UNyango loBubushushu boMvula Ukwenza lukhuni iiNsimbi eziNgatyiwayo

I-precipitation hardening (PH) i-martensitic steel stainless iqulathe gabalala izinto ezidibanisayo ezifana nobhedu, ilothe, i-molybdenum, kunye ne-titanium ezenza isigaba sokuqina. Ezi zinto zokudibanisa zinokunyibilika okukhulu kwi-austenite, kodwa kuncinci kakhulu kwi-martensite. Ke ngoko, unyango lobushushu bemvula eyenza lukhuni intsimbi ye-martensitic kufuneka kuqala ibe lunyango oluluqilima lwesisombululo sokunyibilikisa ngokupheleleyo inqanaba eliqinileyo elirhangqwe kwimo yokuphosa. Emva koko unyango lokuqina kwemvula luqhutyelwa ukunyanzeliswa kwesigaba sokuqina kwesibini, ngaloo ndlela kuphuculwe amandla okuphosa insimbi engenasici kunye nokwenza kube nokuxhathisa okulungileyo kokuhlwa. Ukongeza, unyango lwesisombululo luya kuphucula ukusebenza kokusikaimvula yenza lukhuni iintsimbi zokusakha.

Iimpawu zoNyango loBubushushu boMvula Ukwenza lukhuni iiNsimbi eziNgatyiwayo:

• I-1) Ngaphambi konyango lwesisombululo, kufuneka ifudunyezwe kwi-650 ℃, kwaye ifudunyezwe ngokukhawuleza kwiqondo lokushisa elimiselweyo. Iicastings zinokulayishwa kwiziko kumaqondo obushushu aphezulu.
• I-2) Ukushisa kwesisombululo esiqinileyo ngokuqhelekileyo yi-1020-1060 ° C, kwaye ixesha lokubamba libalwe ngokunyuka okuhambelanayo kweyure ye-1 kwi-25 mm yokwanda kodonga. Ukwenziwa kweesanti ezinemilo entsonkothileyo, ubushushu besisombululo esiluqilima bungancitshiswa bube malunga ne-930°C.
• I-3) Ukuze kupheliswe ukungahambelani kwesakhiwo se-dendritic kunye nokuhlukaniswa kwecandelo kwi-castings enkulu yensimbi, kukulungele ukwenza unyango oluphezulu lwe-homogenization ngaphambi kwesisombululo esiqinileyo.
• I-4) Ukushisa kwonyango lokuguga kunokukhethwa ngokufanelekileyo ngokweemfuno zamandla, ukuqina kunye nokuqina kokuphosa.
• I-5) Ukuze kuphuculwe iimpawu zemishini ye-precipitation eqinisa i-castings yensimbi engenasici, emva kokunyanga kwesisombululo, ukupholisa umoya kwi-700-810 ° C kwiiyure ze-2, kwaye emva koko ukupholisa umoya kwi-620 ° C kwiiyure ze-4. Oku kunokuphucula kakhulu ukusebenza kokusika kwe-castings.