Brittle tempering thempereichara e thehiloeng holim'a li-tubes tse nepahetseng e ka aroloa ka mocheso o tlase le o phahameng oa temper brittleness temper brittleness.

Ka mor'a tempering brittleness precision tube alloy steel quenched martensite ka mocheso o fapaneng oa 250 ~ 400 ℃ tempered steel embrittlement eo mocheso oa phetoho ea brittle ductile o eketsehile haholo. E hlaha haholo-holo ka tšepe ea tšepe e entsoeng ka motsoako oa tšepe le li-tubes tse nepahetseng tse nang le matla a tlaase. E se e le brittle fracture precision tubes is intergranular fracture kapa quasi-cleavage le intergranular fracture e kopane. Sesosa tempering brittleness, ka kakaretso nkoa: (1) le cementite nakong tempering ho lakane ka ea pele austenite lijo-thollo mellwane, etsa hore lijo-thollo moeli embrittlement li amana haufi-ufi. (2) likarolo tse sa hloekang tse kang phosphorus ka austenite lijo-thollo moeli karohano e boetse ke e 'ngoe ea mabaka a tempering brittleness. Phosphorus e ka tlase ho 0.005% li-tubes tse hlakileng tsa bohloeki ha li hlahise brittleness ea mocheso o tlase. Phosphorus e hlaha ka har'a meeli ea lijo-thollo tsa austenite ha karohano ea ho futhumatsa mollo ka mor'a ho tima e bolokiloe. Phosphorus ka austenite lijo-thollo moeli karohano le cementite nakong tempering ka mellwane ea pele ea lijo-thollo austenite, lintlha tsena tse peli bakile hore intergranular brittle fracture, tlatselitse ho tempering brittleness etsahala.

Precision tube alloying elements li na le tšusumetso e kholo ho brittleness ea mocheso o tlase. Chromium le manganese li khothaletsa karohano ea likarolo tse sa hloekang joalo ka phosphorus meeling ea lijo-thollo tsa austenite, ka hona, ho kenya letsoho ho fokotseng brittleness, tungsten le vanadium ha li na phello, molybdenum e senya matla a phetoho ea mocheso ea mocheso o futhumatsang li-tubes tse nepahetseng, empa e ne e se thibelo e lekaneng ea brittleness. . Ha silicon e ka chechisa pula ea cementite, e hlahisang keketseho ea mocheso, hoa khoneha ho ntlafatsa li-tubes tse nepahetseng tse futhumatsang mocheso.