Cov ntsiab lus tseem ceeb ntawm tooj dag phaj thiab sawb ntau lawm txheej txheem
1. Cua sov lub ingot. High-zinc tooj dag yog ib qho yooj yim rau "dezincify" ntawm qhov kub thiab txias, thiab qee qhov nyuaj brasses muaj kev ntxhov siab loj. Yog li ntawd, tooj dag feem ntau tsis haum rau cov cua kub ceev ntawm qhov kub thiab txias. Cov cua hauv qhov cub yuav tsum me ntsis oxidizing.
2. Kub dov. Qee cov tooj dag (xws li zinc tooj dag siab, thiab lwm yam) muaj cov theem nkig ntxiv rau theem ntawm qhov kub thiab txias. Nws yog qhov zoo tshaj plaws kom tsis txhob muaj qhov kub thiab txias thaum lub sij hawm kub dov kom tsis txhob tawg. Tsawg-zinc tooj dag yooj yim (xws li H96, H90, thiab lwm yam) muaj cov yas zoo thiab tuaj yeem kub dov nyob rau hauv qhov kub thiab txias, thaum qee cov tooj dag nyuaj xws li txhuas tooj dag muaj qhov kub-kub plasticity, yog li qhov kub ntawm qhov kub thiab txias. kub dov yog nqaim. Txhawm rau ua kom nrawm nrawm, xyuam xim rau qhov txias.
3. Txias dov. Cov tooj dag yooj yim kuj muaj cov yas zoo heev, thiab cov txheej txheem ua tiav tuaj yeem ncav cuag ntau dua 75%, thaum cov tooj dag feem ntau muaj cov yas tsis zoo, thiab qee qhov kev ua haujlwm tsawg dua 50%. Yog li ntawd, chav tsev yuav tsum tau sab laug thaum tsim tag nrho cov txheej txheem ua kom tsis txhob tawg cov npoo thiab cov hlua tawg.
4. Annealing. Qee cov tooj dag (xws li HPb59-1, H62, thiab lwm yam) yog rhiab rau kev ntxhov siab sab hauv thiab yuav tsum tau muab tshem tawm hauv 24 teev tom qab ua haujlwm txias kom tsis txhob tawg lossis deformation vim muaj kev ntxhov siab sab hauv loj (xws li cov roj ladle). Rau high-zinc tooj dag, lub annealing kub yuav tsum tau txo kom tsis txhob kub-kub dezincification thiab "pitting" defects nyob rau hauv cov khoom. Vim hais tias zinc nyob rau hauv tooj dag kuj muaj ib tug degassing nyhuv thaum lub sij hawm casting, cov roj cov ntsiab lus nyob rau hauv cov hlau yog tsawg, yog li cov hydrogen cov ntsiab lus nyob rau hauv lub tiv thaiv roj thaum lub sij hawm annealing yuav siab tshaj li thaum annealing ntawm tooj liab.
5. Ntxuav thiab ua kom tiav. Thaum pickling tooj dag, cov kua qaub concentration yuav tsum tsis txhob siab dhau thiab lub sij hawm yuav tsum tsis txhob ntev heev kom tsis txhob "dezincification" vim over-pickling. High-zinc tooj dag cov khoom nyuaj thiab cov khoom siv ib nrab yuav tsum tsis txhob raug ncaj rov qab, txwv tsis pub lawv yuav tsum tau txo qis kev ntxhov siab thiab ua rau lub sijhawm.
