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Cu-Ni-Mn合金是一种新型的铜基弹性材料,主要用于代替铍青铜做弹性元件,代替易切削钢做手表擒纵轮片和其它元件。近年来国外发展很快。国内已提出用这种材料做机械手表的擒纵片和擒纵叉,以及代替铍青铜做各种弹性元件。本文简单介绍该合金的淬火工艺和时效制度,以充分发挥合金的潜力。 1.试样制备试样用合金成分为:20%Ni、20%Mn,余量为铜及少量其它元素。淬火试样采用厚度为0.1mm的板材,板材最后一次冷加工变形率为70%。经机械加工成拉伸试样和硬度试样。淬火时效试样是用冷加工变形率为70%的0.40mm厚的板材,经淬火后进行时效;冷加工变形率为30%的时效试样,是用淬火
Cu-Ni-Mn alloy is a new type of copper-based elastic material, which is mainly used as an elastic element instead of beryllium bronze instead of free-cutting steel to make watch escapement piece and other components. In recent years, foreign countries have developed rapidly. China has proposed the use of such materials as mechanical watches and escapement escapement fork, and instead of beryllium bronze to do all kinds of flexible components. This article briefly introduces the alloy quenching process and aging system, in order to give full play to the potential of the alloy. 1. Sample Preparation Sample alloy composition: 20% Ni, 20% Mn, the balance of copper and a small amount of other elements. Quenched specimens using a thickness of 0.1mm plate, plate deformation of the last cold deformation rate of 70%. Machined into tensile specimens and hardness specimens. Quenching specimens are cold deformation rate of 70% 0.40mm thick plate, after quenching aging; cold deformation rate of 30% of the aging specimens, is quenched