Ka boholoforging, ha boleng ba lisebelisoa tse tala bo fokola kapa mokhoa oa ho forging o se ka nako e nepahetseng, hangata ho bonolo ho etsa mapetsong a forging.
Se latelang se hlahisa linyeoe tse 'maloa tsa ho qhekella crack e bakoang ke thepa e fokolang.
(1)Ho qapamapatso a bakoang ke bofokodi ba engot

Boholo ba bofokoli ba ingot bo ka 'na ba baka ho phunyeha nakong ea ho qhekella, joalokaha ho bontšitsoe Setšoantšong, e leng sekhahla se bohareng sa 2Cr13 spindle forging.
Lebaka ke hobane mocheso oa kristale o moqotetsane 'me moeli oa shrinkage o moholo ha ingot ea 6T e tiisa.
Ka lebaka la condensation e sa lekaneng le shrinkage, phapang e khōlō ea mocheso pakeng tsa ka hare le ka ntle, khatello e kholo ea axial tensile, dendrite e ile ea phunyeha, ea etsa lekhalo la inter-axial ka har'a ingot, e ileng ea atolosoa ka ho eketsehileng nakong ea ho qhekella ho fetoha lekhalo ho forging spindle.

Bofokoli bo ka felisoa ka:
(1)Ho ntlafatsa bohloeki ba ho qhibilihisa tšepe e qhibilihisitsoeng;
(2) Ingot e pholile butle-butle, e fokotsa khatello ea mocheso;
(3) Sebelisa mochini o futhumatsang o motle le sekoaelo sa ho kenya letsoho, eketsa bokhoni ba ho tlatsa shrinkage;
(4) Sebelisa mokhoa oa ho etsa setsi sa compaction.

(2)Ho qapamapetsong a bakoang ke ho na hoa litšila tse kotsi tsa tšepe haufi le meeli ea lijo-thollo.

Sebabole ka har'a tšepe hangata se na le pula haufi le moeli oa lijo-thollo ka mokhoa oa FeS, eo ntlha ea eona e qhibilihang e leng 982 ℃ feela. Nakong ea mocheso oa 1200 ℃, THE Fes moeling oa lijo-thollo o tla qhibiliha ebe o pota-potile lijo-thollo ka mokhoa oa filimi ea mokelikeli, e tla senya maqhama pakeng tsa lijo-thollo le ho hlahisa fragility ea mocheso, 'me ho phunyeha ho tla etsahala ka mor'a ho qhekella hanyenyane.

Ha koporo e nang le tšepe e futhumatsoa moeeng oa peroxidation ho 1100 ~ 1200 ℃, ka lebaka la oxidation e khethehileng, libaka tse nang le koporo li tla theha holim'a lera. Ha solubility ea koporo ka austenite e feta ea koporo, koporo e ajoa ka mokhoa oa filimi ea metsi moeling oa lijo-thollo, e etsa koporo ea koporo 'me e sitoa ho etsoa.
Haeba ho na le tin le antimony ka tšepe, ho qhibiliha ha koporo ka austenite ho tla fokotseha ka botebo, 'me tšekamelo ea embrittlement e tla matlafatsoa.
Ka lebaka la dikahare tse phahameng tsa koporo, bokaholimo ba litšepe tsa tšepe bo na le oxidized ka mokhoa o ikhethileng nakong ea ho futhumala, e le hore koporo e matlafatsoe moeling oa lijo-thollo, 'me lekhalo la ho qhekella le thehoa ke nucleating le ho atoloha ho latela mohato o ruileng oa koporo oa moeli oa lijo-thollo.

(3)Ho qapa cracke bakoang ke heterogeneous phase (mohato oa bobeli)

Lisebelisoa tsa mochine oa karolo ea bobeli ka tšepe hangata li fapane haholo le tsa matrix a tšepe, kahoo khatello e eketsehileng e tla etsa hore mokhoa o akaretsang oa polasetiki o fokotsehe ha deformation e phalla. Hang ha khatello ea sebaka seo e feta matla a tlamang pakeng tsa mohato o fapaneng le matrix, karohano e tla etsahala 'me likoti li tla thehoa.
Ka mohlala, li-oxides, nitrides, carbides, borides, sulfide, silicates joalo-joalo ka tšepe.
Ha re re mekhahlelo ena e teteaneng.
Kabo ea ketane, haholo-holo haufi le moeli oa lijo-thollo moo matla a fokolang a tlamang a leng teng, mocheso o phahameng oa mocheso o tla qhoma.
Sebopeho sa macroscopic sa ho phatloha ho bakoang ke pula e ntle ea AlN haufi le moeli oa lijo-thollo oa li-ingots tse 20SiMn tsa tšepe tse 87t e entsoe ka oxid mme e hlahisoa joalo ka likristale tsa polyhedral columnar.
Tlhahlobo ea microscopic e bonts'a hore ho qhekella ho amana le palo e kholo ea lijo-thollo tse ntle tsa AlN haufi le moeli oa lijo-thollo.

Mehato ea ho thibela hothibela ho petsohae bakoang ke ho na ha aluminium nitride hammoho le kristale ke tse latelang:
1. Fokotsa palo ea aluminium e kentsoeng tšepe, tlosa naetrojene ho tšepe kapa thibela AlN pula ka ho eketsa titanium;
2. Amohela hot pelehi ingot le supercooled phase phetoho tshebetso tshebetso;
3. Eketsa mocheso oa ho fepa mocheso (> 900 ℃) le ho kenya mocheso ka ho toba;
4. Pele forging, lekaneng homogenization annealing e etsoa ho etsa lijo-thollo moeli pula e mokhahlelo diffusion.