Kunyango lobushushu lokubumba, ngenxa yamandla amakhulu eziko lokufudumeza kunye nexesha elide lokugquma, ukusetyenziswa kwamandla kukhulu kuyo yonke inkqubo, kwixesha elide, indlela yokugcina amandla kunyango lobushushu lokubumba kuye kwaba njalo. ingxaki enzima.

Okubizwa ngokuba yi "zero insulation" ukucima, kukwalatha ukufudumeza forging, umphezulu wayo kunye core ukufikelela ubushushu ukucima ubushushu, akukho ukugquma, ngoko nangoko ukucima inkqubo yokupholisa.Ngokutsho theory yemveli austenitic, forging kufuneka ibe elide. ixesha lokugquma kwinkqubo yokufudumeza, ukuze kugqitywe i-nucleation kunye nokukhula kweenkozo ze-austenitic, ukuchithwa kwe-cementite eshiyekileyo kunye ne-homogenization ye-austenitic.I-teknoloji yangoku yokucima kunye nokufudumeza kwe-forgings iveliswa phantsi kwesikhokelo sale nkcazo. inkqubo yangoku yokucima, "zero ukugcinwa ubushushu" ukucima kusindisa ixesha logcino ubushushu efunwa homogenization yesakhiwo austenitic, hayi kuphela kunokonga 20% -30% amandla, ukuphucula ukusebenza kwemveliso 20% -30%, kodwa kunokunciphisa okanye ukuphelisa iziphene ze-oxidation, i-decarbonization, i-deformation kunye nokunye, okulungele ukuphuculwa komgangatho wemveliso.

Xa i-carbon steel kunye nentsimbi ephantsi ye-alloy ishushu kwi-Ac1 okanye i-Ac2, inkqubo ye-homogenization ye-austenite kunye nokuchithwa kwe-carbides kwi-pearlite ikhawuleza.Xa ubungakanani bentsimbi buyingxenye yecandelo elincinci, ukubalwa kwexesha lokufudumala akudingi kuqwalasela. Ukugquma kwe-thermal, oko kukuthi, ukufikelela kwi-zero thermal insulation quenching.Ngokomzekelo, xa ububanzi okanye ubukhulu be-45 workpiece yensimbi ayikho ngaphezu kwe-100mm, ukufudumeza kwisithando somoya, ubushushu bomphezulu kunye nombindi kuphantse kufikeleleke. ngexesha elifanayo, ngoko ixesha layo elifanayo lingahoywa, xa lithelekiswa nenkqubo yemveli yokuvelisa (r = aD) kunye ne-coefficient enkulu yokufudumeza, inokuncitshiswa malunga ne-20% -25% yokucima ixesha lokufudumeza.

Uhlalutyo lwethiyori kunye neziphumo zovavanyo lubonisa ukuba kunokwenzeka ukwamkela "i-zero insulation" ekucimeni nasekufudumeni okuqhelekileyo kwentsimbi yesakhiwo. Ngokukodwa, i-45, 45 mn2 yentsimbi ye-carbon structural okanye i-alloy element enye yentsimbi yesakhiwo, ukusetyenziswa kwe-"zero insulation" inkqubo inokuqinisekisa iimpawu mechanical iimfuno;45, 35CrMo, GCrl5 kunye nezinye workpiece intsimbi, ukusetyenziswa "zero insulation" zokufudumeza ngaphezu zokufudumeza zemveli kunokonga ixesha zokufudumeza malunga 50%, ukonga amandla iyonke 10% - I-15%, ukuphucula ukusebenza kakuhle kwe-20% -30%, ngexesha elifanayo "i-zero insulation" inkqubo yokucima inceda ukucokisa okusanhlamvu, ukuphucula amandla.

(Ukusuka kwi: 168 forgings net)