Spot kutengesa kwe40Cr simbi pombi yekugadzirisa
40Cr simbi pombi imhando yesimbi yakatenderedzwa ine mhango chikamu uye isina majoini akatenderedza. Yakagadzirwa nepombi yakasimba isina chinhu kuburikidza nekuboora, uyezve yakagadzirwa nekupisa kukunguruka, kutonhora kukunguruka kana kutonhora kudhirowa. Kuenzaniswa nesimbi yakatenderedzwa uye imwe simbi yakasimba, kana kukotama uye torsional simba rakafanana, uremu hwepombi yesimbi yakareruka, inova rudzi rwehupfumi chikamu simbi.
Maererano GB / T 3077-2008: kemikari kuumbwa (hwanda chikamu,%) C 0.37 ~ 0.44, Si 0.17 ~ 0.37, Mn 0.50 ~ 0.80, cr0.80 ~ 1.10, Ni ≤ 0.30【 Mechanical properties]
Saizi isina chinhu (mm): 25
Kupisa kwekushisa kwekutanga kudzima (℃): 850; Inotonhorera: Mafuta
Chechipiri kudzima tembiricha yekudziya (℃):-
Kupisa kupisa tembiricha (℃): 520; Inotonhorera: mvura, mafuta
Kusimba kwesimba (σ b/MPa): ≧980
Goho (σ s/MPa): ≧785
Kureba mushure mekutsemuka (δ 5/%): ≧9
Kuderedzwa kwenzvimbo (ψ/%): ≧45
Impact absorption simba (aku2 / J): ≥ 47
Brinell kuoma (hbs100 / 3000) (yakanyungudutswa kana yakakwirira tembiricha yakadzikama): ≤ 207
The standard simbi mamakisi GB muChina 40Cr, DIN zvinhu No. 1.17035 / 1.7045, DIN 41Cr4 / 42gr4, en 18, BS 41Cr4, AFNOR 42c4, NF 38cr4 / 41Cr4, uni 2 SAS 2, SA 2, Unic 2, SA 4, SA 4, SA 4, SA 4, SA 4, SA 4, SA 4 NISI 4, 4 SS N42Cr 4, 4 SS N 2, 4 NISI 4, 4 NISI, 4 NISI, 4 NISI. / ASTM Standard Steel No. 5140, Japanese JIS standard steel No. scr440 (H) / scr440, American AISI / SAE / ASTM Standard Steel No.
(inenge) ACM = 780 ℃
Tembiricha 850 ~ 870 ℃, kuoma 179 ~ 229hbs.
Iyo tembiricha ndeye 740 ~ 760 ℃, nguva yekubata i4 ~ 6h, uyezve tembiricha inotonhorera kusvika ≤ 600 ℃ pakutonhora kwe5 ~ 10 ℃ / h.
Kuoma kusati kwaitwa ≤ 217hbs, kuoma mushure mekunyorova ≤ 163hbs.
(670±10)℃ × 2H, tembiricha inokwira nechoto, (710 ± 10) ℃ × 2H, tonhorera pasi nechoto, (670 ± 10) ℃ × 2H, tembiricha inokwira nechoto, (710 ± 10) ℃ × 2H, wozodzikisa tembiricha nechoto, (670 ± 10) ℃ × 2H, tembiricha inokwira nechoto, (710 ± 10) ℃ × 2H, tonhorera pasi nechoto kwe3, uye wozotonhorera pasi kusvika 550 ℃ yekutonhodza mweya. Kuoma mushure mekurapa ndeye 153hbs.
Kudzima tembiricha 850 ℃± 10 ℃, kutonhora kwemafuta; Kupisa tembiricha 520 ℃± 10 ℃, mvura, mafuta uye kutonhora kwemhepo.
Medium carbon modulated simbi, inotonhora musoro die simbi. Simbi ine mwero mutengo uye nyore kugadzirisa. Mushure mekurapa kwakakodzera kupisa, inogona kuwana kumwe kuoma, plastiki uye kupfeka kuramba. Normalizing inogona kusimudzira tishu spheroidization uye kunatsiridza kucheka mashandiro ema blanks nekuoma kuri pasi pe160hbs. Yakapfava pa550 ~ 570 ℃, simbi yacho ine yakanakisa yakazara ma mechanical zvivakwa. Kuoma kwesimbi iyi kwakakwirira kudarika ye45 simbi. Inokodzera kurapwa kwekuomesera kwepamusoro senge yakakwira frequency quenching uye kudzima murazvo.
Mushure mekudzima uye kudziya, simbi iyi inoshandiswa kugadzira michina inotakura mitoro yepakati uye yepakati kumhanya, senge chidhiraivho chekufambisa, kumashure hafu shaft yemotokari, giya, shaft, worm, spline shaft, pakati sleeve, nezvimwe pamuchina mudziyo; Mushure mekudzima uye yepakati tembiricha kudzikama, inoshandiswa kugadzira zvikamu zvinotakura mutoro wakakwira, kukanganisa uye kumhanya kwepakati, senge giya, main shaft, mafuta pombi rotor, inotsvedza block, collar, nezvimwe; Mushure mekudzima uye kudzika-kupisa kupisa, inoshandiswa kugadzira zvikamu zvine mutoro unorema, kuderera kwesimba, kupfeka kusagadzikana uye kusimba kwakasimba kusingasviki 25mm pane chikamu, sehonye, main shaft, shaft, collar, nezvimwe; Mushure mekudzima uye kudziya uye kudzima kwepamusoro-soro kudzima, inoshandiswa kugadzira zvikamu zvine kuomarara kwepamusoro uye kupfeka kusagadzikana pasina kukanganiswa kukuru, senge giya, sleeve, shaft, main shaft, crankshaft, spindle, pini, yekubatanidza tsvimbo, screw, nut, inlet valve, etc. Mukuwedzera, iyi simbi yakakodzerawo kugadzira zvikamu zvakasiyana-siyana zvekutumira zvakabatwa ne carbonitriding, zvakadai semagiya uye shafts ane dhayamita yakakura uye yakanaka yakaderera tembiricha kuoma.
Yakavharwa, kuoma ≤ 207hbs. 40Cr elastic modulus: elastic modulus E (20 ℃) / MPA 200000 ~ 211700, shear modulus G (20 ℃) 80800
Kudzima maitiro e40Cr
40Cr kudzima, 850 ℃, kutonhora kwemafuta; Kupisa 520 ℃, kutonhora kwemvura, kutonhora kwemafuta. Iyo yepamusoro inodzima kuoma kwe40Cr simbi pombi iri hrc52-60, uye murazvo unodzima unogona kusvika hrc48-55.
40Cr nitriding kurapwa
40Cr ndeye nitrided simbi, uye zvinhu zvayo zvinobatsira kune nitriding. 40Cr inogona kuwana kuomarara kwepamusoro mushure mekurapa nitriding, uye kuoma kwepamusoro mushure mekurapa nitriding kunogona kusvika hra72 ~ 78, kureva hrc43 ~ 55. kugaya. Nekuti iyo nitrided layer yakatetepa uye ine brittle, inodiwa kuve neyakasimba-yakasimba musimboti chimiro, saka zvinodikanwa kuita kudzimisa uye kupisa kupisa kurapwa kutanga kuwana hasha sorbite uye kunatsiridza mashandiro emuchina wepakati uye kunaka kwe. iyo nitrided layer. Soft nitriding inoshanda nitriding, uye gasi nitriding inowanzoshandiswa
40Cr welding
Pamberi pe40Cr welding, teerera kune preheating kudzivirira kudzima mutswe mukati meweld nekuda kwekupisa kwe matrix. Zvakanakisa kuita normalize usati welding.
Weldability ye40Cr: zviri nyore kupatsanura panguva yekristalllization uye inonzwa kune crystallization crack (rudzi rwekupisa kwekupisa). Zviri nyore kutsemuka mugomba uye concave chikamu muweld panguva yewelding. Iine yakakwira kabhoni yemukati, zviri nyore kuwana yakaomeswa chimiro (martensite) iyo inonzwa zvakanyanya kune inotonhora makatsemuka panguva yekutonhora nekukurumidza. Kana mwero wekutonhora wenzvimbo inopisa zvakanyanya, zviri nyore kuumba yakaoma uye brittle yakakwirira kabhoni martensite uye imbrittle iyo yakanyanya kupisa nzvimbo.
1. Welding inowanzoitwa mune annealed (yakajairika) mamiriro.
2. Iyo welding nzira haina kuganhurirwa
3.Iyo preheating tembiricha inogona kukwidziridzwa zvakakodzera nesimba rakakura remutsetse. Kazhinji, tembiricha yekupisa uye tembiricha yepakati inogona kudzorwa pakati pe250 ~ 300 ℃.
4. Iyo welding zvinhu ichaona kuti kuumbwa kwesimbi yakaiswa kwakafanana neiyo ye base simbi, senge j107-cr.
5.Kudzima uye kupisa kupisa kurapwa kuchaitwa munguva mushure mekugadzira. Kana zvakaoma kuita quenching uye tempering kurapwa nenguva, pakati annealing kana kubata pane tembiricha yakakwira kupfuura preheating kwenguva yakati inogona kuitwa kubvisa diffused hydrogen uye kupfavisa chimiro. Kune zvigadzirwa zvine chimiro chakaomarara uye akawanda welds, yepakati annealing inogona kuitwa mushure mekubatanidza imwe nhamba yewelds.
