Kev sib raug zoo ntawm qhov ceev ntawm vuam thiab qhov zoo ntawm vuam

Yuav tsum nkag siab txog kev sib raug zoo ntawm qhov ceev ntawm kev vuam thiab qhov zoo ntawm kev vuam thiab ob qho tib si yuav tsum tsis txhob raug tso tseg. Nws feem ntau pom nyob rau theem cua sov thiab theem crystallization.

1. Theem cua sov

Nyob rau hauv cov xwm txheej ua haujlwm ntawm cov kav dej ncaj nraim uas muaj zaus siab, ntug ntawm lub raj dawb paug raug cua sov los ntawm qhov kub hauv chav mus rau qhov kub vuam. Thaum lub sijhawm no, ntug ntawm lub raj dawb paug tsis muaj kev tiv thaiv kiag li thiab raug rau huab cua tag nrho. Qhov no yeej ua rau muaj kev cuam tshuam hnyav nrog oxygen, nitrogen thiab lwm yam khoom hauv huab cua, ua rau cov nitrogen thiab oxides hauv cov yeeb nkab vuam ntau ntxiv. Nws tau raug ntsuas tias cov ntsiab lus nitrogen hauv cov yeeb nkab vuam nce ntxiv 20 txog 45 npaug vim li ntawd. Yog li cov ntsiab lus oxygen nce ntxiv 7 txog 35 npaug. Lub caij no, ntau cov khoom sib xyaw xws li manganese thiab carbon uas muaj txiaj ntsig zoo rau cov yeeb nkab vuam raug hlawv thiab ua pa, ua rau cov khoom siv kho tshuab ntawm cov yeeb nkab vuam txo qis. Los ntawm qhov no, nws tuaj yeem pom tias hauv qhov kev nkag siab no, qhov qeeb qeeb qhov ceev ntawm cov yeeb nkab vuam, qhov zoo ntawm cov yeeb nkab vuam yuav phem dua.

Tsis yog li ntawd xwb, qhov ntev ntawm ntug ntawm lub raj cua sov raug rau huab cua, uas yog, qhov qeeb qeeb ntawm qhov vuam ceev, qhov ntau cov oxides tsis yog hlau yuav raug tsim tawm ntawm qib tob dua. Cov oxides tsis yog hlau tob no nyuaj rau extruded tawm ntawm lub weld seam thaum lub sijhawm extrusion crystallization tom qab. Tom qab crystallization, lawv tseem nyob hauv lub weld seam hauv daim ntawv ntawm cov khoom tsis yog hlau, tsim ib qho interface tawg yooj yim. Yog li ntawd rhuav tshem qhov sib xws ntawm cov qauv weld thiab txo qhov muaj zog ntawm lub weld. Qhov ceev ntawm qhov vuam ceev, qhov luv dua lub sijhawm oxidation, thiab cov oxides tsis yog hlau tsawg dua, uas txwv rau txheej saum npoo, tuaj yeem yooj yim extruded tawm ntawm lub weld seam thaum lub sijhawm extrusion tom qab. Kuj tseem yuav tsis muaj cov khoom seem tsis yog hlau ntau dhau hauv lub weld seam, thiab lub zog ntawm lub weld seam siab.

2. Theem Crystallization

Raws li cov ntsiab cai ntawm metallography, kom tau txais cov vuam muaj zog siab, nws yog qhov tsim nyog los ua kom cov noob ntawm cov qauv vuam ntau li ntau tau. Txoj hauv kev yooj yim rau kev ua kom zoo yog tsim kom muaj cov nuclei siv lead ua kom txaus hauv lub sijhawm luv luv, kom lawv sib cuag ua ntej loj hlob thiab cov txheej txheem crystallization xaus. Qhov no yuav tsum tau nce qhov ceev ntawm kev vuam kom ua rau cov hlau txuas weld tawm ntawm thaj chaw cua sov sai sai, kom cov hlau txuas weld tuaj yeem crystallize sai sai ntawm qib siab dua ntawm subcooling. Thaum qib ntawm undercooling nce, qhov nrawm ntawm nucleation tuaj yeem nce ntau, thaum qhov nrawm ntawm kev loj hlob nce tsawg dua, yog li ua tiav lub hom phiaj ntawm kev ua kom cov hlau txuas weld.

Yog li ntawd, txawm tias saib los ntawm theem cua sov ntawm cov txheej txheem vuam lossis txias tom qab vuam, nyob rau hauv lub hauv paus ntawm kev ua tau raws li cov xwm txheej vuam yooj yim, qhov ceev ntawm qhov vuam ceev, qhov zoo dua ntawm qhov vuam seam.

Maventshuab vuam laser roboticyog lub laser fiber uas txuas lub teeb laser muaj zog nrog lub laser robotic ua lub platform txav mus los rau kev vuam. Txhua qhov chaw tuaj yeem vuam tau. Lub tshuab vuam laser ntau lub hom phiaj tuaj yeem raug programmed los vuam cov khoom uas nyuaj rau nkag mus nrog cov tshuab vuam laser ib txwm muaj, muab kev ywj pheej vuam siab tshaj plaws. Lub teeb laser tuaj yeem faib ua lub sijhawm thiab lub zog, ua rau kev ua tiav ntau lub teeb tib lub sijhawm thiab txhim kho kev tsim khoom vuam.