I-42CrMo i-alloy yentsimbi yomenzi wewaranti yokuthengisa
Injongo ye-42CrMo ipayipi yensimbi engenamthungo: intsimbi ekhethekileyo yebhulorho yi "42CrMo", intsimbi ekhethekileyo ye-automobile girder yi "42CrMo", kunye nentsimbi ekhethekileyo yesitya soxinzelelo "42CrMo". Olu hlobo lwensimbi luphucula iimpawu zemishini yensimbi ngokulungelelanisa umxholo wekhabhoni (c). Ngoko ke, ngokomxholo wekhabhoni, olu hlobo lwensimbi lunokwahlulwa lube: intsimbi ephantsi yekhabhoni - umxholo wekhabhoni ngokuqhelekileyo ungaphantsi kwe-0.25%, njenge-10 kunye ne-20 yensimbi; Insimbi ye-carbon ephakathi - umxholo wekhabhoni uphakathi kwe-0.25 ~ 0.60%, njenge-35 kunye ne-45 yensimbi; I-carbon steel ephezulu - umxholo wekhabhoni ngokubanzi mkhulu kune-0.60%. Olu hlobo lwentsimbi alusetyenziswa ngokubanzi ekwenzeni imibhobho yentsimbi. Intsimbi ye-42CrMo yintsimbi eyomelele kakhulu ngamandla kunye nokuqina, ukuqina okuhle, akukho brittleness ecacileyo, ukudinwa okuphezulu kunye nokumelana neempembelelo ezininzi emva kokucima kunye nonyango olushushu, kunye nokuqina okuhle kobushushu obuphantsi. Intsimbi ye-42CrMo ilungele ukuvelisa imingundo yeplastiki enkulu kunye nobukhulu obuphakathi efuna amandla athile kunye nokuqina. Ubunzima: i-annealed, 147 ~ 241hb, 42CrMo
Amandla okuqina σ b (MPa): ≥1080(110)
Amandla esivuno σ s (MPa): ≥930(95)
Ubude δ 5 (%): ≥12
Ukunciphisa indawo ψ (%): ≥45
Amandla empembelelo Akv (J): ≥ 63
Ixabiso lokuqina kwempembelelo α kv (J/cm2): ≥78(8)
Ukuqina: ≤ 217hb
Ukuze kuphuculwe ubomi benkonzo yokufa ukuya kumaxesha angaphezu kwama-800000, indlela yokuqina yokucima kunye nobushushu obuphantsi bobushushu bunokuphunyezwa kwintsimbi yangaphambili. Ngexesha lokucima, kuya kutshiswa kwi-500-600 ℃ kwiiyure ze-2-4, emva koko igcinwe kwi-850-880 ℃ ixesha elithile (ubuncinci iiyure ezi-2), ipholile kwioli ukuya kwi-50-100 ℃ kwaye ipholile ngomoya. Ukuqina emva kokucima kunokufikelela kwi-50-52hrc. Ukuze kuthintelwe ukuqhekeka, kuya kuthotywa kubushushu obungama-200 ℃ ngoko nangoko. Emva kokufudumala, ubunzima bunokugcinwa ngaphezu kwe-48hrc. Inkqubo yonyango ye-vanadization yetyuwa engathathi hlangothi yentsimbi ye-42CrMo. Uluhlu lwe-carbide lunokufumaneka ngokuhlamba ityuwa engathathi hlangothi unyango lwe-vanadization ye-42CrMo yentsimbi.
1. Ikhompawundi yeCarbon vanadium, umaleko we-carburized unesakhiwo esifanayo, ukuqhubeka kakuhle kunye nokubumbana, ubukhulu obufanayo, ukwakheka kwe-compact, ubuncinci obuphezulu kunye nokumelana nokunxiba okuphezulu, kunye nokuqina komphezulu, ukumelana nokunxiba kunye nokuxhathisa ukunamathela kuphuculwe kakhulu.
2.I-solubility ye-VC kwi-austenite iphezulu kune-ferrite. Ngokuhla kweqondo lobushushu, i-VC ikhula kwi-ferrite, eyenza i-alloy yomeleze kwaye icokiseke iinkozo, kwaye umaleko wekhompawundi ubonisa ubunzima obuphezulu. I-42CrMo insimbi yeyekhabhoni ephezulu kunye ne-chromium ephezulu ye-ledeburite yensimbi, enomxholo ophezulu we-carbide, ibalwa malunga ne-20%, kwaye idla ngokusasazwa ngokungafaniyo kwibhanti okanye kwinethiwekhi, ngokuhlukana okukhulu. Nangona kunjalo, unyango oluqhelekileyo lokushisa kunzima ukutshintsha ukuhlukana kwe-carbide, echaphazela kakhulu iipropati ze-mechanical zentsimbi kunye nobomi benkonzo yokufa. Ubume kunye nobukhulu be-carbides nabo banempembelelo enkulu kwiipropati zetsimbi. Ngokukodwa, ii-carbides ezinkulu ezibukhali zinefuthe elikhulu lokuqhekeka kwi-matrix yensimbi kwaye zihlala zingumthombo wokuqhekeka kokukhathala. Ngoko ke, kuyimfuneko ukuguqula ukubunjwa kwentsimbi ekrwada, ukutyumza ngokupheleleyo i-eutectic carbides ukuze ihambe kakuhle kwaye isasazwe ngokulinganayo, kwaye isakhiwo sefayibha sisasazwa malunga nomngxuma okanye ngokungahambi kakuhle, ukuze kuphuculwe iipropati zentsimbi ezinqamlezayo. .
Ngethuba lokuqulunqa, i-billet iya kuphazamiseka kwaye itsalwe kwiindlela ezahlukeneyo ngamaxesha amaninzi, kwaye ifakwe ngeendlela "ezimbini zokukhanya kunye neyodwa enzima", oko kukuthi, i-billet iya kubetha ngokukhawuleza ekuqaleni kokukhwabanisa ukukhusela ukuphuka. Inokubetha kakhulu kwiqondo lokushisa eliphakathi kwe-980 ~ 1020 ℃ ukuqinisekisa ukutyunyuzwa kwee-carbides. Intsimbi ye-42CrMo ayibunjwanga, kwaye isisombululo esiluqilima sonyango oluphindwe kabini luyamkelwa, oko kukuthi, ukufudumeza okwesibini malunga ne-500 ℃ kunye ne-800 ℃ kunye nonyango lwesisombululo esiluqilima kwi-1100 ~ 1150 ℃, Ukucima ngeoli eshushu okanye ukucinywa kwe-isothermal, ukushisa okuphezulu kwi-750 ℃, ukufudumeza kwi-960 ℃ emva komatshini kunye nokunyanga kobushushu bokugqibela emva kokupholisa ioli kunokuphucula i-carbides, imiphetho engqukuva kunye neekona kunye nokucokisa iinkozo.
