Unobangela wokungaphumeleli kokuqhekeka emva kweenyanga ezili-18 zesihluzi sentsimbi engenasiphene sisebenze iinyanga ezili-18, kwaye ivalve yokwaphuka yabhaqwa yaza yahlalutywa ivalve yokuphuka, izicubu zesigaba segolide, kunye nokwakheka kweekhemikhali.Iziphumo zibonisa ukuba indawo eqhekekileyo yevalve liqokobhe kwaye into yokucoca iphinda ivavanye isiza, oko kukuthi, ukumelana neyona ndawo inkulu yoxinzelelo lwerhasi, umthombo wokhukuliseko kunye nomthombo wokuqhekeka ovela kwingcambu yomsonto ongaphakathi. , yandiswe kumphezulu wangaphakathi weqokobhe levalvu ukuya ngaphandle Isixhobo se-ferrite + martensite izicubu zamacala amabini, kunye nenqaku lomthamo we-perchine tissue yi-15% ukuya kwi-25%.Ngaphantsi kwevalve umzimba owaphukileyo umlomo sicaba, kwaye iintanda phakathi iinkozo zonke, ebonisa iimpawu amaqhekeza crispy.Kukho ukutenxa okukhulu kwi-CR kunye nomxholo we-Ni kwisakhiwo somzimba wevalve yokucoca, kunye nomxholo we-ferrite mkhulu kune-10%, okunciphisa ukuqina kweplastiki yezinto.Lo ngumba wendalo ekusilela kwezinto;Ukhukuliseko luxutywe kunye nesigaba sesibini se-carbon-rich kunye ne-chromium ekubuyiseleni izinto eziphathekayo, kunye nokuqhekeka kwindawo apho ugxininiso loxinzelelo lugxininiswe.Ngaphantsi kwempembelelo yoxinzelelo olutshintshileyo, ukuqhekeka kwandiswa ngakumbi, kwaye izinto ziya kuphuka ekugqibeleni.