(1) Umahluko omkhulu phakathi kwezinto zentsimbi ezisetyenziselwa iinxalenye zekhonkco ekhaya nakwamanye amazwe zingaphakathi kwiiplate zekhonkco zangaphakathi nangaphandle.Ukusebenza kwepleyiti yekhonkco kufuna amandla aphezulu kunye nokuqina okuthile.E-China, i-40Mn kunye ne-45Mn ngokuqhelekileyo isetyenziselwa ukuvelisa, kwaye i-35 yensimbi ayifane isetyenziswe.Ukwakhiwa kweekhemikhali ze-40Mn kunye ne-45Mn iiplate zensimbi zibanzi kunezo ze-S35C zangaphandle kunye ne-SAEl035 steels, kwaye kukho i-1.5% ukuya kwi-2.5% ye-decarburization ebusweni.Ke ngoko, ipleyiti yetyathanga ihlala inengxaki yokuqhekeka kwe-brittle emva kokucinywa kunye nobushushu obaneleyo.
Ngethuba lovavanyo lobunzima, ubunzima bomphezulu we-chain plate emva kokucima buphantsi (ngaphantsi kwe-40HRC).Ukuba ubungqingqwa obuthile bomaleko womphezulu bugugile, ukuqina kunokufikelela ngaphezulu kwe-50HRC, okuya kuthi kuchaphazele ngokunzulu owona mthwalo uphantsi wokuqina wekhonkco.
(2) Abavelisi bamazwe angaphandle basebenzisa i-S35C kunye ne-SAEl035, kwaye basebenzise i-mesh eqhubekayo eqhubekayo yokutshisa i-carburizing furnaces.Ngethuba lokunyanga ukushisa, umoya okhuselayo usetyenziselwa unyango lwe-recarburization.Ukongeza, ulawulo lwenkqubo olungqongqo kwisiza luyaphunyezwa, ngoko ke iipleyiti zekhonkco azifane zenzeke.Emva kokucima kunye nokufudumala, i-brittle fracture okanye ukuqina okuphantsi komhlaba kwenzeka.
Uqwalaselo lwe-metallographic lubonisa ukuba kukho isixa esikhulu seenaliti ezicolekileyo ezifana ne-martensite isakhiwo (malunga ne-15-30um) kumphezulu wepleyiti yetyathanga emva kokucima, ngelixa i-core is strip-like martensite structure.Ngaphantsi kwemeko yobukhulu obufanayo beplate yetsheyini, ubuncinci bomthwalo we-tensile emva kobushushu bukhulu kuneemveliso zasekhaya.Kumazwe angaphandle, iipleyiti ezityebileyo eziyi-1.5mm zidla ngokusetyenziswa kwaye amandla okuqina afunekayo yi>18 kN, ngelixa amatyathanga asekhaya ngokuqhelekileyo asebenzisa iipleyiti ezishinyeneyo eziyi-1.6-1.7mm kwaye amandla okuqina afunekayo yi>17.8 kN.
(3) Ngenxa yokuphuculwa okuqhubekayo kweemfuno zeengxenye zekhonkco lezithuthuthu, abavelisi basekhaya nabangaphandle bayaqhubeka nokuphucula intsimbi esetyenziselwa izikhonkwane, imikhono kunye neerola.Ubuncinci bomthwalo obuncinci kwaye ngokukodwa ukunyanzeliswa kokugqoka kwekhonkco kuhambelana nentsimbi.Emva kokuba abavelisi basekhaya nabangaphandle basanda kukhetha intsimbi ye-20CrMnTiH njengesixhobo se-pin endaweni ye-20CrMnMo, umthwalo we-chain tensile wanda nge-13% ukuya kwi-18%, kwaye abavelisi bangaphandle basebenzisa i-SAE8620 yensimbi njengephini kunye nempahla yomkhono.Oku kukwanxulumene noku.Ukuziqhelanisa kubonise ukuba kuphela ngokuphucula i-gap efanelekileyo phakathi kwepini kunye ne-sleeve, ukuphucula inkqubo yonyango lokushisa kunye ne-lubrication, ingaba ukunyanzeliswa kokugqoka kunye nomthwalo we-tensile we-chain ungaphuculwa kakhulu.
4Ukulungelelaniswa phakathi kwamalungu ekhonkco kunempembelelo enkulu ekuxhathiseni ukunxiba kunye nomthwalo ophantsi we-tensile wekhonkco.Ngokwezihlandlo ezahlukeneyo zokusetyenziswa kunye nemithwalo yomonakalo wekhonkco, ihlukaniswe ngamanqanaba amathathu: A, B kunye noC. Iklasi A isetyenziselwa ukuhanjiswa okunzima, ukukhawuleza kunye nokubalulekileyo;Udidi B lusetyenziselwa ukusasaza ngokubanzi;Udidi C lusetyenziselwa ukutshintsha izixhobo eziqhelekileyo.Ke ngoko, iimfuno zolungelelwaniso phakathi kwamacandelo eKlasi A angqongqo.
Ixesha lokuposa: Sep-08-2023