Aikace-aikacen Babban Yashi Rufin Yashi akan Ƙananan Ƙarfe da Matsakaici

Abstract: Dangane da sifofin yashi na fim, wannan takarda ta gabatar da irin matsalolin da aka fuskanta a cikin yashin simintin karfen da kamfanin marubucin ya kera, ta yi nazari kan musabbabin su, ta kuma yi amfani da dabaru da matakai daban-daban na yanayi daban-daban na aikace-aikace, ta yadda za a iya samar da simintin gyaran karfen da ya dace da bukatu na tsarin yashin fim, wanda ya dace da zuba jari na simintin karfe.

Keywords: fim yashi; simintin ƙarfe; zuba jari; zuba jari

Simintin gyare-gyaren ƙarfe suna da kyawawan kaddarorin da yawa, irin su carbon karfe, ƙarancin gami da ƙarfe, ƙarfin ƙarfi, ƙarfin ƙarfi da ƙaƙƙarfan simintin ƙarfe, halayen walda; kuma karfe na musamman na iya saduwa da lalacewa, juriya mai zafi, juriya mai lalata, juriya mai ƙarancin zafi da sauran yanayin aiki na musamman. Saboda haka, simintin gyaran kafa sassa ana amfani da ko'ina a nauyi, ma'adinai, sufuri, wutar lantarki, inji, sararin samaniya da kuma sauran masana'antu da yawa. A halin yanzu, dangane da buƙatun simintin ƙarfe na simintin ƙarfe, ko matsakaici da manyan simintin gyare-gyare galibi, da kuma buƙatun samar da taro, ƙanana da matsakaicin simintin gyare-gyare ba su da yawa, amma adadin ya fi girma, kuma mallakar simintin simintin gyare-gyare, daidaici, hadaddun simintin gyare-gyare, don haka yana taka muhimmiyar rawa a fannonin masana'antu daban-daban.

A halin yanzu, a cikin samar da ƙananan sassa na simintin ƙarfe da matsakaici, hanyoyin fasaha suna da yawa sosai, kuma sun fi bambanta, kuma kowannensu yana da halayensa, kowannensu yana da nasa amfani da rashin amfani. Bisa ga babban narke batu na simintin karfe, ruwa karfe hadawan abu da iskar shaka, matalauta karfe fluidity, shrinkage, jefa karfe sassa ne yiwuwa ga undercasting, sanyi rabuwa, shrinkage da raunana, fasa da yashi da sauran simintin lahani a cikin halaye na search for mafi kyau kananan da matsakaici simintin karfe sassa ya kamata a duniya ta simintin ma'aikata da gaggawa bukatar warware fasaha key. Daga ainihin tsarin samar da simintin simintin gyare-gyare na kasar Sin, an yi amfani da tsarin samar da kayayyaki a cikin nau'ikan hanyoyi guda uku masu zuwa: yashi jika, yashi mai sarrafa kansa da guduro hanyar simintin gyaran fuska.

(1) Yashi Rigar Laka

Yashi rigar yumbu, babban iyaka shine ƙarfin yashi ba shi da yawa, sakamakon hanyar yin gyare-gyaren yana da sauƙi don yin simintin gyare-gyaren samar da wasu lahani. Irin su tarkon yashi, ramukan yashi, ramukan yashi, ramukan iska, ramukan raguwa, haɓakar yashi, fashe, kumburin akwatin, da sauransu, adadin lahani waɗanda dole ne a haɗa su don magance yawan ƙimar tsaftacewa mai yawa. Saboda haka, bisa ga halin da ake ciki a duniya, da alama cewa yumbu rigar yashi samar da karfe sassa ba yawa, tare da atomatik gyare-gyare samar line samar ne ko da kasa, sabõda haka, a halin yanzu, yumbu rigar yashi ne yafi amfani da samar da simintin gyaran kafa sassa.

(2) Yashi guduro mai maganin kansa

Tun 1973, kasar Sin ta fara gano aikace-aikace na furan guduro kai curing yashi, saboda da yin tallan kayan kawa tsari da simintin gyare-gyare na high girma daidaito da kuma surface quality (dimensional daidaito CT10 ~ 12, surface roughness Ra25 ~ 50um), core routing ne mai kyau, foundry yashi tsaftacewa ne mai sauki, tsohon bushe yashi farfadowa yana da sauki a sake amfani da, fiye da sake amfani da kudi 9. A halin yanzu, manyan simintin gyare-gyaren ƙarfe na kasar Sin don ƙarin ci gaba da aikace-aikace mai yawa. Koyaya, saboda yawan haɓakar haɓakar haɓakar zafi na resin yashi, babban zafin jiki mara kyau, sassan simintin ƙarfe suna da sauƙin samar da fasa. Tsarin ɗaure ya ƙunshi S, N da sauran abubuwa masu cutarwa, sauƙin haifar da carburization na simintin ƙarfe na ƙarfe, shigar sulfur, fashe micro fashe; fitar da yashi yana da girma, simintin gyare-gyaren yana da haɗari ga lahani na porosity ko N lalacewa ta hanyar porosity subcutaneous; hadawa yashi, yin samfuri, zubowa, yashi, tsarin tsaftacewa yana samar da S0, C0 da sauran iskar gas masu cutarwa, yana gurɓata yanayin aiki. Don haka tsarin yashi ta hanyar amfani da resin furan don samar da sassa na simintin gyare-gyare ba abu ne da ya dace ba, musamman don samar da famfo masu sirara, masu sarƙaƙƙiya, bawul, na'urorin motsa jiki, ƙanana da matsakaitan sassa na simintin ƙarfe, wanda ma ba a so.

(3) Hanyar jefa jari

Bisa ga samfurin bukatun da kuma samar da tsari na madaidaicin simintin gyaran kafa, za a iya raba kashi biyu Categories: na farko shi ne yin amfani da high quality mold abu, high matsa lamba mold, silica Sol da silicate ethyl acetate harsashi, tururi dewaxing, m yanayi ko injin narkewa da zubo tsari, wato, kasa da kasa general narka tsarin. Yana iya samar da CT4 ~ 6 matakin daidaito simintin gyaran kafa, surface roughness Ra0.8 ~ 6.3um, yafi amfani da su samar da jirgin sama da gas turbin ruwan wukake da sauran high quality zuba jari simintin gyaran kafa: ko janar bakin karfe, low gami karfe, carbon karfe da sauran zuba jari simintin gyaran kafa. Irin wannan nau'in simintin gyare-gyare yana buƙatar ƙarin matakin fasaha da farashin samarwa, a cikin Sin, gabaɗayansa kaɗan ne. Nau'i na biyu yana amfani da kayan gyare-gyare mara ƙarancin inganci, ƙarancin ƙirar ƙira, harsashi na gilashin ruwa, lalata ruwan zafi, narkar da yanayin yanayi da aiwatar da zuƙowa. Yana iya samar da simintin gyaran kafa tare da daidaito matakin CT7 ~ 9 da surface roughness Ra2.5 ~ 25μm, yafi amfani ga carbon da low gami karfe sassa da low quality bukatun. Tare da guntu samarwa sake zagayowar, low farashin albarkatun kasa da karin kayan, m zuba jari a kayan aiki, shi ne yadu amfani a cikin gida masana'antu kamar nauyi motoci, tarakta, inji, karfe kayan aiki, inji kayan aikin, famfo da bawuloli, da dai sauransu A halin yanzu, shi ne amfani da maye gurbin yashi mold simintin gyaran kafa a kasar Sin. Ita ce babbar hanyar ƙirar ƙira don maye gurbin simintin gyare-gyaren yashi a cikin samar da ƙananan daidaitattun simintin ƙarfe da hadaddun simintin ƙarfe a China. Koyaya, akwai alawus ɗin sarrafa simintin simintin gyare-gyare, amfani da makamashi da amfani da albarkatun ƙasa, tsawon lokacin samarwa, gurɓataccen muhalli mai nauyi, ƙarancin samarwa da sauran matsaloli.

Ganin samarwa na atseding na yanzu a cikin samar da nau'ikan tsarin suttura guda uku, amma daga cikin karfin akwatin yana da kyau, kuma ya gabatar da akwatin da ke tattare da shi, don samar da karamin kayan safa na safa.

Shell simintin gyare-gyare ne da Jamus a cikin 1940s, amma a cikin gida bincike a kan marigayi. Idan aka kwatanta da talakawa yashi simintin gyaran kafa harsashi simintin yana da ƙasa da zuba jari a cikin kayan aiki, maida hankali ne akan wani yanki na kananan, dace samar, high samar da yadda ya dace, simintin gyare-gyare tare da kasa yashi, kasa turbaya a samar site, m amo, kuma ta haka ne kasa gurbatawa na yanayi, simintin gyaran kafa da high surface gama, high girma daidaito, da dai sauransu, a kasar mu mota masana'antu, jefa baƙin ƙarfe sassa a kan simintin da aka yadu amfani. Domin inganta juriyar zafin yashi na fim, kasar Sin ta yi amfani da danyen yashi na musamman (kamar yashi zircon, yashi chromite da sauransu) da aka sarrafa zuwa yashi na musamman na fim don biyan bukatun samarwa. Duk da haka, zircon yashi, chromite yashi da sauran musamman raw yashi albarkatun ne karanci, tsada, dogara a kan shigo da: Haka kuma, da surface na simintin gyaran kafa karfe sassa, musamman a cikin simintin gyare-gyare na rami (core shugaban) a saman da sasanninta, fitowan na kwarara alamomi ko wrinkled fata simintin lahani, wanda tsanani shafi surface ingancin da simintin gyaran kafa, ƙuntata da aikace-aikace na shi. Dangane da yawan zafin jiki mai girma, ƙarancin ƙarancin ƙarfe da babban simintin simintin gyare-gyare na ƙananan sassa na ƙarfe da aka samar ta hanyar yashi mai rufi, mun canza resin phenolic don haɓaka juriya na zafi, haɓaka kaddarorin thermal a lokaci guda, kuma ƙara wasu kayan taimako na musamman don rage rushewar guduro, hana bazuwar zafin da yashi ke haifarwa, da haɓaka haɓakar yashi, don haɓaka haɓakar yashi. kwanciyar hankali, da kuma kula da low Gas, ta haka ɓullo da ma'adini yashi tushen musamman high-zazzabi resistant mai rufi yashi, wanda yana da kyau kwarai high-zazzabi yi da sauran m simintin aiki, na iya maye gurbin tsada zirconium yashi mai rufi yashi don samar da wani iri-iri na hadaddun kananan daidaici karfe simintin gyaran kafa, muhimmanci rage farashin inganta yawan amfanin ƙasa da kuma ingancin simintin gyaran kafa. The high-zazzabi matsa lamba ƙarfi na high-zazzabi resistant mai rufi yashi ne ya karu daga 0.1 ~ 0.2MPa zuwa fiye da 0.8MPa, da zafi-resistant lokaci ne ya karu daga 60 ~ 110s zuwa fiye da 150s, da dakin-zazzabi tensile ƙarfi ne fiye da 3.5MPa, da zafi-20 ƙarfi ne kasa da resistant. 18m1/g (duba Table 1).