论文部分内容阅读
高铝锌基合金作为一种结构材料和耐磨减摩材料,无论在力学性能、工艺性能和经济性等方面都有很大的优越性,可以和一些高强度铸铁、青铜和铝合金相媲美。近一、二十年来在北美、欧洲等地得到很快的发展和推广应用。这类合金熔点低,流动性好,无热裂倾向和线收缩不大,从总的来说,其铸造工艺性是相当好的。但由于其凝固范围较宽,特别是其中的ZA—27合金,凝固温度范围达100℃以上,在铸件中容易出现缩松和一些特有的缺陷,严重地影响着它的力学性能和进一步扩大其使用范围。本文着重从合金化、完善工艺和复合化等方面来探讨进一步提高该类合金性能的
As a kind of structural material and wear-resisting and antifriction material, high aluminum-zinc-based alloy has great superiority in terms of mechanical properties, process performance and economy and can be compared with some high-strength cast iron, bronze and aluminum alloy . Nearly one or two decades in North America, Europe and other places to get rapid development and promotion of application. Such alloys have low melting point, good fluidity, no hot tearing tendency and little line shrinkage, and in general, the casting process is quite good. However, due to its wide range of solidification, especially its ZA-27 alloy, the solidification temperature range of more than 100 ℃, easy to appear in the casting shrinkage and some unique defects, seriously affecting its mechanical properties and to further expand its Use range. This article focuses on the alloying to improve technology and complex aspects to further improve the performance of this type of alloy