Nibihe bikoresho urunigi rwa moto rukozwe?

(1) Itandukaniro nyamukuru hagati yibikoresho byibyuma bikoreshwa mubice byumunyururu murugo no mumahanga biri mumasahani yimbere ninyuma.Imikorere ya plaque yumunyururu isaba imbaraga zingana kandi zikomeye.Mubushinwa, 40Mn na 45Mn muri rusange bikoreshwa mubikorwa byo gukora, naho ibyuma 35 ntibikoreshwa gake.Imiti igizwe na plaque 40Mn na 45Mn ni nini kuruta iy'ibyuma byo mu mahanga S35C na SAEl035, kandi hejuru ya 1.5% kugeza kuri 2,5% by'ubugari.Kubwibyo, isahani yumunyururu akenshi ibabazwa no kuvunika nyuma yo kuzimya nubushyuhe buhagije.
Mugihe cyikizamini cyo gukomera, hejuru yubuso bwurunigi nyuma yo kuzimya ni muke (munsi ya 40HRC).Niba umubyimba runaka wubuso bwarashaje, ubukana burashobora kugera kuri 50HRC, ibyo bizagira ingaruka zikomeye kumurongo ntarengwa wurunigi.
.Mugihe cyo kuvura ubushyuhe, ikirere gikingira gikoreshwa mukuvura recarburisation.Mubyongeyeho, igenzura rikomeye kurubuga rishyirwa mubikorwa, bityo ibyapa byurunigi ntibikunze kubaho.Nyuma yo kuzimya no gutwarwa, kuvunika gucitse cyangwa gukomera hasi kugaragara.
Kwitegereza ibyuma byerekana ko hari umubare munini wurushinge rwiza rusa na martensite (hafi 15-30um) hejuru yisahani yumunyururu nyuma yo kuzimya, mugihe intandaro ari imiterere ya martensite.Ukurikije ubunini bwurunigi rumwe, umutwaro ntarengwa nyuma yubushyuhe ni munini kuruta ibicuruzwa byo murugo.Mu bihugu by’amahanga, amasahani yuburebure bwa 1.5mm arakoreshwa muri rusange kandi ingufu zisabwa ni> 18 kN, mugihe iminyururu yo murugo muri rusange ikoresha isahani yubugari bwa 1,6-1.7mm naho imbaraga zisabwa ni> 17.8 kN.

.Umutwaro ntarengwa wa tensile na cyane cyane kwambara kwurunigi bifitanye isano nicyuma.Nyuma y’uko abakora mu gihugu no mu mahanga baherutse gutoranya ibyuma 20CrMnTiH nkibikoresho bya pin aho kuba 20CrMnMo, umutwaro w’urunigi wiyongereyeho 13% ugera kuri 18%, naho abanyamahanga bakoraga ibyuma bya SAE8620 nkibikoresho bya pin.Ibi nabyo bifitanye isano nibi.Imyitozo yerekanye ko gusa mugutezimbere ikinyuranyo gikwiye hagati yinini nintoki, kunoza uburyo bwo gutunganya ubushyuhe no gusiga, birashobora kwihanganira kwambara no kwikorera umutwaro wumunyururu.
.Ihuza hagati yiminyururu igira uruhare runini mukurwanya kwambara hamwe nuburemere buke bwurunigi.Ukurikije ibihe bitandukanye byo gukoresha no kwangiza imitwaro yumunyururu, igabanijwemo ibyiciro bitatu: A, B na C. Icyiciro A gikoreshwa mubikorwa biremereye, byihuta kandi byihuta;Icyiciro B gikoreshwa mugukwirakwiza rusange;Icyiciro C gikoreshwa muguhindura ibikoresho bisanzwe.Kubwibyo, ibisabwa byo guhuza hagati yicyiciro A cyumunyururu birakomeye.