TS EN 10297-1 yog European tus qauv rau kub-Tiav seamless steel raj rau kev siv tshuab thiab kev tsim vaj tsev dav dav. 42CrMo4, qhov dav tshaj plaws chromium-molybdenum qib nyob rau hauv tus qauv no, muab kev sib xyaw ua ke ntawm lub zog siab, hardenability thiab toughness uas ua rau nws yog qhov kev xaiv zoo tshaj plaws rau cov khoom siv mills thiab shafts. Tsab ntawv xov xwm no qhia txog chemistry, txhua yam khoom siv, kev kho cua sov thiab kev sim ntsuas ntawm 42CrMo4 raj rau EN 10297-1.
Tshuaj muaj pes tsawg leeg
42CrMo4 yog quenched-thiab-tempered chromium-molybdenum steel. Qhov sib ntxiv ntawm molybdenum txhim kho hardenability thiab siab - qhov kub thiab txias, thaum chromium muab los ntawm - hardening thiab hnav tsis kam. Kev txwv tsis pub muaj nyob hauv EN 10297-1 yog muab rau hauv cov lus hauv qab no.
| Lub ntsiab | C | Si | Mn | P max | S max | Cr | Mo |
|---|---|---|---|---|---|---|---|
| Cov ntsiab lus (wt%) | 0.38-0.45 | 0.40 max | 0.60-0.90 | 0.025 | 0.035 | 0.90-1.20 | 0.15-0.30 |
Mechanical Properties Tom qab quenching thiab Tempering
42CrMo4 cov hlab yog muab rau hauv qhov kub thiab txias (+ QT) tshwj tsis yog lwm yam kev pom zoo. Yam khoom muaj txiaj ntsig zoo rau cov phab ntsa me me yog teev hauv qab no; qhov tseeb qhov tseem ceeb rau qhov loj me yog muab los ntawm tus qauv lub rooj los ntawm phab ntsa thickness pawg.
| Khoom | Tus nqi |
|---|---|
| Tensile zog Rm | 900-1100 MPa |
| Yield zog Rp0.2 | 700 MPa min |
| Elongation A | 12% min (ntev) |
| Impact zog KV | 27 J min ntawm chav tsev kub, raws li kev pom zoo kuaj |
| Hardness (ntau raws li muab) | 260-320 HBW nyob ntawm tus mob |
Hardenability raug txheeb xyuas los ntawm Jominy kawg -quench test per ISO 642; 42CrMo4 ua tiav qhov tob tob txog 25 hli ntawm 50 HRC raws li cov qauv kev sim, uas yog vim li cas nws thiaj li raug xaiv rau cov khoom uas yuav tsum tau hardened tom qab machining.
Kev tsim khoom thiab kev kho cua sov
42CrMo4 raj rau EN 10297-1 yog tsim los ntawm kub dov los yog kub extrusion ntawm dov los yog forged billets, ces kub kho. Cov txheej txheem kev kho cua sov yog quench hardening ntawm 850-880 C ua raws li tempering ntawm 550-650 C. Tempering kub tswj qhov kawg hardness thiab toughness pauv tawm: qis tempering kub muab siab dua hardness, siab tempering muab zoo toughness. Rau cov ntawv thov uas xav tau kev nruj dua qhov tseeb, cov hlab tuaj yeem ua tiav ntxiv los ntawm kev kos duab txias lossis kev ua kom zoo.
Dimensional Tolerances
Qhov ntev thiab kam rau ua raws li EN 10297-1. Rau cov kub- tiav cov raj sab nraud ntawm txoj kab uas hla sab nraud yog ib txwm hais txog ntxiv 1% mus rau rho tawm 0.5% nyob ntawm pawg loj, thiab phab ntsa thickness kam rau ua yog txog ntxiv 12.5% rau rho tawm 10% tshwj tsis yog cov chav kawm nruj dua tau pom zoo. Qhov twg yuav tsum tau ua kom raug, txias-daws 42CrMo4 tuaj yeem muab tau rau ntau qhov nruj dua, feem ntau ntxiv rau 0.05 txog 0.10 hli rau sab nraud. Cov chav kawm pom zoo kam rau ua yuav tsum tau teev nyob rau hauv qhov kev txiav txim.
Daim ntawv thov thiab kev txwv
Kev siv cov 42CrMo4 seamless raj muaj xws li oilfield laum dab tshos thiab subs, submarine thiab offshore Cheebtsam, aircraft tsaws iav qhov chaw hardened mus rau 45-50 HRC, hnyav- lub luag hauj lwm shafts, pinions, hydraulic kheej kheej thiab xovxwm Cheebtsam. Qib tsis yog npaj rau kev pabcuam siab tshaj li 600 C, qhov twg chromium-molybdenum carbides pib coarsen thiab txo qis zog, thiab vuam yuav tsum tau ua raws li tom qab-weld kho cua sov ntawm 600-650 C kom rov qab kho cov khoom siv hluav taws xob ntawm thaj chaw muaj kev kub ntxhov.
Quality Validation thiab Certification
Kev ntsuas tensile rau EN ISO 6892-1 ntawm txhua qhov kub thiab txias
Kev ntsuam xyuas cuam tshuam rau ISO 148-1 qhov kev xav tau cuam tshuam
Kev sim hardness thiab, qhov twg teev, Jominy hardenability ib ISO 642
100% ultrasonic kuaj rau EN ISO 10893-11 rau kev pabcuam tseem ceeb, lossis raws li kev pom zoo lees paub
Magnetic particle soj ntsuam raws li ISO 10893-8 rau kev txheeb xyuas qhov chaw
Daim ntawv pov thawj rau EN 10204 3.1 raws li tus qauv, 3.2 nrog lub koom haum soj ntsuam ywj pheej
FAQ
42CrMo4 txhais li cas?
Raws li EN 10027-2, 42CrMo4 tsim cov hlau nrog 0.42% txhais tau tias cov ntsiab lus carbon, chromium thiab molybdenum ua cov ntsiab lus tseem ceeb nrog 1% txhais tau tias chromium, thiab molybdenum cov ntsiab lus nyob ib ncig ntawm 0.25%. Cov npe hu ua pawg nws nyob rau hauv quenched -thiab-tempered alloy steel tsev neeg.
Lub zog tawm ntawm 42CrMo4 nyob rau hauv qhov kub thiab txias yog dab tsi?
Raws li EN 10297-1, qhov tsawg kawg nkaus yield zog Rp0.2 yog 700 MPa rau lub + QT mob, nrog tensile zog 900-1100 MPa thiab yam tsawg kawg nkaus elongation 12% rau me me phab ntsa thicknesses.
Puas yog 42CrMo4 muab seamless lossis welded?
TS EN 10297-1 npog kub- cov raj seamless nkaus xwb, yog li 42CrMo4 rau tus qauv no yeej ib txwm seamless. Nws tuaj yeem muab tau kub- dov, kub-extruded, lossis ntxiv txias-draw rau cov ntawv thov raug.
42CrMo4 raj puas tuaj yeem welded?
Yog lawm, nrog kev ceev faj: cov hlau yuav tsum tau preheated thiab welded nrog qhov sib piv qis -hydrogen txheej txheem, thiab tom qab-weld kev kho cua sov ntawm 600-}650 C yog yuav tsum tau los kho hardness thiab toughness. Vuam yam tsis muaj PWHT tawm ib qho nyuaj, tawg -rooj cua kub-tshem tawm tsam.
Qhov kev pabcuam siab tshaj plaws rau 42CrMo4 yog dab tsi?
Qib yog tsim los rau cov khoom siv kho tshuab ntau dua li siab - qhov kev pabcuam kub. Tshaj li ntawm 600 C, carbide coarsening txo lub zog thiab nkag siab, yog li lwm yam Cr-Mo tshav kub- qib resistant yuav tsum raug xaiv rau lub luag haujlwm.
Yuav tsum xeem dab tsi rau 42CrMo4 raj rau EN 10297-1?
Kev xeem yuav tsum muaj xws li tshuaj ntsuam xyuas, ntsuas tensile, thiab qhov twg yuav tsum tau los ntawm qhov kev txiav txim, kev cuam tshuam thiab kev sim hardness. Cov kev xav tau ntxiv tuaj yeem ntxiv kev kuaj ultrasonic rau EN ISO 10893-11, kev tshuaj xyuas cov khoom sib nqus ntawm ISO 10893-8 thiab ntawv pov thawj rau EN 10204 3.1 lossis 3.2.
