Beryllium bronze is a widely used precipitation hardening alloy. 铍青铜是一种用处极广的沉淀硬化型合金。 After solid solution treatment and aging treatment, the strength can reach 1250-1500 MPa (1250-1500 kilograms). The characteristics of heat treatment are: after solid solution treatment, it has excellent plasticity and can undergo cold processing deformation. 经固溶实时效处理后,强度可达1250-1500MPa(1250-1500公斤),热处理厂特点是:固溶处理后具有优越的塑性,可进行冷加工变形。 However, after further aging treatment, it has excellent elastic limit, as well as improved hardness and strength. 但再进行时效处理后,却具有极好的弹性极限,还硬度、强度也获得进步。
(1) Solid solution treatment of beryllium bronze (1)铍青铜的固溶处理
The vacuum heat treatment heating temperature for ordinary solid solution treatment is between 780-820℃. For materials used as elastic components, 760-780℃ is adopted, mainly to avoid the influence of coarse grain on strength. 普通固溶处理的真空热处理加热温度在780-820℃之间,对用作弹性组件的资料,采用760-780℃,首要是避免晶粒粗大影响强度。 The average temperature of the solid solution heat treatment furnace should be strictly controlled within ±5℃. 固溶东莞热处理厂炉温平均度应严厉节制在±5℃。 The heating time for beryllium bronze can generally be calculated as 1 hour per 25mm. When beryllium bronze is heated for solid solution in air or oxidative atmosphere, an oxide film will form on the surface. 保温工夫普通可按1小时/25mm核算,铍青铜在空气或氧化性氛围中进行固溶加热处理时,外表会构成氧化膜。 Although it has little effect on the mechanical properties after aging strengthening, it will affect the service life of the molds used in cold processing. 固然对时效强化后的力学功能影响不大,东莞热处理厂但会影响其冷加工时工模具的运用寿命。 To prevent oxidation, heating should be carried out in a vacuum furnace or ammonia decomposition, inert gas, or reducing atmosphere (such as hydrogen, carbon monoxide, etc.). Then, a bright heat treatment result can be obtained. 为防止氧化应在真空炉或氨分化、惰性气体、复原性氛围(如氢气、一氧化碳等)中加热,然后取得亮光的热处理结果。 In addition, it is necessary to pay attention to minimizing the transfer time (during quenching). Otherwise, it will affect the mechanical properties after aging. 此外,还要留意尽量缩短转移工夫(此淬水时),不然会影响时效后的机械功能。 Thin materials should not exceed 3 seconds, and ordinary parts should not exceed 5 seconds. 薄形资料不得超越3秒,普通零件不超越5秒。 The quenching medium is generally water (without heating requirements), and for complex-shaped parts, oil can also be used to prevent deformation. 淬火介质普通采用水(无加热的要求),当然外形复杂的零件为了防止变形也可采用油。
(2) Aging treatment of beryllium bronze (2)铍青铜的时效处理
The heat treatment aging temperature of beryllium bronze in vacuum heat treatment is related to the content of Be. For alloys with a Be content of less than 2.1%, aging treatment should be carried out. 铍青铜的东莞真空热处理时效温度与Be的含量有关,含Be小于2.1%的合金均宜进行时效处理。 For alloys with a Be content greater than 1.7%, the optimal aging temperature is 300-330℃, and the heating time is 1-3 hours (depending on the shape and thickness of the part). 关于Be大于1.7%的合金,最佳时效温度为300-330℃,保温工夫1-3小时(依据零件外形及厚度)。 For high conductivity electrode alloys with a Be content lower than 0.5%, due to the increase in melting point, the optimal aging temperature is 450-480℃, and the heating time is 1-3 hours. Be低于0.5%的高导电性电极合金,因为溶点升高,最佳时效温度为450-480℃,保温工夫1-3小时。 In recent years, double-stage and multi-stage aging has also been developed. That is, first perform short-term aging at high temperature, then perform long-term aging at low temperature. The advantage of this method is that the performance improves but the deformation is reduced. 近年来还开展出了双级和多级时效,东莞热处理厂即先在高温短不时效,然后在低温下长工夫保温时效,如许做的长处是功能进步但变形量减小。 To improve the dimensional accuracy of beryllium bronze after aging, it can be treated by clamping with fixtures. Sometimes, two-stage separated aging treatment can also be adopted. 为了进步铍青铜时效后的尺寸精度,可采用夹具夹持进行时效,有时东莞热处理厂还可采用两段分隔时效处理。
(3) Stress relief treatment of beryllium bronze (3)铍青铜的去应力处理
The stress relief annealing temperature of beryllium bronze is 150-200℃, and the heating time is 1-1.5 hours. Vacuum heat treatment can be used to eliminate residual stress caused by metal cutting processing, straightening treatment, cold forming, etc., and to maintain the shape and dimensional accuracy of the parts during long-term use. 铍青铜去应力退火温度为150-200℃,保温工夫1-1.5小时,东莞真空热处理可用于消弭因金属切削加工、校直处理、冷成形等发生的剩余应力,不变零件在长时间运用时的东莞热处理厂外形及尺寸精度。
