20CrMnMo izinsimbi eziyindilinga ezishisayo ezigoqiwe

Ukusebenza okuhle kokushisa okushisayo, okujwayelekile ngemuva kokusika okuhle, ngemuva kokucisha nokushisa ngezakhiwo ezinhle zemishini kanye nokuqina komthelela ophansi wokushisa, ngemuva kokuba i-carburizing ibe namandla aphezulu okuguquguquka nokumelana nokugqoka, kepha i-weldability embi, ukufudumala kahle ngaphambi kokushisela, ngemuva kokushisela kufanele. ulaka. Okuvame ukusetshenziswa ezidingweni zokukhiqiza ubulukhuni obuphezulu, ukumelana okuhle kokugqoka kubalulekile izingxenye ze-carburizing, njengamagiya, induku ye-camshafts,

Ukwakhiwa Kwekhemikhali:
Ikhabhoni C: 0.17 ~ 0.23
ISi Si: 1.17 ~ 1.37
Mn Mn: 0.90 ~ 1.20
I-Sulfur S: ukuvumela okuqukethwe okusele ≤0.035
I-Phosphorus P: ukuvumela okuqukethwe okuyinsalela ≤0.035
I-Chromium Cr: 1.10 ~ 1.40
Ni: ukuvumela okuqukethwe okuyinsalela ≤0.030
Cu: ukuvumela okuqukethwe okuyinsalela ≤0.030
Mo Mo: 0.20 ~ 0.30
Izici zikaMechanical:
Amandla e-Tensile σb (MPa): ≥1175 (120)
Amandla esivuno σs (MPa): ≥885 (90)
Ubude δ5 (%): ≥10
Ukwehliswa kwe-ψ (%): ≥45
Impact energy Akv (J): ≥55
Ukuqina komthelela αkv (J / cm2): ≥69 (7)
Ukuqina: ≤217HB
Usayizi wesampula: Usayizi wesampula ungu-15mm rough
Ukwelashwa kokushisa kanye nokucaciswa kwe-microstructure:
Ukucaciswa kokwelashwa kokushisa: ukucisha i-850 ℃, ukupholisa uwoyela; ukushisa okungu-200 ℃, kupholiswe ngamanzi, kupholiswe umoya.
I-Microstructure: i-martensite epholile.
Isimo sokudiliva: ekwelashweni kokushisa (okujwayelekile, ukuthulisa noma ukuthulisa) noma ngaphandle kokulethwa kokwelashwa kokushisa, isimo sokulethwa kufanele sicaciswe kunkontileka.