Qib 10.9 bolts yog hom nrov ntawm lub taub hau hex ntsia hlau. Vim nws siab hardness, nws yog feem ntau siv nyob rau hauv daim ntaub ntawv xws li precision machinery thiab sib tsoo cov cuab yeej. Yog li dab tsi yog qhov nyuaj ntawm qib 10.9 bolts? Nyob rau hauv tsab xov xwm no, peb yuav ua ib qho kev ntsuam xyuas ntawm qhov nyuaj ntawm qib 10.9 bolts, vam tias yuav muab cov ntaub ntawv siv rau txhua tus.
Ua ntej, cia peb saib qhov hardness ntawm qib 10.9 bolts.
Raws li tus qauv, qhov nyuaj ntawm qib 10.9 bolts yuav tsum yog HV320-380 lossis HRC34-40. Hauv kev tsim khoom tiag tiag, cov tuam txhab tsim cov bolts hauv quenching roj rhuab mus rau 850 degrees rau 30 feeb. Tom qab quenching, bolts yuav tsum tempered rau 120 feeb. Cov txheej txheem no tseem ceeb heev rau kev tsim cov hardness xav tau.
Tom ntej no, cia peb saib tob dua ntawm cov txheej txheem ntawm qib 10.9 bolts.
Khoom siv tes ua 1
Rau cov txheej txheem 35CrMo, nws yuav tsum siv 40Cr cov khoom los ua bolts. Bolt txoj kab uas hla yog 22mm, ntev yog 114mm, rau tsheb log tsheb. Tom qab quenching thiab tempering, lub hardness yuav tsum yog HV320-380 lossis HRC{5}}, lub zog tensile yuav tsum yog 1040MPa, thiab cov qauv yuav tsum tempered sorbite.
Khoom siv tes ua 2
Test txheej txheem 1 txais kev kub forging thiab tom qab ntawd tshuab dhos ua. Kev kho cua sov yog nyob rau hauv ib lub mesh siv rauv. Qhov kub quenching hauv cov cheeb tsam 1-4 yog (860-870-870-860). Lub sijhawm quenching yog li 90 feeb. Cov roj quenching yog txias. Lub hardness tom qab quenching yog HRC49. -52; lub tempering kub nyob rau hauv ib cheeb tsam 1-3 yog 510, thiab lub hardness tom qab tempering yog HRC32-35. Txawm li cas los xij, cov txiaj ntsig tshuaj xyuas tau pom tias cov txheej txheem tsis tuaj yeem ua tau raws li qhov yuav tsum tau ua.
Hauv kev sim txheej txheem 2, annealing, phosphating, thiab txias extrusion tau ua. Kev kho cua sov yog nyob rau hauv ib lub mesh siv qhov cub. Qhov kub quenching hauv cov cheeb tsam 1-4 yog (860-870-870-860). Lub sijhawm quenching yog li 90 feeb. Cov roj quenching tau txias thiab quenched. Lub hardness tom qab tempering yog HRC49-52; ib cheeb tsam tempering kub 1-3 yog 480, lub hardness tom qab tempering yog HRC34-38, tensile zog yog 1005MPa, thiab muaj ib tug me me ntawm ferrite; lwm qhov kub thiab txias yog 1 Lub cheeb tsam -3 yog tag nrho 460, lub hardness tom qab tempering yog HRC 36-40, thiab lub zog tensile yog 960MPa. Tag nrho cov txheej txheem siv tag nrho kom zoo dua ntawm cov khoom siv thiab ua tiav qhov kev ua tau zoo.
Txhawm rau ua kom tiav, qhov nyuaj ntawm qib 10.9 bolts ntawm lub khw feem ntau yog HV320-380 lossis HRC34-40. Rau kev tsim cov qib 10.9 bolts, nws yuav tsum tau ua raws li kev rwb thaiv tsev ntawm 850 degrees rau 60 feeb, carbon peev xwm 0.45, isothermal graded quenching roj, roj kub 100 degrees, quenching lub sij hawm 30 feeb, tempering 480 degrees, 120 feeb . Tsis tas li ntawd, yog tias lub ntsia liaj qhov rooj tsim me me ntawm ferrite tom qab tempering, nws lub zog tensile tau txais.
