(1) Umehluko omkhulu phakathi kwezinto zensimbi ezisetshenziselwa izingxenye zeketanga ekhaya nakwamanye amazwe usezindizeni zeketanga zangaphakathi nezangaphandle. Ukusebenza kweketanga kudinga amandla aphezulu okunamathela kanye nokuqina okuthile. EShayina, i-40Mn kanye ne-45Mn ngokuvamile zisetshenziselwa ukukhiqiza, kanti insimbi engu-35 ayisetshenziswa kakhulu. Ukwakheka kwamakhemikhali kwamaketanga ensimbi angu-40Mn kanye ne-45Mn kubanzi kunokwensimbi zakwamanye amazwe i-S35C kanye ne-SAEl035, futhi kukhona ukuhlukaniswa kobukhulu obungu-1.5% kuya ku-2.5% ebusweni. Ngakho-ke, iketanga leketanga livame ukuba nenkinga yokuphuka okubuthakathaka ngemva kokucinywa kanye nokushisa okwanele.
Ngesikhathi sokuhlolwa kobulukhuni, ubulukhuni bomphezulu wepuleti leketanga ngemva kokucinywa buphansi (ngaphansi kuka-40HRC). Uma ubukhulu obuthile besendlalelo somphezulu bugugile, ubulukhuni bungafinyelela ngaphezu kuka-50HRC, okuzothinta kakhulu umthwalo omncane wokudonsa weketanga.
(2) Abakhiqizi bakwamanye amazwe ngokuvamile basebenzisa i-S35C kanye ne-SAEl035, futhi basebenzisa izitofu ze-carburizing zebhande le-mesh ezithuthukisiwe kakhulu. Ngesikhathi sokwelashwa kokushisa, kusetshenziswa umoya ovikelayo wokwelashwa kokuvuselelwa kwe-carburizing. Ngaphezu kwalokho, kusetshenziswa ukulawulwa okuqinile kwenqubo endaweni, ngakho-ke ama-chain plate awavamile ukwenzeka. Ngemva kokucima nokushisa, kwenzeka ukuphuka okubuthakathaka noma ubulukhuni obuphansi bomphezulu.
Ukubuka kwe-Metallographic kukhombisa ukuthi kunenqwaba yesakhiwo se-martensite esifana nenaliti esincane (cishe ama-15-30um) ebusweni bepuleti leketanga ngemva kokucima, kuyilapho umongo uyisakhiwo se-martensite esifana ne-strip. Ngaphansi kwesimo sobukhulu bepuleti leketanga elifanayo, umthwalo omncane wokudonsa ngemva kokushisa mkhulu kunowemikhiqizo yasekhaya. Emazweni angaphandle, amapuleti anobukhulu obungu-1.5mm asetshenziswa ngokuvamile kanti amandla okudonsa adingekayo angama->18 kN, kuyilapho amaketanga asekhaya ngokuvamile esebenzisa amapuleti anobukhulu obungu-1.6-1.7mm kanti amandla okudonsa adingekayo angama->17.8 kN.
(3) Ngenxa yokuthuthuka okuqhubekayo kwezidingo zezingxenye zeketanga lezithuthuthu, abakhiqizi basekhaya nabangaphandle bayaqhubeka nokuthuthukisa insimbi esetshenziselwa amaphini, imikhono nama-roller. Umthwalo omncane wokudonswa futhi ikakhulukazi ukumelana nokuguguleka kweketanga kuhlobene nensimbi. Ngemuva kokuthi abakhiqizi basekhaya nabangaphandle bakhethe insimbi engu-20CrMnTiH njengento yephini esikhundleni se-20CrMnMo, umthwalo wokudonswa kweketanga wanda ngo-13% waya ku-18%, kanti abakhiqizi bangaphandle basebenzise insimbi ye-SAE8620 njengento yephini kanye ne-sleeve. Lokhu kuhlobene nalokhu. Umkhuba ukhombisile ukuthi kuphela ngokuthuthukisa igebe lokulingana phakathi kwephini kanye ne-sleeve, ukuthuthukisa inqubo yokwelapha ukushisa kanye nokuthambisa, lapho ukumelana nokuguguleka kanye nomthwalo wokudonswa kweketanga kungathuthukiswa kakhulu.
(4) Ezingxenyeni zeketanga lesithuthuthu, ipuleti lesixhumanisi sangaphakathi kanye nesleeve, ipuleti lesixhumanisi sangaphandle kanye nephini konke kuqiniswe ndawonye ngokulingana kokuphazamiseka, kuyilapho iphini kanye nesleeve kufaneleka kahle. Ukulingana phakathi kwezingxenye zeketanga kunethonya elikhulu ekumelaneni nokuguguleka kanye nomthwalo omncane wokuthambekela weketanga. Ngokwezikhathi ezahlukene zokusetshenziswa kanye nemithwalo yomonakalo yeketanga, ihlukaniswe ngamazinga amathathu: A, B kanye no-C. Isigaba A sisetshenziselwa ukudluliselwa okunzima, okusheshayo kanye nokubalulekile; Isigaba B sisetshenziselwa ukudluliselwa okuvamile; Isigaba C sisetshenziselwa ukushintsha igiya okuvamile. Ngakho-ke, izidingo zokuxhumanisa phakathi kwezingxenye zeketanga zesigaba A ziqinile.
Isikhathi sokuthunyelwe: Septhemba-08-2023