Ibanga lokushisa elinokushisa eliqinile elisuselwe kumashubhu anembayo lingahlukaniswa libe izinga lokushisa eliphansi neliphezulu lolaka olufuthekayo.

Ngemuva kokushisa kwe-brittleness precision tube alloy steel yacisha i-martensite ebangeni lokushisa elingama-250 ~ 400 ℃ i-embrittlement yensimbi efudumele lapho izinga lokushisa lokuguquka kwe-brittle ductile likhuphuke kakhulu. Kwenzeka kakhulu kunsimbi yesakhiwo ingxubevange kanye namashubhu ane-alloy aphansi amandla aphezulu anemba. Kakade amashubhu anokunemba okuphuka kwe-brittle kuwukuphuka kwe-intergranular noma i-quasi-cleavage kanye ne-intergranular fracture exutshiwe. Imbangela yokuqina kokuqina, okuvame ukucatshangelwa: (1) kanye nosimende ngesikhathi sokushisa ishidi emingceleni yasekuqaleni yezinhlamvu ze-austenite, okubangela ukuqina komngcele wokusanhlamvu kuhlobene eduze. (2) izakhi zokungcola ezifana ne-phosphorus ekuhlukaniseni umngcele wezinhlamvu ze-austenite futhi kungesinye sezizathu ezibangela ukuqina. I-Phosphorus engaphansi kuka-0.005% wamashubhu wokunemba okuphezulu awakhiqizi ukufutheka kwezinga lokushisa eliphansi. I-Phosphorus ivela emingceleni yezinhlamvu ze-austenite lapho ukuhlukaniswa kokushisa komlilo ngemuva kokucisha kugcinwe. Phosphorus in austenite okusanhlamvu ukuhlukaniswa komngcele kanye usimende ngesikhathi tempering emingceleni yangaphambili okusanhlamvu austenite, lezi zici ezimbili zabangela intergranular brittle fracture, kube nomthelela brittleness tempering kwenzeka.

Ama-elementi e-Precision tube alloying anomthelela omkhulu ku-brittleness yezinga lokushisa eliphansi. I-Chromium ne-manganese ikhuthaza ukuhlukaniswa kwezakhi zokungcola njenge-phosphorus emingceleni yokusanhlamvu kwe-austenite, ngaleyo ndlela ibe nomthelela ekufutheni, i-tungsten ne-vanadium ayizange ibe nomphumela, i-molybdenum yenza ukuqina kokuguquka kwezinga lokushisa okufiphalayo okuthambisa ukunemba kwamashubhu, kodwa ukunqanda ukufutheka okwanele. . Uma i-silicon ingahlehlisa ukuna kukasimende opholile, okukhiqiza ukunyuka kwezinga lokushisa, kungenzeka ukuthuthukisa ukunemba kwamashubhu okuthambisa izinga lokushisa okwenzekayo.