Casting defect ntawm malleable cam khwb cia hlau thiab tiv thaiv txoj kev

Ib qho yuam kev: Tsis tuaj yeem nchuav

Nta: cov duab casting tsis tiav, cov npoo thiab cov ces kaum yog puag ncig, uas feem ntau pom hauv cov phab ntsa nyias.

Yog vim li cas:

1. Iron kua oxygen yog qhov hnyav, cov ntsiab lus carbon thiab silicon tsawg, cov ntsiab lus sulfur siab;

2. Tsawg pouring kub, qeeb pouring ceev los yog intermittent pouring.

Txoj kev tiv thaiv:

1. Xyuas seb cov huab cua ntim loj dhau lawm;

2. Ntxiv relay coke, kho qhov siab ntawm lub hauv qab coke;

3. Txhim kho qhov kub thiab txias casting, thiab tsis txhob txiav tawm qhov khiav thaum lub sij hawm casting.

Qhov teeb meem thib ob: shrinkage xoob

Nta: qhov saum npoo ntawm qhov pores yog ntxhib thiab tsis sib xws, nrog dendritic crystals, concentrated pores rau shrinkage, me me dispersed rau shrinkage, ntau dua nyob rau hauv kub nodes.

Yog vim li cas:

1. Cov ntsiab lus ntawm cov pa roj carbon thiab silicon tsawg dhau, lub shrinkage yog loj, lub riser noj tsis txaus;

2. Lub pouring kub yog siab dhau lawm thiab lub shrinkage yog loj;

3, riser caj dab ntev dhau lawm, ntu me dhau;

4, qhov kub ntawm qhov casting yog tsawg dhau, qhov dej tsis zoo ntawm cov kua hlau tsis zoo, cuam tshuam rau kev pub mis;

Txoj kev tiv thaiv:

1. Tswj cov tshuaj muaj pes tsawg leeg ntawm cov hlau liquefaction kom tsis txhob muaj cov pa roj carbon tsawg thiab silicon;

2. nruj me ntsis tswj qhov kub thiab txias;

3, tsim nyog tsim riser, yog tias tsim nyog, nrog cov hlau txias, los xyuas kom meej qhov sib lawv liag;

4. Ua kom cov ntsiab lus ntawm bismuth kom tsim nyog.

Qhov tsis zoo peb: kub tawg, txias tawg

Nta: Kub tawg yog tawg raws li cov ciam teb ntawm qhov kub thiab txias, nrog tortuous zoo thiab oxidizing xim. Sab hauv kub tawg feem ntau coexists nrog shrinkage kab noj hniav.

Cov kab mob khaub thuas tshwm sim ntawm qhov kub thiab txias, cov pob txha tawg, cov duab tiaj tus, cov xim hlau nplaum lossis me ntsis oxidized nto.

Yog vim li cas:

1, solidification txheej txheem shrinkage yog thaiv;

2, cov ntsiab lus ntawm carbon nyob rau hauv cov kua hlau yog tsawg heev, cov ntsiab lus ntawm leej faj yog siab dhau lawm, thiab lub pouring kub yog siab dhau lawm;

3, kua hlau cov ntsiab lus yog loj;

4. Cov khoom siv tau ntim tau sai heev.

Txoj kev tiv thaiv:

1, txhim kho hom, tseem ceeb ntawm kev pom zoo;

2. Qhov loj feem ntawm carbon yuav tsum tsis pub tsawg tshaj 2.3%;

3, tswj cov ntsiab lus ntawm sulfur;

4, cupola rau siab qhov cub, huab cua ntim tsis tuaj yeem loj heev;

5, tsis txhob casting kub yog siab dhau lawm, thiab txhim kho qhov txias ceev, thiaj li ua kom cov nplej zoo dua;

6. Tswj lub ntim kub.