Yuav Kho Bronze Propeller li cas nrog ECuSn -C Phosphor Bronze Electrode
Phosphor bronze propellers siv rau ntawm cov nkoj nuv ntses, cov nkoj nkoj, thiab ntau lub nkoj ua haujlwm feem ntau raug kev txom nyem los ntawm cavitation pitting, ntug chipping, thiab kev puas tsuaj. Ib qho khoom siv feem ntau siv rau kev kho qhov chaw kho yog AWS A5.6 ECuSn-C, flux-coated electrode (tsim rau phau ntawv arc vuam) ua los ntawm phosphor bronze muaj 8% tin. Nws muaj kev tiv thaiv zoo heev rau seawater corrosion, thiab cov xim xim ib txwm phim cov xim bronze ntawm lub casting nws tus kheej.
Ntxuav thiab tshuaj xyuas
Kho qhov chaw puas ntawm cov hniav los ntawm sandblasting los yog hlau txhuam kom txog rau thaum lub ci bronze-xim puag hlau raug. Ua dye-kev ntsuam xyuas kev nkag mus los txiav txim siab qhov twg ntawm cov kab nrib pleb, tom qab ntawd zom cov cheeb tsam uas siv cov carbide burr kom txog thaum lub suab ntawm cov hlau raug nthuav tawm. Thaum kawg, so lub ntsej muag nrog acetone.
Preheat cov hniav
Phosphor bronze muaj cov thermal conductivity siab heev, ua rau cua sov kom sai sai ntawm lub pas dej molten. Preheating yog qhov tseem ceeb:
- Cov lus qhia nyias nyias (< 10 mm): 100 – 150 °C
- Thick propeller hub and root (>20 hli): Ntau dua lossis sib npaug li 200℃(400℃F) thiab tswj raws li kev sib tshuam
Siv lub rosebud torch los yog induction cua sov ncoo. Tsis txhob tshaj 300 degree, los yog cov flux yuav ua tsis tau zoo.
Weld nrog DCEP nkaus xwb
| Txoj kab uas hla | DCEP amperage (Cauv / Kab rov tav) |
|---|---|
| Ø 2.5 hli | 50 – 80 A |
| Ø 3.2 hli | 80 – 120 A |
| Ø 4.0 hli | 110 – 160 A |
- DCEP nkaus xwb- AC lossis DCEN yuav tsis txhawb nqa lub arc.
- Cov cua kub ntau dua, kev mus los sai dua li cov hlau- khaws cov dej hauv pas dej ua ntej nws khov.
- Luv stringer hlaws dai, redry electrodes 120 - 150℃× 1 h ua ntej siv.
Tshuab rau cov hniav profile
Txias maj mam hauv huab cua (tsis txhob quench hauv dej). Siv lub template rau kev sib tsoo thiab ua ntaub ntawv los kho qhov overlay mus rau qhov qub hniav profile. Lub ECuSn-C weld overlay, uas tuaj yeem ua tshuab lossis tes- polished kom ua tiav qhov chaw du, yog machinable tag nrho thiab nws cov xim sib xws ntawm CuSn8 casting.
FAQ
Q: Kuv puas tuaj yeem vuam tooj dag propellers nrog aluminium-bronze electrode (ECuAl-A2)?
A: ECuAl-A2 muab lub zog ntau dua thiab hnav tsis kam, tab sis qhov tso nyiaj yog daj-kub - pom qhov tsis sib xws nrog phosphor-bronze castings. Siv ECuSn-C rau tshuaj pleev ib ce- kho qhov tseem ceeb; siv ECuAl-A2 rau siab-load manganese-bronze lossis npib tsib xee-aluminium-bronze propellers.
Q: Vim li cas ECuSn -C xav tau preheat thaum hlau electrodes tsis?
A: Copper alloys ua cua sov ~ 5 × sai dua hlau. Yog tsis muaj preheat, niam txiv cov hlau tso cua sov los ntawm lub pas dej ua ke thiab koj tau txais tsis muaj - ntawm - fusion defects.
Q: Kuv puas xav tau PWHT tom qab kho?
A: yeem. Kev ntxhov siab- nyem ntawm 300-350℃txhim kho ductility yog tias qhov tso nyiaj yuav txias heev- ua haujlwm, tab sis rau kev kho cov hniav cam nws tsis tas yuav tsum tau.
