40Cr4 Poob Wax Peev Casting

Khoom Taw Qhia

Cov hlau 40Cr4 yog dab tsi?

Medium carbon modulated steel (txias taub hau tuag steel) C{{0}}.37~0.44 Si0.17~0.37 Mn{{1 0}}.50~0.8{{20}} Cr0.80~1.10 Ni Tsawg dua los yog sib npaug rau 0.030 P Tsawg dua lossis sib npaug 0.035 S Tsawg dua lossis sib npaug rau 0.035 CU Tsawg dua lossis sib npaug rau 0.030

Dab tsi ntawm cov hlau yog 40Cr4-B, thiab qhov txawv ntawm nws thiab 40Cr yog dab tsi?

Ua ntej tshaj plaws, nws tsis yog "hluav taws", tab sis "quenching". Nyob rau hauv lub Hoobkas, nyob rau hauv thiaj li yuav tsis txhob totaub nrog "annealing", nws kuj yog hu ua "dipping nyob rau hauv hluav taws".

Thib ob: Tus qauv hais ntawm 45 steel yuav tsum hu ua "45 steel", tsis yog 45 steel. Cov ntsiab lus carbon ntawm 40Cr yog 0.37% ~ 0.44%, uas yog me ntsis qis dua 45 steel (0.42% ~ {{13} }}.50%). Cov ntsiab lus ntawm Si thiab Mn yog sib npaug, thiab cov ntsiab lus ntawm Cr yog 0.80% ~ 1 .10%. Nyob rau hauv cov ntaub ntawv ntawm cov khoom kub-kuav los tiag, qhov no 1% Cr muaj qhov pib tsis muaj txiaj ntsig, thiab lawv cov khoom siv hluav taws xob zoo ib yam. Txij li thaum 40Cr yog ib nrab kim tshaj li 45 steel, vim nyiaj txiag, cov neeg uas siv tau 45 steel tsis siv 40Cr. Feem ntau cais 45 steel belongs rau GB699 "(High Quality) Carbon Structural Steel", thiab 40Cr belongs rau GB3077 "Alloy Structural Steel". Qhov txawv yog nyob rau hauv kev kho cua sov. Lub luag haujlwm tseem ceeb ntawm Cr hauv kev kho cua sov yog los txhim kho lub hardenability ntawm steel. Vim muaj zog hardenability, lub zog, hardness, cuam tshuam toughness thiab lwm yam mechanical zog ntawm 40Cr tom qab quenching (los yog quenching thiab tempering) kuj ho siab dua li ntawm 45 steel. Txawm li cas los xij, vim muaj zog hardenability, qhov kev ntxhov siab sab hauv ntawm 40Cr thaum lub sij hawm quenching kuj qis dua li ntawm 45 steel. 45 steel yog loj dua. Raws li cov xwm txheej zoo ib yam, kev sib tsoo ntawm cov khoom ua haujlwm ntawm 40Cr cov khoom yog ntau dua li ntawm cov khoom ua los ntawm 45 steel khoom. Yog li ntawd, txhawm rau kom tsis txhob tawg ntawm lub workpiece, cov roj uas tsis muaj thermal conductivity feem ntau yog siv los ua qhov nruab nrab quenching thaum quenching 40Cr (qee zaum ob txoj kev ua kua quenching kuj siv, feem ntau hu ua dej quenching thiab roj txias), thaum dej. nrog ntau dua thermal conductivity yog siv los ua qhov nruab nrab quenching rau 45 Cr. nruab nrab. Tau kawg, kev xaiv dej thiab roj tsis yog qhov tseeb, thiab tseem muaj feem xyuam nrog cov duab ntawm lub workpiece. 40Cr qhov chaw nrog cov duab yooj yim kuj tuaj yeem quenched nrog dej, thaum 45 steel qhov chaw nrog cov duab nyuaj yuav tau siv roj quenching lossis txawm da dej ntsev.

Cov tshuaj muaj pes tsawg leeg thiab tensile lub zog ntawm 40Cr yog dab tsi thiab nws tsim nyog rau dab tsi?

Tshuaj muaj pes tsawg leeg ntawm 40Cr: C0.37 ~ 0.44%\

Si {{0}}.17 ~ 0.37%\

Mn{{0}}.50~0.80%\Cr0.80~1.10% Cov khoom siv tshuab: tensile zog 590 ~ 735N / mm2. quenching thiab tempering kev kho mob tuaj yeem tau txais cov khoom zoo txhua yam, tsis tshua muaj kev kub ntxhov, thiab zoo hardenability. Roj quenching tuaj yeem txhim kho qaug zog. Thaum lub sij hawm dej quenching, qhov chaw uas muaj cov duab complex yog nquag ua ke. Txias bending plasticity yog nruab nrab. Tom qab kev kho cua sov, qhov kev ua tau zoo yog qhov zoo thiab qhov weldability zoo. Tsis zoo. Feem ntau siv nyob rau hauv lub xeev quenched thiab tempered, nws kuj yuav carbonitrided thiab high-frequency quenched. Nws yog ib qho ntawm feem ntau siv alloy structural steels. Tom qab quenching thiab tempering, nws tuaj yeem siv los tsim cov khoom nruab nrab-ceev thiab nruab nrab-load qhov chaw, xws li cov cuab yeej siv tshuab, shafts, worms, spline shafts, ejector tes tsho, thiab lwm yam.;

Quenching thiab tempering thiab nto high-frequency quenching yog siv los tsim cov khoom uas muaj qhov tawv tawv thiab hnav tsis kam, xws li lub zog, ncej, spindles, crankshafts, spindle tes tsho, pins, txuas rods, intake valves, screws, thiab lwm yam. nruab nrab kub tempering Hluav taws yog siv los tsim hnyav-load, nruab nrab-ceev cuam tshuam qhov chaw, xws li roj twj rotors, sliders, zog, spindle tes tsho, thiab lwm yam .; quenching thiab low-temperature tempering yog siv los tsim cov khoom hnyav, tsis tshua muaj kev cuam tshuam, hnav-tiv taus qhov chaw, xws li cua nab thiab shafts. , sets, thiab lwm yam;

Kev kho cov pa roj carbon-nitrogen yog siv los tsim cov khoom sib kis nrog qhov loj dua thiab siab dua qhov kub thiab txias, xws li cov ncej, lub zog, thiab lwm yam.; steels uas tuaj yeem siv los hloov 40Cr suav nrog 40MnB, 45MnB, 35SiMn, 42SiMn, thiab lwm yam.

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