Answer
17-7PH (Ubwoko 631) ibyuma bidafite ingese bigera kumiterere yabyo binyuze mukugabanya ubukonje no kugwa kwimvura. Iyo ushushanya ahantu hafite ubushyuhe bwo hejuru, kuruhuka cyangwa 'gushiraho' biterwa nuburyo bwo kuvura ubushyuhe (urugero, CH900). Kuruhuka byagereranijwe nuburinganire bwa Arrhenius aho igipimo cyibikurura ari $ \ epsilon = A \ sigma ^ n e ^ {- Q / RT} $. Kubwisoko yumuraba, guhangayikishwa $ \ sigma $ bigomba kubikwa munsi ya 75% yingufu ntoya ya CH900 ($ 210-240 $ ksi) kugirango ugabanye gushiraho burundu. Niba ubushyuhe bwo gukora burenze $ 650 ^ {\ umuzenguruko} F $ ($ 343 ^ {\ umuzenguruko} C $), ibikoresho bigira igihombo kinini cya modulike ya elastique, kandi igishushanyo kigomba guteshwa agaciro na 5-10% kugirango bibare kuruhuka.
