Takaitaccen tsarin aikin walda bakin karfe

Na biyu: tsarin walda

Zaɓin kayan walda na bakin karfe ya kamata su bi ka'idar "homogeneity".

1. Ferritic bakin karfe Idan tsarin walda yana mai tsanani a 430-480 ° C na dogon lokaci kuma yana sanyaya sannu a hankali, yana da sauƙi don samar da 475 ° C gaggautsa, kuma ƙazanta za su taka rawar gani. Tsarin walda yana ba da shawarar ƙarancin halin yanzu, walƙiya mai sauri, babu oscillation, da ƙarancin sarrafa zafin jiki yayin waldawar multilayer. Don walda kayan aiki masu kauri, dole ne a dunƙule kabu ɗin walda don rage damuwa.

2. Martensitic bakin karfe zafi-shafi yankin embrittlement da waldi sanyi fasa ake bukata don kauce wa kamar yadda zai yiwu a lokacin waldi, kullum dauki daidai preheating kafin waldi (150-300 °C) da post-welding zafi magani (700-750 °). C) matakan, amfani da manyan makamashin layi, idan ya cancanta, zaka iya zaɓar kayan walda na austenitic.

3. Austenitic bakin karfe Abubuwan da ke da tasiri na fashewa mai zafi da lalata intergranular sune mahimman la'akari don walda irin wannan bakin karfe, la'akari da halayensa na jiki, ya kamata a dauki karamin makamashi mai linzami don waldawa, saurin sanyaya, da ƙananan zafin jiki na interlayer. yakamata a sarrafa shi lokacin waldawar multilayer. Ƙoƙari don ƙunsar adadin ferrite daidai lokacin walda don hana faruwar fashewar zafi. A cikin masana'antar petrochemical kamar su masu samar da iskar hydrogenation da sauran takamaiman samfuran, adadin ferrites (FN) na weld an tsara shi a sarari, gabaɗaya ana buƙata 3-10.

4. Austria-baƙin ƙarfe duplex bakin karfe yana da low crack hali idan aka kwatanta da austenitic karfe; Idan aka kwatanta da karfen ferritic, embrittlement bayan walda yana da ƙasa, don haka yana da kyakkyawan walƙiya, ba preheating ko bayan dumama, kuma babu fasa walda. Koyaya, lokacin dumama a yanayin zafi mai zafi, akwai yanayin haɓakar hatsi, kuma yakamata a ɗauki ƙaramin kuzarin layi lokacin walda.

5. Hazo-taurare bakin karfe Saboda high taurin, matalauta taurin da kuma roba irin wannan irin karfe, da kuma babban waldi saura danniya, yana da sauki don samar da fasa. Ana ba da shawarar tsarin walda mai kama da bakin karfe na martensitic, amma ana buƙatar ƙara yawan zafin jiki na preheating.

Lura:Ma'auni na AWSA5.9 don Bakin Karfe Na gani da Filler Wayoyi da YB/T5092 Standard for Bakin Karfe don Welding sun nuna cewa nazarin sinadarai na narkar da samfuran narkar da narkar da wayoyi da aka haɗa ko manne ko filler waya ita ce kawai gwajin da ake buƙata don rarrabuwar waɗannan samfuran. siffofin. Wato, kayan aikin injiniya da sauran gwaje-gwaje, bisa ga bukatun abokin ciniki.
Bakin ƙarfe na hannu na lantarki jerin GES, harafin B na ƙarshe a cikin sunan samfurin yana nuna alamar shuɗi, R yana nuna jajayen gashi, kamar GES-308R yana wakiltar jan gashi GES-308, GES-312B yana wakiltar fata mai launin shuɗi GES-312 .