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常规牌号的铝合金如Ly11,Ly12等,虽然具有一定的可锻性,但是由于其锻造温度范围窄。在一般条件下其塑性远不能满足复杂零件塑性变形的要求。在塑性变形过程中,变形硬化现象也给加工带来很大困难。目前,我公司光学仪器所用铝合金零件绝大部分是利用棒材,板材切削加工成形。材料利用率低,加工周期长,成本高。一九八三年我公司有关人员参与北京机
Conventional grades of aluminum alloys such as Ly11, Ly12, etc., although with a certain malleability, but because of its narrow forging temperature range. Under normal conditions, its plasticity can not meet the requirements of plastic deformation of complex parts. In the plastic deformation process, deformation and hardening also bring great difficulties to the processing. At present, most of the aluminum alloy parts used in optical instruments of our company are made of bar, sheet metal cutting and forming. Low material utilization, long processing cycle and high cost. In 1983 my company related personnel to participate in Beijing machine