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拉伸缠绕膜的“热处理”技术

小编寄语：大道至简!经典是简单的，真理是简单的，最有用的东西也是较简单的东西。复杂会造成浪费，而效能则来源于单纯。找到关键的部分，去除多余，成功并不那么复杂。

缠绕膜在热处理中，工件由于冷塑性变形，产生冷作硬化，使其塑性降低，变形抗力和硬度增大，再加上模具设计不合理，就需要进行中间退火，以软化金属，恢复塑性。注意：在一般工艺中中间退火不是必须的，毕竟要增加成本，要在增加工序和增加退火中进行选择，慎用！退火一般采用低温退火，即再结晶退火。退火时要注意的事项有两点：脱炭和氧化。这里主要讲讲氧化。工件氧化后有氧化皮，害处有二：使工件有效厚度变薄，增加模具磨损。

Stretch film in the heat treatment, the workpiece due to the cold plastic deformation, resulting in work hardening to reduce the plastic deformation resistance and hardness increase, coupled with the mold design is unreasonable, on the need for intermediate annealing to soften the metal, plastic recovery. Note: The intermediate annealing process in general is not necessary, after all, to increase the cost to increase and increase the annealing step to choose, with caution! Annealing generally use low-temperature annealing, that is recrystallization annealing. Matters annealing to note two things: DECARBONISATION and oxidation. Here mainly to talk about oxidation. After the oxidation of the workpiece oxide skin, harm is twofold: to make the work effective thinner, increasing the mold wear.

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