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前 言 在铝硅合金的铸造与生产中,共晶硅细化是必不可少的处理技术,除用钠进行变质处理外,近年国内外都在研制新型变质剂,以适应各种铸造工艺和合金使用性能的需要。 我们使用混合稀土金属做铝硅合金的变质剂,能细化共晶硅,改善合金的铸造工艺性,提高合金某些特定的使用性能。我国稀土金属在铸造铝硅合金中应用不广泛,而国外在这方面已经取得了一定的成果。
Preface In aluminum-silicon alloy casting and production, eutectic silicon refinement is an essential processing technology, in addition to sodium modification, in recent years at home and abroad are developing new modifiers to adapt to a variety of casting processes and alloys Need to use performance. We use a mixture of rare earth metal Al-Si alloy modifier, can refine the eutectic silicon, improve the alloy casting process, improve the alloy for some specific performance. China’s rare earth metal in the casting of aluminum-silicon alloy is not widely used, and abroad in this regard has made some achievements.