1. 化学組成:
熱交換フィン用アルミニウム箔の合金グレードは主に次のとおりです。 1100, 1200, 8011, 8006, 等. 使用の観点から見ると, エアコンにはアルミニウム熱交換フィンの化学組成に関する厳格な要件はありません. 表面処理なし, 3A21 アルミニウム合金は比較的優れた耐食性を持っています, 強度や伸びなどの高い機械的特性, and high hardness. The choice of alloy depends primarily on the final mechanical properties the material can achieve and the ease of the ant process. 例えば, の 1 100 aluminum alloy with higher purity is easier to roll, while the 8011 alloy is more difficult.
2. Mechanical properties:
Mechanical properties mainly refer to the tensile strength, elongation and cupping value of aluminum foil. 使用の観点から見ると, it is hoped that these three indicators are as high as possible, but in terms of the material itself, these three indicators are contradictory, つまり, when the tensile strength of the aluminum foil is relatively high, the elongation index will decrease; When the elongation of the aluminum foil is increased, the tensile strength will decrease. したがって, in practical applications, the intermediate value of the mechanical properties is generally taken, and the specific strength and plasticity values are related to the punching die during the processing of the heat exchange fin. 一般的に, the punching process of heat exchange fins is divided into two types: stretching type and non-stretching type. The mold for stretch punching requires better plasticity of the aluminum foil, つまり, the elongation is higher, and the relative strength value can be slightly lower; while the non-stretch mold requires higher strength of the aluminum foil, and plasticity is a secondary indicator. There are many factors affecting the mechanical properties of aluminum foil, mainly the chemical composition and processing technology of aluminum foil. As far as the strength and plasticity of aluminum foil are concerned, by adjusting the chemical composition or changing the processing process and parameters, the plasticity or strength of the material can be changed within a certain range while keeping one side unchanged. つまり, through the adjustment of chemical composition and processing technology, the matching value of aluminum foil strength and plasticity can be changed limitedly.
According to the different requirements for mechanical properties of heat exchange fins, there are currently three main use states of aluminum foil: H22, H24, and H26. Each state corresponds to a certain range of strength and plasticity. Judging from the current situation of the domestic aluminum processing industry, there is no unified standard for the range of mechanical properties of each state. 同時に, in practical application, the range of mechanical properties of each state is too wide, and the mechanical properties of the product cannot be well controlled to satisfy the user.
