一、前言ZL-201铸造铝合金,属 Al-Mn-Cu-Ti 合金。由于 MnCu Ti 合金元素的加入,该合金通过热处理可明显的得到强化,故铸件大多在 T_4或 T_5状态下使用。为了获得最佳机械性能,热处理淬火温度一般都在接近固相线(548℃)附近,铸件易产生成分偏析,合金的相组成复杂,所以在热处理过程中,易产生过烧现象。为了保证产品质量,在生产检查中,必须检查金相组织是否过烧。为此,弄清该合金的过烧温度、组织过烧形态以及它对机械性能的影响,就十分必要,本文对上述问题进行探讨。 First, the preface ZL-201 cast aluminum alloy, is an Al-Mn-Cu-Ti alloy. Due to the addition of MnCu Ti alloy elements, the alloy can be obviously strengthened by heat treatment, so the castings are mostly used in the state of T_4 or T_5. In order to obtain the best mechanical properties, the heat treatment quenching temperature is generally close to the solidus (548 ℃) near the casting easy to produce composition segregation, alloy phase composition is complex, so in the heat treatment process, prone to over-burning phenomenon. In order to ensure product quality, in the production inspection, you must check the microstructure is over-burning. Therefore, it is necessary to understand the over-burning temperature of the alloy, the over-burning behavior of the alloy and its influence on the mechanical properties. This article discusses the above problems.