Answer
Impagarike ntarengwa yo gukora $ \ sigma $ iboneka hejuru yumuraba kandi itangwa na $ \ sigma = \ frac {1.5 \ pi P D_m C_f} {Z ^ 2 b t ^ 2} $, aho $ C_f $ nikintu cyo guhangayikishwa na geometrie. Kuri 17-7PH ibyuma bidafite ingese muburyo bwa CH900, imbaraga zingana $ UTS $ ni hafi $ 200-230 $ ksi. Kugirango ubuzima bwumunaniro butagira akagero (burenga $ 10 ^ 6 $ cycle), guhangayikishwa nigikorwa cyo gutandukana cyane bigomba kubikwa munsi yumupaka wihanganira umunaniro, mubisanzwe $ 45-50 \% $ ya $ UTS $ kubidukikije bitangirika. Niba porogaramu irimo gusiganwa ku magare menshi, hagomba gukorwa isesengura ryiza rya Goodman cyangwa Gerber, utegura impagarara zingana $ \ sigma_m = (\ sigma_ {max} + \ sigma_ {min}) / 2 $ kurwanya ihindagurika ry’imihindagurikire $ \ sigma_a = (\ sigma_ {max} - \ sigma_ {min}) / 2 $.
