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前 言 目前我国各种牌号的压铸锌合金,虽在压铸过程中有浇温低,填充成型容易,铸件精度高,抗压、耐磨性好和易进行电镀等一系列优点,但却存在较严重的“老化”问题。锌合金这一致命弱点,影响了它的广泛应用。 所谓“老化”,就是锌合金铸件在使用过程中,由于时效(包括自然和相当于某工作温度下的人工时效)产生体积(或尺寸)变化,致使铸件扭曲、变形、开裂等现象。为了有效利用我国锌的资源,探索一种抗“老化”性能高的新型锌合金,我们对
Preface At present, China’s various grades of die-cast zinc alloy, although in the casting process has a low pouring temperature, filling molding easy, high precision castings, compression, abrasion resistance and easy electroplating and a series of advantages, but there is more serious The “aging” problem. Zinc alloy this fatal weakness, affecting its wide range of applications. The so-called “aging”, that is, during the use of zinc alloy castings, due to aging (including natural and equivalent to a working temperature of artificial aging) to produce volume (or size) changes, resulting in casting distortion, deformation, cracking and so on. In order to effectively use our zinc resources and explore a new anti-aging "high-performance zinc alloy, we