A cikin manyanƙirƙira, Lokacin da ingancin kayan da aka yi ba su da kyau ko kuma aikin ƙirƙira ba a daidai lokacin ba, ƙirƙira fashe yana da sauƙin faruwa.
Mai zuwa yana gabatar da lokuta da yawa na ƙirƙira ƙirƙira ta hanyar rashin kyawun abu.
(1)Ƙirƙiratsagawar da ke haifar da lahani

Yawancin lahani na ingot na iya haifar da tsagewa yayin ƙirƙira, kamar yadda aka nuna a cikin Hoto, wanda shine tsakiyar ƙirƙirar sandar sandar 2Cr13.
Wannan saboda kewayon zafin jiki na crystallization yana da kunkuntar kuma madaidaicin raguwar layin yana da girma lokacin da ingot na 6T ya ƙarfafa.
Saboda rashin isassun magudanar ruwa da raguwa, babban bambancin zafin jiki tsakanin ciki da waje, babban damuwa mai ƙarfi na axial, dendrite ya fashe, yana samar da tsagewar inter-axial a cikin ingot, wanda aka ƙara fadada yayin ƙirƙira don zama tsagewa a cikin ƙirƙira igiya.

Ana iya kawar da lahani ta:
(1) Don inganta tsabtar narkakkar karfe;
(2) Ingot sanyaya a hankali, rage zafin zafi;
(3) Yi amfani da wakili mai kyau na dumama da murfin rufewa, ƙara ƙarfin ciko shrinkage;
(4)Yi amfani da tsarin ƙirƙira na tsakiya.

(2)Ƙirƙirafashe-fashe sakamakon hazo na datti mai cutarwa a cikin ƙarfe tare da iyakokin hatsi.

Sulfur a cikin karfe galibi ana hakowa tare da iyakar hatsi a cikin nau'in FeS, wanda ma'anar narkewar ita ce kawai 982 ℃. A cikin ƙirƙira zafin jiki na 1200 ℃, FES a kan iyakar hatsi za su narke da kewaye da hatsi a cikin nau'i na fim na ruwa, wanda zai lalata haɗin tsakanin hatsi kuma ya haifar da rashin ƙarfi na thermal, kuma fashewar zai faru bayan ƙirƙira kaɗan.

Lokacin da jan karfe dauke da karfe yana mai tsanani a cikin yanayin peroxidation a 1100 ~ 1200 ℃, saboda zaɓin oxidation, wuraren da ke da arzikin jan ƙarfe za su kasance a saman Layer. Lokacin da solubility na jan karfe a austenite ya wuce na jan karfe, ana rarraba jan karfe a cikin nau'in fim na ruwa a iyakar hatsi, yana haifar da brittleness na jan karfe kuma ba za a iya ƙirƙira ba.
Idan akwai tin da antimony a cikin karfe, za a rage solubility na jan ƙarfe a cikin austenite da gaske, kuma za a ƙara haɓaka halayen haɓaka.
Saboda yawan abin da ke cikin tagulla, saman injunan ƙarfe na ƙarfe yana zaɓan oxidized a lokacin ƙirƙirar dumama, ta yadda jan ƙarfe yana haɓaka tare da iyakar hatsi, kuma faɗuwar ƙirƙira yana samuwa ta hanyar lalatawa da faɗaɗa tare da iyakokin hatsi mai wadatar tagulla.

(3)Kirkirar fasalalacewa ta hanyar nau'i mai ban sha'awa (fashi na biyu)

Abubuwan injina na kashi na biyu a cikin ƙarfe galibi suna da bambanci sosai da na matrix na ƙarfe, don haka ƙarin damuwa zai haifar da tsarin filastik gabaɗaya don raguwa lokacin da nakasawa ke gudana. Da zarar danniya na gida ya wuce ƙarfin ɗauri tsakanin lokaci mai ban sha'awa da matrix, rabuwa zai faru kuma za a kafa ramukan.
Alal misali, oxides, nitrides, carbides, borides, sulfides, silicates da sauransu a cikin karfe.
Bari mu ce waɗannan matakan suna da yawa.
Rarraba sarkar, musamman tare da iyakar hatsi inda rashin ƙarfi mai ƙarfi ya wanzu, ƙirƙira yawan zafin jiki zai tsage.
Siffar ilimin halittar jiki na ƙirƙira ƙirƙira lalacewa ta hanyar hazo mai kyau na AlN tare da iyakar hatsi na 20SiMn karfe 87t ingots an oxidized kuma an gabatar da shi azaman lu'ulu'u na columnar polyhedral.
Binciken ƙananan ƙananan ya nuna cewa ƙirƙira ƙirƙira yana da alaƙa da babban adadin hazo mai kyau na AlN tare da iyakar hatsi na farko.

The countermatakan zuwahana ƙirƙira fatattakaSakamakon hazo na aluminum nitride tare da crystal sune kamar haka:
1. Ƙayyade adadin aluminum da aka ƙara zuwa karfe, cire nitrogen daga karfe ko hana hazo AlN ta ƙara titanium;
2. Dauki zafi bayarwa ingot da supercooled lokaci canji tsarin jiyya;
3. Ƙara zafi ciyar da zafin jiki (> 900 ℃) da kuma kai tsaye zafi ƙirƙira;
4. Kafin ƙirƙira, isa homogenization annealing ne da za'ayi don yin hatsi iyaka hazo lokaci yadawa.