Ƙirƙirar Hanyar dumama

Gabaɗaya, ƙirƙira dumama wanda adadin asarar ƙonewa shine 0.5% ko ƙasa da haka yana da ƙarancin iskar oxygen, kuma dumama wanda adadin asarar kona shine 0.1% ko ƙasa da haka ana kiransa dumama mara oxidizing. Ƙananan dumama-free hadawan abu da iskar shaka iya rage karfe hadawan abu da iskar shaka da kuma decarburization, muhimmanci inganta surface ingancin da girma daidaito na forgings, da kuma rage mold lalacewa. Fasahar dumama mara ƙarancin iskar iskar shaka wata fasaha ce mai goyan baya don ƙirƙira madaidaicin ƙirƙira. Wannan fasaha har yanzu ba a gudanar da bincike mai yawa a kasar Sin ba.

 

Akwai hanyoyi da yawa don cimma ƙarancin dumama mara amfani da iskar shaka. Hanyoyin da aka saba amfani da su da kuma saurin haɓakawa sune sauri, matsakaicin kariya, da ƙarancin dumama harshen wuta.bangaren injina

 

1, saurin dumama

Dumama cikin sauri ya haɗa da saurin dumama da jujjuya saurin dumama, dumama wutar lantarki, da tuntuɓar dumama wutar lantarki a cikin tanderun wuta. Tushen ka'idar don saurin dumama shi ne lokacin da ƙarancin ƙarfe ya yi zafi a ƙimar dumama mai yuwuwar fasaha, madaidaicin matsananciyar zafin jiki, saura damuwa, da damuwa na nama da aka haifar a cikin billet ɗin ba su isa su haifar da tsagewar billet ba. Ana iya amfani da wannan hanya don ƙananan ƙananan ƙarfe na carbon ingots da blanks don ƙirƙira gabaɗaya na siffofi masu sauƙi. Tun da tsarin da ke sama yana da ƙimar dumama mai girma, lokacin dumama yana da ɗan gajeren lokaci, kuma oxide Layer da aka kafa a saman billet yana da bakin ciki, don haka manufar oxidation kadan ne.

Lokacin da ake amfani da dumama induction, ƙona ƙarfe yana kusan 0.5%. Ana iya shigar da iskar mai karewa a cikin induction dumama tanderun don cimma buƙatun babu dumama dumama. Gas mai karewa iskar gas ce mara aiki kamar nitrogen, argon, helium, ko makamantansu, da kuma rage iskar gas kamar cakuda CO da H2, wanda aka tanada musamman ta na’urar samar da iskar gas.CNC

Tun da sauri dumama muhimmanci shortness da dumama lokaci, da mataki na decarburization za a iya muhimmanci rage yayin rage hadawan abu da iskar shaka, wanda ya bambanta da m oxidizing harshen dumama, daya daga cikin mafi muhimmanci abũbuwan amfãni na m dumama.bangaren filastik

 

2, ruwa matsakaicin kariya dumama

 

Kafofin watsa labarai na kariya na ruwa sune narkakkar gilashi, narkakkar gishiri, da dai sauransu. Dumin tankin wanka na gishiri wanda aka kwatanta a sashe na farko na Babi na 2 nau'in dumama kariya ce ta ruwa.

 

Hoto na 2-24 yana nuna tanderun wanka na gilashi mai ci gaba da nau'in turawa. A cikin sashin dumama na murhu, gilashin narkakkar zafin jiki yana narkewa a cikin kasan tanderun, kuma billet ɗin yana dumama bayan an ci gaba da tura shi ta cikin ruwan gilashin. Saboda kariyar ruwan gilashin, billet ɗin ba ya da iskar oxygen yayin aikin dumama, kuma bayan an fitar da billet daga ruwan gilashin, saman yana kan saman. An haɗa shi da fim ɗin gilashin bakin ciki, yana hana oxidation na biyu na billet kuma yana shafa shi yayin ƙirƙira. Wannan hanyar tana da sauri da daidaituwa a cikin dumama, tana da kyakkyawan iskar shaka da tasirin decarburization, yana da sauƙin aiki, kuma hanya ce mai ban sha'awa mara ƙarancin iskar shaka.
3, m matsakaici kariya dumama (shafi kariya dumama)

 

Ana amfani da sutura na musamman a saman sararin samaniya. Lokacin da zafi, murfin ya narke don samar da fim mai yawa da iska. An haɗa shi da ƙarfi zuwa saman babur don keɓe sarari daga iskar iskar tanderu mai iskar oxygen don hana iskar oxygenation. Bayan an fitar da billet ɗin, rufin zai iya hana oxidation na biyu kuma yana da tasirin hana zafi, yana guje wa faɗuwar zafin saman billet da aiki azaman mai mai yayin ƙirƙira.

 

An raba suturar kariya zuwa gilashin gilashi, gilashin yumbura gilashi, gilashin ƙarfe na gilashi, murfin ƙarfe, kayan haɗin gwiwa, da makamantansu bisa ga tsarinsa. Mafi yawan amfani da shi shine murfin gilashi.

 

Gilashin rufin su ne dakatarwa na takamaiman abun da ke ciki na foda gilashin da ƙaramin adadin stabilizer, ɗaure, da ruwa. Kafin yin amfani da shi, ya kamata a tsabtace fuskar da ba ta da kyau ta hanyar yashi, da dai sauransu, don haka za a iya haɗawa da rufin rufin da blank. Ana amfani da sutura ta hanyar tsoma, shafan goga, feshin bindiga, da feshin lantarki. Ana buƙatar sutura ya zama iri ɗaya. Kaurin ya dace. Yawanci, shi ne 0.15 zuwa 0.25 mm. Idan rufin ya yi kauri sosai, yana da sauƙin kwasfa kuma yana da bakin ciki sosai don kare shi. Bayan an rufe shi, a dabi'a an bushe shi a cikin iska kuma a sanya shi a cikin tanda mai zafi. Hakanan yana yiwuwa a yi preheat ɗin billet ɗin zuwa kusan 120 ° C kafin a shafa ta yadda rigar foda ta bushe nan da nan bayan an shafa kuma ya manne da kyau a saman babur. Za'a iya yin dumama pre-forging bayan an bushe murfin.

 

Ya kamata a narkar da abin rufewa da kyau, mai yawa, da kwanciyar hankali na sinadarai don ba da kariya mai ma'ana da lubrication na murfin kariyar gilashi. Lokacin da nau'ikan rarraba nau'ikan gilashin ya bambanta, halayen jiki da na sinadarai sun bambanta. Sabili da haka, amfani ya dogara da nau'in kayan ƙarfe da aka yi amfani da shi da matakin ƙirƙira zafin jiki. Zabi abubuwan gilashin da suka dace.

 

Hanyar dumama rufin gilashin da aka yi amfani da shi sosai a kasar Sin don samar da gami da titanium, bakin karfe, da injunan jirgin sama na superalloy.