所谓塑性,是指固体金属在外力作用下能稳定地产生永久变形而不破坏其完整性(不断裂、不破损)的能力。 金属在不同变形条件下允许的极限变形量称为塑性指标,是在特定条件下测得的,如拉伸时的断面收缩率及伸长率,冲击试验的冲击韧性;镦粗或压缩实验时第一条裂纹出现前的高向压缩率(最大压缩率);扭转实验破坏前的扭转角或扭转数;弯曲实验破坏前的弯曲次数等。
报导了通过改变热处理制度调整铝合金锻件强度与塑性指标。
This paper reports that the strength and Plasticity of aluminium alloy forging is adjusted by changing system of heat treatment.
对旋压工件采用不同温度的退火,得到不同的力学性能和塑性指标。
The different mechanical properties and plasticity of workpiece were obtained through adjusting annealing temperature.
它主要是由于热处理之后大量保留了稳定的亚组织,提高了材料的强度、塑性指标,而不降低材料的冲击韧性。
The treatment improves the tensile strength and ductility of the alloy without reduction of its impact toughness, chiefly because a large amount of substructure remains in it after the heat treatment.
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