| 铸造是人类掌握比较早的一种金属热加工工艺 |
| 添加时间：2019/3/14 16:21:49 浏览次数： |
| 铸造是人类掌握比较早的一种金属热加工工艺，已有约6000年的历史。中国约在公元前1700～前1000年之间已进入青铜铸件的全盛期，工艺上已达到相当高的水平。铸造是指将固态金属熔化为液态倒入特定形状的铸型，待其凝固成形的加工方式。被铸金属有：铜、铁、铝、锡、铅等，普通铸型的材料是原砂、黏土、水玻璃、树脂及其他辅助材料。特种铸造的铸型包括：熔模铸造、消失模铸造、金属型铸造、陶瓷型铸造等。（原砂包括：石英砂、镁砂、锆砂、铬铁矿砂、镁橄榄石砂、兰晶石砂、石墨砂、铁砂等） Foundry is a kind of metal hot working technology that human beings have mastered earlier, and it has a history of about 6000 years. Between 1700 BC and 1000 BC, China has entered the peak period of bronze castings and reached a fairly high level of technology. Casting refers to the process of melting zhuguangzhi.37ix.com.cnjinyinzhi.37ix.com.cnsekazhi.37ix.com.cn tongfengg.37ix.com.cnshusongdaih.07858.netshusongdaif.07858.netsolid metals into liquid and pouring them into a specific shape of the mold for solidification. Cast metals include copper, iron, aluminium, tin, lead, etc. Common casting materials are raw sand, clay, sodium silicate, resin and other auxiliary materials. Special casting moulds include investment casting, lost foam casting, metal casting and ceramic casting. (raw sand includes quartz sand, magnesia sand, zirconium sand, chromite sand, forsterite sand, orchidite sand, graphite sand, iron sand, etc.) |
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