(1) Umahluko ophambili phakathi kwezinto zentsimbi ezisetyenziselwa iindawo zetyathanga ekhaya nakwamanye amazwe ukwiipleyiti zetyathanga zangaphakathi nezangaphandle. Ukusebenza kwetyathanga kufuna amandla aphezulu okutsalwa kunye nokuqina okuthile. ETshayina, i-40Mn kunye ne-45Mn zihlala zisetyenziselwa ukwenziwa, kwaye intsimbi engama-35 ayisetyenziswa rhoqo. Ulwakhiwo lweekhemikhali lweepleyiti zentsimbi ezingama-40Mn kunye ne-45Mn lubanzi kunezo zentsimbi zangaphandle ze-S35C kunye ne-SAEl035, kwaye kukho ukubola kobukhulu obuyi-1.5% ukuya kwi-2.5% kumphezulu. Ke ngoko, ityathanga lidla ngokuba neengxaki zokuqhekeka emva kokucima kunye nokufudumala okwaneleyo.
Ngexesha lovavanyo lobunzima, ubunzima bomphezulu wepleyiti yetsheyini emva kokucima buphantsi (ngaphantsi kwe-40HRC). Ukuba ubukhulu obuthile bomaleko womphezulu buyaphela, ubunzima bungafikelela ngaphezu kwe-50HRC, nto leyo eya kuchaphazela kakhulu umthwalo omncinci wokutsalwa kwetsheyini.
(2) Abavelisi bamanye amazwe ngokubanzi basebenzisa i-S35C kunye ne-SAEl035, kwaye basebenzisa izitofu ze-carburizing zebhanti ye-mesh eziphucukileyo. Ngexesha lonyango lobushushu, kusetyenziswa umoya okhuselayo wonyango lokuvuselela i-carburizing. Ukongeza, ulawulo oluqinileyo lwenkqubo kwindawo luyasetyenziswa, ngoko ke iipleyiti zetyathanga azifane zenzeke. Emva kokucima nokufudumala, ukwaphuka okubuthathaka okanye ubunzima obuphantsi bomphezulu kwenzeka.
Uqwalaselo lweMetallographic lubonisa ukuba kukho inani elikhulu lesakhiwo se-martensite esifana nenaliti (malunga ne-15-30um) kumphezulu wepleyiti yetyathanga emva kokucima, ngelixa umbindi ufana nesakhiwo se-martensite esifana ne-strip. Phantsi kwemeko yobukhulu bepleyiti yetyathanga elifanayo, umthwalo omncinci wokutsalwa emva kokuthambisa mkhulu kunoweemveliso zasekhaya. Kumazwe angaphandle, kusetyenziswa iipleyiti ezinobukhulu obuyi-1.5mm kwaye amandla okutsalwa afunekayo yi->18 kN, ngelixa iitsheyini zasekhaya zihlala zisebenzisa iipleyiti ezinobukhulu obuyi-1.6-1.7mm kwaye amandla okutsalwa afunekayo yi->17.8 kN.
(3) Ngenxa yokuphuculwa okuqhubekayo kweemfuno zezixhobo zemixokelelwane yeebhayisekile, abavelisi basekhaya nabangaphandle bayaqhubeka nokuphucula intsimbi esetyenziselwa iiphini, imikhono kunye neeroli. Umthwalo omncinci wokutsalwa kwaye ngakumbi ukumelana nokuguguleka kwetsheyini kunxulumene nentsimbi. Emva kokuba abavelisi basekhaya nabangaphandle bekhethe intsimbi ye-20CrMnTiH njengezinto zephini endaweni ye-20CrMnMo, umthwalo wokutsalwa kwetsheyini unyuke nge-13% ukuya kwi-18%, kwaye abavelisi bangaphandle basebenzise intsimbi ye-SAE8620 njengezinto zephini kunye nemikhono. Oku kunxulumene noku. Ukuziqhelanisa kubonise ukuba kuphela ngokuphucula umsantsa wokulingana phakathi kwephini kunye nomkhono, ukuphucula inkqubo yonyango lobushushu kunye nokuthambisa, apho ukumelana nokuguguleka kunye nomthwalo wokutsalwa kwetsheyini kunokuphuculwa kakhulu.
(4) Kwiindawo zetsheyini yebhayisekile, ipleyiti yangaphakathi yekhonkco kunye nesleeve, ipleyiti yangaphandle yekhonkco kunye nephini zonke zinamathele kunye nokulingana kokuphazamiseka, ngelixa iphini kunye nesleeve zilingana kakuhle. Ukulingana phakathi kweendawo zetsheyini kunempembelelo enkulu ekuchaseni ukuguguleka kunye nomthwalo omncinci wokutsalwa kwetsheyini. Ngokweemeko ezahlukeneyo zokusetyenziswa kunye nemithwalo yomonakalo yetsheyini, yahlulwe yangamanqanaba amathathu: A, B kunye no-C. Iklasi A isetyenziselwa ukudluliselwa okunzima, okukhawulezayo kunye nokubaluleka; Iklasi B isetyenziselwa ukudluliselwa ngokubanzi; Iklasi C isetyenziselwa ukutshintsha kwegiya okuqhelekileyo. Ke ngoko, iimfuno zokudibanisa phakathi kweendawo zetsheyini zeKlasi A zingqongqo.
Ixesha lokuthumela: Sep-08-2023