Aluminium alloy tuag casting muaj pes tsawg leeg thiab casting zoo

1 lub ntiajteb txawj nqus.

2 Kev ua haujlwm zoo casting, tuaj yeem tuag casting complex zoo, nyias-walled precision qhov chaw, casting nto yog du.

3 Kev kho saum npoo yog xaiv tau: plating, txau, pleev xim, polishing, sib tsoo, thiab lwm yam.

4 Tsis muaj hlau nqus thaum yaj tuag-casting, tsis muaj corrosion molding, tsis sticking rau pwm.

5 Nws muaj cov khoom siv zoo thiab hnav tsis kam ntawm chav tsev kub.

6 tsawg melting point, melting point 385 ℃, yooj yim rau tuag casting. Kev ceev faj hauv kev siv:

1, tsis zoo corrosion kuj. Thaum lub alloy muaj pes tsawg leeg ntawm impurity ntsiab lead, cadmium, tin tshaj tus qauv, lub casting yuav tshwm sim aging deformation, manifested li ntim expansion, txhua yam khoom, tshwj xeeb tshaj yog plasticity poob ho, thiab txawm rupture tom qab ib tug ntev lub sij hawm.

Lead, tin, cadmium nyob rau hauv aluminium alloy solubility yog heev me me, yog li ntawd lawv yog concentrated nyob rau hauv lub grain ciam teb los ua lub cathode, aluminium-nplua nuj kua tov los ua tus anode, nyob rau hauv lub xub ntiag ntawm dej vapor los txhawb intergranular electrochemical corrosion. (Electrolyte). Tuag castings yog hnub nyoog vim intergranular corrosion.

2. Cov nyhuv laus

Lub koom haum ntawm zinc alloy feem ntau muaj zinc-nplua nuj cov kua uas muaj Al thiab Cu thiab Al-nplua nuj cov kua muaj Zn, thiab lawv solubility txo nrog txo qhov kub thiab txias. Txawm li cas los xij, vim yog qhov nrawm nrawm ntawm qhov tuag casting, qhov solubility ntawm cov khoom siv tau zoo heev saturated ntawm chav tsev kub. Tom qab ib lub sij hawm ntawm lub sij hawm, qhov tshwm sim oversaturation yuav maj mam alleviate, cov duab thiab qhov loj ntawm lub casting yuav hloov me ntsis.

3, zinc alloy tuag casting yuav tsum tsis txhob siv rau qhov kub thiab txias (0 ℃ hauv qab) chaw ua haujlwm. Zinc alloy muaj cov khoom siv kho tshuab zoo dua ntawm chav sov. Txawm li cas los xij, qhov kub thiab txias tensile lub zog thiab kub tsis tshua muaj kev cuam tshuam cov khoom raug txo qis.