宝珠砂在发动机铸件生产中的应用

Application of Baozhu Sand in Engine Castings Production

宝珠砂是我国开发的一种粒形近圆、耐火度高、化学性质稳定、抗破碎性强的铸造人工砂,具有节约粘结剂用量、减少铸件缺陷、提高铸件质量、降低废弃物排放等显著效果已经在砂型铸造(潮模砂、水玻璃砂,树脂自硬砂、热芯盒、冷芯盒)及消失模铸造等生产铸铁、铸钢、有色合金中得到广泛应用。目前,最大的应用场合是发动机铸造行业。本文介绍了一些宝珠砂在发动机铸件,包括气缸体、气缸盖、排气歧管和涡轮增压器壳体中的应用实例,分析了部分工艺参数、应用要点、效果和效益。

Baozhu sand is a kind of artificial fused ceramic foundry sand developed in China.Baozhu sand has nearly round shape,stable chemical properties and strong crushing resistance.It has remarkable effects of saving binder dosage,reducing casting defects,improving casting quality and reducing waste discharge.It has been widely used in sand casting(green sand mold sand,sodium silicate sand,resin self-hardening sand,hot core box,cold core box)and expendable casting proces and other production of cast iron,cast steel and non-ferrous alloy.At present,the biggest application is the engine foundry industry.Some application examples of Baozhu sand in engine castings,including cylinder block,cylinder head,exhaust manifold and turbocharger casing are introduced,and some process parameters,application points,effects and benefits are analyzed.