Kutentha kocheperako kutengera machubu olondola amatha kugawidwa m'malo otsika komanso okwera kutentha kupsa mtima kwamphamvu.

Pambuyo kutentha brittleness mwatsatanetsatane chubu aloyi zitsulo kuzimitsa martensite pa kutentha osiyanasiyana 250 ~ 400 ℃ kupsa chitsulo embrittlement chimene Chimaona ductile kusintha kutentha kutentha kwambiri.Amapezeka makamaka muzitsulo zazitsulo zopangira zitsulo ndi machubu otsika kwambiri amphamvu kwambiri.Machubu omwe kale amathyoka kwambiri amathyoka pakati pa granular kapena quasi-cleavage ndi intergranular fracture wosakanikirana.Zomwe zimayambitsa kuzizira, zomwe nthawi zambiri zimaganiziridwa: (1) ndi simenti pakutentha kwa pepala m'malire ambewu ya austenite yoyambirira, zomwe zimapangitsa kuti malire a tirigu awonongeke ndizogwirizana kwambiri.(2) zinthu zodetsa monga phosphorous mu kugawanika kwa malire a austenite ndi chimodzi mwazifukwa zomwe zimapangitsa kuti brittleness ikhale yovuta.Phosphorus yochepera 0.005% machubu oyeretsedwa kwambiri samatulutsa kuzizira kocheperako.Phosphorus amapezeka mu malire austenite tirigu pamene moto Kutentha tsankho pambuyo quenching anasunga.Phosphorus mu austenite tirigu malire tsankho ndi simenti pa tempering mu malire akale austenite tirigu, zinthu ziwirizi anachititsa intergranular Chimaona fracture, zinathandiza tempering brittleness kumachitika.

Precision chubu alloying zinthu zimakhudza kwambiri kutsika kutentha brittleness.Chromium ndi manganese zimalimbikitsa tsankho la zinthu zodetsedwa monga phosphorous m'malire a mbewu za austenite, motero zimathandizira kuti brittleness, tungsten ndi vanadium zisakhale ndi zotsatirapo, molybdenum imasokoneza kulimba kwa kusintha kwa kutentha komwe kumatenthetsa bwino machubu, koma osaletsa kukhazikika kwamphamvu. .Pamene silikoni akhoza kuchedwetsa mpweya cementite mpweya, amene amapanga kutentha kuwonjezeka, ndi zotheka kusintha mwatsatanetsatane machubu kutentha kutentha brittleness zinachitika.