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热处理的作用是什么?

问答题
2021-12-28 20:13
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正确答案

普通钢材轧制后是自然堆放而不做热处理。如经过适当的热处理,则可以显著提高其强度并保持其良好的塑性和韧性。我国一般钢结构中目前尚不采用热处理钢材,而高强度螺栓则是用一些强度较高的优质碳素结构钢(45、35号钢)或低合金结构钢(20MnTiB、40B、35VB钢等),制成螺栓后进行热处理调质(淬火后高温回火),以进一步提高其强度和质量性能。


试题解析

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