Kodi Macheka Ndi Chitsulo Chotani? Kodi Ndi Yoyenera Kupanga Mipeni?

Ma saw blade nthawi zambiri amapangidwa ndi high-speed steel (HSS), alloy tool steel, kapena carbide steel, malingana ndi ntchito yake. -Zovala zachitsulo zothamanga kwambiri (monga M2 ndi M42) zimakhala ndi ma alloying monga tungsten ndi molybdenum, zomwe zimateteza kutentha kwambiri komanso zoyenera kudula zitsulo. Aloyi chida zitsulo macheka masamba (monga 9CrSi ndi Cr12MoV) kupeza kuuma mkulu kudzera kutentha kutentha ndipo ambiri ntchito kudula nkhuni kapena mapulasitiki. Masamba a Carbide (chitsulo cha tungsten) amagwiritsa ntchito tungsten carbide ngati matrix ndipo amapereka kukana kwabwino kwambiri, komwe amagwiritsidwa ntchito popanga makina olondola. Mwaukadaulo, zida za tsamba la macheka ziyenera kulinganiza kuuma, kulimba, komanso kukana kutentha. -Chitsulo chothamanga kwambiri chimasunga kulimba kwake potentha mpaka madigiri 600 , zomwe zimapangitsa kuti zikhale zoyenera kudula mosalekeza. Chitsulo cha aloyi chimatha kufikira kuuma kwa HRC60 kapena kupitilira apo pozimitsa ndi kutentha, koma ndizovuta kwambiri. Carbide imatha kufikira kuuma kwa HRA90, koma imapereka kukana kocheperako. Miyezo yamakampani imatchula kuuma kwa HRC58-62 pazitsulo zocheka zitsulo ndi HRC52-56 za macheka amatabwa. Kaya chinthu ndi choyenera kupanga mipeni zimadalira momwe zinthu zilili. -chingwe chachitsulo chothamanga kwambiri chikasinthidwa kukhala chida chodulira, kulimba kwake kwakukulu ndi kukana kutentha kungathe kukwaniritsa zofunikira zina, koma kumafunika kukonzanso ndi kusintha ndondomeko ya kutentha (monga kutsika{31}}kutentha kuti muchepetse kuphulika). Aloyi chida zitsulo macheka masamba ndi zolimbitsa mpweya zili (monga 0.9% -1.3%) akhoza kukhala zida zodulira mkulu ntchito popanga ndi kuzimitsa, koma chidwi ayenera kuperekedwa kuti kuchepetsa nkhawa. Mipeni ya Carbide nthawi zambiri si yoyenera kupangira mipeni yolunjika chifukwa champhamvu kwambiri, pokhapokha ngati ikugwiritsidwa ntchito pazochitika zapadera (monga mipeni yozokota). Muzogwiritsira ntchito, pali zinthu ziwiri zazikulu zomwe ziyenera kuganiziridwa potembenuza masamba a macheka: imodzi ndiyo kufanana kwakuthupi (mawonekedwe a macheka nthawi zambiri amakhala ma coils kapena forgings, omwe angakhale ndi tsankho); chinacho ndi kulondola kwa geometric (masamba nthawi zambiri amakhala owonda ndipo amafunikira kusanjika kapena kusanja). Ponseponse, zida zina zamasamba (monga chitsulo chothamanga kwambiri ndi chitsulo cha aloyi) zitha kupangidwa kukhala mipeni pambuyo pa kusinthidwa, koma zimafunikira kuwongolera kwaukadaulo ndi chithandizo cha kutentha, ndipo magwiridwe antchito awo sangakhale abwino ngati zida zapadera zachitsulo.