Kev Tshawb Fawb Txog Kev Nyuaj Siab Ntawm Qib 10.9 Bolts

Cov10.9 qib boltyog ib tug nrov tiaj taub hau hexagonal 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? Hauv tsab xov xwm no, peb yuav txheeb xyuas qhov nyuaj ntawm qib 10.9 bolts, vam tias yuav muab 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. Nyob rau hauv qhov tseeb ntau lawm, cov chaw tsim tshuaj paus immerses lub bolts nyob rau hauv quenching roj rhuab mus rau 850 degrees Celsius 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 delve tob rau hauv cov txheej txheem ntawm 10.9 qib bolts.

Txheej txheem 1

Rau cov txheej txheem 35CrMo, nws yuav tsum siv 40Cr khoom los ua bolts. Covntsia liaj qhov roojmuaj txoj kab uas hla ntawm 22mm thiab ntev ntawm 114mm, siv rau cov log tsheb. Tom qab quenching thiab tempering, lub hardness yuav tsum yog HV320-380 lossis HRC34-40, lub zog tensile yuav tsum yog 1040MPa, thiab microstructure yuav tsum tempered nrog sorbite.

Txheej txheem 2

Cov txheej txheem kuaj 1 txais kev kub forging ua raws li machining, thiab kev kho cua sov yog nqa tawm hauv lub tshuab siv mesh. Lub quenching kub hauv cheeb tsam 1-4 yog (860-870-870-860), thiab lub sij hawm quenching yog li ntawm 90 feeb. Cov roj quenching yog siv los ua kom txias, thiab qhov hardness tom qab quenching yog HRC 49-52; Qhov kub ntawm qhov kub ntawm 1-3 yog 510, thiab qhov hardness tom qab tempering yog HRC 32-35. Txawm li cas los xij, cov txiaj ntsig kev tshuaj xyuas qhia tau tias cov txheej txheem tsis tuaj yeem ua tau raws li qhov yuav tsum tau ua.

Test txheej txheem 2 underwent annealing, phosphating, thiab txias extrusion forming. Kev kho cua sov tau ua nyob rau hauv ib lub mesh siv rauv, nrog quenching kub xws li ntawm 860-870-870-860 nyob rau hauv ib cheeb tsam 1-4. Lub sijhawm quenching yog li 90 feeb, thiab cov roj quenching yog siv los ua kom txias. Lub hardness tom qab quenching yog HRC49-52; Tempering kub ntau ntawm 480 nyob rau hauv 1-3 aav, nrog ib tug hardness ntawm HRC 34-38 thiab ib tug tensile zog ntawm 1005MPa tom qab tempering, raws li zoo raws li ib tug me me ntawm ferrite; Lwm hom tempering kub yog li ntawm 1 txog 3, nrog lub hardness ntawm HRC 36-40 thiab lub zog tensile ntawm 960MPa tom qab tempering. Tag nrho cov txheej txheem tau siv tag nrho cov khoom siv thiab ua tiav qhov kev ua tau zoo.

Hauv cov ntsiab lus, qhov nyuaj ntawm 10.9 qib bolts ntawm lub khw feem ntau yog HV320-380 lossis HRC34-40. Rau kev tsim ntawm 10.9 qib bolts, nws yuav tsum tau ua raws li kev tuav ntawm 850 degrees Celsius rau 60 feeb, carbon peev xwm ntawm 0.45, isothermal graded quenching roj, roj kub ntawm 100 degrees Celsius, quenching lub sij hawm ntawm 30 feeb, tempering Ci ntawm 480 ° C, thiab 120 feeb. Tsis tas li ntawd, yog tias me me ntawm ferrite yog tsim nyob rau hauv lub ntsia liaj qhov rooj tom qab tempering, nws lub zog tensile kuj tau txais.