea e like me nā mea hoʻohuihui, nā rotors a i ʻole kahi i loaʻa ai ka abrasion koʻikoʻi a me ka hopena haʻahaʻa.
ʻAWS A5.13 ECOCR-E:
Kobalta 21
He ikaika a maikaʻi loa ka ductility o nā electrodes ECoCr-E i nā mahana a hiki i 1600°F (871°C). Kūpaʻa nā waihona i ka haʻalulu wela, ka oxidizing, a me ka hoʻemi ʻana i nā lewa. Ua loaʻa nā hoʻohana mua o kēia ʻano alloys i nā ʻāpana mīkini jet e like me nā lau turbine a me nā vanes.
He mea hoʻopololei paʻa ka waihona me kahi pae carbide haʻahaʻa haʻahaʻa i loko o ka microstructure. No laila, he paʻakikī loa ka mea hoʻopololei a e paʻakikī. Loaʻa i nā waihona ke kūpaʻa galling ponoʻī maikaʻi loa a kūpaʻa loa hoʻi i ka ʻino ʻana o ka cavitation.
Hoʻohana ʻia nā electrodes ECoCr-E i kahi e koʻikoʻi ai ke kū'ē ʻana i ka haʻalulu wela. Nā noi maʻamau; like me nā mea i waiho ʻia me ka hoʻohana ʻana i nā electrodes ECoCr-A (Cobalt 6); nā ʻōwili alakaʻi, nā make extrusion wela a me ka forging, nā pahi ʻoki wela, nā ʻāpana tong, ka ʻoki valve.
