Zipangizo zamakina a ulimi: masamba a pulawo, chitsulo cha manganese chokhuthala komanso chosatha ntchito cha 65, choyenera minda yosiyanasiyana youma ndi ya mpunga.
Monga gawo lofunika kwambiri pa makina olima ulimi omwe amakhudza nthaka mwachindunji ndipo amakumana ndi kukangana kwakukulu komanso kukhudzidwa, ubwino wa pulawo umatsimikizira mwachindunji momwe ulimi umagwirira ntchito, mtengo wa mafuta, komanso momwe nthaka imaswekera. Pulowo uwu wapangidwira makamaka malo ouma kwambiri, minda ya mpunga, ndi nthaka yadothi, pogwiritsa ntchito njira zapamwamba zachitsulo komanso kukonza bwino kapangidwe kake kuti apatse ogwiritsa ntchito chidziwitso chabwino chogwira ntchito chomwe chimadziwika ndi "kulowa kwa nthaka yokhazikika, kukana kotsika, komanso kukana kutopa kolimba."
Chogulitsachi chimapangidwa kuchokera ku zipangizo zamphamvu kwambiri monga chitsulo cha manganese cha 65Mn ndi chitsulo cha boron cha 30MnB, ndipo chimapangidwa mokhazikika kudzera mu kupangira kotentha, kuonetsetsa kuti kapangidwe ka mkati kamakhala kolimba komanso kuchotsa mavuto a mabowo amchenga omwe amapezeka mu castings. Pambuyo pake, kudzera mu njira zoziziritsira kutentha ndi kutentha, kuuma kwa tsamba la pulawo kumafika pa HRC 38-45, pomwe pakati pake pamakhala kulimba kwabwino kwambiri. Khalidwe la "kulimba kunja ndi kulimba mkati" limalola kuti lipirire kugwedezeka kwakukulu kuchokera ku miyala ndi mizu ya mitengo (popanda kusweka) ndikusunga m'mphepete wakuthwa kwa nthawi yayitali, ndikuwonjezera kwambiri nthawi yosinthira.
1、Kapangidwe ka malo opindika bwino: Tinakonza ngodya yodulira ndi kupindika kwa tsamba la pulawo. Kapangidwe kameneka kamachepetsa kumatirira kwa nthaka, kumachepetsa kukana kwa kulima ndi pafupifupi 15%-20%, motero kupulumutsa kugwiritsa ntchito mafuta a thirakitala ndikuwonjezera magwiridwe antchito.
2、Ukadaulo wodzinola: Pa m'mphepete zodulira zodula kwambiri, timagwiritsa ntchito chiŵerengero chapadera cha zinthu. Mukagwiritsa ntchito, pamwamba pa tsamba logwirira ntchito pamakhala zotsatira za "kudzinola", zomwe zimapangitsa kuti m'mphepete mwake mukhale wakuthwa nthawi zonse komanso kupewa "kukoka" komwe kumachitika chifukwa cha kufooka. Izi zimatsimikizira kuzungulira kwa tsamba losalala komanso kuphimba bwino.
3、Mawonekedwe olondola oyika: Ma mold amapangidwa motsatira miyezo yoyambirira ya fakitale, ndipo malo oyika mabowo ndi malo olekerera pamwamba amayendetsedwa mkati mwa mtunda wochepa kwambiri, kuonetsetsa kuti akugwirizana 100% ndi mzati wa pulawo ndi pulawo. Izi sizimangopangitsa kuti njira yoyika ikhale yosavuta komanso zimalepheretsa kumasuka kwa bolt kapena kusintha kwa tsamba chifukwa cha mipata yambiri.
Mapulawu osiyanasiyanawa amagwirizana kwambiri ndi zida zosiyanasiyana zolima monga mapulawu a bolodi, mapulawu osinthika, ndi ma ditcher. Kaya amagwiritsidwa ntchito pomasula kwambiri ndi kulima pambuyo pokolola kapena kuswa nthaka ndi kukonzekera musanabzale, amasonyeza kuti amatha kusinthasintha kwambiri. Ndi oyenera makamaka mikhalidwe yosiyanasiyana yovuta ya nthaka m'madera monga dera la dothi lakuda kumpoto chakum'mawa kwa China, dera la mchenga kumpoto chakumadzulo kwa China, ndi dera la dothi lofiira kum'mwera kwa China.
