Kodi weld crack ndi chiyani?Ndilo vuto lalikulu kwambiri mu weldments.Pansi pa olowa zochita kuwotcherera kupsyinjika ndi zinthu zina brittleness, kugwirizana mphamvu ya maatomu zitsulo m'dera la welded olowa awonongedwa ndipo mawonekedwe atsopano aumbike.Paukadaulo wowotcherera, tiyenera kupewa kuwotcherera ming'alu.
Kutentha kwa ming'alu yowotcherera:
Kuphulika kotentha kumapangidwa pansi pa kutentha kwakukulu, kuchokera ku kutentha kolimba mpaka kutentha pamwamba pa A3, choncho amatchedwa ming'alu yotentha, yomwe imatchedwanso kutentha kwakukulu.Kodi mungapewe bwanji ming'alu yotentha?Monga mbadwo wa ming'alu yotentha umagwirizana ndi zovuta, njira zopewera ziyeneranso kuyambira pazigawo ziwiri za kusankha zinthu ndi kuwotcherera.
Kuzizira kwa ming'alu yowotcherera:
Kuzizira ming'alu kwaiye panthawi kapena pambuyo kuwotcherera, pa kutentha m'munsi, kuzungulira martensite kusintha kutentha (ie Ms mfundo) wa chitsulo, kapena pa kutentha osiyanasiyana m'munsimu 300 ~ 200 ℃ (kapena T ＜ 0.5Tm, Tm ndi kusungunuka mfundo kutentha kuwonetsedwa mu kutentha kwathunthu), kotero iwo amatchedwa ozizira ming'alu.
Yatsaninso ming'alu yowotcherera:
Kutenthetsanso ming'alu kumatanthawuza zolumikizira zowotcherera za zitsulo zotsika kwambiri za aloyi ndi zitsulo zosagwira kutentha zomwe zimakhala ndi vanadium, chromium, molybdenum, boron ndi zinthu zina za alloy.Panthawi yotenthetsera (monga kutsekereza kupsinjika, kuwotcherera kwamitundu yambiri komanso kutenthetsa kwambiri), ming'alu yomwe imachitika m'dera lanjere lomwe limakhudzidwa ndi kutentha ndikuphwanyira malire ambewu ya austenite yoyambirira imatchedwanso kupsinjika. ming'alu yopumula (kuphulika kwa SR).
Pali zifukwa zambiri zowotcherera ming'alu, koma ziribe kanthu chifukwa chake, malinga ngati njira zopewera zili bwino, ngozi za ming'alu panthawi yowotcherera zimatha kuchepetsedwa kwambiri.
Nthawi yotumiza: Sep-20-2022