Kuv yuav ua li cas yog tias muaj cov vuam qhov hauv cov txheej txheem steel ua?

Hauv kev ua cov txheej txheem steel, tshwj xeeb tshaj yog nyob rau hauv cov txheej txheem vuam, muaj ntau cov ntsiab lus uas yuav tsum tau sau tseg thiab tiv thaiv ua ntej, xws li yuav ua li cas nrog vuam qhov pores, uas ntseeg tau tias yog ib qho teeb meem pos uas plagues ntau steel qauv manufacturers.Nrhiav nrog koj tom ntej.

Ua ntej tshaj plaws, cia peb nkag siab txog cov kev cai cuam tshuam txog kev vuam pores hauv kev ua cov qauv hlau: cov welds qib thawj thiab thib ob tsis raug tso cai kom muaj qhov tsis xws luag;qib peb welds raug tso cai kom muaj txoj kab uas hla <0.1t thiab ≤3mm rau 50mm ntev ntawm welds.Muaj 2 lub qhov cua;qhov sib nrug ntawm lub qhov yuav tsum yog ≥ 6 npaug ntawm txoj kab uas hla ntawm lub qhov.

Tom ntej no, peb yuav txheeb xyuas cov laj thawj tshwj xeeb rau kev tsim cov welding pores hauv kev ua cov txheej txheem steel:

1. Muaj cov roj stains, xeb me ntsis, dej stains thiab av (tshwj xeeb tshaj yog cov xim pleev xim) hauv qhov zawj thiab nws cov txheeb ze nyob ib puag ncig, uas yog ib qho laj thawj rau qhov pom ntawm qhov hws hauv qhov vuam;

2. Cov txheej txheej tooj liab ntawm cov vuam hlau yog ib nrab tev tawm, yog li ntawd ib feem yog xeb, thiab vuam seam yuav tsim pores;

3. Tom qab cua sov (deoxidation) ntawm lub workpiece tuab yog tsis nqa tawm nyob rau hauv lub sij hawm tom qab vuam, los yog tom qab cua sov kub tsis txaus, los yog lub sij hawm tuav tsis txaus, uas yuav ua rau residual pores nyob rau hauv lub weld;

4. Muaj kev sib raug zoo ntawm qhov chaw ntawm qhov pores thiab qhov kub thiab txias ntawm cov khoom siv vuam, cov cua kub ceev ceev heev, thiab lub sij hawm tuav tsis txaus.

Tom qab nkag siab qhov ua rau vuam porosity nyob rau hauv steel qauv ua, nws yog ib qho tseem ceeb kom paub txog nws cov kev tiv thaiv:

1. Nto pores nrog tus lej me me thiab txoj kab uas hla me me tuaj yeem ua rau hauv av nrog lub log sib tsoo, kom txog rau thaum qhov no tuaj yeem hloov kho nrog tag nrho cov vuam thiab hloov mus rau lub hauv paus hlau;

2. Lub workpiece tuab yuav tsum tau preheated ua ntej welding thiab ncav cuag qhov kub thiab txias raws li qhov specification.Thick workpieces yuav tsum nruj me ntsis tswj qhov kub ntawm lem;

3. Cov khoom siv vuam yuav tsum tau ci thiab ua kom sov raws li cov kev cai, thiab yuav tsum tsis txhob nyob hauv qhov chaw ntev tshaj 4 teev tom qab siv;

4. Ua tib zoo saib xyuas qhov chaw vuam thaum lub sij hawm vuam.Vuam yuav tsum raug tshem tawm thaum tus txheeb ze av noo ntau dua 90%;phau ntawv arc vuam yog ua thaum cua ceev tshaj 8m / s, thiab roj shielded vuam yog ua thaum cua ceev tshaj 2m / s.Thaum qhov kub qis dua 0 ° C, lub workpiece yuav tsum tau rhuab mus rau 20 ° C, thiab lub workpiece yuav tsum preheated yuav tsum tau preheated los ntawm 20 ° C nyob rau lub sij hawm no.

5. Ua tib zoo saib xyuas cov txheej txheem vuam tsis zoo thiab txhim kho cov kev txawj ntawm cov welder.Lub thoob ntawm cov roj shielded vuam yuav tsum tau tshuab los ntawm compressed cua nquag kom tshem tawm cov av.

Cov ntsiab lus txiav txim siab ua tiav lossis tsis ua tiav, thiab muaj ntau txoj hauv kev rau cov teeb meem hauv vuam, uas yog tshwj xeeb tshaj yog tsim nyog rau kev ua cov qauv steel.