Preparation method of alloy foil

The invention relates to the technical field of alloy preparation, in particular to a preparation method of an alloy foil. The method comprises the steps that continuous ultrasonic cleaning is conducted on a cold-rolled strip blank, and then drying is conducted; under the condition that the roughness of a roller of a rolling mill and the saponification value of rolling oil are set, the dried strip blank is rolled in a staged mode, and alloy foil is obtained; wherein the strip blank rolled each time is washed and dried, and then is annealed. The technical problem that the surface cleanliness of an existing alloy foil is low is solved. 本申请涉及合金制备技术领域，尤其涉及一种合金箔材的制备方法。所述方法包括：对冷轧带坯进行连续超声清洗，后进行干燥；在设定轧机轧辊的粗糙度和轧制油皂化值的条件下，分阶段对干燥后的所述带坯进行轧制，得到合金箔材；其中，对每次轧制后的所述带坯进行洗涤和干燥，后进行退火。本申请内容解决了现有合金箔材表面清洁度较低的技术问题。