1. Dab tsi yog Aisi 4130 chromoly hlau, thiab dab tsi yog cov yam ntxwv txhais ntawm nws daim ntawv tiaj tus?
AISI 4130 yog chromium - molybdenum tsawg {}} all ້ນ} nkauj hlau, feem ntau yog hu ua "chromoly." Nws yog koob meej rau nws cov zog zoo - {{5} kov txoj kev nyab xeeb, muaj zog heev, thiab weldability. Qhov "Chromo" yog hais txog nws cov ntsiab lus chromium (uas txhim kho kev txhim kho ntawm corrosatures thiab muaj kev pheej hmoo ntawm cov kev pheej hmoo siab ntawm kev npau taws).
Lub tiaj daim ntawv sau ua ke muab ntau yam, cov qauv duab nrog cov ntoo khaub ncaws plaub {}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}} seem. Qhov no ua rau nws muaj cov khoom siv raw rau ntau yam ntawm cov hluav taws xob uas muaj kev sib xyaw ua ke ntawm cov tiaj tiaj thiab lub zog siab yog qhov yuav tsum tau ua. Cov yam ntxwv tseem ceeb ntawm 4130 pob zeb tiaj tiaj li:
Lub zog siab: nws muaj kev muaj ntau dua cov txiaj ntsig zoo thiab tensile muaj zog dua li A36, txawm tias nyob rau hauv nws qhov qub lossis anealed mob.
Dev zoo thiab tawv: Thaum zoo cua sov - nrhiav tau zoo thiab poob siab {1} bading daim ntaub ntawv.
Cov khoom muaj zog: cov khoom siv alloying tso cai rau nws los ntawm {0} {tawv} Harden ntau yam tsis zoo thoob plaws tus ntoo khaub lig- seem ntawm ib qho chaw tiaj.
Lub tiaj tiaj li feem ntau muab rau hauv ib qho anealed los yog cov kev mob qub, uas muaj qhov zoo kawg nkaus siv rau ib feem ua tiav kom ua tiav cov khoom xav tau.
2. Hauv kev siv tshwj xeeb yog 4130 chromoly tiaj tus bar Qhov kev xaiv xaiv uas nyiam dua lwm cov ntaub ntawv xws li 1018 steel lossis 4140?
Kev xaiv ntawm 4130 lub tiaj tiaj li tsav los ntawm qhov xav tau rau lub zog zoo dua, thiab kev nkees} Cov hlau me me thiab siab dua {3} {muaj zog alloys.
Cov ntawv thov tseem ceeb muaj xws li:
Aerospace thiab aviation: Qhov no yog thawj daim ntawv thov hauv tuam tsev {} Nws lub zog siab tso cai rau kev tsim khaub ncaws hnav, uas yog qhov tseem ceeb hauv kev tsim khoom lag luam aerospace.
High - Kev ua haujlwm Automotive thiab sib tw:
Dov tawb thiab chassis Cheebtsam: Cov kab tuav khi no yog siv rau mounting daim hlau, gussets, thiab qhov cuab lub zog nkhaus hauv ib qho chaw thav duab chassis.
Kev ncua kev sib txuas thiab cov nkhaus: nws lub zog nkees ua rau nws zoo tagnrho rau cov khoom sib xyaw ua ke.
Cov thav duab thav duab (siab -}}} xaus): 1130 ca bar tuaj yeem siv rau qhov tseem ceeb ntawm cov txheej txheem tseem ceeb ntawm high- kev ua haujlwm ntas.
Tooling thiab Fixtures: siv rau jigs, consttures, thiab tuag teeb uas yuav muaj zog ntau dua 1018 steel tab sis qhov twg tag nrho cov tawv nqaij tawv ntawm 4140 tsis tsim nyog. Nws qhov zoo weldability yog qhov muaj txiaj ntsig tseem ceeb ntawm no.
Cov Machinery: Rau cov ntaub qhwv, pins, thiab cov zog uas yuav ua kom cua sov {} {{{{free {reawant nto thiab ib tug cwj pwm nyuaj.
Piv:
vs . 1018} Hlau: 4130 yog xaiv thaum lub zog ntawm 1018 tsis txaus ntseeg 50% muaj cua sov {{5}- kho kom ntau dua. Kev lag luam - tawm yog tus nqi siab dua thiab cov vuam me ntsis ntau dua.
VS . 4140} hlau: 4140 muaj ntau dua cov ntsiab lus nyuaj thiab muaj zog}?
3. Dab tsi yog qhov sib txawv kev kho mob rau 4130 pob zeb ncaj, thiab lawv cuam tshuam li cas nws cov machinability thiab kev ua haujlwm?
Kev kho cua sov yog tus yuam sij rau kev hloov lub peev xwm ntawm 4130 pob zeb ncaj. Tus mob nws yog nyob rau hauv lub sijhawm fabrication versus nws lub xeev kawg hauv kev pabcuam yog qhov kev txiav txim siab tseem ceeb.
Annealed mob:
Txheej txheem: rhuab thiab maj mam txias los tsim cov qauv muag, coarse hlaws qauv.
Hardness: ~ 145-190 HB. Nov yog lub xeev mos.
Luam ntaub: zoo heev. Qhov no yog qhov kev mob uas nyiam dua rau cov haujlwm hnyav lossis ua haujlwm nyuaj.
Kev Siv Thaum Kawg: Cheebtsam yog machined hauv lub xeev mos no thiab tom qab ntawd yauv ua kom sov kawg (harterening thiab tempering) kom ua tiav lub zog.
Qub Qub:
Txheej txheem: rhuab saum toj nws qhov tseem ceeb kub thiab cua - txias. Qhov no ua kom pom cov qoob loo grain rau ntau cov khaub ncaws hnav thiab txhim kho cov khoom siv neeg kho tshuab.
Hardness: ~ 200 HB.
Luam ntawv: zoo. Nws muaj kev sib npaug ntawm kev yooj yim machining thiab txhim kho cov khoom lag luam hauv qab.
Kev siv zaum kawg: feem ntau siv los ua kev kho zaum zaum kawg uas yuav tsum muaj lub zog zoo thiab kev ua kom muaj kev ua kom puv thiab tempering. Nws tseem yog ib qho kev pib pib rau kev kho cua sov ntxiv.
Quenched thiab tempered (Q & T) mob:
Txheej txheem: rhuab thiab sai quenched nyob rau hauv cov roj los ua ib qho nyuaj, ces temperitic qauv, ces temperitive ntawm qhov ntsuas kub thiab ua tiav lub zog (tawv tshuav.
Hardness: tuaj yeem raug txiav tawm ntawm ~ 25 teev rau 40+ hrc raws li qhov ntsuas kub.
Machinability: tsis zoo rau ncaj ncees. Machining yuav tsum tau txua cov cuab yeej tsim nyog (carbide) thiab feem ntau zam yog tias ua tau. Cov txiaj ntsig yog ib feem yog nyob rau hauv nws kawg, siab- lub xeev lub zog.
Kev siv zaum kawg: rau siab - Kev ntxhov siab cov dav hlau zoo li cov dav hlau tsaws iav, siab}} Kev ua tiav kev ncua tawm, thiab cov ntawv tseem ceeb.
Ntsiab lus: Rau cov fabrication, annealed, annealed lossis nonalized 4130 pav ca bar yog qhov zoo rau kev machining thiab vuam. Cov khoom tivthaiv yog ces cua sov -} nrhiav rau nws qhov kawg q & t mob kom ua tiav cov kev pabcuam xav tau.
4. Dab tsi yog cov lus qhia tseem ceeb rau kev ua tiav vuam 4130 chromoly tiaj li bar?
Thaum 4130 yog paub rau nws qhov zoo weldability piv rau lwm cov txheej txheem alloy, nws yuav tsum tau nruj txheej txheem kom tsis txhob tawg thiab khaws cia nws cov khoom siv neeg kho tshuab.
Cov lus qhia tseem ceeb muaj xws li:
Pre6 - cua sov -: rau cov ntu tshaj 1/4 nti (6 hli}}}℃{{8} degree). Ua ntej - cua kub sov qeeb qeeb qeeb tom qab vuam, tiv thaiv kev tsim ntawm tshav kub}} be} cuam tshuam cheeb tsam (Haz), uas yog thawj qhov ua rau muaj kev tawg.
CATER HLAU XAIV:
Rau kev sib txuam lub zog: qhov qis - hydrogen electrode zoo li Aws Ers er80s} d2 yog ib qho kev xaiv tig vuam. Nws phim cov chemistry thiab lub zog ntawm 4130 zoo.
Rau qhov kev ntxhov siab lossis tsis paub txog: rau cov khoom siv uas muaj kev ntxhov siab ntau, ib qho kev sib tsoo ntawm cov thawv siv tsis tau zoo li Aws Ers er309L feem ntau siv. Tus Austenitic weld hlau yog ntau dua coo thiab tuaj yeem nqus cov kev nyuaj siab ntxhov siab yam tsis muaj kev tawg, txo qhov kev pheej hmoo hauv lub taub hau.
Tshaj tawm - Weld Kev Kho Mob Cua Sov (PWtht {}} tseem ceeb} Cov kev tiv thaiv kub yog qhov tseem ceeb. Qhov no cuam tshuam nrog tag nrho cov sib dhos rau 1100℃f - 1200℃f (595} degree- 650 degree), tuav, thiab maj mam txias. Tus txheej txheem no:
Relieves residual kev nyuaj siab los ntawm vuam.
Tempers ib qho nyuaj martensite uas tsim nyob rau hauv lub Haz, Restoring Toubness thiab duction.
Yog qhov tseem ceeb rau kev ua kom ntev - nkim lub neej ntawm cov khoom siv.
Kev xyaum hydrogen ntau: siv tsuas yog ntxuav huv, qhuav, qis - hydrogen muab cov hlau. Yo dej noo yog ib qho chaw ntawm hydrogen, uas tuaj yeem ua rau ncua hydrogen - backing cracking (txias tawg) hauv lub taub hau.
5. Rau tus qauv tsim qauv, dab tsi yog cov kev txiav txim siab tseem ceeb thiab txhawb nqa lub neej rau cov khoom siv tau los ntawm 4130 pob zeb ncaj?
Txhawm rau kom ntseeg tau kev ntseeg tau thiab ua tau zoo ntawm 4130 tivthaiv, ib txoj kev rau txim los ntawm kev qhia tshwj xeeb los ntawm kev xaus - lub neej.
Kev qhia tshwj xeeb thiab kev ua tiav:
Txhais cov xwm txheej: Qhia meej rau cov mob uas xav tau ntawm kev xaj khoom (piv txwv li A829, annealed, "lossis" li qub ").
Cov Ntawv Pov Thawj Khoom Siv: rau cov ntawv thov tseem ceeb, hais kom muaj daim ntawv tshaj tawm siv pov thawj zeb (Mtr) los xyuas cov tshuaj lom neeg muaj pes tsawg leeg.
Raug thiab Fabrication Tswj:
Cov txheej txheem tsim nyog: xyuas kom meej tias txhua yam machining, thiab tshwj xeeb yog ua raws li cov txheej txheem tsim nyog uas hais txog ua ntej ua ntej, muab cov hlau, thiab duab kom ua ke.
Tsis - Kev sim tshuaj (ndt)
Hauv - kev pab cuam thiab tsis ua tiav tsim:
Qaug zog: Qhov no yog hom tsis ua hauj lwm tshaj plaws rau cyclically lo lus sib dhos. Tsim nrog cov kev hloov pauv thiab dav fillet radii los txo cov kev ntxhov siab kev ntxhov siab. Kev qaug zog nkees muaj zog ntawm kom muaj cua sov-} nrhiav 4130 yog qhov tseem ceeb rau nws xaiv.
Corrosion: 4130 tsuas yog me ntsis zoo dua corrosion tsis kam dua li cov hlau me me. Rau cov chaw ib puag ncig, txheej tiv thaiv kev tiv thaiv xws li pleev xim, hmoov tsho tiv no, lossis plating yog qhov tsim nyog.
Brittle bacture: Yog tias cov khoom siv yog welded tsis raug thiab tsis ntxhov siab {{} tuaj yeem nyob ruaj khov thiab muaj kev puas tsuaj rau kev cuam tshuam rau kev cuam tshuam rau kev cuam tshuam.
LifeCycle thiab txij nkawm:
Hauv - Kev Pab Cuam Haujlwm Kev Tshuaj Xyuas: Tsim cov kev tshuaj xyuas kev tshuaj xyuas kom pom cov cim ntawm kev tawg, distortion, lossis corrosion.
Kev kho cov vuam welding: nkag siab tias kho cov cua sov -}} kho 4130 tivthaiv yog qhov nyuaj. Nws yuav tsum tau muaj tib qho kev ua ntej nruj ua ntej {}} cua sov thiab pwht yuav yuav hloov cov khoom siv hauv zos. Feem ntau, hloov yog kev nyab xeeb dua thiab kev xaiv nyiaj txiag ntau dua.
Los ntawm cov kab ke hais txog cov ntsiab lus no, tus kws ua txuj ci tuaj yeem ntseeg siab zoo ntawm 4130 chromoly tiaj tus ntawm 4130 chromoly tiaj tus ntawm 4130 chromoly tiaj tus, muaj zog, thiab ruaj khov qauv thiab cov qauv ruaj khov.
