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提出了２０碳钢的最佳退火工艺，即将退火温度限定在７１０℃进行退火。这种热处理工艺，在改善低碳钢冲压成形方面，具有良好效果。
The optimal annealing process of 20 carbon steel is proposed, that is, the annealing temperature is limited to 710 ℃ for annealing. This heat treatment process, in improving low-carbon steel stamping, with good results.