Zinc alloytuag-casting qhov chawtam sim no tau siv nyob ib ncig ntawm ntau yam khoom.Ntau yam khoom siv hluav taws xob thiab cov khoom siv hluav taws xob yog ib puag ncig los ntawm zinc alloy tuag-casting khoom.Yog li ntawd, qhov zoo ntawm cov castings yuav tsum tau siab, thiab kev kho deg zoo yuav tsum tau muaj peev xwm.Qhov feem ntau tsis xws luag ntawm zinc alloy casting khoom yog nto blistering.
Defect characterization: Muaj vesicles tsa nyob rau saum npoo ntawm lubtuag casting.① Pom tom qab tuag-casting;② Tshaj tawm tom qab polishing lossis ua tiav;③ tshwm tom qab cov roj txau lossis electroplating;④ tshwm tom qab muab tso rau lub sijhawm.
Feem ntau ntawm cov hlwv nyob rau saum npoo ntawm zinc alloy yog tshwm sim los ntawm qhov hws, thiab qhov pores yog qhov pores thiab qhov shrinkage.Cov pores feem ntau yog puag ncig, thiab feem ntau ntawm cov qhov shrinkage yog qhov tsis sib xws.
1. Ua rau cov pores: ① Thaum lub sij hawm txhaws thiab solidification txheej txheem ntawm cov hlau molten, qhov yog tsim nyob rau saum npoo los yog sab hauv ntawm lub casting vim yog intrusion ntawm roj;② cov roj invaded los ntawm volatilization ntawm txheej;③ cov roj cov ntsiab lus ntawm cov kua alloy yog siab dhau lawm thiab ua rau lub sijhawm khov.
2. Yog vim li cas rau shrinkage kab noj hniav: ①Nyob rau hauv tus txheej txheem ntawm molten hlau solidification, shrinkage kab noj hniav tshwm sim vim qhov txo nyob rau hauv ntim los yog qhov kawg solidified ib feem yuav tsis pub los ntawm molten hlau;② Lub thickness tsis sib npaug ntawm cov casting los yog ib nrab overheating ntawm lub casting ua rau ib feem ntawm Solidification qeeb, thiab kab noj hniav yog tsim rau saum npoo thaum lub ntim shrinks.
Vim muaj qhov pores thiab shrinkage qhov, lub qhov yuav nkag tau thaum cov khoom tuag-casting raug rau saum npoo.Thaum ci tom qab pleev xim thiab electroplating, cov roj hauv lub qhov nthuav dav los ntawm tshav kub;los yog dej nyob rau hauv lub qhov yuav tig mus rau hauv chav, uas yuav ua rau blistering nyob rau saum npoo ntawm lub casting.
Xa koj cov lus rau peb:
Post lub sij hawm: Mar-06-2021