◦ Tus qauv siv: GB/T1222-2007.
◦ Qhov Ceev: 7.85 g/cm3.
• Cov tshuaj lom neeg muaj pes tsawg leeg
◦ Carbon (C): 0.62% ~ 0.70%, muab lub zog yooj yim thiab kev tawv.
◦ Manganese (Mn): 0.90% ~ 1.20%, txhim kho qhov tawv thiab txhim kho kev tawv.
◦ Silicon (Si): 0.17% ~ 0.37%, txhim kho kev ua haujlwm thiab kev ua kom cov nplej zoo dua.
◦ Phosphorus (P): ≤0.035%, sulfur (S) ≤0.035%, tswj cov ntsiab lus tsis huv.
◦ Chromium (Cr): ≤0.25%, nickel (Ni) ≤0.30%, tooj liab (Cu) ≤0.25%, cov khoom sib xyaw ua ke, pab txhim kho kev ua tau zoo.
• Cov khoom siv kho tshuab
◦ Lub zog siab: Lub zog tensile σb yog 825MPa ~ 925MPa, thiab qee cov ntaub ntawv siab dua 980MPa. Nws muaj peev xwm zoo heev thiab tsim nyog rau cov xwm txheej kev ntxhov siab siab.
◦ Zoo elasticity: Nws muaj qhov siab elastic txwv, tuaj yeem tiv taus qhov loj elastic deformation yam tsis muaj kev hloov pauv tas mus li, thiab tuaj yeem khaws cia thiab tso tawm lub zog.
◦ Kev nyuaj siab: Tom qab kev kho cua sov, nws tuaj yeem ncav cuag HRC50 lossis siab dua, nrog kev tiv thaiv kev hnav zoo, tsim nyog rau cov xwm txheej hnav.
◦ Kev tawv zoo: Thaum raug kev cuam tshuam, nws tuaj yeem nqus tau qee yam zog yam tsis muaj kev tawg, uas txhim kho kev ntseeg tau thiab kev pabcuam lub neej nyob rau hauv cov xwm txheej nyuaj.
• Cov yam ntxwv
◦ Kev tawv tawv siab: Manganese ua rau kev tawv tawv zoo dua, tsim nyog rau kev tsim cov caij nplooj ntoos hlav thiab cov khoom loj uas muaj txoj kab uas hla ntau dua 20 hli.
◦ Qhov tsis tshua muaj qhov decarburization ntawm qhov chaw: Qhov zoo ntawm qhov chaw ruaj khov thaum lub sijhawm kho cua sov, txo qhov kev pheej hmoo ntawm kev ua tsis tiav thaum ntxov.
◦ Kev kub dhau thiab kev kub hnyiab: Yuav tsum tswj qhov kub thiab txias kom nruj, thiab yuav tsum zam qhov kub thiab txias uas tawg thaum lub sijhawm kub hnyiab.
◦ Kev ua haujlwm zoo: tuaj yeem forged thiab welded, tsim nyog rau kev tsim cov khoom sib xyaw ua ke, tab sis qhov txias deformation plasticity qis.
• Cov lus qhia txog kev kho cua sov
◦ Kev Tua Hluav Taws: Kev tua hluav taws kub 830 ℃ ± 20 ℃, roj txias.
◦ Tempering: Tempering kub 540 ℃ ± 50 ℃, ± 30 ℃ thaum xav tau tshwj xeeb.
◦ Ua kom zoo li qub: Kub 810 ± 10 ℃, cua txias.
• Cov cheeb tsam thov
◦ Kev tsim khoom caij nplooj ntoos hlav: xws li cov nplooj ntoos hlav tsheb, cov caij nplooj ntoos hlav nqus dej, cov caij nplooj ntoos hlav valve, cov hlua khi, thiab lwm yam.
◦ Cov khoom siv kho tshuab: siv tau los tsim cov khoom siv thauj khoom siab, sib txhuam siab xws li cov iav, cov kabmob, thiab cov pistons.
◦ Cov cuab yeej txiav thiab stamping tuag: siv nws qhov siab hardness thiab hnav tsis kam, nws tuaj yeem siv los tsim cov cuab yeej txiav, stamping tuag, thiab lwm yam.
◦ Cov tsev thiab cov choj: siv tau los tsim cov khoom uas txhim kho lub peev xwm ntawm cov qauv, xws li cov choj bearings, cov kev txhawb nqa tsev, thiab lwm yam.
Lub sijhawm tshaj tawm: Lub Xya Hli-18-2025