1.Hho li cas los xaiv cov khoom siv hauv paus?
Cov pa roj carbon qis yog qhov nyiam: Siv cov pa roj carbon hlau tsawg dua lossis muaj sib npaug ntawm cov roj ntsha uas muaj kev ntxhov siab lossis sib luag ntawm ntau dua lossis sib npaug ntawm 25% thiab zoo dua cov khoom ua haujlwm zoo tshaj plaws).
Alloy keeb kwm kev cai:
Tswj cov ntsiab lus Si kom tsawg dua 0.1% kom zam dhau qhov tsim ntawm britte Fe-cov steel nyob rau hauv yog 30% siab dua li ntawm cov hlau dawb);
Ntxiv 0.01-0.05% al los ua kom zoo dua cov matrix nplej thiab txhim kho cov qoob loo loj (thaum cov noob qoob loo kom tsawg dua ntawm 20μm, tus lej ntawm cov khoom khoov tuaj yeem nce li 50%).
2.How los ua kom zoo dua cov txheej txheej sib xyaw?
Ntxiv cov ntsiab lus alloy rau zinc kua rau: ntxiv 0.1-0.2% al kom muaj ntau yam kev loj hlob zinc, yog li ntawd cov khoom siv ntshiab
Ntxiv 0.05-0.1% NI los ua kom zoo dua cov txheej txheej alloy (lis loj loj<5μm) and reduce brittleness (when the Ni content is 0.08%, the bending cracking rate decreases by 40%).
Tswj Cov Txheej Thickness
Cov txheej tuab ntawm cov phaj nyias (tsawg dua los yog sib npaug ntawm cov phiaj xwm ua kom tawg tau thaum muaj 30-30μm)
3. Kev tswj hwm cov txheej txheem galvanizing?
Tsawg lub sijhawm kub thiab lub sijhawm luv luv plating: Qhov kub thiab txias (20-30℃txheej (20-30℃txheej (ib txwm txheej txheej txheej (lub alloy txheej thillness yog txo los ntawm 10μm rau 5μm);
Lub ntsiab lus plating lub sijhawm yog tsawg dua los yog sib luag ntawm 8s), zam kev loj hlob ntawm alloy yog txo los ntawm 15s rau 8s rau Δase thickness yog txo los ntawm 30%).
Cua txias txoj kev optimization
Kev Txias Txias: Huab Cua Txias yog siv tom qab Galvanizing (tus nqi txias<5℃/s) to avoid quenching stress in the coating caused by water cooling (air cooling reduces the bending cracking rate by 60% compared with water cooling);
Annealing kev kho: anerting ntawm 200-250℃rau 1-2h tom qab galvanizing kom tshem tawm sab hauv qhov kev ntxhov siab ntawm 150MPA rau hauv qab 50MPA).
4.Qhov ua kom txheej me me softening?
Kev ntsuas kev kub siab: Tom qab Galvanizing, Tempering tau ua ntawm 200-300℃txheej (xws li binals txheej (tus naj npawb ntawm cov khoom siv tawv (tus naj npawb ntawm cov tawv tawv) tom qab 5 zaug mus rau 15 zaug);
Neeg kho tshuab xov: los ntawm dov lossis txhaj tshuaj peening, kev ntxhov siab compressive ntau dua lossis sib npaug ntawm 100% tom qab txhaj tshuaj peening).
5.Txoj kev kuaj pom zoo thiab kwv yees tsis taus?
Kev sim ua ntej ntawm kev kuaj ntshav
Ua ntej tsim khoom, kev xeem dabtsi yog nqa tawm raws li GB / T 232 tus qauv: siv r {{1} {degree (tsim nyog txheem: tawg ntev<1mm and no shedding); use a metallographic microscope to observe the thickness of the alloy layer (target ≤5μm). If the δ phase thickness is >8μm, cov txheej txheem galvanizing yuav tsum tau hloov kho.
Kev ntxhov siab thiab kev twv ua ntej
Finite elate tsom xam yog siv los simulation kev ntxhov siab ntawm cov qauv pwm (xws li kev kwv yees cov kev ntxhov siab cheeb tsam thiab kho cov hluav taws xob (hluav taws xob);
Ntsuam xyuas cov coating bonding lub zog ntawm qhov tseem ceeb. Thaum txoj kev sib raug zoo lub zog yog ntau dua los yog sib npaug rau 1, txoj kev pheej hmoo ntawm kev khoov kev tawg yog tsawg.