A.宏觀應(yīng)力B.結(jié)構(gòu)應(yīng)力C.微觀應(yīng)力D.表面應(yīng)力
A.補(bǔ)縮不當(dāng)B.補(bǔ)縮時(shí)間過長C.收縮受阻D.收縮不均勻
A.鑄、鍛件應(yīng)退火、正火等預(yù)備熱處理B.焊接件不應(yīng)在鹽浴爐加熱C.切屑量過大的零件應(yīng)進(jìn)行去應(yīng)力處理D.毛坯件應(yīng)去除氧化皮