Loluphi uhlobo lwentsimbi yentsimbi yesarha? Ngaba ifanelekile kwiimela?

Iibhleyidi zesarha zenziwa ngentsimbi ephezulu-yesantya (HSS), intsimbi yesixhobo sealloyi, okanye intsimbi yecarbide, ngokuxhomekeke kwisicelo. Isantya esiphezulu - sabona ii-blades (ezifana ne-M2 kunye ne-M42) ziqulethe izinto ze-alloying ezifana ne-tungsten kunye ne-molybdenum, enikezela ukuxhathisa ukushisa okuphezulu kwaye ifanelekile ukusika isinyithi. I-alloy tool steel saw blades (ezifana ne-9CrSi kunye ne-Cr12MoV) zifezekisa ubunzima obuphezulu ngonyango lokushisa kwaye zisetyenziselwa ukusika iinkuni okanye iiplastiki. I-Carbide saw blades (intsimbi ye-tungsten) isebenzisa i-tungsten carbide njenge-matrix kwaye inika ukuxhathisa okugqwesileyo kokunxiba, okuhlala kusetyenziselwa ukuchaneka kwe-machining. Ngokobuchwephesha, izixhobo ze-saw blade kufuneka zilinganise ubunzima, ukuqina, kunye nokumelana nobushushu. Isantya esiphezulu{11}}intsimbi igcina ubulukhuni bayo kumaqondo obushushu ukuya kuthi ga kwi-600 degree, iyenza ilungele ukusika ngokuqhubekayo. Isixhobo sensimbi ye-alloy sinokufikelela kubulukhuni be-HRC60 okanye ngaphezulu ngokucinywa kunye nokuqunjelwa, kodwa i-brittle ngakumbi. I-Carbide inokufikelela kubulukhuni be-HRA90, kodwa inika ukuchasana kwempembelelo encinci. Imigangatho yeshishini ngokuqhelekileyo ichaza ubulukhuni be-HRC58{22}}62 yeencakuba zesarha zokusika isinyithi kunye ne-HRC52-56 yeesarha zeplanga. Ingaba into efanelekileyo yokwenza iimela ixhomekeke kwimeko ethile. Xa intsimbi yesantya esiphezulu{27}}yesarha isarha iguqulwa ibe sisixhobo sokusika, ubulukhuni bayo obuphezulu kunye nokumelana nobushushu kunokwanelisa iimfuno ezithile, kodwa ifuna ukulola ngokutsha kunye nohlengahlengiso lwenkqubo yonyango lobushushu (efana nobushushu obuphantsi{31}}ukunciphisa uburhabaxa). I-alloy tool steel saw blades kunye nomxholo wekhabhoni ophakathi (njenge-0.9% -1.3%) ingenziwa kwizixhobo zokusika eziphezulu ngokusebenza kunye nokucima, kodwa ingqalelo kufuneka ihlawulwe ekunciphiseni uxinzelelo. I-Carbide saw blades ngokuqhelekileyo ayifanelekanga kwiimela ezithe ngqo ngenxa yobunzima bayo obuphezulu, ngaphandle kokuba isetyenziswe kwiimeko ezikhethekileyo (ezifana neemela zokukrola). Kwizicelo ezisebenzayo, kukho imiba emibini ebalulekileyo ekufuneka ijongwe xa kuguqulwa ii-saw blades: enye yinto efanayo (i-saw blades ininzi i-coil okanye i-forgings, enokuthi ibe nokuhlukana); enye kukuchaneka kwejometri (iincakuba zesarha zibhityile ngokubanzi kwaye zifuna ukupakishwa okanye ukuxutywa). Ngokubanzi, ezinye izinto ze-saw blade (ezifana ne-high-speed steel kunye ne-alloy tool metal) zingenziwa zibe ziimela emva kokuguqulwa, kodwa zifuna ukuqhutyelwa kobuchwephesha kunye nokuphathwa kobushushu, kwaye ukusebenza kwazo kungabi kuhle njengentsimbi yesixhobo esikhethekileyo.