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墩粗直螺纹和滚扎直螺纹的区别？？？

2025-03-31 18:19:46

推荐回答（1个）

回答1：

钢筋机械连接形式的发展历程是由锥螺纹连接发展到镦粗直螺纹，再到滚轧直螺纹；因镦粗直螺纹加工造成金相组织改变而影响钢筋性能，变形模量降低，延性损失，容易在镦头区域脆断。而滚轧直螺纹克服了这些缺陷，且已成为目前广泛采用的钢筋连接形式。

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