Chitsulo chosungunuka chimapezedwa pothira chitsulo chosungunula ndi mankhwala enaake m'mipanda yoyera ndiyeno nkumathiridwa ndi annealing. Graphite mu chitsulo chosungunula chosasunthika chimakhala choyenda komanso nthawi zina pang'ono ma pellets. Choyimira chachikulu chachitsulo chosungunuka ndi ferrite ndi pearlite. Malinga ndi mitundu yosiyanasiyana yochizira kutentha, chitsulo chosungunula chitha kugawidwa kukhala chitsulo chosungunuka cha graphitized annealing malleable cast and decarburization annealing malleable cast iron.
Kutentha kwabwino kwa chitsulo chosungunuka kumakhala pafupi ndi chitsulo cha nodular ndi matrix omwewo. Pansi pa kutentha kochepa, kulimba kwachitsulo ndi kudula kwachitsulo chosungunuka kumakhala bwinoko kusiyana ndi chitsulo cha nodular cast. Malleable cast iron castings amagwiritsidwa ntchito kwambiri pomanga, magalimoto, mathirakitala, makina aulimi ndi zina. Malleable iron castings nthawi zambiri amagwiritsidwa ntchito poponya malumikizo a chitoliro, zomangira zomangira, zigongono, titeyi, ma valve, ma wrenches, zipolopolo za jack, zogwiriziza masamba, mabulaketi, ma axle housings, ndodo zolumikizira injini, zida za rocker, ndi zina zotero. Chithandizo cha kutentha kwa malleable cast chitsulo makamaka chimaphatikizapo graphitization annealing ndi decarburization annealing.
Katundu wa Malleable Cast Iron
1. Katundu Wamakina
Chiŵerengero cha mphamvu ya zokolola ku mphamvu yamakokedwe ya chitsulo chosungunula ndi pafupi ndi chitsulo chosungunuka cha mpira, koma ndi pafupifupi 60% ~ 80% kuposa cha carbon steel. Chitsulo chosungunuka ndi choyenera kugwira ntchito potentha kwambiri kuposa chitsulo chosungunuka.
2. Njira Magwiridwe
Chifukwa zomwe zili mu carbon ndi silicon za chitsulo chosungunula ndizochepa, digiri ya eutectoid ndi yaying'ono, ndipo billet yoponyera imayang'ana molingana ndi dongosolo la metastable, kuponyedwa kwachitsulo chosungunuka kumakhala kosauka, ndipo kuponyera kumakhala kosavuta kuponya zolakwika. monga kulephera kuthira, kufinya zibowo, shrinkage porosity, ndi ming'alu. Pofuna kupewa zolakwika izi, njira ziyenera kuchitidwa monga kuwonjezera kutentha kwa kuthira, othamanga njira, kuonjezera mitu yothamanga kwambiri, kuwonjezera ma risers, kuyika chitsulo chozizira, ndikuwongolera kuwonongeka kwa mchenga wowumba ndi mchenga wapakati popanga njira yoponyera.
3. Machining Magwiridwe
Ferritic malleable cast iron imakhala ndi kuuma pang'ono, ndipo ntchito yake yodulira ndi yabwino kuposa chitsulo chotuwira komanso chitsulo chodula mwaulere. Chifukwa chake, chitsulo chosungunula chopangidwa ndi ferritic ndi chinthu chokhala ndi ntchito yabwino kwambiri pakati pa ma aloyi achitsulo-carbon. Pearlitic malleable cast iron imakhala yolimba kwambiri komanso yodula pang'ono.
4. Kuwotcherera Magwiridwe
Zitsulo zosungunuka zamtima wakuda ndi chitsulo chosungunula cha pearlite nthawi zambiri sizoyenera kuwotcherera, chifukwa pakamwa zoyera zimapangidwa m'malo owotcherera. Mkamwa woyera udzang'ambika pansi pa kuwotcherera kupsyinjika. Kwa zoponyera zomwe zimanyamula katundu wocheperako, wopindika, ndi kukhudza, kapena zomwe zimagwiritsidwa ntchito makamaka kunyamula ndi torque yaying'ono, ngati kuwotcherera pakufunika, zoponyera zimayenera kutenthedwa musanawotchedwe, ndikuteteza kutentha ndi kuziziritsa pang'onopang'ono ndikofunikira mutatha kuwotcherera. Ngati kuli kofunikira, kubwezeretsanso kumafunika kuchotsa simenti ndi kupsinjika mozungulira powotcherera. Komabe, kuponyera koyera koyera kumakhala ndi ntchito yabwino yowotcherera, motero kumatchedwanso chitsulo chosungunuka chosungunuka.
5. Abrasion Resistance
Kukana kuvala kwa chitsulo chosungunuka cha pearlite ndikwabwino kuposa chitsulo wamba wamba. Chifukwa chake, chitsulo chosungunula cha pearlite ndichoyenera kuponyera mbali zomwe zili ndi zofunika zina zamphamvu komanso kukana kuvala. Kupyolera mu kuzimitsa kutentha kutentha, kuuma kwa malleable iron castings kumatha kufika 60 HRC, ndipo kukana kwake kuvala kungakhale kofanana ndi chitsulo chochepa cha alloy. Komabe, chitsulo chosungunula chopangidwa ndi ferritic sichoyenera kuyika mbali zogwira ntchito.
6. Kukana Kutentha
Kukana kutentha kwa chitsulo chosungunuka cha ferritic ndi chitsulo chosungunula cha pearlite ndikwabwino kuposa chitsulo chonyezimira ndi chitsulo cha carbon, ndipo kukana kutentha kwa chitsulo chosungunula cha ferritic ndikwabwino kuposa chitsulo chosungunula cha pearlite.
7. Mayamwidwe Odabwitsa
Chifukwa cha mawonekedwe a graphite, chitsulo chosungunuka chimakhala ndi mayamwidwe otsika kwambiri kuposa chitsulo chotuwa komanso kuposa chitsulo choponyedwa ndi chitsulo chonyezimira. Pansi pa kupsinjika pang'ono, magwiridwe antchito a chitsulo chosungunula cha ferritic ndi ofanana ndi chitsulo chosungunuka, koma pansi pa kupsinjika kwakukulu, magwiridwe antchito a ferritic malleable cast iron amakhala pafupifupi kuwirikiza katatu kuposa chitsulo choponyedwa ndi 2 nthawi ya ductile cast iron.
Nthawi yotumiza: Mar-04-2021