1. Piv nrog castings, forging tuaj yeem tshem tawm qhov tsis xws xws li xoob raws li cov hlau nrum thaum cov txheej txheem zom.
2. Ua kom zoo dua microstructure, thiab vim yog kev khaws cia ntawm cov hlau ua tiav, cov hlau muaj cov cuab yeej siv tau zoo heev thiab kev pab lub neej.
3. Cov khoom siv dag zog thiab cov khoom siv dag zog ntawm kev zam txim feem ntau zoo dua li cov castings ntawm cov khoom qub.