Aloyi yolimba ndi aloyi wopangidwa makamaka ndi imodzi kapena angapo refractory carbide (monga tungsten carbide, titanium carbide, etc.) mu mawonekedwe ufa, ndi zitsulo ufa (monga cobalt, faifi tambala) kutumikira monga binder.Amapangidwa kudzera mu njira ya ufa wa zitsulo.Aloyi yolimba imagwiritsidwa ntchito makamaka popanga zida zodula kwambiri komanso zida zodulira zida zolimba komanso zolimba.Amagwiritsidwanso ntchito popanga zida zoziziritsa kukhosi, ma geji olondola, ndi zida zosavala zomwe sizimakhudzidwa ndi kugwedezeka komanso kugwedezeka.
▌ Makhalidwe a Hard Alloy
(1)Kuuma kwakukulu, kukana kuvala, ndi kuuma kofiira.
Aloyi yolimba imawonetsa kuuma kwa 86-93 HRA kutentha kwapakati, komwe kuli kofanana ndi 69-81 HRC.Imakhala ndi kuuma kwakukulu pa kutentha kwa 900-1000 ° C ndipo imakhala ndi kukana kwamphamvu kwambiri.Poyerekeza ndi chitsulo chothamanga kwambiri chachitsulo, aloyi yolimba imathandizira kuthamanga komwe kuli 4-7 nthawi zambiri ndipo imakhala ndi moyo wautali nthawi 5-80.Itha kudula zida zolimba zolimba mpaka 50HRC.
(2)Mkulu mphamvu ndi mkulu zotanuka modulus.
Aloyi yolimba imakhala ndi mphamvu yopondereza kwambiri mpaka 6000 MPa ndi zotanuka modulus kuyambira (4-7) × 10 ^ 5 MPa, zonse zapamwamba kuposa zachitsulo chothamanga kwambiri.Komabe, mphamvu zake zosinthika ndizochepa, nthawi zambiri zimayambira 1000-3000 MPa.
(3)Kukana bwino kwa dzimbiri komanso kukana kwa oxidation.
Ma Hard alloy nthawi zambiri amawonetsa kukana bwino kwa dzimbiri mumlengalenga, ma acid, ma alkalis, ndipo sakonda kutulutsa okosijeni.
(4)Low coefficient of linear extensions.
Aloyi yolimba imasunga mawonekedwe okhazikika ndi miyeso panthawi yogwira ntchito chifukwa cha kuchepa kwake kwa kukula kwa mzere.
(5)Zopangidwa ndi mawonekedwe safuna makina owonjezera kapena kugayanso.
Chifukwa cha kuuma kwake komanso kulimba kwake, aloyi yolimba sapitilira kudula kapena kugaya pambuyo popanga zitsulo za ufa ndi sintering.Ngati pakufunika kukonzanso kwina, njira monga makina otulutsa magetsi, kudula waya, kugaya ma electrolytic, kapena kugaya mwapadera ndi mawilo opukutira amagwiritsidwa ntchito.Nthawi zambiri, zinthu zolimba za alloy za miyeso yokhazikika zimamangidwa, kumangidwa, kapena kumangirizidwa pamakina pazida kapena maziko a nkhungu kuti agwiritse ntchito.
▌ Mitundu Yodziwika ya Hard Alloy
Mitundu yodziwika bwino ya aloyi yolimba imagawidwa m'magulu atatu kutengera kapangidwe kake ndi magwiridwe antchito: tungsten-cobalt, tungsten-titanium-cobalt, ndi ma aloyi a tungsten-titanium-tantalum (niobium).Zomwe zimagwiritsidwa ntchito kwambiri popanga ndi tungsten-cobalt ndi tungsten-titanium-cobalt hard alloys.
(1)Tungsten-Cobalt Hard Aloyi:
Zigawo zazikuluzikulu ndi tungsten carbide (WC) ndi cobalt.Gululo limatanthauzidwa ndi code "YG", kutsatiridwa ndi kuchuluka kwa cobalt.Mwachitsanzo, YG6 imasonyeza tungsten-cobalt hard alloy yokhala ndi 6% cobalt content ndi 94% tungsten carbide.
(2)Tungsten-Titanium-Cobalt Hard Aloyi:
Zigawo zazikuluzikulu ndi tungsten carbide (WC), titanium carbide (TiC), ndi cobalt.Gululo limatanthauzidwa ndi code "YT", kutsatiridwa ndi kuchuluka kwa titanium carbide.Mwachitsanzo, YT15 imasonyeza tungsten-titanium-cobalt hard alloy yokhala ndi 15% titanium carbide content.
(3)Aloyi Yolimba ya Tungsten-Titanium-Tantalum (Niobium):
Mtundu woterewu umadziwikanso kuti universal hard alloy kapena versatile hard alloy.Zigawo zazikuluzikulu ndi tungsten carbide (WC), titanium carbide (TiC), tantalum carbide (TaC), kapena niobium carbide (NbC), ndi cobalt.Magirediwo amasonyezedwa ndi code "YW" (zoyamba za "Ying" ndi "Wan," kutanthauza kulimba ndi chilengedwe chonse m'Chitchaina), ndikutsatiridwa ndi nambala.
▌ Kugwiritsa ntchito kwa Hard Alloy
(1)Zida Zodulira:
Aloyi yolimba imagwiritsidwa ntchito kwambiri popanga zida zodulira, kuphatikiza zida zokhotakhota, zodulira mphero, masamba a planer, zobowolera, etc. Tungsten-cobalt hard alloys ndi oyenera kupangira chitsulo chachifupi chazitsulo zachitsulo ndi zopanda chitsulo, monga chitsulo choponyedwa. , mkuwa, ndi matabwa ophatikizika.Ma aloyi olimba a Tungsten-titaniyamu-cobalt ndi oyenera kupanga zitsulo zazitali zachitsulo ndi zitsulo zina zachitsulo.Pakati pa ma alloys, omwe ali ndi cobalt apamwamba ndi oyenera kupanga makina ovuta, pomwe omwe ali ndi cobalt otsika ndi oyenera kumaliza.Ma aloyi olimba a Universal amakhala ndi moyo wautali wa zida akamakonza zinthu zovuta kudula ngati chitsulo chosapanga dzimbiri.
(2)Zida za Mold:
Aloyi yolimba imagwiritsidwa ntchito ngati zida zojambulira ozizira kufa, kupondaponda kozizira kumafa, kuzizira kozizira kumafa, ndipo mutu wozizira umafa.
Zida zozizira zolimba za alloy zimatha kuvala chifukwa champhamvu kapena kukhudzidwa kwamphamvu.Zofunikira zazikulu zomwe zimafunikira ndikulimba kwamphamvu, kulimba kwa fracture, mphamvu ya kutopa, mphamvu yopindika, komanso kukana kuvala bwino.Nthawi zambiri, ma aloyi apakati mpaka apamwamba a cobalt ndi ma aloyi apakati mpaka osalala amasankhidwa.Magiredi wamba akuphatikizapo YG15C.
Nthawi zambiri, pali kusinthanitsa pakati pa kukana kuvala ndi kulimba kwa zida zolimba za alloy.Kuchepetsa kukana kwa kuvala kumabweretsa kuchepa kwamphamvu, pomwe kukulitsa kulimba kungayambitse kuchepa.
Ngati mtundu wosankhidwa ndi wosavuta kutulutsa kusweka koyambirira ndi kuwonongeka komwe kumagwiritsidwa ntchito, ndikofunikira kusankha mtundu wokhala ndi kulimba kwambiri;Ngati chizindikiro chosankhidwa ndi chosavuta kutulutsa kuvala koyambirira ndi kuwonongeka kogwiritsidwa ntchito, ndi koyenera kusankha chizindikiro chokhala ndi kuuma kwapamwamba komanso kukana kuvala bwino.Maphunziro otsatirawa: YG15C, YG18C, YG20C, YL60, YG22C, YG25C kuchokera kumanzere kupita kumanja, kuuma kumachepetsedwa, kukana kuvala kumachepetsedwa, kulimba kumatheka;M'malo mwake, zosiyana ndi zoona.
(3) Zida zoyezera ndi ziwalo zosagwira ntchito
Tungsten carbide imagwiritsidwa ntchito popanga ma abrasive pamwamba ndi zida zoyezera, zotengera zolondola zamakina opera, maupangiri ndi mipiringidzo yamakina opukutira opanda pakati, ndi magawo osamva kuvala monga malo opangira lathe.
Nthawi yotumiza: Aug-02-2023
